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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f0f4f8;
    min-height: 100vh;
}

/* ========== NAVBAR ========== */
.navbar {
    background: linear-gradient(135deg, #003366, #1a4f8b);
    color: white;
    padding: 15px 0;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    flex-wrap: wrap;
}
/* ========== PERSONALIZACIÓN CON IMÁGENES ========== */

/* Logo en navbar */
.nav-logo {
    height: 40px;
    vertical-align: middle;
    margin-right: 10px;
    border-radius: 8px;
}

/* Fondo institucional */
body {
    background-image: url('/static/images/fondo-institucional.jpg');
    background-size: cover;
    background-attachment: fixed;
    background-position: center;
}

/* Contenedor semi-transparente */
.container {
    background: rgba(255, 255, 255, 0.92);
    border-radius: 16px;
    padding: 20px 20px 30px 20px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
}

/* Banner institucional */
.banner-institucional {
    position: relative;
    width: 100%;
    height: 200px;
    overflow: hidden;
    border-radius: 16px;
    margin-bottom: 25px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.banner-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.banner-texto {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px 30px;
    background: linear-gradient(transparent, rgba(0,0,0,0.7));
    color: white;
}

.banner-texto h2 {
    margin: 0;
    font-size: 1.8rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.banner-texto p {
    margin: 5px 0 0 0;
    font-size: 1rem;
    opacity: 0.9;
}

.banner-sub {
    font-weight: bold;
    color: #ffd700;
    font-size: 1.1rem !important;
}

/* Iconos de salas */
.sala-icono {
    width: 80px;
    height: 80px;
    margin: 0 auto 12px auto;
    border-radius: 50%;
    background: #f0f4f8;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 3px solid #3498db;
}

.sala-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.sala-icono-default {
    font-size: 2.5rem;
}

.capacidad-sala {
    font-weight: bold;
    color: #2c3e50 !important;
    margin-top: 8px;
    font-size: 0.85rem !important;
}

/* Logo en login */
.auth-logo img {
    display: block;
    margin: 0 auto 15px auto;
}

@media (max-width: 768px) {
    .banner-institucional {
        height: 150px;
    }
    .banner-texto h2 {
        font-size: 1.2rem;
    }
    .banner-texto p {
        font-size: 0.8rem;
    }
    .sala-icono {
        width: 60px;
        height: 60px;
    }
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: bold;
    letter-spacing: 1px;
}

.nav-brand span {
    color: #FFC300;
}

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

.nav-link {
    color: white;
    text-decoration: none;
    padding: 8px 15px;
    border-radius: 6px;
    transition: background 0.3s;
}

.nav-link:hover {
    background: rgba(255,195,0,0.25);
}

.nav-link.logout:hover {
    background: #c0392b;
}

.badge-admin {
    background: #FFC300;
    color: #003366;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: bold;
    text-transform: uppercase;
}

 .nav-logo {
    height: 40px;
    vertical-align: middle;
    margin-right: 10px;
    border-radius: 8px;
}

/* ========== TARJETAS DE SALAS (AZUL REY + TRANSPARENTE) ========== */
.salas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.sala-card {
    background: rgba(26, 35, 126, 0.85); /* Azul rey con transparencia */
    backdrop-filter: blur(8px); /* Efecto de vidrio esmerilado */
    -webkit-backdrop-filter: blur(8px);
    padding: 25px 20px;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(26, 35, 126, 0.3);
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid rgba(255, 255, 255, 0.15);
    position: relative;
    color: white;
}

.sala-card:hover {
    transform: translateY(-8px) scale(1.03);
    box-shadow: 0 12px 40px rgba(26, 35, 126, 0.5);
    background: rgba(26, 35, 126, 0.95);
    border-color: rgba(255, 215, 0, 0.5);
}

.sala-card h2 {
    color: #ffffff;
    margin-bottom: 8px;
    font-size: 1.5rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.sala-card p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.9rem;
    margin: 4px 0;
}

