/**
 * Frontend Styles - Scopus DOI Publications
 * 
 * @package Scopus_DOI_Publications
 */

/* ==========================================
   VARIABLES CSS
   ========================================== */
:root {
    --sdp-primary-color: #662383;
    --sdp-primary-hover: #9b39c5;
    --sdp-border-color: #ddd;
    --sdp-bg-light: #f9f9f9;
    --sdp-text-color: #333;
    --sdp-text-light: #666;
    --sdp-spacing: 20px;
    --sdp-border-radius: 4px;
}

/* ==========================================
   CONTENEDOR PRINCIPAL
   ========================================== */
.sdp-publications-frontend-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--sdp-spacing);
}

.sdp-publications-content {
    margin: var(--sdp-spacing) 0;
}

/* ==========================================
   ENCABEZADO DE PÁGINA
   ========================================== */
.page-header {
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 3px solid var(--sdp-primary-color);
}

.page-title {
    margin: 0 0 10px 0;
    color: var(--sdp-primary-color);
    font-size: 2em;
}

.page-header p {
    margin: 5px 0;
    color: var(--sdp-text-light);
}

/* ==========================================
   FILTROS
   ========================================== */
.publications-filters {
    background: var(--sdp-bg-light);
    padding: var(--sdp-spacing);
    margin: var(--sdp-spacing) 0;
    border: 1px solid var(--sdp-border-color);
    border-radius: var(--sdp-border-radius);
}

.filter-group {
    margin: 15px 0;
}

.filter-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: var(--sdp-text-color);
}

.filter-group input[type="text"],
.filter-group input[type="date"],
.filter-group select {
    width: 100%;
    max-width: 400px;
    padding: 8px 12px;
    border: 1px solid var(--sdp-border-color);
    border-radius: var(--sdp-border-radius);
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.filter-group input[type="text"]:focus,
.filter-group input[type="date"]:focus,
.filter-group select:focus {
    outline: none;
    border-color: var(--sdp-primary-color);
    box-shadow: 0 0 0 1px var(--sdp-primary-color);
}

.filter-group small {
    display: block;
    color: var(--sdp-text-light);
    margin-top: 3px;
    font-size: 12px;
}

/* ==========================================
   FILTROS AVANZADOS
   ========================================== */
.advanced-filters-toggle {
    margin: 15px 0;
}

.toggle-filters-btn {
    background: var(--sdp-primary-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: var(--sdp-border-radius);
    cursor: pointer;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: background 0.3s ease;
}

.toggle-filters-btn:hover {
    background: var(--sdp-primary-hover);
}

.toggle-filters-btn .toggle-icon {
    font-size: 12px;
    transition: transform 0.3s ease;
}

.toggle-filters-btn.active .toggle-icon {
    transform: rotate(180deg);
}

.advanced-filters-container {
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.3s ease;
    max-height: 0;
    opacity: 0;
}

.advanced-filters-container.show {
    max-height: 2000px;
    opacity: 1;
}

.advanced-filters-container h3 {
    margin: 15px 0 10px 0;
    color: var(--sdp-text-color);
}

.filter-dates {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.date-filter {
    flex: 1;
    min-width: 250px;
}

/* ==========================================
   ACCIONES DE FILTROS
   ========================================== */
.filter-actions {
    margin-top: 20px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.filter-actions button,
.filter-actions a {
    padding: 10px 20px;
    border: none;
    border-radius: var(--sdp-border-radius);
    cursor: pointer;
    font-size: 14px;
    text-decoration: none;
    display: inline-block;
    transition: background 0.3s ease;
}

.filter-actions button {
    background: var(--sdp-primary-color);
    color: white;
}

.filter-actions button:hover {
    background: var(--sdp-primary-hover);
}

.filter-actions a {
    background: #ddd;
    color: var(--sdp-text-color);
}

.filter-actions a:hover {
    background: #ccc;
}

/* ==========================================
   RESULTADOS DE PUBLICACIONES
   ========================================== */
.publications-results {
    margin-top: 30px;
}

.publications-year-group {
    margin-bottom: 40px;
}

.year-heading {
    margin: 40px 0 20px 0;
    padding-bottom: 10px;
    border-bottom: 3px solid var(--sdp-primary-color);
    color: var(--sdp-primary-color);
    font-size: 1.8em;
}

/* ==========================================
   ITEM DE PUBLICACIÓN
   ========================================== */
.publication-item {
    padding: var(--sdp-spacing);
    margin: var(--sdp-spacing) 0;
    border: 1px solid var(--sdp-border-color);
    background: white;
    border-radius: var(--sdp-border-radius);
    transition: box-shadow 0.3s ease;
}

