/* ==========================================================================
   TTK — CHROME PUBLIC (header fixe + nav mobile + footer marketing)
   --------------------------------------------------------------------------
   Remplace le chrome public de mentor-futuriste.css. Utilisé par _Layout
   uniquement (pages publiques). Décor de fond (orbes + grille) : fondation.
   Corrections vs legacy :
   - hauteur de l'en-tête via token (--ttk-site-header-height : les pages
     publiques migrées compensent ce même 80px via leur --ttk-*-header-offset) ;
   - couleurs/typo via tokens (--ttk-) au lieu des tokens fantômes historiques
     (--tt-, --mf-) — attention : ne jamais écrire « étoile + slash » dans un
     commentaire, la séquence ferme le bloc et le parseur jette la règle suivante ;
   - plans : header 1000 < panneau mobile 1050 < hamburger 1100 < modale ttk
     (--ttk-z-modal 1200) < toasts (--ttk-z-toast).
   Le panneau mobile est piloté par le collapse Bootstrap (états .show /
   .collapsing émis par bootstrap.bundle — mécanisme tiers, pas un état .is-*).
   Réf. : docs/charte-graphique.md
   ========================================================================== */

:root {
    --ttk-site-header-height: 80px;
}

/* ==========================================================================
   1. COQUE — body en colonne, main qui pousse le footer en bas
   ========================================================================== */
.ttk-site-body { display: flex; flex-direction: column; min-height: 100vh; position: relative; }
.ttk-site-main { flex: 1; padding-top: var(--ttk-site-header-height); }

/* ==========================================================================
   2. EN-TÊTE / NAVIGATION
   ========================================================================== */
.ttk-site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}
.ttk-site-nav {
    background: rgba(22, 21, 31, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--ttk-border);
    padding: 0.75rem 0;
}
.ttk-site-nav-container {
    max-width: var(--ttk-container-max);
    margin: 0 auto;
    padding: 0 var(--ttk-space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* -- Marque -- */
.ttk-site-brand {
    display: flex;
    align-items: center;
    gap: var(--ttk-space-3);
    text-decoration: none;
    flex-shrink: 0;
}
.ttk-site-logo {
    height: 40px;
    filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.6))
            drop-shadow(0 0 20px rgba(99, 102, 241, 0.5))
            drop-shadow(0 0 40px rgba(139, 92, 246, 0.3));
    transition: filter var(--ttk-transition);
}
.ttk-site-brand:hover .ttk-site-logo {
    filter: drop-shadow(0 0 12px rgba(255, 255, 255, 0.8))
            drop-shadow(0 0 30px rgba(99, 102, 241, 0.7))
            drop-shadow(0 0 50px rgba(139, 92, 246, 0.5));
}
.ttk-site-brand-text {
    font-family: var(--ttk-font-title);
    font-size: 1.35rem;
    font-weight: var(--ttk-weight-bold);
    background: linear-gradient(135deg, #ffffff 0%, var(--ttk-primary-light) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* -- Hamburger (3 barres CSS → croix quand aria-expanded=true) -- */
.ttk-site-nav-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--ttk-surface-2);
    border: none;
    border-radius: var(--ttk-radius-md);
    cursor: pointer;
    padding: 0;
    transition: background var(--ttk-transition-fast);
}
.ttk-site-nav-toggle:hover { background: var(--ttk-surface-3); }
.ttk-site-nav-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--ttk-text);
    border-radius: 2px;
    transition: transform var(--ttk-transition), opacity var(--ttk-transition);
    position: absolute;
}
.ttk-site-nav-toggle span:nth-child(1) { transform: translateY(-6px); }
.ttk-site-nav-toggle span:nth-child(2) { transform: translateY(0); }
.ttk-site-nav-toggle span:nth-child(3) { transform: translateY(6px); }

