/* 全局样式 */
:root {
    --primary-color: #007AFF;
    --background-color: #F5F5F7;
    --card-background: rgba(255, 255, 255, 0.8);
    --text-color: #1D1D1F;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* 标题样式 */
header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

header p {
    color: #86868B;
}

/* 上传区域样式 */
.upload-area {
    background: var(--card-background);
    border-radius: 20px;
    padding: 3rem;
    text-align: center;
    border: 2px dashed #DEDEDE;
    backdrop-filter: blur(20px);
    transition: all 0.3s ease;
}

.upload-area.drag-over {
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.9);
}

.upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.upload-icon {
    stroke: var(--primary-color);
    stroke-width: 2;
    fill: none;
}

.upload-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.8rem 2rem;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.upload-btn:hover {
    transform: scale(1.05);
}

/* 预览区域样式 */
.preview-container {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.preview-box {
    flex: 1;
    min-width: 300px;
    background: var(--card-background);
    border-radius: 20px;
    padding: 1.5rem;
    backdrop-filter: blur(20px);
}

.image-container {
    width: 100%;
    height: 300px;
    margin: 1rem 0;
    border-radius: 10px;
    overflow: hidden;
}

.image-container img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* 控制面板样式 */
.control-panel {
    background: var(--card-background);
    border-radius: 20px;
    padding: 2rem;
    margin-top: 2rem;
    backdrop-filter: blur(20px);
}

.quality-control {
    margin-bottom: 1.5rem;
}

input[type="range"] {
    width: 100%;
    margin: 1rem 0;
}

.download-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    width: 100%;
    transition: transform 0.2s ease;
}

.download-btn:hover {
    transform: scale(1.02);
}