/* ═══════════════════════════════════════════════════════════
   Design System SE-UNSA Official Authority & Clean Modern Guidance
   Guide à l'usage des militants SE-Unsa (Éducation Nationale)
   Inspiré de https://www.se-unsa.org/
   ═══════════════════════════════════════════════════════════ */

/* ── 1. Reset, Variables & Tokens ────────────────────────── */

:root {
    /* Palette Officielle SE-Unsa */
    --bg-primary: #F8FAFC;
    --bg-secondary: #FFFFFF;
    --bg-tertiary: #F1F5F9;
    --surface: #FFFFFF;
    --surface-bright: #FFFFFF;
    --surface-container-lowest: #FFFFFF;
    --surface-container-low: #F1F5F9;
    --surface-container: #E2E8F0;
    --surface-container-high: #CBD5E1;
    --surface-container-highest: #94A3B8;
    --hairline: rgba(226, 232, 240, 0.8);
    --border-color: #E2E8F0;
    --glass-bg: rgba(255, 255, 255, 0.95);
    --glass-border: rgba(226, 232, 240, 0.8);
    --glass-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);

    /* Accent & Couleurs SE-Unsa */
    --primary: #009FE3;
    --primary-hover: #0084BE;
    --primary-dark: #005C8A;
    --accent: #009FE3;
    --accent-hover: #0084BE;
    --accent-container: #E5F5FC;
    --accent-glow: rgba(0, 159, 227, 0.18);
    --accent-subtle: #E5F5FC;
    
    --vibrant-lime: #B7D433;
    --vibrant-lime-dark: #4F6E08;
    --on-secondary-container: #4F6E08;
    --secondary-container: #F4F9E6;
    
    --warm-amber: #E74124;
    --unsa-coral: #E74124;
    --ink-black: #111928;

    /* Sémantique */
    --success: #4F6E08;
    --success-bg: #F4F9E6;
    --success-border: rgba(183, 212, 51, 0.4);
    --warning: #E74124;
    --warning-bg: #FFF7ED;
    --warning-border: rgba(231, 65, 36, 0.3);
    --error: #BA1A1A;
    --error-bg: #FFDAD6;
    --error-border: #FFCDD2;
    --info: #009FE3;
    --info-bg: #E5F5FC;
    --info-border: #BCE5F7;

    /* Texte contrasté AAA */
    --text-primary: #111928;
    --text-secondary: #475569;
    --text-muted: #64748B;
    --surface-hover: #F1F5F9;

    /* Typographie Officielle */
    --font: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    --font-heading: 'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Courier Prime', monospace;

    /* Rayons de courbure */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-pill: 9999px;
    --radius-chat-user: 16px 16px 0px 16px;
    --radius-chat-ai: 16px 16px 16px 0px;

    /* Transitions */
    --transition-fast: 120ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition: 180ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 250ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Safe Area Insets pour iOS Safari */
    --sat: env(safe-area-inset-top, 0px);
    --sab: env(safe-area-inset-bottom, 0px);
    --sal: env(safe-area-inset-left, 0px);
    --sar: env(safe-area-inset-right, 0px);
}

/* Base Reset */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -moz-text-size-adjust: 100%;
    text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    height: 100%;
    height: 100dvh;
}

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.55;
    min-height: 100vh;
    min-height: 100dvh;
    height: 100dvh;
    width: 100vw;
    overflow: hidden;
    touch-action: manipulation;
}



/* Images & Médias fluides */
img,
video,
svg {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Utilitaires Scrollbar */
.no-scrollbar::-webkit-scrollbar {
    display: none;
}
.no-scrollbar {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

/* ── 2. Screens & Navigation (Mobile-First) ───────────────── */

#login-screen,
#chat-screen {
    width: 100%;
    height: 100%;
    height: 100dvh;
    display: none;
}

#login-screen.active {
    display: flex;
}

#chat-screen.active {
    display: flex;
    flex-direction: row;
    overflow: hidden;
    position: relative;
}

