/* ===== PALETA DE COLORES UNAM-IER ===== */
:root {
    --azul-unam: #003B6F;
    --azul-unam-claro: #1E5A9C;
    --azul-unam-muy-claro: #E3F2FD;
    --oro-unam: #FFB81C;
    --oro-unam-claro: #FFE082;
    --verde-ier: #2E7D32;
    --verde-ier-claro: #81C784;
    --verde-ier-muy-claro: #E8F5E9;
    --gris-fondo: #F5F7FA;
    --blanco: #FFFFFF;
    --texto-oscuro: #212121;
    --texto-gris: #757575;
    --borde: #E0E0E0;
    --rojo-error: #C62828;
    --rojo-error-claro: #FFEBEE;
    --verde-exito: #2E7D32;
    --verde-exito-claro: #E8F5E9;
}

/* ===== ESTILOS GENERALES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--gris-fondo);
    color: var(--texto-oscuro);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* ===== HEADER ESTILO UNAM ===== */
.header-unam {
    background: linear-gradient(135deg, var(--azul-unam) 0%, var(--azul-unam-claro) 100%);
    color: var(--blanco);
    border-radius: 15px 15px 0 0;
    padding: 30px;
    margin-bottom: 25px;
    box-shadow: 0 4px 12px rgba(0, 59, 111, 0.3);
    position: relative;
    overflow: hidden;
}

.header-unam::before {
    content: "UNAM • IER";
    position: absolute;
    bottom: 10px;
    right: 20px;
    font-size: 12px;
    opacity: 0.5;
    color: var(--blanco);
}

.header-unam h1 {
    font-size: 2.2rem;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.header-unam h1 i {
    color: var(--oro-unam);
}

.header-unam p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* ===== NAVEGACIÓN ===== */
.nav-admin {
    background: var(--blanco);
    border-radius: 12px;
    padding: 15px 25px;
    margin-bottom: 30px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--borde);
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: space-between;
    align-items: center;
}

.nav-links {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.nav-link {
    background: var(--azul-unam-muy-claro);
    color: var(--azul-unam);
    padding: 10px 20px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.nav-link:hover {
    background: var(--azul-unam);
    color: var(--blanco);
}

.nav-link i {
    color: var(--oro-unam);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-name {
    color: var(--azul-unam);
    font-weight: 600;
}

.btn-cerrar {
    background: var(--rojo-error);
    color: var(--blanco);
    padding: 8px 15px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.3s;
}

.btn-cerrar:hover {
    background: #B71C1C;
}

/* ===== FORMULARIOS ===== */
.form-card {
    background: var(--blanco);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--borde);
    margin-bottom: 30px;
}

.form-title {
    color: var(--azul-unam);
    border-bottom: 4px solid var(--oro-unam);
    padding-bottom: 10px;
    margin-bottom: 25px;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.form-group-full {
    grid-column: span 2;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--azul-unam);
    font-weight: 600;
    font-size: 0.9rem;
}

.form-group label i {
    margin-right: 8px;
    color: var(--oro-unam);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--borde);
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--azul-unam);
    box-shadow: 0 0 0 3px rgba(0, 59, 111, 0.1);
}

.form-group input:hover,
.form-group select:hover {
    border-color: var(--azul-unam-claro);
}

.btn-submit {
    background: var(--verde-ier);
    color: var(--blanco);
    border: none;
    padding: 12px 30px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
}

.btn-submit:hover {
    background: #1B5E20;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(46, 125, 50, 0.3);
}

.btn-cancel {
    background: var(--texto-gris);
    color: var(--blanco);
    border: none;
    padding: 12px 30px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.btn-cancel:hover {
    background: #5D6D7E;
}

.btn-edit {
    background: var(--oro-unam);
    color: var(--texto-oscuro);
    border: none;
    padding: 8px 15px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.btn-edit:hover {
    background: #F5A623;
}

.btn-delete {
    background: var(--rojo-error);
    color: var(--blanco);
    border: none;
    padding: 8px 15px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.btn-delete:hover {
    background: #B71C1C;
}

.btn-add {
    background: var(--azul-unam);
    color: var(--blanco);
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-add:hover {
    background: var(--azul-unam-claro);
}

/* ===== MENSAJES ===== */
.mensaje-error {
    background-color: var(--rojo-error-claro);
    border-left: 4px solid var(--rojo-error);
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 8px;
    color: var(--rojo-error);
}

.mensaje-exito {
    background-color: var(--verde-exito-claro);
    border-left: 4px solid var(--verde-exito);
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 8px;
    color: var(--verde-exito);
}

.mensaje-info {
    background-color: var(--azul-unam-muy-claro);
    border-left: 4px solid var(--azul-unam);
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 8px;
    color: var(--azul-unam);
}

/* ===== TABLA DE DATOS ===== */
.tabla-section {
    background: var(--blanco);
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--borde);
    margin-bottom: 30px;
}

.tabla-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 15px;
}

.tabla-header h2 {
    color: var(--azul-unam);
    display: flex;
    align-items: center;
    gap: 10px;
}

.tabla-responsive {
    overflow-x: auto;
    border-radius: 10px;
    border: 1px solid var(--borde);
}

.tabla-datos {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.tabla-datos th {
    background: var(--azul-unam);
    color: var(--blanco);
    padding: 12px 10px;
    font-weight: 600;
    white-space: nowrap;
}

.tabla-datos th i {
    margin-right: 5px;
    color: var(--oro-unam);
}

.tabla-datos td {
    padding: 10px;
    border: 1px solid var(--borde);
    white-space: nowrap;
}

.tabla-datos tbody tr:hover {
    background: var(--verde-ier-muy-claro);
}

.tabla-datos .acciones {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* ===== BÚSQUEDA/FILTROS ===== */
.filtros-bar {
    background: var(--blanco);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--borde);
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: flex-end;
}

.filtro-grupo {
    flex: 1;
    min-width: 200px;
}

.filtro-grupo label {
    display: block;
    margin-bottom: 8px;
    color: var(--azul-unam);
    font-weight: 600;
    font-size: 0.9rem;
}

.filtro-select,
.filtro-input {
    width: 100%;
    padding: 10px 12px;
    border: 2px solid var(--borde);
    border-radius: 8px;
    font-size: 0.9rem;
    transition: all 0.3s;
}

.btn-aplicar {
    background: var(--azul-unam);
    color: var(--blanco);
    border: none;
    padding: 10px 25px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    height: 42px;
}

.btn-aplicar:hover {
    background: var(--azul-unam-claro);
}

/* ===== FOOTER ===== */
.footer-unam {
    background: linear-gradient(135deg, var(--azul-unam) 0%, var(--azul-unam-claro) 100%);
    color: var(--blanco);
    border-radius: 0 0 15px 15px;
    padding: 25px;
    margin-top: 30px;
    text-align: center;
    font-size: 0.9rem;
}

.footer-unam i {
    color: var(--oro-unam);
    margin: 0 5px;
}

/* ===== RESPONSIVO ===== */
@media (max-width: 768px) {
    .header-unam h1 {
        font-size: 1.5rem;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .form-group-full {
        grid-column: span 1;
    }
    
    .filtros-bar {
        flex-direction: column;
    }
    
    .btn-aplicar {
        width: 100%;
        justify-content: center;
    }
    
    .nav-admin {
        flex-direction: column;
        align-items: stretch;
    }
    
    .nav-links {
        justify-content: center;
    }
    
    .user-info {
        justify-content: center;
    }
}