:root { --text:#1b1f24; --muted:#5f6670; --line:#e3e6ea; --bg:#fafaf8; --accent:#0f766e; }
@media (prefers-color-scheme: dark) {
  :root { --text:#e6e8eb; --muted:#9aa3ad; --line:#30363d; --bg:#14171a; --accent:#5ec4b6; }
}
* { box-sizing:border-box; }
body { margin:0; background:var(--bg); color:var(--text); font:16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width:760px; margin:0 auto; padding:24px 16px 64px; }
nav.top { display:flex; justify-content:space-between; gap:1rem; font-size:.95rem; margin-bottom:1.5rem; }
a { color:var(--accent); }
h1 { font-size:1.8rem; line-height:1.25; margin:0 0 1rem; }
h2 { font-size:1.15rem; margin:2rem 0 .5rem; padding-top:1rem; border-top:1px solid var(--line); }
p, li { overflow-wrap:anywhere; }
ul { padding-left:1.25rem; }
.note { background:rgba(15,118,110,.08); border-left:3px solid var(--accent); padding:.6rem .8rem; }
.stand { color:var(--muted); margin-top:2.5rem; font-size:.9rem; }