/* ========================================
   云盘系统 - 绿色现代风格
   ======================================== */

/* CSS变量 - 绿色清新主题 */
:root {
    --primary: #10b981;
    --primary-dark: #059669;
    --primary-light: #d1fae5;
    --primary-lighter: #ecfdf5;
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --bg-card-hover: #f0fdf4;
    --bg-sidebar: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --border: #e5e7eb;
    --border-hover: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --success: #10b981;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
    --shadow-strong: 0 8px 30px rgba(0, 0, 0, 0.12);
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --transition: all 0.25s ease;
}

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-main);
    -webkit-font-smoothing: antialiased;
}

body { min-height: 100vh; }

/* ========================================
   登录页面
   ======================================== */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, #ecfdf5 0%, #f0fdf4 50%, #f8fafc 100%);
    position: relative;
}

.auth-box {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
    padding: 40px;
    position: relative;
    animation: fadeIn 0.5s ease;
}

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

.auth-logo {
    text-align: center;
    margin-bottom: 32px;
}

.auth-logo .icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 32px;
    box-shadow: 0 8px 24px rgba(16, 185, 129, 0.3);
}

.auth-logo h1 {
    color: var(--text-primary);
    font-size: 22px;
    font-weight: 600;
}

.auth-logo p {
    color: var(--text-secondary);
    font-size: 13px;
    margin-top: 4px;
}

/* Tab切换 */
.auth-tabs {
    display: flex;
    background: var(--bg-main);
    border-radius: var(--radius);
    padding: 4px;
    margin-bottom: 28px;
}

.auth-tab {
    flex: 1;
    padding: 10px 16px;
    text-align: center;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.auth-tab:hover { color: var(--text-primary); }

.auth-tab.active {
    background: var(--bg-card);
    color: var(--primary);
    box-shadow: var(--shadow);
}

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

/* 表单 */
.form-group { margin-bottom: 20px; }

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    color: var(--text-primary);
    background: var(--bg-card);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-control::placeholder { color: var(--text-muted); }

.remember-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 24px;
}

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

.remember-row label {
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    margin: 0;
}

.btn-primary {
    width: 100%;
    padding: 14px;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

/* 二维码登录 */
.qr-section { text-align: center; }

.qr-box {
    background: var(--bg-main);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 16px;
}

.qr-code-container {
    width: 180px;
    height: 180px;
    margin: 0 auto;
    background: #fff;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
}

.qr-hint {
    font-size: 13px;
    color: var(--text-secondary);
}

.qr-refresh {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    font-size: 13px;
    color: var(--primary);
    background: var(--primary-light);
    border: 1px solid var(--border-hover);
    border-radius: 20px;
    cursor: pointer;
    margin-top: 16px;
    transition: var(--transition);
}

.qr-refresh:hover { background: var(--primary-lighter); }

/* 提示信息 */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    font-size: 13px;
}

.alert-error {
    background: #fef2f2;
    color: var(--danger);
    border: 1px solid #fecaca;
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 13px;
    color: var(--text-secondary);
}

.auth-footer a {
    color: var(--primary);
    text-decoration: none;
}

.auth-footer a:hover { text-decoration: underline; }

/* ========================================
   主布局
   ======================================== */
.main-layout {
    display: flex;
    min-height: 100vh;
}

/* 侧边栏 */
.sidebar {
    width: 260px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 100;
}

.sidebar-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    overflow-y: auto;
}

.nav-section { margin-bottom: 24px; }

.nav-section-title {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 0 12px;
    margin-bottom: 8px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius);
    transition: var(--transition);
    font-size: 14px;
}

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

.nav-item.active {
    background: var(--primary-light);
    color: var(--primary);
}

.nav-icon { font-size: 18px; }

.sidebar-storage {
    padding: 16px 20px;
    border-top: 1px solid var(--border);
    background: var(--primary-lighter);
}

.storage-bar {
    height: 4px;
    background: rgba(16, 185, 129, 0.2);
    border-radius: 2px;
    margin: 8px 0;
    overflow: hidden;
}

.storage-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: 2px;
    transition: width 0.5s ease;
}

/* 主内容区 */
.main-content {
    flex: 1;
    margin-left: 260px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 顶部栏 */
.topbar {
    height: 60px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar-title {
    flex: 1;
    font-weight: 600;
    color: var(--text-primary);
}

.mobile-menu-btn {
    display: none !important;
}

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

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

/* 用户下拉 */
.user-dropdown-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: var(--primary-lighter);
    border: 1px solid var(--primary-light);
    border-radius: 20px;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
}

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

.user-avatar-sm {
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

.user-dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 160px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s;
    z-index: 10001;
    overflow: hidden;
}

.user-dropdown-topbar.open .user-dropdown-menu,
.user-dropdown-topbar .user-dropdown-menu.show,
.user-dropdown-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.dropdown-item:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.dropdown-divider {
    height: 1px;
    background: var(--border);
    margin: 4px 0;
}

