:root {
  --bg: #fdfdfb;
  --fg: #1a1a1a;
  --muted: #777;
  --link: #1a1a1a;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #161616; --fg: #ddd; --muted: #888; --link: #ddd; }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.6 ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

main {
  max-width: 72ch;
  margin: 0 auto;
  padding: 48px 16px 80px;
}

h1, h2, p, ul { margin: 0 0 1.6em; }
h1, h2 { font-size: inherit; font-weight: bold; }
h2 { margin-bottom: .4em; }

ul { list-style: none; padding: 0; }
li::before { content: "- "; }

a { color: var(--link); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

.muted { color: var(--muted); }