/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS变量定义 - 白天/黑夜模式 */
:root {
    /* 白天模式颜色 */
    --primary-color: #1e3a8a;
    --primary-light: #3b82f6;
    --primary-dark: #1e40af;
    --secondary-color: #64748b;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --background-color: #f8fafc;
    --surface-color: #ffffff;
    --border-color: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

/* 黑夜模式颜色 */
[data-theme="dark"] {
    --primary-color: #3b82f6;
    --primary-light: #60a5fa;
    --primary-dark: #2563eb;
    --secondary-color: #94a3b8;
    --accent-color: #fbbf24;
    --success-color: #34d399;
    --warning-color: #fbbf24;
    --danger-color: #f87171;
    --background-color: #0f172a;
    --surface-color: #1e293b;
    --border-color: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.4);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.5), 0 4px 6px -4px rgb(0 0 0 / 0.5);
}

/* 基础样式 */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* 头部样式 */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 60px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex: 1;
    min-width: 0;
}

.logo i {
    font-size: 2rem;
    color: var(--accent-color);
    flex-shrink: 0;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-shrink: 0;
    max-width: 50%;
}

/* 按钮样式 */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background-color: #d97706;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

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

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

.btn-danger:hover {
    background-color: #dc2626;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* 视图切换按钮 */
.view-toggle {
    display: flex;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: 0.25rem;
}

.view-btn {
    padding: 0.5rem;
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.7);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.view-btn:hover {
    color: white;
    background-color: rgba(255, 255, 255, 0.1);
}

.view-btn.active {
    background-color: var(--accent-color);
    color: white;
}

/* 主要内容区域 */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* 面包屑导航样式 */
.breadcrumb-container {
    margin-bottom: 15px;
}

.breadcrumb {
    padding: 10px 15px;
    background: var(--surface-color);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    font-size: 14px;
}

.breadcrumb-item {
    color: var(--primary-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.breadcrumb-item:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.breadcrumb .fas {
    margin: 0 8px;
    color: var(--text-muted);
    font-size: 12px;
}

/* 工具栏 */
.toolbar {
    background-color: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.toolbar-center {
    flex: 1;
    display: flex;
    justify-content: center;
}

.download-stats {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--background-color);
    border-radius: 6px;
    border: 1px solid var(--border-color);
    font-size: 14px;
    color: var(--text-secondary);
}

.download-stats i {
    color: var(--primary-light);
    font-size: 16px;
}

/* 主题切换按钮 */
.theme-switch {
    margin-right: 15px;
}

.btn-theme {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-secondary);
    font-size: 16px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-theme:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
    transform: scale(1.05);
}

.btn-theme i {
    transition: transform 0.3s ease;
}

/* 语言切换按钮 */
.language-switch {
    margin-right: 15px;
}

.btn-language {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-language:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
}

.btn-language i {
    font-size: 16px;
    color: var(--accent-color);
}

.toolbar-left,
.toolbar-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* 搜索框 */
.search-box {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
    max-width: 300px;
    min-width: 200px;
}

.search-box i {
    position: absolute;
    left: 1rem;
    color: var(--text-muted);
    z-index: 1;
    pointer-events: none;
}

.search-box input {
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    width: 100%;
    transition: all var(--transition-fast);
    box-sizing: border-box;
}

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

/* 下拉选择框 */
select {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    background-color: var(--surface-color);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

/* 文件容器 */
.file-container {
    background-color: var(--surface-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    min-height: 400px;
    position: relative;
}

/* 加载动画 */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 400px;
    color: var(--text-secondary);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 列表视图 */
.file-list-view {
    width: 100%;
}

.file-list-header {
    display: grid;
    grid-template-columns: minmax(200px, 2fr) 1fr 1.5fr 1fr 1fr 1fr;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background-color: var(--background-color);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.file-list-body {
    max-height: 600px;
    overflow-y: auto;
}

.file-item {
    display: grid;
    grid-template-columns: minmax(200px, 2fr) 1fr 1.5fr 1fr 1fr 1fr;
    gap: 1rem;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-fast);
    cursor: pointer;
    align-items: start; /* 顶部对齐，适应多行文本 */
}

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

.file-item:last-child {
    border-bottom: none;
}

.file-name {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 500;
    min-width: 0; /* 允许flex项目收缩 */
}

.file-name span {
    word-break: break-word;
    overflow-wrap: break-word;
    hyphens: auto;
    line-height: 1.4;
    min-width: 0; /* 允许文本收缩 */
}

.file-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    font-size: 1.25rem;
}

.file-icon.firmware {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.file-icon.config {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--primary-light);
}

.file-icon.log {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.file-icon.other {
    background-color: rgba(100, 116, 139, 0.1);
    color: var(--secondary-color);
}

.file-size {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.file-date {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.file-version {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    background-color: var(--background-color);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-primary);
}

.file-actions {
    display: flex;
    gap: 0.5rem;
}

.action-btn {
    padding: 0.5rem;
    border: none;
    background: none;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    color: var(--text-muted);
}

