/* =============================================
   AidAnnot Design System — v2.0
   Thème double (clair/sombre), sidebar, chat UI
   ============================================= */

/* === GOOGLE FONTS === */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* =============================================
   VARIABLES — THÈME CLAIR (défaut)
   ============================================= */
:root {
    /* Couleurs accent */
    --accent: #2563EB;
    --accent-hover: #1D4ED8;
    --accent-light: rgba(37, 99, 235, 0.1);
    --accent-lighter: rgba(37, 99, 235, 0.06);

    /* Fond général */
    --bg-app: #F7F8FA;
    --bg-surface: #FFFFFF;
    --bg-surface-2: #F0F2F5;
    --bg-surface-3: #E8EBF0;
    --bg-hover: rgba(37, 99, 235, 0.06);

    /* Sidebar */
    --sidebar-bg: #FFFFFF;
    --sidebar-border: #E5E7EB;
    --sidebar-item-hover: #F3F4F6;
    --sidebar-item-active: rgba(37, 99, 235, 0.1);
    --sidebar-item-active-text: #2563EB;
    --sidebar-width: 260px;

    /* Texte */
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --text-muted: #9CA3AF;
    --text-on-accent: #FFFFFF;

    /* Bordures */
    --border: #E5E7EB;
    --border-strong: #D1D5DB;
    --border-focus: #2563EB;

    /* Ombres */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);

    /* Chat bubbles */
    --bubble-user-bg: #2563EB;
    --bubble-user-text: #FFFFFF;
    --bubble-ai-bg: #FFFFFF;
    --bubble-ai-text: #111827;
    --bubble-ai-border: #E5E7EB;

    /* Inputs */
    --input-bg: #FFFFFF;
    --input-border: #D1D5DB;
    --input-text: #111827;
    --input-placeholder: #9CA3AF;

    /* Statuts */
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    --info: #3B82F6;

    /* Transitions */
    --transition: 0.2s ease;
    --transition-slow: 0.3s ease;

    /* Radius */
    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* Topbar mobile */
    --topnav-height: 56px;
}

/* =============================================
   VARIABLES — THÈME SOMBRE
   ============================================= */
[data-theme="dark"] {
    --accent: #3B82F6;
    --accent-hover: #2563EB;
    --accent-light: rgba(59, 130, 246, 0.15);
    --accent-lighter: rgba(59, 130, 246, 0.08);

    --bg-app: #171717;
    --bg-surface: #212121;
    --bg-surface-2: #2D2D2D;
    --bg-surface-3: #383838;
    --bg-hover: rgba(59, 130, 246, 0.1);

    --sidebar-bg: #1E1E1E;
    --sidebar-border: #2D2D2D;
    --sidebar-item-hover: #2A2A2A;
    --sidebar-item-active: rgba(59, 130, 246, 0.15);
    --sidebar-item-active-text: #60A5FA;

    --text-primary: #F9FAFB;
    --text-secondary: #9CA3AF;
    --text-muted: #6B7280;
    --text-on-accent: #FFFFFF;

    --border: #2D2D2D;
    --border-strong: #404040;
    --border-focus: #3B82F6;

    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.35), 0 2px 4px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.4), 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.4), 0 10px 10px rgba(0, 0, 0, 0.2);

    --bubble-user-bg: #2563EB;
    --bubble-user-text: #FFFFFF;
    --bubble-ai-bg: #2D2D2D;
    --bubble-ai-text: #F9FAFB;
    --bubble-ai-border: #383838;

    --input-bg: #2D2D2D;
    --input-border: #404040;
    --input-text: #F9FAFB;
    --input-placeholder: #6B7280;
}

/* =============================================
   RESET & BASE
   ============================================= */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    height: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-app);
    min-height: 100vh;
    transition: background-color var(--transition-slow), color var(--transition-slow);
    -webkit-font-smoothing: antialiased;
}

/* =============================================
   LAYOUT PRINCIPAL
   ============================================= */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.app-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
}

.app-content {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

/* =============================================
   SIDEBAR — DESKTOP
   ============================================= */
.app-sidebar {
    width: var(--sidebar-width);
    flex-shrink: 0;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: sticky;
    top: 0;
    overflow: hidden;
    transition: background var(--transition-slow), border-color var(--transition-slow);
    z-index: 100;
}

