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

/* 基础样式 */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'SF Pro Display', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.5;
    color: #1d1d1f;
    background-color: #f5f5f7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 主容器 */
.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 页眉 */
header {
    padding: 20px 0;
}

/* 主页眉 - 带有链接的布局 */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

/* 蓝皮书链接样式 */
.blue-book-link {
    color: #0066cc;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    padding: 8px 15px;
    border-radius: 6px;
    background-color: rgba(0, 102, 204, 0.1);
}

.blue-book-link:hover {
    color: #004499;
    background-color: rgba(0, 102, 204, 0.2);
    text-decoration: underline;
}

h1 {
    font-size: 32px;
    font-weight: 600;
    letter-spacing: -0.5px;
    color: #1d1d1f;
}

/* 主内容区域 - 横版布局 */
main {
    display: flex;
    gap: 30px;
    margin: 20px 0;
}

/* 编辑面板 */
.editor-panel {
    flex: 1;
    background-color: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

/* 预览面板 */
.preview-panel {
    flex: 1.2;
    background-color: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    padding: 20px;
    display: flex;
    flex-direction: column;
}

/* 各部分标题 */
section h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: #1d1d1f;
}

/* 各部分内容区 */
section {
    padding: 20px;
    border-bottom: 1px solid #f2f2f2;
}

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

/* 上传区域 */
.upload-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px 0;
}

.upload-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background-color: #0071e3;
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.upload-button:hover {
    background-color: #0077ed;
    transform: scale(1.02);
}

.upload-button svg {
    width: 18px;
    height: 18px;
}

.file-name {
    margin-top: 12px;
    color: #86868b;
    font-size: 14px;
}

/* 设置区域 */
.setting-group {
    display: flex;
    gap: 20px;
    margin-bottom: 16px;
}

.setting-item {
    flex: 1;
}

.setting-item label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: #1d1d1f;
    font-weight: 500;
}

.input-with-unit {
    display: flex;
    align-items: center;
    position: relative;
}

.input-with-unit input {
    width: 100%;
    padding: 10px 40px 10px 12px;
    border: 1px solid #d2d2d7;
    border-radius: 8px;
    font-size: 15px;
    transition: border-color 0.2s ease;
}

.input-with-unit input:focus {
    border-color: #0071e3;
    outline: none;
}

.unit {
    position: absolute;
    right: 12px;
    color: #86868b;
    pointer-events: none;
}

/* 下拉菜单样式 */
.select-wrapper {
    position: relative;
    width: 100%;
}

select {
    width: 100%;
    padding: 10px 36px 10px 12px;
    border: 1px solid #d2d2d7;
    border-radius: 8px;
    font-size: 15px;
    background-color: white;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    cursor: pointer;
    transition: border-color 0.2s ease;
}

select:focus {
    border-color: #0071e3;
    outline: none;
}

.select-arrow {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    color: #86868b;
}

/* 颜色选择器 */
.color-picker {
    display: flex;
    align-items: center;
    gap: 12px;
}

.color-picker input[type="color"] {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    padding: 0;
    background: none;
}

.color-picker input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
    border-radius: 8px;
    overflow: hidden;
}

.color-picker input[type="color"]::-webkit-color-swatch {
    border: 1px solid #d2d2d7;
    border-radius: 8px;
}

.color-value {
    font-size: 14px;
    color: #86868b;
}

/* 文本区域 */
textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #d2d2d7;
    border-radius: 8px;
    font-size: 15px;
    resize: vertical;
    min-height: 120px;
    font-family: inherit;
    transition: border-color 0.2s ease;
}

textarea:focus {
    border-color: #0071e3;
    outline: none;
}

/* 按钮区域 */
.action-section {
    display: flex;
    gap: 12px;
    padding-top: 20px;
}

.primary-button, .secondary-button {
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
}

.primary-button {
    background-color: #0071e3;
    color: white;
    flex: 1;
}

.primary-button:hover {
    background-color: #0077ed;
    transform: scale(1.02);
}

.secondary-button {
    background-color: #f5f5f7;
    color: #1d1d1f;
    border: 1px solid #d2d2d7;
    flex: 1;
}

.secondary-button:hover {
    background-color: #e8e8ed;
}

.secondary-button:disabled {
    background-color: #f5f5f7;
    color: #86868b;
    cursor: not-allowed;
    border: 1px solid #d2d2d7;
}

/* 预览区域 */
#previewContainer {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #f5f5f7;
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    min-height: 400px;
    margin-top: 16px;
}

.no-preview {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #86868b;
    text-align: center;
    padding: 20px;
}

.no-preview svg {
    margin-bottom: 16px;
    color: #86868b;
}

.no-preview p {
    font-size: 16px;
}

#previewCanvas {
    max-width: 100%;
    max-height: 100%;
    display: none;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

/* 页脚 */
footer {
    text-align: center;
    padding: 20px 0;
    color: #86868b;
    font-size: 14px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

/* 访问量统计 */
.visit-counter {
    margin-top: 5px;
}

.visit-counter img {
    height: 20px;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.visit-counter img:hover {
    opacity: 1;
}

/* 响应式设计 */
@media (max-width: 900px) {
    main {
        flex-direction: column;
    }
    
    .setting-group {
        flex-direction: column;
        gap: 16px;
    }
    
    .action-section {
        flex-direction: column;
    }
    
    #previewContainer {
        min-height: 300px;
    }
    
    /* 移动设备上的页眉布局 */
    .main-header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
        padding: 10px 20px;
    }
    
    h1 {
        margin-bottom: 5px;
        font-size: 28px;
    }
}