/* Reset y configuración base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    color: #212529;
    line-height: 1.6;
    min-height: 100vh;
}

/* Variables CSS */
:root {
    --primary-blue: #c1121f;
    --secondary-blue: #000000;
    --light-blue: #fff5f5;
    --dark-blue: #7f0d17;
    --white: #ffffff;
    --black: #000000;
    --gray-light: #f8f9fa;
    --gray-medium: #6c757d;
    --gray-dark: #343a40;
    --success: #28a745;
    --warning: #ffc107;
    --danger: #dc3545;
    --virtual-color: #17a2b8;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.15);
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
    color: var(--white);
    padding: 2rem 0;
    box-shadow: var(--shadow-lg);
    margin-bottom: 2rem;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.header p {
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 300;
}

/* Navegación */
.nav {
    background: var(--white);
    padding: 1rem 0;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    border-top: 3px solid var(--secondary-blue);
    position: relative;
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

/* Brand/Logo */
.nav-brand {
    display: flex;
    align-items: center;
}

.brand-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    text-decoration: none;
}

/* Botón hamburguesa */
.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.hamburger-line {
    width: 25px;
    height: 3px;
    background: var(--primary-blue);
    margin: 3px 0;
    transition: all 0.3s ease;
    border-radius: 2px;
}

/* Animación del botón hamburguesa */
.nav-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Menú de navegación */
.nav-menu {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    margin-left: 2rem;
}

.nav-left {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-link {
    color: var(--primary-blue);
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    white-space: nowrap;
}

.nav-link:hover {
    background: var(--light-blue);
    border-color: var(--secondary-blue);
    transform: translateY(-2px);
}

.nav-link.active {
    background: var(--primary-blue);
    color: var(--white);
}

.nav-user {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.9rem;
    white-space: nowrap;
}

.logout-btn {
    background: linear-gradient(135deg, #dc2626 0%, #ef4444 100%);
    color: white !important;
    border: 2px solid transparent;
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
}

.logout-btn:hover {
    background: linear-gradient(135deg, #b91c1c 0%, #dc2626 100%);
    border-color: #dc2626;
    color: white !important;
}

/* Responsive Navigation */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: 5rem;
        transition: left 0.3s ease;
        z-index: 1000;
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
        margin-left: 0;
        overflow-y: auto;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-left {
        flex-direction: column;
        gap: 0;
        width: 100%;
        margin-bottom: 2rem;
        align-items: center;
    }
    
    .nav-right {
        flex-direction: column;
        gap: 1rem;
        width: 100%;
        align-items: center;
    }
    
    .nav-link {
        width: 90%;
        text-align: center;
        padding: 1rem;
        margin: 0.5rem 0;
        border-radius: 12px;
        font-size: 1.1rem;
        display: block;
        cursor: pointer;
        pointer-events: auto;
    }
    
    .nav-user {
        text-align: center;
        font-size: 1rem;
        margin-bottom: 1rem;
        padding: 1rem;
        background: var(--light-blue);
        border-radius: 12px;
        width: 90%;
        display: block;
    }
    
    .logout-btn {
        width: 90%;
        text-align: center;
        padding: 1rem;
        font-size: 1.1rem;
        display: block;
        cursor: pointer;
        pointer-events: auto;
    }
}

@media (max-width: 480px) {
    .nav-content {
        padding: 0 1rem;
    }
    
    .brand-text {
        font-size: 1.3rem;
    }
    
    .nav-link {
        font-size: 1rem;
        padding: 0.8rem;
    }
}

/* Container principal */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Cards */
.card {
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    overflow: hidden;
    border: 1px solid #e9ecef;
    transition: all 0.3s ease;
}

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

.card-header {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--white);
    padding: 1.5rem;
    border-bottom: none;
}

.card-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
}

.card-body {
    padding: 2rem;
}

/* Formularios */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--gray-dark);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: var(--white);
}

.form-control:focus {
    outline: none;
    border-color: var(--secondary-blue);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.form-control:invalid {
    border-color: var(--danger);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

/* Botones */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--white);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--dark-blue) 0%, var(--primary-blue) 100%);
}

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

.btn-warning {
    background: var(--warning);
    color: var(--black);
}

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

.btn-secondary {
    background: var(--gray-medium);
    color: var(--white);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-group {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* Tabla */
.table-container {
    overflow-x: auto;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    margin: 0;
}

.table th {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--white);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    border: none;
}

.table td {
    padding: 1rem;
    border-bottom: 1px solid #e9ecef;
    vertical-align: middle;
}
.table td.fecha-cell {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    word-break: break-word;
}

