body{max-width:48rem;margin:0 auto;padding:1rem;font-family:system-ui,sans-serif;line-height:1.6;color:#222}header{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding-block:1rem;border-bottom:1px solid #ccc}nav{display:flex;gap:1rem}main{min-height:60vh;padding-block:2rem}footer{padding-block:1rem;border-top:1px solid #ccc;color:#666}a{color:#075ea8}