:root {
    --azul-oscuro: #003366;
    --azul-medio: #0066cc;
    --azul-claro: #e6f3ff;
    --dorado: #FFD700;
    --dorado-oscuro: #FFC000;
    --blanco: #ffffff;
    --gris-claro: #f8f9fa;
    --gris-medio: #e9ecef;
    --gris-oscuro: #6c757d;
    --sombra: 0 10px 25px rgba(0, 51, 102, 0.1);
    --sombra-hover: 0 15px 30px rgba(0, 51, 102, 0.2);
    --verde: #28a745;
    --rojo: #dc3545;
    --amarillo-oscuro: #FFCC00;
    --amarillo-claro: #FFEEAA;
    --gradiente-azul: linear-gradient(135deg, var(--azul-oscuro), var(--azul-medio));
    --gradiente-dorado: linear-gradient(135deg, var(--dorado-oscuro), var(--dorado));
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    color: var(--azul-oscuro);
    min-height: 100vh;
    padding-bottom: 70px;
    line-height: 1.6;
}

/* Mejoras generales para cards */
.card {
    background: var(--blanco);
    border-radius: 16px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--sombra);
    border: 1px solid rgba(0, 51, 102, 0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradiente-azul);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--sombra-hover);
}

.card h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--azul-oscuro);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card h3::before {
    content: '';
    width: 4px;
    height: 24px;
    background: var(--gradiente-azul);
    border-radius: 2px;
}

/* Formularios mejorados */
.form-group {
    margin-bottom: 24px;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--azul-oscuro);
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--gris-medio);
    border-radius: 12px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: var(--blanco);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--azul-medio);
    box-shadow: 0 0 0 4px rgba(0, 102, 204, 0.1);
    transform: translateY(-2px);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

/* Botones mejorados */
button,
.btn {
    padding: 14px 28px;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

button:before,
.btn:before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

button:hover:before,
.btn:hover:before {
    left: 100%;
}

button[type="submit"],
.btn-primary {
    background: var(--gradiente-azul);
    color: var(--blanco);
    box-shadow: var(--sombra);
}

button[type="submit"]:hover,
.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--sombra-hover);
}

/* Estilos específicos para accesos.php */
.search-container {
    position: relative;
    margin-bottom: 20px;
}

.search-container::before {
    content: '\f002';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gris-oscuro);
    z-index: 2;
}

#searchBomberos {
    padding-left: 50px;
    background: var(--blanco);
    border: 2px solid var(--gris-medio);
    border-radius: 12px;
    font-size: 16px;
    height: 50px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

#searchBomberos:focus {
    border-color: var(--azul-medio);
    box-shadow: 0 0 0 4px rgba(0, 102, 204, 0.1);
    outline: none;
}

.selector-bomberos {
    background: linear-gradient(135deg, #f8f9ff 0%, #e6f3ff 100%);
    border: 2px solid var(--azul-claro);
    border-radius: 16px;
    padding: 24px;
    margin: 24px 0;
    position: relative;
    overflow: hidden;
}

.selector-bomberos::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradiente-azul);
}

.selector-title {
    font-weight: 700;
    font-size: 18px;
    margin-bottom: 16px;
    color: var(--azul-oscuro);
    display: flex;
    align-items: center;
    gap: 10px;
}

.selector-title::before {
    content: '\f0c0';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    color: var(--azul-medio);
}

.results-container {
    border: 2px solid var(--gris-medio);
    border-radius: 12px;
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: 20px;
    background: var(--blanco);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.results-container::-webkit-scrollbar {
    width: 8px;
}

.results-container::-webkit-scrollbar-track {
    background: var(--gris-claro);
    border-radius: 4px;
}

.results-container::-webkit-scrollbar-thumb {
    background: var(--azul-medio);
    border-radius: 4px;
}

.bombero-item {
    padding: 16px 20px;
    border-bottom: 1px solid var(--gris-claro);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
    position: relative;
}

.bombero-item:last-child {
    border-bottom: none;
}

.bombero-item:hover {
    background: linear-gradient(135deg, #f0f7ff 0%, #e6f3ff 100%);
    transform: translateX(5px);
}

.bombero-item.selected {
    background: linear-gradient(135deg, var(--azul-claro) 0%, #cce7ff 100%);
    border-left: 4px solid var(--azul-medio);
}

.bombero-item.selected::after {
    content: '\f00c';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    position: absolute;
    right: 20px;
    color: var(--verde);
    font-size: 18px;
}

.bombero-info {
    flex: 1;
}

.bombero-info strong {
    display: block;
    color: var(--azul-oscuro);
    font-weight: 600;
    margin-bottom: 4px;
}

.bombero-info small {
    color: var(--gris-oscuro);
    font-size: 14px;
}

.email-warning {
    color: var(--rojo);
    font-size: 12px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 4px;
}

.email-warning::before {
    content: '\f071';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
}

.selected-container {
    margin-top: 20px;
    padding: 20px;
    background: linear-gradient(135deg, #f0fff4 0%, #e6ffed 100%);
    border-radius: 12px;
    border: 2px solid #d4edda;
}

.selected-item {
    background: var(--blanco);
    padding: 16px 20px;
    margin: 8px 0;
    border-radius: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    border-left: 4px solid var(--verde);
    transition: all 0.3s ease;
}

.selected-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.remove-btn {
    color: var(--rojo);
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: rgba(220, 53, 69, 0.1);
}

