/* CSS Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS Variables for Theming */
:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #7c3aed;
    --success-color: #059669;
    --warning-color: #d97706;
    --danger-color: #dc2626;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-overlay: rgba(0, 0, 0, 0.5);
    
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-tertiary: #94a3b8;
    
    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    --transition: all 0.2s ease-in-out;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-overlay: rgba(0, 0, 0, 0.7);
    
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    
    --border-color: #334155;
    --border-hover: #475569;
}

/* Base Styles */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

/* Logo样式 */
.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    width: 3rem;
    height: 3rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
}

.logo-icon i {
    color: white;
    font-size: 1.5rem;
}

.logo-text {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.logo h1 {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
    line-height: 1.1;
}

.logo-subtitle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.english-name {
    font-weight: 600;
    color: var(--primary-color);
    font-family: 'Segoe UI', Arial, sans-serif;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.separator {
    color: var(--text-tertiary);
    font-weight: 300;
}

.chinese-desc {
    color: var(--text-tertiary);
    font-weight: 400;
}

.header-controls {
    display: flex;
    gap: 0.5rem;
}

.theme-toggle,
.settings-btn {
    width: 2.75rem;
    height: 2.75rem;
    border: none;
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    position: relative;
}

.theme-toggle:hover,
.settings-btn:hover {
    background: var(--border-hover);
    color: var(--text-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Search Section */
.search-section {
    margin-bottom: 2rem;
}

.search-container {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.search-input-wrapper {
    position: relative;
    margin-bottom: 1.5rem;
}

#searchInput {
    width: 100%;
    padding: 1.25rem 3.5rem 1.25rem 1.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 1.125rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: var(--transition);
}

#searchInput:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.clear-btn {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 2.25rem;
    height: 2.25rem;
    border: none;
    background: none;
    color: var(--text-tertiary);
    cursor: pointer;
    border-radius: var(--radius-md);
    display: none;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.clear-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.search-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.search-btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
    min-width: 160px;
    justify-content: center;
}

.search-btn.primary {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-md);
}

.search-btn.primary:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.search-btn.secondary {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.search-btn.secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

.search-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* Quick Links Section */
.quick-links-section {
    margin-bottom: 2rem;
}

.quick-links-header {
    margin-bottom: 1rem;
}

.quick-links-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.quick-links-header i {
    color: var(--primary-color);
}

.quick-links-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
    max-width: 100%;
}

.quick-link-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
    cursor: pointer;
}

.quick-link-item:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: var(--text-primary);
}

.quick-link-icon {
    width: 2.5rem;
    height: 2.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.quick-link-icon i {
    color: white;
    font-size: 1.25rem;
}

.quick-link-name {
    font-size: 0.875rem;
    font-weight: 500;
    text-align: center;
    line-height: 1.2;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Categories Section */
.categories-section {
    margin-bottom: 3rem;
}

.categories-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    gap: 1rem;
}

.tabs-container {
    flex: 1;
}

.tabs-wrapper {
    display: flex;
    gap: 0.25rem;
    background: var(--bg-tertiary);
    padding: 0.25rem;
    border-radius: var(--radius-lg);
    overflow-x: auto;
    scrollbar-width: none;
}

.tabs-wrapper::-webkit-scrollbar {
    display: none;
}

.category-tab {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    min-width: fit-content;
}

.category-tab:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.category-tab.active {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-sm);
}

.category-tab .tab-count {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.category-tab:not(.active) .tab-count {
    background: var(--bg-secondary);
    color: var(--text-tertiary);
}

.category-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.btn-small {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
}

.btn-small:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.collapse-toggle {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.collapse-toggle:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.collapse-toggle.collapsed i {
    transform: rotate(180deg);
}

.categories-content {
    transition: var(--transition);
    overflow: hidden;
}

.categories-content.collapsed {
    max-height: 0;
    opacity: 0;
    margin-bottom: 0;
}

.sites-container {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.sites-grid {
    padding: 1.5rem;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.75rem;
}

.site-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
    background: var(--bg-primary);
}

.site-item:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-color);
    transform: translateY(-1px);
}

.site-item.selected {
    background: rgba(37, 99, 235, 0.1);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.site-checkbox {
    width: 1.125rem;
    height: 1.125rem;
    accent-color: var(--primary-color);
    cursor: pointer;
}

