/* ============================================================
   FUENTES Y RESET
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Inter:opsz,wght@14..32,300;14..32,400;14..32,600;14..32,700;14..32,800&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* === DÍA === */
    --bg-body: #f4f6fb;
    --bg-surface: #ffffff;
    --bg-card: #ffffff;
    --bg-header: #0f172a;
    --bg-input: #f8fafc;
    --bg-hover: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-inverse: #ffffff;
    --border: #e2e8f0;
    --border-focus: #3b82f6;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.06), 0 1px 4px rgba(0, 0, 0, 0.04);
    --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.10);
    --radius: 16px;
    --radius-sm: 8px;
    --transition: 0.25s ease;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-light: #dbeafe;
    --success: #16a34a;
    --danger: #dc2626;
    --warning: #f59e0b;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

[data-theme="dark"] {
    /* === NOCHE === */
    --bg-body: #0a0e17;
    --bg-surface: #111827;
    --bg-card: #1e293b;
    --bg-header: #020617;
    --bg-input: #1e293b;
    --bg-hover: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8; /* Gris más claro para legibilidad óptima de descripciones */
    --text-inverse: #ffffff; /* Blanco para contrastar correctamente contra el header oscuro */
    --border: #334155;
    --border-focus: #3b82f6;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.6);
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --accent-light: #1e293b;
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
}

/* ============================================================
   BASE
   ============================================================ */
html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    background: var(--bg-body);
    color: var(--text-primary);
    transition: background var(--transition), color var(--transition);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ============================================================
   SCROLLBAR
   ============================================================ */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-body);
}
::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 99px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* ============================================================
   HEADER
   ============================================================ */
.header {
    background: var(--bg-header);
    padding: 16px 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.header .logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header .logo .icono {
    font-size: 1.8rem;
    line-height: 1;
}

.header .logo h1 {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-inverse);
    letter-spacing: -0.5px;
}

.header .logo small {
    font-size: 0.7rem;
    font-weight: 400;
    color: var(--text-muted);
    display: block;
    margin-top: -2px;
    letter-spacing: 0.3px;
}

.header .acciones {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.header .usuario-info {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 400;
    padding: 6px 14px;
    background: rgba(255,255,255,0.06);
    border-radius: 99px;
    border: 1px solid rgba(255,255,255,0.06);
}

.header .usuario-info strong {
    color: var(--text-inverse);
    font-weight: 600;
}

.btn-modo {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.08);
    color: var(--text-inverse);
    padding: 8px 18px;
    border-radius: 99px;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font);
}

.btn-modo:hover {
    background: rgba(255,255,255,0.12);
    border-color: rgba(255,255,255,0.2);
    transform: scale(1.02);
}

.btn-logout {
    background: rgba(239, 68, 68, 0.15);
    color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.2);
    padding: 8px 18px;
    border-radius: 99px;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all var(--transition);
    font-family: var(--font);
}

.btn-logout:hover {
    background: rgba(239, 68, 68, 0.25);
    border-color: rgba(239, 68, 68, 0.4);
    transform: scale(1.02);
}

/* ============================================================
   CONTAINER
   ============================================================ */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 32px 24px;
    flex: 1;
    width: 100%;
}

/* ============================================================
   CARDS
   ============================================================ */
.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 28px 32px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: all var(--transition);
    margin-bottom: 24px;
}

.card:hover {
    box-shadow: var(--shadow-hover);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
}

.card-header h2 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.3px;
}

.card-header h2 i {
    margin-right: 10px;
    color: var(--accent);
}

.card-header .badge {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 4px 14px;
    border-radius: 99px;
    background: var(--accent-light);
    color: var(--accent);
    border: 1px solid var(--border);
}

/* ============================================================
   GRID
   ============================================================ */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.grid-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 24px;
}

.grid-4 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: 24px;
}

/* ============================================================
   ESTADÍSTICAS (cards chicas)
   ============================================================ */
.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 20px 24px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: all var(--transition);
}

.stat-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.stat-card .numero {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -1px;
    line-height: 1.2;
}

.stat-card .label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-card .icono {
    font-size: 1.8rem;
    opacity: 0.6;
}

/* ============================================================
   FORMULARIOS
   ============================================================ */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-group label .required {
    color: var(--danger);
    margin-left: 4px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    max-width: 480px;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: var(--font);
    transition: all var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--border-focus);
    outline: none;
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.12);
    background: var(--bg-surface);
}

.form-group .help-text {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 6px;
}

/* ============================================================
   BOTONES
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    font-family: var(--font);
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    justify-content: center;
}

