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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f5f7fa;
    color: #333;
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* 顶部导航栏 */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    background: #fff;
    border-bottom: 1px solid #e8e8e8;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    z-index: 100;
}

.header-left .logo {
    font-size: 18px;
    font-weight: 600;
    color: #1890ff;
}

.header-center {
    flex: 1;
    padding: 0 20px;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: #666;
}

.breadcrumb-item {
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: background 0.2s;
}

.breadcrumb-item:hover {
    background: #f0f0f0;
}

.breadcrumb-item.active {
    color: #1890ff;
    font-weight: 500;
}

.breadcrumb-separator {
    color: #ccc;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: 1px solid #d9d9d9;
    border-radius: 6px;
    background: #fff;
    color: #333;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn:hover {
    border-color: #1890ff;
    color: #1890ff;
}

.btn-primary {
    background: #1890ff;
    border-color: #1890ff;
    color: #fff;
}

.btn-primary:hover {
    background: #40a9ff;
    border-color: #40a9ff;
    color: #fff;
}

.btn-danger {
    background: #ff4d4f;
    border-color: #ff4d4f;
    color: #fff;
}

.btn-danger:hover {
    background: #ff7875;
    border-color: #ff7875;
    color: #fff;
}

.btn-icon {
    padding: 8px;
    width: 36px;
    height: 36px;
    justify-content: center;
}

.btn-sm {
    padding: 4px 12px;
    font-size: 13px;
}

.btn-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #999;
    line-height: 1;
}

.btn-close:hover {
    color: #333;
}

/* 主内容区 */
.app-main {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* 侧边栏 */
.sidebar {
    width: 240px;
    background: #fff;
    border-right: 1px solid #e8e8e8;
    overflow-y: auto;
    padding: 16px 0;
}

.sidebar-section {
    padding: 0 16px 16px;
    border-bottom: 1px solid #f0f0f0;
    margin-bottom: 16px;
}

.sidebar-section:last-child {
    border-bottom: none;
}

.sidebar-section h3 {
    font-size: 13px;
    color: #999;
    margin-bottom: 12px;
    font-weight: 500;
}

.folder-tree {
    font-size: 14px;
}

.folder-tree-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s;
    margin-bottom: 2px;
}

.folder-tree-item:hover {
    background: #f5f5f5;
}

.folder-tree-item.active {
    background: #e6f7ff;
    color: #1890ff;
}

.folder-tree-item .folder-icon {
    font-size: 16px;
}

.folder-tree-children {
    margin-left: 20px;
}

.storage-info {
    font-size: 13px;
}

.storage-bar {
    height: 8px;
    background: #f0f0f0;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 8px;
}

.storage-used {
    height: 100%;
    background: linear-gradient(90deg, #1890ff, #36cfc9);
    border-radius: 4px;
    transition: width 0.3s;
}

.storage-text {
    color: #666;
    font-size: 12px;
}

/* 主内容区 */
.main-content {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    position: relative;
}

/* 上传区域 */
.upload-area {
    border: 2px dashed #d9d9d9;
    border-radius: 8px;
    padding: 40px;
    text-align: center;
    margin-bottom: 20px;
    transition: all 0.3s;
    background: #fafafa;
}

.upload-area.drag-over {
    border-color: #1890ff;
    background: #e6f7ff;
}

.upload-placeholder .upload-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.upload-placeholder p {
    color: #666;
    margin-bottom: 8px;
}

.upload-hint {
    font-size: 13px;
    color: #999;
}

/* 文件列表 - 列表视图 */
.file-list.list-view {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.file-list-header {
    display: grid;
    grid-template-columns: 1fr 120px 150px 120px;
    padding: 12px 16px;
    background: #fafafa;
    border-bottom: 1px solid #f0f0f0;
    font-size: 13px;
    color: #666;
    font-weight: 500;
}

.file-item {
    display: grid;
    grid-template-columns: 1fr 120px 150px 120px;
    padding: 12px 16px;
    border-bottom: 1px solid #f5f5f5;
    align-items: center;
    cursor: pointer;
    transition: background 0.2s;
}

.file-item:hover {
    background: #fafafa;
}

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

.file-name {
    display: flex;
    align-items: center;
    gap: 10px;
}

.file-icon {
    font-size: 20px;
}

.file-name-text {
    font-size: 14px;
    color: #333;
}

.file-size, .file-date, .file-actions {
    font-size: 13px;
    color: #999;
}

.file-actions {
    display: flex;
    gap: 8px;
    opacity: 0;
    transition: opacity 0.2s;
}

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

.action-btn {
    padding: 4px 8px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 13px;
    color: #666;
    border-radius: 4px;
    transition: all 0.2s;
}