.publication-item:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.publication-title {
    margin-top: 0;
    margin-bottom: 15px;
    font-size: 1.3em;
    line-height: 1.4;
}

.publication-title a {
    color: var(--sdp-primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.publication-title a:hover {
    color: var(--sdp-primary-hover);
    text-decoration: underline;
}

.publication-item p {
    margin: 8px 0;
    line-height: 1.6;
    color: var(--sdp-text-color);
}

.publication-item p strong {
    color: var(--sdp-text-color);
    font-weight: 600;
}

.publication-authors,
.publication-journal,
.publication-date,
.publication-doi {
    font-size: 14px;
}

.publication-doi a {
    color: var(--sdp-primary-color);
    text-decoration: none;
}

.publication-doi a:hover {
    text-decoration: underline;
}

.publication-excerpt {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #eee;
    color: var(--sdp-text-light);
    font-size: 14px;
    line-height: 1.6;
}

/* ==========================================
   PAGINACIÓN
   ========================================== */
.publications-pagination {
    margin: 30px 0;
    text-align: center;
}

.pagination-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 5px;
    flex-wrap: wrap;
}

.publications-pagination a,
.publications-pagination span {
    padding: 8px 12px;
    border: 1px solid var(--sdp-border-color);
    background: white;
    text-decoration: none;
    color: var(--sdp-primary-color);
    display: inline-block;
    min-width: 40px;
    text-align: center;
    border-radius: var(--sdp-border-radius);
    transition: all 0.3s ease;
}

.publications-pagination a:hover {
    background: var(--sdp-bg-light);
    border-color: var(--sdp-primary-color);
}

.publications-pagination .current-page {
    background: var(--sdp-primary-color);
    color: white;
    border-color: var(--sdp-primary-color);
    font-weight: bold;
}

.publications-pagination .prev-page,
.publications-pagination .next-page {
    font-weight: bold;
}

.publications-pagination .dots {
    padding: 8px 12px;
    color: var(--sdp-text-light);
    border: none;
}

/* ==========================================
   MENSAJES
   ========================================== */
.publications-results > p {
    padding: var(--sdp-spacing);
    background: var(--sdp-bg-light);
    border: 1px solid var(--sdp-border-color);
    border-radius: var(--sdp-border-radius);
    text-align: center;
    color: var(--sdp-text-light);
}

/* ==========================================
   RESPONSIVE
   ========================================== */
@media (max-width: 768px) {
    .sdp-publications-frontend-page {
        padding: 10px;
    }
    
    .filter-dates {
        flex-direction: column;
    }
    
    .filter-group input[type="text"],
    .filter-group input[type="date"],
    .filter-group select {
        max-width: 100%;
    }
    
    .publication-item {
        padding: 15px;
    }
    
    .publication-title {
        font-size: 1.1em;
    }
    
    .filter-actions {
        flex-direction: column;
    }
    
    .filter-actions button,
    .filter-actions a {
        width: 100%;
        text-align: center;
    }
    
    .pagination-links {
        gap: 3px;
    }
    
    .publications-pagination a,
    .publications-pagination span {
        padding: 6px 10px;
        min-width: 35px;
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 1.5em;
    }
    
    .year-heading {
        font-size: 1.4em;
    }
    
    .publication-title {
        font-size: 1em;
    }
}

/* ==========================================
   ANIMACIONES
   ========================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.publication-item {
    animation: fadeIn 0.3s ease;
}

/* ==========================================
   ACCESIBILIDAD
   ========================================== */
.filter-actions button:focus,
.toggle-filters-btn:focus,
.publications-pagination a:focus {
    outline: 2px solid var(--sdp-primary-color);
    outline-offset: 2px;
}

/* Mejorar contraste para lectores de pantalla */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ============================================================================
   ESTILOS PARA KEYWORDS
   ============================================================================ */

.keyword-link {
    color: #0073aa;
    text-decoration: none;
    border-bottom: 1px dotted #0073aa;
    padding: 2px 0;
    margin: 0 3px;
    transition: all 0.2s ease;
}

.keyword-link:hover {
    color: #005177;
    border-bottom-style: solid;
}

/* ==========================================
   SHORTCODE DE PUBLICACIÓN MODO MINIMAL
   ========================================== */

.sdp-minimal-mode .publications-results {
    margin-top: 0;
}

.sdp-minimal-mode .publication-item {
    padding: 10px;
}

.sdp-minimal-mode .publication-item h3 {
    padding: 1rem 1rem 0 0;
    line-height: 2rem;
}

.sdp-minimal-mode .publication-item p {
    margin: 0;
}