:root {
  --bg: #fcfcfc;
  --fg: #1b1b1b;
  --muted: #666;
  --line: #e4e4e4;
  --code: #f2f2f2;
  --accent: #2457c5;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151515;
    --fg: #e6e6e6;
    --muted: #949494;
    --line: #2b2b2b;
    --code: #1f1f1f;
    --accent: #7aa2f7;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.6 system-ui, sans-serif;
}
main { max-width: 44rem; margin: 0 auto; padding: 3rem 1rem 5rem; }
a { color: var(--accent); }

h1 { font-size: 1.6rem; margin: 0 0 .25rem; }
h2 { font-size: 1.1rem; margin: 2.5rem 0 .5rem; padding-top: .5rem; border-top: 1px solid var(--line); }
h3 { font-size: .95rem; margin: 1.5rem 0 .25rem; }
p, ul, ol, dl, pre, table { margin: 0 0 .9rem; }
.lead { color: var(--muted); font-size: 1.05rem; }
.muted { color: var(--muted); }

code, pre { font: 13px/1.5 ui-monospace, monospace; }
code { background: var(--code); padding: .05rem .3rem; border-radius: 3px; }
pre { background: var(--code); padding: .75rem 1rem; border-radius: 4px; overflow-x: auto; }
pre code { background: none; padding: 0; }

dt { font-weight: 600; }
dd { margin: 0 0 .5rem 1rem; color: var(--muted); }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: .3rem .5rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 500; }

nav.toc { columns: 2; font-size: 14px; margin: 1.5rem 0; }
nav.toc a { display: block; text-decoration: none; }
nav.toc a:hover { text-decoration: underline; }

.note { border-left: 3px solid var(--accent); padding: .1rem .75rem; color: var(--muted); }