:root{color-scheme:light dark}body{margin:0;font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif;background:#fff;color:#000}main,footer{max-width:680px;margin:0 auto;padding:32px 20px}h1{font-size:2.2rem;margin:0 0 .2em}h2{margin-top:2em;font-size:1.2rem}a{color:inherit}.btn{display:inline-block;border:2px solid currentColor;padding:10px 18px;text-decoration:none;font-weight:600}footer{border-top:1px solid #000;font-size:.9rem}.tbd{background:#000;color:#fff;padding:0 4px}@media(prefers-color-scheme:dark){body{background:#000;color:#fff}footer{border-color:#fff}.tbd{background:#fff;color:#000}}