:root{color-scheme:light;--paper:#fff8e8;--ink:#263b39;--teal:#174f52;--coral:#cf6553}*{box-sizing:border-box}body{margin:0;background:#f6eddc;color:var(--ink);font:16px/1.65 system-ui,-apple-system,sans-serif}main{max-width:760px;margin:auto;padding:48px 24px 80px}h1,h2{color:var(--teal);line-height:1.25}h1{font-size:2.4rem}section{background:var(--paper);border-radius:20px;padding:20px 24px;margin:18px 0}a{color:#a7453c}nav{display:flex;gap:18px;flex-wrap:wrap}.note{border-left:5px solid var(--coral)}