body {
    max-width: 800px;
    margin: 40px auto;
    padding: 0 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
}
code {
    background: #f4f4f4;
    padding: 2px 4px;
    border-radius: 4px;
}
pre {
    background: #f4f4f4;
    padding: 1em;
    overflow-x: auto;
    border-radius: 4px;
}
h1, h2, h3 {
    color: #2c3e50;
}