/**
 * Estilos Frontend - Estudios PDF PRO
 * 
 * Desarrollado por: Ing. Abel Cabral Ramirez
 * Teléfono: +595982172897
 * Empresa: SC-Innovations
 */

/* =============================================================================
   VARIABLES CSS
   ============================================================================= */
:root {
    --estudios-primary: #007cba;
    --estudios-secondary: #50575e;
    --estudios-success: #00a32a;
    --estudios-warning: #ff6900;
    --estudios-danger: #d63638;
    --estudios-light: #f1f1f1;
    --estudios-dark: #1d2327;
    --estudios-border: #ddd;
    --estudios-shadow: 0 2px 8px rgba(0,0,0,0.1);
    --estudios-border-radius: 6px;
    --estudios-transition: all 0.3s ease;
}

/* =============================================================================
   CONTENEDORES PRINCIPALES
   ============================================================================= */
.estudios-archive-container,
.single-study {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* =============================================================================
   FILTROS Y NAVEGACIÓN
   ============================================================================= */
.estudios-filters {
    background: #fff;
    border: 1px solid var(--estudios-border);
    border-radius: var(--estudios-border-radius);
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: var(--estudios-shadow);
}

.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    align-items: center;
}

.filter-bar label {
    font-weight: 600;
    color: var(--estudios-dark);
}

.filter-bar select,
.filter-bar input[type="text"] {
    padding: 8px 12px;
    border: 1px solid var(--estudios-border);
    border-radius: 4px;
    font-size: 14px;
    transition: var(--estudios-transition);
}

.filter-bar select:focus,
.filter-bar input[type="text"]:focus {
    border-color: var(--estudios-primary);
    outline: none;
    box-shadow: 0 0 0 2px rgba(0, 124, 186, 0.1);
}

/* =============================================================================
   GRID DE ESTUDIOS - RESPONSIVE CON 3 COLUMNAS MÁXIMO
   ============================================================================= */
.estudios-grid {
    display: grid;
    gap: 25px;
    margin-bottom: 40px;
    grid-template-columns: 1fr; /* Mobile First - 1 columna por defecto */
}

/* Tablet (768px+) - 2 columnas */
@media (min-width: 768px) {
    .estudios-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
}

/* Desktop (992px+) - 3 columnas */
@media (min-width: 992px) {
    .estudios-grid {
        grid-template-columns: repeat(3, 1fr) !important;
    }
}

/* Layouts específicos */
.estudios-grid.layout-grid {
    /* Usar breakpoints responsive por defecto */
}

.estudios-grid.layout-list {
    grid-template-columns: 1fr;
}

/* Elementor Grid - Override para widgets de Elementor */
.elementor-studies-grid {
    display: grid !important;
    gap: 25px !important;
    grid-template-columns: 1fr !important;
}

@media (min-width: 768px) {
    .elementor-studies-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
}

@media (min-width: 992px) {
    .elementor-studies-grid {
        grid-template-columns: repeat(3, 1fr) !important;
    }
}

/* =============================================================================
   TARJETAS DE ESTUDIOS
   ============================================================================= */
.estudio-card {
    background: #fff;
    border: 1px solid var(--estudios-border);
    border-radius: var(--estudios-border-radius);
    overflow: hidden;
    transition: var(--estudios-transition);
    box-shadow: var(--estudios-shadow);
    height: 100%;
}

.estudio-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.15);
}

.study-card-inner {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.study-thumbnail {
    position: relative;
    overflow: hidden;
    height: 200px;
}

.study-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--estudios-transition);
}

.estudio-card:hover .study-thumbnail img {
    transform: scale(1.05);
}

.restricted-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(214, 54, 56, 0.9);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}

.restricted-badge .dashicons {
    font-size: 14px;
    width: 14px;
    height: 14px;
    margin-right: 4px;
}

.study-content {
    padding: 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.study-title {
    margin: 0 0 10px 0;
    font-size: 18px;
    font-weight: 600;
    line-height: 1.3;
}

.study-title a {
    color: var(--estudios-dark);
    text-decoration: none;
    transition: var(--estudios-transition);
}

.study-title a:hover {
    color: var(--estudios-primary);
}

.study-description {
    color: var(--estudios-secondary);
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: 15px;
    flex-grow: 1;
}

.study-categories {
    margin-bottom: 15px;
}

.category-tag {
    display: inline-block;
    background: var(--estudios-light);
    color: var(--estudios-secondary);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    margin-right: 5px;
    margin-bottom: 5px;
    text-decoration: none;
    transition: var(--estudios-transition);
}

.category-tag:hover {
    background: var(--estudios-primary);
    color: white;
}

.study-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    font-size: 14px;
    color: var(--estudios-secondary);
}

.study-price {
    font-weight: 600;
    color: var(--estudios-success);
}

.study-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: auto;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--estudios-transition);
    gap: 5px;
    min-height: 36px;
}

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

.btn-primary:hover {
    background: #005a87;
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--estudios-light);
    color: var(--estudios-dark);
    border: 1px solid var(--estudios-border);
}

