diff --git a/client/src/components/layout/app-shell.tsx b/client/src/components/layout/app-shell.tsx
index 599f2d8..7358747 100644
--- a/client/src/components/layout/app-shell.tsx
+++ b/client/src/components/layout/app-shell.tsx
@@ -1,7 +1,7 @@
 import type { ReactNode } from "react";
 import { Link, useLocation } from "wouter";
 import Sidebar from "@/components/sidebar";
-import { LogoMark } from "@/components/brand/logo";
+import { Logo } from "@/components/brand/logo";
 import { MobileNav } from "@/components/layout/mobile-nav";
 import { titleForPath } from "@/components/layout/nav-config";
 import { cn } from "@/lib/utils";
@@ -15,10 +15,10 @@ export function AppShell({ children }: { children: ReactNode }) {
       <Sidebar />
       <div className="flex min-w-0 flex-1 flex-col">
         <header className="sticky top-0 z-30 flex h-14 items-center gap-3 border-b bg-card/90 px-4 backdrop-blur-lg lg:hidden">
-          <Link href="/" aria-label="Accueil">
-            <LogoMark size={30} />
+          <Link href="/" aria-label="Accueil Social Flow">
+            <Logo size={30} subtitle={false} />
           </Link>
-          <p className="truncate font-semibold">{titleForPath(location)}</p>
+          <span className="sr-only">{titleForPath(location)}</span>
         </header>
         <main className="flex-1 pb-24 lg:pb-0">{children}</main>
       </div>
diff --git a/client/src/components/sidebar.tsx b/client/src/components/sidebar.tsx
index 038c5e1..a46d104 100644
--- a/client/src/components/sidebar.tsx
+++ b/client/src/components/sidebar.tsx
@@ -33,7 +33,7 @@ function NavLink({ item, active, collapsed }: { item: NavItem; active: boolean;
       href={item.href}
       aria-current={active ? "page" : undefined}
       className={cn(
-        "group relative flex items-center gap-3 rounded-lg px-3 py-2 text-sm font-medium transition-colors",
+        "group relative flex items-center gap-3 rounded-lg px-3 py-[7px] text-sm font-medium transition-colors",
         active
           ? "bg-primary/10 text-primary"
           : "text-muted-foreground hover:bg-sidebar-accent hover:text-foreground",
@@ -98,7 +98,7 @@ export default function Sidebar() {
 