.site-name {
    font-size: 0.9rem;
    font-weight: 500;
    user-select: none;
}

/* History Section */
.history-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.history-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
}

.history-header i {
    color: var(--primary-color);
}

.clear-history-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.clear-history-btn:hover {
    background: var(--danger-color);
    border-color: var(--danger-color);
    color: white;
}

.history-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.history-item {
    padding: 0.5rem 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.875rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.history-item:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

.history-item .remove-btn {
    width: 1rem;
    height: 1rem;
    border: none;
    background: none;
    color: var(--text-tertiary);
    cursor: pointer;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    transition: var(--transition);
}

.history-item .remove-btn:hover {
    background: var(--danger-color);
    color: white;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-overlay);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(8px);
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    overflow: hidden;
    animation: modalSlideIn 0.3s ease-out;
    border: 1px solid var(--border-color);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-header i {
    color: var(--primary-color);
}

.modal-close {
    width: 2.25rem;
    height: 2.25rem;
    border: none;
    background: none;
    color: var(--text-tertiary);
    cursor: pointer;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
    max-height: 60vh;
    overflow-y: auto;
}

.setting-item {
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.setting-item:last-child {
    margin-bottom: 0;
    border-bottom: none;
    padding-bottom: 0;
}

.setting-item label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.95rem;
    cursor: pointer;
    width: 100%;
}

.setting-item label i {
    color: var(--primary-color);
    width: 1.25rem;
    text-align: center;
}

.setting-item label span {
    flex: 1;
}

.setting-item input[type="checkbox"] {
    width: 1.25rem;
    height: 1.25rem;
    accent-color: var(--primary-color);
    cursor: pointer;
}

.setting-item input[type="number"] {
    width: 80px;
    padding: 0.375rem 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.875rem;
}

.setting-item select {
    width: 120px;
    padding: 0.375rem 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
}

.setting-item select:focus,
.setting-item input[type="number"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-shadow);
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-overlay);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    backdrop-filter: blur(8px);
}

.loading-overlay.show {
    display: flex;
}

.loading-spinner {
    text-align: center;
    color: white;
}

.spinner-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: pulse 2s infinite;
}

.loading-spinner p {
    font-size: 1.1rem;
    font-weight: 500;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Hidden State */
.hidden {
    display: none !important;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .categories-header {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }
    
    .tabs-wrapper {
        justify-content: center;
    }
    
    .category-actions {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .header {
        margin-bottom: 1.5rem;
    }
    
    .logo h1 {
        font-size: 1.5rem;
    }
    
    .logo-subtitle {
        font-size: 0.75rem;
    }
    
    .english-name {
        font-size: 0.75rem;
    }
    
    .search-container {
        padding: 1.5rem;
    }
    
    .search-actions {
        flex-direction: column;
    }
    
    .search-btn {
        width: 100%;
        min-width: auto;
    }
    
    .sites-grid {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }

    .quick-links-container {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
        gap: 0.75rem;
    }

    .quick-link-item {
        padding: 0.75rem;
    }

    .quick-link-icon {
        width: 2rem;
        height: 2rem;
    }

    .quick-link-icon i {
        font-size: 1rem;
    }

    .quick-link-name {
        font-size: 0.8rem;
    }
    
    .tabs-wrapper {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .category-tab {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
    
    .modal-content {
        width: 95%;
        margin: 20px;
    }
    
    .history-list {
        flex-direction: column;
    }
    
    .history-item {
        justify-content: space-between;
    }
}

@media (max-width: 480px) {
    .logo {
        gap: 0.5rem;
    }
    
    .logo-icon {
        width: 2.5rem;
        height: 2.5rem;
    }
    
    .logo h1 {
        font-size: 1.5rem;
    }
    
    .category-actions {
        flex-wrap: wrap;
    }
    
    .btn-small,
    .collapse-toggle {
        font-size: 0.8rem;
        padding: 0.375rem 0.75rem;
    }
}

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

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
    background: var(--border-hover);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* Focus Management */
.focus-outline {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-secondary: #000000;
    }
    
    [data-theme="dark"] {
        --border-color: #ffffff;
        --text-secondary: #ffffff;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .spinner-icon {
        animation: none;
    }
}