.btn-secondary:hover {
    background: var(--estudios-border);
}

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

.btn-download:hover {
    background: #008a20;
}

.btn-purchase {
    background: var(--estudios-warning);
    color: white;
}

.btn-purchase:hover {
    background: #e55a00;
}

.btn-preview {
    background: var(--estudios-secondary);
    color: white;
}

.btn-preview:hover {
    background: #3a3f45;
}

/* =============================================================================
   PÁGINA INDIVIDUAL DEL ESTUDIO
   ============================================================================= */
.single-study {
    max-width: 1000px;
}

.study-header {
    background: #fff;
    padding: 30px;
    border-radius: var(--estudios-border-radius);
    margin-bottom: 30px;
    box-shadow: var(--estudios-shadow);
}

.study-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--estudios-dark);
}

.study-excerpt {
    font-size: 18px;
    color: var(--estudios-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
}

.study-meta {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.study-categories {
    display: flex;
    gap: 10px;
}

.category-link {
    background: var(--estudios-light);
    color: var(--estudios-secondary);
    padding: 6px 12px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 14px;
    transition: var(--estudios-transition);
}

.category-link:hover {
    background: var(--estudios-primary);
    color: white;
}

.study-content-wrapper {
    background: #fff;
    border-radius: var(--estudios-border-radius);
    overflow: hidden;
    box-shadow: var(--estudios-shadow);
}

.study-extended-content {
    padding: 30px;
    line-height: 1.7;
    color: var(--estudios-dark);
}

.study-extended-content h2,
.study-extended-content h3,
.study-extended-content h4 {
    color: var(--estudios-dark);
    margin-top: 30px;
    margin-bottom: 15px;
}

.study-extended-content h2 {
    font-size: 24px;
    font-weight: 600;
    border-bottom: 2px solid var(--estudios-primary);
    padding-bottom: 10px;
}

/* =============================================================================
   VISUALIZADOR PDF
   ============================================================================= */
.pdf-viewer-container {
    background: #f8f9fa;
    border: 1px solid var(--estudios-border);
    border-radius: var(--estudios-border-radius);
    margin: 20px 0;
    overflow: hidden;
}

.preview-notice {
    background: var(--estudios-warning);
    color: white;
    padding: 15px;
    text-align: center;
    font-weight: 600;
    border-bottom: 1px solid var(--estudios-border);
}

.pdf-controls {
    background: #fff;
    padding: 15px;
    border-bottom: 1px solid var(--estudios-border);
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.btn-control {
    background: var(--estudios-primary);
    color: white;
    border: none;
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: var(--estudios-transition);
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.btn-control:hover {
    background: #005a87;
    transform: translateY(-1px);
}

.btn-control:disabled {
    background: var(--estudios-light);
    color: var(--estudios-secondary);
    cursor: not-allowed;
    transform: none;
}

#page-info,
#zoom-info {
    font-weight: 600;
    color: var(--estudios-secondary);
    margin-left: auto;
}

.pdf-loading {
    text-align: center;
    padding: 40px;
    color: var(--estudios-secondary);
}

.loading-spinner {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid var(--estudios-light);
    border-top: 4px solid var(--estudios-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 15px;
}

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

#pdf-canvas {
    display: block;
    margin: 0 auto;
    max-width: 100%;
    height: auto;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.pdf-error {
    background: var(--estudios-danger);
    color: white;
    padding: 20px;
    text-align: center;
    border-radius: var(--estudios-border-radius);
    margin: 20px 0;
}

/* =============================================================================
   BOTONES DE ACCIÓN Y ACCESO
   ============================================================================= */
.action-buttons {
    background: #fff;
    padding: 20px;
    border-top: 1px solid var(--estudios-border);
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    justify-content: center;
}

.access-info {
    background: var(--estudios-light);
    border: 1px solid var(--estudios-border);
    border-radius: var(--estudios-border-radius);
    padding: 20px;
    margin: 20px 0;
    text-align: center;
}

.access-info ul {
    list-style: none;
    padding: 0;
    margin: 15px 0 0 0;
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* =============================================================================
   COMPARTIR EN REDES SOCIALES
   ============================================================================= */
.social-sharing {
    background: #fff;
    border: 1px solid var(--estudios-border);
    border-radius: var(--estudios-border-radius);
    padding: 20px;
    margin: 20px 0;
}

.social-sharing h4 {
    margin: 0 0 15px 0;
    color: var(--estudios-dark);
}

.social-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

.social-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    border: none;
    border-radius: 4px;
    color: white;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--estudios-transition);
    min-width: 120px;
    justify-content: center;
}

.social-btn.linkedin { background: #0077b5; }
.social-btn.facebook { background: #1877f2; }
.social-btn.twitter { background: #1da1f2; }
.social-btn.whatsapp { background: #25d366; }
.social-btn.copy-link { background: var(--estudios-secondary); }

.social-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    color: white;
    text-decoration: none;
}

/* =============================================================================
   BREADCRUMBS
   ============================================================================= */
.estudios-breadcrumbs {
    margin-bottom: 30px;
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 10px;
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 14px;
    color: var(--estudios-secondary);
}

.breadcrumb-item {
    display: flex;
    align-items: center;
}

.breadcrumb-item a {
    color: var(--estudios-primary);
    text-decoration: none;
    transition: var(--estudios-transition);
}

.breadcrumb-item a:hover {
    color: #005a87;
    text-decoration: underline;
}

.breadcrumb-item.active span {
    color: var(--estudios-secondary);
    font-weight: 600;
}

.breadcrumb-separator {
    color: var(--estudios-border);
    font-size: 12px;
}

