:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1c1c1e;
  --muted: #6b6b70;
  --rule: rgba(0, 0, 0, .10);
  --accent: #0a63c9;
  --card: #f6f6f7;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131315;
    --fg: #e8e8ea;
    --muted: #9a9aa1;
    --rule: rgba(255, 255, 255, .14);
    --accent: #6cb2ff;
    --card: #1c1c1f;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0 auto;
  max-width: 44rem;
  padding: 3rem 1.25rem 5rem;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  -webkit-text-size-adjust: 100%;
}

h1 { font-size: clamp(1.6rem, 5vw, 2.1rem); line-height: 1.15; margin: 0 0 .35rem; letter-spacing: -.02em; }
h2 { font-size: 1.15rem; margin: 2.25rem 0 .6rem; letter-spacing: -.01em; }
h3 { font-size: 1rem; margin: 1.5rem 0 .35rem; }
p, li { color: var(--fg); }
ul { padding-left: 1.2rem; }
li { margin: .4rem 0; }

a { color: var(--accent); text-underline-offset: 2px; }
a:hover { text-decoration: none; }

code {
  font: .875em ui-monospace, SFMono-Regular, Menlo, monospace;
  background: var(--card);
  padding: .12em .38em;
  border-radius: 5px;
}

.tagline { color: var(--muted); font-size: 1.05rem; margin: 0 0 2rem; }
.lede { font-size: 1.05rem; }

nav {
  display: flex;
  gap: 1.25rem;
  padding-bottom: 1.25rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--rule);
  font-size: .95rem;
}
nav a { color: var(--muted); text-decoration: none; }
nav a:hover, nav a[aria-current="page"] { color: var(--fg); }

.card {
  background: var(--card);
  border-radius: 12px;
  padding: 1.1rem 1.25rem;
  margin: 1.25rem 0;
}
.card p:first-child { margin-top: 0; }
.card p:last-child { margin-bottom: 0; }

footer {
  margin-top: 3.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: .875rem;
}
footer a { color: var(--muted); }