.sidebar-header {
    padding: 1.25rem 1rem 1rem;
    border-bottom: 1px solid var(--sidebar-border);
    flex-shrink: 0;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    text-decoration: none;
    margin-bottom: 1rem;
}

.sidebar-logo img {
    height: 36px;
    width: auto;
}

.sidebar-logo-text {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.btn-new-session {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.6rem 1rem;
    background: var(--accent);
    color: var(--text-on-accent);
    border: none;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.btn-new-session:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
    color: #fff;
    text-decoration: none;
}

/* Sessions récentes */
.sidebar-sessions {
    flex: 1;
    overflow-y: auto;
    padding: 0.75rem 0.5rem;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

.sidebar-sessions::-webkit-scrollbar {
    width: 4px;
}

.sidebar-sessions::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-sessions::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: var(--radius-full);
}

.sidebar-section-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    padding: 0.5rem 0.75rem 0.25rem;
    user-select: none;
}

.sidebar-session-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
    cursor: pointer;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.825rem;
    transition: background var(--transition), color var(--transition);
    position: relative;
    group: true;
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-session-item:hover {
    background: var(--sidebar-item-hover);
    color: var(--text-primary);
    text-decoration: none;
}

.sidebar-session-item.active {
    background: var(--sidebar-item-active);
    color: var(--sidebar-item-active-text);
    font-weight: 500;
}

.sidebar-session-item i {
    font-size: 0.75rem;
    flex-shrink: 0;
    color: var(--text-muted);
}

.sidebar-session-item .session-title {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sidebar-session-item .session-delete {
    opacity: 0;
    transition: opacity var(--transition);
    color: var(--text-muted);
    padding: 2px 4px;
    border-radius: var(--radius-sm);
    border: none;
    background: none;
    cursor: pointer;
    flex-shrink: 0;
}

.sidebar-session-item:hover .session-delete {
    opacity: 1;
}

.sidebar-session-item .session-delete:hover {
    color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
}

/* Navigation sidebar */
.sidebar-nav {
    padding: 0.5rem;
    border-top: 1px solid var(--sidebar-border);
    flex-shrink: 0;
}

.sidebar-nav-item {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: background var(--transition), color var(--transition);
    margin-bottom: 2px;
}

.sidebar-nav-item:hover {
    background: var(--sidebar-item-hover);
    color: var(--text-primary);
    text-decoration: none;
}

.sidebar-nav-item.active {
    background: var(--sidebar-item-active);
    color: var(--sidebar-item-active-text);
}

.sidebar-nav-item i {
    width: 18px;
    text-align: center;
    font-size: 0.875rem;
    flex-shrink: 0;
}

/* Pied de sidebar */
.sidebar-footer {
    padding: 0.75rem 0.5rem;
    border-top: 1px solid var(--sidebar-border);
    flex-shrink: 0;
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.5rem 0.625rem;
    border-radius: var(--radius);
    cursor: pointer;
    position: relative;
}

.sidebar-user:hover {
    background: var(--sidebar-item-hover);
}

.sidebar-user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--accent);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
}

.sidebar-user-info {
    flex: 1;
    min-width: 0;
}

.sidebar-user-name {
    font-size: 0.825rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-user-role {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.sidebar-controls {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0 0.25rem 0.5rem;
}

.sidebar-control-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--radius);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background var(--transition), color var(--transition);
    text-decoration: none;
    font-size: 0.85rem;
}

.sidebar-control-btn:hover {
    background: var(--sidebar-item-hover);
    color: var(--text-primary);
}

.sidebar-lang-select {
    flex: 1;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.75rem;
    padding: 4px 6px;
    cursor: pointer;
}

/* =============================================
   TOP NAVBAR — MOBILE UNIQUEMENT
   ============================================= */
.top-navbar {
    height: var(--topnav-height);
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 1rem;
    gap: 0.75rem;
    flex-shrink: 0;
    z-index: 50;
    box-shadow: var(--shadow-xs);
}

.top-navbar-logo {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.top-navbar-logo img {
    height: 28px;
    width: auto;
}