/* =============================================================================
   GRID DE CATEGORÍAS
   ============================================================================= */
.categories-grid {
    display: grid;
    gap: 25px;
    margin-bottom: 40px;
}

.categories-grid.columns-2 { grid-template-columns: repeat(auto-fill, minmax(400px, 1fr)); }
.categories-grid.columns-3 { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.categories-grid.columns-4 { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }

.category-card {
    background: #fff;
    border: 1px solid var(--estudios-border);
    border-radius: var(--estudios-border-radius);
    overflow: hidden;
    transition: var(--estudios-transition);
    box-shadow: var(--estudios-shadow);
}

.category-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.15);
}

.category-image {
    height: 150px;
    overflow: hidden;
}

.category-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--estudios-transition);
}

.category-content {
    padding: 20px;
}

.category-name {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
}

.category-name a {
    color: var(--estudios-dark);
    text-decoration: none;
    transition: var(--estudios-transition);
}

.category-name a:hover {
    color: var(--estudios-primary);
}

.category-description {
    color: var(--estudios-secondary);
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: 15px;
}

.category-count {
    background: var(--estudios-light);
    color: var(--estudios-secondary);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    display: inline-block;
}

/* =============================================================================
   PAGINACIÓN
   ============================================================================= */
.estudios-pagination {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 1px solid var(--estudios-border);
    border-radius: 12px;
    padding: 25px;
    margin-top: 30px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}

.page-numbers {
    display: inline-flex;
    gap: 5px;
    align-items: center;
    flex-wrap: wrap;
    justify-content: center;
}

.page-numbers a,
.page-numbers span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 45px;
    height: 45px;
    padding: 0 15px;
    border: 2px solid var(--estudios-border);
    border-radius: 8px;
    text-decoration: none;
    color: var(--estudios-secondary);
    font-weight: 600;
    transition: all 0.3s ease;
    background: white;
}

.page-numbers a {
    background: #fff;
}

.page-numbers a:hover {
    background: var(--estudios-primary);
    color: white;
    border-color: var(--estudios-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 124, 186, 0.3);
}

.page-numbers .current {
    background: var(--estudios-primary);
    color: white;
    border-color: var(--estudios-primary);
}

/* =============================================================================
   ESTADO SIN ESTUDIOS
   ============================================================================= */
.no-studies-found {
    background: #fff;
    border: 1px solid var(--estudios-border);
    border-radius: var(--estudios-border-radius);
    padding: 40px;
    text-align: center;
    color: var(--estudios-secondary);
    box-shadow: var(--estudios-shadow);
}

.no-studies-found p {
    font-size: 18px;
    margin: 0;
}

/* =============================================================================
   RESPONSIVE DESIGN
   ============================================================================= */
@media (max-width: 767px) {
    .estudios-archive-container,
    .single-study {
        padding: 15px;
    }
    
    .filter-bar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-bar > * {
        width: 100%;
    }
    
    .study-title {
        font-size: 16px;
    }
    
    .pdf-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .action-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .access-info ul {
        flex-direction: column;
        gap: 10px;
    }
    
    .social-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .breadcrumb-list {
        flex-wrap: wrap;
        gap: 5px;
    }
    
    .breadcrumb-separator {
        display: none;
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
}

    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .study-content {
        padding: 15px;
    }
    
    .study-extended-content {
        padding: 20px;
    }
    
    .pdf-controls {
        padding: 10px;
    }
    
    .btn-control {
        width: 100%;
        justify-content: center;
    }
}

@media (min-width: 768px) and (max-width: 991px) {
    .estudios-grid {
        gap: 20px;
    }
    
    .study-title {
        font-size: 16px;
    }
}

@media (min-width: 992px) and (max-width: 1199px) {
    .estudios-grid {
        gap: 25px;
    }
}

/* =============================================================================
   ELEMENTOR INTEGRATION
   ============================================================================= */
.elementor-studies-grid {
    display: grid !important;
    gap: 25px !important;
}

.elementor-study-card {
    height: 100%;
}

.elementor-single-study {
    max-width: 100%;
}

@media (max-width: 767px) {
    .elementor-studies-grid {
        grid-template-columns: 1fr !important;
    }
}

@media (min-width: 768px) and (max-width: 991px) {
    .elementor-studies-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
}

@media (min-width: 992px) and (max-width: 1199px) {
    .elementor-studies-grid {
        grid-template-columns: repeat(3, 1fr) !important;
    }
}

@media (min-width: 1200px) {
    .elementor-studies-grid {
        grid-template-columns: repeat(3, 1fr) !important;
    }
}

/* =============================================================================
   NOTIFICACIONES
   ============================================================================= */
.estudios-notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: #fff;
    border: 1px solid var(--estudios-border);
    border-radius: var(--estudios-border-radius);
    padding: 15px 20px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    z-index: 9999;
    max-width: 300px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.estudios-notification.show {
    transform: translateX(0);
}

.estudios-notification.success {
    border-left: 4px solid var(--estudios-success);
}

.estudios-notification.error {
    border-left: 4px solid var(--estudios-danger);
}

.estudios-notification.info {
    border-left: 4px solid var(--estudios-primary);
}

.estudios-notification p {
    margin: 0;
    font-size: 14px;
    color: var(--estudios-dark);
}

