feat(web): UI premium Discord/Spotify-like — tokens, shadows, focus, layout

Plan UI premium 6–8 semaines (design system, shell, Storybook, a11y): - Design system: DESIGN_TOKENS.md, APP_SHELL.md, FULL_LAYOUT_PAGE.md. Single source for layout/shell (index.css), shadows (design-system.css), durations/easing. - Tokens: shadow-cover-depth, shadow-gold-glow, shadow-fab-glow; layout max-height (max-h-layout-drawer, max-h-layout-panel, max-h-layout-list). All duration-200/300/500 replaced by --duration-fast/normal/slow. Arbitrary shadows replaced by token classes. - Shell & player: Sidebar, Header, GlobalPlayer, MiniPlayer, PlayerQueue, PlayerControls, AudioPlayer use tokens; focus-visible on Sidebar, PlayerQueue, DropdownMenuTrigger/Item, TabsTrigger. Typography: text-[10px]/[9px] → text-xs where applicable. - ESLint: no-restricted-syntax (warn) for w-/h-/rounded-/shadow-/text-/spacing arbitrary. - Scripts: report-arbitrary-values.mjs, capture/compare/generate visual; visual-complete.spec.ts. - Stories full layout: Dashboard, Playlists, Library, Settings, Profile in DashboardLayout.stories. - .cursorrules + README: DESIGN_TOKENS, APP_SHELL, visual commands, no arbitrary without justification. - apps/web/.gitignore: e2e test artifacts (test-results-visual, playwright-report-visual). Co-authored-by: Cursor <cursoragent@cursor.com>
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 ## 1. Standards Tailwind & Layout

- **Interdiction formelle** d'utiliser des valeurs arbitraires (ex: `w-[300px]`) pour les espacements, tailles ou marges.
+- **Interdiction formelle** d'utiliser des valeurs arbitraires (ex: `w-[300px]`, `gap-[7px]`, `rounded-[12px]`, `shadow-[...]`) pour les espacements, tailles, rayons ou ombres sans justification (voir exceptions dans `apps/web/docs/DESIGN_TOKENS.md`).
 - Utilise exclusivement l'échelle de spacing native de Tailwind ou les **Layout Primitives** définies dans `apps/web/src/index.css` :
  - `max-w-layout-content` (1600px)
  - `min-h-layout-main` (calc(100vh - 4rem))
  - `min-h-layout-page` (600px)
  - `min-h-layout-page-sm` (400px)
  - `min-h-layout-story` (192px, pour les stories)
+- Référence unique : **DESIGN_TOKENS.md** et **APP_SHELL.md** dans `apps/web/docs/` pour layout, espacements, ombres, typo, transitions.

 ## 2. Cycle de Vie des Composants (Storybook-First)

@ -29,3 +30,9 @@
 ## 4. Audit & Qualité

 - Avant de finaliser une tâche, lance `npm run test:storybook` (depuis `apps/web`) après build + serve sur 6007 pour garantir 0 erreur réseau/console.
+
+## 5. Tests visuels et valeurs arbitraires
+
+- **Commandes visuelles** (depuis `apps/web`) : `npm run visual:capture` (capture écrans → `visual-tests/current/`), `npm run visual:compare` (diff vs baselines), `npm run visual:update` (mise à jour des baselines). Procédure détaillée dans `apps/web/visual-tests/README.md`.
+- **Rapport des valeurs arbitraires** : `node scripts/report-arbitrary-values.mjs` (optionnel `--json` ou `--dir src/features`) pour lister les patterns à migrer ; pas de remplacement automatique sans revue.
+- **Nouvelle page full layout** : suivre `apps/web/docs/FULL_LAYOUT_PAGE.md` (route, story, MSW, viewport).
--- a/apps/web/.gitignore
+++ b/apps/web/.gitignore
@ -0,0 +1,4 @@
+# Test / E2E artifacts (generated by Playwright visual tests)
+e2e/test-results-visual/
+e2e/playwright-report-visual/
+e2e/playwright-report-visual/**/data/
--- a/apps/web/AUDIT_STRATEGIQUE_FRONTEND_2025.md
+++ b/apps/web/AUDIT_STRATEGIQUE_FRONTEND_2025.md
@ -0,0 +1,280 @@
+# Audit stratégique frontend — Veza
+
+**Date** : 2025-02-08  
+**Équipe fictive** : Staff Frontend Engineer, Principal Product Designer, Architecte logiciel senior, Tech Lead perf/a11y/DX, Product Manager.  
+**Objectif** : Diagnostic sans complaisance, écart vs Discord/Spotify, feuille de route et recommandations actionnables.
+
+---
+
+## A. Diagnostic brutal mais honnête
+
+### Niveau global de l’application
+
+**Verdict : intermédiaire à senior (6/10), avec des poches de niveau amateur et quelques bases solides.**
+
+Justification en une phrase : *Vous avez mis en place une structure feature-based, un design system documenté, des patterns (skeletons, optimistic UI, MSW), et une batterie de tests/stories, mais l’exécution est inégale, les règles du projet sont régulièrement violées (valeurs arbitraires, double source d’auth), et le ressenti “produit fini” est entamé par des correctifs visibles (fix-*.css, patches dans main.tsx) et une cohérence a11y/UX partielle.*
+
+- **Architecture** : Correcte en intention (features/, services/, stores/, router lazy), mais **artisanale** dans les détails (double source d’auth, callbacks no-op en route config, stores globaux vs feature stores).
+- **Qualité du code** : Bonne sur les parties auditées (auth, playlists, player), **dette structurelle** (duplication auth Context vs Store, ~130 fichiers avec valeurs Tailwind arbitraires malgré une règle explicite).
+- **Performance** : Bonne base (lazy routes, React Query, skeletons), mais pas de stratégie Suspense/streaming ni de priorisation explicite perçue vs mesurée. Voir *Checklist priorisation performance* ci-dessous.
+- **Design system** : **Solide** sur le papier (KŌDŌ v3, tokens, layout primitives, dark mode), **fragile** en pratique (règles de layout violées massivement, pas de lint pour les primitives).
+- **UX / micro-interactions** : Suffisante pour un produit interne, **insuffisante** pour un produit “premium” (feedback incohérent, états vides/erreur pas toujours traités de façon homogène).
+- **Accessibilité** : Présente (aria, roles sur une partie des composants), mais **bonus** et non pilier (a11y Storybook en `todo`, pas de politique WCAG claire).
+- **DX** : **Correcte** (docs internes, MSW, Storybook centralisé), mais **terrain miné** sur certains sujets (deux façons d’accéder à l’auth, nombreux fix-* à comprendre, seuils de coverage peut‑être non tenus).
+
+---
+
+### 5 forces réelles
+
+1. **Design system pensé et documenté**  
+   `index.css` : palette sémantique, layout primitives (`max-w-layout-content`, `min-h-layout-main`, etc.), easings, keyframes, dark mode. Les règles du projet interdisent les valeurs arbitraires et imposent ces primitives — même si non respectées partout, la cible est claire.
+
+2. **Storybook-first et MSW bien intégrés**  
+   Preview avec MSW en mode strict (`onUnhandledRequest: 'error'`), décorateur global (Theme, QueryClient, Router, Toast, Audio, Auth, i18n), pas d’import de providers dans les stories. Handlers MSW très complets (~1600 lignes). Environ 324 stories : bonne couverture de surface.
+
+3. **Patterns de chargement et d’erreur explicites**  
+   `LOADING_STATES_PATTERN.md`, composant `LoadingState` (spinner / inline / skeleton / minimal), skeletons dédiés par page (UserProfilePage, CloudFileBrowser, CourseDetailView, etc.). Données servies par React Query avec états loading/error gérés au niveau page.
+
+4. **Optimistic UI et utilitaires métier**  
+   `OPTIMISTIC_UPDATES.md` et `optimisticUpdates.ts` (createOptimisticUpdate, createArrayOptimisticUpdate, createToggleOptimisticUpdate). Utilisation dans playlists, likes, commentaires. Rollback et invalidation documentés.
+
+5. **Surface de tests unitaires et d’intégration**  
+   ~186 fichiers `*.test.tsx` et ~100 `*.test.ts`, intégration auth/playlists/player, Vitest avec coverage (seuils 80 % configurés). E2E Playwright et visuels présents. Base saine pour monter en rigueur.
+
+---
+
+### 5 faiblesses structurelles majeures
+
+1. **Double source de vérité pour l’auth**  
+   `AuthContext` + `useAuth()` (Storybook, ProtectedRoute, quelques pages) vs `authStore` (Zustand) + `useAuthStore()` (App, Sidebar, Login, etc.). `App.tsx` et hydratation utilisent le store ; le décorateur Storybook utilise le Context. Risque de désync, double appel à l’API, et confusion pour tout nouveau dev. Dette d’architecture prioritaire.
+
+2. **Règles de layout systématiquement violées**  
+   La règle “pas de valeurs arbitraires (w-[…], z-[…], etc.)” et “utiliser les layout primitives” est explicite dans `.cursorrules` et `index.css`, mais environ **130 fichiers** utilisent `w-[`, `h-[`, `z-[`, etc. La Sidebar elle‑même utilise `w-64`, `z-[90]`, `z-[95]`, `left-6`, `top-20`. Le design system est sous‑exploité et la cohérence visuelle fragilisée.
+
+3. **Correctifs applicatifs visibles et fragiles**  
+   `main.tsx` et `App.tsx` chargent plusieurs correctifs : `fix-input-focus.css`, `fix-login-form.css`, `fixDisplayIssues`, `fixInputFocus`. Cela indique des problèmes de conception (focus, formulaires) résolus par patch plutôt qu’à la source. Coût de maintenance et risque de régression élevé.
+
+4. **Route config et couplage produit**  
+   `routeConfig.tsx` injecte des callbacks vides dans les éléments de route : `onCreateProduct={() => {}}`, `onNavigateTrack={() => {}}`. La routing ne doit pas porter de callbacks métier ; ces props devraient remonter d’un layout ou d’un contexte. Signe que la frontière entre routing et feature n’est pas claire.
+
+5. **Accessibilité et qualité perçue en option**  
+   Storybook : `a11y: { test: 'todo' }`. Beaucoup de composants ont des `aria-*` ou `role`, mais de façon non systématique (ex. `KodoEmptyState` sans role/aria pour l’état vide, Sidebar sans `role="navigation"` ni `aria-label`). Pas de politique WCAG ni de critères de sortie a11y. L’accessibilité reste un “plus” et non un pilier, ce qui limite la maturité produit et l’inclusivité.
+
+---
+
+## B. Écart avec Discord & Spotify
+
+Tableau comparatif **technique et concret** (pas d’idéalisation).
+
+| Dimension | Discord (référence) | Spotify (référence) | Veza (état actuel) | Écart principal |
+|----------|--------------------|--------------------|--------------------|------------------|
+| **Architecture** | Domains clairs, state par feature, peu de global ; routing découplé du métier. | App shell léger, données par view, cache agressif. | Features + stores globaux + double auth (Context + Store). | Une seule source d’auth ; pas de callbacks dans la route config ; frontière nette layout/feature. |
+| **UX** | Feedback immédiat, états loading/empty/error partout, modales et transitions prévisibles. | Transitions fluides, skeletons systématiques, pas de “trous” visuels. | Skeletons et LoadingState présents mais pas partout ; empty/error variables ; correctifs CSS. | Checklist loading/empty/error par écran ; suppression des fix-* par refonte des composants concernés. |
+| **Performance** | Time to interactive court, lazy lourd, prioritisation du above-the-fold. | Streaming / progressive, cache et préchargement. | Lazy routes OK ; pas de Suspense boundary au niveau route ; pas de stratégie “perçu vs mesuré”. | Suspense + skeletons aux limites de route ; métriques perçues (LCP, INP) et objectifs chiffrés. |
+| **Design** | Cohérence stricte, tokens partout, pas de valeurs en dur. | Design system unique, thème et spacing prévisibles. | Tokens et primitives définis mais ~130 fichiers en arbitraire ; primitives peu utilisées. | Lint (ou rule) qui interdit les arbitraires ; migration progressive vers primitives. |
+| **Sensation de qualité** | App “qui ne bugue pas”, erreurs gracieuses, pas de demi-mesures visibles. | Polish, micro-interactions, pas de formulaires “cassés” en prod. | Correctifs visibles (fix-*), callbacks no-op, incohérences a11y. | Réduire la dette visible : un correctif = une issue de refonte ; zero no-op dans la config. |
+
+En résumé : **Veza a les briques (design system, patterns, tests, Storybook)** mais manque de **rigueur d’exécution** (une seule auth, respect des règles de layout, accessibilité et UX traitées comme non négociables) et de **finition** (plus de polish, moins de patches) pour se rapprocher de Discord/Spotify.
+
+---
+
+### Checklist priorisation performance
+
+À traiter dans cet ordre pour maximiser l’impact ressenti sans tout refactorer :
+
+1. **First meaningful paint**  
+   - Éviter tout JS bloquant avant le premier rendu (splitting par route déjà en place).  
+   - S’assurer que le shell (header + sidebar ou placeholder) + un skeleton de contenu s’affichent sans attendre les données.
+
+2. **Skeletons systématiques**  
+   - Chaque page qui fetch des données doit afficher un skeleton dédié (pas un spinner générique) pendant le chargement.  
+   - Déjà partiellement fait ; compléter les écrans manquants (voir Phase 2).
+
+3. **Optimistic UI pour les actions fréquentes**  
+   - Like, follow, add to playlist, etc. : mise à jour immédiate + rollback si erreur.  
+   - Déjà documenté et utilisé ; étendre aux actions qui n’ont pas encore le pattern.
+
+4. **Réduction des re-renders inutiles**  
+   - Vérifier les composants lourds (listes, tableaux) : memo, sélecteurs Zustand fins, ou découpage pour limiter les sous-arbre qui se re-rendent.  
+   - React Query évite déjà des refetch inutiles si `staleTime` est configuré ; auditer les queryKeys et invalidation pour éviter des cascades.
+
+5. **Métriques et objectifs**  
+   - Mesurer LCP, INP (ou FID), TTI sur les parcours critiques (login, dashboard, lecture).  
+   - Fixer des objectifs (ex. LCP &lt; 2.5 s sur 3G) et un process de revue en cas de régression.
+
+6. **Suspense aux limites de route**  
+   - Envelopper les arbres de route dans `<Suspense fallback={<PageSkeleton />}>` pour que le navigateur puisse afficher le fallback sans attendre tout le bundle enfant.  
+   - Optionnel mais utile dès que le bundle par route grossit.
+
+---
+
+## C. Feuille de route de transformation
+
+### Phase 1 — Fondations (ce qui doit être corrigé avant tout)
+
+**Objectifs**  
+- Une seule source de vérité pour l’auth.  
+- Arrêt des correctifs “magiques” et renforcement du respect du design system.
+
+**Actions concrètes**  
+1. **Unifier l’auth**  
+   - Décider : soit tout sur Zustand (authStore), soit tout sur Context (AuthProvider). Recommandation : **Zustand** (déjà utilisé par App, hydratation, Sidebar).  
+   - Migrer tous les usages de `useAuth()` vers `useAuthStore()` (ou l’inverse si vous choisissez Context).  
+   - Faire du AuthProvider un simple consommateur du store (s’il est gardé pour Storybook/compat).  
+   - Supprimer la duplication et documenter la décision dans un ADR.
+
+2. **Supprimer les callbacks de la route config**  
+   - Retirer `onCreateProduct`, `onNavigateTrack`, etc. des éléments de route.  
+   - Fournir ces comportements via layout (contexte ou props depuis un parent commun) ou navigation programmatique + state.
+
+3. **Remplacer les fix-* par des corrections à la source**  
+   - Pour chaque `fix-input-focus`, `fix-login-form`, etc. : identifier le composant (formulaire, input, focus trap) et corriger le focus, les états et le style dans le composant ou le design system.  
+   - Supprimer les imports de fix-* une fois le comportement correct par défaut.
+
+4. **Lint / règle pour les valeurs arbitraires**  
+   - Règle ESLint (ou plugin Tailwind) interdisant les classes du type `w-[...]`, `h-[...]`, `z-[...]` pour layout/spacing (avec liste d’exceptions si besoin).  
+   - Introduire les exceptions progressivement et traiter les ~130 fichiers par batch (par répertoire ou par feature).
+
+**Risques**  
+- Régression auth si la migration n’est pas testée (E2E login/logout, refresh, Storybook).  
+- Régressions visuelles si on supprime les fix-* sans vérifier tous les écrans.
+
+**Indicateurs de réussite**  
+- Un seul mécanisme d’auth utilisé partout ; plus d’import de fix-* dans `main.tsx`/`App.tsx`.  
+- Aucun callback métier dans `routeConfig.tsx`.  
+- Lint en place et au moins un premier batch (ex. `components/layout`) sans violations.
+
+---
+
+### Phase 2 — Stabilisation et cohérence
+
+**Objectifs**  
+- Loading / empty / error systématiques.  
+- Accessibilité traitée comme exigence, pas comme option.  
+- Design system respecté (primitives, tokens).
+
+**Actions concrètes**  
+1. **Checklist par écran**  
+   - Pour chaque page/feature : état Loading (skeleton dédié ou générique), Empty (KodoEmptyState ou équivalent), Error (ErrorDisplay + retry).  
+   - Documenter la checklist et l’appliquer aux nouvelles features ; remédier les écrans existants sans état manquant.
+
+2. **Accessibilité**  
+   - Remplacer `a11y: { test: 'todo' }` par une config réelle dans Storybook (règles axe-core, seuils).  
+   - Définir un niveau cible (ex. WCAG 2.1 AA) et une liste de composants critiques (formulaires, navigation, player).  
+   - Corriger Sidebar (role="navigation", aria-label), KodoEmptyState (role/aria pour empty state), et autres composants identifiés par un audit axe.
+
+3. **Migration vers layout primitives**  
+   - Remplacer progressivement les valeurs arbitraires par les classes du design system (`max-w-layout-content`, `min-h-layout-main`, etc.) et l’échelle Tailwind.  
+   - Prioriser : layout (Sidebar, Navbar, content), puis composants partagés (modales, cartes).
+
+4. **Optimistic UI et erreurs**  
+   - Vérifier que tous les usages d’optimistic updates ont un rollback et un feedback utilisateur en cas d’échec (toast, réversion visuelle).  
+   - Centraliser la logique d’erreur (ex. `apiToastHelper`, ErrorDisplay) pour éviter des traitements ad hoc.
+
+**Risques**  
+- Scope trop large si on veut tout migrer d’un coup ; prioriser par trafic ou par criticité.
+
+**Indicateurs de réussite**  
+- Chaque écran couvert par la checklist loading/empty/error.  
+- Storybook a11y activé et 0 violation sur les stories des composants critiques.  
+- Réduction mesurée du nombre de violations “arbitraires” (objectif chiffré par sprint).
+
+---
+
+### Phase 3 — Polish et excellence perçue
+
+**Objectifs**  
+- Transitions et micro-interactions cohérentes.  
+- Performance perçue (skeleton, priorisation) et mesurée (LCP, INP).  
+- Réduction des “petits bugs” visuels et comportementaux.
+
+**Actions concrètes**  
+1. **Suspense et streaming**  
+   - Définir des Suspense boundaries au niveau des routes (ou des sous-arbres) avec fallback skeleton.  
+   - Vérifier que le premier paint utile (header + skeleton contenu) est rapide.
+
+2. **Métriques et objectifs**  
+   - Suivre LCP, INP (ou FID), TTI.  
+   - Définir des objectifs (ex. LCP < 2.5 s sur 3G) et un process de revue si dégradation.
+
+3. **Micro-interactions**  
+   - Utiliser les variables déjà définies (`--duration-fast`, `--ease-out`, etc.) partout où c’est pertinent (hover, focus, modales).  
+   - Passer en revue les CTA et les listes interactives pour un feedback immédiat (disabled + spinner ou état “loading” sur le bouton).
+
+4. **Nettoyage produit**  
+   - Supprimer ou documenter tout code mort et composants non utilisés.  
+   - S’assurer qu’aucun no-op ou placeholder visible ne reste dans les parcours principaux.
+
+**Risques**  
+- Sur-optimisation sans mesure ; garder les métriques comme garde-fou.
+
+**Indicateurs de réussite**  
+- LCP/INP dans la cible sur les parcours critiques.  
+- Pas de régression a11y ; design system respecté sur les nouvelles livraisons.
+
+---
+
+### Phase 4 — Scalabilité et long terme
+
+**Objectifs**  
+- Code prêt pour 10× fonctionnalités et 10× équipe.  
+- Dette technique visible et pilotée.  
+- Expérimentations (A/B, feature flags) sans tout casser.
+
+**Actions concrètes**  
+1. **Frontières de domaines**  
+   - Clarifier ce qui vit dans `features/` vs `components/` (ex. pas de duplication forms auth dans les deux).  
+   - Règle simple : composants réutilisables et design system dans `components/` ; logique métier et pages dans `features/`.
+
+2. **State et données**  
+   - Documenter quand utiliser React Query vs Zustand (server state vs client state).  
+   - Éviter de dupliquer des données serveur dans des stores globaux (library, etc.) sans stratégie d’invalidation claire.
+
+3. **Feature flags et expérimentations**  
+   - Introduire un mécanisme léger de feature flags (build-time ou runtime) pour découpler déploiement et activation.  
+   - Tester une feature derrière flag sans impacter les parcours principaux.
+
+4. **Documentation et onboarding**  
+   - Un README frontend à jour (structure, auth unique, design system, comment lancer Storybook et tests).  
+   - Créer ou mettre à jour `docs/STORYBOOK_CONTRACT.md` (référencé dans le code) : états requis (Loading, Error, Empty), pas de providers dans les stories, MSW pour l’API.
+
+**Risques**  
+- Refactors trop larges ; privilégier des incréments et des ADR pour les décisions d’architecture.
+
+**Indicateurs de réussite**  
+- Nouveau dev opérationnel (première feature livrée) en un temps cible (ex. &lt; 2 jours).  
+- Dette listée et priorisée (ex. backlog “dette” avec critères de sortie).
+
+---
+
+## D. Recommandations non évidentes
+
+- **Ne pas “nettoyer” tout le code arbitraire d’un coup.**  
+  Une équipe junior aurait tendance à tout remplacer en un big bang. Mieux vaut : lint qui bloque en *nouveau* code, et migration par zones (layout d’abord, puis composants partagés). Les 130 fichiers se traitent par lots avec revue visuelle et régression.
+
+- **Traiter l’auth comme un projet de migration, pas comme une tâche.**  
+  Faire un inventaire exhaustif (grep `useAuth` / `useAuthStore`), un plan de migration (ordre des fichiers), des tests E2E et Storybook qui valident login/logout/refresh, puis migrer avec une PR par zone. Un “quick fix” (tout basculer d’un coup) sans tests est risqué.
+
+- **Ne pas activer a11y dans Storybook sans budget de correction.**  
+  Activer axe avec des règles strictes du jour au lendemain va faire exploser les “failed”. Mieux : activer sur un sous-ensemble de stories (ex. composants ui/ + layout), corriger ces stories, puis élargir. a11y doit devenir un critère de merge sur les composants critiques.
+
+- **Documenter pourquoi chaque fix-* existe.**  
+  Avant de les supprimer, ajouter un commentaire ou un petit doc : “fix-login-form existe parce que …”. Cela évite de recréer le même patch plus tard et guide la refonte (quel composant doit prendre en charge le focus, etc.).
+
+- **Mettre des indicateurs de “maturité” par feature.**  
+  Une grille simple (loading / empty / error / a11y / tests / Storybook) par feature ou page. Permet de prioriser les remédiations et de ne pas prétendre que “tout est à niveau” alors que certaines zones sont encore fragiles.
+
+- **Réserver du temps “dette” dans chaque sprint.**  
+  Un projet “correct” reporte la dette ; un projet qui vise l’excellence en consacre une part fixe (ex. 20 %). Chaque sprint : X violations arbitraires en moins, Y écrans avec checklist complète, Z stories avec a11y passante.
+
+- **Éviter d’ajouter de nouveaux stores globaux “au fil de l’eau”.**  
+  Vous avez déjà auth, ui, library, cart, chat. Avant d’en ajouter un nouveau : vérifier si React Query + état local (ou store de feature) ne suffit pas. Les stores globaux multiplient les sources de vérité et compliquent le debugging et la cohérence.
+
+---
+
+## Synthèse
+
+- **Niveau actuel** : Intermédiaire à senior (6/10), avec de vraies bases (design system, patterns, MSW, tests, Storybook) et des faiblesses structurelles (double auth, violations de layout, correctifs, a11y en option).
+- **Écart Discord/Spotify** : Moins une question de stack que de **rigueur d’exécution** (une auth, respect des règles, a11y et UX non négociables) et de **finition** (moins de patches, plus de polish).
+- **Ordre recommandé** : Fondations (auth, route config, fix-*, lint) → Stabilisation (checklist loading/empty/error, a11y, primitives) → Polish (Suspense, métriques, micro-interactions) → Scalabilité (frontières, state, flags, doc).
+- **Ton** : Exigeant mais réaliste : le projet peut viser un niveau “world-class” à condition de traiter la dette identifiée comme un plan structuré et de ne pas ajouter de nouvelle dette sur l’auth et le layout.
--- a/apps/web/README.md
+++ b/apps/web/README.md
@ -96,6 +96,8 @@ npm run validate:all
 ### Code Quality
 - `npm run lint` - Run ESLint
 - `npm run lint:fix` - Fix ESLint issues
+- `npm run lint:ui` - Run ESLint on `src/components` and `src/features` only
+- `npm run report:arbitrary` - Report Tailwind arbitrary values (w-[...], gap-[...], etc.) for migration
 - `npm run typecheck` - Type check without emitting files
 - `npm run fmt` - Format code with Prettier

@ -127,14 +129,14 @@ apps/web/

 ## Design System

-The application uses the Kodo design system:
+The application uses the Kodo design system. **Single source of truth** for layout, spacing, shadows, and transitions: `docs/DESIGN_TOKENS.md`. Shell layout: `docs/APP_SHELL.md`.

