body {
    font-family: system-ui, -apple-system, sans-serif;
    margin: 0;
    padding: 2rem;
    background: #f5f5f5;
    color: #333;
}
.container {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
h1 {
    margin-top: 0;
    color: #2d2d2d;
}
.key {
    background: #e9e9e9;
    padding: 2px 8px;
    border-radius: 4px;
    border: 1px solid #ccc;
    font-family: monospace;
}