       <nav className={cn("flex-1 overflow-y-auto py-4 scrollbar-none", collapsed ? "px-3" : "px-4")} aria-label="Navigation principale">
         {groups.map((group, gi) => (
-          <div key={group.label ?? gi} className={cn(gi > 0 && "mt-5")}>
+          <div key={group.label ?? gi} className={cn(gi > 0 && "mt-4")}>
             {group.label &&
               (collapsed ? (
                 <div className="mx-auto mb-2 h-px w-6 bg-sidebar-border" />
@@ -140,7 +140,7 @@ export default function Sidebar() {
                 )}
               </button>
             </DropdownMenuTrigger>
-            <DropdownMenuContent side={collapsed ? "right" : "top"} align="start" className="w-60">
+            <DropdownMenuContent side={collapsed ? "right" : "top"} align="start" className="w-64">
               <DropdownMenuLabel className="font-normal">
                 <p className="text-sm font-medium">{session.username}</p>
                 <p className="text-xs text-muted-foreground">{isAdmin ? "Administrateur" : "Utilisateur"}</p>
diff --git a/client/src/components/theme-provider.tsx b/client/src/components/theme-provider.tsx
index daba5ff..fdb2384 100644
--- a/client/src/components/theme-provider.tsx
+++ b/client/src/components/theme-provider.tsx
@@ -37,7 +37,7 @@ export function ThemeToggle({ className, compact = false }: { className?: string
           title={label}
           onClick={() => setTheme(value)}
           className={cn(
-            "flex flex-1 items-center justify-center gap-1.5 rounded-md px-2 py-1.5 text-xs font-medium text-muted-foreground transition-colors",
+            "flex min-w-0 flex-1 items-center justify-center gap-1.5 rounded-md px-1.5 py-1.5 text-xs font-medium text-muted-foreground transition-colors",
             current === value ? "bg-card text-foreground shadow-sm" : "hover:text-foreground",
           )}
           data-testid={`theme-${value}`}
diff --git a/client/src/pages/audio-admin.tsx b/client/src/pages/audio-admin.tsx
index 0d13d7c..6d86db4 100644
--- a/client/src/pages/audio-admin.tsx
+++ b/client/src/pages/audio-admin.tsx
@@ -68,7 +68,7 @@ export default function AudioAdmin() {
             const successCount = data.results?.filter((r: any) => r.success).length ?? 0;
             const failCount = data.results?.filter((r: any) => !r.success).length ?? 0;
             toast({
-                title: "Upload terminé",
+                title: "Import terminé",
                 description: failCount > 0
                     ? `${successCount} fichier(s) ajouté(s), ${failCount} échec(s)`
                     : `${successCount} fichier(s) ajouté(s) à la bibliothèque`,
diff --git a/client/src/pages/new-post.tsx b/client/src/pages/new-post.tsx
index 7f0da06..906a6a5 100644
--- a/client/src/pages/new-post.tsx
+++ b/client/src/pages/new-post.tsx
@@ -783,7 +783,7 @@ export default function NewPost() {
                         >
                           <div className="flex items-center justify-between">
                             <Icon className={`h-5 w-5 ${postType === value ? 'text-primary' : 'text-muted-foreground'}`} />
-                            <RadioGroupItem value={value} id={`format-${value}`} className="sr-only sm:not-sr-only" />
+                            <RadioGroupItem value={value} id={`format-${value}`} className="hidden sm:block" />
                           </div>
                           <div>
                             <p className="text-sm font-medium">{label}</p>
diff --git a/client/src/pages/settings.tsx b/client/src/pages/settings.tsx
index b9f357b..9622691 100644
--- a/client/src/pages/settings.tsx
+++ b/client/src/pages/settings.tsx
@@ -278,7 +278,7 @@ export default function Settings() {
     onSuccess: () => {
       queryClient.invalidateQueries({ queryKey: ['/api/cloudinary/config'] });
       toast({
-        title: "Logo uploadé",
+        title: "Logo enregistré",
         description: "Votre logo a été enregistré avec succès",
       });
       setLogoFile(null);
@@ -286,7 +286,7 @@ export default function Settings() {
     onError: (error: Error) => {
       toast({
         title: "Erreur",
-        description: error.message || "Impossible d'uploader le logo",
+        description: error.message || "Impossible d'importer le logo",
         variant: "destructive",
       });
     },
@@ -512,7 +512,7 @@ export default function Settings() {
                     Logo de l'entreprise
                   </CardTitle>
                   <CardDescription>
-                    Uploadez votre logo pour l'ajouter aux images éditées
+                    Importez votre logo pour l'ajouter aux images éditées
                   </CardDescription>
                 </CardHeader>
                 <CardContent className="space-y-4">
@@ -545,7 +545,7 @@ export default function Settings() {
                             onClick={() => document.getElementById('logo-upload-replace')?.click()}
                           >
                             <Upload className="w-4 h-4" />
-                            {uploadLogoMutation.isPending ? "Upload en cours..." : "Remplacer le logo"}
+                            {uploadLogoMutation.isPending ? "Import en cours…" : "Remplacer le logo"}
                           </Button>
                         </Label>
                         <input
@@ -567,7 +567,7 @@ export default function Settings() {
                       <div className="border-2 border-dashed border-border rounded-lg p-8 text-center">
                         <Upload className="w-12 h-12 mx-auto mb-4 text-muted-foreground" />
                         <p className="text-sm text-muted-foreground mb-4">
-                          Aucun logo uploadé. Choisissez une image PNG ou JPG.
+                          Aucun logo. Choisissez une image PNG ou JPG.
                         </p>
                         <Label htmlFor="logo-upload" className="cursor-pointer">
                           <Button
@@ -577,7 +577,7 @@ export default function Settings() {
                             onClick={() => document.getElementById('logo-upload')?.click()}
                           >
                             <Upload className="w-4 h-4" />
-                            {uploadLogoMutation.isPending ? "Upload en cours..." : "Uploader un logo"}
+                            {uploadLogoMutation.isPending ? "Import en cours…" : "Importer un logo"}
                           </Button>
                         </Label>
                         <input
diff --git a/design_guidelines.md b/design_guidelines.md
index 2b9fdf5..c92a00c 100644
--- a/design_guidelines.md
+++ b/design_guidelines.md
@@ -1,155 +1,43 @@
 # Social Flow - Design Guidelines
 
-## Design Approach
+Interface sobre et lisible, en français, pensée d'abord pour être comprise sans formation.
+Toutes les couleurs passent par les tokens de `client/src/index.css` (modes clair et sombre).
 
