body {
    font-family: monospace;
    line-height: 1.7;
    max-width: 720px;
    margin: 40px auto;
    padding: 0 20px;
    color: #000;
    background: #fff;
}

pre {
    border: 1px dashed #555;
    padding: 12px;
    overflow-x: auto; 
}

img {
    max-width: 100%;
}