/* ==========================================================================
   ACATUDY DESIGN SYSTEM
   --------------------------------------------------------------------------
   Sistema de diseño propio de Acatudy. Sin framework CSS ni build step:
   tokens (--u-*) + componentes (u-*) servidos tal cual desde public/css.

   - El COLOR DE MARCA lo fija el tenant via --brand-primary / --brand-*
     (BrandingService); aquí solo hay fallbacks neutros.
   - MODO OSCURO elegante por defecto. Modo claro con
     <html data-u-theme="light"> o prefers-color-scheme en <html data-u-theme="auto">.
   - Tipografía: stack de sistema (sin fuentes externas).
   ========================================================================== */

:root {
    /* Superficies (oscuro por defecto) */
    --u-bg: #0b1120;
    --u-surface: #111a2e;
    --u-surface-2: #1a2540;
    --u-line: #24314f;

    /* Texto */
    --u-text: #e6ebf5;
    --u-text-dim: #93a0b8;

    /* Marca (el tenant la pisa con --brand-primary) */
    --u-primary: var(--brand-primary, #38bdf8);
    --u-primary-strong: var(--brand-primary-dark, #0ea5e9);
    --u-primary-soft: rgba(56, 189, 248, 0.14);
    --u-on-primary: #06121f;

    /* Estado */
    --u-success: #34d399;
    --u-danger: #f87171;
    --u-warning: #fbbf24;
    --u-info: #60a5fa;

    /* Radios */
    --u-radius-sm: 8px;
    --u-radius: 12px;
    --u-radius-lg: 18px;

    /* Sombras */
    --u-shadow-sm: 0 1px 3px rgba(2, 6, 23, 0.4);
    --u-shadow: 0 10px 30px rgba(2, 6, 23, 0.45);
    --u-shadow-lg: 0 24px 60px rgba(2, 6, 23, 0.55);

    /* Tipografía (stack de sistema, cero dependencias) */
    --u-font-display: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --u-font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --u-font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

    /* Espaciado */
    --u-space-1: 4px;
    --u-space-2: 8px;
    --u-space-3: 12px;
    --u-space-4: 16px;
    --u-space-5: 24px;
    --u-space-6: 32px;
    --u-space-7: 48px;
    --u-space-8: 64px;

    /* Métricas de layout */
    --u-topbar-h: 60px;
    --u-sidebar-w: 250px;
    --u-container: 1120px;
}

/* Modo claro explícito */
html[data-u-theme="light"] {
    --u-bg: #f4f6fb;
    --u-surface: #ffffff;
    --u-surface-2: #eef1f7;
    --u-line: #dbe1ec;
    --u-text: #17202f;
    --u-text-dim: #5a6878;
    --u-primary-soft: rgba(14, 165, 233, 0.12);
    --u-on-primary: #ffffff;
    --u-shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
    --u-shadow: 0 10px 24px rgba(15, 23, 42, 0.10);
    --u-shadow-lg: 0 24px 48px rgba(15, 23, 42, 0.14);
}

/* Modo claro automático */
@media (prefers-color-scheme: light) {
    html[data-u-theme="auto"] {
        --u-bg: #f4f6fb;
        --u-surface: #ffffff;
        --u-surface-2: #eef1f7;
        --u-line: #dbe1ec;
        --u-text: #17202f;
        --u-text-dim: #5a6878;
        --u-primary-soft: rgba(14, 165, 233, 0.12);
        --u-on-primary: #ffffff;
        --u-shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
        --u-shadow: 0 10px 24px rgba(15, 23, 42, 0.10);
        --u-shadow-lg: 0 24px 48px rgba(15, 23, 42, 0.14);
    }
}

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

.u-body {
    margin: 0;
    background: var(--u-bg);
    color: var(--u-text);
    font-family: var(--u-font-body);
    font-size: 15px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

.u-body h1, .u-body h2, .u-body h3, .u-body h4 {
    font-family: var(--u-font-display);
    letter-spacing: -0.01em;
    line-height: 1.25;
    margin: 0 0 var(--u-space-3);
}

.u-body a { color: var(--u-primary); text-decoration: none; }
.u-body a:hover { text-decoration: underline; }
.u-body img { max-width: 100%; }

.u-container { max-width: var(--u-container); margin: 0 auto; padding: 0 var(--u-space-5); }
.u-container-sm { max-width: 460px; margin: 0 auto; padding: 0 var(--u-space-5); }

