:root {
  --bg: #fbfbf9;
  --fg: #1c1d1b;
  --muted: #6b6d68;
  --line: #e4e4df;
  --accent: #2e8f61;
  --card: #ffffff;
  --on-accent: #ffffff;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121312;
    --fg: #ecedea;
    --muted: #9a9c97;
    --line: #2a2c29;
    --accent: #5cbd8f;
    --card: #1b1c1a;
    --on-accent: #0d1a13;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
}
main {
  max-width: 38rem;
  margin: 0 auto;
  padding: 18vh 1.25rem 4rem;
}
main.text { padding-top: 4rem; }
h1 { font-size: 2.6rem; line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 1rem; font-weight: 650; }
h2 { font-size: 1.15rem; margin: 2.2rem 0 0.4rem; }
p, li { color: var(--fg); }
/* Three sizes only: the title, headings, and text. */
.lead { color: var(--muted); margin: 0 0 2.5rem; }
.muted { color: var(--muted); }
.mark { display: inline-block; width: 0.55em; height: 0.55em; border: 2px solid var(--accent); border-radius: 50%; margin-right: 0.35em; vertical-align: 0.08em; }
a { color: var(--accent); text-underline-offset: 0.15em; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 1.1rem 1.25rem; margin: 1.5rem 0; }
.card p { margin: 0.3rem 0; }
ol { padding-left: 1.3rem; }
button, a.button {
  font: inherit; color: var(--on-accent); background: var(--accent); border: 0; border-radius: 10px;
  padding: 0.6rem 1.1rem; cursor: pointer; text-decoration: none; display: inline-block; margin: 0 0.4rem 0.4rem 0;
}
[data-copy-link] { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
button:focus-visible, a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
footer { max-width: 38rem; margin: 0 auto; padding: 2rem 1.25rem 3rem; color: var(--muted); border-top: 1px solid var(--line); }
footer a { color: var(--muted); margin-right: 1.2rem; }
dl { display: grid; grid-template-columns: max-content 1fr; gap: 0.3rem 1.2rem; }
dt { color: var(--muted); }
dd { margin: 0; }