:root { color-scheme: light dark; --green: #147a5e; --text: #1d1d1f; --muted: #5f6368;
  --background: #ffffff; --rule: #d9dcdf; }
@media (prefers-color-scheme: dark) { :root { --green: #4cc39e; --text: #f2f2f2; --muted: #a8adb3;
  --background: #161718; --rule: #3a3d40; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--background); color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif; }
header, main, footer { max-width: 44rem; margin: 0 auto; padding: 0 1rem; }
header { display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; align-items: baseline; padding-top: 1.25rem;
  padding-bottom: .75rem; border-bottom: 1px solid var(--rule); }
header .home { font-weight: 700; font-size: 1.15rem; color: var(--text); text-decoration: none; margin-right: auto; }
nav { display: flex; flex-wrap: wrap; gap: .25rem 1rem; }
a { color: var(--green); }
h1 { font-size: 1.9rem; line-height: 1.2; margin: 2rem 0 1rem; }
h2 { font-size: 1.3rem; margin: 2rem 0 .5rem; }
h3 { font-size: 1.05rem; margin: 1.5rem 0 .25rem; }
ul { padding-left: 1.25rem; }
li { margin: .35rem 0; }
footer { margin-top: 3rem; padding-top: 1rem; padding-bottom: 2rem; border-top: 1px solid var(--rule);
  color: var(--muted); font-size: .9rem; }
h1, h2, h3 { overflow-wrap: break-word; hyphens: auto; }