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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

/* 头部样式 */
.header-div {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin: 0 auto 20px auto;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    max-width: 1200px;
}

.header-title {
    margin: 0 0 10px 0;
    font-size: 2rem;
    font-weight: 700;
}

.header-link {
    margin-top: 10px;
}

.link-a {
    color: white;
    text-decoration: none;
    padding: 8px 16px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    transition: background-color 0.3s ease;
}

.link-a:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

/* 主容器 */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 10px;
}

/* 上传区域 */
.upload-section {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
    overflow: hidden;
}

.upload-area {
    padding: 40px 20px;
    text-align: center;
    position: relative;
}

.file-label {
    display: block;
    cursor: pointer;
    border: 2px dashed #ddd;
    border-radius: 10px;
    padding: 40px 20px;
    transition: all 0.3s ease;
    background-color: #fafafa;
}

.file-label:hover {
    border-color: #007bff;
    background-color: #f0f8ff;
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.upload-text {
    font-size: 1.2rem;
    font-weight: 500;
    color: #333;
    margin-bottom: 10px;
}

.upload-hint {
    font-size: 0.9rem;
    color: #666;
}

#fileInput {
    display: none;
}

/* 编辑器区域 */
.editor-section {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.editor-container {
    display: flex;
    flex-direction: column;
    height: 100%;
}

/* 工具栏 */
.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background-color: #f8f9fa;
    border-bottom: 1px solid #e9ecef;
    flex-wrap: wrap;
    gap: 10px;
}

.tool-group {
    display: flex;
    gap: 10px;
    align-items: center;
}

.tool-btn {
    padding: 8px 16px;
    border: 1px solid #ddd;
    background-color: white;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
}

.tool-btn:hover {
    background-color: #f0f0f0;
    border-color: #007bff;
}

.tool-btn.active {
    background-color: #007bff;
    color: white;
    border-color: #007bff;
}

.download-btn {
    background-color: #28a745;
    color: white;
    border-color: #28a745;
}

.download-btn:hover {
    background-color: #218838;
}

/* 图片容器 */
.image-container {
    flex: 1;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
    position: relative;
}

.image-wrapper {
    position: relative;
    display: inline-block;
    max-width: 100%;
    max-height: 500px;
    overflow: hidden;
    border: 1px solid #ddd;
    border-radius: 5px;
}

#sourceImage {
    max-width: 100%;
    max-height: 500px;
    display: block;
    user-select: none;
}

/* 裁剪遮罩 */
.crop-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    cursor: crosshair;
    display: none;
}

.crop-overlay.active {
    display: block;
}

/* 裁剪框 */
.crop-box {
    position: absolute;
    border: 2px solid #007bff;
    background-color: transparent;
    cursor: move;
    min-width: 50px;
    min-height: 50px;
}

.crop-box::before {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    right: -1px;
    bottom: -1px;
    border: 1px solid white;
    pointer-events: none;
}

/* 裁剪手柄 */
.crop-handle {
    position: absolute;
    width: 10px;
    height: 10px;
    background-color: #007bff;
    border: 2px solid white;
    border-radius: 50%;
}

.crop-handle.nw {
    top: -5px;
    left: -5px;
    cursor: nw-resize;
}

.crop-handle.ne {
    top: -5px;
    right: -5px;
    cursor: ne-resize;
}

.crop-handle.sw {
    bottom: -5px;
    left: -5px;
    cursor: sw-resize;
}

.crop-handle.se {
    bottom: -5px;
    right: -5px;
    cursor: se-resize;
}

.crop-handle.n {
    top: -5px;
    left: 50%;
    transform: translateX(-50%);
    cursor: n-resize;
}

.crop-handle.s {
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    cursor: s-resize;
}

.crop-handle.w {
    top: 50%;
    left: -5px;
    transform: translateY(-50%);
    cursor: w-resize;
}

.crop-handle.e {
    top: 50%;
    right: -5px;
    transform: translateY(-50%);
    cursor: e-resize;
}

/* 预览区域 */
.preview-section {
    padding: 20px;
    border-top: 1px solid #e9ecef;
    background-color: #f8f9fa;
}

.preview-section h3 {
    margin-bottom: 15px;
    color: #333;
    font-size: 1.1rem;
}

.preview-container {
    display: flex;
    justify-content: center;
    margin-bottom: 15px;
}

#previewCanvas {
    max-width: 200px;
    max-height: 200px;
    border: 1px solid #ddd;
    border-radius: 5px;
    background-color: white;
}

.preview-info {
    display: flex;
    justify-content: center;
    gap: 20px;
    font-size: 0.9rem;
    color: #666;
}

/* 响应式设计 */
@media screen and (max-width: 768px) {
    .main-container {
        padding: 0 5px;
    }
    
    .header-title {
        font-size: 1.5rem;
    }
    
    .toolbar {
        flex-direction: column;
        align-items: stretch;
        gap: 15px;
    }
    
    .tool-group {
        justify-content: center;
    }
    
    .image-container {
        min-height: 300px;
        padding: 10px;
    }
    
    .image-wrapper {
        max-height: 400px;
    }
    
    #sourceImage {
        max-height: 400px;
    }
    
    .preview-info {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}

@media screen and (max-width: 480px) {
    .header-div {
        padding: 15px;
    }
    
    .header-title {
        font-size: 1.3rem;
    }
    
    .upload-area {
        padding: 20px 15px;
    }
    
    .upload-text {
        font-size: 1rem;
    }
    
    .tool-btn {
        padding: 6px 12px;
        font-size: 12px;
    }
    
    .image-container {
        min-height: 250px;
        padding: 5px;
    }
    
    .image-wrapper {
        max-height: 300px;
    }
    
    #sourceImage {
        max-height: 300px;
    }
    
    #previewCanvas {
        max-width: 150px;
        max-height: 150px;
    }
}

/* 拖拽状态 */
.upload-area.dragover {
    border-color: #007bff;
    background-color: #f0f8ff;
}

.upload-area.dragover .file-label {
    border-color: #007bff;
    background-color: #f0f8ff;
}

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

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #007bff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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