body{display:flex;flex-direction:column;font-family:sans-serif;margin:0;min-height:100vh}.container{margin:0 auto;max-width:800px;padding:20px}.site-header{background:#333;color:#fff;padding:1rem 0}.site-footer{background:#eee;margin-top:auto;padding:1rem;text-align:center}h1{color:coral}