/* Sidebar Drawer (Mobile par défaut) */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: 285px;
    max-width: 85vw;
    height: 100%;
    height: 100dvh;
    background: #ffffff;
    border-right: 1px solid var(--glass-border);
    z-index: 150;
    transform: translateX(-100%);
    transition: transform var(--transition-slow);
    box-shadow: 4px 0 24px rgba(15, 23, 42, 0.15);
    display: flex;
    flex-direction: column;
}

.sidebar.mobile-open {
    transform: translateX(0) !important;
}

/* Backdrop overlay pour fermer le menu sur mobile */
.sidebar-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.45);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 140;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-slow);
}

.sidebar-backdrop.active {
    opacity: 1;
    pointer-events: auto;
}

/* ── 3. Chat Main Canvas & Messages ──────────────────────── */

.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    height: 100dvh;
    min-width: 0;
    position: relative;
    overflow: hidden;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 14px 12px 115px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    width: 100%;
}

.chat-messages::-webkit-scrollbar {
    width: 5px;
}
.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}
.chat-messages::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

/* Bulles de Messages (Mobile-First) */
.status-pulse-dot {
    animation: statusPulse 2.2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes statusPulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.45; transform: scale(0.8); }
}

.message {
    display: flex;
    gap: 8px;
    width: 100%;
    max-width: 100%;
    animation: fadeInUp 0.22s ease-out;
    scroll-margin-top: 16px;
}

.message.user {
    align-self: flex-end;
    flex-direction: row-reverse;
    margin-left: auto;
    max-width: 88%;
}

.message.bot {
    align-self: flex-start;
    margin-right: auto;
    max-width: 100%;
    scroll-margin-top: 20px;
}

.message-avatar {
    width: 28px;
    height: 28px;
    min-width: 28px;
    min-height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: #ffffff;
    border: 1px solid #e2e8f0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    margin-top: 2px;
}

.message.user .message-avatar {
    display: none; /* Épuré sur mobile pour maximiser l'espace de lecture */
    background: var(--accent-subtle);
    border: 1px solid rgba(0, 88, 188, 0.2);
    color: var(--accent);
}

.avatar-logo-img {
    width: 20px;
    height: 20px;
    object-fit: contain;
}

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

.message-bubble {
    padding: 14px 18px;
    line-height: 1.6;
    font-size: 0.95rem;
    word-break: break-word;
    overflow-wrap: break-word;
}

.message.bot .message-bubble {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-chat-ai);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.03);
    color: var(--text-primary);
}

.message.user .message-bubble {
    background: var(--primary);
    border: 1px solid rgba(0, 143, 207, 0.3);
    border-radius: var(--radius-chat-user);
    color: #ffffff;
    box-shadow: 0 2px 12px rgba(0, 159, 227, 0.25);
}

/* ── 4. Rendu Juridique & Markdown Typographie ───────────── */

.rag-heading-1,
.rag-heading-2,
.rag-heading-3,
.rag-heading-4 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    font-weight: 700;
    margin: 18px 0 10px 0;
    display: flex;
    align-items: center;
    gap: 8px;
    line-height: 1.35;
}

.rag-heading-1 {
    font-size: clamp(1.05rem, 2.4vw, 1.25rem);
    border-bottom: 2px solid var(--primary);
    padding-bottom: 6px;
    color: var(--primary);
    letter-spacing: -0.01em;
}

.rag-heading-2 {
    font-size: clamp(0.98rem, 2vw, 1.1rem);
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 4px;
}

.rag-heading-3 {
    font-size: 0.95rem;
    color: var(--primary);
    font-weight: 700;
}

.rag-heading-4 {
    font-size: 0.88rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.rag-paragraph {
    margin-bottom: 14px;
    line-height: 1.7;
    font-size: 0.92rem;
    color: var(--text-primary);
}

/* Tableaux Markdown RAG (Mobile Horizontal Scrollable) */
.rag-table-wrapper {
    margin: 16px 0 20px 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background: #ffffff;
    max-width: 100%;
}

.rag-table {
    width: 100%;
    min-width: 480px;
    border-collapse: collapse;
    font-size: 0.84rem;
    line-height: 1.55;
    text-align: left;
}

.rag-table th {
    background: var(--surface-container-low);
    color: var(--text-primary);
    font-weight: 700;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
    font-family: var(--font-heading);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.rag-table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    vertical-align: top;
}

