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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    background: #f5f5f5;
    color: #333;
}

/* 主容器 */
.disk-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    background: white;
}

/* 文件列表容器 */
.file-list-container {
    position: relative;
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}

/* 拖拽提示 */
.drop-hint {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: absolute;
    top: 24px;
    left: 24px;
    right: 24px;
    bottom: 24px;
    background: rgba(24, 144, 255, 0.05);
    border: 2px dashed #1890ff;
    border-radius: 8px;
    color: #1890ff;
    z-index: 10;
    pointer-events: none;
}

.drop-hint svg {
    margin-bottom: 16px;
    opacity: 0.6;
}

.drop-hint p {
    font-size: 16px;
    font-weight: 500;
}

.file-list-container.drag-over .drop-hint {
    display: flex;
}

/* 文件列表 */
.file-list {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    padding: 8px;
}

/* 文件项 */
.file-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: calc((100% - 32px) / 3);
    min-width: 120px;
    max-width: 180px;
    padding: 16px 8px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;
    user-select: none;
}

.file-item:hover {
    background: #f5f5f5;
}

.file-item.selected {
    background: #e6f7ff;
}

.file-item.dragging {
    opacity: 0.5;
    background: #e6f7ff;
}

.file-item.cut {
    opacity: 0.6;
    filter: grayscale(0.3);
}

.file-item.drag-target {
    background: rgba(24, 144, 255, 0.15);
    outline: 2px dashed #1890ff;
    outline-offset: -2px;
}

/* 选中状态 */
.file-item.selected {
    background: rgba(82, 196, 26, 0.1);
}

.file-item .check-mark {
    position: absolute;
    top: 4px;
    left: 4px;
    width: 20px;
    height: 20px;
    background: #52c41a;
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    color: white;
    z-index: 5;
}

.file-item.selected .check-mark {
    display: flex;
}

.file-item {
    position: relative;
}

/* 框选区域 */
.selection-box {
    position: fixed;
    border: 1px solid #1890ff;
    background: rgba(24, 144, 255, 0.1);
    pointer-events: none;
    z-index: 1000;
    display: none;
}

.file-icon {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    max-width: 140px;
    aspect-ratio: 1;
    margin: 0 auto 8px;
}

.file-icon svg {
    width: 60%;
    height: 60%;
}

/* 图片缩略图 */
.file-thumbnail {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    max-width: 140px;
    aspect-ratio: 1;
    margin: 0 auto 8px;
    border-radius: 6px;
    overflow: hidden;
    /* 棋盘格背景用于显示透明部分 */
    background-color: #ffffff;
    background-image: 
        linear-gradient(45deg, #e0e0e0 25%, transparent 25%),
        linear-gradient(-45deg, #e0e0e0 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #e0e0e0 75%),
        linear-gradient(-45deg, transparent 75%, #e0e0e0 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
    border: 1px solid #e5e5e5;
    position: relative;
}

.file-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* 文件夹预览徽章 */
.folder-preview {
    border: 2px solid #fbbf24;
    /* 有预览图的文件夹使用纯白色背景 */
    background: #ffffff !important;
    background-image: none !important;
}

.folder-badge {
    position: absolute;
    bottom: 4px;
    right: 4px;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 6px;
    font-size: 14px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* 文件夹图标 */
.folder-icon {
    color: #ffc107;
}

/* 文件图标 */
.file-icon-default {
    color: #90caf9;
}

.file-icon-image {
    color: #81c784;
}

.file-icon-video {
    color: #e57373;
}

.file-icon-audio {
    color: #ba68c8;
}

.file-icon-zip {
    color: #ff8a65;
}

.file-icon-document {
    color: #64b5f6;
}

/* 文件名 */
.file-name {
    width: 100%;
    font-size: 13px;
    text-align: center;
    word-break: break-all;
    color: #333;
    line-height: 1.4;
    max-height: 2.8em;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    padding: 2px 4px;
    border-radius: 4px;
    cursor: text;
}

.file-name:hover {
    background: rgba(24, 144, 255, 0.1);
}

/* 重命名输入框 */
.rename-input {
    width: 100%;
    font-size: 13px;
    text-align: center;
    padding: 2px 4px;
    border: 1px solid #1890ff;
    border-radius: 4px;
    outline: none;
    background: white;
}

/* 文件信息 */
.file-info {
    font-size: 11px;
    color: #999;
    margin-top: 4px;
}

/* 空状态 */
.empty-state {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    color: #999;
}

.empty-state svg {
    margin-bottom: 24px;
}

.empty-state p {
    font-size: 16px;
    margin-bottom: 8px;
}

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

.empty-state.show {
    display: flex;
}

/* 加载状态 */
.loading {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    z-index: 20;
}

.loading.show {
    display: flex;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #1890ff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading p {
    margin-top: 16px;
    color: #666;
    font-size: 14px;
}

/* 上传进度 */
.upload-progress {
    display: none;
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    padding: 16px;
    min-width: 300px;
    max-width: 400px;
    z-index: 1000;
}

.upload-progress.show {
    display: block;
}

.upload-progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.upload-progress-title {
    font-size: 14px;
    font-weight: 500;
    color: #333;
}

.upload-progress-close {
    background: none;
    border: none;
    color: #999;
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
}

.upload-progress-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
    border-top: 1px solid #f0f0f0;
}

.upload-progress-icon {
    flex-shrink: 0;
    color: #1890ff;
}

.upload-progress-info {
    flex: 1;
    min-width: 0;
}

.upload-progress-name {
    font-size: 13px;
    color: #333;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.upload-progress-status {
    font-size: 12px;
    color: #999;
    margin-top: 2px;
}

.upload-progress-bar {
    width: 100%;
    height: 4px;
    background: #f0f0f0;
    border-radius: 2px;
    margin-top: 4px;
    overflow: hidden;
}

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

.upload-progress-list {
    max-height: 320px;
    overflow-y: auto;
}

/* 响应式 */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 12px;
        align-items: stretch;
    }
    
    .breadcrumb {
        justify-content: flex-start;
    }
    
    .actions {
        justify-content: flex-end;
    }
    
    .file-list {
        gap: 12px;
    }
    
    .file-item {
        width: calc((100% - 24px) / 3);
        min-width: 100px;
        max-width: none;
    }
}

@media (max-width: 650px) {
    .file-item {
        width: calc((100% - 12px) / 2);
        min-width: 100px;
    }
}