:root {
  --bg: #fbfbfa;
  --text: #1d1d1f;
  --muted: #5f5f66;
  --rule: #e2e2e0;
  --link: #0a5bd3;
  --panel: #f1f1ef;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161618;
    --text: #ececee;
    --muted: #a1a1a8;
    --rule: #2e2e32;
    --link: #6aa6ff;
    --panel: #1f1f22;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

main {
  max-width: 680px;
  margin: 0 auto;
  padding: 40px 16px 64px;
}

h1 { font-size: 1.9rem; line-height: 1.2; margin: 0 0 4px; }
h2 { font-size: 1.15rem; margin: 2.2em 0 0.4em; }
p, ul { margin: 0 0 1em; }
li { margin-bottom: 0.35em; }
a { color: var(--link); }

.meta { color: var(--muted); font-size: 0.95rem; margin-bottom: 2em; }

.summary {
  background: var(--panel);
  border-radius: 10px;
  padding: 14px 18px;
  margin-bottom: 1.5em;
}
.summary p:last-child { margin-bottom: 0; }

footer {
  border-top: 1px solid var(--rule);
  margin-top: 3em;
  padding-top: 1em;
  color: var(--muted);
  font-size: 0.9rem;
}