@media (max-width: 768px) {
    .estudios-notification {
        top: 10px;
        right: 10px;
        left: 10px;
        max-width: none;
        transform: translateY(-100%);
    }
    
    .estudios-notification.show {
        transform: translateY(0);
    }
}

/* =============================================================================
   FILTROS MEJORADOS
   ============================================================================= */
.estudios-filters-container {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 1px solid var(--estudios-border);
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 30px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}

.filters-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--estudios-primary);
}

.filters-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--estudios-dark);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-clear-filters {
    background: linear-gradient(135deg, var(--estudios-danger) 0%, #c82333 100%);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 2px 8px rgba(220, 53, 69, 0.3);
}

.btn-clear-filters:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(220, 53, 69, 0.4);
}

.filters-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.filter-label {
    font-weight: 600;
    color: var(--estudios-dark);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-select,
.filter-input {
    padding: 12px 16px;
    border: 2px solid var(--estudios-border);
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s ease;
    background: white;
}

.filter-select:focus,
.filter-input:focus {
    border-color: var(--estudios-primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 124, 186, 0.1);
}

.filter-select option {
    padding: 8px;
}

.search-input-group {
    display: flex;
    gap: 0;
}

.search-input-group .filter-input {
    border-right: none;
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
    flex: 1;
}

.btn-search {
    background: linear-gradient(135deg, var(--estudios-primary) 0%, #005a87 100%);
    color: white;
    border: none;
    padding: 12px 16px;
    border-radius: 0 8px 8px 0;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 50px;
    box-shadow: 0 2px 8px rgba(0, 124, 186, 0.3);
}

.btn-search:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 124, 186, 0.4);
}

/* =============================================================================
   PAGINACIÓN MEJORADA
   ============================================================================= */
.estudios-pagination {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 1px solid var(--estudios-border);
    border-radius: 12px;
    padding: 25px;
    margin-top: 30px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}

.pagination-info {
    text-align: center;
    margin-bottom: 20px;
}

.showing-text {
    font-size: 16px;
    font-weight: 600;
    color: var(--estudios-dark);
}

.pagination-links {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.pagination-links a,
.pagination-links span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 45px;
    height: 45px;
    padding: 0 15px;
    border: 2px solid var(--estudios-border);
    border-radius: 8px;
    text-decoration: none;
    color: var(--estudios-secondary);
    font-weight: 600;
    transition: all 0.3s ease;
    background: white;
}

.pagination-links a:hover {
    background: var(--estudios-primary);
    color: white;
    border-color: var(--estudios-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 124, 186, 0.3);
}

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

.load-more-container {
    margin-top: 20px;
    text-align: center;
}

.btn-load-more {
    background: linear-gradient(135deg, var(--estudios-primary) 0%, #005a87 100%);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 4px 16px rgba(0, 124, 186, 0.3);
}

.btn-load-more:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 124, 186, 0.4);
}

.btn-load-more:active {
    transform: translateY(-1px);
}

.btn-load-more i {
    font-size: 14px;
}

/* Responsive para filtros */
@media (max-width: 768px) {
    .filters-content {
        grid-template-columns: 1fr;
    }
    
    .filters-header {
        flex-direction: column;
        gap: 15px;
        align-items: stretch;
    }
    
    .btn-clear-filters {
        align-self: flex-end;
    }
    
    .estudios-pagination {
        padding: 20px;
    }
    
    .pagination-links {
        gap: 5px;
    }
    
    .pagination-links a,
    .pagination-links span {
        padding: 8px 12px;
        font-size: 14px;
    }
    
    .btn-load-more {
        padding: 12px 24px;
        font-size: 14px;
    }
}

/* =============================================================================
   MEJORAS PARA POWERPACK ELEMENTOR
   ============================================================================= */

/* Efectos de hover mejorados para tarjetas */
.estudio-card {
    position: relative;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: none;
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.estudio-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.5s;
    z-index: 1;
}

.estudio-card:hover::before {
    left: 100%;
}

.estudio-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 12px 40px rgba(0, 124, 186, 0.15);
    border-color: var(--estudios-primary);
}

/* Efectos de entrada animados */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.estudio-card:nth-child(1) { animation-delay: 0.1s; }
.estudio-card:nth-child(2) { animation-delay: 0.2s; }
.estudio-card:nth-child(3) { animation-delay: 0.3s; }
.estudio-card:nth-child(4) { animation-delay: 0.4s; }
.estudio-card:nth-child(5) { animation-delay: 0.5s; }
.estudio-card:nth-child(6) { animation-delay: 0.6s; }

/* Mejoras en las imágenes */
.study-thumbnail {
    position: relative;
    overflow: hidden;
    height: 220px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.study-thumbnail img {
    transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    filter: brightness(0.95);
}

.estudio-card:hover .study-thumbnail img {
    transform: scale(1.1) rotate(1deg);
    filter: brightness(1.05);
}

/* Badges mejorados */
.restricted-badge {
    background: linear-gradient(135deg, #dc3545 0%, #c82333 100%);
    box-shadow: 0 4px 12px rgba(220, 53, 69, 0.3);
    border-radius: 20px;
    padding: 6px 12px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Títulos con efectos */
.study-title a {
    background: linear-gradient(135deg, var(--estudios-dark) 0%, #495057 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: all 0.3s ease;
}