.action-btn:hover {
    background: #f0f0f0;
    color: #1890ff;
}

.action-btn.delete:hover {
    color: #ff4d4f;
}

/* 文件列表 - 图标视图 */
.file-list.grid-view {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 16px;
}

.grid-view .file-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px 12px;
    background: #fff;
    border-radius: 8px;
    border: 2px solid transparent;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.grid-view .file-item:hover {
    border-color: #1890ff;
    background: #fff;
}

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

.grid-view .file-name-text {
    font-size: 13px;
    text-align: center;
    word-break: break-all;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.grid-view .file-size,
.grid-view .file-date,
.grid-view .file-actions {
    display: none;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: #999;
}

.empty-icon {
    font-size: 64px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state p {
    margin-bottom: 8px;
}

.empty-hint {
    font-size: 13px;
    color: #bbb;
}

/* 弹窗样式 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: #fff;
    border-radius: 8px;
    width: 500px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.modal-small {
    width: 400px;
}

.modal-large {
    width: 700px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid #f0f0f0;
}

.modal-header h3 {
    font-size: 16px;
    font-weight: 600;
}

.modal-body {
    padding: 20px;
    flex: 1;
    overflow-y: auto;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 20px;
    border-top: 1px solid #f0f0f0;
}

/* 表单样式 */
.form-input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #d9d9d9;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: #1890ff;
    box-shadow: 0 0 0 2px rgba(24,144,255,0.2);
}

.form-input-sm {
    padding: 6px 10px;
    font-size: 13px;
}

/* 文件编辑器 */
.editor-toolbar {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
    align-items: center;
}

.editor-toolbar .form-input {
    flex: 1;
}

.file-editor {
    width: 100%;
    height: 400px;
    padding: 12px;
    border: 1px solid #d9d9d9;
    border-radius: 6px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 14px;
    line-height: 1.6;
    resize: none;
}

.file-editor:focus {
    outline: none;
    border-color: #1890ff;
    box-shadow: 0 0 0 2px rgba(24,144,255,0.2);
}

/* 上传进度 */
.upload-progress-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.upload-progress-item {
    padding: 12px;
    background: #fafafa;
    border-radius: 6px;
}

.upload-file-name {
    font-size: 14px;
    margin-bottom: 8px;
    color: #333;
}

.upload-progress-bar {
    height: 6px;
    background: #e8e8e8;
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 6px;
}

.upload-progress-fill {
    height: 100%;
    background: #1890ff;
    border-radius: 3px;
    transition: width 0.3s;
}

.upload-progress-text {
    font-size: 12px;
    color: #999;
    display: flex;
    justify-content: space-between;
}

.upload-status {
    font-size: 12px;
}

.upload-status.success {
    color: #52c41a;
}

.upload-status.error {
    color: #ff4d4f;
}

/* 分享弹窗 */
.share-hint {
    font-size: 13px;
    color: #52c41a;
    margin-bottom: 16px;
}

.share-link-box {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.share-link-box .form-input {
    flex: 1;
    background: #f5f5f5;
}

.share-info {
    padding: 12px;
    background: #fafafa;
    border-radius: 6px;
    font-size: 13px;
    color: #666;
}

.share-info p {
    margin-bottom: 4px;
}

.share-info p:last-child {
    margin-bottom: 0;
}

/* 加载状态 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.8);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid #f0f0f0;
    border-top-color: #1890ff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: 16px;
}

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

.loading-overlay p {
    color: #666;
    font-size: 14px;
}

/* Toast 提示 */
.toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 24px;
    background: rgba(0,0,0,0.8);
    color: #fff;
    border-radius: 6px;
    font-size: 14px;
    z-index: 3000;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

.toast.success {
    background: rgba(82, 196, 26, 0.9);
}

.toast.error {
    background: rgba(255, 77, 79, 0.9);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .sidebar {
        display: none;
    }
    
    .header-right .btn span {
        display: none;
    }
    
    .header-right .btn {
        padding: 8px;
        width: 36px;
        height: 36px;
        justify-content: center;
    }
    
    .file-list-header {
        grid-template-columns: 1fr 80px;
    }
    
    .file-item {
        grid-template-columns: 1fr 80px;
    }
    
    .file-date {
        display: none;
    }
    
    .file-actions {
        opacity: 1;
    }
    
    .modal-content {
        width: 90%;
        margin: 20px;
    }
}

/* 右键菜单 */
.context-menu {
    position: fixed;
    background: #fff;
    border-radius: 6px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.15);
    padding: 6px 0;
    min-width: 140px;
    z-index: 1500;
    display: none;
}

.context-menu-item {
    padding: 8px 16px;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.context-menu-item:hover {
    background: #f5f5f5;
}

.context-menu-item.danger {
    color: #ff4d4f;
}

.context-menu-divider {
    height: 1px;
    background: #f0f0f0;
    margin: 4px 0;
}