:root{--bg:#fbfaf7;--fg:#1d2433;--muted:#5b6478;--line:#e3e0d8;--card:#ffffff;--accent:#2b5fd9;--accent-fg:#ffffff;--note:#fff6dc;--note-line:#ecd58a}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#12161f;--fg:#e8ebf2;--muted:#9aa3b8;--line:#2a3142;--card:#181d29;--accent:#7aa2ff;--accent-fg:#0b1020;--note:#2a2415;--note-line:#5a4a1c}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
a{color:var(--accent)}
.wrap{max-width:720px;margin:0 auto;padding:0 16px}
header.site{border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:14px;padding-bottom:14px;flex-wrap:wrap}
.brand{font-weight:700;font-size:19px;color:var(--fg);text-decoration:none;letter-spacing:-.01em}
.brand span{color:var(--accent)}
nav a{margin-left:16px;color:var(--muted);text-decoration:none;font-size:15px}
nav a:hover{color:var(--fg)}
main{padding:32px 0 48px}
h1{font-size:34px;line-height:1.2;margin:0 0 12px;letter-spacing:-.02em}
h2{font-size:22px;line-height:1.3;margin:36px 0 10px;letter-spacing:-.01em}
h3{font-size:17px;margin:22px 0 4px}
p,ul,ol{margin:0 0 14px}
ul,ol{padding-left:22px}
li{margin-bottom:6px}
.lead{font-size:20px;color:var(--muted);margin-bottom:20px}
.eyebrow{font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);font-weight:600;margin:0 0 8px}
.meta{color:var(--muted);font-size:15px}
.note{background:var(--note);border:1px solid var(--note-line);border-radius:10px;padding:12px 14px;margin:18px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin:12px 0}
.card h3{margin-top:0}
.btn{display:inline-block;background:var(--accent);color:var(--accent-fg);padding:10px 16px;border-radius:10px;text-decoration:none;font-weight:600}
footer{border-top:1px solid var(--line);color:var(--muted);font-size:14px}
footer .wrap{padding-top:20px;padding-bottom:28px}
footer a{color:var(--muted)}
@media (max-width:520px){h1{font-size:28px}.lead{font-size:18px}nav a{margin-left:0;margin-right:14px}}