.estudio-card:hover .study-title a {
    background: linear-gradient(135deg, var(--estudios-primary) 0%, #005a87 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Botones mejorados */
.btn {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    font-weight: 600;
    letter-spacing: 0.3px;
    text-transform: uppercase;
    font-size: 13px;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.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;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--estudios-primary) 0%, #005a87 100%);
    box-shadow: 0 4px 15px rgba(0, 124, 186, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 124, 186, 0.4);
}

.btn-download {
    background: linear-gradient(135deg, var(--estudios-success) 0%, #008a20 100%);
    box-shadow: 0 4px 15px rgba(0, 162, 42, 0.3);
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 162, 42, 0.4);
}

.btn-preview {
    background: linear-gradient(135deg, var(--estudios-secondary) 0%, #3a3f45 100%);
    box-shadow: 0 4px 15px rgba(80, 87, 94, 0.3);
}

.btn-preview:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(80, 87, 94, 0.4);
}

/* Filtros con diseño moderno */
.estudios-filters-container {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    border: 1px solid rgba(0, 124, 186, 0.1);
    border-radius: 16px;
    padding: 30px;
    margin-bottom: 40px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
    position: relative;
    overflow: hidden;
}

.estudios-filters-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--estudios-primary), var(--estudios-success), var(--estudios-warning));
}

.filters-title {
    background: linear-gradient(135deg, var(--estudios-dark) 0%, #495057 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 24px;
    font-weight: 800;
}

.btn-clear-filters {
    background: linear-gradient(135deg, #dc3545 0%, #c82333 100%);
    border-radius: 12px;
    padding: 12px 24px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 15px rgba(220, 53, 69, 0.3);
}

.btn-clear-filters:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(220, 53, 69, 0.4);
}

/* Inputs mejorados */
.filter-select,
.filter-input {
    border: 2px solid rgba(0, 124, 186, 0.1);
    border-radius: 12px;
    padding: 14px 18px;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
}

.filter-select:focus,
.filter-input:focus {
    border-color: var(--estudios-primary);
    box-shadow: 0 0 0 4px rgba(0, 124, 186, 0.1);
    background: rgba(255, 255, 255, 1);
    transform: translateY(-1px);
}

/* Paginación mejorada */
.estudios-pagination {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    border: 1px solid rgba(0, 124, 186, 0.1);
    border-radius: 16px;
    padding: 30px;
    margin-top: 40px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
}

.pagination-links a,
.pagination-links span {
    border-radius: 12px;
    font-weight: 700;
    min-width: 50px;
    height: 50px;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: 2px solid rgba(0, 124, 186, 0.1);
}

.pagination-links a:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 124, 186, 0.3);
}

.pagination-links .current {
    background: linear-gradient(135deg, var(--estudios-primary) 0%, #005a87 100%);
    box-shadow: 0 4px 15px rgba(0, 124, 186, 0.3);
}

/* Botón "Ver más" mejorado */
.btn-load-more {
    background: linear-gradient(135deg, var(--estudios-primary) 0%, #005a87 100%);
    border-radius: 12px;
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 6px 20px rgba(0, 124, 186, 0.3);
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.btn-load-more:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(0, 124, 186, 0.4);
}

/* Categorías con efectos */
.category-tag {
    background: linear-gradient(135deg, rgba(0, 124, 186, 0.1) 0%, rgba(0, 124, 186, 0.05) 100%);
    border: 1px solid rgba(0, 124, 186, 0.2);
    border-radius: 20px;
    padding: 6px 12px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    transition: all 0.3s ease;
}

.category-tag:hover {
    background: linear-gradient(135deg, var(--estudios-primary) 0%, #005a87 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 124, 186, 0.3);
}

/* Efectos de scroll suave */
html {
    scroll-behavior: smooth;
}

/* Loading states */
.estudios-grid.loading {
    opacity: 0.6;
    pointer-events: none;
}

.estudios-grid.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 40px;
    height: 40px;
    margin: -20px 0 0 -20px;
    border: 4px solid rgba(0, 124, 186, 0.1);
    border-top: 4px solid var(--estudios-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    z-index: 1000;
}

/* Responsive mejorado */
@media (max-width: 768px) {
    .estudios-filters-container {
        padding: 20px;
        border-radius: 12px;
    }
    
    .filters-title {
        font-size: 20px;
    }
    
    .btn-load-more {
        padding: 14px 28px;
        font-size: 14px;
    }
    
    .estudio-card:hover {
        transform: translateY(-4px) scale(1.01);
    }
}

/* Efectos de partículas para PowerPack */
.pp-particles-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

/* Mejoras para modo oscuro (si el tema lo soporta) */
@media (prefers-color-scheme: dark) {
    .estudio-card {
        background: linear-gradient(135deg, #2d3748 0%, #1a202c 100%);
        border-color: rgba(255, 255, 255, 0.1);
    }
    
    .study-title a {
        background: linear-gradient(135deg, #ffffff 0%, #e2e8f0 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }
    
    .estudios-filters-container {
        background: linear-gradient(135deg, #2d3748 0%, #1a202c 100%);
        border-color: rgba(255, 255, 255, 0.1);
    }
}