.rag-table tr:last-child td {
    border-bottom: none;
}

.rag-table tr:nth-child(even) td {
    background: #fafafa;
}

.rag-table tr:hover td {
    background: var(--surface-container-low);
}

/* Listes ordonnées et à puces sobres */
.rag-ordered-list {
    margin: 10px 0 16px 20px;
    padding-left: 4px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    list-style-type: decimal;
    font-size: 0.92rem;
}

.rag-bullet-list {
    margin: 10px 0 16px 0;
    padding-left: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
    list-style: none;
    font-size: 0.92rem;
}

.rag-bullet-list li {
    position: relative;
    padding-left: 18px;
    line-height: 1.65;
    color: var(--text-primary);
}

.rag-bullet-list li::before {
    content: '—';
    position: absolute;
    left: 0;
    top: 0;
    color: var(--primary);
    font-weight: bold;
}

.rag-ordered-list li {
    line-height: 1.65;
    color: var(--text-primary);
}

.rag-ordered-list li strong,
.rag-bullet-list li strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Callouts statutaires institutionnels (Sans icône) */
.rag-callout {
    margin: 16px 0;
    padding: 14px 18px;
    border-radius: 12px;
    font-size: 0.88rem;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    gap: 6px;
    border: 1px solid var(--border-color);
}

.rag-callout-header {
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding-bottom: 4px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.rag-callout-warning {
    background: #FFFDF5;
    border-left: 4px solid var(--warm-amber);
    color: #5C2B04;
}

.rag-callout-warning .rag-callout-header {
    color: var(--warm-amber);
    border-color: rgba(231, 65, 36, 0.2);
}

.rag-callout-danger {
    background: #FFF5F5;
    border-left: 4px solid var(--error);
    color: #7A0B0B;
}

.rag-callout-danger .rag-callout-header {
    color: var(--error);
    border-color: rgba(186, 26, 26, 0.2);
}

.rag-callout-info {
    background: #F4F9FC;
    border-left: 4px solid var(--primary);
    color: #0E3D52;
}

.rag-callout-info .rag-callout-header {
    color: var(--primary);
    border-color: rgba(0, 159, 227, 0.2);
}

.rag-blockquote {
    margin: 16px 0;
    padding: 12px 18px;
    background: var(--surface-container-low);
    border-left: 4px solid var(--primary);
    border-top: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    border-radius: 8px;
    font-style: italic;
    color: var(--text-primary);
    font-size: 0.9rem;
    line-height: 1.6;
}

.rag-citation-tag,
.rag-inline-cite {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: var(--surface-container-low);
    color: #007BB3;
    padding: 2px 8px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.78rem;
    border: 1px solid rgba(0, 159, 227, 0.3);
    text-decoration: none;
    transition: var(--transition-fast);
    vertical-align: baseline;
}

.rag-citation-tag:hover,
.rag-inline-cite:hover {
    background: var(--primary-container);
    color: var(--primary);
    border-color: var(--primary);
    text-decoration: none;
}

.rag-divider {
    border: 0;
    height: 1px;
    background: var(--border-color);
    margin: 20px 0;
}

/* ── 5. Message Meta, Sources & Actions Bar ──────────────── */

.confidence-badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: var(--radius-pill);
    font-size: 0.68rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.confidence-high {
    background: #F4F9E6;
    color: #4F6E08;
    border: 1px solid #B7D433;
}

.confidence-medium {
    background: #FFF7ED;
    color: #C2410C;
    border: 1px solid #FB923C;
}

.confidence-low {
    background: #FFDAD6;
    color: #93000A;
    border: 1px solid #FFCDD2;
}

.msg-action-btn {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    background: var(--surface-container-low);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-pill);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-fast);
    min-height: 34px;
}

.msg-action-btn:hover {
    background: var(--surface-bright);
    color: var(--primary);
    border-color: var(--primary);
}

.msg-action-btn.copied {
    background: #F4F9E6;
    border-color: var(--vibrant-lime);
    color: #4F6E08;
}

.sources-section {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--hairline);
}

.sources-title {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-family: var(--font-heading);
}

.sources-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
}

.source-item-card {
    background: var(--surface-bright);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    transition: var(--transition);
}

