:root {
    --primary-color: #007AFF;
    --background-color: #F5F5F7;
    --text-color: #1D1D1F;
}

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

body {
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.5;
}

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

h1 {
    text-align: center;
    margin-bottom: 2rem;
    font-weight: 600;
}

.upload-section {
    text-align: center;
    margin-bottom: 2rem;
}

.upload-button {
    display: inline-block;
    padding: 1rem 2rem;
    background-color: var(--primary-color);
    color: white;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.upload-button:hover {
    background-color: #0066CC;
}

.support-text {
    margin-top: 1rem;
    color: #86868B;
}

.image-preview {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

.preview-container {
    flex: 1;
    background: white;
    padding: 1rem;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.preview-container img {
    max-width: 100%;
    height: auto;
    margin: 1rem 0;
}

.controls {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

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

.download-button {
    width: 100%;
    padding: 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
}

.download-button:hover {
    background-color: #0066CC;
}