body { 
    font-family: Arial, sans-serif; 
    max-width: 800px; 
    margin: 0 auto; 
    padding: 20px;
    line-height: 1.6;
}
pre { 
    background: #f5f5f5; 
    padding: 15px; 
    border-radius: 5px;
    overflow-x: auto;
}
code { 
    background: #f5f5f5; 
    padding: 2px 5px; 
    border-radius: 3px;
}
h1, h2, h3 { 
    color: #333;
    margin-top: 30px;
}
h1 { 
    border-bottom: 2px solid #eee;
    padding-bottom: 10px;
}