/* -- Panneau (desktop : rangée de liens ; mobile : volet off-canvas) --
   Sélecteur doublé : il doit battre le `.collapse:not(.show)` de Bootstrap
   (spécificité 0-2-0), qui masquerait la rangée desktop. */
.ttk-site-nav .ttk-site-nav-panel {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex: 1;
    margin-left: var(--ttk-space-8);
}
.ttk-site-links {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--ttk-space-2);
}
.ttk-site-links li a {
    display: block;
    padding: 0.6rem 1.1rem;
    color: var(--ttk-text-secondary);
    text-decoration: none;
    font-weight: var(--ttk-weight-medium);
    font-size: 0.95rem;
    border-radius: var(--ttk-radius-md);
    transition: color var(--ttk-transition-fast), background var(--ttk-transition-fast);
    position: relative;
}
.ttk-site-links li a:hover {
    color: var(--ttk-text);
    background: var(--ttk-surface-2);
}
.ttk-site-links li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--ttk-gradient-brand);
    transition: width var(--ttk-transition);
    transform: translateX(-50%);
    border-radius: 2px;
}
.ttk-site-links li a:hover::after { width: 60%; }
.ttk-site-actions {
    display: flex;
    align-items: center;
    gap: var(--ttk-space-4);
    margin-left: auto;
    flex-shrink: 0;
}

/* Tablette / petit portable */
@media (min-width: 992px) and (max-width: 1199.98px) {
    .ttk-site-nav-panel { margin-left: var(--ttk-space-4); }
    .ttk-site-links { gap: 0.25rem; }
    .ttk-site-links li a { padding: var(--ttk-space-2) var(--ttk-space-3); font-size: 0.9rem; }
}

/* Mobile : volet plein écran animé (collapse Bootstrap) */
@media (max-width: 991.98px) {
    .ttk-site-nav-toggle {
        display: flex;
        z-index: 1100;
        position: relative;
    }
    .ttk-site-nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(0) rotate(45deg); }
    .ttk-site-nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
    .ttk-site-nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(0) rotate(-45deg); }

    .ttk-site-nav-panel {
        position: fixed !important;
        top: 0 !important;
        left: 100% !important;
        right: auto !important;
        bottom: 0 !important;
        width: 50vw !important;
        height: 100vh !important;
        height: 100dvh !important;
        background: var(--ttk-bg) !important;
        display: none !important;
        flex-direction: column;
        flex: none !important;
        margin-left: 0 !important;
        justify-content: space-between;
        align-items: flex-start;
        padding: 4.5rem var(--ttk-space-4) var(--ttk-space-6) var(--ttk-space-4);
        z-index: 1050 !important;
        overflow-y: auto;
        transform: translateX(0);
        transition: transform var(--ttk-transition);
    }
    .ttk-site-nav-panel.collapsing {
        display: flex !important;
        transform: translateX(-50%);
    }
    .ttk-site-nav-panel.show {
        display: flex !important;
        transform: translateX(-100%);
    }

    .ttk-site-links {
        flex-direction: column;
        gap: 0.15rem;
        text-align: left;
        margin-bottom: 0;
        width: 100%;
        flex-shrink: 0;
    }
    .ttk-site-links li {
        opacity: 0;
        transform: translateX(20px);
        transition: opacity 0.4s ease, transform 0.4s ease;
    }
    .ttk-site-nav-panel.show .ttk-site-links li { opacity: 1; transform: translateX(0); }
    .ttk-site-nav-panel.show .ttk-site-links li:nth-child(1) { transition-delay: 0.1s; }
    .ttk-site-nav-panel.show .ttk-site-links li:nth-child(2) { transition-delay: 0.15s; }
    .ttk-site-nav-panel.show .ttk-site-links li:nth-child(3) { transition-delay: 0.2s; }
    .ttk-site-nav-panel.show .ttk-site-links li:nth-child(4) { transition-delay: 0.25s; }
    .ttk-site-nav-panel.show .ttk-site-links li:nth-child(5) { transition-delay: 0.3s; }

