body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.6;color:#333;max-width:800px;margin:0 auto;padding:20px;background:#fff}h1{text-align:center;font-size:2.5em;margin:40px 0;color:#000}h2{font-size:1.5em;margin:30px 0 20px;color:#000}p{margin:15px 0;font-size:16px}.center{text-align:center}.highlight{background-color:#ff0;padding:2px 4px}.example{background-color:#f5f5f5;border-left:4px solid #ddd;padding:15px;margin:20px 0;font-family:monospace}.bad-example{border-left-color:#ff6b6b}.good-example{border-left-color:#51cf66}footer{margin-top:60px;padding-top:20px;border-top:1px solid #eee;text-align:center;color:#666;font-size:14px}a{color:#06c;text-decoration:none}a:hover{text-decoration:underline}