.table tbody tr:hover {
    background: var(--light-blue);
}

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

/* Seminarios virtuales */
.virtual {
    background: linear-gradient(135deg, rgba(23, 162, 184, 0.1) 0%, rgba(23, 162, 184, 0.05) 100%);
    border-left: 4px solid var(--virtual-color);
}

.virtual-badge {
    background: var(--virtual-color);
    color: var(--white);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Filtros */
.filters {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    border-top: 4px solid var(--secondary-blue);
}

.filters-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    align-items: end;
}

/* Paginación */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.pagination a,
.pagination span {
    padding: 0.75rem 1rem;
    border: 2px solid var(--secondary-blue);
    color: var(--primary-blue);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.pagination a:hover {
    background: var(--secondary-blue);
    color: var(--white);
    transform: translateY(-2px);
}

.pagination .current {
    background: var(--primary-blue);
    color: var(--white);
    border-color: var(--primary-blue);
}

/* Alertas */
.alert {
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    border-left: 4px solid;
    font-weight: 500;
}

.alert-success {
    background: rgba(40, 167, 69, 0.1);
    color: #155724;
    border-color: var(--success);
}

.alert-danger {
    background: rgba(220, 53, 69, 0.1);
    color: #721c24;
    border-color: var(--danger);
}

.alert-warning {
    background: rgba(255, 193, 7, 0.1);
    color: #856404;
    border-color: var(--warning);
}

.alert-info {
    background: rgba(23, 162, 184, 0.1);
    color: #0c5460;
    border-color: var(--virtual-color);
}

/* Estados vacíos */
.empty-state {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--gray-medium);
}

.empty-state h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--gray-dark);
}

.empty-state p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

/* Loading */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--light-blue);
    border-top: 4px solid var(--secondary-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal.show {
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--white);
    padding: 1.5rem;
    border-radius: 12px 12px 0 0;
}

.modal-body {
    padding: 2rem;
}

.modal-footer {
    padding: 1rem 2rem 2rem;
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

/* Responsive */
@media (max-width: 768px) {
    .header h1 {
        font-size: 2rem;
    }
    
    .nav-content {
        flex-direction: column;
        align-items: center;
    }
    
    .container {
        padding: 10px;
        margin: 0 auto;
    }
    
    /* Mejoras para las alertas */
    .alert {
        margin: 10px 0;
        padding: 12px;
        font-size: 14px;
        border-radius: 6px;
    }
    
    /* Responsive para las cards */
    .card {
        margin-bottom: 15px;
        border-radius: 8px;
        box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    }
    
    .card-header {
        padding: 15px;
        background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
        color: white;
        border-radius: 8px 8px 0 0;
    }
    
    .card-header h2 {
        font-size: 18px;
        margin: 0;
        font-weight: 600;
    }
    
    .card-body {
        padding: 15px;
    }
    
    /* Responsive para los filtros */
    .filters-row {
        display: flex;
        flex-direction: column;
        gap: 15px;
    }
    
    .form-group {
        width: 100%;
    }
    
    .form-label {
        display: block;
        margin-bottom: 5px;
        font-weight: 500;
        color: #333;
        font-size: 14px;
    }
    
    .form-control {
        width: 100%;
        padding: 12px;
        border: 2px solid #e1e5e9;
        border-radius: 6px;
        font-size: 16px;
        transition: border-color 0.3s ease;
        -webkit-appearance: none;
        -moz-appearance: none;
        appearance: none;
    }
    
    .form-control:focus {
        outline: none;
        border-color: var(--secondary-blue);
        box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.1);
    }
    
    /* Botones de filtros responsive */
    .form-group:last-child {
        display: flex;
        flex-direction: column;
        gap: 10px;
        margin-top: 10px;
    }
    
    .btn {
        padding: 12px 20px;
        border: none;
        border-radius: 6px;
        font-size: 16px;
        font-weight: 500;
        cursor: pointer;
        transition: all 0.3s ease;
        text-decoration: none;
        display: inline-block;
        text-align: center;
        min-height: 48px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .btn-primary {
        background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
        color: white;
    }
    
    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
    }
    
    .btn-secondary {
        background: #6c757d;
        color: white;
    }
    
    .btn-secondary:hover {
        background: #5a6268;
        transform: translateY(-2px);
    }
    
    /* Responsive para el header de resultados */
    .card-header.d-flex {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start !important;
    }
    
    .card-header .btn-danger {
        width: 100%;
        padding: 10px;
        font-size: 14px;
        border-radius: 6px;
        background: #dc3545;
        color: white;
        border: none;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
    }
    
