body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #f5f5f5;
}

.drop-zone {
    border: 2px dashed #ccc;
    border-radius: 8px;
    padding: 40px;
    text-align: center;
    background-color: white;
    transition: border-color 0.3s ease;
    cursor: pointer;
}

.drop-zone.dragover {
    border-color: #4CAF50;
    background-color: #f0f9f0;
}

.progress-container {
    margin-top: 20px;
    display: none;
}

.progress-bar {
    width: 100%;
    height: 20px;
    background-color: #f0f0f0;
    border-radius: 10px;
    overflow: hidden;
}

.progress {
    width: 0%;
    height: 100%;
    background-color: #4CAF50;
    transition: width 0.3s ease;
}

.controls {
    margin-top: 20px;
    display: none;
    gap: 10px;
    align-items: center;
}

select {
    padding: 8px;
    border-radius: 4px;
    border: 1px solid #ccc;
}

button {
    padding: 8px 16px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #45a049;
}

button:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}

#outline {
    margin-top: 20px;
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    display: none;
}

.status {
    margin-top: 10px;
    font-style: italic;
    color: #666;
}

.outline-item {
    display: flex;
    align-items: center;
    gap: 5px;
    margin: 5px 0;
}

.level-icon {
    width: 20px;
    height: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: #4CAF50;
    color: white;
    font-size: 12px;
}

.level-preview {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    margin-left: 10px;
    padding: 4px 8px;
    background-color: #f0f0f0;
    border-radius: 4px;
}

ul {
    list-style: none;
    padding-left: 20px;
}

li {
    margin: 5px 0;
}

.github-icon {
    display: inline-block;
    width: 24px;
    height: 24px;
    background-image: url('data:image/svg+xml;charset=utf-8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12 .297c-6.63 0-12 5.373-12 12 0 5.303 3.438 9.8 8.205 11.385.6.113.82-.258.82-.577 0-.285-.01-1.04-.015-2.04-3.338.724-4.042-1.61-4.042-1.61C4.422 18.07 3.633 17.7 3.633 17.7c-1.087-.744.084-.729.084-.729 1.205.084 1.838 1.236 1.838 1.236 1.07 1.835 2.809 1.305 3.495.998.108-.776.417-1.305.76-1.605-2.665-.3-5.466-1.332-5.466-5.93 0-1.31.465-2.38 1.235-3.22-.135-.303-.54-1.523.105-3.176 0 0 1.005-.322 3.3 1.23.96-.267 1.98-.399 3-.405 1.02.006 2.04.138 3 .405 2.28-1.552 3.285-1.23 3.285-1.23.645 1.653.24 2.873.12 3.176.765.84 1.23 1.91 1.23 3.22 0 4.61-2.805 5.625-5.475 5.92.42.36.81 1.096.81 2.22 0 1.606-.015 2.896-.015 3.286 0 .315.21.69.825.57C20.565 22.092 24 17.592 24 12.297c0-6.627-5.373-12-12-12"/></svg>');
    background-repeat: no-repeat;
    background-size: contain;
    vertical-align: middle;
    margin-left: 10px;
}

.github-btn {
    text-decoration: none;
    color: #333;
}

.github-btn:hover {
    text-decoration: underline;
}