-**Selected Framework:** Design System Approach inspired by modern SaaS dashboards (Linear, Buffer, Notion) with Material Design principles for data-rich interfaces.
+## Identité
 
-**Core Philosophy:** Professional productivity tool prioritizing clarity, efficiency, and visual hierarchy in dark mode with sophisticated blue/purple branding.
+- **Logo** : `components/brand/logo.tsx` (`<Logo />`, `<LogoMark />`) — deux ondes qui s'écoulent vers un point, sur un carré arrondi en dégradé indigo → corail. Même dessin dans `client/public/favicon.svg`.
+- **Primaire** : indigo `#4F46E5` (`primary`) — actions, éléments actifs, focus.
+- **Accent** : corail `#F97362` (`brand-accent`) — uniquement dans le dégradé de marque.
+- **Dégradé de marque** (`.gradient-brand`, bouton `variant="brand"`) : réservé au logo et à **une seule** action principale par écran (publier, créer, se connecter).
+- **Statuts** : `success` (publié, actif), `warning` (bientôt expiré), `destructive` (échec, suppression), `info` (en cours).
+- **Plateformes** : `facebook`, `instagram`, `tiktok` — via `components/platform-icon.tsx`.
+- Ne jamais utiliser de couleurs Tailwind brutes (`bg-blue-500`, `#1877F2`…) ni `text-white` sur une surface de l'interface.
 
-## Color Palette
+## Typographie
 
-**Dark Mode (Primary Theme):**
-- Background Base: 222 20% 8%
-- Surface Elevated: 222 18% 12%
-- Surface Card: 222 16% 15%
-- Border Subtle: 222 12% 20%
+- Inter (400–700), JetBrains Mono pour les identifiants et le SQL.
+- Titre de page : `PageHeader` (`text-2xl sm:text-[28px] font-semibold`).
+- Titre de carte : `CardTitle` (`text-base font-semibold`), description en `text-muted-foreground`.
 
-**Brand Colors:**
-- Primary Blue: 215 85% 58%
-- Primary Purple: 265 75% 62%
-- Gradient Accent: Linear gradient from Primary Blue to Primary Purple
+## Mise en page
 
-**Functional Colors:**
-- Success Green: 142 76% 48%
-- Warning Orange: 35 95% 58%
-- Error Red: 0 85% 62%
-- Info Cyan: 195 85% 55%
+- **Shell** : `components/layout/app-shell.tsx` — sidebar groupée sur desktop (≥ lg), en-tête + barre de navigation basse sur mobile (Accueil, Calendrier, **Créer**, Médias, Menu). La navigation est définie une seule fois dans `components/layout/nav-config.ts`.
+- **Contenu** : chaque page commence par `<Page width="narrow|default|wide">` puis `<PageHeader icon title description actions />`.
+  - `narrow` (max-w-3xl) : formulaires simples
+  - `default` (max-w-6xl) : la plupart des pages
+  - `wide` (1400px) : tableau de bord, calendrier, médiathèque
+- Une seule version responsive par écran : pas de pages mobiles séparées.
 
-**Text Hierarchy:**
-- Primary Text: 0 0% 95%
-- Secondary Text: 222 10% 65%
-- Tertiary Text: 222 8% 48%
+## Composants
 
-## Typography
+- **Cartes** : `Card` sans surcharge de style (`rounded-xl border shadow-soft`).
+- **États vides** : `components/empty-state.tsx` avec une action suggérée.
+- **Parcours de création** : `components/stepper.tsx` (`Stepper` + `StepNavigation`), utilisé par Publication et Reel. On explique toujours pourquoi une étape est verrouillée.
+- **Choix exclusifs** : cartes sélectionnables (`RadioGroup` dans un `label` bordé), pas de listes déroulantes quand il y a 2 à 4 options.
+- **Suppressions** : toujours confirmées par `AlertDialog`, jamais `confirm()`.
+- **Badges** : variantes `success`, `warning`, `info`, `danger`, `muted`.
 
-**Font Family:**
-- Primary: 'Inter' from Google Fonts (400, 500, 600, 700)
-- Monospace: 'JetBrains Mono' for timestamps and metrics
+## Rédaction
 