.dropdown-item.logout { color: var(--danger); }

/* 内容区域 */
.content-area {
    flex: 1;
    padding: 24px;
}

/* 工具栏 */
.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.toolbar-left, .toolbar-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 500;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    white-space: nowrap;
    flex-shrink: 0;
    width: auto;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #fff;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.toolbar .btn-primary {
    width: auto;
}

.btn-cancel {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-cancel:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

/* 搜索框 */
.search-box-inline {
    display: flex;
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 8px 16px;
}

.search-box-inline input {
    border: none;
    background: transparent;
    padding: 8px;
    color: var(--text-primary);
    width: 200px;
    outline: none;
}

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

/* 视图切换 */
.view-toggle {
    display: flex;
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 2px;
    border: 1px solid var(--border);
}

.view-toggle button {
    padding: 6px 10px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 4px;
    transition: var(--transition);
}

.view-toggle button:hover { color: var(--text-primary); }

.view-toggle button.active {
    background: var(--primary-light);
    color: var(--primary);
}

/* 面包屑 */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
    font-size: 13px;
}

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

.breadcrumb-item:hover { color: var(--primary); }

.breadcrumb-item.current { color: var(--text-primary); font-weight: 500; }

.breadcrumb-separator { color: var(--text-muted); }

/* 文件列表 - 网格视图 */
.file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 16px;
}

.file-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px 16px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.file-item:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.file-item.selected {
    border-color: var(--primary);
    background: var(--primary-lighter);
}

.file-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

/* 图片缩略图 */
.file-icon.image-icon {
    width: 100%;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--bg-main);
}

.file-icon.image-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 视频缩略图 */
.file-icon.video-icon {
    width: 100%;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
    border-radius: var(--radius);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.file-icon.video-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-thumb {
    width: 100%;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.3);
    border-radius: var(--radius);
}

.play-icon {
    font-size: 32px;
    color: #fff;
}

/* 文档图标 */
.file-icon.pdf-icon,
.file-icon.doc-icon,
.file-icon.excel-icon,
.file-icon.ppt-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
    border-radius: var(--radius);
}

.file-icon.pdf-icon { background: #fee2e2; }
.file-icon.doc-icon { background: #dbeafe; }
.file-icon.excel-icon { background: #d1fae5; }
.file-icon.ppt-icon { background: #fef3c7; }

.doc-label {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
}

/* 文件夹图标 */
.file-icon.folder-icon {
    font-size: 56px;
    margin-bottom: 8px;
}

/* 音频图标 */
.file-icon.audio-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

/* 文本图标 */
.file-icon.text-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

/* 压缩包图标 */
.file-icon.archive-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

/* 代码文件图标 */
.file-icon.code-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

.file-name {
    font-size: 13px;
    color: var(--text-primary);
    word-break: break-all;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 36px;
}

.file-size {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 6px;
}

.file-table .file-icon {
    font-size: 24px;
    margin: 0;
}

/* 文件列表 - 列表视图 */
.file-list table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.file-list th, .file-list td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.file-list th {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: var(--bg-main);
}

.file-list tr:hover td {
    background: var(--bg-card-hover);
}

.file-list tr:last-child td {
    border-bottom: none;
}

.file-list .file-name-cell {
    display: flex;
    align-items: center;
    gap: 12px;
}

.file-table {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.actions { display: flex; gap: 4px; }

.actions button {
    padding: 4px 8px;
    background: transparent;
    border: none;
    cursor: pointer;
    border-radius: 4px;
    color: var(--text-muted);
    transition: var(--transition);
}

.actions button:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

/* 右键菜单 */
.context-menu {
    position: fixed;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    min-width: 180px;
    padding: 8px;
    display: none;
    z-index: 1000;
}

.context-menu.show { display: block; }

.context-menu-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    font-size: 13px;
    color: var(--text-primary);
    cursor: pointer;
    border-radius: var(--radius);
    transition: var(--transition);
}

.context-menu-item:hover {
    background: var(--bg-card-hover);
}

.context-menu-item.danger { color: var(--danger); }

.context-menu-divider {
    height: 1px;
    background: var(--border);
    margin: 4px 0;
}

/* 模态框 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal.show,
.modal.visible {
    display: flex !important;
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow: auto;
    transform: scale(0.9);
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
}

.modal.show .modal-content { transform: scale(1); }

.modal-sm { max-width: 450px; }
.modal-lg { max-width: 900px; }
.modal-xl { max-width: 1100px; }

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}

.modal-header h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--radius);
    font-size: 20px;
    transition: var(--transition);
}

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

.modal-body { padding: 24px; }

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 24px;
    border-top: 1px solid var(--border);
}

.modal-footer .btn {
    min-width: auto;
    white-space: nowrap;
}

/* 模态框内容内的按钮样式 */
.modal-body .btn {
    padding: 6px 12px;
    font-size: 12px;
}

.modal-body .btn-sm {
    padding: 4px 8px;
    font-size: 11px;
}

/* 模态框内flex布局的按钮组 */
.modal-body .btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.modal-body .btn-group .btn {
    flex: 0 0 auto;
}