.capacidad-sala {
    font-weight: bold;
    color: #ffd700 !important;
    margin-top: 8px;
    font-size: 0.85rem !important;
    background: rgba(0,0,0,0.2);
    padding: 4px 12px;
    border-radius: 20px;
    display: inline-block;
}

/* Iconos de salas sobre fondo azul */
.sala-icono {
    width: 80px;
    height: 80px;
    margin: 0 auto 12px auto;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 3px solid rgba(255, 255, 255, 0.25);
    transition: all 0.3s ease;
}

.sala-card:hover .sala-icono {
    border-color: #ffd700;
    background: rgba(255, 255, 255, 0.25);
}

.sala-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.sala-icono-default {
    font-size: 2.5rem;
    color: white;
}

/* Badge para CC5 en tarjetas azules */
.sala-card .badge-admin {
    background: #ffd700;
    color: #1a237e;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: bold;
    text-transform: uppercase;
    display: inline-block;
    margin-top: 8px;
}

/* Efecto de brillo al pasar el mouse */
.sala-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
}

.sala-card:hover::before {
    opacity: 1;
}

/* Responsive */
@media (max-width: 768px) {
    .sala-icono {
        width: 60px;
        height: 60px;
    }
    .sala-card h2 {
        font-size: 1.2rem;
    }
}

/* ========== CONTENEDOR PRINCIPAL ========== */
.container {
    max-width: 1200px;
    margin: 20px auto;
    padding: 0 20px;
}

h1 {
    text-align: center;
    color: #003366;
    margin-bottom: 30px;
}

h1 span {
    color: #FFC300;
}

/* ========== ALERTAS ========== */
.alert {
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-weight: 500;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border-left: 4px solid #28a745;
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
    border-left: 4px solid #dc3545;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border-left: 4px solid #FFC300;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border-left: 4px solid #003366;
}

/* ========== TABS DE SALAS ========== */
.tabs-salas {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 20px 0;
    border-bottom: 2px solid #e0e0e0;
    padding-bottom: 10px;
}

.tab-sala {
    padding: 10px 20px;
    background: #f8f9fa;
    border: none;
    border-radius: 8px 8px 0 0;
    cursor: pointer;
    font-weight: 500;
    color: #555;
    transition: all 0.3s;
    font-size: 0.95rem;
}

.tab-sala:hover {
    background: #e3edf7;
    color: #003366;
}

.tab-sala.active {
    background: #003366;
    color: white;
    box-shadow: 0 -2px 8px rgba(0,51,102,0.3);
}

.tab-sala .badge-admin {
    font-size: 0.6rem;
    margin-left: 4px;
}

/* ========== FECHA SELECTOR ========== */
.fecha-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    justify-content: center;
    margin: 20px 0;
}

.fecha-selector input[type="date"] {
    padding: 10px 15px;
    border-radius: 8px;
    border: 2px solid #ddd;
    font-size: 1rem;
    background: white;
}

.fecha-selector input[type="date"]:focus {
    border-color: #003366;
    outline: none;
}

.fecha-selector button {
    padding: 10px 18px;
    border-radius: 8px;
    border: none;
    background: #003366;
    color: white;
    cursor: pointer;
    font-weight: bold;
    transition: background 0.3s;
}

.fecha-selector button:hover {
    background: #002244;
}

.fecha-selector button.btn-primary {
    background: #FFC300;
    color: #003366;
}

.fecha-selector button.btn-primary:hover {
    background: #e6b000;
}

/* ========== CALENDARIO ========== */
.calendario-container {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    overflow: hidden;
    margin: 20px 0;
}

.calendario-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 24px;
    background: #f8f9fa;
    border-bottom: 1px solid #e0e0e0;
    flex-wrap: wrap;
    gap: 10px;
}