 - **Colors**: Kodo color palette (see `src/styles/COLOR_USAGE.md`)
 - **Components**: Design system components in `src/components/ui/`
- **Typography**: Type scale system (see `src/styles/TYPOGRAPHY_GUIDE.md`)
- **Spacing**: Spacing scale system (see `src/styles/SPACING_GUIDE.md`)
+- **Typography**: Type scale and hierarchy (see `docs/DESIGN_TOKENS.md`, `src/styles/TYPOGRAPHY_GUIDE.md`)
+- **Spacing**: Spacing scale (see `docs/SPACING_GUIDE.md`) — no arbitrary values (e.g. `w-[300px]`, `gap-[7px]`) without justification.

-See `src/components/COMPONENT_USAGE.md` for component usage guidelines.
+**Visual regression**: `npm run visual:capture`, `npm run visual:compare`, `npm run visual:update` (see `visual-tests/README.md`). **Arbitrary values report**: `npm run report:arbitrary` to list Tailwind arbitrary patterns for migration. **New full-layout page**: see `docs/FULL_LAYOUT_PAGE.md`.

 ## ESLint Rules

--- a/apps/web/docs/APP_SHELL.md
+++ b/apps/web/docs/APP_SHELL.md
@ -0,0 +1,68 @@
+# App Shell — Référence
+
+Vue d’ensemble du shell applicatif (layout principal) et des tokens CSS associés. Toute évolution du shell (sidebar, header, main, player) doit s’appuyer sur ces variables et classes pour rester cohérente.
+
+## Rôle du shell
+
+- **Sidebar** : navigation fixe à gauche (largeur pilotée par `--sidebar-width-expanded` / `--sidebar-width-collapsed`). Voir [index.css](../src/index.css) section "Sidebar layout".
+- **Header** : barre fixe en haut (hauteur `--header-height`), dont le bord gauche suit la sidebar (expanded/collapsed).
+- **Main** : zone scrollable (contenu des pages). Marges gauche pilotées par l’état de la sidebar ; padding top/bottom pour ne pas passer sous le header ni le player.
+- **Player** : barre de lecture fixe en bas (rendue par `GlobalPlayer` dans `DashboardLayout`).
+
+Fichiers principaux :
+
+- [DashboardLayout.tsx](../src/components/layout/DashboardLayout.tsx) — assemblage Sidebar, zone main, Header, GlobalPlayer.
+- [Header.tsx](../src/components/layout/Header.tsx) — barre supérieure (recherche, actions, user menu).
+
+## Variables CSS (shell)
+
+Définies dans `:root` dans [index.css](../src/index.css), section "App shell" :
+
+| Variable | Valeur | Rôle |
+|----------|--------|------|
+| `--header-height` | 4rem | Hauteur de la barre header fixe |
+| `--main-offset-top` | 5rem | Padding-top du `<main>` (dégager le header) |
+| `--main-offset-bottom` | 8rem | Padding-bottom du `<main>` (réserve pour le player) |
+| `--main-margin-left-expanded` | 18rem | Marge gauche du conteneur main quand sidebar ouverte (15rem sidebar + 3rem gap) |
+| `--main-margin-left-collapsed` | 7rem | Marge gauche du main quand sidebar fermée (5rem + 2rem gap) |
+| `--header-left-expanded` | 18rem | Position `left` de la barre header quand sidebar ouverte |
+| `--header-left-collapsed` | 5rem | Position `left` de la barre header quand sidebar fermée |
+
+Les largeurs sidebar sont définies à part : `--sidebar-width-expanded` (15rem), `--sidebar-width-collapsed` (5rem). Pour garder la cohérence, ne pas modifier les marges main/header sans ajuster ces tokens de façon cohérente.
+
+## Classes utilitaires (shell)
+
+Définies dans [index.css](../src/index.css) après les classes sidebar (`.left-sidebar`, `.z-sidebar`, etc.) :
+
+| Classe | Propriété | Usage |
+|--------|-----------|--------|
+| `.h-header` | height | Barre header et div interne du header |
+| `.pt-main` | padding-top | Élément `<main>` |
+| `.pb-main` | padding-bottom | Élément `<main>` |
+| `.ml-main-expanded` | margin-left | Conteneur principal (avec préfixe `lg:`) quand sidebar ouverte |
+| `.ml-main-collapsed` | margin-left | Conteneur principal (avec `lg:`) quand sidebar fermée |
+| `.left-header-expanded` | left | Barre header quand sidebar ouverte |
+| `.left-header-collapsed` | left | Barre header quand sidebar fermée |
+
+À utiliser avec le préfixe responsive `lg:` pour les marges/positions desktop (ex. `lg:ml-main-expanded`). En dessous de `lg`, la sidebar est en overlay et le main utilise `ml-0`, le header `left-0` (`max-lg:left-0`).
+
+## Comportement responsive
+
+- **lg (1024px et plus)** : sidebar fixe à gauche, main et header utilisent les classes tokenisées (expanded/collapsed selon `sidebarOpen`).
+- **En dessous de lg** : sidebar en overlay (ouverte/fermée par toggle), conteneur main en pleine largeur (`ml-0`), header en pleine largeur (`max-lg:left-0`).
+
+## Breakpoints et viewports de test
+
+| Breakpoint | Largeur | Comportement attendu |
+|------------|---------|----------------------|
+| Mobile | 320px | Sidebar overlay, main pleine largeur, header pleine largeur. |
+| Tablet | 768px | Idem (sidebar overlay jusqu’à lg). |
+| Desktop | 1024px (lg) | Sidebar fixe, main et header avec marges/positions tokenisées. |
+| Large desktop | 1280px | Même comportement que lg, contenu limité par `max-w-layout-content` si applicable. |
+
+Vérifier visuellement (ou via tests Playwright) que Sidebar, Header et Main se comportent correctement sur ces largeurs.
+
+## Référence croisée
+
+- Tokens sidebar (largeurs, offsets, z-index) : [index.css](../src/index.css) — "Sidebar layout" et classes `.w-sidebar-expanded`, `.left-sidebar`, `.top-sidebar`, `.bottom-sidebar`, `.z-sidebar`, `.z-sidebar-overlay`.
+- Layout primitives (max-width contenu, min-height pages) : mêmes variables `--layout-content-max-width`, `--layout-page-min-height`, etc. Le `<main>` contient un wrapper `max-w-layout-content` pour le contenu.
--- a/apps/web/docs/DESIGN_TOKENS.md
+++ b/apps/web/docs/DESIGN_TOKENS.md
@ -0,0 +1,109 @@
+# Design Tokens — Référence
+
+Source de vérité pour les tokens du design system Veza/Kodo. Toute valeur d’espacement, couleur, ombre, typographie ou transition doit s’appuyer sur ces tokens ou sur l’échelle Tailwind documentée ici.
+
+## 1. Espacements (layout et sections)
+
+Définis dans [index.css](../src/index.css) (`:root`) et [design-tokens.css](../src/styles/design-tokens.css) (scale Tailwind).
+
+| Variable | Valeur | Rôle |
+|----------|--------|------|
+| `--layout-gap` | 1rem (16px) | Gap par défaut entre sections (align Tailwind gap-4) |
+| `--layout-gap-sm` | 0.75rem (12px) | Gap serré (gap-3) |
+| `--layout-gap-lg` | 1.5rem (24px) | Gap large (gap-6) |
+
+Scale complète (4px base) : voir [SPACING_GUIDE.md](SPACING_GUIDE.md) et `design-tokens.css` (`--spacing-0` à `--spacing-96`). Utiliser les classes Tailwind `gap-*`, `p-*`, `m-*`, `space-*` de préférence aux valeurs arbitraires.
+
+## 2. Couleurs
+
+- **Kodo (primaire)** : [index.css](../src/index.css) — `--background`, `--foreground`, `--primary`, `--muted`, `--border`, etc.
+- **Sidebar** : `--sidebar`, `--sidebar-foreground`, `--sidebar-primary`, etc. (index.css).
+- **Mapping et usage** : [src/styles/COLOR_USAGE.md](../src/styles/COLOR_USAGE.md).
+
+Ne pas utiliser les couleurs par défaut Tailwind (slate, gray, zinc, etc.) ; privilégier les tokens Kodo (kodo-void, kodo-cyan, etc.).
+
+## 3. Typographie
+
+Échelle Tailwind utilisée (tailles de texte) :
+
+| Classe | Taille (rem) | Usage |
+|--------|--------------|--------|
+| `text-xs` | 0.75rem | Caption, labels secondaires |
+| `text-sm` | 0.875rem | Labels, métadonnées |
+| `text-base` | 1rem | Corps de texte |
+| `text-lg` | 1.125rem | Sous-titres |
+| `text-xl` | 1.25rem | Titres de section |
+| `text-2xl` | 1.5rem | Titres de page |
+| `text-3xl` | 1.875rem | Titres principaux |
+| `text-4xl` | 2.25rem | Hero / titres très visibles |
+
+Line-height et font-weight : suivre les utilitaires Tailwind (`leading-*`, `font-normal`, `font-medium`, `font-semibold`, `font-bold`). Ne pas utiliser de tailles arbitraires (`text-[14px]`, etc.) sauf exception documentée (ex. SVG charts).
+
+### Hiérarchie visuelle (usage recommandé)
+
+| Rôle | Classe | Contexte |
+|------|--------|----------|
+| Titre de page | `text-2xl` ou `text-3xl` + `font-bold` | H1 de la page (Dashboard, Playlists, etc.) |
+| Sous-titre / section | `text-lg` ou `text-xl` | Titres de blocs |
+| Label / métadonnée | `text-sm` | Labels de champs, infos secondaires |
+| Corps | `text-base` | Texte courant |
+| Caption / timestamps | `text-xs` | Légendes, durées, timestamps |
+
+Contraste : privilégier `text-foreground` pour l’info principale et `text-muted-foreground` pour l’info secondaire (style Spotify : titre + artiste, description en gris).
+
+## 4. Ombres
+
+Définies dans [design-system.css](../src/styles/design-system.css).
+
+| Variable | Rôle |
+|----------|------|
+| `--shadow-sm` | Ombres légères |
+| `--shadow-md` | Ombres moyennes, tooltips |
+| `--shadow-lg` | Cartes surélevées |
+| `--shadow-xl` | Modales |
+| `--shadow-soft` | Ombres douces |
+| `--shadow-card` | Cartes (alias `--shadow-soft`) |
+| `--shadow-modal` | Modales (alias `--shadow-xl`) |
+| `--shadow-tooltip` | Tooltips (alias `--shadow-md`) |
+
+Classes utilitaires dans index.css : `.shadow-card`, `.shadow-modal`, `.shadow-tooltip`, `.shadow-card-hover`, `.shadow-card-glow-cyan`, `.shadow-card-glow-magenta`. Tokens additionnels : `--sidebar-active-indicator`, `--button-primary-glow`, `--button-primary-glow-hover`, `--player-thumb-glow`, `--player-hover-glow`, `--queue-item-current-glow`, `--slider-thumb-glow`, `--status-dot-glow-cyan`, `--status-dot-glow-lime`, `--status-dot-glow-magenta` (design-system.css) avec classes `.sidebar-active-indicator`, `.shadow-button-primary-glow`, `.shadow-button-primary-glow-hover`, `.shadow-player-thumb`, `.shadow-player-hover`, `.shadow-queue-item-current`, `.shadow-slider-thumb`, `.shadow-status-dot-cyan`, `.shadow-status-dot-lime`, `.shadow-status-dot-magenta`. Couverture / hero : `--shadow-cover-depth` (`.shadow-cover-depth`). Gaming / XP : `--shadow-gold-glow` (`.shadow-gold-glow`). FAB : `--shadow-fab-glow`, `--shadow-fab-glow-hover` (`.shadow-fab-glow`, `.shadow-fab-glow-hover`).
+
+## 5. Layout shell (sidebar, header, main)
+
+Définis dans [index.css](../src/index.css). Référence complète : [APP_SHELL.md](APP_SHELL.md).
+
+- **Sidebar** : `--sidebar-width-expanded`, `--sidebar-width-collapsed`, `--sidebar-offset-*`, `--sidebar-z-index`.
+- **Header** : `--header-height`, `--header-left-expanded`, `--header-left-collapsed`.
+- **Main** : `--main-offset-top`, `--main-offset-bottom`, `--main-margin-left-expanded`, `--main-margin-left-collapsed`.
+- **Max heights (drawers, panels, lists)** : `--layout-drawer-max-height` (60vh), `--layout-panel-max-height` (70vh), `--layout-list-max-height` (25rem) — classes `.max-h-layout-drawer`, `.max-h-layout-panel`, `.max-h-layout-list`.
+
+Ne pas définir de variables concurrentes (ex. `--sidebar-width`, `--header-height`) ailleurs ; index.css est la source unique pour le shell.
+
+## 6. Transitions et animations
+
+Définies dans [design-system.css](../src/styles/design-system.css).
+
+| Variable | Valeur | Usage |
+|----------|--------|--------|
+| `--duration-instant` | 100ms | Feedback immédiat |
+| `--duration-fast` | 150ms | Hover, focus |
+| `--duration-normal` | 250ms | Sidebar, modales |
+| `--duration-immersive` | 200ms | Micro-interactions (hover, focus) |
+| `--duration-slow` | 400ms | Animations visibles |
+| `--duration-slower` | 600ms | Transitions longues |
+| `--ease-out` | cubic-bezier(0.33, 1, 0.68, 1) | Sortie |
+| `--ease-in-out` | cubic-bezier(0.65, 0, 0.35, 1) | Entrée/sortie |
+| `--ease-bounce` | cubic-bezier(0.34, 1.56, 0.64, 1) | Rebond |
+| `--ease-spring` | cubic-bezier(0.175, 0.885, 0.32, 1.275) | Spring |
+
+Utiliser ces variables dans les transitions (ex. `transition-all var(--duration-normal) var(--ease-out)`).
+
+## 7. Exceptions (valeurs arbitraires)
+
+Les règles ESLint interdisent les classes arbitraires pour `w-[...]`, `h-[...]`, `rounded-[...]`, `shadow-[...]`, etc. Exceptions autorisées avec commentaire `eslint-disable` :
+
+- SVG ou canvas (ex. `text-[2px]` pour axes de graphiques).
+- Composants tiers dont on ne contrôle pas le markup.
+- Cas documentés dans ce fichier ou en PR avec justification.
+
+Voir aussi : [.cursorrules](../.cursorrules) (layout primitives, pas de valeurs arbitraires pour espacements/tailles).
--- a/apps/web/docs/FULL_LAYOUT_PAGE.md
+++ b/apps/web/docs/FULL_LAYOUT_PAGE.md
@ -0,0 +1,61 @@
+# Comment ajouter une nouvelle page full layout
+
+Ce document décrit comment ajouter une nouvelle page principale dans le shell (DashboardLayout) et sa story full layout dans Storybook.
+
+## Prérequis
+
+- La page doit être rendue dans le même shell que Dashboard, Playlists, Library, Settings, Profile : **DashboardLayout** (voir [APP_SHELL.md](APP_SHELL.md)).
+- Les routes protégées utilisent `wrapProtected` dans [routeConfig.tsx](../src/router/routeConfig.tsx), qui enveloppe le contenu avec `ProtectedLayoutRoute` → `DashboardLayout`.
+
+## Étapes
+
+### 1. Route
+
+Dans [routeConfig.tsx](../src/router/routeConfig.tsx) :
+
+- Importer (lazy) le composant de page depuis `LazyComponent` ou l’ajouter dans [lazy-component/lazyExports.ts](../src/components/ui/lazy-component/lazyExports.ts).
+- Ajouter une entrée dans `getProtectedRoutes()` :  
+  `{ path: '/votre-page', element: wrapProtected(<LazyVotrePage />) }`.
+
+### 2. Story full layout
+
+Dans [DashboardLayout.stories.tsx](../src/components/layout/DashboardLayout.stories.tsx) :
+
+- Importer la page :  
+  `import { VotrePage } from '@/features/...';`
+- Ajouter une story sur le même modèle que `LibraryFullLayout` ou `SettingsFullLayout` :
+
+```tsx
+export const VotrePageFullLayout: Story = {
+  name: 'Votre page – full layout',
+  render: () => (
+    <DashboardLayout>
+      <VotrePage />
+    </DashboardLayout>
+  ),
+  parameters: {
+    layout: 'fullscreen',
+    router: { initialEntries: ['/votre-page'] },
+  },
+};
+```
+
+### 3. MSW (handlers)
+
+Si la page charge des données via l’API, ajouter ou réutiliser les handlers dans [handlers.ts](../src/mocks/handlers.ts) pour éviter un loading infini dans Storybook (ex. `http.get('*/api/v1/votre-resource', ...)`).
+
+### 4. Viewport
+
+Les stories full layout utilisent le viewport par défaut du meta (desktop). Les captures visuelles Playwright utilisent 1280×720 (voir [visual-tests/README.md](../visual-tests/README.md)). Aucune config supplémentaire n’est nécessaire pour une nouvelle story.
+
+### 5. Validation visuelle (optionnel)
+
+Pour inclure la page dans la régression visuelle :
+
+- Ajouter une entrée dans `SCREENS` dans [e2e/visual-complete.spec.ts](../e2e/visual-complete.spec.ts) si vous voulez une capture full page (ex. `{ name: 'votre-page', url: '/votre-page', auth: true, full: true }`).
+- Lancer `npm run visual:capture` puis `npm run visual:compare` ; si les changements sont validés, `npm run visual:update` et committer les baselines.
+
+## Règles UI
+
+- Pas de valeurs arbitraires (w-[...], h-[...], gap-[...], etc.) : utiliser l’échelle Tailwind ou les tokens (voir [DESIGN_TOKENS.md](DESIGN_TOKENS.md)).
+- Espacements et typo : respecter [SPACING_GUIDE.md](SPACING_GUIDE.md) et la hiérarchie dans DESIGN_TOKENS.md.
--- a/apps/web/e2e/tests/visual/sidebar.spec.ts
+++ b/apps/web/e2e/tests/visual/sidebar.spec.ts
@ -0,0 +1,30 @@
+import { test, expect } from '@playwright/test';
+
+test.describe('Visual Regression - Sidebar', () => {
+    test('should match design tokens implementation', async ({ page }) => {
+        // Visit the Storybook iframe directly for isolation
+        // ID derived from title: 'App/Layouts/Sidebar' -> 'app-layouts-sidebar'
+        await page.goto('http://localhost:6006/iframe.html?id=app-layouts-sidebar--default&viewMode=story');
+
+        // Wait for component to be stable
+        await page.waitForSelector('aside');
+
+        // Take snapshot of the entire customized layout (Side bar is fixed position in the story)
+        // We target the aside element directly for the component snapshot
+        const sidebar = page.locator('aside');
+        await expect(sidebar).toBeVisible();
+
+        // Initial State Snapshot
+        await expect(sidebar).toHaveScreenshot('sidebar-default.png');
+
+        // Interaction Test: Hover over an item
+        const studioItem = page.getByText('Cloud Files');
+        await studioItem.hover();
+
+        // Allow animation to complete (transition duration-200)
+        await page.waitForTimeout(300);
+
+        // Hover State Snapshot
+        await expect(sidebar).toHaveScreenshot('sidebar-hover-item.png');
+    });
+});
--- a/apps/web/e2e/visual-complete.spec.ts
+++ b/apps/web/e2e/visual-complete.spec.ts
@ -0,0 +1,171 @@
+/**
+ * Suite complète de capture visuelle pour régression pixel-perfect.
+ *
+ * - Boucle sur URLs critiques (Login, Dashboard, Playlists, etc.)
+ * - Auth via storageState pour pages protégées ; pas d'auth pour login/register
+ * - Full page + screenshots ciblés (Sidebar, Player, Header)
+ * - waitForStableNetwork, masquage éléments dynamiques (dates, avatars)
+ * - Nommage : {screen-name}-desktop-dark.png
+ *
+ * Sortie : visual-tests/current/ (visual:capture) ou visual-tests/baselines/ (visual:update)
+ */
+
+import { test } from '@playwright/test';
+import fs from 'fs';
+import path from 'path';
+import { visualOutputDir, screenshotName } from '../playwright.config.visual';
+
+const BASE_URL = process.env.PLAYWRIGHT_BASE_URL || process.env.VITE_FRONTEND_URL || 'http://localhost:5173';
+const ANIMATION_SETTLE_MS = 800;
+const NETWORK_IDLE_MS = 500;
+
+/** Désactive les animations/transitions CSS pour captures stables */
+async function disableAnimations(page: import('@playwright/test').Page) {
+  await page.addStyleTag({
+    content: `
+      *, *::before, *::after {
+        animation-duration: 0s !important;
+        animation-delay: 0s !important;
+        transition-duration: 0s !important;
+        transition-delay: 0s !important;
+      }
+    `,
+  });
+}
+
+/** Force le thème sombre sur le document */
+async function ensureDarkTheme(page: import('@playwright/test').Page) {
+  await page.evaluate(() => {
+    document.documentElement.classList.add('dark');
+    document.documentElement.setAttribute('data-theme', 'dark');
+  });
+  await page.waitForTimeout(100);
+}
+
+/** Attend réseau inactif puis un court délai pour éviter skeletons / images en cours de chargement */
+async function waitForStableNetwork(page: import('@playwright/test').Page) {
+  await page.waitForLoadState('networkidle', { timeout: 15000 }).catch(() => {});
+  await page.waitForTimeout(NETWORK_IDLE_MS);
+}
+
+/** Locators des éléments dynamiques à masquer (dates, avatars, temps) */
+async function getDynamicMasks(page: import('@playwright/test').Page): Promise<import('@playwright/test').Locator[]> {
+  const candidates = [
+    page.locator('img[alt="Avatar"], img[alt*="avatar"]').first(),
+    page.locator('[role="timer"]').first(),
+    page.locator('time').first(),
+  ];
+  const out: import('@playwright/test').Locator[] = [];
+  for (const loc of candidates) {
+    if ((await loc.count()) > 0) out.push(loc);
+  }
+  return out;
+}
+
+/** Écrit un screenshot dans visual-tests/current ou baselines */
+async function saveScreenshot(
+  page: import('@playwright/test').Page,
+  name: string,
+  options: { fullPage?: boolean; locator?: import('@playwright/test').Locator } = {}
+) {
+  fs.mkdirSync(visualOutputDir, { recursive: true });
+  const filePath = path.join(visualOutputDir, screenshotName(name));
+  const mask = await getDynamicMasks(page);
+  const screenshotOpts = { path: filePath, mask: mask.length > 0 ? mask : undefined };
+
+  if (options.locator) {
+    await options.locator.screenshot(screenshotOpts);
+  } else {
+    await page.screenshot({ fullPage: options.fullPage ?? true, ...screenshotOpts });
+  }
+  test.info().attach(name, { path: filePath, contentType: 'image/png' });
+}
+
+const SCREENS: Array<{
+  name: string;
+  url: string;
+  auth: boolean;
+  full: boolean;
+  locator?: string;
+}> = [
+  { name: 'login', url: '/login', auth: false, full: true },
+  { name: 'register', url: '/register', auth: false, full: true },
+  { name: 'dashboard', url: '/dashboard', auth: true, full: true },
+  { name: 'playlists', url: '/playlists', auth: true, full: true },
+  { name: 'library', url: '/library', auth: true, full: true },
+  { name: '404', url: '/non-existent-route-404', auth: false, full: true },
+];
+
+const COMPONENT_CAPTURES: Array<{ name: string; url: string; locator: string }> = [
+  { name: 'sidebar', url: '/dashboard', locator: '[data-testid="app-sidebar"]' },
+  { name: 'header', url: '/dashboard', locator: 'header' },
+  { name: 'player', url: '/dashboard', locator: '[data-testid="global-player"]' },
+];
+
+test.describe('Visual capture (complete)', () => {
+  test.beforeEach(async ({ page }) => {
+    await page.emulateMedia({ reducedMotion: 'reduce', colorScheme: 'dark' });
+  });
+
+  test.describe('Full-page screens (no auth)', () => {
+    test.use({ storageState: { cookies: [], origins: [] } });
+    for (const screen of SCREENS.filter((s) => !s.auth)) {
+      test(`${screen.name}`, async ({ page }) => {
+        const url = BASE_URL.replace(/\/$/, '') + screen.url;
+        await page.goto(url, { waitUntil: 'domcontentloaded', timeout: 20000 });
+        await waitForStableNetwork(page);
+        await page.waitForSelector('body', { timeout: 8000 }).catch(() => {});
+
+        await disableAnimations(page);
+        await ensureDarkTheme(page);
+        await page.waitForTimeout(ANIMATION_SETTLE_MS);
+
+        await saveScreenshot(page, screen.name, { fullPage: true });
+      });
+    }
+  });
+
+  test.describe('Full-page screens (authenticated)', () => {
+    for (const screen of SCREENS.filter((s) => s.auth)) {
+      test(`${screen.name}`, async ({ page }) => {
+        const url = BASE_URL.replace(/\/$/, '') + screen.url;
+        await page.goto(url, { waitUntil: 'domcontentloaded', timeout: 20000 });
+        await waitForStableNetwork(page);
+        await page.waitForSelector('body', { timeout: 8000 }).catch(() => {});
+
+        await disableAnimations(page);
+        await ensureDarkTheme(page);
+        await page.waitForTimeout(ANIMATION_SETTLE_MS);
+
+        await saveScreenshot(page, screen.name, { fullPage: true });
+      });
+    }
+  });
+
+  test.describe('Component screenshots (authenticated)', () => {
+    for (const comp of COMPONENT_CAPTURES) {
+      test(comp.name, async ({ page }) => {
+        const url = BASE_URL.replace(/\/$/, '') + comp.url;
+        await page.goto(url, { waitUntil: 'domcontentloaded', timeout: 20000 });
+        await waitForStableNetwork(page);
+
+        const loc = page.locator(comp.locator).first();
+        const visible = await loc.waitFor({ state: 'visible', timeout: 10000 }).then(() => true).catch(() => false);
+        if (!visible) {
+          test.skip(true, `${comp.name} locator not visible`);
+          return;
+        }
+
+        await disableAnimations(page);
+        await ensureDarkTheme(page);
+        await page.waitForTimeout(ANIMATION_SETTLE_MS);
+
+        const mask = await getDynamicMasks(page);
+        fs.mkdirSync(visualOutputDir, { recursive: true });
+        const filePath = path.join(visualOutputDir, screenshotName(comp.name));
+        await loc.screenshot({ path: filePath, mask: mask.length > 0 ? mask : undefined });
+        test.info().attach(comp.name, { path: filePath, contentType: 'image/png' });
+      });
+    }
+  });
+});
--- a/apps/web/eslint.config.js
+++ b/apps/web/eslint.config.js
@ -206,6 +206,34 @@ export default [js.configs.recommended, {
        message:
          'Use the Button component from @/components/ui/button instead of native <button> elements. This ensures consistent styling, accessibility, and design system compliance. For exceptions (e.g., test files, third-party components), add eslint-disable comment.',
      },
+      // Width: Avoid arbitrary width classes — use layout tokens or scale (w-4, max-w-layout-content, etc.)
+      {
+        selector:
+          "Literal[value=/.*(w-|min-w-|max-w-)\\[[^]]+\\].*/], TemplateElement[value.raw=/.*(w-|min-w-|max-w-)\\[[^]]+\\].*/]",
+        message:
+          'Avoid arbitrary width classes (w-[...], min-w-[...], max-w-[...]). Use scale (w-4, min-w-80) or layout tokens (max-w-layout-content). See docs/DESIGN_TOKENS.md. For exceptions (e.g. SVG), add eslint-disable.',
+      },
+      // Height: Avoid arbitrary height classes
+      {
+        selector:
+          "Literal[value=/.*(h-|min-h-|max-h-)\\[[^]]+\\].*/], TemplateElement[value.raw=/.*(h-|min-h-|max-h-)\\[[^]]+\\].*/]",
+        message:
+          'Avoid arbitrary height classes (h-[...], min-h-[...], max-h-[...]). Use scale (h-4, min-h-8) or layout tokens. See docs/DESIGN_TOKENS.md. For exceptions, add eslint-disable.',
+      },
+      // Rounded: Avoid arbitrary rounded — use rounded, rounded-lg, rounded-xl, rounded-full or var(--radius-xl)
+      {
+        selector:
+          "Literal[value=/.*rounded-\\[[^]]+\\].*/], TemplateElement[value.raw=/.*rounded-\\[[^]]+\\].*/]",
+        message:
+          'Avoid arbitrary rounded classes (rounded-[...]). Use rounded, rounded-lg, rounded-xl, rounded-full or rounded-[var(--radius-xl)]. See docs/DESIGN_TOKENS.md.',
+      },
+      // Shadow: Avoid arbitrary shadow — use tokens (shadow-card, shadow-modal, shadow-lg, etc.)
+      {
+        selector:
+          "Literal[value=/.*shadow-\\[[^]]+\\].*/], TemplateElement[value.raw=/.*shadow-\\[[^]]+\\].*/]",
+        message:
+          'Avoid arbitrary shadow classes (shadow-[...]). Use design tokens (shadow-card, shadow-modal, shadow-button-primary-glow) or Tailwind shadow-lg, shadow-xl. See docs/DESIGN_TOKENS.md. For exceptions, add eslint-disable.',
+      },
    ],
  },
  settings: {
--- a/apps/web/package.json
+++ b/apps/web/package.json
@ -18,8 +18,15 @@
    "test:visual": "playwright test --config=playwright.config.visual.ts",
    "test:visual:update": "playwright test --config=playwright.config.visual.ts --update-snapshots",
    "test:visual:report": "playwright show-report e2e/playwright-report-visual",
+    "visual:capture": "playwright test --config=playwright.config.visual.ts",
+    "visual:update": "cross-env VISUAL_UPDATE_BASELINES=1 playwright test --config=playwright.config.visual.ts",
+    "visual:baseline": "node scripts/capture-visual-baseline.mjs --baseline",
+    "visual:compare": "node scripts/generate-visual-report.mjs",
+    "visual:test": "playwright test --config=playwright.config.visual.ts",
    "lint": "eslint . --ext ts,tsx",
    "lint:fix": "eslint . --ext ts,tsx --fix",
+    "lint:ui": "eslint src/components src/features --ext ts,tsx",
+    "report:arbitrary": "node scripts/report-arbitrary-values.mjs",
    "typecheck": "tsc --noEmit",
    "generate:types": "bash ./scripts/generate-types.sh",
    "validate:schemas": "vitest run src/schemas",
--- a/apps/web/playwright.config.visual.ts
+++ b/apps/web/playwright.config.visual.ts
@ -1,29 +1,40 @@
 import { defineConfig, devices } from '@playwright/test';
+import path from 'path';