/* =============================================================================
   FORMULARIO DE BÚSQUEDA DE ESTUDIOS
   ============================================================================= */
.estudios-pdf-pro-buscar-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.estudios-pdf-pro-search-form {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.estudios-pdf-pro-search-form::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="50" cy="50" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.search-studies-form {
    position: relative;
    z-index: 2;
}

.search-input-group {
    display: flex;
    max-width: 600px;
    margin: 0 auto;
    background: #fff;
    border-radius: 50px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    transition: all 0.3s ease;
}

.search-input-group:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.2);
}

.search-studies-input {
    flex: 1;
    padding: 18px 25px;
    border: none;
    outline: none;
    font-size: 16px;
    font-weight: 500;
    color: var(--estudios-dark);
    background: transparent;
}

.search-studies-input::placeholder {
    color: #9ca3af;
    font-weight: 400;
}

.search-studies-input:focus {
    background: #f8fafc;
}

.search-studies-button {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 18px 30px;
    background: linear-gradient(135deg, var(--estudios-primary) 0%, #005a87 100%);
    color: #fff;
    border: none;
    border-radius: 0 50px 50px 0;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.search-studies-button::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 ease;
}

.search-studies-button:hover::before {
    left: 100%;
}

.search-studies-button:hover {
    background: linear-gradient(135deg, #005a87 0%, var(--estudios-primary) 100%);
    transform: translateX(2px);
}

.search-studies-button:active {
    transform: translateX(2px) scale(0.98);
}

.search-icon {
    transition: transform 0.3s ease;
}

.search-studies-button:hover .search-icon {
    transform: scale(1.1);
}

/* =============================================================================
   RESULTADOS DE BÚSQUEDA
   ============================================================================= */
.estudios-pdf-pro-search-results {
    margin-top: 30px;
}

.search-results-header {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    border-left: 5px solid var(--estudios-primary);
}

.search-results-header h2 {
    margin: 0 0 10px 0;
    font-size: 28px;
    font-weight: 700;
    color: var(--estudios-dark);
    background: linear-gradient(135deg, var(--estudios-primary) 0%, #005a87 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.results-count {
    margin: 0;
    font-size: 16px;
    color: var(--estudios-secondary);
    font-weight: 500;
}

.estudios-grid-search {
    animation: fadeInUp 0.6s ease-out;
}

/* =============================================================================
   MENSAJE DE NO RESULTADOS
   ============================================================================= */
.no-results-message {
    text-align: center;
    padding: 60px 20px;
    background: #fff;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border: 2px dashed #e5e7eb;
    margin: 40px 0;
}

.no-results-icon {
    font-size: 64px;
    margin-bottom: 20px;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

.no-results-message h3 {
    margin: 0 0 15px 0;
    font-size: 24px;
    font-weight: 600;
    color: var(--estudios-dark);
}

.no-results-message p {
    margin: 0 0 25px 0;
    font-size: 16px;
    color: var(--estudios-secondary);
    line-height: 1.6;
}

.clear-search-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--estudios-secondary) 0%, #404040 100%);
    color: #fff;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.clear-search-button:hover {
    background: linear-gradient(135deg, #404040 0%, var(--estudios-secondary) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    color: #fff;
    text-decoration: none;
}

.clear-search-button::before {
    content: '↺';
    font-size: 16px;
}

/* =============================================================================
   RESPONSIVE PARA BÚSQUEDA
   ============================================================================= */
@media (max-width: 768px) {
    .estudios-pdf-pro-search-form {
        padding: 30px 15px;
        margin-bottom: 30px;
    }
    
    .search-input-group {
        flex-direction: column;
        border-radius: 15px;
        max-width: 100%;
    }
    
    .search-studies-input {
        padding: 15px 20px;
        border-radius: 15px 15px 0 0;
        text-align: center;
    }
    
    .search-studies-button {
        padding: 15px 20px;
        border-radius: 0 0 15px 15px;
        justify-content: center;
    }
    
    .search-results-header h2 {
        font-size: 22px;
    }
    
    .no-results-message {
        padding: 40px 15px;
    }
    
    .no-results-icon {
        font-size: 48px;
    }
    
    .no-results-message h3 {
        font-size: 20px;
    }
}

@media (max-width: 480px) {
    .search-input-group {
        margin: 0 10px;
    }
    
    .search-studies-input,
    .search-studies-button {
        font-size: 14px;
        padding: 12px 15px;
    }
    
    .search-results-header {
        padding: 20px 15px;
    }
    
    .search-results-header h2 {
        font-size: 20px;
    }
}

/* =============================================================================
   RESPONSIVE DESIGN PARA CATEGORÍAS DE ESTUDIOS
   ============================================================================= */

/* Grid responsive para categorías */
.responsive-categories-grid {
    display: grid;
    gap: 25px;
    margin-bottom: 40px;
}

/* Mobile First - 1 columna por defecto */
.responsive-categories-grid {
    grid-template-columns: 1fr;
}

/* Tablet (768px+) - 2 columnas por defecto */
@media (min-width: 768px) {
    .responsive-categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* Configuraciones específicas para tablet */
    .responsive-categories-grid[data-tablet-columns="1"] {
        grid-template-columns: 1fr;
    }
    
    .responsive-categories-grid[data-tablet-columns="3"] {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Desktop (992px+) - 3 columnas por defecto */
@media (min-width: 992px) {
    .responsive-categories-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    /* Configuraciones específicas para desktop */
    .responsive-categories-grid[data-columns="1"] {
        grid-template-columns: 1fr;
    }
    
