:root {
  color-scheme: light dark;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --bg: #ffffff;
  --rule: #d2d2d7;
  --link: #0071e3;
}
@media (prefers-color-scheme: dark) {
  :root { --text: #f5f5f7; --muted: #a1a1a6; --bg: #000000; --rule: #424245; --link: #2997ff; }
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
}
main { max-width: 680px; margin: 0 auto; padding: 48px 16px 32px; }
h1 { font-size: 2em; line-height: 1.15; margin: 0 0 4px; }
h2 { font-size: 1.2em; margin: 2em 0 0.4em; }
p, li { margin: 0 0 0.8em; }
ul, ol { padding-left: 1.2em; }
a { color: var(--link); }
.muted { color: var(--muted); }
.summary { border-left: 3px solid var(--rule); padding-left: 16px; }
.app { display: flex; align-items: center; gap: 16px; margin-bottom: 24px; }
.app img { width: 72px; height: 72px; border-radius: 16px; }
.app p { margin: 0; }
footer { max-width: 680px; margin: 0 auto; padding: 16px 16px 48px; border-top: 1px solid var(--rule); }
footer a { margin-right: 20px; }