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

:root {
    --primary-color: #1677ff;
    --primary-hover: #4096ff;
    --primary-active: #0958d9;
    --success-color: #52c41a;
    --warning-color: #faad14;
    --error-color: #ff4d4f;
    --text-primary: #1f1f1f;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #fafafa;
    --border-color: #e8e8e8;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --transition: all 0.2s ease;
    --sidebar-width: 200px;
    --header-height: 64px;
}

body.dark-mode {
    --primary-color: #1677ff;
    --primary-hover: #4096ff;
    --primary-active: #3c89e8;
    --text-primary: #e8e8e8;
    --text-secondary: #a0a0a0;
    --text-tertiary: #666666;
    --bg-primary: #141414;
    --bg-secondary: #1f1f1f;
    --bg-tertiary: #2a2a2a;
    --border-color: #303030;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    min-height: 100vh;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.5;
}

.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    position: relative;
}

.app-container::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-image);
    background-size: cover;
    background-position: center;
    z-index: 0;
    opacity: 1;
    pointer-events: none;
}

.app-container::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-secondary);
    z-index: 1;
    opacity: var(--overlay-opacity, 0.85);
    pointer-events: none;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.header-inner {
    max-width: 1440px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    gap: 24px;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.logo-icon {
    width: 36px;
    height: 36px;
}

.toolbox-svg {
    width: 100%;
    height: 100%;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.5px;
}

.search-container {
    flex: 1;
    max-width: 600px;
}

.search-box {
    display: flex;
    align-items: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: visible;
    transition: var(--transition);
}

.search-engine-selector {
    position: relative;
    display: flex;
    align-items: center;
    padding: 0 14px;
    height: 42px;
    background: var(--primary-color);
    color: white;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    gap: 6px;
    transition: var(--transition);
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.search-engine-selector:hover {
    background: var(--primary-hover);
}

.dropdown-icon {
    width: 12px;
    height: 12px;
    transition: transform 0.2s;
}

.engine-dropdown {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    min-width: 100%;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: none;
    z-index: 1001;
    overflow: hidden;
}

.engine-dropdown.show {
    display: block;
}

.engine-option {
    padding: 10px 14px;
    font-size: 14px;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
}

.engine-option:hover {
    background: var(--bg-secondary);
}

.engine-option.active {
    color: var(--primary-color);
    background: rgba(22, 119, 255, 0.08);
}

.search-box input {
    flex: 1;
    border: none;
    outline: none;
    padding: 0 16px;
    height: 42px;
    font-size: 14px;
    background: transparent;
    color: var(--text-primary);
}

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

.search-btn {
    width: 42px;
    height: 42px;
    border: none;
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition);
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

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

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

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

.action-btn:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
}

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

.main-layout {
    display: flex;
    margin-top: var(--header-height);
    min-height: calc(100vh - var(--header-height));
    position: relative;
    z-index: 2;
    flex: 1;
}

.sidebar {
    width: var(--sidebar-width);
    flex-shrink: 0;
    padding: 20px 16px;
    position: fixed;
    top: var(--header-height);
    left: 0;
    bottom: 0;
    overflow-y: auto;
    background: var(--bg-primary);
    border-right: 1px solid var(--border-color);
    z-index: 10;
}

.sidebar-section {
    margin-bottom: 20px;
}

.sidebar-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
    padding: 0 8px;
}

.sidebar-title svg {
    width: 14px;
    height: 14px;
}

.quick-access {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.quick-access-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
}

.quick-access-item:hover {
    background: var(--bg-secondary);
}

.quick-access-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
    color: white;
    flex-shrink: 0;
    background: var(--bg-secondary);
}

.quick-favicon {
    width: 20px;
    height: 20px;
    object-fit: contain;
    border-radius: 2px;
}

.quick-fallback {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: inherit;
    font-size: 13px;
    font-weight: 600;
    color: white;
}

.quick-access-name {
    font-size: 13px;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 12px 24px;
    min-width: 0;
    min-height: calc(100vh - var(--header-height));
    position: relative;
    z-index: 5;
}

.main-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    background: var(--bg-secondary);
    z-index: 20;
    padding-top: 4px;
}

.nav-tabs {
    display: flex;
    gap: 4px;
}

.nav-tab {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

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

.nav-tab.active {
    background: var(--primary-color);
    color: white;
}

.nav-tab svg {
    width: 16px;
    height: 16px;
}

.add-site-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: 1px dashed var(--border-color);
    background: transparent;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.add-site-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(22, 119, 255, 0.04);
}

.add-site-btn svg {
    width: 14px;
    height: 14px;
}

.content-area {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.scene-section {
    display: none;
}

.scene-section.active {
    display: block;
}

.scene-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
}

.scene-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 16px;
    cursor: pointer;
    transition: var(--transition);
}

.scene-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.scene-card-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
}

.scene-card-icon svg {
    width: 20px;
    height: 20px;
}

.scene-card-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.scene-card-count {
    font-size: 12px;
    color: var(--text-tertiary);
}

.sites-section {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 20px;
    border: 1px solid var(--border-color);
    position: relative;
    z-index: 4;
}

.sites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 16px;
}

.site-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 12px 8px;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.site-item:hover {
    background: var(--bg-secondary);
}

.site-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 600;
    color: white;
    margin-bottom: 8px;
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    background: var(--bg-secondary);
}