.top-nav-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background var(--transition);
    font-size: 1rem;
}

.top-nav-btn:hover {
    background: var(--bg-surface-2);
    color: var(--text-primary);
}

/* =============================================
   OFFCANVAS SIDEBAR MOBILE
   ============================================= */
.offcanvas.offcanvas-start {
    width: var(--sidebar-width) !important;
    background: var(--sidebar-bg) !important;
    border-right: 1px solid var(--sidebar-border) !important;
}

.offcanvas-body {
    padding: 0 !important;
}

/* =============================================
   CHAT INTERFACE
   ============================================= */
.chat-page {
    display: flex;
    flex-direction: column;
    height: calc(100vh - var(--topnav-height, 0px));
    max-height: calc(100vh - var(--topnav-height, 0px));
    overflow: hidden;
}

@media (min-width: 992px) {
    .chat-page {
        height: 100vh;
        max-height: 100vh;
    }
}

.chat-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1.25rem;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    box-shadow: var(--shadow-xs);
}

.chat-session-title {
    flex: 1;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    border: none;
    background: transparent;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    cursor: text;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-session-title:focus {
    background: var(--bg-surface-2);
    outline: 1px solid var(--border-focus);
    white-space: normal;
}

.chat-options {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.chat-option-select {
    font-size: 0.78rem;
    padding: 5px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--input-bg);
    color: var(--text-primary);
    cursor: pointer;
    transition: border-color var(--transition);
}

.chat-option-select:focus {
    border-color: var(--border-focus);
    outline: none;
}

/* Messages container */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

@media (min-width: 768px) {
    .chat-messages {
        padding: 2rem 2rem;
    }
}

@media (min-width: 1200px) {
    .chat-messages {
        padding: 2rem 15%;
    }
}

.chat-messages::-webkit-scrollbar {
    width: 4px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: var(--radius-full);
}

/* Welcome state */
.chat-welcome {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    text-align: center;
    padding: 2rem 1rem;
    color: var(--text-secondary);
    gap: 1rem;
}

.chat-welcome-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--accent-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: var(--accent);
}

.chat-welcome h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.chat-welcome p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    max-width: 320px;
    margin: 0;
    line-height: 1.6;
}

/* Message rows */
.chat-message-row {
    display: flex;
    gap: 0.75rem;
    animation: message-in 0.3s ease-out;
}

@keyframes message-in {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.chat-message-row.user {
    flex-direction: row-reverse;
}

.chat-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 700;
    margin-top: 2px;
}

.chat-avatar.ai {
    background: linear-gradient(135deg, var(--accent), #7C3AED);
    color: white;
}

.chat-avatar.user {
    background: var(--bg-surface-3);
    color: var(--text-secondary);
}

.chat-bubble-wrapper {
    display: flex;
    flex-direction: column;
    max-width: 80%;
    gap: 0.375rem;
}

@media (min-width: 768px) {
    .chat-bubble-wrapper {
        max-width: 65%;
    }
}

.chat-message-row.user .chat-bubble-wrapper {
    align-items: flex-end;
}

/* Bulles */
.chat-bubble {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-word;
}

.chat-bubble.user {
    background: var(--bubble-user-bg);
    color: var(--bubble-user-text);
    border-bottom-right-radius: var(--radius-sm);
}

.chat-bubble.ai {
    background: var(--bubble-ai-bg);
    color: var(--bubble-ai-text);
    border: 1px solid var(--bubble-ai-border);
    border-bottom-left-radius: var(--radius-sm);
    box-shadow: var(--shadow-xs);
}

.chat-bubble-meta {
    font-size: 0.7rem;
    color: var(--text-muted);
    padding: 0 4px;
}

/* Actions sur bulles IA */
.chat-bubble-actions {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0 4px;
    flex-wrap: wrap;
}

.chat-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--bg-surface);
    color: var(--text-secondary);
    font-size: 0.72rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.chat-action-btn:hover {
    background: var(--bg-surface-2);
    color: var(--text-primary);
    border-color: var(--border-strong);
}

.chat-action-btn.thumbs-up:hover,
.chat-action-btn.thumbs-up.active {
    color: var(--success);
    border-color: var(--success);
    background: rgba(16, 185, 129, 0.08);
}

