*, *::before, *::after { box-sizing: border-box; }
:root {
  --bg: #fafaf8;
  --fg: #1d1d1f;
  --muted: #5f6368;
  --card: #ffffff;
  --border: #e3e3e0;
  --accent: #2f6f4f;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141414;
    --fg: #ececec;
    --muted: #a0a0a0;
    --card: #1e1e1e;
    --border: #2e2e2e;
    --accent: #7cc49b;
  }
}
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
.wrap { max-width: 44rem; margin: 0 auto; padding: 2.5rem 1.25rem 2rem; }
header { margin-bottom: 2rem; }
h1 { font-size: 1.9rem; line-height: 1.25; margin: 0 0 .4rem; }
h2 { font-size: 1.2rem; margin: 2rem 0 .5rem; }
p { margin: 0 0 1rem; }
.lead { color: var(--muted); font-size: 1.1rem; margin: 0; }
a { color: var(--accent); }
.back { display: inline-block; margin-bottom: 1.5rem; text-decoration: none; font-size: .95rem; }
.back:hover { text-decoration: underline; }
.cards { display: grid; gap: 1rem; }
.card {
  display: block;
  padding: 1.25rem 1.4rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: inherit;
  text-decoration: none;
  transition: border-color .15s, transform .15s;
}
.card:hover, .card:focus-visible { border-color: var(--accent); transform: translateY(-1px); }
.card h2 { margin: 0 0 .35rem; color: var(--accent); }
.card p { margin: 0; color: var(--muted); }
.badge {
  display: inline-block;
  font-size: .8rem;
  padding: .1rem .55rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  margin-top: .75rem;
}
ol, ul { padding-left: 1.3rem; margin: 0 0 1rem; }
li { margin-bottom: .35rem; }
footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: .9rem;
}