/* ============================================================
   Komsolution Design System — Source unique de verite
   Remplace: design-system.css, main.css, responsive.css,
             cosmetics.css, a11y-perf.css
   ============================================================ */

/* ── Tokens ── */
:root {
    /* Palette Komsolution */
    --ds-noir:          #0A0A0A;
    --ds-bleu:          #85A7D7;
    --ds-bleu-profond:  #4A6E8A;
    --ds-charbon:       #2D2D2D;
    --ds-creme:         #F7F6F4;
    --ds-blanc:         #FFFFFF;

    /* Couleurs fonctionnelles */
    --ds-success:       #059669;
    --ds-success-light: #D1FAE5;
    --ds-success-dark:  #065F46;
    --ds-warning:       #F59E0B;
    --ds-warning-light: #FEF3C7;
    --ds-warning-dark:  #92400E;
    --ds-danger:        #EF4444;
    --ds-danger-light:  #FEE2E2;
    --ds-danger-dark:   #991B1B;
    --ds-info:          #3B82F6;
    --ds-info-light:    #DBEAFE;
    --ds-info-dark:     #1E40AF;

    /* Texte */
    --ds-text:          #1E1E1E;
    --ds-text-secondary:#6B6B6B;
    --ds-text-muted:    #9A9A9A;

    /* Surfaces et bordures */
    --ds-border:        #E2E0DC;
    --ds-surface:       #FFFFFF;
    --ds-surface-alt:   #F7F6F4;

    /* Semantic aliases (backward compat) */
    --color-primary:       var(--ds-bleu-profond);
    --color-primary-light: rgba(74,110,138,0.08);
    --color-primary-hover: rgba(74,110,138,0.1);
    --color-text:          var(--ds-charbon);
    --color-text-primary:  var(--ds-text);
    --color-text-secondary:var(--ds-text-secondary);
    --color-text-muted:    var(--ds-text-muted);
    --color-text-inverse:  var(--ds-blanc);
    --color-surface:       var(--ds-surface);
    --color-surface-solid: var(--ds-blanc);
    --color-surface-bg:    var(--ds-creme);
    --color-border:        var(--ds-border);
    --color-border-solid:  #E5E7EB;
    --color-page-bg:       #ECEAE6;
    --color-success:       var(--ds-success);
    --color-success-light: var(--ds-success-light);
    --color-warning:       var(--ds-warning);
    --color-warning-light: var(--ds-warning-light);
    --color-danger:        var(--ds-danger);
    --color-danger-light:  var(--ds-danger-light);
    --color-info:          var(--ds-info);
    --color-info-light:    var(--ds-info-light);

    /* Espacement */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;

    /* Typographie */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: Georgia, 'Times New Roman', serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;

    /* Rayons */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Ombres */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --shadow-xl: 0 12px 40px rgba(0,0,0,0.15);

    /* Aliases manquants */
    --ds-muted: #7A7875;
    --radius: 8px;
    --transition-base: 200ms ease;
    --color-muted: var(--ds-text-muted);
    --color-bg: var(--ds-creme);

    /* Transitions */
    --transition: 200ms ease;
    --transition-fast: 150ms ease;
    --transition-slow: 300ms ease;

    /* Z-index */
    --z-sticky: 100;
    --z-overlay: 400;
    --z-modal: 500;
    --z-tooltip: 600;
    --z-toast: 700;
}

/* ── Reset ── */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    background: var(--color-page-bg);
    margin: 0;
    min-height: 100vh;
}

::selection { background: var(--color-primary-light); color: var(--color-primary); }

/* ── App Layout ── */
.app-layout {
    display: flex;
    flex-direction: row;
    min-height: 100vh;
    width: 100%;
}

/* ── Sidebar ── */
.app-sidebar {
    width: 220px;
    min-width: 220px;
    flex-shrink: 0;
    min-height: 100vh;
    position: sticky;
    top: 0;
    align-self: flex-start;
    display: flex;
    flex-direction: column;
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    z-index: var(--z-sticky);
}

.app-sidebar-brand {
    padding: 20px 20px 16px;
    border-bottom: 1px solid var(--color-border);
}

.app-sidebar-brand a {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-decoration: none;
}

.app-sidebar-brand img {
    height: 26px;
    opacity: 0.90;
    max-width: 140px;
    object-fit: contain;
}