.chat-action-btn.thumbs-down:hover,
.chat-action-btn.thumbs-down.active {
    color: var(--danger);
    border-color: var(--danger);
    background: rgba(239, 68, 68, 0.08);
}

/* Typing indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0.75rem 1rem;
    background: var(--bubble-ai-bg);
    border: 1px solid var(--bubble-ai-border);
    border-radius: var(--radius-lg);
    border-bottom-left-radius: var(--radius-sm);
    width: fit-content;
    box-shadow: var(--shadow-xs);
}

.typing-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--text-muted);
    animation: typing-bounce 1.2s ease-in-out infinite;
}

.typing-dot:nth-child(1) { animation-delay: 0s; }
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing-bounce {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.4;
    }
    30% {
        transform: translateY(-4px);
        opacity: 1;
    }
}

/* =============================================
   BARRE D'ENTRÉE CHAT
   ============================================= */
.chat-input-area {
    flex-shrink: 0;
    padding: 1rem;
    background: var(--bg-surface);
    border-top: 1px solid var(--border);
}

@media (min-width: 1200px) {
    .chat-input-area {
        padding: 1rem 15%;
    }
}

.chat-input-bar {
    display: flex;
    align-items: flex-end;
    gap: 0.5rem;
    background: var(--input-bg);
    border: 1.5px solid var(--input-border);
    border-radius: var(--radius-xl);
    padding: 0.5rem 0.5rem 0.5rem 0.75rem;
    transition: border-color var(--transition), box-shadow var(--transition);
    box-shadow: var(--shadow-xs);
}

.chat-input-bar:focus-within {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.chat-input-bar:hover {
    border-color: var(--border-strong);
}

.chat-textarea {
    flex: 1;
    background: transparent;
    border: none;
    resize: none;
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--text-primary);
    max-height: 200px;
    min-height: 24px;
    padding: 4px 0;
    scrollbar-width: thin;
    font-family: inherit;
}

.chat-textarea:focus {
    outline: none;
}

.chat-textarea::placeholder {
    color: var(--input-placeholder);
}

.chat-input-actions {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    flex-shrink: 0;
}

.chat-input-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    font-size: 0.9rem;
}

.chat-input-btn.secondary {
    background: transparent;
    color: var(--text-muted);
}

.chat-input-btn.secondary:hover {
    background: var(--bg-surface-2);
    color: var(--text-secondary);
}

.chat-input-btn.voice.recording {
    color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
    animation: pulse-record 1.5s ease-in-out infinite;
}

@keyframes pulse-record {
    0%, 100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4); }
    50% { box-shadow: 0 0 0 6px rgba(239, 68, 68, 0); }
}

.chat-send-btn {
    background: var(--accent);
    color: white;
    border-radius: var(--radius);
    border: none;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all var(--transition);
    box-shadow: 0 2px 6px rgba(37, 99, 235, 0.3);
}

.chat-send-btn:hover:not(:disabled) {
    background: var(--accent-hover);
    transform: scale(1.05);
    box-shadow: 0 4px 10px rgba(37, 99, 235, 0.4);
}

.chat-send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
}

.chat-input-hint {
    text-align: center;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* Charter card dans chat */
.chat-charter {
    background: var(--bg-surface-2);
    border: 1px solid var(--warning);
    border-radius: var(--radius);
    padding: 1rem;
    margin: 0 auto;
    max-width: 500px;
}

/* =============================================
   CARTES & SURFACES GÉNÉRIQUES
   ============================================= */
.surface {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.surface-2 {
    background: var(--bg-surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

/* =============================================
   FORMULAIRES
   ============================================= */
.form-group {
    margin-bottom: 1rem;
}

.form-label-ds {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.375rem;
    letter-spacing: 0.01em;
}

.form-input-ds {
    width: 100%;
    background: var(--input-bg);
    border: 1.5px solid var(--input-border);
    border-radius: var(--radius);
    color: var(--input-text);
    font-size: 0.9rem;
    padding: 0.6rem 0.875rem;
    transition: border-color var(--transition), box-shadow var(--transition);
    font-family: inherit;
}