.calendario-header h2 {
    margin: 0;
    color: #003366;
    font-size: 1.2rem;
}

.fecha-titulo {
    font-size: 1rem;
    color: #555;
    font-weight: 500;
}

.calendario-grid {
    display: flex;
    padding: 10px;
    gap: 4px;
    overflow-x: auto;
}

.grid-horas {
    min-width: 70px;
    flex-shrink: 0;
}

.hora-label {
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    color: #888;
    font-weight: 500;
    border-bottom: 1px solid #f0f0f0;
}

.hora-label.vacio {
    height: 40px;
    border-bottom: none;
}

.grid-bloques {
    flex: 1;
    min-width: 0;
}

.bloque {
    height: 50px;
    border-radius: 6px;
    margin-bottom: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 0.7rem;
    font-weight: 500;
    cursor: default;
    transition: all 0.2s;
    padding: 0 6px;
    text-align: center;
    border: 2px solid transparent;
}

.bloque-disponible {
    background: #e8f5e9;
    color: #2e7d32;
    cursor: pointer;
    border-color: #a5d6a7;
}

.bloque-disponible:hover {
    background: #c8e6c9;
    transform: scale(1.02);
    border-color: #66bb6a;
    box-shadow: 0 2px 8px rgba(46, 125, 50, 0.3);
}

.bloque-ocupado {
    background: #ffebee;
    color: #c62828;
    border-color: #ef9a9a;
}

.bloque-ocupado-mio {
    background: #fff3e0;
    color: #e65100;
    border-color: #FFC300;
    border-width: 3px;
}

.bloque-clase {
    background: #e3f2fd;
    color: #003366;
    border-color: #1a4f8b;
    border-width: 2px;
    cursor: default;
}

.bloque-clase .usuario-bloque {
    font-weight: bold;
}

.hora-bloque {
    font-size: 0.6rem;
    opacity: 0.7;
}

.usuario-bloque {
    font-size: 0.65rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 80px;
}

.disponible-texto {
    font-size: 0.65rem;
    font-weight: bold;
}
.mensaje-info {
    padding: 30px;
    text-align: center;
    color: #666;
    font-size: 1.1rem;
    background: #f8f9fa;
    border-radius: 8px;
}

/* ========== FORMULARIO DE RESERVA RÁPIDA ========== */
.form-reserva-rapida {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    margin: 20px 0;
    border-left: 6px solid #003366;
}

.form-reserva-rapida h3 {
    margin-top: 0;
    color: #003366;
}

.form-reserva-rapida .form-group {
    margin-bottom: 12px;
}

.form-reserva-rapida .form-group label {
    font-weight: 500;
    color: #555;
}

.form-reserva-rapida .btn-primary {
    margin-right: 10px;
}

.form-reserva-rapida .btn-cancelar {
    padding: 12px 25px;
    background: #e74c3c;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
    transition: background 0.3s;
}

.form-reserva-rapida .btn-cancelar:hover {
    background: #c0392b;
}

/* ========== PANEL DE ADMINISTRACIÓN ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 20px 0 30px 0;
}

.stat-card {
    background: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    text-align: center;
    border-top: 4px solid #003366;
}

.stat-card h3 {
    color: #7f8c8d;
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    color: #003366;
}

.admin-section {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    margin-top: 30px;
}

.admin-section h2 {
    color: #003366;
    margin-bottom: 20px;
}

.admin-section h2 span {
    color: #FFC300;
}

.admin-form {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    border-left: 4px solid #FFC300;
}

.admin-form h3 {
    margin-bottom: 12px;
    color: #003366;
}

.form-inline {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

.form-inline input {
    flex: 1;
    min-width: 150px;
    padding: 10px;
    border-radius: 6px;
    border: 1px solid #ddd;
}