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

.action-btn.download:hover {
    color: var(--success-color);
}

.action-btn.delete:hover {
    color: var(--danger-color);
}

/* 网格视图 */
.file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    padding: 1.5rem;
}

.file-card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-align: center;
    transition: all var(--transition-normal);
    cursor: pointer;
}

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

.file-card-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    font-size: 2rem;
}

.file-card-name {
    font-weight: 500;
    margin-bottom: 0.5rem;
    word-break: break-word;
    overflow-wrap: break-word;
    hyphens: auto;
    line-height: 1.4;
    max-height: 3.6em; /* 限制最大高度为约3行 */
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
}

.file-card-meta {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.file-card-actions {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
}

/* 空状态 */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 400px;
    color: var(--text-muted);
}

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

.empty-state h3 {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    animation: fadeIn var(--transition-normal);
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: var(--surface-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideIn var(--transition-normal);
}

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

.modal-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

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

.modal-body {
    padding: 1.5rem;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 1.5rem;
}

/* 上传区域 */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 3rem 2rem;
    text-align: center;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--primary-light);
    background-color: rgba(59, 130, 246, 0.05);
}

.upload-area i {
    font-size: 3rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.upload-area p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.upload-area input[type="file"] {
    display: none;
}

/* 进度条 */
.upload-progress {
    margin-top: 1.5rem;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    height: 100%;
    background-color: var(--success-color);
    transition: width var(--transition-fast);
    border-radius: var(--radius-sm);
}

.progress-text {
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* 通知 */
.notification {
    position: fixed;
    top: 2rem;
    right: 2rem;
    background-color: var(--surface-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 1rem 1.5rem;
    z-index: 3000;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    border-left: 4px solid var(--success-color);
    opacity: 0;
    visibility: hidden;
}

.notification.show {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
}

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

.notification.warning {
    border-left-color: var(--warning-color);
}

.notification-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.notification-icon {
    font-size: 1.25rem;
}

.notification.success .notification-icon {
    color: var(--success-color);
}

.notification.error .notification-icon {
    color: var(--danger-color);
}

.notification.warning .notification-icon {
    color: var(--warning-color);
}

/* 动画 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .header-container {
        padding: 0 1rem;
        flex-direction: column;
        gap: 1rem;
    }
    
    .logo h1 {
        font-size: 1.25rem;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .toolbar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .toolbar-left,
    .toolbar-right {
        justify-content: center;
    }
    
    .search-box {
        max-width: 100%;
        min-width: 150px;
    }
    
    .search-box input {
        width: 100%;
    }
    
    .file-list-header,
    .file-item {
        grid-template-columns: 2fr 1fr 1fr;
        font-size: 0.75rem;
    }
    
    .col-version,
    .file-version {
        display: none;
    }
    
    .file-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 1rem;
        padding: 1rem;
    }
    
    .modal-content {
        width: 95%;
        margin: 1rem;
    }
    

}

@media (max-width: 480px) {
    .file-list-header,
    .file-item {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .file-name {
        justify-content: center;
    }
    
    .file-grid {
        grid-template-columns: 1fr;
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.75rem;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-color);
}

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

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

/* 选择状态 */
.file-item.selected,
.file-card.selected {
    background-color: rgba(59, 130, 246, 0.1);
    border-color: var(--primary-light);
}

/* 拖拽状态 */
.file-item.dragging,
.file-card.dragging {
    opacity: 0.5;
    transform: scale(0.95);
}

/* 加载状态 */
.btn.loading {
    position: relative;
    color: transparent;
}

.btn.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16px;
    height: 16px;
    margin: -8px 0 0 -8px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    color: white;
}

/* 焦点样式 */
.btn:focus,
input:focus,
select:focus {
    outline: 2px solid var(--primary-light);
    outline-offset: 2px;
}

/* 禁用状态 */
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn:disabled:hover {
    transform: none;
    box-shadow: none;
}

/* 预览模态框 */
.preview-modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.9);
}

.preview-content {
    position: relative;
    margin: 2% auto;
    padding: 20px;
    width: 95%;
    max-width: 1200px;
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    max-height: 95vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.preview-body {
    text-align: center;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-body img {
    max-width: 100%;
    max-height: 70vh;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    cursor: zoom-in;
    transition: transform var(--transition-fast);
}

.preview-body img:hover {
    transform: scale(1.02);
}

.preview-body img.zoomed {
    cursor: zoom-out;
    transform: scale(1.5);
    transition: transform var(--transition-fast);
}

.preview-body pre {
    text-align: left;
    background: var(--background-color);
    padding: 20px;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    max-height: 60vh;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.6;
    width: 100%;
    box-sizing: border-box;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

/* 黑夜模式下的文本预览样式 */
[data-theme="dark"] .preview-body pre {
    background: #1a1a1a;
    color: #e5e5e5;
    border-color: #404040;
}

[data-theme="dark"] .preview-content {
    background: var(--surface-color);
    color: var(--text-primary);
}