:root {
    /* 浅色主题 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-tertiary: #94a3b8;
    
    --border-color: #e2e8f0;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #8b5cf6;
    
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1);
    
    --transition: all 0.2s ease;
}

[data-theme="dark"] {
    /* 深色主题 */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    
    --border-color: #475569;
    
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.4);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    transition: var(--transition);
    line-height: 1.6;
}

/* 导航栏 */
.navbar {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.8);
}

[data-theme="dark"] .navbar {
    background: rgba(30, 41, 59, 0.8);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo-text {
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0;
    position: relative;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-link.active {
    color: var(--primary-color);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-color);
    border-radius: 2px;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
}

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

.admin-link {
    background: linear-gradient(135deg, var(--info-color), #8b5cf6);
    color: white !important;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
}

.admin-link:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* 主内容 */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    min-height: calc(100vh - 128px);
}

.section {
    animation: fadeIn 0.3s ease;
}

.section-header {
    margin-bottom: 2rem;
    text-align: center;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* 上传卡片 */
.upload-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    margin-bottom: 2rem;
}

.upload-zone {
    padding: 4rem 2rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.upload-zone:hover {
    background: var(--bg-secondary);
}

.upload-zone.drag-over {
    background: rgba(59, 130, 246, 0.1);
    border-color: var(--primary-color);
}

.upload-icon {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.upload-zone h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.upload-hint {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.file-types, .file-limit {
    color: var(--text-tertiary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.file-input {
    display: none;
}

/* 上传设置 */
.upload-settings {
    padding: 2rem;
    background: var(--bg-secondary);
}

.setting-group {
    margin-bottom: 1.5rem;
}

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

.setting-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.input-with-presets {
    display: flex;
    gap: 0.5rem;
}

.input-with-presets input {
    flex: 1;
}

.setting-group select,
.setting-group input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: var(--transition);
}

.setting-group select:focus,
.setting-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 0.5rem;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    color: var(--text-secondary);
}

.radio-label input[type="radio"] {
    width: auto;
}

.hint {
    color: var(--text-tertiary);
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

/* 按钮样式 */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

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

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* 进度区域 */
.progress-section {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    margin-top: 2rem;
}

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

.progress-header h4 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.spin {
    animation: spin 1s linear infinite;
}

.progress-list {
    padding: 1.5rem;
}

.progress-item {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
    padding: 1.25rem;
    margin-bottom: 1rem;
    border-left: 4px solid var(--primary-color);
}

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

.progress-item.success {
    border-left-color: var(--success-color);
}

.progress-item.error {
    border-left-color: var(--danger-color);
}

.progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.file-name {
    font-weight: 500;
    max-width: 70%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-size {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.progress-bar {
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--info-color));
    border-radius: 3px;
    transition: width 0.3s ease;
    width: 0%;
}

/* 画廊样式 */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.file-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
}

.file-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.file-thumbnail {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--bg-secondary);
}

.video-thumbnail {
    position: relative;
    height: 200px;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-thumbnail i {
    font-size: 3rem;
    color: var(--primary-color);
}

.video-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0,0,0,0.7);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
}

.file-info {
    padding: 1rem;
}

.file-name-small {
    font-weight: 500;
    margin-bottom: 0.5rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-meta {
    display: flex;
    justify-content: space-between;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    grid-column: 1 / -1;
    color: var(--text-tertiary);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.load-more {
    text-align: center;
    margin-top: 2rem;
}

/* API文档样式 */
.api-docs {
    max-width: 800px;
    margin: 0 auto;
}

.api-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.api-header {
    background: var(--bg-secondary);
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.api-method {
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
}

.api-method.post {
    background: #10b981;
    color: white;
}

.api-method.get {
    background: #3b82f6;
    color: white;
}

.api-endpoint {
    font-family: 'Fira Code', monospace;
    color: var(--text-primary);
}

.api-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
}

.api-badge.public {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.api-badge.private {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.api-content {
    padding: 1.5rem;
}

.api-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.api-params {
    margin-bottom: 1.5rem;
}

.params-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 0.75rem;
}

.params-table th {
    text-align: left;
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
}

.params-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.api-example, .api-response {
    background: var(--bg-primary);
    border-radius: var(--border-radius-sm);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
    position: relative;
}

.api-example:last-child, .api-response:last-child {
    margin-bottom: 0;
}

.api-example h5, .api-response h5 {
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}

.api-example pre, .api-response pre {
    background: var(--bg-secondary);
    padding: 1rem;
    border-radius: var(--border-radius-sm);
    overflow-x: auto;
    margin: 0;
}

.api-example code, .api-response code {
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.copy-btn {
    position: absolute;
    top: 1.25rem;
    right: 1.25rem;
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    backdrop-filter: blur(4px);
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    width: 100%;
    max-width: 800px;
    max-height: 90vh;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    animation: modalIn 0.3s ease;
}

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

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 4px;
}

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

.modal-body {
    display: flex;
    max-height: calc(90vh - 74px);
}

.preview-area {
    flex: 1;
    padding: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    min-height: 400px;
    max-height: 500px;
}

.preview-area img, .preview-area video {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.file-info-panel {
    width: 300px;
    padding: 2rem;
    border-left: 1px solid var(--border-color);
    overflow-y: auto;
}

.info-row {
    margin-bottom: 1rem;
}

.info-label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
}

.info-value {
    color: var(--text-primary);
    font-weight: 500;
    word-break: break-all;
}

.url-box {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.url-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.url-input {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-family: 'Fira Code', monospace;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.format-buttons {
    display: flex;
    gap: 0.5rem;
}

/* 页脚样式 */
.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    justify-content: center;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-info {
    text-align: center;
    color: var(--text-secondary);
}

.footer-stats {
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

/* 设置面板 */
.config-panel {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    width: 400px;
    height: 100%;
    background: var(--bg-card);
    border-left: 1px solid var(--border-color);
    box-shadow: var(--shadow-xl);
    z-index: 1001;
    animation: slideInRight 0.3s ease;
}

.config-content {
    padding: 2rem;
    height: 100%;
    overflow-y: auto;
}

.config-section {
    margin-bottom: 2rem;
}

.config-section h4 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.config-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

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

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

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

@keyframes slideInRight {
    from { transform: translateX(100%); }
    to { transform: translateX(0); }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .upload-zone {
        padding: 3rem 1rem;
    }
    
    .modal-body {
        flex-direction: column;
    }
    
    .file-info-panel {
        width: 100%;
        border-left: none;
        border-top: 1px solid var(--border-color);
    }
    
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
    
    .config-panel {
        width: 100%;
    }
}

/* 工具类 */
.text-success { color: var(--success-color); }
.text-danger { color: var(--danger-color); }
.text-warning { color: var(--warning-color); }
.text-info { color: var(--info-color); }