:root{font-family:system-ui,sans-serif;color:#202124}body{margin:0}.site-header,main,.site-footer{max-width:1100px;margin:auto;padding:1rem}.site-header{display:flex;justify-content:space-between}nav a{margin-left:1rem}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem}article{padding:1rem;border:1px solid #ddd}img{max-width:100%;height:auto}