.remove-btn:hover {
    background: var(--rojo);
    color: var(--blanco);
    transform: scale(1.1);
}

.no-results {
    padding: 40px 20px;
    color: var(--gris-oscuro);
    text-align: center;
    font-style: italic;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.no-results::before {
    content: '\f05a';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    font-size: 24px;
    color: var(--azul-medio);
}

/* Alertas mejoradas */
.alert {
    padding: 16px 20px;
    margin-bottom: 24px;
    border-radius: 12px;
    font-weight: 500;
    border-left: 4px solid transparent;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.alert::before {
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    font-size: 18px;
}

.alert.alert-success,
.alert.exito {
    background: linear-gradient(135deg, #d4edda 0%, #c8e6c9 100%);
    color: #155724;
    border-left-color: var(--verde);
}

.alert.alert-success::before,
.alert.exito::before {
    content: '\f00c';
    color: var(--verde);
}

.alert.error {
    background: linear-gradient(135deg, #f8d7da 0%, #ffcdd2 100%);
    color: #721c24;
    border-left-color: var(--rojo);
}

.alert.error::before {
    content: '\f071';
    color: var(--rojo);
}

/* Tablas mejoradas */
.table-container {
    overflow-x: auto;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    background: var(--blanco);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--blanco);
}

th {
    background: var(--gradiente-azul);
    color: var(--blanco);
    padding: 16px 20px;
    text-align: left;
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: sticky;
    top: 0;
    z-index: 10;
}

td {
    padding: 16px 20px;
    border-bottom: 1px solid var(--gris-claro);
    transition: background-color 0.3s ease;
}

tr:hover td {
    background: linear-gradient(135deg, #f8f9ff 0%, #f0f7ff 100%);
}

/* Estados mejorados */
.status-available {
    color: var(--verde);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
}

.status-available::before {
    content: '\f00c';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
}

.status-used {
    color: var(--rojo);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
}

.status-used::before {
    content: '\f00d';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
}

/* Header mejorado */
.admin-header {
    background: var(--gradiente-azul);
    color: var(--blanco);
    padding: 20px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--sombra);
    position: relative;
    overflow: hidden;
}

.admin-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="0.5" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="0.3" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="0.4" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.1;
}

.admin-header h1 {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 0.5px;
    position: relative;
    z-index: 1;
}

/* Botón logout mejorado */
.logout-btn {
    background: var(--gradiente-dorado);
    color: var(--azul-oscuro);
    border: none;
    padding: 12px 20px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
    z-index: 1;
    box-shadow: 0 4px 12px rgba(255, 215, 0, 0.3);
}

.logout-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(255, 215, 0, 0.4);
}

/* Contenido principal mejorado */
.admin-content {
    flex: 1;
    padding: 30px;
    background: transparent;
    margin: 30px;
    border-radius: 16px;
    position: relative;
}

.admin-content h2 {
    font-size: 32px;
    margin-bottom: 30px;
    color: var(--azul-oscuro);
    font-weight: 700;
    text-align: center;
    position: relative;
    padding-bottom: 15px;
}

.admin-content h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradiente-azul);
    border-radius: 2px;
}

/* Menu inferior mejorado */
.bottom-nav {
    background: var(--gradiente-azul);
    display: flex;
    justify-content: space-around;
    padding: 12px 0;
    box-shadow: 0 -5px 20px rgba(0, 0, 0, 0.3);
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.nav-item {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: all 0.3s ease;
    padding: 8px 12px;
    border-radius: 12px;
    position: relative;
    overflow: hidden;
}

.nav-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    transform: scale(0);
    transition: transform 0.3s ease;
}

.nav-item.active::before,
.nav-item:hover::before {
    transform: scale(1);
}

.nav-item.active {
    color: var(--dorado);
    transform: translateY(-3px);
}

.nav-item i {
    font-size: 22px;
    margin-bottom: 4px;
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
}

.nav-item.active i {
    transform: scale(1.2);
}

.nav-item span {
    font-size: 12px;
    font-weight: 600;
    position: relative;
    z-index: 1;
}

/* Responsive mejorado */
@media (max-width: 768px) {
    .admin-header {
        padding: 15px 20px;
    }
    
    .admin-header h1 {
        font-size: 18px;
    }
    
    .admin-content {
        margin: 15px;
        padding: 20px;
    }
    
    .admin-content h2 {
        font-size: 24px;
    }
    
    .card {
        padding: 20px;
    }
    
    .selector-bomberos {
        padding: 16px;
    }
    
    .bombero-item {
        padding: 12px 16px;
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .selected-item {
        padding: 12px 16px;
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .nav-item i {
        font-size: 20px;
    }
    
    .nav-item span {
        font-size: 11px;
    }
}

@media (max-width: 480px) {
    .admin-content {
        margin: 10px;
        padding: 15px;
    }
    
    .card {
        padding: 15px;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 12px 14px;
    }
    
    button,
    .btn {
        padding: 12px 20px;
        font-size: 14px;
    }
    
    .table-container {
        font-size: 14px;
    }
    
    th, td {
        padding: 12px 16px;
    }
}

/* Animaciones adicionales */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.card {
    animation: fadeInUp 0.6s ease-out;
}

.bombero-item {
    animation: slideInRight 0.3s ease-out;
}

.selected-item {
    animation: fadeInUp 0.4s ease-out;
}

/* Efectos de carga */
.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.7;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--azul-claro);
    border-radius: 50%;
    border-top-color: var(--azul-medio);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}