.source-item-card:hover {
    background: #ffffff;
    border-color: var(--accent);
}

.source-item-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
    margin-bottom: 2px;
}

.source-type-pill {
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    background: #ffffff;
    color: var(--accent);
    border: 1px solid var(--hairline);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
}

.source-item-title {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.35;
    font-family: var(--font-heading);
}

.source-item-article {
    font-size: 0.75rem;
    color: var(--vibrant-lime-dark, #4F6E08);
    font-weight: 600;
}

.source-link-btn {
    margin-top: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    text-decoration: none;
    align-self: flex-start;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    min-height: 26px;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.source-link-btn:hover {
    text-decoration: underline;
}

.source-score {
    font-size: 0.68rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.score-high { background: #ffffff; color: var(--vibrant-lime-dark, #4F6E08); border: 1px solid var(--vibrant-lime-dark, #4F6E08); }
.score-medium { background: #ffffff; color: var(--warm-amber, #E74124); border: 1px solid var(--warm-amber, #E74124); }
.score-low { background: #ffffff; color: var(--error); border: 1px solid var(--error); }

/* Indicateur de frappe */
.typing-indicator {
    display: flex;
    gap: 5px;
    padding: 10px 16px;
}

.typing-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--text-muted);
    animation: typingBounce 1.4s infinite;
}

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

@keyframes typingBounce {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-5px); opacity: 1; }
}

/* ── 6. Modales (Mobile-First Bottom Sheet & Desktop Dialog) ── */

.corpus-panel {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    z-index: 300;
    animation: fadeIn 0.2s ease-out;
}

.corpus-modal {
    width: 100%;
    height: 94dvh;
    max-height: 94dvh;
    background: #ffffff;
    border-top: 1px solid var(--hairline);
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    animation: slideUpModal 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.15);
    overflow: hidden;
}

.corpus-tab-btn {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    transition: var(--transition-fast);
}

.corpus-tab-btn.active {
    color: #ffffff;
    background: var(--accent);
    border-color: var(--accent);
    box-shadow: none;
}

.tab-pane {
    display: none;
    height: 100%;
}

.tab-pane.active {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

/* Grille KPI (Editorial Hairline Grid) */
.corpus-kpi-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.kpi-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--surface);
    border-bottom: 1px solid var(--hairline);
    border-left: 1px solid var(--hairline);
    border-radius: var(--radius-sm);
}

.kpi-icon-wrap {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: var(--surface-container-low);
    color: var(--accent);
}

.kpi-data {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.kpi-val {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--accent);
    line-height: 1.2;
    font-family: var(--font-heading);
}

.kpi-lbl {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Cartes de corpus */
.corpus-card {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 14px 16px;
    background: var(--surface);
    border-bottom: 1px solid var(--hairline);
    border-left: 1px solid var(--hairline);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.corpus-card:hover {
    background: var(--surface-bright);
    border-color: var(--accent);
}

.card-main {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    width: 100%;
}

.card-icon-wrap {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface-container-low);
    color: var(--accent);
    flex-shrink: 0;
    margin-top: 1px;
}

.card-details {
    flex: 1;
    min-width: 0;
}

.card-title {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
    line-height: 1.35;
    font-family: var(--font-heading);
}

.card-tags {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-wrap: wrap;
}

.tag-badge {
    padding: 2px 7px;
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    font-weight: 600;
    background: var(--surface-bright);
    border: 1px solid var(--hairline);
    color: var(--text-secondary);
    text-transform: uppercase;
}

.tag-pe, .tag-certifie, .tag-agrege, .tag-plp, .tag-eps, .tag-cpe, .tag-psyen {
    background: #ffffff;
    color: var(--primary);
    border-color: var(--primary);
}

.tag-contractuel {
    background: #ffffff;
    color: var(--warm-amber, #E74124);
    border-color: var(--warm-amber, #E74124);
}

.tag-commun {
    background: #ffffff;
    color: var(--vibrant-lime-dark, #4F6E08);
    border-color: var(--vibrant-lime-dark, #4F6E08);
}

.card-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 6px;
    padding-top: 8px;
    border-top: 1px solid var(--hairline);
}

