/* ============================================================
   CHASIDE · Sistema de diseño (Fase 1: tokens y base)
   Solo apariencia: no afecta lógica, rutas ni controladores.
   ============================================================ */

:root {
    color-scheme: light dark;
    --accent: #4f46e5;
    --accent-strong: #4338ca;
    --accent-soft: rgba(79, 70, 229, .12);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #06b6d4;
    --ring: rgba(79, 70, 229, .35);
}

/* Acento dinámico por rol (clase puesta en <html> desde la sesión) */
.role-superadmin { --accent: #4f46e5; --accent-strong: #4338ca; --accent-soft: rgba(79, 70, 229, .12); --ring: rgba(79, 70, 229, .35); }
.role-examiner   { --accent: #0d9488; --accent-strong: #0f766e; --accent-soft: rgba(13, 148, 136, .12); --ring: rgba(13, 148, 136, .35); }
.role-student    { --accent: #7c3aed; --accent-strong: #6d28d9; --accent-soft: rgba(124, 58, 237, .12); --ring: rgba(124, 58, 237, .35); }
.role-guest      { --accent: #4f46e5; --accent-strong: #4338ca; --accent-soft: rgba(79, 70, 229, .12); --ring: rgba(79, 70, 229, .35); }

.accent-bg { background-color: var(--accent); }
.accent-text { color: var(--accent); }
.accent-soft-bg { background-color: var(--accent-soft); }

/* Base */
html { -webkit-text-size-adjust: 100%; }
body { font-family: 'Inter', system-ui, sans-serif; text-rendering: optimizeLegibility; }
::selection { background: var(--accent-soft); }
.tnum { font-variant-numeric: tabular-nums; }

/* Foco visible accesible (teclado) */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 6px; }

/* Scrollbar sutil */
* { scrollbar-width: thin; scrollbar-color: #cbd5e1 transparent; }
.dark * { scrollbar-color: #475569 transparent; }
*::-webkit-scrollbar { width: 8px; height: 8px; }
*::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 8px; }
.dark *::-webkit-scrollbar-thumb { background: #475569; }

/* Componentes (para usar en fases 2-4 sin tocar lógica) */
.btn-primary { display: inline-flex; align-items: center; justify-content: center; gap: .5rem; background: var(--accent); color: #fff; font-weight: 700; padding: .8rem 1.5rem; border-radius: 1rem; transition: filter .15s ease, transform .1s ease; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-primary:active { transform: scale(.98); }
.btn-ghost { display: inline-flex; align-items: center; justify-content: center; gap: .5rem; font-weight: 600; padding: .8rem 1.5rem; border-radius: 1rem; color: #64748b; transition: background .15s ease; }
.btn-ghost:hover { background: rgba(100, 116, 139, .12); }
.btn-danger { display: inline-flex; align-items: center; justify-content: center; gap: .5rem; background: var(--danger); color: #fff; font-weight: 700; padding: .8rem 1.5rem; border-radius: 1rem; }
.input { width: 100%; padding: .8rem 1rem; border-radius: .9rem; border: 1px solid #e2e8f0; background: #f8fafc; transition: border-color .15s ease, box-shadow .15s ease; }
.input:focus { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); outline: none; }
.dark .input { background: #1e293b; border-color: #334155; color: #f1f5f9; }
.card { background: #fff; border: 1px solid #f1f5f9; border-radius: 1.5rem; box-shadow: 0 1px 2px rgba(15, 23, 42, .05); }
.dark .card { background: #1e293b; border-color: #334155; }
.empty-state { text-align: center; padding: 2.5rem 1rem; color: #94a3b8; }
.skeleton { position: relative; overflow: hidden; background: #e2e8f0; border-radius: .75rem; min-height: 1rem; }
.dark .skeleton { background: #334155; }
.skeleton::after { content: ''; position: absolute; inset: 0; background: linear-gradient(90deg, transparent, rgba(255,255,255,.5), transparent); animation: shimmer 1.4s infinite; }
@keyframes shimmer { from { transform: translateX(-100%); } to { transform: translateX(100%); } }

/* Tablas → tarjetas en móvil (usar data-label en cada td) */
@media (max-width: 767px) {
    table.responsive-cards thead { display: none; }
    table.responsive-cards, table.responsive-cards tbody, table.responsive-cards tr, table.responsive-cards td { display: block; width: 100%; }
    table.responsive-cards tr { border: 1px solid #e2e8f0; border-radius: 1rem; margin-bottom: .75rem; padding: .5rem .75rem; background: #fff; }
    .dark table.responsive-cards tr { background: #1e293b; border-color: #334155; }
    table.responsive-cards td { border: 0; padding: .3rem 0; display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
    table.responsive-cards td::before { content: attr(data-label); font-size: .68rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: #94a3b8; }
    table.responsive-cards td.no-label::before { content: none; }
    table.responsive-cards td.no-label { justify-content: center; }
}

/* Relieve en modo claro (el oscuro ya tiene profundidad por contraste) */
.glass-effect { box-shadow: 0 10px 30px rgba(15, 23, 42, .10); }
.card { box-shadow: 0 12px 28px rgba(15, 23, 42, .08); }
.dark .card { box-shadow: none; }

/* Movimiento reducido */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}