:root { color-scheme: light dark; --fg:#1b1f24; --bg:#fbfbfa; --ac:#3a6ea5; }
@media (prefers-color-scheme: dark){ :root{ --fg:#e7e7e4; --bg:#16181c; --ac:#8ab4f8; } }
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);
 font:16px/1.6 ui-sans-serif,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
main{max-width:34rem;margin:14vh auto;padding:0 1.25rem}
h1{font-size:1.6rem;margin:.6rem 0 .2rem;letter-spacing:-.01em}
p{opacity:.8}
a{color:var(--ac);text-decoration:none}
a:hover{text-decoration:underline}
ul{padding-left:1.1rem}
footer{margin-top:2.5rem;font-size:.85rem;opacity:.55}
.mark{display:block}