.sidebar-brand-sub {
    font-size: 9px;
    letter-spacing: 0.8px;
    color: var(--ds-bleu);
    text-transform: uppercase;
    margin-top: 4px;
    font-weight: 600;
}

.app-sidebar-nav {
    display: flex;
    flex-direction: column;
    padding: 12px 0;
    flex: 1;
    gap: 2px;
}

.app-sidebar-nav .nav-tab {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    border-radius: 0;
    font-size: 13px;
    white-space: nowrap;
    border-left: 2px solid transparent;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition);
}

.app-sidebar-nav .nav-tab svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    flex-shrink: 0;
}

.app-sidebar-nav .nav-tab .nav-label {
    display: inline;
}

.app-sidebar-nav .nav-tab:hover {
    color: var(--color-text-primary);
    background: var(--color-primary-light);
}

.app-sidebar-nav .nav-tab.active {
    color: var(--color-primary);
    font-weight: 700;
    background: var(--color-primary-light);
    border-left-color: var(--color-primary);
}

/* ── Sidebar footer (user) ── */
.app-sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: auto;
}
.sidebar-avatar {
    width: 30px; height: 30px; border-radius: 50%;
    background: var(--color-primary-light);
    display: flex; align-items: center; justify-content: center;
    font-size: 11px; font-weight: 700; color: var(--color-primary);
    flex-shrink: 0;
}
.sidebar-user-info { flex: 1; min-width: 0; }
.sidebar-user-name {
    display: block; font-size: 0.8rem; font-weight: 600;
    color: var(--color-text-primary);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.sidebar-user-role {
    display: block; font-size: 0.7rem; color: var(--color-text-muted);
}

/* ── Main area ── */
.app-main {
    flex: 1;
    min-width: 0;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
}

/* ── Topbar / Header ── */
.header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) var(--space-8);
    width: 100%;
}

.topbar-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text-primary);
    margin: 0;
}

/* ── User Section (topbar) ── */
.user-section {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.notifications {
    position: relative;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.03);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition);
}

.notifications svg { stroke: var(--color-text-muted); }
.notifications:hover { background: rgba(0,0,0,0.06); }

.notification-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    background: var(--ds-danger);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-2);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition);
}

.user-profile:hover { background: rgba(0,0,0,0.03); }

.user-info {
    display: flex;
    flex-direction: column;
    margin-right: var(--space-2);
}

.user-name {
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.user-role {
    color: var(--color-text-secondary);
    font-size: var(--font-size-xs);
}

.btn-logout {
    width: 42px;
    height: 42px;
    background: rgba(0,0,0,0.03);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}

.btn-logout svg { stroke: var(--color-text-muted); transition: all var(--transition); }
.btn-logout:hover { background: rgba(0,0,0,0.06); }
.btn-logout:hover svg { stroke: var(--ds-danger); }

/* ── Theme toggle ── */
.theme-toggle {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.03);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition);
}

.theme-toggle:hover { background: rgba(0,0,0,0.06); }
.theme-toggle svg { stroke: var(--color-text-secondary); }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
html.dark .theme-toggle .icon-sun { display: block; }
html.dark .theme-toggle .icon-moon { display: none; }

/* ── Page content ── */
.main-content,
.page-content {
    padding: var(--space-8) var(--space-8);
    width: 100%;
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    scroll-behavior: smooth;
}

/* ── Nav overlay (mobile) ── */
.nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: calc(var(--z-modal) - 1);
}

/* ── Hamburger ── */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 28px;
    height: 22px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
}

.hamburger span {
    display: block;
    height: 3px;
    width: 100%;
    background: var(--color-text-muted);
    border-radius: 2px;
    transition: all var(--transition-slow);
}

.hamburger.open span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }

/* ── Skip nav ── */
.skip-nav {
    position: fixed;
    top: -100%;
    left: var(--space-4);
    background: var(--color-primary);
    color: var(--color-text-inverse);
    padding: var(--space-2) var(--space-4);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    font-weight: 600;
    font-size: var(--font-size-sm);
    text-decoration: none;
    z-index: 9999;
    transition: top var(--transition);
}
.skip-nav:focus { top: 0; }

/* ── Focus visible ── */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* ── Toast container ── */
.toast-container {
    position: fixed;
    top: var(--space-6);
    right: var(--space-6);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.15); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: rgba(0,0,0,0.25); }