.form-inline input:focus {
    border-color: #003366;
    outline: none;
}

/* ========== TABLAS ========== */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 15px 0;
}

table thead {
    background: #003366;
    color: white;
}

table thead th {
    color: white;
}

table th,
table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #ecf0f1;
}

table tbody tr:hover {
    background: #f0f6fe;
}

.badge-usuario {
    background: #003366;
    color: white;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
}

.badge-admin {
    background: #FFC300;
    color: #003366;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: bold;
}

.badge-activa {
    background: #27ae60;
    color: white;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
}

.badge-cancelada {
    background: #e74c3c;
    color: white;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
}

/* ========== AUTENTICACIÓN ========== */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #003366 0%, #1a4f8b 100%);
    padding: 20px;
}

.auth-box {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    max-width: 420px;
    width: 100%;
    border-top: 6px solid #FFC300;
}

.auth-box h1 {
    text-align: center;
    margin-bottom: 25px;
    color: #003366;
}

.auth-box h1 span {
    color: #FFC300;
}

.auth-box .form-group {
    margin-bottom: 15px;
}

.auth-box .form-group input {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    transition: border-color 0.3s;
}

.auth-box .form-group input:focus {
    border-color: #003366;
    outline: none;
}

.auth-box .btn-primary {
    width: 100%;
    padding: 14px;
    font-size: 1.1rem;
    margin-top: 10px;
}

.auth-link {
    text-align: center;
    margin-top: 20px;
    color: #7f8c8d;
}

.auth-link a {
    color: #003366;
    text-decoration: none;
    font-weight: 500;
}

.auth-link a:hover {
    color: #FFC300;
}

.demo-credentials {
    margin-top: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    font-size: 0.9rem;
    border-left: 4px solid #FFC300;
}

.demo-credentials p {
    margin: 3px 0;
}

/* ========== BOTONES ========== */
.btn-primary {
    background: #003366;
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary:hover {
    background: #002244;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,51,102,0.4);
}

.btn-cancelar {
    background: #e74c3c;
    color: white;
    border: none;
    padding: 6px 14px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: background 0.3s;
}

.btn-cancelar:hover {
    background: #c0392b;
}

.btn-danger {
    background: #e74c3c;
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.3s;
}

.btn-danger:hover {
    background: #c0392b;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
    
    .nav-user {
        justify-content: center;
    }
    
    .calendario-grid {
        flex-direction: column;
        padding: 5px;
    }
    
    .grid-horas {
        display: none;
    }
    
    .bloque {
        height: 45px;
        font-size: 0.7rem;
    }
    
    .tab-sala {
        padding: 8px 14px;
        font-size: 0.85rem;
    }
    
    .fecha-selector {
        flex-direction: column;
    }
    
    .fecha-selector input[type="date"] {
        width: 100%;
    }
    
    .fecha-selector button {
        width: 100%;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .form-inline {
        flex-direction: column;
    }
    
    .form-inline input {
        width: 100%;
    }
    
    .auth-box {
        padding: 25px;
    }
    
    .calendario-header {
        flex-direction: column;
        text-align: center;
        padding: 12px 16px;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .bloque {
        height: 40px;
        font-size: 0.6rem;
    }
    
    .usuario-bloque {
        max-width: 60px;
    }
}

/* ========== CLASES FIJAS ========== */
.bloque-clase {
    background: #e3f2fd;
    color: #003366;
    border-color: #1a4f8b;
    border-width: 2px;
    cursor: default;
}

.bloque-clase .usuario-bloque {
    font-weight: bold;
}

.bloque-ocupado {
    background: #ffebee;
    color: #c62828;
    border-color: #ef9a9a;
}

.bloque-ocupado-mio {
    background: #fff3e0;
    color: #e65100;
    border-color: #FFC300;
    border-width: 3px;
}

.bloque-disponible {
    background: #e8f5e9;
    color: #2e7d32;
    cursor: pointer;
    border-color: #a5d6a7;
}