    .ttk-site-links li a {
        padding: var(--ttk-space-2) var(--ttk-space-3);
        font-size: 1rem;
        font-weight: var(--ttk-weight-semibold);
    }
    .ttk-site-links li a:hover {
        background: rgba(217, 119, 6, 0.15);
        color: var(--ttk-warm);
    }

    .ttk-site-actions {
        margin-top: auto;
        width: 100%;
        justify-content: center;
        padding: var(--ttk-space-2);
        flex-shrink: 0;
        opacity: 0;
        transform: translateY(20px);
        transition: opacity 0.4s ease 0.35s, transform 0.4s ease 0.35s;
        text-align: center;
    }
    .ttk-site-nav-panel.show .ttk-site-actions { opacity: 1; transform: translateY(0); }
}

/* Très petits écrans */
@media (max-width: 352px) {
    .ttk-site-nav-panel { width: 70vw !important; }
}

/* ==========================================================================
   3. FOOTER
   ========================================================================== */
.ttk-site-footer {
    background: linear-gradient(180deg, var(--ttk-bg) 0%, #0f0e16 100%);
    border-top: 1px solid var(--ttk-border);
    padding: var(--ttk-space-10) 0 var(--ttk-space-8);
    margin-top: auto;
}
.ttk-site-footer-container {
    max-width: var(--ttk-container-max);
    margin: 0 auto;
    padding: 0 var(--ttk-space-6);
}
.ttk-site-footer-brand {
    display: flex;
    align-items: center;
    gap: var(--ttk-space-3);
    margin-bottom: 1.25rem;
}
.ttk-site-footer-brand .ttk-site-logo { height: 36px; }
.ttk-site-footer-brand span {
    font-family: var(--ttk-font-title);
    font-size: 1.25rem;
    font-weight: var(--ttk-weight-bold);
    background: linear-gradient(135deg, #ffffff 0%, var(--ttk-primary-light) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.ttk-site-footer-desc {
    color: var(--ttk-text-muted);
    font-size: var(--ttk-text-sm);
    line-height: var(--ttk-leading-relaxed);
    max-width: 280px;
    margin-bottom: var(--ttk-space-6);
}
.ttk-site-footer-title {
    font-family: var(--ttk-font-title);
    font-size: var(--ttk-text-sm);
    font-weight: var(--ttk-weight-bold);
    color: var(--ttk-text);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1.25rem;
}
.ttk-site-footer-list { list-style: none; padding: 0; margin: 0; }
.ttk-site-footer-list li { margin-bottom: var(--ttk-space-3); }
.ttk-site-footer-list a {
    color: var(--ttk-text-muted);
    text-decoration: none;
    font-size: var(--ttk-text-sm);
    transition: color var(--ttk-transition-fast), padding-left var(--ttk-transition-fast);
}
.ttk-site-footer-list a:hover { color: var(--ttk-primary-light); padding-left: 5px; }
.ttk-site-footer-text { color: var(--ttk-text-muted); font-size: 0.85rem; }
.ttk-site-footer-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--ttk-space-2);
    margin-top: var(--ttk-space-8);
    padding-top: var(--ttk-space-8);
    border-top: 1px solid var(--ttk-border);
}
.ttk-site-footer-bottom p { color: var(--ttk-text-muted); font-size: 0.85rem; margin: 0; }
.ttk-site-footer-bottom a { color: var(--ttk-primary-light); text-decoration: none; transition: color var(--ttk-transition-fast); }
.ttk-site-footer-bottom a:hover { color: var(--ttk-text); }

@media (min-width: 768px) {
    .ttk-site-footer-bottom { flex-direction: row; justify-content: space-between; }
}

/* ==========================================================================
   4. IMPRESSION & ACCESSIBILITÉ
   ========================================================================== */
@media print {
    .ttk-site-header, .ttk-site-footer { display: none !important; }
    .ttk-site-main { padding-top: 0; }
}
@media (prefers-reduced-motion: reduce) {
    .ttk-site-nav-panel, .ttk-site-links li, .ttk-site-actions,
    .ttk-site-nav-toggle span, .ttk-site-logo { transition: none; }
}