    .responsive-categories-grid[data-columns="2"] {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .responsive-categories-grid[data-columns="4"] {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Configuraciones específicas para móvil */
@media (max-width: 767px) {
    .responsive-categories-grid[data-mobile-columns="2"] {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
}

/* Tarjetas de categoría responsive */
.responsive-category-card {
    background: #fff;
    border: 1px solid var(--estudios-border);
    border-radius: var(--estudios-border-radius);
    overflow: hidden;
    transition: var(--estudios-transition);
    box-shadow: var(--estudios-shadow);
    min-height: 120px;
    display: flex;
    flex-direction: column;
}

.responsive-category-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.15);
}

.responsive-category-card .category-content {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.responsive-category-card .category-name {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    line-height: 1.3;
}

.responsive-category-card .category-name a {
    color: var(--estudios-dark);
    text-decoration: none;
    transition: var(--estudios-transition);
    display: block;
    word-wrap: break-word;
}

.responsive-category-card .category-name a:hover {
    color: var(--estudios-primary);
}

.responsive-category-card .category-description {
    color: var(--estudios-secondary);
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: 15px;
    flex: 1;
    word-wrap: break-word;
}

.responsive-category-card .category-count {
    background: var(--estudios-light);
    color: var(--estudios-secondary);
    padding: 6px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    display: inline-block;
    align-self: flex-start;
    margin-top: auto;
}

/* Responsive para diferentes tamaños de pantalla */
@media (max-width: 767px) {
    .responsive-category-card .category-content {
        padding: 15px;
    }
    
    .responsive-category-card .category-name {
        font-size: 16px;
        margin-bottom: 8px;
    }
    
    .responsive-category-card .category-description {
        font-size: 13px;
        margin-bottom: 12px;
    }
    
    .responsive-category-card .category-count {
        font-size: 11px;
        padding: 4px 8px;
    }
    
    /* Ajustes para móviles muy pequeños */
    @media (max-width: 480px) {
        .responsive-category-card .category-content {
            padding: 12px;
        }
        
        .responsive-category-card .category-name {
            font-size: 15px;
        }
        
        .responsive-category-card .category-description {
            font-size: 12px;
        }
    }
}

@media (min-width: 768px) and (max-width: 991px) {
    .responsive-category-card .category-content {
        padding: 18px;
    }
    
    .responsive-category-card .category-name {
        font-size: 17px;
    }
    
    .responsive-category-card .category-description {
        font-size: 13px;
    }
}

@media (min-width: 992px) {
    .responsive-category-card .category-content {
        padding: 20px;
    }
    
    .responsive-category-card .category-name {
        font-size: 18px;
    }
    
    .responsive-category-card .category-description {
        font-size: 14px;
    }
}

/* Ajustes para pantallas muy grandes */
@media (min-width: 1200px) {
    .responsive-categories-grid {
        gap: 30px;
    }
    
    .responsive-category-card .category-content {
        padding: 25px;
    }
    
    .responsive-category-card .category-name {
        font-size: 20px;
    }
    
    .responsive-category-card .category-description {
        font-size: 15px;
    }
}

/* Mejoras de accesibilidad */
.responsive-category-card .category-name a:focus {
    outline: 2px solid var(--estudios-primary);
    outline-offset: 2px;
}

/* Animaciones suaves */
.responsive-category-card {
    animation: fadeInUp 0.6s ease-out;
}

.responsive-category-card:nth-child(1) { animation-delay: 0.1s; }
.responsive-category-card:nth-child(2) { animation-delay: 0.2s; }
.responsive-category-card:nth-child(3) { animation-delay: 0.3s; }
.responsive-category-card:nth-child(4) { animation-delay: 0.4s; }
.responsive-category-card:nth-child(5) { animation-delay: 0.5s; }
.responsive-category-card:nth-child(6) { animation-delay: 0.6s; }

/* Estados de carga */
.responsive-categories-grid.loading {
    opacity: 0.6;
    pointer-events: none;
}

.responsive-categories-grid.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 40px;
    height: 40px;
    margin: -20px 0 0 -20px;
    border: 4px solid rgba(0, 124, 186, 0.1);
    border-top: 4px solid var(--estudios-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    z-index: 1000;
}

/* Compatibilidad con modo oscuro */
@media (prefers-color-scheme: dark) {
    .responsive-category-card {
        background: linear-gradient(135deg, #2d3748 0%, #1a202c 100%);
        border-color: rgba(255, 255, 255, 0.1);
    }
    
    .responsive-category-card .category-name a {
        background: linear-gradient(135deg, #ffffff 0%, #e2e8f0 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }
    
    .responsive-category-card .category-description {
        color: #a0aec0;
    }
    
    .responsive-category-card .category-count {
        background: rgba(255, 255, 255, 0.1);
        color: #e2e8f0;
    }
}

/* =============================================================================
   WIDGET DE CATEGORÍAS RESPONSIVE
   ============================================================================= */
.responsive-categories-grid {
    display: grid;
    gap: 25px;
    margin-bottom: 40px;
    transition: all 0.3s ease;
}

/* Mobile First - 1 columna por defecto */
.responsive-categories-grid {
    grid-template-columns: 1fr;
}

