:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #5a5a5a;
  --accent: #2a5fd8;
  --border: #e2e2e2;
  --card-bg: #f7f7f8;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --fg: #ededed;
    --muted: #a8a8a8;
    --accent: #7aa2ff;
    --border: #2e2e2e;
    --card-bg: #1c1c1e;
  }
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
}

body {
  margin: 0;
  padding: 2.5rem 1.25rem 4rem;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  font-size: 17px;
}

.wrap {
  max-width: 65ch;
  margin: 0 auto;
}

h1 {
  font-size: 1.9rem;
  margin: 0 0 0.5rem;
  letter-spacing: -0.01em;
}

h2 {
  font-size: 1.25rem;
  margin: 2.25rem 0 0.75rem;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.05rem;
  margin: 1.5rem 0 0.4rem;
}

p {
  margin: 0 0 1rem;
}

ul, ol {
  margin: 0 0 1rem;
  padding-left: 1.4rem;
}

li {
  margin-bottom: 0.4rem;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover {
  opacity: 0.85;
}

.tagline {
  color: var(--muted);
  font-size: 1.05rem;
  margin-bottom: 1.75rem;
}

.updated {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
}

.card dl {
  margin: 0;
}

.card dt {
  color: var(--muted);
  font-size: 0.85rem;
  margin: 0.75rem 0 0.15rem;
}

.card dt:first-child {
  margin-top: 0;
}

.card dd {
  margin: 0 0 0.25rem;
}

.nav {
  display: flex;
  gap: 1.25rem;
  margin-bottom: 2rem;
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0 1.5rem;
}

footer {
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 420px) {
  body {
    padding: 1.75rem 1rem 3rem;
  }
}