/* Inspecteur de Chunks */
.chunk-item {
    background: #ffffff;
    border: 1px solid #cbd5e1;
    border-radius: var(--radius-md);
    padding: 12px 14px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

.chunk-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 8px;
    padding-bottom: 6px;
    border-bottom: 1px solid #f1f5f9;
}

.chunk-label {
    font-weight: 700;
    font-size: 0.82rem;
    color: var(--accent);
}

.chunk-body {
    font-size: 0.8rem;
    line-height: 1.55;
    color: var(--text-primary);
    white-space: pre-wrap;
    background: #f8fafc;
    padding: 10px;
    border-radius: var(--radius-sm);
    border: 1px solid #e2e8f0;
    word-break: break-word;
}

/* ── 7. Toast Notifications ──────────────────────────────── */

.toast-container {
    position: fixed;
    bottom: calc(20px + var(--sab));
    left: 16px;
    right: 16px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
    align-items: center;
}

.toast {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background: #ffffff;
    border: 1px solid #cbd5e1;
    border-radius: var(--radius-md);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.12);
    color: var(--text-primary);
    font-size: 0.82rem;
    pointer-events: auto;
    width: 100%;
    max-width: 380px;
    transform: translateY(20px);
    opacity: 0;
    transition: transform 0.25s ease, opacity 0.25s ease;
}

.toast-show {
    transform: translateY(0);
    opacity: 1;
}

.toast-hide {
    transform: translateY(-10px);
    opacity: 0;
}

.toast-success { border-left: 4px solid var(--success); }
.toast-error { border-left: 4px solid var(--error); }
.toast-warning { border-left: 4px solid var(--warning); }
.toast-info { border-left: 4px solid var(--info); }

.toast-icon-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.toast-content {
    flex: 1;
    min-width: 0;
    word-break: break-word;
}

.toast-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toast-close:hover {
    color: var(--text-primary);
    background: var(--surface-hover);
}

/* ── 8. Animations ───────────────────────────────────────── */

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.94);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes popBadge {
    0% { transform: scale(0.8); opacity: 0; }
    70% { transform: scale(1.05); }
    100% { transform: scale(1); opacity: 1; }
}

.confidence-badge {
    animation: popBadge 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

@keyframes slideUpModal {
    from {
        opacity: 0;
        transform: translateY(100%);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ═══════════════════════════════════════════════════════════
   9. Media Queries Ascendantes (Mobile-First Progression)
   ═══════════════════════════════════════════════════════════ */

/* ── Tablet Portrait (>= 640px) ──────────────────────────── */
@media (min-width: 640px) {
    .chat-messages {
        padding: 20px 24px 125px;
        gap: 20px;
    }

    .message {
        max-width: 90%;
        gap: 12px;
    }

    .message-bubble {
        padding: 16px 20px;
        font-size: 0.95rem;
    }

    .sources-grid {
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    }

    .corpus-modal {
        height: auto;
        max-height: 88vh;
        border-radius: var(--radius-xl);
        border: 1px solid var(--glass-border);
        box-shadow: 0 25px 50px -12px rgba(15, 23, 42, 0.25);
    }

    .corpus-card {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }

    .card-actions {
        padding-top: 0;
        border-top: none;
    }

    .corpus-kpi-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 12px;
    }

    .toast-container {
        left: auto;
        right: 24px;
    }
}

/* ── Tablet Paysage & Laptop (>= 768px) ───────────────────── */
@media (min-width: 768px) {
    .sidebar {
        position: relative;
        transform: none !important;
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.03);
        z-index: 40;
    }

    .sidebar.collapsed {
        margin-left: -285px;
    }

    .sidebar-backdrop {
        display: none !important;
    }

    .message {
        max-width: 85%;
    }

    .corpus-kpi-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ── Desktop Standard (>= 1024px) ────────────────────────── */
@media (min-width: 1024px) {
    .chat-messages {
        padding: 24px 32px 135px;
    }

    .message-bubble {
        padding: 18px 22px;
    }
}

/* ── Grand Écran (>= 1440px) ─────────────────────────────── */
@media (min-width: 1440px) {
    .chat-messages {
        max-width: 1200px;
        margin: 0 auto;
    }
}


