/* Estilos del frontend para PDF Gallery */

.pdf-gallery {
    margin: 20px 0;
}

.pdf-gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.pdf-gallery-grid.columns-1 { grid-template-columns: 1fr; }
.pdf-gallery-grid.columns-2 { grid-template-columns: repeat(auto-fill, minmax(400px, 1fr)); }
.pdf-gallery-grid.columns-3 { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }
.pdf-gallery-grid.columns-4 { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
.pdf-gallery-grid.columns-5 { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); }
.pdf-gallery-grid.columns-6 { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }

.pdf-item {
    background: #fff;
    border: 1px solid #EBECEE;
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(37, 96, 126, 0.1);
    position: relative;
    overflow: hidden;
}

.pdf-item:hover {
    box-shadow: 0 4px 15px rgba(37, 96, 126, 0.15);
    transform: translateY(-2px);
    border-color: #25607E;
}

.pdf-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #25607E, #4A7FA0);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.pdf-item:hover::before {
    transform: scaleX(1);
}

.pdf-icon {
    font-size: 48px;
    color: #25607E;
    margin-bottom: 15px;
    display: block;
    text-shadow: 0 2px 4px rgba(37, 96, 126, 0.1);
}

.pdf-title {
    font-size: 16px;
    font-weight: 600;
    color: #25607E;
    margin: 0 0 10px 0;
    line-height: 1.4;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.pdf-category {
    font-size: 12px;
    color: #25607E;
    background: #EBECEE;
    padding: 4px 10px;
    border-radius: 12px;
    display: inline-block;
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
}

.pdf-meta {
    font-size: 11px;
    color: #25607E;
    margin-bottom: 15px;
}

.pdf-actions {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
}

.pdf-download-btn,
.pdf-view-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.3s ease;
    cursor: pointer;
    line-height: 1;
}

.pdf-download-btn {
    background: #25607E;
    color: #fff;
}

.pdf-download-btn:hover {
    background: #1A4A63;
    color: #fff;
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(37, 96, 126, 0.3);
}

.pdf-view-btn {
    background: #EBECEE;
    color: #25607E;
    border: 1px solid #25607E;
}

.pdf-view-btn:hover {
    background: #25607E;
    color: #fff;
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(37, 96, 126, 0.3);
}

.pdf-download-btn::before {
    content: "⬇";
    font-size: 14px;
}

.pdf-view-btn::before {
    content: "👁";
    font-size: 14px;
}

/* Filtros y búsqueda del frontend */
.pdf-gallery-filters {
    background: #EBECEE;
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 20px;
    border: 1px solid #25607E;
}

.pdf-search-input {
    width: 100%;
    max-width: 300px;
    padding: 10px 15px;
    border: 1px solid #25607E;
    border-radius: 25px;
    font-size: 14px;
    background: #fff;
    transition: all 0.3s ease;
}

.pdf-search-input:focus {
    outline: none;
    border-color: #25607E;
    box-shadow: 0 0 0 3px rgba(37, 96, 126, 0.1);
}

.pdf-search-input::placeholder {
    color: #25607E;
    opacity: 0.7;
}

/* Estados especiales */
.pdf-gallery-no-results {
    text-align: center;
    padding: 40px 20px;
    color: #25607E;
    font-style: italic;
    background: #EBECEE;
    border-radius: 6px;
    border: 1px solid #25607E;
}

.pdf-gallery-loading {
    text-align: center;
    padding: 40px 20px;
}

.pdf-gallery-loading::after {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid #EBECEE;
    border-top: 2px solid #25607E;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Paginación */
.pdf-gallery-pagination {
    text-align: center;
    margin-top: 30px;
}

.pdf-gallery-pagination .page-numbers {
    display: inline-block;
    padding: 8px 12px;
    margin: 0 3px;
    border: 1px solid #ddd;
    border-radius: 4px;
    text-decoration: none;
    color: #333;
    transition: all 0.3s ease;
}

.pdf-gallery-pagination .page-numbers:hover,
.pdf-gallery-pagination .page-numbers.current {
    background: #25607E;
    color: #fff;
    border-color: #25607E;
}

/* Responsive */
@media (max-width: 768px) {
    .pdf-gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 15px;
    }
    
    .pdf-gallery-grid.columns-1,
    .pdf-gallery-grid.columns-2,
    .pdf-gallery-grid.columns-3,
    .pdf-gallery-grid.columns-4,
    .pdf-gallery-grid.columns-5,
    .pdf-gallery-grid.columns-6 {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
    
    .pdf-item {
        padding: 15px;
    }
    
    .pdf-icon {
        font-size: 36px;
    }
    
    .pdf-title {
        font-size: 14px;
        min-height: 36px;
    }
    
    .pdf-actions {
        flex-direction: column;
    }
    
    .pdf-download-btn,
    .pdf-view-btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .pdf-gallery-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .pdf-gallery-grid.columns-1,
    .pdf-gallery-grid.columns-2,
    .pdf-gallery-grid.columns-3,
    .pdf-gallery-grid.columns-4,
    .pdf-gallery-grid.columns-5,
    .pdf-gallery-grid.columns-6 {
        grid-template-columns: 1fr;
    }
}

/* Animaciones de entrada */
.pdf-item {
    animation: fadeInUp 0.6s ease-out;
}

.pdf-item:nth-child(2) { animation-delay: 0.1s; }
.pdf-item:nth-child(3) { animation-delay: 0.2s; }
.pdf-item:nth-child(4) { animation-delay: 0.3s; }
.pdf-item:nth-child(5) { animation-delay: 0.4s; }
.pdf-item:nth-child(6) { animation-delay: 0.5s; }

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

/* Tema oscuro (opcional) */
@media (prefers-color-scheme: dark) {
    .pdf-item {
        background: #2d3748;
        border-color: #4a5568;
        color: #e2e8f0;
    }
    
    .pdf-title {
        color: #e2e8f0;
    }
    
    .pdf-category {
        background: #4a5568;
        color: #a0aec0;
    }
    
    .pdf-meta {
        color: #a0aec0;
    }
    
    .pdf-gallery-filters {
        background: #2d3748;
        border-color: #4a5568;
    }
    
    .pdf-search-input {
        background: #4a5568;
        border-color: #718096;
        color: #e2e8f0;
    }
    
    .pdf-search-input::placeholder {
        color: #a0aec0;
    }
}

/* Accesibilidad */
.pdf-download-btn:focus,
.pdf-view-btn:focus {
    outline: 2px solid #25607E;
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    .pdf-item,
    .pdf-download-btn,
    .pdf-view-btn {
        transition: none;
    }
    
    .pdf-item {
        animation: none;
    }
}

/* Utilidades */
.pdf-gallery-hidden {
    display: none !important;
}

.pdf-gallery-loading {
    opacity: 0.6;
    pointer-events: none;
}