/* Tablet (768px+) */
@media (min-width: 768px) {
    .responsive-categories-grid[data-tablet-columns="1"] {
        grid-template-columns: 1fr;
    }
    
    .responsive-categories-grid[data-tablet-columns="2"] {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .responsive-categories-grid[data-tablet-columns="3"] {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Desktop (992px+) */
@media (min-width: 992px) {
    .responsive-categories-grid[data-columns="1"] {
        grid-template-columns: 1fr;
    }
    
    .responsive-categories-grid[data-columns="2"] {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .responsive-categories-grid[data-columns="3"] {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .responsive-categories-grid[data-columns="4"] {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Mejoras para dispositivos móviles */
@media (max-width: 767px) {
    .responsive-categories-grid {
        gap: 20px;
        margin-bottom: 30px;
    }
    
    .category-card {
        min-height: 120px;
        display: flex;
        align-items: center;
    }
    
    .category-content {
        padding: 20px;
        width: 100%;
    }
    
    .category-name {
        font-size: 18px;
        margin-bottom: 8px;
        line-height: 1.3;
    }
    
    .category-description {
        font-size: 14px;
        line-height: 1.4;
        margin-bottom: 12px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    
    .category-count {
        font-size: 12px;
        padding: 6px 10px;
        border-radius: 6px;
        min-height: 32px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
}

/* Mejoras para tablets */
@media (min-width: 768px) and (max-width: 991px) {
    .responsive-categories-grid {
        gap: 22px;
    }
    
    .category-card {
        min-height: 140px;
    }
    
    .category-content {
        padding: 22px;
    }
    
    .category-name {
        font-size: 16px;
        margin-bottom: 10px;
    }
    
    .category-description {
        font-size: 13px;
        line-height: 1.5;
        margin-bottom: 15px;
        display: -webkit-box;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
}

/* Mejoras para desktop */
@media (min-width: 992px) {
    .responsive-categories-grid {
        gap: 25px;
    }
    
    .category-card {
        min-height: 160px;
        transition: all 0.3s ease;
    }
    
    .category-card:hover {
        transform: translateY(-4px);
        box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    }
    
    .category-content {
        padding: 25px;
    }
    
    .category-name {
        font-size: 18px;
        margin-bottom: 12px;
    }
    
    .category-description {
        font-size: 14px;
        line-height: 1.6;
        margin-bottom: 18px;
        display: -webkit-box;
        -webkit-line-clamp: 4;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    
    .category-count {
        font-size: 12px;
        padding: 8px 12px;
        border-radius: 8px;
        min-height: 36px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
}

/* Accesibilidad y usabilidad */
@media (max-width: 480px) {
    .category-card {
        min-height: 100px;
    }
    
    .category-content {
        padding: 16px;
    }
    
    .category-name {
        font-size: 16px;
        margin-bottom: 6px;
    }
    
    .category-description {
        font-size: 13px;
        margin-bottom: 10px;
        -webkit-line-clamp: 2;
    }
    
    .category-count {
        font-size: 11px;
        padding: 4px 8px;
        min-height: 28px;
    }
}

/* Efectos de hover mejorados */
.category-card {
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 124, 186, 0.05) 0%, rgba(0, 124, 186, 0.02) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.category-name a {
    position: relative;
    z-index: 2;
    display: block;
    text-decoration: none;
    color: var(--estudios-dark);
    transition: color 0.3s ease;
}

.category-card:hover .category-name a {
    color: var(--estudios-primary);
}

/* Animaciones de entrada */
.responsive-categories-grid .category-card {
    animation: fadeInUp 0.6s ease-out;
    animation-fill-mode: both;
}

.responsive-categories-grid .category-card:nth-child(1) { animation-delay: 0.1s; }
.responsive-categories-grid .category-card:nth-child(2) { animation-delay: 0.2s; }
.responsive-categories-grid .category-card:nth-child(3) { animation-delay: 0.3s; }
.responsive-categories-grid .category-card:nth-child(4) { animation-delay: 0.4s; }
.responsive-categories-grid .category-card:nth-child(5) { animation-delay: 0.5s; }
.responsive-categories-grid .category-card:nth-child(6) { animation-delay: 0.6s; }

/* Estados de carga */
.responsive-categories-grid.loading {
    opacity: 0.6;
    pointer-events: none;
}

.responsive-categories-grid.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 40px;
    height: 40px;
    margin: -20px 0 0 -20px;
    border: 4px solid rgba(0, 124, 186, 0.1);
    border-top: 4px solid var(--estudios-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    z-index: 1000;
}

/* Compatibilidad con Elementor */
.elementor-widget-estudios_pdf_categories .responsive-categories-grid {
    width: 100%;
}

.elementor-widget-estudios_pdf_categories .category-card {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.elementor-widget-estudios_pdf_categories .category-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

/* Modo oscuro */
@media (prefers-color-scheme: dark) {
    .responsive-categories-grid .category-card {
        background: linear-gradient(135deg, #2d3748 0%, #1a202c 100%);
        border-color: rgba(255, 255, 255, 0.1);
    }
    
    .responsive-categories-grid .category-name a {
        color: #e2e8f0;
    }
    
    .responsive-categories-grid .category-description {
        color: #a0aec0;
    }
    
    .responsive-categories-grid .category-count {
        background: rgba(255, 255, 255, 0.1);
        color: #e2e8f0;
    }
}