.u-text-dim { color: var(--u-text-dim); }
.u-text-center { text-align: center; }
.u-mt-4 { margin-top: var(--u-space-4); }
.u-mt-5 { margin-top: var(--u-space-5); }
.u-mt-6 { margin-top: var(--u-space-6); }
.u-mb-4 { margin-bottom: var(--u-space-4); }
.u-mb-5 { margin-bottom: var(--u-space-5); }

/* Grid de tarjetas responsiva */
.u-grid { display: grid; gap: var(--u-space-5); }
.u-grid-2 { grid-template-columns: 1fr; }
.u-grid-3 { grid-template-columns: 1fr; }
.u-grid-4 { grid-template-columns: 1fr; }
@media (min-width: 720px) {
    .u-grid-2 { grid-template-columns: repeat(2, 1fr); }
    .u-grid-3 { grid-template-columns: repeat(3, 1fr); }
    .u-grid-4 { grid-template-columns: repeat(4, 1fr); }
}

.u-flex { display: flex; align-items: center; gap: var(--u-space-3); }
.u-flex-between { display: flex; align-items: center; justify-content: space-between; gap: var(--u-space-3); }
.u-flex-wrap { flex-wrap: wrap; }

/* --------------------------------------------------------------------------
   Botones
   -------------------------------------------------------------------------- */
.u-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--u-space-2);
    padding: 10px 20px;
    border-radius: var(--u-radius);
    border: 1px solid transparent;
    background: var(--u-surface-2);
    color: var(--u-text);
    font-family: var(--u-font-body);
    font-size: 14px;
    font-weight: 600;
    line-height: 1.3;
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.u-btn:hover { text-decoration: none; transform: translateY(-1px); box-shadow: var(--u-shadow-sm); }
.u-btn:active { transform: translateY(0); }

.u-btn-primary { background: var(--u-primary); color: var(--u-on-primary); }
.u-btn-primary:hover { background: var(--u-primary-strong); color: var(--u-on-primary); }

.u-btn-outline { background: transparent; border-color: var(--u-line); color: var(--u-text); }
.u-btn-outline:hover { border-color: var(--u-text-dim); }

.u-btn-ghost { background: transparent; color: var(--u-text-dim); }
.u-btn-ghost:hover { color: var(--u-text); box-shadow: none; }

.u-btn-danger { background: var(--u-danger); color: #1a0505; }

.u-btn-sm { padding: 6px 14px; font-size: 13px; border-radius: var(--u-radius-sm); }
.u-btn-lg { padding: 14px 28px; font-size: 16px; }
.u-btn-block { width: 100%; }

/* --------------------------------------------------------------------------
   Tarjetas
   -------------------------------------------------------------------------- */
.u-card {
    background: var(--u-surface);
    border: 1px solid var(--u-line);
    border-radius: var(--u-radius-lg);
    padding: var(--u-space-5);
    box-shadow: var(--u-shadow-sm);
}
.u-card-hover { transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease; }
.u-card-hover:hover { transform: translateY(-2px); box-shadow: var(--u-shadow); border-color: var(--u-primary); }
.u-card-highlight { border-color: var(--u-primary); box-shadow: 0 0 0 1px var(--u-primary), var(--u-shadow); }

/* --------------------------------------------------------------------------
   Formularios
   -------------------------------------------------------------------------- */
.u-field { margin-bottom: var(--u-space-4); }
.u-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--u-text-dim);
    margin-bottom: var(--u-space-2);
}

.u-input, .u-select, .u-textarea {
    width: 100%;
    background: var(--u-bg);
    border: 1px solid var(--u-line);
    border-radius: var(--u-radius);
    padding: 11px 14px;
    color: var(--u-text);
    font-family: var(--u-font-body);
    font-size: 14px;
    outline: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.u-input::placeholder, .u-textarea::placeholder { color: var(--u-text-dim); opacity: 0.7; }
.u-input:focus, .u-select:focus, .u-textarea:focus {
    border-color: var(--u-primary);
    box-shadow: 0 0 0 3px var(--u-primary-soft);
}

.u-input-group { display: flex; align-items: stretch; }
.u-input-group .u-input { border-top-right-radius: 0; border-bottom-right-radius: 0; }
.u-input-addon {
    display: inline-flex;
    align-items: center;
    padding: 0 14px;
    background: var(--u-surface-2);
    border: 1px solid var(--u-line);
    border-left: 0;
    border-top-right-radius: var(--u-radius);
    border-bottom-right-radius: var(--u-radius);
    color: var(--u-text-dim);
    font-size: 13px;
    white-space: nowrap;
}

