*{margin:0;padding:0;box-sizing:border-box}body{font-family:Arial,sans-serif;line-height:1.6;max-width:800px;margin:20px auto}h1,h2,h3,p{margin-bottom:1rem}a{color:#06c;text-decoration:none}a:hover{text-decoration:underline}.btn{background:#06c;color:#fff;padding:8px 16px;border:none;border-radius:4px;cursor:pointer;text-decoration:none;display:inline-block;margin:4px}.btn:hover{background:#0052a3}form{margin:1rem 0}input,textarea{width:100%;padding:8px;margin:4px 0;border:1px solid #ccc;border-radius:4px}.container{margin:20px 0}.nav{margin-bottom:2rem}.nav a{margin-right:1rem}