 /**
- * Playwright config for pixel-perfect visual regression tests.
+ * Playwright config for pixel-perfect visual regression (capture & compare).
 *
- * - Fixed viewport and single browser (Chromium) for reproducible screenshots.
- * - Snapshots stored in e2e/snapshots/ for easy review and CI artifact.
- * - Optional: run without global auth for login/register snapshots.
+ * - Viewport fixe 1280×720, dark mode forcé, reduced motion.
+ * - Désactivation des animations CSS via inject-style (fixture / beforeEach).
+ * - Sortie : visual-tests/current/ (capture) ou visual-tests/baselines/ (update).
 *
- * Run:
- *   npx playwright test --config=playwright.config.visual.ts
- * Update baselines:
- *   npx playwright test --config=playwright.config.visual.ts --update-snapshots
+ * Usage:
+ *   npm run visual:capture   → écrit dans visual-tests/current/
+ *   npm run visual:update    → écrit dans visual-tests/baselines/
+ *   npm run visual:compare   → script generate-visual-report.mjs (baselines vs current)
 */
+const VIEWPORT = { width: 1280, height: 720 };
+const THEME = 'dark';
+const VIEWPORT_LABEL = 'desktop';
+
+export const visualOutputDir = process.env.VISUAL_UPDATE_BASELINES
+  ? path.join(process.cwd(), 'visual-tests', 'baselines')
+  : path.join(process.cwd(), 'visual-tests', 'current');
+
+export function screenshotName(screenName: string): string {
+  return `${screenName}-${VIEWPORT_LABEL}-${THEME}.png`;
+}
+
 export default defineConfig({
-  testDir: './e2e/tests/visual',
-  testMatch: /.*\.spec\.ts/,
+  testDir: './e2e',
+  testMatch: /visual-complete\.spec\.ts/,
  fullyParallel: false,
  forbidOnly: !!process.env.CI,
  retries: process.env.CI ? 1 : 0,
  workers: 1,
-  timeout: 30000,
+  timeout: 45000,

  outputDir: 'e2e/test-results-visual',
-  snapshotPathTemplate: '{testDir}/__snapshots__/{arg}-{projectName}{ext}',
-
  reporter: [
    ['html', { outputFolder: 'e2e/playwright-report-visual', open: 'never' }],
    ['list'],
@ -34,10 +45,15 @@ export default defineConfig({
    trace: 'on-first-retry',
    screenshot: 'only-on-failure',
    video: 'off',
-    // Fixed viewport for pixel-perfect comparison (no cross-resolution variance)
-    viewport: { width: 1280, height: 720 },
-    // Storage state: set per-test for login (no auth) vs dashboard (auth)
-    storageState: process.env.VISUAL_AUTH_STATE || 'e2e/.auth/user.json',
+    viewport: VIEWPORT,
+    deviceScaleFactor: 1,
+    isMobile: false,
+    hasTouch: false,
+    locale: 'en-US',
+    timezoneId: 'Europe/Paris',
+    reducedMotion: 'reduce',
+    colorScheme: 'dark',
+    storageState: process.env.VISUAL_NO_AUTH ? undefined : 'e2e/.auth/user.json',
  },