.bloque-disponible:hover {
    background: #c8e6c9;
    transform: scale(1.02);
    border-color: #66bb6a;
    box-shadow: 0 2px 8px rgba(46, 125, 50, 0.3);
}

/* ========== FORMULARIO DE CLASES ========== */
.form-clase {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.form-row {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.form-row .form-group {
    flex: 1;
    min-width: 150px;
}

.form-row .form-group label {
    display: block;
    font-weight: 500;
    color: #555;
    margin-bottom: 4px;
    font-size: 0.9rem;
}

.form-row .form-group input,
.form-row .form-group select {
    width: 100%;
    padding: 10px;
    border-radius: 6px;
    border: 1px solid #ddd;
    font-size: 0.95rem;
}

.form-row .form-group input:focus,
.form-row .form-group select:focus {
    border-color: #003366;
    outline: none;
}

/* ========== BADGE CLASE ========== */
.badge-clase {
    background: #003366;
    color: white;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 0.65rem;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
    .form-row {
        flex-direction: column;
    }
    
    .form-row .form-group {
        min-width: 100%;
    }
}

/* ========== BADGE PENDIENTE ========== */
.badge-pendiente {
    background: #FFC300;
    color: #003366;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: bold;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* ========== TABLA DE SOLICITUDES ========== */
.admin-section .table-container {
    margin-top: 10px;
}

.admin-section .table-container table td form {
    display: inline-block;
    margin: 2px;
}

.admin-section .table-container table td form input[type="text"] {
    padding: 4px 8px;
    border-radius: 4px;
    border: 1px solid #ddd;
    font-size: 0.8rem;
}

.admin-section .table-container table td form input[type="text"]:focus {
    border-color: #003366;
    outline: none;
}
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f0f4f8;
    min-height: 100vh;
    /* Agregar imagen de fondo sutil */
    background-image: url('/static/images/fondo-institucional.jpg');
    background-size: cover;
    background-attachment: fixed;
    background-position: center;
}

/* Fondo para los contenedores (semi-transparente) */
.container {
    max-width: 1200px;
    margin: 20px auto;
    padding: 0 20px;
    background: rgba(255, 255, 255, 0.92);
    border-radius: 16px;
    padding: 20px 20px 30px 20px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
}

/* Para el panel de administración también */
.admin-section {
    background: rgba(255, 255, 255, 0.95);
    /* ... resto de estilos ... */
}

/* ========== BANNER INSTITUCIONAL ========== */
.banner-institucional {
    position: relative;
    width: 100%;
    height: 200px;
    overflow: hidden;
    border-radius: 16px;
    margin-bottom: 25px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.banner-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.banner-texto {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px 30px;
    background: linear-gradient(transparent, rgba(0,0,0,0.7));
    color: white;
}

.banner-texto h2 {
    margin: 0;
    font-size: 1.8rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.banner-texto p {
    margin: 5px 0 0 0;
    font-size: 1rem;
    opacity: 0.9;
}

.banner-sub {
    font-weight: bold;
    color: #ffd700;
    font-size: 1.1rem !important;
}

@media (max-width: 768px) {
    .banner-institucional {
        height: 150px;
    }
    .banner-texto h2 {
        font-size: 1.2rem;
    }
    .banner-texto p {
        font-size: 0.8rem;
    }
/* ========== BOTÓN ELIMINAR USUARIO ========== */
.btn-danger {
    background: #e74c3c;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.3s;
}

.btn-danger:hover {
    background: #c0392b;
    transform: translateY(-1px);
}

/* ========== TABLA DE USUARIOS ========== */
.admin-section table td {
    vertical-align: middle;
}

.admin-section table td select {
    background: white;
    cursor: pointer;
}

.admin-section table td select:focus {
    border-color: #3498db;
    outline: none;
 }

