/* Search System Styles */

.search-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.search-box {
    display: flex;
    align-items: center;
    gap: 12px;
    background: white;
    border: 2px solid var(--line, #e2e8f0);
    border-radius: 12px;
    padding: 12px 16px;
    transition: all 0.2s;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.search-box:focus-within {
    border-color: var(--accent, #6366f1);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.15);
}

.search-icon {
    width: 20px;
    height: 20px;
    color: var(--muted, #64748b);
    flex-shrink: 0;
}

.search-input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 1rem;
    color: var(--ink, #0f172a);
    background: transparent;
}

.search-input::placeholder {
    color: var(--muted, #64748b);
}

.filter-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--soft, #f8fafc);
    border: 1px solid var(--line, #e2e8f0);
    border-radius: 8px;
    color: var(--ink, #0f172a);
    font-weight: 500;
    font-size: 0.925rem;
    cursor: pointer;
    transition: all 0.15s;
    flex-shrink: 0;
}

.filter-toggle svg {
    width: 16px;
    height: 16px;
}

.filter-toggle:hover {
    background: var(--accent-light, #e0e7ff);
    border-color: var(--accent, #6366f1);
    color: var(--accent, #6366f1);
}

/* Filters Panel */
.filters-panel {
    margin-top: 16px;
    padding: 20px;
    background: white;
    border: 1px solid var(--line, #e2e8f0);
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.filters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 16px;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.filter-group label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--ink, #0f172a);
}

.filter-group select {
    padding: 10px 12px;
    border: 1px solid var(--line, #e2e8f0);
    border-radius: 8px;
    font-size: 0.925rem;
    color: var(--ink, #0f172a);
    background: white;
    cursor: pointer;
    transition: all 0.15s;
}

.filter-group select:hover {
    border-color: var(--accent, #6366f1);
}

.filter-group select:focus {
    outline: none;
    border-color: var(--accent, #6366f1);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Filter Actions */
.filter-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
    border-top: 1px solid var(--line, #e2e8f0);
}

.btn-clear-filters {
    padding: 8px 16px;
    background: transparent;
    border: 1px solid var(--line, #e2e8f0);
    border-radius: 8px;
    color: var(--muted, #64748b);
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.15s;
}

.btn-clear-filters:hover {
    background: var(--soft, #f8fafc);
    border-color: var(--ink, #0f172a);
    color: var(--ink, #0f172a);
}

.filter-count {
    font-size: 0.875rem;
    color: var(--muted, #64748b);
}

/* Search Results */
.search-results {
    position: relative;
    margin-top: 16px;
    background: white;
    border: 1px solid var(--line, #e2e8f0);
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    max-height: 600px;
    overflow-y: auto;
}

.results-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--line, #e2e8f0);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--muted, #64748b);
    background: var(--soft, #f8fafc);
    border-radius: 12px 12px 0 0;
}

.results-list {
    padding: 8px;
}

.search-result-item {
    display: flex;
    gap: 12px;
    padding: 12px;
    border-radius: 8px;
    text-decoration: none;
    color: var(--ink, #0f172a);
    transition: all 0.15s;
}

.search-result-item:hover {
    background: var(--soft, #f8fafc);
}

.result-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--soft, #f8fafc);
    border-radius: 8px;
}

.result-content {
    flex: 1;
    min-width: 0;
}

.result-content h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--ink, #0f172a);
}

.result-content h4 mark {
    background: rgba(255, 235, 59, 0.4);
    padding: 2px 4px;
    border-radius: 3px;
}

.result-content p {
    font-size: 0.875rem;
    color: var(--muted, #64748b);
    margin-bottom: 8px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.result-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 500;
    white-space: nowrap;
}

.badge-subject {
    background: var(--accent-light, #e0e7ff);
    color: var(--accent, #6366f1);
}

.badge-time {
    background: rgba(34, 197, 94, 0.1);
    color: #16a34a;
}

.badge-beginner {
    background: rgba(34, 197, 94, 0.1);
    color: #16a34a;
}

.badge-intermediate {
    background: rgba(251, 191, 36, 0.2);
    color: #d97706;
}

.badge-advanced {
    background: rgba(239, 68, 68, 0.1);
    color: #dc2626;
}

/* No Results */
.no-results {
    padding: 60px 20px;
    text-align: center;
    color: var(--muted, #64748b);
}

.no-results svg {
    width: 48px;
    height: 48px;
    margin: 0 auto 16px;
    opacity: 0.3;
}

.no-results p {
    font-size: 1.1rem;
    margin-bottom: 16px;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .search-box {
        flex-wrap: wrap;
    }

    .search-input {
        min-width: 100%;
        order: -1;
    }

    .filter-toggle {
        flex: 1;
    }

    .filters-grid {
        grid-template-columns: 1fr;
    }

    .filter-actions {
        flex-direction: column;
        gap: 12px;
        align-items: stretch;
    }

    .btn-clear-filters {
        width: 100%;
        justify-content: center;
    }

    .search-results {
        max-height: 400px;
    }
}

/* Loading State */
.search-results.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
}

.search-results.loading::after {
    content: '';
    width: 40px;
    height: 40px;
    border: 3px solid var(--line, #e2e8f0);
    border-top-color: var(--accent, #6366f1);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}