:root {
    --primary-color: #1976d2;
    --primary-light: #42a5f5;
    --primary-dark: #1565c0;
    --text-color: #333;
    --background-color: #f5f5f5;
    --border-radius: 8px;
    --spacing: 20px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing);
}

h1 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 30px;
}

h2 {
    color: var(--primary-dark);
    margin-bottom: 20px;
}

.main-content {
    display: grid;
    gap: var(--spacing);
    grid-template-columns: 1fr;
}

.upload-section, .settings-section, .preview-section {
    background: white;
    padding: var(--spacing);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.upload-area {
    border: 2px dashed var(--primary-light);
    border-radius: var(--border-radius);
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-area:hover {
    border-color: var(--primary-color);
    background-color: rgba(25, 118, 210, 0.05);
}

.upload-text {
    color: var(--primary-color);
}

.upload-text svg {
    margin-bottom: 10px;
}

.setting-item {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.setting-item label {
    min-width: 100px;
}

input[type="range"] {
    flex: 1;
    height: 6px;
    background: var(--primary-light);
    border-radius: 3px;
    outline: none;
}

input[type="number"] {
    width: 100px;
    padding: 5px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.preview-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing);
}

.preview-item {
    text-align: center;
}

.image-container {
    margin: 10px 0;
    min-height: 200px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.image-container img {
    max-width: 100%;
    height: auto;
    display: block;
}

.image-info {
    font-size: 0.9em;
    color: #666;
    margin: 10px 0;
}

.primary-button, .secondary-button {
    padding: 10px 20px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
}

.primary-button {
    background-color: var(--primary-color);
    color: white;
}

.primary-button:hover {
    background-color: var(--primary-dark);
}

.primary-button:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

.secondary-button {
    background-color: white;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.secondary-button:hover {
    background-color: rgba(25, 118, 210, 0.05);
}

.secondary-button:disabled {
    border-color: #ccc;
    color: #ccc;
    cursor: not-allowed;
}

@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .preview-container {
        grid-template-columns: 1fr;
    }
}