.form-input-ds:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.form-input-ds::placeholder {
    color: var(--input-placeholder);
}

/* =============================================
   BOUTONS DESIGN SYSTEM
   ============================================= */
.btn-ds {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    white-space: nowrap;
    font-family: inherit;
}

.btn-ds-primary {
    background: var(--accent);
    color: white;
    box-shadow: 0 2px 6px rgba(37, 99, 235, 0.25);
}

.btn-ds-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
    color: white;
    text-decoration: none;
}

.btn-ds-secondary {
    background: var(--bg-surface-2);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.btn-ds-secondary:hover {
    background: var(--bg-surface-3);
    color: var(--text-primary);
    text-decoration: none;
}

.btn-ds-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ds-ghost:hover {
    background: var(--bg-surface-2);
    color: var(--text-primary);
    text-decoration: none;
}

.btn-ds-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-ds-danger:hover {
    background: var(--danger);
    color: white;
    text-decoration: none;
}

.btn-ds-sm {
    padding: 0.3rem 0.625rem;
    font-size: 0.78rem;
}

.btn-ds-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

/* =============================================
   BADGES
   ============================================= */
.badge-ds {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.badge-ds-primary {
    background: var(--accent-light);
    color: var(--accent);
}

.badge-ds-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.badge-ds-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}

.badge-ds-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

/* =============================================
   STAT CARDS (DASHBOARD)
   ============================================= */
.stat-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    transition: all var(--transition-slow);
    box-shadow: var(--shadow-sm);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent);
}

.stat-card-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    margin-bottom: 1rem;
    background: var(--accent-light);
    color: var(--accent);
}

.stat-card-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 0.25rem;
}

.stat-card-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-card-action {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.8rem;
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    margin-top: 1rem;
    transition: gap var(--transition);
}

.stat-card-action:hover {
    gap: 0.625rem;
    color: var(--accent-hover);
    text-decoration: none;
}

/* =============================================
   PAGE HEADER
   ============================================= */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    gap: 1rem;
    flex-wrap: wrap;
}

.page-header-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.page-header-title i {
    color: var(--accent);
}

/* =============================================
   SESSION LIST (HISTORY)
   ============================================= */
.session-list-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    margin-bottom: 0.5rem;
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition);
    cursor: pointer;
}

.session-list-item:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
    text-decoration: none;
    color: var(--text-primary);
    background: var(--bg-hover);
}

.session-list-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    background: var(--accent-light);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.session-list-content {
    flex: 1;
    min-width: 0;
}

.session-list-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 2px;
}

.session-list-preview {
    font-size: 0.78rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.session-list-meta {
    font-size: 0.72rem;
    color: var(--text-muted);
    text-align: right;
    flex-shrink: 0;
}

/* =============================================
   TOGGLE THÈME
   ============================================= */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--radius);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
    font-size: 0.9rem;
}

.theme-toggle:hover {
    background: var(--sidebar-item-hover);
    color: var(--text-primary);
}

/* =============================================
   SCROLLBAR GLOBALE
   ============================================= */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

*::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

*::-webkit-scrollbar-track {
    background: transparent;
}

*::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: var(--radius-full);
}

/* =============================================
   TRANSITIONS DE THÈME
   ============================================= */
body,
.app-sidebar,
.top-navbar,
.chat-bubble.ai,
.chat-input-bar,
.surface,
.surface-2,
.stat-card,
.session-list-item {
    transition: background-color var(--transition-slow), 
                border-color var(--transition-slow),
                color var(--transition-slow),
                box-shadow var(--transition-slow);
}

/* =============================================
   COMPATIBILITÉ BOOTSTRAP (override minimal)
   ============================================= */
.app-content .container,
.app-content .container-fluid {
    padding-left: 0;
    padding-right: 0;
}

/* S'assurer que les pages hors chat gardent un padding */
.app-content.has-padding {
    padding: 1.5rem;
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 991.98px) {
    .app-content {
        padding: 1rem;
    }

    .chat-header {
        padding: 0.75rem 1rem;
    }
}

@media (max-width: 575.98px) {
    .chat-bubble-wrapper {
        max-width: 90%;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }
}