  projects: [
@ -45,12 +61,10 @@ export default defineConfig({
      name: 'chromium-desktop',
      use: {
        ...devices['Desktop Chrome'],
-        viewport: { width: 1280, height: 720 },
+        viewport: VIEWPORT,
        deviceScaleFactor: 1,
-        isMobile: false,
-        hasTouch: false,
-        locale: 'en-US',
-        timezoneId: 'Europe/Paris',
+        reducedMotion: 'reduce',
+        colorScheme: 'dark',
      },
    },
  ],
--- a/apps/web/scripts/capture-visual-baseline.mjs
+++ b/apps/web/scripts/capture-visual-baseline.mjs
@ -0,0 +1,131 @@
+#!/usr/bin/env node
+/**
+ * Capture visual baseline or current screenshots for pixel-accurate regression.
+ * Usage:
+ *   node scripts/capture-visual-baseline.mjs [--baseline]
+ *   --baseline  Write to visual-tests/baselines/ (default: visual-tests/current/)
+ *
+ * Requires: dev server running at baseURL (default http://localhost:5173).
+ * Set PLAYWRIGHT_BASE_URL or VITE_FRONTEND_URL to override.
+ *
+ * Viewport: 1280×720, dark theme, reduced motion for stability.
+ */
+
+import { chromium } from 'playwright';
+import path from 'path';
+import fs from 'fs';
+import { fileURLToPath } from 'url';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const ROOT = path.resolve(__dirname, '..');
+const BASE_URL = process.env.PLAYWRIGHT_BASE_URL || process.env.VITE_FRONTEND_URL || 'http://localhost:5173';
+const OUT_DIR = process.argv.includes('--baseline')
+  ? path.join(ROOT, 'visual-tests', 'baselines')
+  : path.join(ROOT, 'visual-tests', 'current');
+
+const VIEWPORT = { width: 1280, height: 720 };
+const ANIMATION_SETTLE_MS = 800;
+
+function ensureDarkTheme(page) {
+  return page.evaluate(() => {
+    document.documentElement.classList.add('dark');
+    document.documentElement.setAttribute('data-theme', 'dark');
+  });
+}
+
+async function waitSettle(page, ms = ANIMATION_SETTLE_MS) {
+  await page.waitForTimeout(ms);
+}
+
+async function captureFull(page, name) {
+  await ensureDarkTheme(page);
+  await waitSettle(page);
+  const file = path.join(OUT_DIR, `${name}-desktop.png`);
+  fs.mkdirSync(OUT_DIR, { recursive: true });
+  await page.screenshot({ path: file, fullPage: true });
+  console.log('  captured:', file);
+}
+
+async function captureLocator(page, locator, name) {
+  await ensureDarkTheme(page);
+  await waitSettle(page);
+  const file = path.join(OUT_DIR, `${name}-desktop.png`);
+  fs.mkdirSync(OUT_DIR, { recursive: true });
+  await locator.screenshot({ path: file });
+  console.log('  captured:', file);
+}
+
+const CRITICAL_SCREENS = [
+  { name: 'login', url: '/login', auth: false, full: true },
+  { name: 'register', url: '/register', auth: false, full: true },
+  { name: 'dashboard', url: '/dashboard', auth: true, full: true },
+  { name: 'sidebar', url: '/dashboard', auth: true, locator: 'aside.fixed' },
+  { name: 'playlists', url: '/playlists', auth: true, full: true },
+  { name: 'library', url: '/library', auth: true, full: true },
+  { name: '404', url: '/non-existent-route-404', auth: false, full: true },
+];
+
+async function main() {
+  console.log('Capture target:', OUT_DIR);
+  console.log('Base URL:', BASE_URL);
+
+  const browser = await chromium.launch({ headless: true });
+
+  const storageStatePath = path.join(ROOT, 'e2e', '.auth', 'user.json');
+  const hasAuth = fs.existsSync(storageStatePath);
+  const contextOptions = {
+    viewport: VIEWPORT,
+    deviceScaleFactor: 1,
+    locale: 'en-US',
+    reducedMotion: 'reduce',
+  };
+  if (hasAuth) {
+    try {
+      contextOptions.storageState = storageStatePath;
+    } catch (e) {
+      console.warn('Could not set auth state:', e.message);
+    }
+  } else {
+    console.warn('No e2e/.auth/user.json — authenticated screens may redirect to login.');
+  }
+
+  const context = await browser.newContext(contextOptions);
+
+  const page = await context.newPage();
+
+  for (const screen of CRITICAL_SCREENS) {
+    if (screen.auth && !hasAuth) {
+      console.log('Skip (auth required):', screen.name);
+      continue;
+    }
+    if (!screen.auth) {
+      await context.clearCookies();
+    }
+
+    const fullUrl = BASE_URL.replace(/\/$/, '') + screen.url;
+    console.log('Open:', screen.name, fullUrl);
+
+    await page.goto(fullUrl, { waitUntil: 'networkidle', timeout: 20000 }).catch(() => {});
+
+    if (screen.locator) {
+      const el = page.locator(screen.locator).first();
+      const visible = await el.waitFor({ state: 'visible', timeout: 8000 }).then(() => true).catch(() => false);
+      if (visible) {
+        await captureLocator(page, el, screen.name);
+      } else {
+        console.log('  skipped: locator not visible');
+      }
+    } else {
+      await page.waitForSelector('body', { timeout: 5000 }).catch(() => {});
+      await captureFull(page, screen.name);
+    }
+  }
+
+  await browser.close();
+  console.log('Done.');
+}
+
+main().catch((err) => {
+  console.error(err);
+  process.exit(1);
+});
--- a/apps/web/scripts/compare-visual.mjs
+++ b/apps/web/scripts/compare-visual.mjs
@ -0,0 +1,189 @@
+#!/usr/bin/env node
+/**
+ * Compare visual-tests/baselines/ vs visual-tests/current/ using pixelmatch.
+ * Writes diffs to visual-tests/diffs/ and report to visual-tests/reports/.
+ *
+ * Usage: node scripts/compare-visual.mjs [threshold]
+ *   threshold  Pixelmatch threshold 0–1 (default: VISUAL_DIFF_THRESHOLD or 0.1)
+ *
+ * Exit code: 0 if no diffs exceed maxDiffPixels (env VISUAL_MAX_DIFF_PIXELS, default 0).
+ */
+
+import fs from 'fs';
+import path from 'path';
+import { fileURLToPath } from 'url';
+import pixelmatch from 'pixelmatch';
+import { PNG } from 'pngjs';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const ROOT = path.resolve(__dirname, '..');
+const BASELINES = path.join(ROOT, 'visual-tests', 'baselines');
+const CURRENT = path.join(ROOT, 'visual-tests', 'current');
+const DIFFS = path.join(ROOT, 'visual-tests', 'diffs');
+const REPORTS = path.join(ROOT, 'visual-tests', 'reports');
+
+const THRESHOLD = parseFloat(process.env.VISUAL_DIFF_THRESHOLD || '0.1', 10);
+const MAX_DIFF_PIXELS = process.env.VISUAL_MAX_DIFF_PIXELS
+  ? parseInt(process.env.VISUAL_MAX_DIFF_PIXELS, 10)
+  : 0;
+
+function loadPng(filePath) {
+  const data = fs.readFileSync(filePath);
+  return PNG.sync.read(data);
+}
+
+function compare(baselinePath, currentPath, diffPath, threshold) {
+  const imgExpected = loadPng(baselinePath);
+  const imgActual = loadPng(currentPath);
+
+  if (imgExpected.width !== imgActual.width || imgExpected.height !== imgActual.height) {
+    return {
+      error: `Dimensions differ: ${imgExpected.width}x${imgExpected.height} vs ${imgActual.width}x${imgActual.height}`,
+      diffPixels: null,
+      totalPixels: imgExpected.width * imgExpected.height,
+    };
+  }
+
+  const { width, height } = imgExpected;
+  const totalPixels = width * height;
+  const diff = new PNG({ width, height });
+  const numDiffPixels = pixelmatch(
+    imgExpected.data,
+    imgActual.data,
+    diff.data,
+    width,
+    height,
+    { threshold }
+  );
+
+  fs.mkdirSync(path.dirname(diffPath), { recursive: true });
+  fs.writeFileSync(diffPath, PNG.sync.write(diff));
+
+  return { diffPixels: numDiffPixels, totalPixels, error: null };
+}
+
+function listPngs(dir) {
+  if (!fs.existsSync(dir)) return [];
+  return fs.readdirSync(dir).filter((f) => f.endsWith('.png'));
+}
+
+function generateHtmlReport(results, threshold) {
+  const rows = results
+    .map(
+      (r) => `
+    <tr class="${r.pass ? 'pass' : 'fail'}">
+      <td><code>${r.name}</code></td>
+      <td>${r.diffPixels ?? '—'}</td>
+      <td>${r.totalPixels ?? '—'}</td>
+      <td>${r.pass ? 'Pass' : 'Fail'}</td>
+      <td>${r.error ?? ''}</td>
+      <td>
+        ${r.diffPath ? `<a href="../diffs/${path.basename(r.diffPath)}">diff</a>` : ''}
+        ${r.baselinePath ? `<a href="../baselines/${path.basename(r.baselinePath)}">baseline</a>` : ''}
+        ${r.currentPath ? `<a href="../current/${path.basename(r.currentPath)}">current</a>` : ''}
+      </td>
+    </tr>`
+    )
+    .join('');
+
+  return `<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="utf-8" />
+  <title>Visual diff report</title>
+  <style>
+    body { font-family: system-ui, sans-serif; margin: 1rem 2rem; }
+    table { border-collapse: collapse; }
+    th, td { border: 1px solid #333; padding: 0.5rem 0.75rem; text-align: left; }
+    th { background: #1a1a1a; color: #eee; }
+    .pass { background: #0d2b0d; }
+    .fail { background: #2b0d0d; }
+    code { font-size: 0.9em; }
+    .meta { color: #888; font-size: 0.9rem; margin-bottom: 1rem; }
+  </style>
+</head>
+<body>
+  <h1>Visual diff report</h1>
+  <p class="meta">Threshold: ${threshold} | Max diff pixels (pass): ${MAX_DIFF_PIXELS} | Generated: ${new Date().toISOString()}</p>
+  <table>
+    <thead>
+      <tr>
+        <th>Screen</th>
+        <th>Diff pixels</th>
+        <th>Total pixels</th>
+        <th>Result</th>
+        <th>Error</th>
+        <th>Links</th>
+      </tr>
+    </thead>
+    <tbody>${rows}
+    </tbody>
+  </table>
+</body>
+</html>`;
+}
+
+async function main() {
+  const threshold = parseFloat(process.argv[2] || process.env.VISUAL_DIFF_THRESHOLD || '0.1', 10);
+
+  console.log('Comparing baselines vs current');
+  console.log('  Threshold:', threshold);
+  console.log('  Max diff pixels (pass):', MAX_DIFF_PIXELS);
+
+  const baselineFiles = listPngs(BASELINES);
+  if (baselineFiles.length === 0) {
+    console.log('No baseline PNGs in visual-tests/baselines/');
+    process.exit(0);
+  }
+
+  const results = [];
+  for (const name of baselineFiles) {
+    const baselinePath = path.join(BASELINES, name);
+    const currentPath = path.join(CURRENT, name);
+    if (!fs.existsSync(currentPath)) {
+      results.push({
+        name,
+        baselinePath,
+        currentPath: null,
+        diffPath: null,
+        diffPixels: null,
+        totalPixels: null,
+        error: 'No current file',
+        pass: false,
+      });
+      console.log(name, '— no current file');
+      continue;
+    }
+
+    const diffPath = path.join(DIFFS, name);
+    const out = compare(baselinePath, currentPath, diffPath, threshold);
+    const pass = out.error ? false : (out.diffPixels <= MAX_DIFF_PIXELS);
+    results.push({
+      name,
+      baselinePath,
+      currentPath,
+      diffPath: out.error ? null : diffPath,
+      diffPixels: out.diffPixels,
+      totalPixels: out.totalPixels,
+      error: out.error,
+      pass,
+    });
+    console.log(name, '— diff pixels:', out.diffPixels ?? out.error, pass ? '✓' : '✗');
+  }
+
+  fs.mkdirSync(REPORTS, { recursive: true });
+  fs.writeFileSync(
+    path.join(REPORTS, 'results.json'),
+    JSON.stringify({ threshold, maxDiffPixels: MAX_DIFF_PIXELS, results }, null, 2)
+  );
+  fs.writeFileSync(path.join(REPORTS, 'index.html'), generateHtmlReport(results, threshold));
+  console.log('Report:', path.join(REPORTS, 'index.html'));
+
+  const failed = results.filter((r) => !r.pass);
+  process.exit(failed.length > 0 ? 1 : 0);
+}
+
+main().catch((err) => {
+  console.error(err);
+  process.exit(1);
+});
--- a/apps/web/scripts/generate-visual-report.mjs
+++ b/apps/web/scripts/generate-visual-report.mjs
@ -0,0 +1,197 @@
+#!/usr/bin/env node
+/**
+ * Compare visual-tests/baselines/ vs visual-tests/current/ with pixelmatch.
+ * Produit un rapport JSON et HTML dans visual-tests/reports/ et les diffs dans visual-tests/diffs/.
+ *
+ * Usage: node scripts/generate-visual-report.mjs [threshold]
+ *   threshold  Sensibilité pixelmatch 0–1 (défaut: VISUAL_DIFF_THRESHOLD ou 0.1)
+ *
+ * Exit code: 0 si aucune diff ne dépasse maxDiffPixels (env VISUAL_MAX_DIFF_PIXELS, défaut 0).
+ */
+
+import fs from 'fs';
+import path from 'path';
+import { fileURLToPath } from 'url';
+import pixelmatch from 'pixelmatch';
+import { PNG } from 'pngjs';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const ROOT = path.resolve(__dirname, '..');
+const BASELINES = path.join(ROOT, 'visual-tests', 'baselines');
+const CURRENT = path.join(ROOT, 'visual-tests', 'current');
+const DIFFS = path.join(ROOT, 'visual-tests', 'diffs');
+const REPORTS = path.join(ROOT, 'visual-tests', 'reports');
+
+const THRESHOLD = parseFloat(process.argv[2] || process.env.VISUAL_DIFF_THRESHOLD || '0.1', 10);
+const MAX_DIFF_PIXELS = process.env.VISUAL_MAX_DIFF_PIXELS
+  ? parseInt(process.env.VISUAL_MAX_DIFF_PIXELS, 10)
+  : 0;
+
+function loadPng(filePath) {
+  const data = fs.readFileSync(filePath);
+  return PNG.sync.read(data);
+}
+
+function compare(baselinePath, currentPath, diffPath, threshold) {
+  const imgExpected = loadPng(baselinePath);
+  const imgActual = loadPng(currentPath);
+
+  if (imgExpected.width !== imgActual.width || imgExpected.height !== imgActual.height) {
+    return {
+      error: `Dimensions differ: ${imgExpected.width}x${imgExpected.height} vs ${imgActual.width}x${imgActual.height}`,
+      diffPixels: null,
+      totalPixels: imgExpected.width * imgExpected.height,
+    };
+  }
+
+  const { width, height } = imgExpected;
+  const totalPixels = width * height;
+  const diff = new PNG({ width, height });
+  const numDiffPixels = pixelmatch(
+    imgExpected.data,
+    imgActual.data,
+    diff.data,
+    width,
+    height,
+    { threshold }
+  );
+
+  fs.mkdirSync(path.dirname(diffPath), { recursive: true });
+  fs.writeFileSync(diffPath, PNG.sync.write(diff));
+
+  return { diffPixels: numDiffPixels, totalPixels, error: null };
+}
+
+function listPngs(dir) {
+  if (!fs.existsSync(dir)) return [];
+  return fs.readdirSync(dir).filter((f) => f.endsWith('.png'));
+}
+
+function generateHtmlReport(results, threshold) {
+  const rows = results
+    .map(
+      (r) => `
+    <tr class="${r.pass ? 'pass' : 'fail'}">
+      <td><code>${r.name}</code></td>
+      <td>${r.diffPixels ?? '—'}</td>
+      <td>${r.totalPixels ?? '—'}</td>
+      <td>${r.pass ? 'Pass' : 'Fail'}</td>
+      <td>${r.error ?? ''}</td>
+      <td>
+        ${r.diffPath ? `<a href="../diffs/${path.basename(r.diffPath)}">diff</a>` : ''}
+        ${r.baselinePath ? ` <a href="../baselines/${path.basename(r.baselinePath)}">baseline</a>` : ''}
+        ${r.currentPath ? ` <a href="../current/${path.basename(r.currentPath)}">current</a>` : ''}
+      </td>
+    </tr>`
+    )
+    .join('');
+
+  return `<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="utf-8" />
+  <title>Visual regression report</title>
+  <style>
+    body { font-family: system-ui, sans-serif; margin: 1rem 2rem; }
+    table { border-collapse: collapse; }
+    th, td { border: 1px solid #333; padding: 0.5rem 0.75rem; text-align: left; }
+    th { background: #1a1a1a; color: #eee; }
+    .pass { background: #0d2b0d; }
+    .fail { background: #2b0d0d; }
+    code { font-size: 0.9em; }
+    .meta { color: #888; font-size: 0.9rem; margin-bottom: 1rem; }
+  </style>
+</head>
+<body>
+  <h1>Visual regression report</h1>
+  <p class="meta">Threshold: ${threshold} | Max diff pixels (pass): ${MAX_DIFF_PIXELS} | Generated: ${new Date().toISOString()}</p>
+  <table>
+    <thead>
+      <tr>
+        <th>Screen</th>
+        <th>Diff pixels</th>
+        <th>Total pixels</th>
+        <th>Result</th>
+        <th>Error</th>
+        <th>Links</th>
+      </tr>
+    </thead>
+    <tbody>${rows}
+    </tbody>
+  </table>
+</body>
+</html>`;
+}
+
+async function main() {
+  console.log('Comparing baselines vs current');
+  console.log('  Threshold:', THRESHOLD);
+  console.log('  Max diff pixels (pass):', MAX_DIFF_PIXELS);
+
+  const baselineFiles = listPngs(BASELINES);
+  if (baselineFiles.length === 0) {
+    console.log('No baseline PNGs in visual-tests/baselines/');
+    fs.mkdirSync(REPORTS, { recursive: true });
+    fs.writeFileSync(
+      path.join(REPORTS, 'results.json'),
+      JSON.stringify({ threshold: THRESHOLD, maxDiffPixels: MAX_DIFF_PIXELS, results: [] }, null, 2)
+    );
+    fs.writeFileSync(path.join(REPORTS, 'index.html'), generateHtmlReport([], THRESHOLD));
+    process.exit(0);
+    return;
+  }
+
+  const results = [];
+  for (const name of baselineFiles) {
+    const baselinePath = path.join(BASELINES, name);
+    const currentPath = path.join(CURRENT, name);
+    if (!fs.existsSync(currentPath)) {
+      results.push({
+        name,
+        baselinePath,
+        currentPath: null,
+        diffPath: null,
+        diffPixels: null,
+        totalPixels: null,
+        error: 'No current file',
+        pass: false,
+      });
+      console.log(name, '— no current file');
+      continue;
+    }
+
+    const diffPath = path.join(DIFFS, name);
+    const out = compare(baselinePath, currentPath, diffPath, THRESHOLD);
+    const pass = out.error ? false : out.diffPixels <= MAX_DIFF_PIXELS;
+    results.push({
+      name,
+      baselinePath,
+      currentPath,
+      diffPath: out.error ? null : diffPath,
+      diffPixels: out.diffPixels,
+      totalPixels: out.totalPixels,
+      error: out.error,
+      pass,
+    });
+    console.log(name, '— diff pixels:', out.diffPixels ?? out.error, pass ? '✓' : '✗');
+  }
+
+  fs.mkdirSync(REPORTS, { recursive: true });
+  const jsonPath = path.join(REPORTS, 'results.json');
+  const htmlPath = path.join(REPORTS, 'index.html');
+  fs.writeFileSync(
+    jsonPath,
+    JSON.stringify({ threshold: THRESHOLD, maxDiffPixels: MAX_DIFF_PIXELS, results }, null, 2)
+  );
+  fs.writeFileSync(htmlPath, generateHtmlReport(results, THRESHOLD));
+  console.log('Report JSON:', jsonPath);
+  console.log('Report HTML:', htmlPath);
+
+  const failed = results.filter((r) => !r.pass);
+  process.exit(failed.length > 0 ? 1 : 0);
+}
+
+main().catch((err) => {
+  console.error(err);
+  process.exit(1);
+});
--- a/apps/web/scripts/report-arbitrary-values.mjs
+++ b/apps/web/scripts/report-arbitrary-values.mjs
@ -0,0 +1,107 @@
+#!/usr/bin/env node
+/**
+ * Rapport des valeurs arbitraires Tailwind (w-[...], h-[...], gap-[...], etc.)
+ * pour prioriser les migrations vers le design system.
+ * Usage: node scripts/report-arbitrary-values.mjs [--json] [--dir src/components]
+ * Sortie: rapport (fichier, ligne, pattern) — pas de remplacement automatique.
+ */
+
+import fs from 'fs';
+import path from 'path';
+
+const ARBITRARY_PATTERNS = [
+  { name: 'width', regex: /(?:^|\s)(w-|min-w-|max-w-)\[[^\]]+\]/g },
+  { name: 'height', regex: /(?:^|\s)(h-|min-h-|max-h-)\[[^\]]+\]/g },
+  { name: 'gap', regex: /(?:^|\s)gap-\[[^\]]+\]/g },
+  { name: 'padding', regex: /(?:^|\s)(p-|px-|py-|pt-|pb-|pl-|pr-)\[[^\]]+\]/g },
+  { name: 'margin', regex: /(?:^|\s)(m-|mx-|my-|mt-|mb-|ml-|mr-)\[[^\]]+\]/g },
+  { name: 'space', regex: /(?:^|\s)space-[xy]-\[[^\]]+\]/g },
+  { name: 'rounded', regex: /(?:^|\s)rounded-\[[^\]]+\]/g },
+  { name: 'shadow', regex: /(?:^|\s)shadow-\[[^\]]+\]/g },
+];
+
+const DEFAULT_DIRS = ['src/components', 'src/features'];
+const IGNORE_DIRS = ['node_modules', 'dist', '.storybook', 'dist_verification'];
+const EXTENSIONS = new Set(['.tsx', '.jsx', '.ts', '.js']);
+
+function parseArgs() {
+  const args = process.argv.slice(2);
+  let dirs = DEFAULT_DIRS;
+  let json = false;
+  for (let i = 0; i < args.length; i++) {
+    if (args[i] === '--json') json = true;
+    else if (args[i] === '--dir' && args[i + 1]) {
+      dirs = [args[++i]];
+    }
+  }
+  return { dirs, json };
+}
+
+function* walkFiles(dir, base = dir) {
+  if (!fs.existsSync(dir)) return;
+  const entries = fs.readdirSync(dir, { withFileTypes: true });
+  for (const e of entries) {
+    const full = path.join(dir, e.name);
+    const rel = path.relative(base, full);
+    if (e.isDirectory()) {
+      if (!IGNORE_DIRS.includes(e.name)) yield* walkFiles(full, base);
+    } else if (EXTENSIONS.has(path.extname(e.name))) {
+      yield { full, rel };
+    }
+  }
+}
+
+function scanFile(filePath) {
+  const content = fs.readFileSync(filePath, 'utf8');
+  const lines = content.split('\n');
+  const hits = [];
+  for (let i = 0; i < lines.length; i++) {
+    const line = lines[i];
+    for (const { name, regex } of ARBITRARY_PATTERNS) {
+      regex.lastIndex = 0;
+      let m;
+      while ((m = regex.exec(line)) !== null) {
+        hits.push({
+          pattern: name,
+          match: m[0].trim(),
+          line: i + 1,
+        });
+      }
+    }
+  }
+  return hits;
+}
+
+function main() {
+  const { dirs, json } = parseArgs();
+  const cwd = process.cwd();
+  const report = [];
+
+  for (const dir of dirs) {
+    const absDir = path.isAbsolute(dir) ? dir : path.join(cwd, dir);
+    for (const { full, rel } of walkFiles(absDir)) {
+      const hits = scanFile(full);
+      if (hits.length > 0) {
+        report.push({ file: rel, hits });
+      }
+    }
+  }
+
+  if (json) {
+    console.log(JSON.stringify(report, null, 2));
+    return;
+  }
+
+  console.log('# Rapport des valeurs arbitraires Tailwind\n');
+  console.log('Prioriser les migrations vers tokens / scale (voir docs/DESIGN_TOKENS.md).\n');
+  for (const { file, hits } of report) {
+    console.log(`## ${file}`);
+    for (const { pattern, match, line } of hits) {
+      console.log(`  ${line}: [${pattern}] ${match}`);
+    }
+    console.log('');
+  }
+  console.log(`Total: ${report.length} fichiers, ${report.reduce((s, r) => s + r.hits.length, 0)} occurrences.`);
+}
+
+main();
--- a/apps/web/src/components/BulkModeBanner.tsx
+++ b/apps/web/src/components/BulkModeBanner.tsx
@ -72,7 +72,7 @@ export function BulkModeBanner({
      className={cn(
        'w-full bg-kodo-steel/10 border-b border-kodo-steel/30 text-kodo-steel',
        'px-4 py-4 flex items-center justify-between gap-4',
-        'transition-all duration-300',
+        'transition-all duration-[var(--duration-normal)]',
        className,
      )}
    >
--- a/apps/web/src/components/commerce/CartItem.tsx
+++ b/apps/web/src/components/commerce/CartItem.tsx
@ -27,7 +27,7 @@ export const CartItem: React.FC<CartItemProps> = ({ item, onRemove }) => {
      <div className="w-full md:w-24 h-24 rounded-lg overflow-hidden flex-shrink-0 bg-kodo-graphite">
        <img
          src={product.coverUrl}
-          className="w-full h-full object-cover group-hover:scale-105 transition-transform duration-500"
+          className="w-full h-full object-cover group-hover:scale-105 transition-transform duration-[var(--duration-slow)]"
          alt={product.title}
        />
      </div>
--- a/apps/web/src/components/commerce/WishlistView.tsx
+++ b/apps/web/src/components/commerce/WishlistView.tsx
@ -119,7 +119,7 @@ export const WishlistView: React.FC = () => {
              <div className="relative w-24 h-24 bg-muted rounded-lg overflow-hidden flex-shrink-0">
                <img
                  src={product.coverUrl}
-                  className="w-full h-full object-cover group-hover:scale-110 transition-transform duration-500"
+                  className="w-full h-full object-cover group-hover:scale-110 transition-transform duration-[var(--duration-slow)]"
                />
                <div
                  className="absolute inset-0 bg-black/40 flex items-center justify-center opacity-0 group-hover:opacity-100 transition-opacity cursor-pointer"
--- a/apps/web/src/components/dashboard/ActivityGraph.tsx
+++ b/apps/web/src/components/dashboard/ActivityGraph.tsx
@ -97,7 +97,7 @@ export function ActivityGraph() {
              {/* Barre */}
              <div
                className={cn(
-                  "w-full rounded-t-sm transition-all duration-300 relative z-10",
+                  "w-full rounded-t-sm transition-all duration-[var(--duration-normal)] relative z-10",
                  isHovered ? "bg-kodo-cyan opacity-100" : "bg-kodo-cyan/30 opacity-70",
                  // Animation d'entrée
                  "animate-slideUp"
@ -116,13 +116,13 @@ export function ActivityGraph() {
              {/* Tooltip */}
              <div
                className={cn(
-                  "absolute bottom-[110%] left-1/2 -translate-x-1/2 z-20 transition-all duration-200 pointer-events-none",
+                  "absolute bottom-[110%] left-1/2 -translate-x-1/2 z-20 transition-all duration-[var(--duration-fast)] pointer-events-none",
                  isHovered ? "opacity-100 translate-y-0" : "opacity-0 translate-y-2"
                )}
              >
                <div className="bg-kodo-ink border border-kodo-steel/50 px-3 py-2 rounded-lg shadow-xl whitespace-nowrap">
                  <div className="text-xs font-bold text-white mb-0.5">{point.value} écoutes</div>
-                  <div className="text-[10px] text-kodo-text-dim font-mono">{point.label}</div>
+                  <div className="text-xs text-kodo-text-dim font-mono">{point.label}</div>
                </div>
                {/* Triangle du tooltip */}
                <div className="w-2 h-2 bg-kodo-ink border-b border-r border-kodo-steel/50 rotate-45 absolute -bottom-1 left-1/2 -translate-x-1/2" />
@ -130,7 +130,7 @@ export function ActivityGraph() {

              {/* Label Axe X (tous les 3 ou 5 points selon densité) */}
              {(period === 7 || i % 5 === 0) && (
-                <div className="absolute top-full mt-2 left-1/2 -translate-x-1/2 text-[10px] text-kodo-text-dim font-mono whitespace-nowrap">
+                <div className="absolute top-full mt-2 left-1/2 -translate-x-1/2 text-xs text-kodo-text-dim font-mono whitespace-nowrap">
                  {point.label.split(' ')[0]}
                </div>
              )}
--- a/apps/web/src/components/dashboard/StatCard.tsx
+++ b/apps/web/src/components/dashboard/StatCard.tsx
@ -75,7 +75,7 @@ export const StatCard: React.FC<StatCardProps> = ({
          strokeLinecap="round"
          strokeLinejoin="round"
          vectorEffect="non-scaling-stroke"
-          className="drop-shadow-[0_0_8px_currentColor]"
+          className="drop-shadow-stat-sparkline"
        />
      </svg>
    );
--- a/apps/web/src/components/developer/WebhooksView.tsx
+++ b/apps/web/src/components/developer/WebhooksView.tsx
@ -101,7 +101,7 @@ export const WebhooksView: React.FC = () => {
          webhooks.map((hook) => (
            <Card key={hook.id} variant="glass" className="group overflow-hidden relative border-white/5 hover:border-white/10 transition-all bg-black/40">
              {/* Status Indicator Bar */}
-              <div className={cn("absolute left-0 top-0 bottom-0 w-1", hook.status === 'active' ? 'bg-lime-500 shadow-[0_0_10px_rgba(var(--lime-500),0.5)]' : 'bg-red-500 shadow-[0_0_10px_rgba(var(--red-500),0.5)]')} />
+              <div className={cn("absolute left-0 top-0 bottom-0 w-1", hook.status === 'active' ? 'bg-lime-500 shadow-status-dot-lime' : 'bg-red-500')} />

              <div className="flex flex-col md:flex-row items-start md:items-center justify-between p-6 pl-8 gap-4">
                <div className="flex-1">
--- a/apps/web/src/components/developer/modals/CreateAPIKeyModal.tsx
+++ b/apps/web/src/components/developer/modals/CreateAPIKeyModal.tsx
@ -137,9 +137,9 @@ export const CreateAPIKeyModal: React.FC<CreateAPIKeyModalProps> = ({
                    <label
                      key={scope.id}
                      className={cn(
-                        "flex items-center justify-between p-4 rounded-xl border cursor-pointer transition-all duration-200 group relative overflow-hidden",
+                        "flex items-center justify-between p-4 rounded-xl border cursor-pointer transition-all duration-[var(--duration-fast)] group relative overflow-hidden",
                        selectedScopes.includes(scope.id)
-                          ? "bg-kodo-cyan/10 border-kodo-cyan/50 shadow-[0_0_15px_rgba(102,252,241,0.1)]"
+                          ? "bg-kodo-cyan/10 border-kodo-cyan/50 shadow-card-glow-cyan"
                          : "bg-kodo-void/30 border-kodo-steel/50 hover:border-kodo-steel hover:bg-white/5"
                      )}
                    >
@ -179,8 +179,8 @@ export const CreateAPIKeyModal: React.FC<CreateAPIKeyModalProps> = ({
            <div className="text-center space-y-8 py-4">
              <div className="relative w-20 h-20 mx-auto">
                <div className="absolute inset-0 bg-kodo-lime/20 rounded-full animate-ping opacity-50"></div>
-                <div className="relative w-full h-full bg-gradient-to-br from-kodo-lime/20 to-kodo-cyan/20 rounded-full flex items-center justify-center border border-kodo-lime/30 shadow-[0_0_30px_rgba(54,229,209,0.2)]">
-                  <Check className="w-10 h-10 text-kodo-lime drop-shadow-[0_0_10px_rgba(54,229,209,0.5)]" />
+                <div className="relative w-full h-full bg-gradient-to-br from-kodo-lime/20 to-kodo-cyan/20 rounded-full flex items-center justify-center border border-kodo-lime/30 shadow-card-glow-cyan">
+                  <Check className="w-10 h-10 text-kodo-lime drop-shadow-lg" />
                </div>
              </div>

@ -233,7 +233,7 @@ export const CreateAPIKeyModal: React.FC<CreateAPIKeyModalProps> = ({
                }}
                disabled={isGenerating || !name.trim() || selectedScopes.length === 0}
                type="button"
-                className="bg-kodo-cyan hover:bg-kodo-cyan/80 text-black font-semibold shadow-[0_0_20px_rgba(102,252,241,0.3)] hover:shadow-[0_0_30px_rgba(102,252,241,0.5)] transition-all duration-300"
+                className="bg-kodo-cyan hover:bg-kodo-cyan/80 text-black font-semibold shadow-button-primary-glow hover:shadow-button-primary-glow-hover transition-all duration-[var(--duration-normal)]"
              >
                {isGenerating ? (
                  <>
@ -248,7 +248,7 @@ export const CreateAPIKeyModal: React.FC<CreateAPIKeyModalProps> = ({
          ) : (
            <Button
              onClick={onClose}
-              className="bg-kodo-cyan hover:bg-kodo-cyan/80 text-black font-semibold min-w-[100px] shadow-[0_0_20px_rgba(102,252,241,0.3)] hover:shadow-[0_0_30px_rgba(102,252,241,0.5)] transition-all duration-300"
+              className="bg-kodo-cyan hover:bg-kodo-cyan/80 text-black font-semibold min-w-[100px] shadow-button-primary-glow hover:shadow-button-primary-glow-hover transition-all duration-[var(--duration-normal)]"
            >
              Done
            </Button>
--- a/apps/web/src/components/education/CourseCard.tsx
+++ b/apps/web/src/components/education/CourseCard.tsx
@ -25,14 +25,14 @@ export const CourseCard: React.FC<CourseCardProps> = ({
      <div className="relative aspect-video bg-kodo-ink overflow-hidden">
        <img
          src={course.thumbnailUrl}
-          className="w-full h-full object-cover opacity-90 group-hover:opacity-100 transition-opacity duration-200"
+          className="w-full h-full object-cover opacity-90 group-hover:opacity-100 transition-opacity duration-[var(--duration-fast)]"
          alt={course.title}
        />
        <div className="absolute inset-0 bg-black/40 opacity-0 group-hover:opacity-100 transition-opacity flex items-center justify-center backdrop-blur-sm">
          <PlayCircle className="w-12 h-12 text-white fill-current opacity-80" />
        </div>
        {course.certificateAvailable && (
-          <div className="absolute top-2 right-2 bg-kodo-gold/90 text-black text-[10px] font-bold px-2 py-0.5 rounded shadow-lg flex items-center gap-1">
+          <div className="absolute top-2 right-2 bg-kodo-gold/90 text-black text-xs font-bold px-2 py-0.5 rounded shadow-lg flex items-center gap-1">
            <Star className="w-3 h-3 fill-current" /> CERTIFIED
          </div>
        )}
@ -45,7 +45,7 @@ export const CourseCard: React.FC<CourseCardProps> = ({
      <div className="p-4 flex flex-col flex-1">
        <div className="flex justify-between items-start mb-2">
          <span
-            className={`text-[10px] px-2 py-0.5 rounded uppercase font-bold ${
+            className={`text-xs px-2 py-0.5 rounded uppercase font-bold ${
              course.level === 'Advanced'
                ? 'bg-kodo-red/20 text-kodo-red'
                : course.level === 'Intermediate'
--- a/apps/web/src/components/education/modals/QuizModal.tsx
+++ b/apps/web/src/components/education/modals/QuizModal.tsx
@ -118,7 +118,7 @@ export const QuizModal: React.FC<QuizModalProps> = ({
        {/* Progress */}
        <div className="h-1 bg-kodo-steel w-full">
          <div
-            className="h-full bg-kodo-cyan transition-all duration-300"
+            className="h-full bg-kodo-cyan transition-all duration-[var(--duration-normal)]"
            style={{
              width: `${((currentQuestionIndex + 1) / quiz.questions.length) * 100}%`,
            }}
--- a/apps/web/src/components/feedback/Progress.tsx
+++ b/apps/web/src/components/feedback/Progress.tsx
@ -70,7 +70,7 @@ export function Progress({
            strokeDashoffset={strokeDashoffset}
            strokeLinecap="round"
            className={cn(
-              'transition-all duration-300 ease-in-out',
+              'transition-all duration-[var(--duration-normal)] ease-in-out',
              !color && 'text-primary',
            )}
            style={color ? { stroke: color } : undefined}
@ -109,7 +109,7 @@ export function Progress({
      >
        <div
          className={cn(
-            'h-full rounded-full transition-all duration-300 ease-in-out',
+            'h-full rounded-full transition-all duration-[var(--duration-normal)] ease-in-out',
            !color && 'bg-primary',
          )}
          style={{
--- a/apps/web/src/components/feedback/Toast.tsx
+++ b/apps/web/src/components/feedback/Toast.tsx
@ -67,7 +67,7 @@ export function ToastComponent({ toast, onDismiss }: ToastProps) {
    <Card
      variant="glass"
      className={cn(
-        'relative flex min-w-[320px] max-w-sm items-start gap-4 p-4 shadow-[0_4px_20px_rgba(0,0,0,0.2)] transition-all duration-300 transform',
+        'relative flex min-w-80 max-w-sm items-start gap-4 p-4 shadow-modal transition-all duration-[var(--duration-normal)] transform',
        variantClass,
        isVisible && !isLeaving
          ? 'opacity-100 translate-x-0 translate-y-0 scale-100'
@ -84,7 +84,7 @@ export function ToastComponent({ toast, onDismiss }: ToastProps) {
      </div>
      <button
        onClick={handleDismiss}
-        className="flex-shrink-0 rounded-md p-1 opacity-60 transition-opacity hover:opacity-100 hover:bg-black/10 focus:outline-none focus:ring-1 focus:ring-current"
+        className="flex-shrink-0 rounded-md p-1 opacity-60 transition-opacity duration-[var(--duration-fast)] hover:opacity-100 hover:bg-black/10 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-primary/50 focus-visible:ring-offset-2 focus-visible:ring-offset-background"
        aria-label="Close"
      >
        <X className="h-4 w-4" />
--- a/apps/web/src/components/forms/PasswordStrengthIndicator.tsx
+++ b/apps/web/src/components/forms/PasswordStrengthIndicator.tsx
@ -67,7 +67,7 @@ export function PasswordStrengthIndicator({
        <div className="flex-1 bg-kodo-steel/30 dark:bg-kodo-steel rounded-full h-2 overflow-hidden">
          <div
            className={cn(
-              'h-2 rounded-full transition-all duration-300',
+              'h-2 rounded-full transition-all duration-[var(--duration-normal)]',
              currentStrengthColor,
            )}
            style={{ width: `${(strength.score / 5) * 100}%` }}
--- a/apps/web/src/components/gamification/AchievementCard.tsx
+++ b/apps/web/src/components/gamification/AchievementCard.tsx
@ -38,7 +38,7 @@ export const AchievementCard: React.FC<AchievementCardProps> = ({
        className={`flex ${compact ? 'flex-row items-center gap-4' : 'flex-col items-center text-center gap-4'}`}
      >
        <div
-          className={`rounded-full bg-gradient-to-br from-kodo-graphite to-black flex items-center justify-center border-2 ${isUnlocked ? 'border-kodo-gold w-16 h-16 text-3xl shadow-[0_0_15px_rgba(234,179,8,0.3)]' : 'border-kodo-steel w-12 h-12 text-xl text-kodo-content-dim'}`}
+          className={`rounded-full bg-gradient-to-br from-kodo-graphite to-black flex items-center justify-center border-2 ${isUnlocked ? 'border-kodo-gold w-16 h-16 text-3xl shadow-gold-glow' : 'border-kodo-steel w-12 h-12 text-xl text-kodo-content-dim'}`}
        >
          {achievement.icon}
        </div>
@ -56,11 +56,11 @@ export const AchievementCard: React.FC<AchievementCardProps> = ({
          {/* Progress */}
          <div className="w-full bg-kodo-graphite h-1.5 rounded-full overflow-hidden">
            <div
-              className={`h-full transition-all duration-500 ${isUnlocked ? 'bg-kodo-gold' : 'bg-kodo-steel'}`}
+              className={`h-full transition-all duration-[var(--duration-slow)] ${isUnlocked ? 'bg-kodo-gold' : 'bg-kodo-steel'}`}
              style={{ width: `${percentage}%` }}
            ></div>
          </div>
-          <div className="flex justify-between text-[10px] mt-1 font-mono">
+          <div className="flex justify-between text-xs mt-1 font-mono">
            <span className={isUnlocked ? 'text-kodo-gold' : 'text-kodo-content-dim'}>
              {achievement.progress} / {achievement.maxProgress}
            </span>
--- a/apps/web/src/components/gamification/ProfileXPView.tsx
+++ b/apps/web/src/components/gamification/ProfileXPView.tsx
@ -63,7 +63,7 @@ export const ProfileXPView: React.FC<ProfileXPViewProps> = ({ username }) => {
        <div className="relative z-10 flex flex-col md:flex-row items-center gap-8">
          {/* Level Badge */}
          <div className="flex flex-col items-center justify-center">
-            <div className="w-24 h-24 bg-gradient-to-b from-kodo-gold to-orange-600 rounded-full flex items-center justify-center shadow-[0_0_30px_rgba(234,179,8,0.4)] border-4 border-black">
+            <div className="w-24 h-24 bg-gradient-to-b from-kodo-gold to-orange-600 rounded-full flex items-center justify-center shadow-gold-glow border-4 border-black">
              <div className="text-4xl font-black text-black">
                {xpData.level}
              </div>
--- a/apps/web/src/components/gamification/XPBar.tsx
+++ b/apps/web/src/components/gamification/XPBar.tsx
@ -29,7 +29,7 @@ export const XPBar: React.FC<XPBarProps> = ({
  };

