body {
    background-color: #f0f0f0;
    margin: 0;
    padding: 20px;
    font-family: Arial, sans-serif;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header {
    text-align: center;
    margin-bottom: 30px;
}

.header h1 {
    color: #1890ff;
}

.instructions {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.controls {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: opacity 0.2s;
    user-select: none;
    pointer-events: auto;
}

.btn:hover {
    opacity: 0.8;
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(1px);
}

.primary {
    background-color: #1890ff;
    color: white;
    position: relative;
    z-index: 1;
}

.warning {
    background-color: #ff4d4f;
    color: white;
}

.success {
    background-color: #52c41a;
    color: white;
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    padding: 20px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.image-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.2s;
}

.image-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.image-item img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    margin-bottom: 10px;
    object-fit: contain;
}

.download-btn {
    background-color: #1890ff;
    color: white;
    padding: 5px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
}

.download-btn:hover {
    opacity: 0.8;
}

.progress-text {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 15px 30px;
    border-radius: 5px;
    font-size: 16px;
    z-index: 1000;
}

/* 修改选择按钮样式 */
label.btn {
    display: inline-block;
    margin: 0;
    cursor: pointer;
}

/* 隐藏文件输入框但保持其可访问性 */
input[type="file"] {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    border: 0;
}