:root{
  --bg:#F3F5F7; --surface:#FFFFFF; --line:#D9DEE4; --fg:#12161B; --muted:#56606D; --accent:#007A8A;
  --display:"Instrument Serif", "Iowan Old Style", Georgia, serif;
  --body:"Hanken Grotesk", "Segoe UI", system-ui, sans-serif;
  --mono:"JetBrains Mono", Consolas, "Courier New", monospace;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0E1115; --surface:#151A20; --line:#252C35; --fg:#E6E9EE; --muted:#8B94A3; --accent:#00E5FF; color-scheme:dark}}
:root[data-theme="dark"]{--bg:#0E1115; --surface:#151A20; --line:#252C35; --fg:#E6E9EE; --muted:#8B94A3; --accent:#00E5FF; color-scheme:dark}
*{box-sizing:border-box}
body{background:var(--bg);color:var(--fg);font-family:var(--body);font-size:17px;line-height:1.65;margin:0;-webkit-font-smoothing:antialiased}
.wrap{max-width:760px;margin:0 auto;padding:40px 16px 64px}
a{color:var(--accent)}
.back{font-family:var(--mono);font-size:13px;text-decoration:none}
h1{font-family:var(--display);font-weight:400;font-size:clamp(40px,7vw,60px);line-height:1.05;margin:24px 0 8px}
h2{font-size:19px;margin:36px 0 8px}
p,ul,dl{margin:0 0 12px}
ul{padding-left:20px}
.sub{color:var(--muted)}
dl{display:grid;grid-template-columns:minmax(0,13em) minmax(0,1fr);gap:6px 20px}
dt{color:var(--muted)}
dd{margin:0;overflow-wrap:anywhere}
@media (max-width:560px){dl{grid-template-columns:1fr} dd{margin-bottom:8px}}
.todo{background:#FFE58F;color:#3D2E00;padding:0 4px;border-radius:3px}
footer{margin-top:48px;border-top:1px solid var(--line);padding-top:16px;color:var(--muted);font-size:14px}