  const textClasses = {
-    sm: 'text-[10px]',
+    sm: 'text-xs',
    md: 'text-xs',
    lg: 'text-sm',
  };
@ -55,7 +55,7 @@ export const XPBar: React.FC<XPBarProps> = ({

        {/* Progress Fill */}
        <div
-          className="h-full bg-gradient-to-r from-kodo-gold/80 to-kodo-gold transition-all duration-500 shadow-[0_0_15px_rgba(234,179,8,0.4)] relative"
+          className="h-full bg-gradient-to-r from-kodo-gold/80 to-kodo-gold transition-all duration-[var(--duration-slow)] shadow-gold-glow relative"
          style={{ width: `${percentage}%` }}
        >
          {/* Shimmer Effect */}
@ -64,7 +64,7 @@ export const XPBar: React.FC<XPBarProps> = ({
      </div>

      {showLabels && size === 'lg' && (
-        <div className="text-right text-[10px] text-kodo-content-dim mt-1 font-mono">
+        <div className="text-right text-xs text-kodo-content-dim mt-1 font-mono">
          {Math.round(nextLevelXP - currentXP)} XP to next level
        </div>
      )}
--- a/apps/web/src/components/inventory/EquipmentCard.tsx
+++ b/apps/web/src/components/inventory/EquipmentCard.tsx
@ -23,17 +23,17 @@ export const EquipmentCard: React.FC<EquipmentCardProps> = ({
  return (
    <Card
      variant="default"
-      className="group p-0 overflow-hidden cursor-pointer hover:bg-white/5 transition-colors duration-200 flex flex-col h-full"
+      className="group p-0 overflow-hidden cursor-pointer hover:bg-white/5 transition-colors duration-[var(--duration-fast)] flex flex-col h-full"
      onClick={() => onClick(item)}
    >
      <div className="relative aspect-square bg-kodo-ink overflow-hidden">
        <img
          src={item.image || 'https://via.placeholder.com/400'}
-          className="w-full h-full object-cover opacity-90 group-hover:opacity-100 transition-opacity duration-200"
+          className="w-full h-full object-cover opacity-90 group-hover:opacity-100 transition-opacity duration-[var(--duration-fast)]"
        />
        <div className="absolute top-2 right-2">
          <span
-            className={`px-2 py-1 rounded text-[10px] font-bold uppercase backdrop-blur-md ${statusColor[item.status]}`}
+            className={`px-2 py-1 rounded text-xs font-bold uppercase backdrop-blur-md ${statusColor[item.status]}`}
          >
            {item.status}
          </span>
--- a/apps/web/src/components/layout/AudioPlayer.tsx
+++ b/apps/web/src/components/layout/AudioPlayer.tsx
@ -63,7 +63,7 @@ export const AudioPlayer: React.FC = () => {

      {/* QUEUE DRAWER */}
      {showQueue && !isImmersive && (
-        <div className="fixed bottom-24 right-4 w-full md:w-96 bg-card/95 backdrop-blur-xl border border-border/50 rounded-xl shadow-2xl z-40 overflow-hidden animate-slideUp max-h-[70vh] flex flex-col ring-1 ring-white/10">
+        <div className="fixed bottom-24 right-4 w-full md:w-96 bg-card/95 backdrop-blur-xl border border-border/50 rounded-xl shadow-2xl z-40 overflow-hidden animate-slideUp max-h-layout-panel flex flex-col ring-1 ring-white/10">
          <div className="flex items-center justify-between p-4 border-b border-border bg-muted/80">
            <h3 className="font-bold text-foreground text-sm tracking-wide flex items-center gap-2">
              <ListMusic className="w-4 h-4 text-kodo-steel" /> PLAY QUEUE
@ -94,7 +94,7 @@ export const AudioPlayer: React.FC = () => {
              {queueTab === 'up-next' && (
                <>
                  <div className="p-4 bg-primary/5 border-b border-border/30">
-                    <div className="text-[10px] font-bold text-muted-foreground uppercase tracking-wider mb-2">
+                    <div className="text-xs font-bold text-muted-foreground uppercase tracking-wider mb-2">
                      Now Playing
                    </div>
                    <div className="flex items-center gap-4 group relative">
--- a/apps/web/src/components/layout/DashboardLayout.stories.tsx
+++ b/apps/web/src/components/layout/DashboardLayout.stories.tsx
@ -1,21 +1,12 @@
-import type { Meta, StoryObj } from '@storybook/react';
+import type { Meta, StoryObj } from '@storybook/react-vite';
 import { DashboardLayout } from './DashboardLayout';
+import DashboardPage from '@/features/dashboard/pages/DashboardPage';
+import { PlaylistListPage } from '@/features/playlists/pages/PlaylistListPage';
+import { LibraryPage } from '@/features/library/pages/LibraryPage';
+import { SettingsPage } from '@/features/settings/pages/SettingsPage';
+import { UserProfilePage } from '@/features/profile/pages/UserProfilePage';

-const meta = {
-    title: 'App/Layouts/DashboardLayout',
-    component: DashboardLayout,
-    tags: ['autodocs'],
-    parameters: {
-        layout: 'fullscreen',
-    },
-} satisfies Meta<typeof DashboardLayout>;
-
-export default meta;
-type Story = StoryObj<typeof meta>;
-
-export const Default: Story = {
-    args: {
-        children: (
+const placeholderContent = (
  <div className="space-y-4">
    <h1 className="text-3xl font-bold text-white">Dashboard Content</h1>
    <p className="text-gray-400">This is the main content area rendered within the layout.</p>
@ -24,13 +15,101 @@ export const Default: Story = {
      <div className="h-32 bg-white/5 rounded-xl border border-white/10 p-4">Card 2</div>
      <div className="h-32 bg-white/5 rounded-xl border border-white/10 p-4">Card 3</div>
    </div>
-                {/* Long content to test scrolling */}
    {Array.from({ length: 20 }).map((_, i) => (
      <div key={i} className="h-16 bg-white/5 rounded-lg border border-white/5 flex items-center px-4">
        Item {i + 1}
      </div>
    ))}
  </div>
-        ),
+);
+
+const meta = {
+  title: 'App/Layouts/DashboardLayout',
+  component: DashboardLayout,
+  tags: ['autodocs'],
+  parameters: {
+    layout: 'fullscreen',
+    viewport: { defaultViewport: 'desktop' },
+  },
+} satisfies Meta<typeof DashboardLayout>;
+
+export default meta;
+type Story = StoryObj<typeof meta>;
+
+/** Shell with placeholder content. Use to validate scroll and proportions. */
+export const Default: Story = {
+  name: 'App shell (placeholder)',
+  args: {
+    children: placeholderContent,
+  },
+};
+
+/** Full app view: shell + real Dashboard page (MSW mocks user + library). */
+export const DashboardFullLayout: Story = {
+  name: 'Dashboard – full layout',
+  render: () => (
+    <DashboardLayout>
+      <DashboardPage />
+    </DashboardLayout>
+  ),
+  parameters: {
+    layout: 'fullscreen',
+    router: { initialEntries: ['/dashboard'] },
+  },
+};
+
+/** Full app view: shell + Playlist list page (MSW mocks playlists). */
+export const PlaylistsFullLayout: Story = {
+  name: 'Playlists – full layout',
+  render: () => (
+    <DashboardLayout>
+      <PlaylistListPage />
+    </DashboardLayout>
+  ),
+  parameters: {
+    layout: 'fullscreen',
+    router: { initialEntries: ['/playlists'] },
+  },
+};
+
+/** Full app view: shell + Library page (MSW mocks tracks). */
+export const LibraryFullLayout: Story = {
+  name: 'Library – full layout',
+  render: () => (
+    <DashboardLayout>
+      <LibraryPage />
+    </DashboardLayout>
+  ),
+  parameters: {
+    layout: 'fullscreen',
+    router: { initialEntries: ['/library'] },
+  },
+};
+
+/** Full app view: shell + Settings page (MSW mocks user + users/settings). */
+export const SettingsFullLayout: Story = {
+  name: 'Settings – full layout',
+  render: () => (
+    <DashboardLayout>
+      <SettingsPage />
+    </DashboardLayout>
+  ),
+  parameters: {
+    layout: 'fullscreen',
+    router: { initialEntries: ['/settings'] },
+  },
+};
+
+/** Full app view: shell + Profile page (MSW mocks user profile). */
+export const ProfileFullLayout: Story = {
+  name: 'Profile – full layout',
+  render: () => (
+    <DashboardLayout>
+      <UserProfilePage />
+    </DashboardLayout>
+  ),
+  parameters: {
+    layout: 'fullscreen',
+    router: { initialEntries: ['/profile'] },
  },
 };
--- a/apps/web/src/components/layout/DashboardLayout.test.tsx
+++ b/apps/web/src/components/layout/DashboardLayout.test.tsx
@ -2,6 +2,7 @@ import { render, screen } from '@testing-library/react';
 import { describe, it, expect, vi, beforeEach } from 'vitest';
 import { BrowserRouter } from 'react-router-dom';
 import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
+import { ToastProvider } from '@/components/feedback/ToastProvider';
 import { DashboardLayout } from './DashboardLayout';

 // Mock useTranslation
@ -46,7 +47,9 @@ const TestWrapper = ({ children }: { children: React.ReactNode }) => {
  const queryClient = createTestQueryClient();
  return (
    <QueryClientProvider client={queryClient}>
-      <BrowserRouter>{children}</BrowserRouter>
+      <BrowserRouter>
+        <ToastProvider>{children}</ToastProvider>
+      </BrowserRouter>
    </QueryClientProvider>
  );
 };
@ -127,7 +130,7 @@ describe('DashboardLayout Component', () => {
    const mainContent = container.querySelector('.flex-1.flex.flex-col');
    expect(mainContent).toBeInTheDocument();

-    const main = container.querySelector('main.flex-1.overflow-auto');
+    const main = container.querySelector('main.flex-1');
    expect(main).toBeInTheDocument();
  });

--- a/apps/web/src/components/layout/DashboardLayout.tsx
+++ b/apps/web/src/components/layout/DashboardLayout.tsx
@ -33,10 +33,8 @@ export function DashboardLayout({ children }: DashboardLayoutProps) {
      {/* 3. Main Content Area (The only thing that scrolls) */}
      <div
        className={cn(
-          'flex-1 flex flex-col h-full relative z-10 transition-all duration-500 ease-in-out',
-          // Desktop margins: calculated precisely based on sidebar width + gap
-          sidebarOpen ? 'lg:ml-72' : 'lg:ml-28',
-          // Mobile: no margin (sidebar is overlay)
+          'flex-1 flex flex-col h-full relative z-10 transition-all duration-[var(--duration-slow)] ease-[var(--ease-in-out)]',
+          sidebarOpen ? 'lg:ml-main-expanded' : 'lg:ml-main-collapsed',
          'ml-0'
        )}
      >
@ -44,10 +42,8 @@ export function DashboardLayout({ children }: DashboardLayoutProps) {
        <Header />

        {/* Scrollable Content Container */}
-        {/* pt-20: content below fixed header (h-16) */}
-        {/* pb-32 ensures content isn't hidden by the floating player */}
        <main
-          className="flex-1 overflow-y-auto overflow-x-hidden pt-20 pb-32 px-4 md:px-8 custom-scrollbar"
+          className="flex-1 overflow-y-auto overflow-x-hidden pt-main pb-main px-4 md:px-8 custom-scrollbar"
          id="main-scroll-container"
        >
          <div className="max-w-layout-content mx-auto w-full">
--- a/apps/web/src/components/layout/Header.tsx
+++ b/apps/web/src/components/layout/Header.tsx
@ -53,11 +53,11 @@ export function Header(_props: HeaderProps) {
  };

  return (
-    <header className="fixed top-0 left-0 right-0 h-16 z-50 pointer-events-none">
+    <header className="fixed top-0 left-0 right-0 h-header z-50 pointer-events-none">
      <div className={cn(
-        "absolute top-0 right-0 h-16 bg-background/80 backdrop-blur-md flex items-center justify-between px-4 md:px-6 pointer-events-auto transition-all duration-200",
-        sidebarOpen ? "left-72" : "left-20",
-        "max-lg:left-0"
+        'absolute top-0 right-0 h-header bg-background/80 backdrop-blur-md flex items-center justify-between px-4 md:px-6 pointer-events-auto transition-all duration-[var(--duration-fast)]',
+        sidebarOpen ? 'left-header-expanded' : 'left-header-collapsed',
+        'max-lg:left-0'
      )}>

        {/* Mobile Sidebar Toggle */}
@ -77,7 +77,7 @@ export function Header(_props: HeaderProps) {
              placeholder="What do you want to play?"
              className="w-full h-10 pl-10 pr-4 bg-white/5 border-0 rounded-full text-sm text-foreground placeholder:text-muted-foreground focus:outline-none focus:ring-2 focus:ring-white/20 transition-all"
            />
-            <kbd className="absolute right-3 hidden sm:inline-flex items-center gap-0.5 px-2 py-0.5 rounded bg-white/5 text-[10px] font-medium text-muted-foreground">
+            <kbd className="absolute right-3 hidden sm:inline-flex items-center gap-0.5 px-2 py-0.5 rounded bg-white/5 text-xs font-medium text-muted-foreground">
              <Command className="w-3 h-3" />K
            </kbd>
          </div>
--- a/apps/web/src/components/layout/Layout.tsx
+++ b/apps/web/src/components/layout/Layout.tsx
@ -18,12 +18,12 @@ export function Layout({ children }: LayoutProps) {

      <Header />

-      <div className="flex relative z-10 transition-all duration-500">
+      <div className="flex relative z-10 transition-all duration-[var(--duration-slow)]">
        <Sidebar />

        <main
          className={cn(
-            'flex-1 min-h-layout-main transition-all duration-300 ease-in-out',
+            'flex-1 min-h-layout-main transition-all duration-[var(--duration-normal)] ease-[var(--ease-in-out)]',
            sidebarOpen ? 'lg:ml-64' : 'ml-0',
          )}
        >
--- a/apps/web/src/components/layout/Navbar.tsx
+++ b/apps/web/src/components/layout/Navbar.tsx
@ -190,7 +190,7 @@ export const Navbar: React.FC<NavbarProps> = ({ onNavigate, onLogout }) => {
                </div>
              </div>
              <ChevronDown
-                className={`w-4 h-4 text-white group-hover:text-primary transition-transform duration-200 ${showUserMenu ? 'rotate-180' : ''}`}
+                className={`w-4 h-4 text-white group-hover:text-primary transition-transform duration-[var(--duration-fast)] ${showUserMenu ? 'rotate-180' : ''}`}
              />
            </div>

--- a/apps/web/src/components/layout/Sidebar.tsx
+++ b/apps/web/src/components/layout/Sidebar.tsx
@ -93,30 +93,31 @@ export const Sidebar: React.FC<SidebarProps> = ({ currentView, onNavigate, onLog
    <>
      {sidebarOpen && (
        <div
-          className="fixed inset-0 bg-black/60 backdrop-blur-sm lg:hidden z-[90]"
+          className="fixed inset-0 bg-black/60 backdrop-blur-sm lg:hidden z-sidebar-overlay"
          onClick={() => setSidebarOpen(false)}
          aria-hidden="true"
        />
      )}

      <aside
+        data-testid="app-sidebar"
        className={cn(
-          'fixed left-6 bottom-6 top-20 rounded-xl flex flex-col transition-all duration-300 ease-out z-[95] overflow-hidden bg-[var(--sidebar)] backdrop-blur-md',
-          sidebarOpen ? 'w-64 translate-x-0 opacity-100' : '-translate-x-full lg:translate-x-0 lg:opacity-100 lg:w-20'
+          'fixed left-sidebar bottom-sidebar top-sidebar rounded-xl flex flex-col transition-shell z-sidebar overflow-hidden bg-[var(--sidebar)] backdrop-blur-md',
+          sidebarOpen ? 'w-sidebar-expanded translate-x-0 opacity-100' : '-translate-x-full lg:translate-x-0 lg:opacity-100 lg:w-sidebar-collapsed'
        )}
      >
        {/* Header — minimal Spotify-style */}
        <div className="px-4 py-4 flex items-center gap-3 relative">
-          <div className="w-8 h-8 rounded-lg bg-white/5 flex items-center justify-center flex-shrink-0">
+          <div className="w-8 h-8 rounded-lg bg-sidebar-accent flex items-center justify-center flex-shrink-0">
            <Cpu className="w-4 h-4 text-muted-foreground" />
          </div>

-          <div className={cn("transition-all duration-300 overflow-hidden min-w-0", sidebarOpen ? "opacity-100" : "w-0 opacity-0")}>
+          <div className={cn("transition-shell overflow-hidden min-w-0", sidebarOpen ? "opacity-100" : "w-0 opacity-0")}>
            <h2 className="text-sm font-semibold text-foreground truncate">
              System Hub
            </h2>
            <div className="flex items-center gap-1.5 mt-0.5">
-              <span className="w-1.5 h-1.5 rounded-full bg-primary shrink-0" />
+              <span className="w-1.5 h-1.5 rounded-full bg-primary shrink-0 animate-pulse" />
              <span className="text-xs text-muted-foreground truncate">
                Online
              </span>
@ -128,7 +129,7 @@ export const Sidebar: React.FC<SidebarProps> = ({ currentView, onNavigate, onLog
            size="icon"
            onClick={() => setSidebarOpen(!sidebarOpen)}
            className={cn(
-              "ml-auto text-muted-foreground hover:text-white hidden lg:flex hover:bg-white/5",
+              "ml-auto text-muted-foreground hover:text-white hidden lg:flex hover:bg-sidebar-accent",
              !sidebarOpen && "absolute left-1/2 -translate-x-1/2 top-1/2 -translate-y-1/2"
            )}
          >
@ -141,7 +142,7 @@ export const Sidebar: React.FC<SidebarProps> = ({ currentView, onNavigate, onLog
          {navItems.map((group, idx) => (
            <div key={idx}>
              <h3 className={cn(
-                "text-xs font-medium text-muted-foreground mb-2 px-3 transition-all duration-300",
+                "text-xs font-medium text-muted-foreground mb-2 px-3 transition-all duration-[var(--duration-normal)] uppercase tracking-wider",
                !sidebarOpen && "opacity-0 h-0 overflow-hidden mb-0 px-0"
              )}>
                {group.section}
@ -161,24 +162,25 @@ export const Sidebar: React.FC<SidebarProps> = ({ currentView, onNavigate, onLog
                        onNavigate?.(item.id);
                      }}
                      className={cn(
-                        'w-full flex items-center px-3 py-2 rounded-lg text-sm font-medium transition-colors duration-200 group relative',
+                        'w-full flex items-center px-3 py-2 rounded-lg text-sm font-medium transition-all duration-[var(--duration-fast)] group relative',
+                        'focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-primary/50 focus-visible:ring-offset-2 focus-visible:ring-offset-background',
                        isActive
-                          ? 'bg-white/10 text-foreground'
-                          : 'text-muted-foreground hover:text-foreground hover:bg-white/5',
+                          ? 'bg-primary/10 text-primary sidebar-active-indicator'
+                          : 'text-muted-foreground hover:text-foreground hover:bg-sidebar-accent',
                        !sidebarOpen && "justify-center px-0"
                      )}
                      title={!sidebarOpen ? item.label : undefined}
                    >
                      <div className={cn("flex items-center gap-3 relative z-10 min-w-0", !sidebarOpen && "justify-center")}>
                        <span className={cn(
-                          'shrink-0 transition-colors duration-200',
-                          isActive ? 'text-foreground' : 'text-muted-foreground group-hover:text-foreground'
+                          'shrink-0 transition-colors duration-[var(--duration-fast)]',
+                          isActive ? 'text-primary' : 'text-muted-foreground group-hover:text-foreground'
                        )}>
                          {item.icon}
                        </span>

                        <span className={cn(
-                          "transition-all duration-300 whitespace-nowrap truncate",
+                          "transition-all duration-[var(--duration-normal)] whitespace-nowrap truncate",
                          sidebarOpen ? "opacity-100" : "w-0 opacity-0 overflow-hidden"
                        )}>
                          {item.label}
@ -203,13 +205,14 @@ export const Sidebar: React.FC<SidebarProps> = ({ currentView, onNavigate, onLog
        </div>

