:root {
    /* Paleta Profesional para Adultos */
    --primary: #1e3a8a;       /* Azul Navy (Seriedad) */
    --primary-hover: #172554;
    --secondary: #64748b;     /* Gris Slate (Neutral) */
    --success: #059669;       /* Verde (Aprobaciones) */
    --danger: #dc2626;        /* Rojo (Alertas) */
    --bg-body: #f8fafc;       /* Fondo gris casi blanco (descanso visual) */
    --bg-card: #ffffff;
    --text-main: #0f172a;     /* Casi negro para lectura perfecta */
    --text-muted: #475569;
    
    /* Tamaños Estándar */
    --radius: 12px;
    --font-base: 16px;
}

body {
    background-color: var(--bg-body);
    color: var(--text-main);
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: var(--font-base);
}

/* --- CLASES PERSONALIZADAS --- */

/* Navegación */
.nav-glass {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.nav-link {
    position: relative;
    transition: all 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: #2563eb;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* --- COMPONENTES MAESTROS --- */

/* Botón Principal (Guardar, Crear) */
.btn-admin {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px; /* Tamaño equilibrado, no gigante */
    font-weight: 700;
    border-radius: var(--radius);
    transition: all 0.2s;
    cursor: pointer;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    gap: 8px;
}

.btn-primary-admin {
    background-color: var(--primary);
    color: white;
    border: none;
    box-shadow: 0 4px 6px -1px rgba(30, 58, 138, 0.2);
}

.btn-primary-admin:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

/* Estilo de Tablas para Adultos (Limpio y con aire) */
.table-admin {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.table-admin th {
    background-color: #f1f5f9;
    padding: 16px;
    text-transform: uppercase;
    font-size: 0.75rem;
    font-weight: 800;
    color: var(--secondary);
    border-bottom: 2px solid #e2e8f0;
}

.table-admin td {
    padding: 16px;
    border-bottom: 1px solid #f1f5f9;
    vertical-align: middle;
}

.table-admin tr:hover {
    background-color: #f8fafc;
}

/* Inputs de Formulario (Legibles) */
.form-control-admin {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.2s;
}

.form-control-admin:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 4px rgba(30, 58, 138, 0.1);
}

/* --- ANIMACIONES Y TRANSICIONES --- */

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

/* --- RESPONSIVE --- */

@media (max-width: 768px) {
    .btn-admin {
        padding: 12px 20px;
        font-size: 0.9rem;
    }
    
    .table-admin th,
    .table-admin td {
        padding: 12px 8px;
    }
}