    .card-header .btn-danger:hover {
        background: #c82333;
        transform: translateY(-1px);
    }
    
    /* Empty state responsive */
    .empty-state {
        text-align: center;
        padding: 40px 20px;
    }
    
    .empty-state h3 {
        font-size: 20px;
        color: #666;
        margin-bottom: 10px;
    }
    
    .empty-state p {
        font-size: 16px;
        color: #888;
        margin: 0;
    }
     
     /* Responsive para el header de resultados */
     .card-header.d-flex {
         flex-direction: column;
         gap: 10px;
         align-items: flex-start !important;
     }
     
     .card-header .btn-danger {
         width: 100%;
         padding: 10px;
         font-size: 14px;
         border-radius: 6px;
         background: #dc3545;
         color: white;
         border: none;
         display: flex;
         align-items: center;
         justify-content: center;
         gap: 8px;
     }
     
     .card-header .btn-danger:hover {
         background: #c82333;
         transform: translateY(-1px);
     }
     
     /* Empty state responsive */
     .empty-state {
         text-align: center;
         padding: 40px 20px;
     }
     
     .empty-state h3 {
         font-size: 20px;
         color: #666;
         margin-bottom: 10px;
     }
     
     .empty-state p {
         font-size: 16px;
         color: #888;
         margin: 0;
     }
     
     .btn-group {
         justify-content: center;
     }
     
     /* Mejoras adicionales para botones de navegación móvil */
     .nav-link {
         padding: 15px 20px;
         font-size: 16px;
         font-weight: 500;
         border-radius: 8px;
         margin: 5px 0;
         transition: all 0.3s ease;
         display: block;
         text-align: center;
     }
     
     .nav-link:hover {
         background: rgba(255, 255, 255, 0.1);
         transform: translateX(5px);
     }
     
     .nav-link.active {
         background: rgba(255, 255, 255, 0.2);
         font-weight: 600;
     }
     
     .logout-btn {
         background: rgba(220, 53, 69, 0.2);
         color: #ff6b7a !important;
         margin-top: 20px;
     }
     
     .logout-btn:hover {
           background: rgba(220, 53, 69, 0.3);
           transform: translateX(0);
       }
       
       /* Ocultar tabla en móvil y mostrar cards */
       .desktop-view {
           display: none;
       }
       
       .mobile-cards-view {
           display: block;
       }
    
    /* Estilos para cards móviles */
    .mobile-seminar-card {
        background: var(--white);
        border-radius: 12px;
        box-shadow: var(--shadow);
        margin-bottom: 1rem;
        padding: 1.25rem;
        border-left: 4px solid var(--primary-blue);
        transition: all 0.3s ease;
    }
    
    .mobile-seminar-card:hover {
        transform: translateY(-2px);
        box-shadow: var(--shadow-lg);
    }
    
    .mobile-seminar-card.virtual {
        border-left-color: var(--virtual-color);
        background: linear-gradient(135deg, #ffffff 0%, #f0fdff 100%);
    }
    
    .mobile-card-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 0.75rem;
        padding-bottom: 0.75rem;
        border-bottom: 1px solid #e9ecef;
    }
    
    .mobile-card-country {
        font-size: 1.1rem;
        color: var(--primary-blue);
        font-weight: 700;
    }
    
    .mobile-card-year {
        background: var(--primary-blue);
        color: var(--white);
        padding: 0.25rem 0.75rem;
        border-radius: 20px;
        font-size: 0.875rem;
        font-weight: 600;
    }
    
    .mobile-card-title {
        font-size: 1.05rem;
        font-weight: 600;
        color: var(--gray-dark);
        margin-bottom: 1rem;
        line-height: 1.4;
    }
    
    .mobile-card-details {
        margin-bottom: 1.25rem;
    }
    
    .mobile-detail-row {
        display: flex;
        align-items: center;
        margin-bottom: 0.5rem;
        padding: 0.5rem 0;
    }
    
    .mobile-detail-icon {
        font-size: 1.1rem;
        margin-right: 0.75rem;
        width: 24px;
        text-align: center;
    }
    
.mobile-detail-text {
    color: var(--gray-medium);
    font-size: 0.95rem;
    flex: 1;
}
.mobile-detail-text.fecha {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    word-break: break-word;
}
    
    .mobile-card-actions {
        display: flex;
        gap: 0.75rem;
        justify-content: flex-end;
        padding-top: 0.75rem;
        border-top: 1px solid #e9ecef;
    }
    
    .mobile-btn {
        flex: 1;
        text-align: center;
        padding: 12px 16px;
        font-size: 14px;
        font-weight: 600;
        border-radius: 8px;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        border: none;
        cursor: pointer;
        transition: all 0.3s ease;
        text-decoration: none;
        min-height: 44px;
    }
    