.u-check { display: flex; align-items: center; gap: var(--u-space-2); font-size: 14px; color: var(--u-text-dim); }
.u-check input { accent-color: var(--u-primary); width: 16px; height: 16px; }

.u-error { color: var(--u-danger); font-size: 12px; margin-top: var(--u-space-1); }

/* --------------------------------------------------------------------------
   Alertas y badges
   -------------------------------------------------------------------------- */
.u-alert {
    border-radius: var(--u-radius);
    padding: var(--u-space-3) var(--u-space-4);
    font-size: 14px;
    border: 1px solid transparent;
    margin-bottom: var(--u-space-4);
}
.u-alert ul { margin: 0; padding-left: 18px; }
.u-alert-success { background: rgba(52, 211, 153, 0.12); border-color: rgba(52, 211, 153, 0.35); color: var(--u-success); }
.u-alert-danger { background: rgba(248, 113, 113, 0.12); border-color: rgba(248, 113, 113, 0.35); color: var(--u-danger); }
.u-alert-info { background: rgba(96, 165, 250, 0.12); border-color: rgba(96, 165, 250, 0.35); color: var(--u-info); }
.u-alert-warning { background: rgba(251, 191, 36, 0.12); border-color: rgba(251, 191, 36, 0.35); color: var(--u-warning); }

.u-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    background: var(--u-surface-2);
    color: var(--u-text-dim);
    border: 1px solid var(--u-line);
}
.u-badge-primary { background: var(--u-primary-soft); color: var(--u-primary); border-color: transparent; }
.u-badge-success { background: rgba(52, 211, 153, 0.15); color: var(--u-success); border-color: transparent; }
.u-badge-danger { background: rgba(248, 113, 113, 0.15); color: var(--u-danger); border-color: transparent; }
.u-badge-warning { background: rgba(251, 191, 36, 0.15); color: var(--u-warning); border-color: transparent; }

/* --------------------------------------------------------------------------
   Tablas
   -------------------------------------------------------------------------- */
.u-table-wrap { overflow-x: auto; border: 1px solid var(--u-line); border-radius: var(--u-radius-lg); background: var(--u-surface); }
.u-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.u-table th {
    text-align: left;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--u-text-dim);
    padding: var(--u-space-3) var(--u-space-4);
    border-bottom: 1px solid var(--u-line);
    background: var(--u-surface-2);
}
.u-table td { padding: var(--u-space-3) var(--u-space-4); border-bottom: 1px solid var(--u-line); }
.u-table tr:last-child td { border-bottom: 0; }
.u-table tbody tr:hover { background: var(--u-surface-2); }

/* --------------------------------------------------------------------------
   Topbar / navegación
   -------------------------------------------------------------------------- */
.u-topbar {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--u-topbar-h);
    display: flex;
    align-items: center;
    gap: var(--u-space-5);
    padding: 0 var(--u-space-5);
    background: var(--u-bg);
    background: color-mix(in srgb, var(--u-bg) 82%, transparent);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--u-line);
}
.u-topbar-brand {
    display: flex;
    align-items: center;
    gap: var(--u-space-3);
    font-family: var(--u-font-display);
    font-size: 18px;
    font-weight: 800;
    color: var(--u-text);
    letter-spacing: -0.01em;
}
.u-topbar-brand:hover { text-decoration: none; }
.u-topbar-brand img { max-height: 34px; width: auto; }
.u-topbar-spacer { flex: 1; }

.u-nav { display: flex; align-items: center; gap: var(--u-space-1); }
.u-nav-link {
    padding: 8px 14px;
    border-radius: var(--u-radius-sm);
    color: var(--u-text-dim);
    font-size: 14px;
    font-weight: 600;
    transition: color 0.15s ease, background 0.15s ease;
}
.u-nav-link:hover { color: var(--u-text); background: var(--u-surface-2); text-decoration: none; }
.u-nav-link.active { color: var(--u-primary); background: var(--u-primary-soft); }