/* ═══════════════════════════════════════════════════════════
   10. Nouveaux Composants Mobile-First (Refonte UI/UX)
   ═══════════════════════════════════════════════════════════ */

/* ── A. Header épuré ─────────────────────────────────────── */

.hamburger-btn,
.sidebar-close-btn {
    /* Cibles tactiles AAA — 44 × 44px garantis par w-10 h-10 */
    touch-action: manipulation;
}

.header-status {
    transition: var(--transition-fast);
}

/* ── B. Bottom Navigation Bar ────────────────────────────── */

.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: calc(3.5rem + env(safe-area-inset-bottom, 0px));
    padding-bottom: env(safe-area-inset-bottom, 0px);
    background: var(--surface);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: stretch;
    justify-content: space-around;
    z-index: 100;
    box-shadow: 0 -2px 16px rgba(0, 0, 0, 0.06);
}

.bottom-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    color: var(--text-muted);
    font-size: 0.65rem;
    font-weight: 600;
    font-family: var(--font-heading);
    letter-spacing: 0.02em;
    text-transform: uppercase;
    background: transparent;
    border: none;
    cursor: pointer;
    transition: color var(--transition-fast);
    padding-bottom: 2px;
    min-width: 0;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.bottom-nav-item svg {
    transition: transform var(--transition-fast), stroke-width var(--transition-fast);
}

.bottom-nav-item:active svg {
    transform: scale(0.88);
}

.bottom-nav-item.active {
    color: var(--primary);
}

.bottom-nav-item.active svg {
    stroke-width: 2.5;
}

/* ── C. Boutons Envoyer / Arrêter (icônes) ──────────────── */

.send-btn-icon,
.stop-btn-icon {
    flex-shrink: 0;
    touch-action: manipulation;
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.send-btn-icon:disabled {
    background: var(--surface-container-high);
    cursor: not-allowed;
    opacity: 0.5;
}

.send-btn-icon:disabled svg {
    color: var(--text-muted);
}

/* ── D. Bulles utilisateur cyan — enfants blancs ─────────── */

.message.user .message-bubble strong,
.message.user .message-bubble em,
.message.user .message-bubble a,
.message.user .message-bubble code {
    color: rgba(255, 255, 255, 0.92);
}

.message.user .message-bubble {
    animation: fadeInUp 0.22s ease-out, msgUserPop 0.22s ease-out;
    transform-origin: bottom right;
}

@keyframes msgUserPop {
    0%   { transform: scale(0.97); }
    60%  { transform: scale(1.015); }
    100% { transform: scale(1); }
}

/* ── E. Suggestions rapides — Horizontal Scroll Mobile ──── */

.topic-chips-scroll {
    overflow: hidden;
    width: 100%;
}

.topic-chips-track {
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
}

.topic-chip {
    /* Largeur fixe sur mobile pour affordance de scroll */
    min-width: 155px;
    max-width: 195px;
    scroll-snap-align: start;
    min-height: 64px;
}

@media (min-width: 640px) {
    .topic-chip {
        min-width: unset;
        max-width: unset;
        scroll-snap-align: unset;
        min-height: 44px;
    }
}

/* ── F. Swipe-to-close sidebar (hint visuel) ─────────────── */

.sidebar::after {
    content: '';
    position: absolute;
    top: 0;
    right: -1px;
    width: 4px;
    height: 100%;
    background: linear-gradient(to right, transparent, rgba(0, 159, 227, 0.07));
    pointer-events: none;
}

/* ── Corrections accessibilité globales ──────────────────── */

/* Focus ring visible sur tous les éléments interactifs */
:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: 4px;
}

/* Anti-zoom iOS : tous les inputs à font-size >= 16px */
#chat-input,
input[type="text"],
input[type="password"],
input[type="email"],
input[type="url"],
textarea,
select {
    font-size: 16px !important;
}

/* Chat-messages : padding-bottom majoré sur mobile
   pour dépasser bottom-nav + input dock + safe area */
@media (max-width: 767px) {
    .chat-messages {
        padding-bottom: calc(168px + env(safe-area-inset-bottom, 0px)) !important;
    }
}