:root{--bg:#F7F8F5;--sf:#fff;--ink:#182522;--mut:#64736E;--line:#E6EAE6;--teal:#0A6E66;--tint:#E3F1EF}
@media (prefers-color-scheme:dark){:root{--bg:#101A1A;--sf:#1B2826;--ink:#EEF2EF;--mut:#A3B0AB;--line:#2B3A37;--teal:#4FB8AE;--tint:#1F3A37}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 -apple-system,system-ui,"Segoe UI",sans-serif}
header,main,footer{max-width:44rem;margin:0 auto;padding:0 1rem}
header{display:flex;gap:1rem;align-items:center;justify-content:space-between;padding-top:1rem;padding-bottom:1rem}
header strong{font-size:1.125rem}
nav{display:flex;gap:1rem;flex-wrap:wrap}
a{color:var(--teal);text-underline-offset:2px}
main{display:flex;flex-direction:column;gap:1rem;padding-bottom:2rem}
h1,h2,p,ul{margin:0}
h1{font-size:1.75rem;line-height:1.25;letter-spacing:-.02em}
h2{font-size:1.125rem;line-height:1.5}
.meta{font-size:.8125rem;color:var(--mut)}
.card{background:var(--sf);border:1px solid var(--line);border-radius:16px;padding:1.25rem;display:flex;flex-direction:column;gap:.75rem}
.ok{background:var(--tint);border-color:transparent}
ul{padding-left:1.25rem;display:flex;flex-direction:column;gap:.375rem}
footer{padding-bottom:2rem;color:var(--mut);font-size:.875rem}