-**Scale:**
-- Headings H1: text-3xl font-semibold
-- Headings H2: text-2xl font-semibold
-- Headings H3: text-xl font-medium
-- Body Large: text-base
-- Body: text-sm
-- Captions: text-xs text-secondary
-
-## Layout System
-
-**Spacing Primitives:** Tailwind units of 2, 4, 6, 8, 12, 16 (e.g., p-4, gap-6, mt-8)
-
-**Grid Structure:**
-- Sidebar: Fixed width 280px (w-70) on desktop, collapsible on mobile
-- Main Content: Flexible with max-w-7xl container
-- Dashboard Grid: grid-cols-1 md:grid-cols-2 lg:grid-cols-3 with gap-6
-
-**Container Widths:**
-- Dashboard sections: max-w-7xl with px-6 to px-8
-- Form containers: max-w-2xl
-- Content cards: Full width within grid columns
-
-## Component Library
-
-### Sidebar Navigation
-- Dark surface (Background Base) with subtle border-right
-- Logo + app name at top (h-16)
-- Navigation items with icons (Heroicons) + labels
-- Active state: Primary gradient background with 12% opacity, blue text
-- Hover: Surface Elevated background
-- Bottom section: User profile card with avatar, name, settings icon
-- Spacing: py-2 between items, px-4 horizontal padding
-
-### Dashboard Cards
-- Background: Surface Card with rounded-xl
-- Border: 1px solid Border Subtle
-- Shadow: Soft shadow (shadow-lg with low opacity)
-- Padding: p-6
-- Header: Flex justify-between with title (text-lg font-semibold) + action button
-- Content spacing: space-y-4 internally
-
-### Post Scheduling Interface
-- Calendar view: Week/month grid with date cells
-- Post cards: Compact cards showing thumbnail + caption preview + platform badges (FB/IG)
-- Drag-and-drop visual indicators
-- Time slots: Hourly breakdown with scheduled posts
-
-### Analytics Cards
-- Metric cards: Large number (text-3xl font-bold) + label + trend indicator
-- Charts: Use Chart.js with gradient fills matching brand colors
-- Grid layout for KPIs: 4 columns on desktop, responsive down
-
-### Forms & Inputs
-- Input fields: Surface Elevated background, border Border Subtle, rounded-lg, px-4 py-3
-- Focus state: Primary Blue border, subtle glow
-- Labels: text-sm font-medium mb-2, Secondary Text color
-- Textarea: min-h-32 for post composition
-- File upload: Dashed border drop zone with center icon and text
-
-### Buttons
-- Primary: Gradient background (blue to purple), text-white, rounded-lg, px-6 py-3, font-medium
-- Secondary: Border Primary Blue, text Primary Blue, transparent background
-- Ghost: Transparent, hover Surface Elevated
-- Icon buttons: w-10 h-10, rounded-lg, center content
-
-### Platform Badges
-- Small pills (px-3 py-1, rounded-full, text-xs font-medium)
-- Facebook: Blue background (215 85% 58% with 15% opacity), blue text
-- Instagram: Purple background (265 75% 62% with 15% opacity), purple text
-
-### Status Indicators
-- Dots with colors: w-2 h-2 rounded-full
-- Scheduled: Primary Blue
-- Published: Success Green
-- Failed: Error Red
-- Draft: Tertiary Text
-
-### Data Tables
-- Header row: Surface Elevated background, font-medium, uppercase text-xs
-- Rows: Border-bottom subtle, hover Surface Card
-- Padding: px-6 py-4
-- Alternating backgrounds for better readability
-
-## Animations
-
-**Minimal & Purposeful:**
-- Page transitions: Fade-in only (150ms)
-- Card hover: Subtle lift (translateY -2px, 200ms)
-- Button interactions: Scale 0.98 on active
-- Navigation: Smooth color transitions (200ms)
-- No distracting scroll animations or complex effects
-
-## Images
-
-**Hero Section:** None - Dashboard-first interface prioritizing immediate utility
-
-**Avatar & Thumbnails:**
-- User avatars: w-10 h-10, rounded-full with border
-- Post thumbnails: aspect-video, rounded-lg, object-cover
-- Platform logos: Use official brand SVGs at 20x20 or 24x24
-
-**Empty States:**
-- Illustration placeholders for "No posts scheduled", "No analytics data"
-- Center aligned with icon, heading, and CTA button
-- Subtle grayscale illustrations maintaining professional tone
-
-## Key Screens Layout
-
-**Dashboard:** 3-column grid with Overview metrics (top row), Recent Posts card, Upcoming Schedule card, Quick Analytics
-
-**Calendrier:** Full-width calendar component, left sidebar filter (platforms, status), right panel for selected post details
-
-**Nouvelle Publication:** Center form (max-w-2xl), left preview panel showing platform-specific mockups, sticky publish/schedule buttons
-
-**Analytiques:** Metric cards grid (4 cols), followed by full-width charts for engagement over time, best posting times heatmap
-
-**Paramètres:** Two-column layout, left navigation tabs, right content panels
\ No newline at end of file
+- Verbes d'action clairs : « Importer », « Programmer », « Connecter un compte ».
+- Pas d'anglicismes (« Uploader », « Token ») ni de jargon technique visible par défaut : les détails vont dans un bloc « Besoin d'aide ? » repliable.