/* 全局样式 - 苹果风格设计 */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: #f5f5f7;
    color: #1d1d1f;
    margin: 0;
    padding: 0;
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

/* 容器样式 - 苹果卡片设计 */
.container {
    max-width: 1000px;
    width: 90%;
    margin: 20px auto;
    padding: 30px;
    background-color: white;
    border-radius: 18px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

/* 标题样式 - 苹果字体风格 */
h1 {
    font-size: 32px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 30px;
    color: #1d1d1f;
    letter-spacing: -0.5px;
}

/* 上传区域样式 */
.upload-area {
    text-align: center;
    margin-bottom: 30px;
    padding: 40px;
    border: 2px dashed #d2d2d7;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.upload-area:hover {
    border-color: #0071e3;
    background-color: rgba(0, 113, 227, 0.05);
}

/* 上传按钮样式 - 苹果按钮设计 */
.upload-btn {
    display: inline-block;
    padding: 12px 28px;
    background-color: #0071e3;
    color: white;
    border-radius: 980px;
    cursor: pointer;
    font-size: 17px;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
    border: none;
    outline: none;
}

.upload-btn:hover {
    background-color: #0077ed;
    transform: scale(1.03);
}

/* 隐藏原生文件输入 */
#fileInput {
    display: none;
}

/* 控制区域样式 */
.control-area {
    margin-bottom: 30px;
    padding: 20px;
    background-color: #f5f5f7;
    border-radius: 8px;
}

/* 滑块样式 */
input[type="range"] {
    width: 100%;
    margin: 10px 0;
}

/* 压缩按钮样式 */
#compressBtn {
    display: block;
    width: 100%;
    padding: 12px;
    background-color: #34c759;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.2s;
}

#compressBtn:hover {
    background-color: #30d158;
}

/* 预览区域样式 */
.preview-area {
    display: flex;
    gap: 20px;
    margin-top: 20px;
}

/* 预览框样式 */
.preview-box {
    flex: 1;
    padding: 20px;
    background-color: #f5f5f7;
    border-radius: 8px;
    text-align: center;
}

.preview-box h3 {
    margin-top: 0;
    color: #1d1d1f;
}

/* 图片预览样式 */
.preview-box img {
    max-width: 100%;
    max-height: 300px;
    margin: 10px auto;
    border-radius: 4px;
    display: block;
}

/* 文件大小信息样式 */
.preview-box p {
    margin: 5px 0;
    font-size: 14px;
}

/* 下载按钮样式 */
#downloadBtn {
    display: block;
    width: 100%;
    padding: 12px;
    margin-top: 10px;
    background-color: #0071e3;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.2s;
}

#downloadBtn:hover {
    background-color: #0077ed;
}

#downloadBtn:disabled {
    background-color: #a7a7a7;
    cursor: not-allowed;
}