body{margin:0;background:#fff;color:#173747;font:18px/1.5 system-ui,sans-serif}main{max-width:42rem;margin:12vh auto;padding:24px}h1{font-size:clamp(1.7rem,5vw,2.4rem);line-height:1.2}a{color:#075ca8;text-underline-offset:.2em}a:focus-visible{outline:3px solid #173747;outline-offset:4px}