  /* ========== SELECCIÓN MÚLTIPLE DE HORAS ========== */
.bloque-seleccionado {
    background: linear-gradient(135deg, #ffd54f, #ffb300) !important;
    color: #000 !important;
    border-color: #ff8f00 !important;
    border-width: 3px !important;
    transform: scale(1.02);
    box-shadow: 0 4px 12px rgba(255, 152, 0, 0.4);
    animation: pulse-seleccion 1.5s ease-in-out infinite;
}

@keyframes pulse-seleccion {
    0%, 100% { transform: scale(1.02); }
    50% { transform: scale(1.05); }
}

/* ========== BOTÓN FLOTANTE DE RESERVA MÚLTIPLE (MEJORADO) ========== */
.btn-reserva-multiple {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: linear-gradient(135deg, #ffffff, #f8f9fa);
    padding: 20px 25px;
    border-radius: 16px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35), 0 0 0 4px rgba(255, 152, 0, 0.3);
    z-index: 99999;
    border-left: 6px solid #ff9800;
    min-width: 320px;
    max-width: 400px;
    display: none;
    animation: slideInUp 0.4s ease-out;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

@keyframes slideInUp {
    from {
        transform: translateY(100px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.btn-reserva-multiple .info-seleccion {
    margin-bottom: 15px;
    font-size: 1rem;
    color: #333;
    text-align: center;
    padding: 10px;
    background: #fff3e0;
    border-radius: 10px;
    border: 2px dashed #ff9800;
}

.btn-reserva-multiple .info-seleccion strong {
    color: #e65100;
    font-size: 1.05rem;
    display: block;
    margin-bottom: 5px;
}

.btn-reserva-multiple .info-seleccion span {
    display: block;
    font-size: 1.15rem;
    font-weight: bold;
    color: #1a237e;
    margin-top: 5px;
}

.btn-reservar-multiple {
    background: linear-gradient(135deg, #1a237e, #283593);
    color: white;
    border: none;
    padding: 15px 25px;
    border-radius: 10px;
    cursor: pointer;
    font-weight: bold;
    font-size: 1.05rem;
    width: 100%;
    margin-bottom: 10px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(26, 35, 126, 0.3);
    letter-spacing: 0.5px;
}

.btn-reservar-multiple:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(26, 35, 126, 0.5);
    background: linear-gradient(135deg, #283593, #1a237e);
}

.btn-reservar-multiple:active {
    transform: translateY(-1px);
}

.btn-limpiar-seleccion {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 10px;
    cursor: pointer;
    font-weight: bold;
    font-size: 0.95rem;
    width: 100%;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
}

.btn-limpiar-seleccion:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(231, 76, 60, 0.5);
    background: linear-gradient(135deg, #c0392b, #a93226);
}

/* Responsive: en móvil el botón ocupa todo el ancho */
@media (max-width: 768px) {
    .btn-reserva-multiple {
        bottom: 15px;
        right: 15px;
        left: 15px;
        min-width: auto;
        max-width: none;
        padding: 15px;
    }
    
    .btn-reservar-multiple {
        padding: 14px 20px;
        font-size: 1rem;
    }
    
    .btn-limpiar-seleccion {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
}

.info-seleccion {
    margin-bottom: 10px;
    font-size: 0.9rem;
    color: #333;
}

.info-seleccion strong {
    color: #ff9800;
}

.btn-reservar-multiple {
    background: linear-gradient(135deg, #1a237e, #283593);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
    width: 100%;
    margin-bottom: 5px;
    transition: all 0.3s;
}

.btn-reservar-multiple:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(26, 35, 126, 0.4);
}

.btn-limpiar-seleccion {
    background: #e74c3c;
    color: white;
    border: none;
    padding: 8px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
    width: 100%;
    transition: all 0.3s;
}

.btn-limpiar-seleccion:hover {
    background: #c0392b;
}

/* Responsive */
@media (max-width: 768px) {
    .btn-reserva-multiple {
        bottom: 10px;
        right: 10px;
        left: 10px;
        max-width: none;
    }
}
}