        {/* Footer */}
-        <div className="p-2 border-t border-white/5">
+        <div className="p-2 border-t border-sidebar-border">
          <Link
            to="/settings"
            onClick={() => { handleMobileNav(); onNavigate?.('settings'); }}
            className={cn(
-              'flex items-center gap-3 px-3 py-2 rounded-lg text-sm transition-colors duration-200',
-              activeView === 'settings' ? 'bg-white/10 text-foreground' : 'text-muted-foreground hover:text-foreground hover:bg-white/5',
+              'flex items-center gap-3 px-3 py-2 rounded-lg text-sm transition-colors duration-[var(--duration-fast)]',
+              'focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-primary/50 focus-visible:ring-offset-2 focus-visible:ring-offset-background',
+              activeView === 'settings' ? 'bg-primary/10 text-primary' : 'text-muted-foreground hover:text-foreground hover:bg-sidebar-accent',
              !sidebarOpen && "justify-center px-0"
            )}
          >
--- a/apps/web/src/components/marketplace/ProductCard.tsx
+++ b/apps/web/src/components/marketplace/ProductCard.tsx
@ -29,7 +29,7 @@ export const ProductCard: React.FC<ProductCardProps> = ({
    >
    <Card
      variant="glass"
-      className="group p-0 overflow-hidden border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan transition-all duration-300 cursor-pointer"
+      className="group p-0 overflow-hidden border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan transition-all duration-[var(--duration-normal)] cursor-pointer"
      onClick={() => onClick(product)}
    >
      {/* Image & Overlay */}
@ -51,7 +51,7 @@ export const ProductCard: React.FC<ProductCardProps> = ({
        )}

        {/* Play Button Overlay */}
-        <div className="absolute inset-0 flex items-center justify-center opacity-0 group-hover:opacity-100 transition-opacity duration-300">
+        <div className="absolute inset-0 flex items-center justify-center opacity-0 group-hover:opacity-100 transition-opacity duration-[var(--duration-normal)]">
          <button
            onClick={(e) => {
              e.stopPropagation();
--- a/apps/web/src/components/player/FullPlayer.tsx
+++ b/apps/web/src/components/player/FullPlayer.tsx
@ -68,7 +68,7 @@ export const FullPlayer: React.FC<FullPlayerProps> = ({ onClose }) => {
      <div className="relative z-20 flex-1 flex flex-col md:flex-row items-center justify-center gap-12 px-8 pb-8 max-w-7xl mx-auto w-full">
        {/* Left: Artwork & Metadata */}
        <div
-          className={`flex flex-col items-center md:items-start text-center md:text-left transition-all duration-500 ${showLyrics ? 'md:w-1/3' : 'md:w-1/2'}`}
+          className={`flex flex-col items-center md:items-start text-center md:text-left transition-all duration-[var(--duration-slow)] ${showLyrics ? 'md:w-1/3' : 'md:w-1/2'}`}
        >
          <div
            className="aspect-square w-full max-w-[400px] rounded-2xl overflow-hidden shadow-2xl mb-8 border border-white/10 relative group cursor-pointer"
--- a/apps/web/src/components/player/LyricsPanel.tsx
+++ b/apps/web/src/components/player/LyricsPanel.tsx
@ -66,7 +66,7 @@ export const LyricsPanel: React.FC = () => {
            return (
              <p
                key={i}
-                className={`text-2xl md:text-3xl font-bold transition-all duration-500 cursor-pointer hover:text-white ${isActive ? 'text-white scale-105 origin-center' : 'text-white/20 blur-[1px]'}`}
+                className={`text-2xl md:text-3xl font-bold transition-all duration-[var(--duration-slow)] cursor-pointer hover:text-white ${isActive ? 'text-white scale-105 origin-center' : 'text-white/20 blur-[1px]'}`}
                onClick={() => seek((line.time / duration) * 100)}
              >
                {line.text}
--- a/apps/web/src/components/player/MiniPlayer.tsx
+++ b/apps/web/src/components/player/MiniPlayer.tsx
@ -45,7 +45,7 @@ export const MiniPlayer: React.FC<MiniPlayerProps> = ({
            className="w-full h-full object-cover"
          />
          <div
-            className="absolute inset-0 bg-black/40 hidden group-hover:flex items-center justify-center transition-opacity"
+            className="absolute inset-0 bg-black/40 hidden group-hover:flex items-center justify-center transition-opacity duration-[var(--duration-fast)]"
            onClick={onExpand}
          >
            <Maximize2 className="w-5 h-5 text-white" />
@ -53,17 +53,17 @@ export const MiniPlayer: React.FC<MiniPlayerProps> = ({
        </div>
        <div className="flex flex-col min-w-0 flex-1">
          <h4
-            className="text-foreground font-semibold truncate text-sm hover:text-primary transition-colors cursor-pointer"
+            className="text-foreground font-semibold truncate text-sm hover:text-primary transition-colors duration-[var(--duration-fast)] cursor-pointer"
            onClick={onExpand}
          >
            {currentTrack.title}
          </h4>
-          <p className="text-muted-foreground text-xs truncate cursor-pointer hover:text-foreground transition-colors" onClick={onExpand}>
+          <p className="text-muted-foreground text-xs truncate cursor-pointer hover:text-foreground transition-colors duration-[var(--duration-fast)]" onClick={onExpand}>
            {currentTrack.artist}
          </p>
        </div>
        <button
-          className="text-muted-foreground hover:text-primary transition-colors flex-shrink-0 p-1 rounded-full hover:bg-white/5"
+          className="text-muted-foreground hover:text-primary transition-colors duration-[var(--duration-fast)] flex-shrink-0 p-1 rounded-full hover:bg-white/5"
          onClick={() => addToast('Added to Liked Songs')}
          aria-label="Save to library"
        >
@ -75,7 +75,7 @@ export const MiniPlayer: React.FC<MiniPlayerProps> = ({
      <div className="flex flex-col items-center justify-center flex-1 min-w-0 max-w-xl px-4">
        <PlayerControls layout="compact" />
        <div className="w-full flex items-center gap-3 mt-0.5">
-          <span className="text-[10px] text-muted-foreground tabular-nums w-7 text-right shrink-0">
+          <span className="text-xs text-muted-foreground tabular-nums w-7 text-right shrink-0">
            {formatTime(currentTime)}
          </span>
          <div
@ -91,7 +91,7 @@ export const MiniPlayer: React.FC<MiniPlayerProps> = ({
              style={{ left: `${progress}%` }}
            />
          </div>
-          <span className="text-[10px] text-muted-foreground tabular-nums w-7 shrink-0">
+          <span className="text-xs text-muted-foreground tabular-nums w-7 shrink-0">
            {formatTime(duration)}
          </span>
        </div>
--- a/apps/web/src/components/player/PlayerControls.tsx
+++ b/apps/web/src/components/player/PlayerControls.tsx
@ -84,7 +84,7 @@ export const PlayerControls: React.FC<PlayerControlsProps> = ({
        </button>
        <button
          onClick={togglePlay}
-          className={`${layout === 'full' ? 'w-14 h-14' : 'w-9 h-9'} rounded-full bg-primary text-primary-foreground flex items-center justify-center transition-all duration-[var(--duration-immersive)] ease-in-out hover:opacity-90 shadow-[0_0_24px_var(--color-primary)/0.4]`}
+          className={`${layout === 'full' ? 'w-14 h-14' : 'w-9 h-9'} rounded-full bg-primary text-primary-foreground flex items-center justify-center transition-all duration-[var(--duration-immersive)] ease-in-out hover:opacity-90 shadow-button-primary-glow`}
        >
          {isPlaying ? (
            <Pause
--- a/apps/web/src/components/social/ExploreView.tsx
+++ b/apps/web/src/components/social/ExploreView.tsx
@ -154,7 +154,7 @@ export const ExploreView: React.FC = () => {
            >
              <img
                src={item.thumbnail}
-                className="w-full h-full object-cover transition-opacity duration-200 opacity-80 group-hover:opacity-100"
+                className="w-full h-full object-cover transition-opacity duration-[var(--duration-fast)] opacity-80 group-hover:opacity-100"
              />

              {/* Overlay */}
--- a/apps/web/src/components/social/groups/GroupCard.tsx
+++ b/apps/web/src/components/social/groups/GroupCard.tsx
@ -28,11 +28,11 @@ export const GroupCard: React.FC<GroupCardProps> = ({
      <div className="h-32 relative overflow-hidden bg-kodo-ink">
        <img
          src={group.coverUrl}
-          className="w-full h-full object-cover transition-opacity duration-200 opacity-80 group-hover:opacity-100"
+          className="w-full h-full object-cover transition-opacity duration-[var(--duration-fast)] opacity-80 group-hover:opacity-100"
        />
        <div className="absolute top-2 right-2">
          <span
-            className={`px-2 py-1 rounded text-[10px] font-bold uppercase backdrop-blur-md flex items-center gap-1 ${group.isPrivate ? 'bg-black/60 text-kodo-gold' : 'bg-black/60 text-kodo-cyan'}`}
+            className={`px-2 py-1 rounded text-xs font-bold uppercase backdrop-blur-md flex items-center gap-1 ${group.isPrivate ? 'bg-black/60 text-kodo-gold' : 'bg-black/60 text-kodo-cyan'}`}
          >
            {group.isPrivate ? (
              <Lock className="w-3 h-3" />
--- a/apps/web/src/components/theme/ThemeSwitcher.tsx
+++ b/apps/web/src/components/theme/ThemeSwitcher.tsx
@ -59,7 +59,7 @@ export function ThemeSwitcher({
          <button
            key={theme.id}
            onClick={() => onThemeChange(theme.id)}
-            className={`group relative p-8 rounded-2xl border-2 transition-all duration-300 text-left overflow-hidden ${
+            className={`group relative p-8 rounded-2xl border-2 transition-all duration-[var(--duration-normal)] text-left overflow-hidden ${
              currentTheme === theme.id
                ? 'border-kodo-cyan bg-kodo-cyan/10 shadow-lg shadow-kodo-cyan/20'
                : 'border-white/10 bg-kodo-graphite/50 hover:border-white/30 hover:bg-kodo-graphite'
--- a/apps/web/src/components/ui/ErrorDisplay.tsx
+++ b/apps/web/src/components/ui/ErrorDisplay.tsx
@ -190,7 +190,7 @@ export const ErrorDisplay = React.forwardRef<HTMLDivElement, ErrorDisplayProps>(
  };

  const errorContent = (
-    <div ref={ref} role="alert" aria-live="polite" className={cn('rounded-lg border flex shadow-[0_0_15px_rgba(0,0,0,0.1)]', colorStyles.bg, colorStyles.border, colorStyles.text, sizeStyles.padding, sizeStyles.gap, className)} {...props}>
+    <div ref={ref} role="alert" aria-live="polite" className={cn('rounded-lg border flex shadow-card', colorStyles.bg, colorStyles.border, colorStyles.text, sizeStyles.padding, sizeStyles.gap, className)} {...props}>
      <div className="flex-shrink-0 pt-0.5">{iconConfig}</div>
      <div className="flex-1 min-w-0">
        <div className={cn('font-semibold mb-1', sizeStyles.title)}>{title}</div>
--- a/apps/web/src/components/ui/FAB.tsx
+++ b/apps/web/src/components/ui/FAB.tsx
@ -98,8 +98,8 @@ export function FAB({
        variant="default"
        className={cn(
          'rounded-full aspect-square p-0',
-          'shadow-[0_0_30px_rgba(102,252,241,0.5)] hover:shadow-[0_0_40px_rgba(102,252,241,0.7)]',
-          'transition-all duration-300',
+          'shadow-fab-glow shadow-fab-glow-hover',
+          'transition-all duration-[var(--duration-normal)]',
          'active:opacity-80',
          sizeClasses[size],
          className,
--- a/apps/web/src/components/ui/KodoEmptyState.tsx
+++ b/apps/web/src/components/ui/KodoEmptyState.tsx
@ -29,7 +29,7 @@ export function KodoEmptyState({
      )}
    >
      {/* Subtle ambient orbs */}
-      <div className="absolute inset-0 opacity-[0.12] group-hover:opacity-20 transition-opacity duration-500 pointer-events-none">
+      <div className="absolute inset-0 opacity-[0.12] group-hover:opacity-20 transition-opacity duration-[var(--duration-slow)] pointer-events-none">
        <div className="absolute top-1/4 left-1/4 w-64 h-64 bg-primary/40 rounded-full blur-3xl" />
        <div className="absolute bottom-1/4 right-1/4 w-64 h-64 bg-primary/30 rounded-full blur-3xl" />
      </div>
--- a/apps/web/src/components/ui/Sidebar.tsx
+++ b/apps/web/src/components/ui/Sidebar.tsx
@ -136,7 +136,7 @@ export function Sidebar({
      
      <aside
        className={cn(
-          'flex flex-col transition-all duration-300 ease-in-out',
+          'flex flex-col transition-all duration-[var(--duration-normal)] ease-in-out',
          position === 'left' ? 'border-r' : 'border-l',
          'border-white/10 bg-kodo-ink/40 backdrop-blur-md rounded-xl',
          isCollapsed ? 'w-0 overflow-hidden' : width,
--- a/apps/web/src/components/ui/accordion/AccordionContent.tsx
+++ b/apps/web/src/components/ui/accordion/AccordionContent.tsx
@ -9,7 +9,7 @@ export const AccordionContent = React.forwardRef<
  <div
    ref={ref}
    className={cn(
-      'overflow-hidden text-sm transition-all duration-300 ease-in-out',
+      'overflow-hidden text-sm transition-all duration-[var(--duration-normal)] ease-[var(--ease-in-out)]',
      open ? 'max-h-none opacity-100' : 'max-h-0 opacity-0',
      className,
    )}
--- a/apps/web/src/components/ui/badge.tsx
+++ b/apps/web/src/components/ui/badge.tsx
@ -139,8 +139,8 @@ export const Badge = React.forwardRef<HTMLSpanElement, BadgeProps>(
    };

    const sizeStyles = {
-      sm: 'px-2 py-0.5 text-[10px]',
-      md: 'px-2.5 py-0.5 text-[10px]',
+      sm: 'px-2 py-0.5 text-xs',
+      md: 'px-2.5 py-0.5 text-xs',
      lg: 'px-4 py-1 text-xs',
    };

@ -162,7 +162,7 @@ export const Badge = React.forwardRef<HTMLSpanElement, BadgeProps>(
        {icon && <span className="w-3 h-3">{icon}</span>}
        {displayText}
        {count !== undefined && count > 0 && (
-          <span className="ml-1 px-1.5 py-0.5 rounded-full bg-current/20 text-[10px]">
+          <span className="ml-1 px-1.5 py-0.5 rounded-full bg-current/20 text-xs">
            {count}
          </span>
        )}
--- a/apps/web/src/components/ui/button.tsx
+++ b/apps/web/src/components/ui/button.tsx
@ -14,10 +14,10 @@ const buttonVariants = cva(
      variant: {
        /** Primary action button - main CTAs, submit */
        default:
-          'bg-primary text-primary-foreground hover:bg-primary/90 hover:shadow-[0_0_20px_var(--primary)/0.25] border border-transparent font-semibold',
+          'bg-primary text-primary-foreground hover:bg-primary/90 hover:shadow-button-primary-glow border border-transparent font-semibold',
        /** Primary alias for Design System compatibility */
        primary:
-          'bg-primary text-primary-foreground hover:bg-primary/90 hover:shadow-[0_0_20px_var(--primary)/0.25] border border-transparent font-semibold',
+          'bg-primary text-primary-foreground hover:bg-primary/90 hover:shadow-button-primary-glow border border-transparent font-semibold',
        /** Destructive actions - delete, remove, clear */
        destructive:
          'bg-destructive/10 text-destructive hover:bg-destructive/20 border border-destructive/30 hover:border-destructive/50',
--- a/apps/web/src/components/ui/card.tsx
+++ b/apps/web/src/components/ui/card.tsx
@ -30,17 +30,17 @@ const cardVariants = cva(
          'bg-card border-0 shadow-lg shadow-black/5 cursor-pointer hover:shadow-xl hover:-translate-y-0.5',

        glow:
-          'bg-card border-0 shadow-lg hover:shadow-[0_0_30px_oklch(0.75_0.18_195_/_0.15)]',
+          'bg-card border-0 shadow-lg hover:shadow-card-glow-cyan',

        glowMagenta:
-          'bg-card border-0 shadow-lg hover:shadow-[0_0_30px_oklch(0.65_0.25_330_/_0.15)]',
+          'bg-card border-0 shadow-lg hover:shadow-card-glow-magenta',

        spotlight:
          'bg-black/40 border border-white/10 hover:border-white/20',

        /* Immersive surface: subtle border, lighter + diffuse shadow on hover */
        surface:
-          'bg-card border border-white/5 shadow-none hover:bg-card/90 hover:border-white/10 hover:shadow-[0_8px_30px_rgba(0,0,0,0.25)] transition-all duration-[var(--duration-immersive)] ease-in-out',
+          'bg-card border border-white/5 shadow-none hover:bg-card/90 hover:border-white/10 hover:shadow-card-hover transition-all duration-[var(--duration-immersive)] ease-in-out',
      },
      padding: {
        none: '',
@ -99,7 +99,7 @@ function Card({ className, variant, padding, spotlight, spotlightColor = 'rgba(2
    >
      {isSpotlight && (
        <div
-          className="pointer-events-none absolute -inset-px opacity-0 transition duration-300"
+          className="pointer-events-none absolute -inset-px opacity-0 transition duration-[var(--duration-normal)]"
          style={{
            opacity,
            background: `radial-gradient(600px circle at ${position.x}px ${position.y}px, ${spotlightColor}, transparent 40%)`,
--- a/apps/web/src/components/ui/checkbox.tsx
+++ b/apps/web/src/components/ui/checkbox.tsx
@ -109,16 +109,16 @@ export const Checkbox = React.forwardRef<HTMLInputElement, CheckboxProps>(
            w-5 h-5 rounded border border-kodo-steel bg-kodo-graphite
            peer-checked:bg-kodo-cyan peer-checked:border-kodo-steel
            peer-focus:ring-2 peer-focus:ring-kodo-steel/30
-            transition-all duration-200
+            transition-all duration-[var(--duration-fast)]
          "
          ></div>
          <Check
-            className="w-3.5 h-3.5 text-black absolute top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 opacity-0 peer-checked:opacity-100 transition-opacity pointer-events-none"
+            className="w-3.5 h-3.5 text-black absolute top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 opacity-0 peer-checked:opacity-100 transition-opacity duration-[var(--duration-fast)] pointer-events-none"
            strokeWidth={3}
          />
        </div>
        {label && (
-          <span className="text-sm text-kodo-text-main group-hover:text-white transition-colors select-none">
+          <span className="text-sm text-kodo-text-main group-hover:text-white transition-colors duration-[var(--duration-fast)] select-none">
            {label}
          </span>
        )}
--- a/apps/web/src/components/ui/collapsible.tsx
+++ b/apps/web/src/components/ui/collapsible.tsx
@ -118,14 +118,14 @@ export function Collapsible({
      >
        <div className="flex-1 text-left">{trigger}</div>
        {showChevron && (
-          <ChevronIcon className="w-4 h-4 text-kodo-secondary transition-transform duration-200" />
+          <ChevronIcon className="w-4 h-4 text-kodo-secondary transition-transform duration-[var(--duration-fast)]" />
        )}
      </button>
      
      <div
        id="collapsible-content"
        className={cn(
-          'overflow-hidden transition-all duration-300 ease-in-out',
+          'overflow-hidden transition-all duration-[var(--duration-normal)] ease-in-out',
          isOpen ? 'max-h-[5000px] opacity-100' : 'max-h-0 opacity-0',
          contentClassName,
        )}
--- a/apps/web/src/components/ui/dropdown-menu/DropdownMenuItem.tsx
+++ b/apps/web/src/components/ui/dropdown-menu/DropdownMenuItem.tsx
@ -22,7 +22,7 @@ export const DropdownMenuItem = React.forwardRef<
      role="menuitem"
      className={cn(
        'relative flex cursor-default select-none items-center rounded-sm px-2 py-1.5 text-sm outline-none',
-        'transition-colors focus:bg-white/5 focus:text-white disabled:pointer-events-none disabled:opacity-50',
+        'transition-colors duration-[var(--duration-fast)] focus-visible:bg-white/5 focus-visible:text-foreground focus-visible:ring-2 focus-visible:ring-ring/50 focus-visible:ring-inset disabled:pointer-events-none disabled:opacity-50',
        'text-foreground hover:bg-muted/50 w-full text-left',
        inset && 'pl-8',
        className,
--- a/apps/web/src/components/ui/dropdown-menu/DropdownMenuTrigger.tsx
+++ b/apps/web/src/components/ui/dropdown-menu/DropdownMenuTrigger.tsx
@ -14,7 +14,15 @@ export const DropdownMenuTrigger = React.forwardRef<
    } as React.HTMLAttributes<HTMLElement>);
  }
  return (
-    <button ref={ref} type="button" className={cn('outline-none', className)} {...props}>
+    <button
+      ref={ref}
+      type="button"
+      className={cn(
+        'outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 focus-visible:ring-offset-background',
+        className,
+      )}
+      {...props}
+    >
      {children}
    </button>
  );
--- a/apps/web/src/components/ui/dropdown.tsx
+++ b/apps/web/src/components/ui/dropdown.tsx
@ -191,7 +191,7 @@ export function Dropdown({
          <div
            ref={menuRef}
            className={cn(
-              'absolute z-50 mt-2 min-w-[8rem] bg-card border border-border rounded-xl shadow-lg',
+              'absolute z-50 mt-2 min-w-32 bg-card border border-border rounded-xl shadow-lg',
              'overflow-hidden',
              alignClasses[align],
            )}
--- a/apps/web/src/components/ui/floating-input.tsx
+++ b/apps/web/src/components/ui/floating-input.tsx
@ -21,7 +21,7 @@ const FloatingInput = React.forwardRef<HTMLInputElement, FloatingInputProps>(
                        type={type}
                        id={inputId}
                        className={cn(
-                            "block px-4 pb-2.5 pt-5 w-full text-sm text-white bg-kodo-graphite/40 rounded-xl border appearance-none focus:outline-none focus:ring-0 peer transition-all duration-200",
+                            "block px-4 pb-2.5 pt-5 w-full text-sm text-white bg-kodo-graphite/40 rounded-xl border appearance-none focus:outline-none focus:ring-0 peer transition-all duration-[var(--duration-fast)]",
                            // Borders & Colors
                            error
                                ? "border-kodo-red focus:border-kodo-red"
@ -38,7 +38,7 @@ const FloatingInput = React.forwardRef<HTMLInputElement, FloatingInputProps>(

