:root{--bg:#f4f1ea;--fg:#1f2a44;--muted:#5b6682;--card:#fffdf8;--accent:#3b5a9d;--line:#ddd6c6}
@media (prefers-color-scheme:dark){:root{--bg:#0e1424;--fg:#e6e9f2;--muted:#9aa5c2;--card:#161e36;--accent:#9db7f2;--line:#26304f}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.65 ui-rounded,"SF Pro Rounded",system-ui,-apple-system,"Segoe UI",sans-serif}
header,main,footer{max-width:40rem;margin:0 auto;padding:1rem 1.25rem}
header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:.5rem;padding-top:1.5rem}
.brand{font-weight:700;letter-spacing:.01em;color:var(--fg);text-decoration:none}
.brand::before{content:"";display:inline-block;width:.8em;height:.8em;margin-right:.5em;border-radius:50%;background:var(--accent);box-shadow:.25em -.15em 0 0 var(--bg) inset}
nav a{margin-left:1rem;color:var(--muted);text-decoration:none}
nav a:hover,nav a[aria-current]{color:var(--fg);text-decoration:underline}
main{padding-bottom:2.5rem}
h1{font-size:2rem;line-height:1.2;margin:1.5rem 0 .5rem}
h2{font-size:1.2rem;margin:2rem 0 .25rem}
p,li{max-width:36rem}
a{color:var(--accent)}
.lead{font-size:1.2rem;color:var(--muted)}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:1rem 1.25rem;margin:1.5rem 0}
.button{display:inline-block;background:var(--accent);color:var(--bg);padding:.6rem 1.1rem;border-radius:999px;text-decoration:none;font-weight:600}
.button:hover{opacity:.9}
.meta{color:var(--muted);font-size:.95rem}
footer{color:var(--muted);font-size:.9rem;border-top:1px solid var(--line);margin-top:1rem}
footer a{color:var(--muted)}