/* ── Tooltips ── */
[data-tooltip] { position: relative; }
[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 10px;
    background: var(--color-text-primary);
    color: var(--color-text-inverse);
    font-size: 12px;
    font-weight: 500;
    border-radius: 6px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
    z-index: var(--z-tooltip);
}
[data-tooltip]:hover::after { opacity: 1; }

/* ── Skeleton loading ── */
.skeleton {
    background: linear-gradient(90deg, rgba(0,0,0,0.04) 25%, rgba(0,0,0,0.08) 50%, rgba(0,0,0,0.04) 75%);
    background-size: 200% 100%;
    animation: skeleton 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}
@keyframes skeleton {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ── Session warning ── */
.session-warning {
    position: fixed;
    bottom: var(--space-6);
    left: 50%;
    transform: translateX(-50%);
    background: var(--ds-warning);
    color: white;
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--font-size-sm);
    box-shadow: 0 4px 16px rgba(245,158,11,0.4);
    z-index: 9000;
    display: none;
    align-items: center;
    gap: var(--space-2);
}
.session-warning.visible { display: flex; }
.session-timeout-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: var(--ds-danger);
    z-index: 9001;
    transition: width 1s linear;
}

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: .001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .001ms !important;
        scroll-behavior: auto !important;
    }
}

/* ── High contrast ── */
@media (prefers-contrast: high) {
    .nav-tab { border: 1px solid currentColor; }
    .stat-card, .glass-card { border: 2px solid var(--color-text-primary); }
    .badge { outline: 1px solid currentColor; }
}

/* ── Print ── */
@media print {
    .app-sidebar, .header, .hamburger, .toast-container,
    .search-overlay, .notif-panel, .btn-logout, .theme-toggle,
    .btn-export-pdf { display: none !important; }
    .app-main { width: 100%; }
    .main-content, .page-content { padding: 0 !important; overflow: visible !important; }
    body { background: white !important; overflow: visible !important; height: auto !important; }
    .glass-card, .stat-card, .table-container { box-shadow: none !important; border: 1px solid #e5e7eb !important; }
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 1200px) {
    .header-content { padding: var(--space-4) var(--space-6); }
    .main-content, .page-content { padding: var(--space-6); }
}

@media (max-width: 1024px) {
    .hamburger { display: flex; }

    .app-sidebar {
        position: fixed;
        top: 0;
        left: -280px;
        width: 260px;
        min-width: 260px;
        height: 100vh;
        z-index: var(--z-modal);
        transition: left var(--transition-slow);
    }

    .app-sidebar.active { left: 0; }
    .nav-overlay.active { display: block; }
}

@media (max-width: 768px) {
    .header-content { padding: var(--space-3) var(--space-4); }
    .main-content, .page-content { padding: var(--space-4); }

    .user-info { display: none; }
    .user-section { gap: var(--space-3); }
}

@media (max-width: 480px) {
    .header-content { padding: var(--space-2) var(--space-3); }
    .main-content, .page-content { padding: var(--space-3); }
    .notifications, .btn-logout { width: 36px; height: 36px; }

    .toast-container {
        top: auto;
        bottom: var(--space-4);
        right: var(--space-4);
        left: var(--space-4);
    }
}

/* ── View Transitions API ── */
@view-transition { navigation: auto; }

/* Éléments stables — aucune animation */
::view-transition-old(sidebar),
::view-transition-new(sidebar),
::view-transition-old(app-header),
::view-transition-new(app-header),
::view-transition-old(user-profile),
::view-transition-new(user-profile) {
    animation: none;
}

/* Contenu principal — slide fluide */
::view-transition-old(main-content) {
    animation: 150ms ease-out vt-slide-out;
}
::view-transition-new(main-content) {
    animation: 200ms ease-in vt-slide-in;
}

@keyframes vt-slide-out {
    to { opacity: 0; transform: translateX(-16px); }
}
@keyframes vt-slide-in {
    from { opacity: 0; transform: translateX(16px); }
}

@media (prefers-reduced-motion: reduce) {
    ::view-transition-old(root),
    ::view-transition-new(root) { animation: none; }
}

/* HTMX indicator */
.htmx-indicator { opacity: 0; }
.htmx-request .htmx-indicator { opacity: 1; }
.htmx-request.htmx-indicator { opacity: 1; }

/* Navigation fluide — fade-in au chargement de page */
@keyframes pageFadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to   { opacity: 1; transform: translateY(0); }
}
.main-content {
    animation: pageFadeIn 0.18s ease-out;
}
@media (prefers-reduced-motion: reduce) {
    .main-content { animation: none; }
}