                    {/* Icon */}
                    {icon && (
-                        <div className="absolute left-3.5 top-1/2 -translate-y-1/2 text-kodo-text-dim peer-focus:text-kodo-cyan transition-colors pointer-events-none">
+                        <div className="absolute left-3.5 top-1/2 -translate-y-1/2 text-kodo-text-dim peer-focus:text-kodo-cyan transition-colors duration-[var(--duration-fast)] pointer-events-none">
                            {icon}
                        </div>
                    )}
@ -47,7 +47,7 @@ const FloatingInput = React.forwardRef<HTMLInputElement, FloatingInputProps>(
                    <label
                        htmlFor={inputId}
                        className={cn(
-                            "absolute text-sm duration-200 transform -translate-y-3 scale-75 top-4 z-10 origin-[0] peer-placeholder-shown:scale-100 peer-placeholder-shown:translate-y-0 peer-focus:scale-75 peer-focus:-translate-y-3 pointer-events-none",
+                            "absolute text-sm duration-[var(--duration-fast)] transform -translate-y-3 scale-75 top-4 z-10 origin-[0] peer-placeholder-shown:scale-100 peer-placeholder-shown:translate-y-0 peer-focus:scale-75 peer-focus:-translate-y-3 pointer-events-none transition-transform",
                            icon ? "left-11 peer-focus:left-11 peer-placeholder-shown:left-11" : "left-4 peer-focus:left-4 peer-placeholder-shown:left-4",
                            error
                                ? "text-kodo-red"
--- a/apps/web/src/components/ui/input.tsx
+++ b/apps/web/src/components/ui/input.tsx
@ -18,7 +18,7 @@ const Input = React.forwardRef<HTMLInputElement, InputProps>(
        {label && <Label htmlFor={id} className="text-xs font-mono text-muted-foreground uppercase tracking-widest">{label}</Label>}
        <div className="relative group">
          {icon && (
-            <div className="absolute left-3 top-1/2 -translate-y-1/2 text-muted-foreground group-focus-within:text-primary transition-colors pointer-events-none">
+            <div className="absolute left-3 top-1/2 -translate-y-1/2 text-muted-foreground group-focus-within:text-primary transition-colors duration-[var(--duration-fast)] pointer-events-none">
              {icon}
            </div>
          )}
@ -27,7 +27,7 @@ const Input = React.forwardRef<HTMLInputElement, InputProps>(
            type={type}
            className={cn(
              "flex h-11 w-full rounded-xl border border-white/10 bg-black/40 px-3 py-2 text-sm text-white placeholder:text-muted-foreground/50 file:border-0 file:bg-transparent file:text-sm file:font-medium disabled:cursor-not-allowed disabled:opacity-50",
-              "backdrop-blur-sm transition-all duration-200",
+              "backdrop-blur-sm transition-all duration-[var(--duration-fast)]",
              "focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-primary/30 focus-visible:border-primary/50",
              "hover:bg-white/5 hover:border-white/20",
              icon && "pl-10",
--- a/apps/web/src/components/ui/lazy-component/LazyErrorFallback.tsx
+++ b/apps/web/src/components/ui/lazy-component/LazyErrorFallback.tsx
@ -25,7 +25,7 @@ export function LazyErrorFallback({
  onRetry,
 }: LazyErrorFallbackProps) {
  return (
-    <div className="flex flex-col items-center justify-center min-h-layout-page-sm p-8 text-center animate-in fade-in zoom-in duration-300">
+    <div className="flex flex-col items-center justify-center min-h-layout-page-sm p-8 text-center animate-in fade-in zoom-in duration-[var(--duration-normal)]">
      <div className="bg-kodo-ink/50 border border-kodo-steel/30 rounded-xl p-8 max-w-md w-full shadow-lg backdrop-blur-sm">
        <div className="w-16 h-16 bg-kodo-red/10 rounded-full flex items-center justify-center mx-auto mb-6">
          <AlertTriangle className="h-8 w-8 text-kodo-red" />
--- a/apps/web/src/components/ui/optimized-image/OptimizedImage.tsx
+++ b/apps/web/src/components/ui/optimized-image/OptimizedImage.tsx
@ -131,7 +131,7 @@ export function OptimizedImage({
        alt={alt}
        width={width}
        height={height}
-        className={`transition-opacity duration-300 ${
+        className={`transition-opacity duration-[var(--duration-normal)] ${
          isLoaded ? 'opacity-100' : 'opacity-0'
        } ${className}`}
        onLoad={handleImageLoad}
--- a/apps/web/src/components/ui/progress.tsx
+++ b/apps/web/src/components/ui/progress.tsx
@ -139,14 +139,14 @@ export const Progress = React.forwardRef<HTMLDivElement, ProgressProps>(
          <div className="h-4 bg-kodo-void rounded-full overflow-hidden border border-kodo-gold/30">
            <div
              className={cn(
-                'h-full bg-gradient-to-r shadow-[0_0_10px_rgba(255,215,0,0.5)] transition-all duration-500',
+                'h-full bg-gradient-to-r shadow-gold-glow transition-all duration-[var(--duration-slow)]',
                gradientStyles.gold,
              )}
              style={{ width: `${percentage}%` }}
            />
          </div>
          {(labelLeft || labelRight) && (
-            <div className="flex justify-between text-[10px] font-mono font-bold text-kodo-gold mt-1 uppercase tracking-wider">
+            <div className="flex justify-between text-xs font-mono font-bold text-kodo-gold mt-1 uppercase tracking-wider">
              <span>{labelLeft}</span>
              <span>{labelRight}</span>
            </div>
@ -160,7 +160,7 @@ export const Progress = React.forwardRef<HTMLDivElement, ProgressProps>(
        <div className="h-2 bg-kodo-steel rounded-full overflow-hidden">
          <div
            className={cn(
-              'h-full transition-all duration-300 shadow-[0_0_10px_currentColor]',
+              'h-full transition-all duration-[var(--duration-normal)] shadow-slider-thumb',
              colorStyles[color],
            )}
            style={{ width: `${percentage}%` }}
--- a/apps/web/src/components/ui/slider.tsx
+++ b/apps/web/src/components/ui/slider.tsx
@ -131,7 +131,7 @@ const Slider = React.forwardRef<HTMLInputElement, SliderProps>(
      >
        <div className="relative h-2 w-full grow overflow-hidden rounded-full bg-muted">
          <div
-            className="absolute h-full bg-primary transition-all shadow-[0_0_10px_oklch(0.75_0.18_195_/_0.5)]"
+            className="absolute h-full bg-primary transition-all duration-[var(--duration-fast)] shadow-slider-thumb"
            style={{ width: `${percentage}%` }}
          />
        </div>
@ -155,7 +155,7 @@ const Slider = React.forwardRef<HTMLInputElement, SliderProps>(
        />
        <div
          className={cn(
-            'absolute h-5 w-5 rounded-full border-2 border-primary bg-background ring-offset-background transition-transform pointer-events-none shadow-[0_0_10px_oklch(0.75_0.18_195_/_0.5)]',
+            'absolute h-5 w-5 rounded-full border-2 border-primary bg-background ring-offset-background transition-transform duration-[var(--duration-fast)] pointer-events-none shadow-slider-thumb',
            disabled && 'opacity-50',
          )}
          style={{ left: `calc(${percentage}% - 10px)` }}
--- a/apps/web/src/components/ui/textarea.tsx
+++ b/apps/web/src/components/ui/textarea.tsx
@ -88,7 +88,7 @@ const Textarea = React.forwardRef<HTMLTextAreaElement, TextareaProps>(
            'font-body text-base',
            'rounded-lg',
            'focus:outline-none focus:border-kodo-steel focus:ring-1 focus:ring-kodo-steel',
-            'transition-all duration-200',
+            'transition-all duration-[var(--duration-fast)]',
            'min-h-[100px] resize-y',
            className,
          )}
--- a/apps/web/src/components/upload/BulkUploadModal.tsx
+++ b/apps/web/src/components/upload/BulkUploadModal.tsx
@ -50,13 +50,13 @@ export const BulkUploadModal: React.FC<BulkUploadModalProps> = ({

        {/* Global Progress */}
        <div className="px-6 py-2 bg-kodo-slate/30 border-b border-kodo-steel">
-          <div className="flex justify-between text-[10px] font-bold text-muted-foreground uppercase mb-1">
+          <div className="flex justify-between text-xs font-bold text-muted-foreground uppercase mb-1">
            <span>Overall Progress</span>
            <span>{Math.round(totalProgress)}%</span>
          </div>
          <div className="h-1 bg-muted rounded-full overflow-hidden">
            <div
-              className="h-full bg-kodo-cyan transition-all duration-300"
+              className="h-full bg-kodo-cyan transition-all duration-[var(--duration-normal)]"
              style={{ width: `${totalProgress}%` }}
            ></div>
          </div>
--- a/apps/web/src/components/upload/FileUploadZone.tsx
+++ b/apps/web/src/components/upload/FileUploadZone.tsx
@ -65,7 +65,7 @@ export const FileUploadZone: React.FC<FileUploadZoneProps> = ({
      onDragLeave={() => setIsDragging(false)}
      onDrop={handleDrop}
      className={`
-        border-2 border-dashed rounded-xl p-12 flex flex-col items-center justify-center text-center transition-all duration-300 group cursor-pointer
+        border-2 border-dashed rounded-xl p-12 flex flex-col items-center justify-center text-center transition-all duration-[var(--duration-normal)] group cursor-pointer
        ${
          isDragging
            ? 'border-primary bg-primary/10 scale-[1.02]'
@ -87,7 +87,7 @@ export const FileUploadZone: React.FC<FileUploadZoneProps> = ({
      >
        <div
          className={`
-          w-20 h-20 rounded-full flex items-center justify-center mb-6 transition-all duration-300 shadow-lg
+          w-20 h-20 rounded-full flex items-center justify-center mb-6 transition-all duration-[var(--duration-normal)] shadow-lg
          ${isDragging ? 'bg-kodo-cyan text-black' : 'bg-muted text-primary group-hover:bg-border'}
        `}
        >
@ -105,13 +105,13 @@ export const FileUploadZone: React.FC<FileUploadZoneProps> = ({
          {acceptedFormats.map((fmt) => (
            <span
              key={fmt}
-              className="px-2 py-1 bg-black/30 rounded text-[10px] font-mono text-muted-foreground border border-white/5 uppercase"
+              className="px-2 py-1 bg-black/30 rounded text-xs font-mono text-muted-foreground border border-white/5 uppercase"
            >
              {fmt.replace('.', '')}
            </span>
          ))}
        </div>
-        <p className="mt-4 text-[10px] text-muted-foreground">
+        <p className="mt-4 text-xs text-muted-foreground">
          Max file size: {maxSizeInMB}MB
        </p>
      </label>
--- a/apps/web/src/components/upload/UploadProgressBar.tsx
+++ b/apps/web/src/components/upload/UploadProgressBar.tsx
@ -30,13 +30,13 @@ export const UploadProgressBar: React.FC<UploadProgressBarProps> = ({
  return (
    <div className="w-full flex items-center gap-4">
      <div className="flex-1">
-        <div className="flex justify-between text-[10px] uppercase font-bold text-muted-foreground mb-1">
+        <div className="flex justify-between text-xs uppercase font-bold text-muted-foreground mb-1">
          <span>{status}</span>
          <span>{Math.round(progress)}%</span>
        </div>
        <div className="h-1.5 bg-muted rounded-full overflow-hidden">
          <div
-            className={`h-full transition-all duration-300 ${getColor()} ${status === 'uploading' ? 'animate-pulse' : ''}`}
+            className={`h-full transition-all duration-[var(--duration-normal)] ${getColor()} ${status === 'uploading' ? 'animate-pulse' : ''}`}
            style={{ width: `${progress}%` }}
          />
        </div>
--- a/apps/web/src/components/views/admin-view/AdminViewSidebar.tsx
+++ b/apps/web/src/components/views/admin-view/AdminViewSidebar.tsx
@ -16,7 +16,7 @@ export function AdminViewSidebar({
 }: AdminViewSidebarProps) {
  return (
    <div className="w-full lg:w-64 flex-shrink-0">
-      <Card variant="glass" className="mb-6 p-4 border-destructive/30 bg-destructive/5 backdrop-blur-xl hover-glow-cyan transition-shadow duration-300">
+      <Card variant="glass" className="mb-6 p-4 border-destructive/30 bg-destructive/5 backdrop-blur-xl hover-glow-cyan transition-shadow duration-[var(--duration-normal)]">
        <div className="flex items-center gap-4">
          <ShieldAlert className="w-6 h-6 text-destructive" />
          <div>
--- a/apps/web/src/components/views/checkout-view/CheckoutViewOrderSummary.tsx
+++ b/apps/web/src/components/views/checkout-view/CheckoutViewOrderSummary.tsx
@ -20,7 +20,7 @@ export function CheckoutViewOrderSummary({
  onPurchase,
 }: CheckoutViewOrderSummaryProps) {
  return (
-    <Card variant="glass" className="rounded-[var(--radius-xl)] p-8 sticky top-24 border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan transition-shadow duration-300">
+    <Card variant="glass" className="rounded-[var(--radius-xl)] p-8 sticky top-24 border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan transition-shadow duration-[var(--duration-normal)]">
      <h3 className="font-bold text-foreground mb-4 uppercase tracking-wider text-sm tracking-tight">
        Order Summary
      </h3>
--- a/apps/web/src/components/views/discover-view/DiscoverViewHero.tsx
+++ b/apps/web/src/components/views/discover-view/DiscoverViewHero.tsx
@ -25,7 +25,7 @@ export function DiscoverViewHero({ onPlayWeekly }: DiscoverViewHeroProps) {
          <img
            src="https://picsum.photos/id/88/800/400"
            alt=""
-            className="absolute inset-0 w-full h-full object-cover opacity-60 group-hover:opacity-40 transition-opacity duration-200"
+            className="absolute inset-0 w-full h-full object-cover opacity-60 group-hover:opacity-40 transition-opacity duration-[var(--duration-fast)]"
          />
          <div className="absolute inset-0 bg-gradient-to-t from-black via-black/50 to-transparent" aria-hidden />
          <div className="relative z-10 w-full">
--- a/apps/web/src/components/views/file-manager-view/FileManagerViewGrid.tsx
+++ b/apps/web/src/components/views/file-manager-view/FileManagerViewGrid.tsx
@ -54,7 +54,7 @@ export function FileManagerViewGrid({
              <Square className="w-4 h-4 text-muted-foreground hover:text-white" />
            )}
          </button>
-          <div className="w-16 h-16 rounded-2xl bg-muted flex items-center justify-center shadow-lg transition-colors duration-200">
+          <div className="w-16 h-16 rounded-2xl bg-muted flex items-center justify-center shadow-lg transition-colors duration-[var(--duration-fast)]">
            <FileTypeIcon type={file.type} size="lg" />
          </div>
          <div className="w-full min-w-0">
--- a/apps/web/src/components/views/live-view/LiveViewChat.tsx
+++ b/apps/web/src/components/views/live-view/LiveViewChat.tsx
@ -22,7 +22,7 @@ export function LiveViewChat({
  return (
    <Card
      variant="glass"
-      className="lg:col-span-3 flex flex-col p-0 overflow-hidden h-full min-h-0 border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan transition-shadow duration-300"
+      className="lg:col-span-3 flex flex-col p-0 overflow-hidden h-full min-h-0 border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan transition-shadow duration-[var(--duration-normal)]"
    >
      <div className="p-4 border-b border-border flex justify-between items-center bg-card">
        <span className="font-mono text-sm font-bold text-foreground tracking-tight">
--- a/apps/web/src/components/views/live-view/LiveViewPlayer.tsx
+++ b/apps/web/src/components/views/live-view/LiveViewPlayer.tsx
@ -34,7 +34,7 @@ export function LiveViewPlayer({
        </span>
      </div>

-      <div className="absolute bottom-0 left-0 right-0 p-4 flex justify-between items-end opacity-0 group-hover:opacity-100 transition-opacity duration-300">
+      <div className="absolute bottom-0 left-0 right-0 p-4 flex justify-between items-end opacity-0 group-hover:opacity-100 transition-opacity duration-[var(--duration-normal)]">
        <div className="flex gap-4">
          <Button
            variant="ghost"
--- a/apps/web/src/components/views/live-view/LiveViewRecommended.tsx
+++ b/apps/web/src/components/views/live-view/LiveViewRecommended.tsx
@ -22,7 +22,7 @@ export function LiveViewRecommended({ onChannelClick }: LiveViewRecommendedProps
          <motion.div key={i} variants={{ hidden: { opacity: 0, y: 8 }, visible: { opacity: 1, y: 0 } }}>
          <Card
            variant="glass"
-            className="p-0 overflow-hidden group cursor-pointer border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan transition-all duration-300"
+            className="p-0 overflow-hidden group cursor-pointer border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan transition-all duration-[var(--duration-normal)]"
            onClick={() => onChannelClick?.(i)}
          >
            <div className="aspect-video relative">
--- a/apps/web/src/components/views/live-view/LiveViewStreamInfo.tsx
+++ b/apps/web/src/components/views/live-view/LiveViewStreamInfo.tsx
@ -21,7 +21,7 @@ export function LiveViewStreamInfo({
  onShare,
 }: LiveViewStreamInfoProps) {
  return (
-    <Card variant="glass" className="p-6 border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan transition-shadow duration-300">
+    <Card variant="glass" className="p-6 border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan transition-shadow duration-[var(--duration-normal)]">
    <div className="flex justify-between items-start">
      <div className="flex gap-4">
        <div className="w-12 h-12 rounded-full bg-gradient-neon p-0.5">
--- a/apps/web/src/components/views/marketplace-view/MarketplaceViewHeader.tsx
+++ b/apps/web/src/components/views/marketplace-view/MarketplaceViewHeader.tsx
@ -9,7 +9,7 @@ interface MarketplaceViewHeaderProps {

 export function MarketplaceViewHeader({ searchQuery, onSearchChange }: MarketplaceViewHeaderProps) {
  return (
-    <Card variant="glass" className="mb-8 p-6 border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan transition-shadow duration-300">
+    <Card variant="glass" className="mb-8 p-6 border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan transition-shadow duration-[var(--duration-normal)]">
      <div className="flex flex-col md:flex-row justify-between items-end gap-4">
        <div>
          <h2 className="text-3xl font-display font-bold text-foreground mb-2 tracking-tight">MARKETPLACE</h2>
--- a/apps/web/src/components/views/marketplace-view/MarketplaceViewSidebar.tsx
+++ b/apps/web/src/components/views/marketplace-view/MarketplaceViewSidebar.tsx
@ -4,7 +4,7 @@ import { Card } from '@/components/ui/card';
 export function MarketplaceViewSidebar() {
  return (
    <div className="w-64 flex-shrink-0 space-y-8 hidden lg:block animate-slideInLeft">
-      <Card variant="glass" className="border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan transition-shadow duration-300">
+      <Card variant="glass" className="border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan transition-shadow duration-[var(--duration-normal)]">
        <h3 className="text-xs font-bold text-muted-foreground uppercase tracking-widest mb-4">
        Price
        </h3>
--- a/apps/web/src/components/views/settings-view/SettingsViewHeader.tsx
+++ b/apps/web/src/components/views/settings-view/SettingsViewHeader.tsx
@ -3,7 +3,7 @@ import { Card } from '@/components/ui/card';

 export function SettingsViewHeader() {
  return (
-    <Card variant="glass" className="p-6 border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan transition-shadow duration-300">
+    <Card variant="glass" className="p-6 border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan transition-shadow duration-[var(--duration-normal)]">
      <h2 className="text-3xl font-display font-bold text-foreground mb-2">SETTINGS</h2>
      <p className="text-muted-foreground font-mono text-sm">
        Configure your studio, account, and preferences.
--- a/apps/web/src/components/views/social-view/SocialViewFeedItem.tsx
+++ b/apps/web/src/components/views/social-view/SocialViewFeedItem.tsx
@ -19,7 +19,7 @@ export function SocialViewFeedItem({ track, onPlay }: SocialViewFeedItemProps) {
    >
    <Card
      variant="glass"
-      className="p-0 overflow-hidden border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan transition-all duration-300"
+      className="p-0 overflow-hidden border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan transition-all duration-[var(--duration-normal)]"
    >
      <div className="p-4 flex items-center gap-4">
        <div className="w-10 h-10 rounded-full bg-muted overflow-hidden">
--- a/apps/web/src/components/views/social-view/SocialViewSidebar.tsx
+++ b/apps/web/src/components/views/social-view/SocialViewSidebar.tsx
@ -17,7 +17,7 @@ export function SocialViewSidebar({
 }: SocialViewSidebarProps) {
  return (
    <div className="hidden lg:block lg:col-span-3 space-y-8">
-      <Card variant="glass" className="p-0 overflow-hidden border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan transition-shadow duration-300">
+      <Card variant="glass" className="p-0 overflow-hidden border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan transition-shadow duration-[var(--duration-normal)]">
        <div className="h-20 bg-gradient-gaming" />
        <div className="px-4 pb-4">
          <div
--- a/apps/web/src/components/views/social-view/SocialViewTrending.tsx
+++ b/apps/web/src/components/views/social-view/SocialViewTrending.tsx
@ -7,7 +7,7 @@ const TRENDING_TAGS = ['#Techno', '#Synthwave', '#NewGear', '#Tutorial'];
 export function SocialViewTrending() {
  return (
    <div className="hidden lg:block lg:col-span-3 space-y-8">
-      <Card variant="glass" className="border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan transition-shadow duration-300">
+      <Card variant="glass" className="border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan transition-shadow duration-[var(--duration-normal)]">
        <h3 className="font-bold text-sm text-foreground uppercase tracking-wider mb-4 flex items-center gap-2">
          <Hash className="w-4 h-4 text-primary" /> Trending Tags
        </h3>
@ -15,7 +15,7 @@ export function SocialViewTrending() {
          {TRENDING_TAGS.map((t) => (
            <span
              key={t}
-              className="text-xs bg-muted px-2 py-1 rounded text-muted-foreground cursor-pointer hover:text-foreground hover:bg-muted/80 transition-all duration-200"
+              className="text-xs bg-muted px-2 py-1 rounded text-muted-foreground cursor-pointer hover:text-foreground hover:bg-muted/80 transition-all duration-[var(--duration-fast)]"
            >
              {t}
            </span>
--- a/apps/web/src/features/auth/components/AuthButton.tsx
+++ b/apps/web/src/features/auth/components/AuthButton.tsx
@ -20,7 +20,7 @@ export function AuthButton({
      className={cn(
        'w-full px-4 py-2.5 rounded-xl font-medium transition-all duration-[var(--duration-immersive)] ease-in-out focus:outline-none focus:ring-2 focus:ring-primary/20 focus:ring-offset-2 focus:ring-offset-background',
        variant === 'primary'
-          ? 'bg-primary text-primary-foreground hover:opacity-90 shadow-[0_0_20px_var(--color-primary)/0.25]'
+          ? 'bg-primary text-primary-foreground hover:opacity-90 shadow-button-primary-glow'
          : 'bg-muted text-foreground hover:bg-muted/80 border border-border',
        (disabled || loading) && 'opacity-50 cursor-not-allowed',
        className,
--- a/apps/web/src/features/auth/components/AuthLayout.tsx
+++ b/apps/web/src/features/auth/components/AuthLayout.tsx
@ -39,7 +39,7 @@ export function AuthLayout({
        <header className="text-center">
          <div className="flex items-center justify-center mb-6">
            <div
-              className="h-12 w-12 rounded-xl bg-primary flex items-center justify-center shadow-[0_0_20px_var(--color-primary)/0.4]"
+              className="h-12 w-12 rounded-xl bg-primary flex items-center justify-center shadow-button-primary-glow"
              aria-hidden="true"
            >
              <span className="text-background font-bold text-2xl">V</span>
--- a/apps/web/src/features/auth/components/LoginForm.tsx
+++ b/apps/web/src/features/auth/components/LoginForm.tsx
@ -111,7 +111,7 @@ export const LoginForm = () => {
        </div>
      )}

-      <div className="space-y-4">
+      <div className="space-y-5">
        <FloatingInput
          label="Email"
          type="email"
@ -147,7 +147,7 @@ export const LoginForm = () => {
        disabled={isLoading}
        variant="default"
        size="lg"
-        className="w-full bg-gradient-to-r from-primary to-primary/80 hover:from-primary/90 hover:to-primary/70 text-primary-foreground font-bold tracking-wide shadow-lg shadow-primary/20 rounded-xl"
+        className="mt-5 w-full bg-gradient-to-r from-primary to-primary/80 hover:from-primary/90 hover:to-primary/70 text-primary-foreground font-bold tracking-wide shadow-lg shadow-primary/20 rounded-xl transition-all duration-[var(--duration-normal)]"
      >
        {isLoading ? (
          <span className="flex items-center gap-2">
--- a/apps/web/src/features/auth/components/RegisterForm.tsx
+++ b/apps/web/src/features/auth/components/RegisterForm.tsx
@ -143,7 +143,7 @@ export const RegisterForm = () => {
        </div>
      )}

