:root{color-scheme:light dark;--bg:#fafafa;--fg:#1a1a1a;--muted:#5f6368;--accent:#0b5fff;--line:#e3e3e3;--card:#fff}
@media(prefers-color-scheme:dark){:root{--bg:#111315;--fg:#ececec;--muted:#a0a4a8;--accent:#6ea0ff;--line:#2a2e33;--card:#1a1d21}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
header{border-bottom:1px solid var(--line);background:var(--card)}header .in{max-width:760px;margin:0 auto;padding:14px 20px;display:flex;gap:18px;align-items:center;flex-wrap:wrap}
header a{color:var(--fg);text-decoration:none}header .brand{font-weight:700}header nav a{color:var(--muted);margin-right:14px}
main{max-width:760px;margin:0 auto;padding:32px 20px 64px}h1{font-size:1.9rem;line-height:1.2;margin:0 0 .4em}h2{font-size:1.25rem;margin:1.8em 0 .5em}h3{font-size:1.05rem;margin:1.4em 0 .4em}
p,li{max-width:70ch}a{color:var(--accent)}.muted{color:var(--muted)}.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px 20px;margin:14px 0}
table{border-collapse:collapse;width:100%;font-size:.95rem}th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);vertical-align:top}th{color:var(--muted);font-weight:600}
.todo{background:#fff3cd;color:#5c4400;border:1px solid #ffe08a;border-radius:6px;padding:0 6px}@media(prefers-color-scheme:dark){.todo{background:#3a2f00;color:#ffe08a;border-color:#6b5600}}
footer{border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}footer .in{max-width:760px;margin:0 auto;padding:18px 20px}footer a{color:var(--muted)}