    .mobile-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    }
    
    .mobile-btn.btn-edit {
        background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
        color: white;
    }
    
    .mobile-btn.btn-edit:hover {
        background: linear-gradient(135deg, #218838 0%, #1ea080 100%);
    }
    
    .mobile-btn.btn-delete {
        background: linear-gradient(135deg, #dc3545 0%, #e74c3c 100%);
        color: white;
    }
    
    .mobile-btn.btn-delete:hover {
        background: linear-gradient(135deg, #c82333 0%, #c0392b 100%);
    }
    
    /* Mejoras adicionales para pantallas muy pequeñas */
    @media (max-width: 480px) {
        .mobile-card-actions {
            flex-direction: column;
            gap: 10px;
        }
        
        .mobile-btn {
            width: 100%;
            padding: 14px 20px;
            font-size: 16px;
        }
    }
}

/* Ocultar vista móvil en escritorio */
@media (min-width: 769px) {
    .mobile-cards-view {
        display: none;
    }
    
    .desktop-view {
        display: block;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 1.5rem 0;
    }
    
    .header h1 {
        font-size: 1.75rem;
    }
    
    .container {
        padding: 8px;
    }
    
    .card {
        margin-bottom: 12px;
        border-radius: 6px;
    }
    
    .card-header {
        padding: 12px;
    }
    
    .card-header h2 {
        font-size: 16px;
    }
    
    .card-body {
        padding: 12px;
    }
    
    .filters-row {
        gap: 12px;
    }
    
    .form-control {
        padding: 10px;
        font-size: 16px;
    }
    
    .btn {
        padding: 10px 16px;
        font-size: 14px;
        min-height: 44px;
    }
    
    .mobile-seminar-card {
        padding: 15px;
        margin-bottom: 12px;
        border-radius: 8px;
    }
    
    .mobile-card-header {
        margin-bottom: 12px;
        padding-bottom: 12px;
    }
    
    .mobile-card-country {
        font-size: 16px;
    }
    
    .mobile-card-year {
        padding: 4px 12px;
        font-size: 12px;
    }
    
    .mobile-card-title {
        font-size: 15px;
        margin-bottom: 15px;
    }
    
    .mobile-card-details {
        margin-bottom: 15px;
    }
    
    .mobile-detail-row {
        margin-bottom: 8px;
        padding: 8px 0;
    }
    
    .mobile-detail-icon {
        font-size: 16px;
        margin-right: 12px;
        width: 20px;
    }
    
    .mobile-detail-text {
        font-size: 14px;
    }
    
    .modal-content {
        width: 95%;
        margin: 20px auto;
    }
    
    .modal-body {
        padding: 1.5rem;
    }
    
    /* Ajustes específicos para navegación móvil en pantallas pequeñas */
    .nav-brand .brand-text {
        font-size: 18px;
    }
    
    .nav-toggle {
        width: 35px;
        height: 35px;
    }
    
    .hamburger-line {
        height: 2px;
    }
    
    .nav-menu {
        padding: 15px;
    }
    
    .nav-left, .nav-right {
        gap: 8px;
    }
    
    .nav-link {
        padding: 12px 16px;
        font-size: 15px;
        margin: 3px 0;
    }
    
    .nav-user {
        font-size: 14px;
        padding: 8px 0;
    }
}

/* Utilidades */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.justify-content-between { justify-content: space-between; }
.align-items-center { align-items: center; }
.w-100 { width: 100%; }
.text-muted { color: var(--gray-medium); }
.text-primary { color: var(--primary-blue); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: #856404; }
.fw-bold { font-weight: 700; }
.fw-normal { font-weight: 400; }

/* Modal Styles */
.modal {
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
}

.modal-content {
    background-color: var(--white);
    margin: 5% auto;
    padding: 0;
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid #e9ecef;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white);
    border-radius: 12px 12px 0 0;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
}

.close {
    color: var(--white);
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    line-height: 1;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.close:hover {
    opacity: 1;
}

.modal-body {
    padding: 2rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid #e9ecef;
}

.btn-secondary {
    background-color: var(--gray-medium);
    color: var(--white);
}

.btn-secondary:hover {
    background-color: var(--gray-dark);
    transform: translateY(-2px);
}

/* Responsive modal */
@media (max-width: 768px) {
    .modal-content {
        margin: 10% auto;
        width: 95%;
    }
    
    .modal-header,
    .modal-body {
        padding: 1rem;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .form-actions .btn {
        width: 100%;
    }
}