/* Research Database Styles */

.database-header {
    padding: 140px 0 60px;
    background: linear-gradient(135deg, var(--primary-dark), var(--bg-secondary));
    position: relative;
}

.search-container {
    max-width: 800px;
    margin: 48px auto 0;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 0 20px;
    transition: border-color var(--transition-base);
}

.search-box:focus-within {
    border-color: var(--accent-cyan);
}

.search-icon {
    width: 20px;
    height: 20px;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.search-box input {
    flex: 1;
    padding: 18px 16px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 16px;
    font-family: var(--font-display);
    outline: none;
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.search-clear {
    width: 32px;
    height: 32px;
    display: none;
    align-items: center;
    justify-content: center;
    background: var(--border-color);
    border: none;
    border-radius: 50%;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
    transition: all var(--transition-base);
}

.search-clear.visible {
    display: flex;
}

.search-clear:hover {
    background: var(--primary-blue);
    color: var(--text-primary);
}

/* Database Content */
.database-content {
    padding: 80px 0;
    background: var(--bg-primary);
}

.database-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 60px;
}

/* Filters Sidebar */
.filters-sidebar {
    position: sticky;
    top: 100px;
    height: fit-content;
}

.filters-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.filters-header h3 {
    font-size: 20px;
    color: var(--text-primary);
}

.reset-filters {
    background: none;
    border: none;
    color: var(--accent-cyan);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: color var(--transition-fast);
    font-family: var(--font-mono);
}

.reset-filters:hover {
    color: var(--primary-blue);
}

.filter-group {
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border-color);
}

.filter-group:last-child {
    border-bottom: none;
}

.filter-group h4 {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.filter-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.filter-checkbox,
.filter-radio {
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.filter-checkbox input,
.filter-radio input {
    width: 18px;
    height: 18px;
    margin-right: 12px;
    cursor: pointer;
    accent-color: var(--accent-cyan);
}

.filter-checkbox span:first-of-type,
.filter-radio span {
    flex: 1;
    color: var(--text-secondary);
    font-size: 14px;
    transition: color var(--transition-fast);
}

.filter-checkbox:hover span:first-of-type,
.filter-radio:hover span {
    color: var(--text-primary);
}

.filter-checkbox .count {
    font-size: 12px;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.sort-dropdown {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: var(--font-display);
    cursor: pointer;
    outline: none;
    transition: border-color var(--transition-base);
}

.sort-dropdown:focus {
    border-color: var(--accent-cyan);
}

.sort-dropdown option {
    background: var(--bg-card);
    color: var(--text-primary);
}

/* Research Main */
.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.results-header h2 {
    font-size: 24px;
    color: var(--text-primary);
}

.view-toggle {
    display: flex;
    gap: 8px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 4px;
}

.view-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.view-btn:hover {
    color: var(--text-primary);
}

.view-btn.active {
    background: var(--primary-blue);
    color: var(--text-primary);
}

.view-btn svg {
    width: 18px;
    height: 18px;
}

/* Research Grid */
.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 32px;
    margin-bottom: 60px;
}

.research-grid.list-view {
    grid-template-columns: 1fr;
}

.research-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 32px;
    transition: all var(--transition-base);
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.research-item:hover {
    transform: translateY(-4px);
    border-color: var(--accent-cyan);
    box-shadow: 0 16px 48px rgba(0, 217, 255, 0.15);
}

.list-view .research-item {
    flex-direction: row;
    gap: 32px;
}

.list-view .research-item:hover {
    transform: translateY(0);
    transform: translateX(4px);
}

.item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.list-view .item-header {
    flex-direction: column;
    gap: 8px;
}

.item-category {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 2px;
    padding: 6px 12px;
    background: rgba(0, 102, 255, 0.2);
    color: var(--accent-cyan);
    border-radius: 4px;
    text-transform: uppercase;
}

.item-date {
    font-size: 12px;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.item-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    line-height: 1.4;
}

.list-view .item-title {
    font-size: 24px;
}

.item-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
    flex: 1;
}

.item-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.item-tag {
    font-family: var(--font-mono);
    font-size: 11px;
    padding: 4px 10px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    color: var(--text-secondary);
}

.item-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.item-stats {
    display: flex;
    gap: 20px;
    font-size: 13px;
    color: var(--text-secondary);
}

.item-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--accent-cyan);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: gap var(--transition-fast);
}

.item-link:hover {
    gap: 12px;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
}

.page-btn {
    padding: 12px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 600;
    font-family: var(--font-mono);
    cursor: pointer;
    transition: all var(--transition-base);
}

.page-btn:hover:not(:disabled) {
    background: var(--primary-blue);
    border-color: var(--primary-blue);
}

.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.page-numbers {
    display: flex;
    gap: 8px;
}

.page-number {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    font-family: var(--font-mono);
    cursor: pointer;
    transition: all var(--transition-base);
}

.page-number:hover {
    color: var(--text-primary);
    border-color: var(--accent-cyan);
}

.page-number.active {
    background: var(--primary-blue);
    border-color: var(--primary-blue);
    color: var(--text-primary);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 80px 20px;
}

.empty-state h3 {
    font-size: 24px;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.empty-state p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

/* Responsive */
@media (max-width: 1024px) {
    .database-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .filters-sidebar {
        position: static;
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--card-radius);
        padding: 24px;
    }
}

@media (max-width: 768px) {
    .database-header {
        padding: 120px 0 60px;
    }
    
    .results-header {
        flex-direction: column;
        gap: 20px;
        align-items: flex-start;
    }
    
    .research-grid {
        grid-template-columns: 1fr;
    }
    
    .list-view .research-item {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .pagination {
        flex-wrap: wrap;
    }
    
    .page-numbers {
        order: -1;
        width: 100%;
        justify-content: center;
    }
}