/* --------------------------------------------------------------------------
   Sidebar (admin)
   -------------------------------------------------------------------------- */
.u-layout { display: flex; min-height: 100vh; }
.u-sidebar {
    width: var(--u-sidebar-w);
    flex-shrink: 0;
    background: var(--u-surface);
    border-right: 1px solid var(--u-line);
    padding: var(--u-space-5) var(--u-space-4);
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}
.u-sidebar-brand {
    display: flex;
    align-items: center;
    gap: var(--u-space-3);
    font-weight: 800;
    font-size: 17px;
    color: var(--u-text);
    margin-bottom: var(--u-space-6);
    padding: 0 var(--u-space-2);
}
.u-sidebar-brand:hover { text-decoration: none; }
.u-sidebar-brand img { max-height: 30px; width: auto; }
.u-sidebar-label {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--u-text-dim);
    margin: var(--u-space-5) var(--u-space-2) var(--u-space-2);
}
.u-sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--u-space-3);
    padding: 9px 12px;
    border-radius: var(--u-radius-sm);
    color: var(--u-text-dim);
    font-size: 14px;
    font-weight: 500;
}
.u-sidebar-link:hover { color: var(--u-text); background: var(--u-surface-2); text-decoration: none; }
.u-sidebar-link.active { color: var(--u-primary); background: var(--u-primary-soft); font-weight: 600; }
.u-sidebar-link svg, .u-sidebar-link i { width: 16px; height: 16px; flex-shrink: 0; }

.u-main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.u-content { flex: 1; padding: var(--u-space-6); }

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.u-footer {
    border-top: 1px solid var(--u-line);
    padding: var(--u-space-6) var(--u-space-5);
    color: var(--u-text-dim);
    font-size: 13px;
}
.u-footer a { color: var(--u-text-dim); }
.u-footer a:hover { color: var(--u-text); }
.u-footer-inner {
    max-width: var(--u-container);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--u-space-4);
    flex-wrap: wrap;
}
.u-footer-links { display: flex; gap: var(--u-space-5); }

/* --------------------------------------------------------------------------
   Auth (guest)
   -------------------------------------------------------------------------- */
.u-auth {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--u-space-6) var(--u-space-4);
    position: relative;
    overflow: hidden;
}
.u-auth::before {
    content: '';
    position: absolute;
    width: 60vw;
    height: 60vw;
    top: -30vw;
    background: radial-gradient(circle, var(--u-primary-soft) 0%, transparent 60%);
    filter: blur(60px);
    pointer-events: none;
}
.u-auth-panel {
    position: relative;
    width: 100%;
    max-width: 420px;
    background: var(--u-surface);
    border: 1px solid var(--u-line);
    border-radius: var(--u-radius-lg);
    padding: var(--u-space-6);
    box-shadow: var(--u-shadow-lg);
}
.u-auth-brand {
    text-align: center;
    font-family: var(--u-font-display);
    font-weight: 800;
    font-size: 20px;
    margin-bottom: var(--u-space-2);
}
.u-auth-brand img { max-height: 44px; margin-bottom: var(--u-space-3); }
.u-auth-subtitle { text-align: center; color: var(--u-text-dim); font-size: 14px; margin-bottom: var(--u-space-6); }
.u-auth-footer { position: relative; margin-top: var(--u-space-6); color: var(--u-text-dim); font-size: 13px; display: flex; gap: var(--u-space-5); }
.u-auth-footer a { color: var(--u-text-dim); }

/* --------------------------------------------------------------------------
   Impersonation banner
   -------------------------------------------------------------------------- */
.u-banner-impersonation {
    background: var(--u-warning);
    color: #3a2a00;
    text-align: center;
    font-size: 14px;
    font-weight: 600;
    padding: var(--u-space-2) var(--u-space-4);
}
.u-banner-impersonation a, .u-banner-impersonation button { color: #3a2a00; font-weight: 700; text-decoration: underline; }

/* --------------------------------------------------------------------------
   Paginación (Paginator::useBootstrapFive genera este markup; aquí se
   estila con tokens Acatudy para no depender de Bootstrap CSS)
   -------------------------------------------------------------------------- */
.pagination { display: flex; gap: 4px; list-style: none; padding: 0; margin: 0; flex-wrap: wrap; }
.page-link {
    display: inline-block;
    padding: 7px 13px;
    border-radius: var(--u-radius-sm);
    border: 1px solid var(--u-line);
    background: var(--u-surface);
    color: var(--u-text-dim);
    font-size: 14px;
    text-decoration: none;
}
.page-link:hover { color: var(--u-text); border-color: var(--u-text-dim); }
.page-item.active .page-link { background: var(--u-primary); border-color: var(--u-primary); color: var(--u-on-primary); }
.page-item.disabled .page-link { opacity: 0.45; pointer-events: none; }

/* Utilidad: solo visible en pantallas pequeñas / grandes */
.u-only-mobile { display: none; }
@media (max-width: 900px) {
    .u-sidebar { display: none; }
    .u-only-mobile { display: block; }
}