.site-favicon {
    width: 32px;
    height: 32px;
    object-fit: contain;
    border-radius: 4px;
}

.site-fallback {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: inherit;
    font-size: 18px;
    font-weight: 600;
    color: white;
}

.site-icon.circle {
    border-radius: 50%;
}

.site-icon.circle .site-fallback {
    border-radius: 50%;
}

.site-icon.square {
    border-radius: var(--radius-sm);
}

.site-item:hover .site-icon {
    transform: scale(1.08);
    box-shadow: var(--shadow-md);
}

.site-name {
    font-size: 12px;
    color: var(--text-primary);
    text-align: center;
    max-width: 72px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.site-actions {
    position: absolute;
    top: 4px;
    right: 4px;
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: var(--transition);
}

.site-item:hover .site-actions {
    opacity: 1;
}

.site-action-btn {
    width: 20px;
    height: 20px;
    border: none;
    border-radius: 50%;
    font-size: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.site-action-btn.favorite {
    background: var(--warning-color);
    color: white;
}

.site-action-btn.favorite.active {
    background: var(--warning-color);
}

.site-action-btn.delete {
    background: var(--error-color);
    color: white;
}

.footer {
    margin-left: var(--sidebar-width);
    padding: 16px 24px;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 5;
}

.footer-links {
    display: flex;
    gap: 16px;
}

.footer-links a {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-links a svg {
    width: 14px;
    height: 14px;
}

.footer-brand {
    font-size: 12px;
    color: var(--text-tertiary);
}

.settings-panel,
.hot-panel {
    position: fixed;
    top: 0;
    right: -360px;
    width: 360px;
    height: 100vh;
    background: var(--bg-primary);
    box-shadow: var(--shadow-lg);
    transition: right 0.3s ease;
    z-index: 200;
    overflow-y: auto;
}

.settings-panel.open,
.hot-panel.open {
    right: 0;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 10;
}

.panel-header h2 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.close-btn {
    width: 28px;
    height: 28px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

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

.close-btn svg {
    width: 16px;
    height: 16px;
}

.panel-content {
    padding: 20px;
}

.settings-section {
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.settings-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.settings-section h3 {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.setting-item:last-child {
    margin-bottom: 0;
}

.setting-item label {
    font-size: 13px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.setting-item select {
    padding: 6px 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 13px;
    background: var(--bg-primary);
    color: var(--text-primary);
    outline: none;
}

.setting-item input[type="range"] {
    width: 100px;
    accent-color: var(--primary-color);
}

.setting-item input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--primary-color);
}

.setting-item input[type="file"] {
    font-size: 12px;
}

.setting-item input[type="color"] {
    width: 32px;
    height: 24px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.btn-primary,
.btn-secondary {
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

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

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

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

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

.btn-full {
    width: 100%;
}

.hot-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.hot-tab {
    padding: 6px 14px;
    border: none;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.hot-tab:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.hot-tab.active {
    background: var(--primary-color);
    color: white;
}

.hot-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.hot-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
}

.hot-item:hover {
    background: var(--border-color);
}

.hot-rank {
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    background: var(--border-color);
    color: var(--text-secondary);
}

.hot-item:nth-child(1) .hot-rank {
    background: linear-gradient(135deg, #ff4d4f, #ff7875);
    color: white;
}

.hot-item:nth-child(2) .hot-rank {
    background: linear-gradient(135deg, #fa8c16, #ffa940);
    color: white;
}

.hot-item:nth-child(3) .hot-rank {
    background: linear-gradient(135deg, #fadb14, #ffec3d);
    color: var(--text-primary);
}

.hot-title {
    flex: 1;
    font-size: 13px;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.hot-heat {
    font-size: 11px;
    color: var(--text-tertiary);
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.45);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 300;
}

.modal.open {
    display: flex;
}

.modal-content {
    background: var(--bg-primary);
    padding: 24px;
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 400px;
    position: relative;
    box-shadow: var(--shadow-lg);
    animation: modalIn 0.2s ease;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(-10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-content .close-btn {
    position: absolute;
    top: 16px;
    right: 16px;
    background: var(--bg-secondary);
}

.modal-content h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    background: var(--bg-primary);
    color: var(--text-primary);
    outline: none;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(22, 119, 255, 0.1);
}

.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-primary);
    color: var(--bg-primary);
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-size: 13px;
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 400;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

@media (max-width: 1024px) {
    .sidebar {
        display: none;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .footer {
        margin-left: 0;
    }
}

@media (max-width: 768px) {
    .header-inner {
        padding: 0 16px;
    }
    
    .logo-text {
        display: none;
    }
    
    .search-container {
        max-width: none;
    }
    
    .main-content {
        padding: 16px;
    }
    
    .main-nav {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }
    
    .nav-tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .nav-tab {
        flex-shrink: 0;
    }
    
    .add-site-btn {
        justify-content: center;
    }
    
    .sites-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 12px;
    }
    
    .site-icon {
        width: 44px;
        height: 44px;
        font-size: 16px;
    }
    
    .footer {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
    
    .settings-panel,
    .hot-panel {
        width: 100%;
        right: -100%;
    }
}

@media (max-width: 480px) {
    .sites-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .site-icon {
        width: 40px;
        height: 40px;
        font-size: 14px;
    }
    
    .site-name {
        font-size: 11px;
    }
}

::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

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