-      <div className="space-y-4">
+      <div className="space-y-5">
        <FloatingInput
          label="Email"
          type="email"
@ -182,7 +182,7 @@ export const RegisterForm = () => {
        disabled={isLoading}
        variant="default"
        size="lg"
-        className="w-full bg-gradient-to-r from-primary to-primary/80 hover:from-primary/90 hover:to-primary/70 text-primary-foreground font-bold tracking-wide shadow-lg shadow-primary/20 rounded-xl"
+        className="mt-5 w-full bg-gradient-to-r from-primary to-primary/80 hover:from-primary/90 hover:to-primary/70 text-primary-foreground font-bold tracking-wide shadow-lg shadow-primary/20 rounded-xl transition-all duration-[var(--duration-normal)]"
      >
        {isLoading ? (
          <span className="flex items-center gap-2">
--- a/apps/web/src/features/chat/components/ChatInput.tsx
+++ b/apps/web/src/features/chat/components/ChatInput.tsx
@ -234,7 +234,7 @@ export const ChatInput: React.FC = () => {
          variant="primary"
          size="icon"
          className={cn(
-            'rounded-xl transition-all duration-300',
+            'rounded-xl transition-all duration-[var(--duration-normal)]',
            message.trim() || attachments.length > 0
              ? 'bg-kodo-cyan text-kodo-void hover:bg-kodo-cyan-dim shadow-neon-cyan'
              : 'bg-white/5 text-kodo-secondary hover:bg-white/10',
--- a/apps/web/src/features/chat/components/ChatMessage.tsx
+++ b/apps/web/src/features/chat/components/ChatMessage.tsx
@ -48,7 +48,7 @@ export const ChatMessageComponent: React.FC<ChatMessageProps> = ({
      <div className="flex items-center gap-2 px-1 mb-0.5">
        <span
          className={cn(
-            'font-mono text-[10px] uppercase tracking-wider',
+            'font-mono text-xs uppercase tracking-wider',
            isMe ? 'text-kodo-steel' : 'text-kodo-magenta',
          )}
        >
@ -56,7 +56,7 @@ export const ChatMessageComponent: React.FC<ChatMessageProps> = ({
          // ...
          {isMe ? 'You' : safeString(message.sender_username || 'Unknown_Signal')}
        </span>
-        <span className="text-[9px] text-kodo-secondary/60">
+        <span className="text-xs text-kodo-secondary/60">
          {new Date(message.created_at).toLocaleTimeString([], {
            hour: '2-digit',
            minute: '2-digit',
@ -80,7 +80,7 @@ export const ChatMessageComponent: React.FC<ChatMessageProps> = ({
          className={cn(
            'px-4 py-2.5 rounded-2xl text-sm backdrop-blur-md shadow-lg transition-all',
            isMe
-              ? 'bg-kodo-cyan/10 border border-kodo-cyan/20 text-white rounded-tr-sm shadow-[0_0_15px_rgba(102,252,241,0.05)]'
+              ? 'bg-kodo-cyan/10 border border-kodo-cyan/20 text-white rounded-tr-sm shadow-card-glow-cyan'
              : 'bg-white/5 border border-white/10 text-kodo-text-main rounded-tl-sm hover:bg-white/10',
          )}
        >
@ -176,9 +176,9 @@ export const ChatMessageComponent: React.FC<ChatMessageProps> = ({
                key={emoji}
                onClick={() => addReaction(message.id, emoji)}
                className={cn(
-                  'flex items-center gap-1 px-1.5 py-0.5 rounded-full text-[10px] border transition-all animate-scaleIn',
+                  'flex items-center gap-1 px-1.5 py-0.5 rounded-full text-xs border transition-all animate-scaleIn',
                  users.includes(user?.id || '')
-                    ? 'bg-kodo-cyan/20 border-kodo-cyan/40 text-kodo-cyan shadow-[0_0_10px_rgba(102,252,241,0.2)]'
+                    ? 'bg-kodo-cyan/20 border-kodo-cyan/40 text-kodo-cyan shadow-queue-item-current'
                    : 'bg-white/5 border-white/10 text-kodo-secondary hover:bg-white/10 hover:border-white/20',
                )}
              >
--- a/apps/web/src/features/chat/components/ChatRoom.tsx
+++ b/apps/web/src/features/chat/components/ChatRoom.tsx
@ -77,7 +77,7 @@ export const ChatRoom: React.FC<ChatRoomProps> = ({ conversationId }) => {
      {/* Search Header Overlay */}
      <div
        className={cn(
-          'absolute top-0 left-0 right-0 z-20 px-4 py-2 transition-all duration-300',
+          'absolute top-0 left-0 right-0 z-20 px-4 py-2 transition-all duration-[var(--duration-normal)]',
          showSearch
            ? 'bg-kodo-void/90 backdrop-blur-md border-b border-white/10'
            : 'bg-transparent pointer-events-none',
@ -142,7 +142,7 @@ export const ChatRoom: React.FC<ChatRoomProps> = ({ conversationId }) => {
              key={msg.id}
              id={`message-${msg.id}`}
              className={cn(
-                'transition-all duration-500 animate-slideUp',
+                'transition-all duration-[var(--duration-slow)] animate-slideUp',
                highlightedMessageId === msg.id &&
                'bg-kodo-steel/10 rounded-xl -mx-4 px-4 py-2 ring-1 ring-kodo-steel/30',
              )}
--- a/apps/web/src/features/chat/components/chat-sidebar/ConversationItem.tsx
+++ b/apps/web/src/features/chat/components/chat-sidebar/ConversationItem.tsx
@ -110,9 +110,9 @@ export function ConversationItem({
          }
        }}
        className={cn(
-          'group relative flex items-center justify-between p-4 rounded-xl cursor-pointer transition-all duration-300 border border-transparent',
+          'group relative flex items-center justify-between p-4 rounded-xl cursor-pointer transition-all duration-[var(--duration-normal)] border border-transparent',
          isSelected
-            ? 'bg-primary/10 border-primary/30 shadow-[0_0_15px_hsl(var(--primary)/0.1)]'
+            ? 'bg-primary/10 border-primary/30 shadow-queue-item-current'
            : 'hover:bg-muted/50 hover:border-muted',
        )}
      >
@ -141,7 +141,7 @@ export function ConversationItem({
              {safeString(conversation.name || `Channel ${conversation.id.substring(0, 4)}`)}
            </span>
            {conversation.type !== 'direct' && (
-              <span className="text-[10px] text-kodo-secondary/50 uppercase tracking-wider">
+              <span className="text-xs text-kodo-secondary/50 uppercase tracking-wider">
                {safeString(conversation.type)}
              </span>
            )}
@ -149,7 +149,7 @@ export function ConversationItem({
        </div>

        {conversation.unread_count != null && Number(conversation.unread_count) > 0 ? (
-          <span className="bg-primary text-primary-foreground text-[10px] px-1.5 py-0.5 rounded-full font-bold shadow-lg shrink-0">
+          <span className="bg-primary text-primary-foreground text-xs px-1.5 py-0.5 rounded-full font-bold shadow-lg shrink-0">
            {conversation.unread_count}
          </span>
        ) : null}
@ -188,7 +188,7 @@ export function ConversationItem({
        </DropdownMenu>

        {isSelected && (
-          <div className="absolute left-0 top-3 bottom-3 w-0.5 bg-primary rounded-r-full shadow-[0_0_8px_hsl(var(--primary)/0.5)]" />
+          <div className="absolute left-0 top-3 bottom-3 w-0.5 bg-primary rounded-r-full shadow-status-dot-cyan" />
        )}
      </div>

--- a/apps/web/src/features/chat/pages/ChatPage.tsx
+++ b/apps/web/src/features/chat/pages/ChatPage.tsx
@ -65,7 +65,7 @@ export const ChatPage: React.FC = () => {
      <div className="relative mb-6">
        <div className="w-16 h-16 border-2 border-primary/20 border-t-primary rounded-full animate-spin" />
        <div className="absolute inset-0 flex items-center justify-center">
-          <div className="w-2 h-2 bg-primary rounded-full animate-pulse shadow-[0_0_10px_var(--color-primary)]" />
+          <div className="w-2 h-2 bg-primary rounded-full animate-pulse shadow-status-dot-cyan" />
        </div>
      </div>
      <p className="font-mono text-sm text-primary animate-pulse tracking-widest">ESTABLISHING UPLINK...</p>
@ -89,7 +89,7 @@ export const ChatPage: React.FC = () => {
      <Card variant="glass" className="w-80 shrink-0 flex flex-col overflow-hidden p-0 border-white/5 bg-black/40 backdrop-blur-2xl">
        <div className="p-4 border-b border-white/5 flex items-center justify-between">
          <h3 className="font-bold text-sm tracking-widest text-muted-foreground uppercase">Channels</h3>
-          <div className={cn("w-2 h-2 rounded-full shadow-[0_0_5px_currentColor]", wsStatus === 'connected' ? 'bg-lime-500 text-lime-500' : 'bg-red-500 text-red-500')} />
+          <div className={cn("w-2 h-2 rounded-full", wsStatus === 'connected' ? 'bg-lime-500 shadow-status-dot-lime' : 'bg-red-500')} />
        </div>
        <ChatSidebar />
      </Card>
--- a/apps/web/src/features/dashboard/pages/DashboardPage.tsx
+++ b/apps/web/src/features/dashboard/pages/DashboardPage.tsx
@ -35,7 +35,7 @@ function DashboardPage() {
      change: '+12%',
      icon: Music,
      color: 'text-cyan-500',
-      shadow: 'drop-shadow-[0_0_8px_rgba(var(--cyan-500),0.5)]',
+      shadow: 'drop-shadow-stat-icon',
    },
    {
      title: 'Messages Sent',
@ -43,7 +43,7 @@ function DashboardPage() {
      change: '+8%',
      icon: MessageSquare,
      color: 'text-lime-500',
-      shadow: 'drop-shadow-[0_0_8px_rgba(var(--lime-500),0.5)]',
+      shadow: 'drop-shadow-stat-icon',
    },
    {
      title: 'Favorites',
@ -51,7 +51,7 @@ function DashboardPage() {
      change: '+23%',
      icon: Heart,
      color: 'text-destructive',
-      shadow: 'drop-shadow-[0_0_8px_rgba(var(--destructive),0.5)]',
+      shadow: 'drop-shadow-stat-icon',
    },
    {
      title: 'Active Friends',
@ -59,7 +59,7 @@ function DashboardPage() {
      change: '+5%',
      icon: Users,
      color: 'text-magenta-500',
-      shadow: 'drop-shadow-[0_0_8px_rgba(var(--magenta-500),0.5)]',
+      shadow: 'drop-shadow-stat-icon',
    },
  ];

@ -78,12 +78,12 @@ function DashboardPage() {
      {/* Stats Cards */}
      <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-4">
        {stats.map((stat) => (
-          <Card key={stat.title} variant="glass" className="group hover:border-primary/50 transition-all duration-300">
+          <Card key={stat.title} variant="glass" className="group hover:border-primary/50 transition-all duration-[var(--duration-normal)]">
            <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
-              <CardTitle className="text-sm font-medium text-muted-foreground group-hover:text-white transition-colors">
+              <CardTitle className="text-sm font-medium text-muted-foreground group-hover:text-white transition-colors duration-[var(--duration-fast)]">
                {stat.title}
              </CardTitle>
-              <stat.icon className={cn("h-4 w-4 transition-all duration-300", stat.color, stat.shadow, "group-hover:scale-110")} />
+              <stat.icon className={cn("h-4 w-4 transition-all duration-[var(--duration-normal)]", stat.color, stat.shadow, "group-hover:scale-110")} />
            </CardHeader>
            <CardContent>
              <div className="text-2xl font-bold text-white tracking-tight">{stat.value}</div>
@ -106,22 +106,22 @@ function DashboardPage() {
          </CardHeader>
          <CardContent>
            <div className="space-y-4">
-              <div className="flex items-center space-x-4 p-3 rounded-lg hover:bg-white/5 transition-colors border border-transparent hover:border-white/5">
-                <div className="w-2 h-2 bg-cyan-500 rounded-full shadow-[0_0_8px_rgba(var(--cyan-500),0.8)] animate-pulse" />
+              <div className="flex items-center space-x-4 p-3 rounded-lg hover:bg-white/5 transition-colors duration-[var(--duration-fast)] border border-transparent hover:border-white/5">
+                <div className="w-2 h-2 bg-cyan-500 rounded-full shadow-status-dot-cyan animate-pulse" />
                <div className="flex-1 space-y-1">
                  <p className="text-sm font-medium text-white">New track added</p>
                  <p className="text-xs text-muted-foreground">2 hours ago</p>
                </div>
              </div>
-              <div className="flex items-center space-x-4 p-3 rounded-lg hover:bg-white/5 transition-colors border border-transparent hover:border-white/5">
-                <div className="w-2 h-2 bg-lime-500 rounded-full shadow-[0_0_8px_rgba(var(--lime-500),0.8)]" />
+              <div className="flex items-center space-x-4 p-3 rounded-lg hover:bg-white/5 transition-colors duration-[var(--duration-fast)] border border-transparent hover:border-white/5">
+                <div className="w-2 h-2 bg-lime-500 rounded-full shadow-status-dot-lime" />
                <div className="flex-1 space-y-1">
                  <p className="text-sm font-medium text-white">Message from @alice</p>
                  <p className="text-xs text-muted-foreground">4 hours ago</p>
                </div>
              </div>
-              <div className="flex items-center space-x-4 p-3 rounded-lg hover:bg-white/5 transition-colors border border-transparent hover:border-white/5">
-                <div className="w-2 h-2 bg-magenta-500 rounded-full shadow-[0_0_8px_rgba(var(--magenta-500),0.8)]" />
+              <div className="flex items-center space-x-4 p-3 rounded-lg hover:bg-white/5 transition-colors duration-[var(--duration-fast)] border border-transparent hover:border-white/5">
+                <div className="w-2 h-2 bg-magenta-500 rounded-full shadow-status-dot-magenta" />
                <div className="flex-1 space-y-1">
                  <p className="text-sm font-medium text-white">New favorite added</p>
                  <p className="text-xs text-muted-foreground">6 hours ago</p>
@ -155,7 +155,7 @@ function DashboardPage() {
            ) : (
              <div className="space-y-4">
                {items.slice(0, 3).map((item) => (
-                  <div key={item.id} className="flex items-center space-x-4 p-2 rounded-lg hover:bg-white/5 transition-colors cursor-pointer group border border-transparent hover:border-white/5">
+                  <div key={item.id} className="flex items-center space-x-4 p-2 rounded-lg hover:bg-white/5 transition-colors duration-[var(--duration-fast)] cursor-pointer group border border-transparent hover:border-white/5">
                    <div className="w-10 h-10 bg-black/40 rounded flex items-center justify-center border border-white/10 group-hover:border-cyan-500/50 transition-colors shadow-lg">
                      <Music className="h-4 w-4 text-muted-foreground group-hover:text-cyan-500 transition-colors" />
                    </div>
@ -201,17 +201,17 @@ function DashboardPage() {
                variant="outline"
                onClick={action.action}
                className={cn(
-                  "h-24 flex-col gap-3 bg-black/20 border-white/10 hover:bg-white/5 transition-all duration-300 group",
+                  "h-24 flex-col gap-3 bg-black/20 border-white/10 hover:bg-white/5 transition-all duration-[var(--duration-normal)] group",
                  action.border
                )}
              >
                <div className={cn(
-                  "w-10 h-10 rounded-full bg-white/5 flex items-center justify-center transition-all duration-300 group-hover:scale-110",
+                  "w-10 h-10 rounded-full bg-white/5 flex items-center justify-center transition-all duration-[var(--duration-normal)] group-hover:scale-110",
                  action.color
                )}>
                  <action.icon className="h-5 w-5" />
                </div>
-                <span className="text-muted-foreground group-hover:text-white transition-colors">{action.label}</span>
+                <span className="text-muted-foreground group-hover:text-white transition-colors duration-[var(--duration-fast)]">{action.label}</span>
              </Button>
            ))}
          </div>
--- a/apps/web/src/features/error/pages/NotFoundPage.tsx
+++ b/apps/web/src/features/error/pages/NotFoundPage.tsx
@ -22,19 +22,19 @@ function NotFoundPage() {

  return (
    <div className="min-h-screen flex items-center justify-center bg-background p-4">
-      <div className="w-full max-w-2xl">
-        <Card className="text-center">
+      <div className="w-full max-w-2xl animate-fadeIn">
+        <Card className="text-center transition-shadow duration-[var(--duration-normal)]">
          <CardHeader>
-            <div className="mx-auto mb-4 flex h-16 w-16 items-center justify-center rounded-full bg-muted">
-              <Search className="h-8 w-8 text-kodo-steel dark:text-kodo-steel" />
+            <div className="mx-auto mb-4 flex h-16 w-16 items-center justify-center rounded-full bg-muted transition-colors duration-[var(--duration-fast)]">
+              <Search className="h-8 w-8 text-muted-foreground" />
            </div>
-            <CardTitle className="text-2xl">Page non trouvée</CardTitle>
+            <CardTitle className="text-2xl font-display font-bold tracking-tight">Page non trouvée</CardTitle>
            <CardDescription>
              La page que vous recherchez n'existe pas ou a été déplacée.
            </CardDescription>
          </CardHeader>
          <CardContent className="space-y-6">
-            <div className="text-6xl font-bold text-foreground">
+            <div className="text-6xl font-display font-bold text-foreground tracking-tight">
              404
            </div>
            <p className="text-muted-foreground">
--- a/apps/web/src/features/library/pages/library-page/LibraryPageEmpty.tsx
+++ b/apps/web/src/features/library/pages/library-page/LibraryPageEmpty.tsx
@ -7,8 +7,8 @@ interface LibraryPageEmptyProps {

 export function LibraryPageEmpty({ onUploadClick }: LibraryPageEmptyProps) {
  return (
-    <div className="flex-1 flex flex-col items-center justify-center text-center opacity-60 min-h-layout-page-sm">
-      <div className="w-24 h-24 bg-muted/10 rounded-full flex items-center justify-center mb-6 border border-border">
+    <div className="flex-1 flex flex-col items-center justify-center text-center min-h-layout-page-sm animate-fadeIn">
+      <div className="w-24 h-24 bg-muted/10 rounded-full flex items-center justify-center mb-6 border border-border transition-colors duration-[var(--duration-normal)] hover:border-primary/20 hover:bg-muted/20">
        <FileAudio className="w-10 h-10 text-muted-foreground" />
      </div>
      <h3 className="text-xl font-display font-bold text-foreground mb-2">It&apos;s empty here</h3>
@ -18,7 +18,7 @@ export function LibraryPageEmpty({ onUploadClick }: LibraryPageEmptyProps) {
      <Button
        variant="outline"
        onClick={onUploadClick}
-        className="border-primary/50 text-primary hover:bg-primary/10"
+        className="border-primary/50 text-primary hover:bg-primary/10 transition-colors duration-[var(--duration-fast)]"
      >
        Upload File
      </Button>
--- a/apps/web/src/features/library/pages/library-page/LibraryPageGrid.tsx
+++ b/apps/web/src/features/library/pages/library-page/LibraryPageGrid.tsx
@ -34,19 +34,22 @@ export function LibraryPageGrid({
          <motion.div key={track.id} variants={itemVariants}>
          <Card
            variant="glass"
+            tabIndex={0}
+            role="button"
            className={cn(
-              'group relative aspect-[4/5] overflow-hidden cursor-pointer hover:-translate-y-2 transition-all duration-300 border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan',
+              'group relative aspect-[4/5] overflow-hidden cursor-pointer hover:-translate-y-2 transition-all duration-[var(--duration-normal)] border-white/5 bg-black/20 backdrop-blur-xl hover-glow-cyan focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-primary/50 focus-visible:ring-offset-2 focus-visible:ring-offset-background',
              isSelected
-                ? 'border-primary ring-1 ring-primary shadow-[0_0_20px_rgba(var(--cyan-500),0.2)]'
+                ? 'border-primary ring-1 ring-primary shadow-card-glow-cyan'
                : 'hover:border-primary/30'
            )}
            onClick={() => onToggleSelection(track.id)}
+            onKeyDown={(e) => { if (e.key === 'Enter' || e.key === ' ') { e.preventDefault(); onToggleSelection(track.id); } }}
          >
-            <div className="absolute top-3 left-3 z-10 opacity-0 group-hover:opacity-100 transition-opacity">
+            <div className="absolute top-3 left-3 z-10 opacity-0 group-hover:opacity-100 transition-opacity duration-[var(--duration-fast)]">
              {isSelected ? (
-                <CheckCircle2 className="w-6 h-6 text-primary fill-background drop-shadow-[0_0_5px_rgba(0,0,0,0.5)]" />
+                <CheckCircle2 className="w-6 h-6 text-primary fill-background drop-shadow-md" />
              ) : (
-                <Circle className="w-6 h-6 text-white/70 hover:text-white drop-shadow-[0_0_5px_rgba(0,0,0,0.5)]" />
+                <Circle className="w-6 h-6 text-white/70 hover:text-white drop-shadow-md" />
              )}
            </div>
            <div className="h-3/5 w-full bg-gradient-to-br from-background to-black/40 flex items-center justify-center relative group-hover:from-background/80 group-hover:to-black/60 transition-all">
@ -54,10 +57,10 @@ export function LibraryPageGrid({
                <img
                  src={track.coverUrl}
                  alt={track.title}
-                  className="w-full h-full object-cover transition-transform duration-700 group-hover:scale-110"
+                  className="w-full h-full object-cover transition-transform duration-[var(--duration-slower)] group-hover:scale-110"
                />
              ) : (
-                <FileAudio className="w-12 h-12 text-muted-foreground/30 group-hover:text-primary/50 transition-colors duration-300" />
+                <FileAudio className="w-12 h-12 text-muted-foreground/30 group-hover:text-primary/50 transition-colors duration-[var(--duration-normal)]" />
              )}
              <button
                type="button"
@ -65,9 +68,9 @@ export function LibraryPageGrid({
                  e.stopPropagation();
                  onPlayTrack(track);
                }}
-                className="absolute inset-0 flex items-center justify-center opacity-0 group-hover:opacity-100 transition-all scale-90 group-hover:scale-100"
+                className="absolute inset-0 flex items-center justify-center opacity-0 group-hover:opacity-100 transition-all duration-[var(--duration-normal)] scale-90 group-hover:scale-100 focus:opacity-100 focus:scale-100 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-primary/50 focus-visible:ring-inset"
              >
-                <div className="w-14 h-14 rounded-full bg-primary text-primary-foreground flex items-center justify-center shadow-[0_0_30px_rgba(var(--cyan-500),0.6)] hover:scale-110 transition-transform">
+                <div className="w-14 h-14 rounded-full bg-primary text-primary-foreground flex items-center justify-center shadow-button-primary-glow hover:scale-110 transition-transform duration-[var(--duration-fast)]">
                  <Play className="w-6 h-6 ml-1 fill-current" />
                </div>
              </button>
@ -75,7 +78,7 @@ export function LibraryPageGrid({
            <div className="p-4 flex flex-col justify-between h-2/5 bg-black/20 backdrop-blur-sm">
              <div>
                <h3
-                  className="font-bold text-sm text-foreground truncate mb-1 group-hover:text-primary transition-colors"
+                  className="font-bold text-sm text-foreground truncate mb-1 group-hover:text-primary transition-colors duration-[var(--duration-fast)]"
                  title={track.title}
                >
                  {track.title}
--- a/apps/web/src/features/library/pages/library-page/LibraryPageList.tsx
+++ b/apps/web/src/features/library/pages/library-page/LibraryPageList.tsx
@ -31,14 +31,14 @@ export function LibraryPageList({ tracks, onPlayTrack }: LibraryPageListProps) {
          {tracks.map((track, i) => (
            <tr
              key={track.id}
-              className="group hover:bg-white/5 transition-colors cursor-pointer"
+              className="group hover:bg-white/5 transition-colors duration-[var(--duration-fast)] cursor-pointer"
              onClick={() => onPlayTrack(track)}
            >
              <td className="px-6 py-4 text-center text-muted-foreground group-hover:text-primary">
                <span className="group-hover:hidden">{i + 1}</span>
                <Play className="w-4 h-4 hidden group-hover:inline-block fill-current" />
              </td>
-              <td className="px-6 py-4 font-medium text-foreground group-hover:text-primary transition-colors">
+              <td className="px-6 py-4 font-medium text-foreground group-hover:text-primary transition-colors duration-[var(--duration-fast)]">
                {track.title}
              </td>
              <td className="px-6 py-4 text-muted-foreground hidden md:table-cell">
@ -55,7 +55,7 @@ export function LibraryPageList({ tracks, onPlayTrack }: LibraryPageListProps) {
                  <DropdownMenuTrigger asChild>
                    <button
                      type="button"
-                      className="p-2 hover:bg-white/10 rounded-full transition-colors opacity-0 group-hover:opacity-100 text-muted-foreground"
+                      className="p-2 hover:bg-white/10 rounded-full transition-colors duration-[var(--duration-fast)] opacity-0 group-hover:opacity-100 text-muted-foreground"
                      onClick={(e) => e.stopPropagation()}
                    >
                      <MoreVertical className="w-4 h-4" />
--- a/apps/web/src/features/library/pages/library-page/LibraryPageToolbar.tsx
+++ b/apps/web/src/features/library/pages/library-page/LibraryPageToolbar.tsx
@ -60,7 +60,7 @@ export function LibraryPageToolbar({
        </div>
        <Button
          onClick={onNewClick}
-          className="shadow-[0_0_20px_rgba(var(--cyan-500),0.3)] hover:shadow-[0_0_30px_rgba(var(--cyan-500),0.5)] transition-all bg-primary text-primary-foreground"
+          className="shadow-button-primary-glow hover:shadow-button-primary-glow-hover transition-all bg-primary text-primary-foreground"
        >
          <Plus className="w-4 h-4 mr-2" /> New
        </Button>
--- a/Show more
+++ b/Show more