.btn-primary {
    background: var(--accent);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.3);
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-success:hover {
    background: #15803d;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(22, 163, 74, 0.3);
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    background: #b91c1c;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(220, 38, 38, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border);
}

.btn-outline:hover {
    background: var(--bg-hover);
    border-color: var(--text-secondary);
}

.btn-sm {
    padding: 8px 18px;
    font-size: 0.8rem;
}

.btn-lg {
    padding: 16px 40px;
    font-size: 1.05rem;
}

/* ============================================================
   TABLAS
   ============================================================ */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

thead {
    background: var(--bg-body);
}

th {
    text-align: left;
    padding: 14px 18px;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--border);
}

td {
    padding: 14px 18px;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
}

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

tr:hover td {
    background: var(--bg-hover);
}

/* ============================================================
   BADGES / ETIQUETAS
   ============================================================ */
.tag {
    display: inline-block;
    padding: 2px 14px;
    border-radius: 99px;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.tag-success {
    background: #dcfce7;
    color: #166534;
}

[data-theme="dark"] .tag-success {
    background: #14532d;
    color: #86efac;
}

.tag-danger {
    background: #fee2e2;
    color: #991b1b;
}

[data-theme="dark"] .tag-danger {
    background: #7f1d1d;
    color: #fca5a5;
}

.tag-warning {
    background: #fef3c7;
    color: #92400e;
}

[data-theme="dark"] .tag-warning {
    background: #78350f;
    color: #fcd34d;
}

.tag-info {
    background: #dbeafe;
    color: #1e40af;
}

[data-theme="dark"] .tag-info {
    background: #1e3a5f;
    color: #93c5fd;
}

/* ============================================================
   MENSAJES
   ============================================================ */
.mensaje {
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 24px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 12px;
    border-left: 4px solid;
}

.mensaje.success {
    background: #dcfce7;
    color: #166534;
    border-color: var(--success);
}

[data-theme="dark"] .mensaje.success {
    background: #14532d;
    color: #86efac;
}

.mensaje.error {
    background: #fee2e2;
    color: #991b1b;
    border-color: var(--danger);
}

[data-theme="dark"] .mensaje.error {
    background: #7f1d1d;
    color: #fca5a5;
}

.mensaje.warning {
    background: #fef3c7;
    color: #92400e;
    border-color: var(--warning);
}

[data-theme="dark"] .mensaje.warning {
    background: #78350f;
    color: #fcd34d;
}

.mensaje.info {
    background: #dbeafe;
    color: #1e40af;
    border-color: var(--accent);
}

[data-theme="dark"] .mensaje.info {
    background: #1e3a5f;
    color: #93c5fd;
}

/* ============================================================
   LOGIN / REGISTRO (páginas específicas)
   ============================================================ */
.auth-container {
    max-width: 460px;
    margin: 40px auto;
    padding: 0 20px;
}

.auth-container .card {
    padding: 40px 36px;
}

.auth-container .card h1 {
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 4px;
}

.auth-container .card .subtitulo {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 28px;
}

.auth-container .form-group input,
.auth-container .form-group select {
    max-width: 100%;
}

.auth-container .btn {
    width: 100%;
    justify-content: center;
}

.auth-container .auth-link {
    text-align: center;
    margin-top: 20px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.auth-container .auth-link a {
    font-weight: 600;
}

.auth-container .terminos {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.85rem;
}

.auth-container .terminos input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-top: 3px;
    flex-shrink: 0;
    accent-color: var(--accent);
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
    background: var(--bg-header);
    color: var(--text-muted);
    text-align: center;
    padding: 18px 24px;
    font-size: 0.75rem;
    border-top: 1px solid var(--border);
    margin-top: auto;
}

.footer a {
    color: var(--text-inverse);
}

.footer a:hover {
    color: var(--accent);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
    .grid-4 {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }

    .header {
        padding: 14px 20px;
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }

    .header .acciones {
        justify-content: center;
    }

    .container {
        padding: 20px 16px;
    }

    .card {
        padding: 20px;
    }

    .auth-container .card {
        padding: 28px 20px;
    }

    .stat-card .numero {
        font-size: 1.6rem;
    }

    table {
        font-size: 0.8rem;
    }

    th, td {
        padding: 10px 12px;
    }
}

@media (max-width: 480px) {
    .header .logo h1 {
        font-size: 1rem;
    }

    .btn-modo, .btn-logout {
        font-size: 0.7rem;
        padding: 6px 14px;
    }

    .card-header {
        flex-direction: column;
        align-items: flex-start;
    }
}