:root {
  color-scheme: light dark;
  --ink: #1a1a1a;
  --muted: #63666b;
  --line: #e2e2e2;
  --bg: #ffffff;
  --card: #fafafa;
  --accent: #2453ff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eef0f3;
    --muted: #a3a7ad;
    --line: #2c2f33;
    --bg: #101113;
    --card: #17181b;
    --accent: #6f92ff;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.55;
}
.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 56px 24px 80px;
}
.eyebrow {
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin: 0 0 8px;
}
h1 {
  font-size: 30px;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}
p.lead {
  color: var(--muted);
  margin: 0 0 32px;
  font-size: 15px;
}
.back {
  display: inline-block;
  margin-bottom: 28px;
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
}
.back:hover { color: var(--accent); }
.card-list {
  display: grid;
  gap: 12px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.card-list a.category {
  display: block;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--card);
  color: var(--ink);
  text-decoration: none;
  transition: border-color .15s ease;
}
.card-list a.category:hover { border-color: var(--accent); }
.card-list a.category .name { font-weight: 600; font-size: 16px; }
.card-list a.category .count { display: block; color: var(--muted); font-size: 13px; margin-top: 4px; }

ul.certs {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}
ul.certs li {
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--card);
}
ul.certs a { color: var(--accent); text-decoration: none; font-weight: 500; }
ul.certs a:hover { text-decoration: underline; }

.cert-figure {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--card);
  padding: 18px;
  margin: 0 0 20px;
}
.cert-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 6px;
}
.cert-figure figcaption {
  margin-top: 12px;
  font-size: 14px;
  font-weight: 500;
}