/* 模态框内文件列表 - 移动端优先设计 */
.file-list-modal {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 8px 0;
}

.file-item-modal {
    background: #ffffff;
    border-radius: 16px;
    padding: 16px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.file-item-modal .file-item-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.file-item-modal .file-item-icon {
    font-size: 36px;
    flex-shrink: 0;
}

.file-item-modal .file-item-info {
    flex: 1;
    min-width: 0;
}

.file-item-modal .file-item-name {
    font-weight: 600;
    font-size: 15px;
    color: #1f2937;
    word-break: break-word;
    line-height: 1.4;
    margin-bottom: 4px;
}

.file-item-modal .file-item-meta {
    font-size: 13px;
    color: #6b7280;
}

.file-item-modal .file-item-actions {
    display: flex;
    gap: 10px;
}

.file-item-modal .file-item-actions button {
    flex: 1;
    padding: 12px 8px;
    font-size: 14px;
    font-weight: 600;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    text-align: center;
    transition: all 0.2s;
}

.file-item-modal .file-item-actions .btn-view {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: #ffffff;
}

.file-item-modal .file-item-actions .btn-view:active {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
    transform: scale(0.98);
}

.file-item-modal .file-item-actions .btn-download {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: #ffffff;
}

.file-item-modal .file-item-actions .btn-download:active {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    transform: scale(0.98);
}

.file-item-modal .file-item-actions .btn-remove {
    background: #f3f4f6;
    color: #374151;
}

.file-item-modal .file-item-actions .btn-remove:active {
    background: #e5e7eb;
    transform: scale(0.98);
}

/* PC端：保持紧凑布局 */
@media (min-width: 769px) {
    .file-list-modal {
        gap: 8px;
    }
    
    .file-item-modal {
        display: flex;
        align-items: center;
        padding: 12px 16px;
        border-radius: 10px;
        box-shadow: none;
        background: #f9fafb;
    }
    
    .file-item-modal .file-item-header {
        margin-bottom: 0;
        flex: 1;
    }
    
    .file-item-modal .file-item-icon {
        font-size: 28px;
    }
    
    .file-item-modal .file-item-name {
        font-size: 14px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        margin-bottom: 0;
    }
    
    .file-item-modal .file-item-meta {
        display: none;
    }
    
    .file-item-modal .file-item-meta::after {
        content: attr(data-size);
    }
    
    .file-item-modal .file-item-info::after {
        content: attr(data-size);
        font-size: 12px;
        color: #6b7280;
        margin-left: 8px;
    }
    
    .file-item-modal .file-item-actions {
        flex: 0 0 auto;
    }
    
    .file-item-modal .file-item-actions button {
        flex: 0 0 auto;
        padding: 8px 14px;
        font-size: 13px;
        font-weight: 500;
        border-radius: 8px;
    }
}

/* Toast提示 */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: 12px 24px;
    background: var(--text-primary);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    font-size: 14px;
    color: #fff;
    opacity: 0;
    transition: var(--transition);
    z-index: 2000;
}

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

.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }

/* 确认对话框 */
#confirmModal h3 {
    font-size: 18px;
    margin-bottom: 12px;
}

#confirmMessage {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

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

/* 上传模态框 */
.upload-drop-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    padding: 48px 24px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.upload-drop-zone:hover,
.upload-drop-zone.dragover {
    border-color: var(--primary);
    background: var(--primary-lighter);
}

.upload-drop-zone .icon { font-size: 48px; margin-bottom: 16px; }
.upload-drop-zone p { color: var(--text-secondary); }
.upload-drop-zone .hint { font-size: 12px; color: var(--text-muted); margin-top: 8px; }

/* 上传进度 */
.upload-progress {
    margin-bottom: 20px;
    display: none;
}

.upload-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px 16px;
    margin-bottom: 8px;
}

.upload-item-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
}

.upload-item-name {
    font-size: 13px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.upload-item-status {
    font-size: 12px;
    color: var(--text-secondary);
}

.progress-bar {
    height: 4px;
    background: var(--bg-main);
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: 2px;
    transition: width 0.3s ease;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 80px 40px;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.empty-state span {
    font-size: 64px;
    display: block;
    margin-bottom: 20px;
}

.empty-state h3 {
    font-size: 18px;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.empty-state p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* 响应式 */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: var(--transition);
    }

    .sidebar.open { transform: translateX(0); }

    .main-content { margin-left: 0; }

    .mobile-menu-btn { display: flex; }

    .file-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }

    /* 移动端模态框 */
    .modal-content {
        width: 100%;
        max-height: 90vh;
        border-radius: 20px 20px 0 0;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
    }

    .modal {
        align-items: flex-end;
    }

    .modal-header {
        padding: 16px 20px;
        border-radius: 20px 20px 0 0;
    }

    .modal-header h3 {
        font-size: 16px;
    }

    .modal-body { 
        padding: 16px; 
        max-height: calc(90vh - 60px);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .modal-footer {
        padding: 16px 20px;
        position: sticky;
        bottom: 0;
        background: var(--bg-card);
        border-radius: 0;
    }
}