* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body {
    background-color: #f5f5f5;
    color: #333;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 30px;
}

h1 {
    text-align: center;
    margin-bottom: 30px;
    color: #2c3e50;
}

.upload-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 30px;
    padding: 20px;
    border: 2px dashed #ddd;
    border-radius: 8px;
    background-color: #fafafa;
}

.upload-label {
    display: inline-block;
    padding: 12px 24px;
    background: #4a89dc;
    color: white;
    border-radius: 4px;
    cursor: pointer;
    margin-bottom: 20px;
    transition: all 0.3s;
}

.upload-label:hover {
    background: #3a70c0;
}

#image-upload {
    display: none;
}

.quality-control {
    width: 100%;
    max-width: 400px;
    margin-top: 15px;
}

.quality-control label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

#quality {
    width: 100%;
}

.preview-container {
    display: none;
    gap: 20px;
    flex-wrap: wrap;
}

.original-image, .compressed-image {
    flex: 1;
    min-width: 300px;
    padding: 15px;
    border-radius: 8px;
    background-color: #fafafa;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.image-container {
    height: 300px;
    margin: 15px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #eee;
    border-radius: 4px;
    overflow: hidden;
}

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

.image-info {
    font-size: 14px;
    color: #666;
    margin-bottom: 15px;
}

#download-btn {
    padding: 10px 20px;
    background-color: #27ae60;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.3s;
    width: 100%;
}

#download-btn:hover {
    background-color: #219d54;
}

#download-btn:disabled {
    background-color: #95a5a6;
    cursor: not-allowed;
}

h3 {
    color: #2c3e50;
    margin-bottom: 10px;
}

@media (min-width: 768px) {
    .preview-container {
        display: flex;
    }
}