body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    color: #333;
    background-color: #f5f5f5;
}

header {
    background-color: #2c3e50;
    color: #fff;
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

h1 {
    margin: 0;
    font-size: 2.5rem;
}

main {
    background: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,.1);
}

section {
    margin-bottom: 2rem;
}

h2 {
    color: #2c3e50;
    border-bottom: 2px solid #3498db;
    padding-bottom: .5rem;
}

code {
    background-color: #f8f9fa;
    padding: .2rem .4rem;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
}

footer {
    margin-top: 2rem;
    text-align: center;
    color: #7f8c8d;
    font-size: .9rem;
}