:root {
  color-scheme: light dark;
  --bg: #f6f6f4;
  --surface: #ffffff;
  --line: #e2e2dd;
  --text: #1a1a18;
  --muted: #5f5f5a;
  --accent: #a8431d;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121214;
    --surface: #1a1a1d;
    --line: #2f2f35;
    --text: #eeeef1;
    --muted: #a0a0a9;
    --accent: #e8804f;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0 auto;
  padding: 4rem 1.5rem 6rem;
  max-width: 42rem;
  background: var(--bg);
  color: var(--text);
  font: 400 1rem/1.65 ui-sans-serif, -apple-system, "SF Pro Text", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-underline-offset: 2px; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px; }

header { display: flex; align-items: center; gap: 0.875rem; margin-bottom: 2.5rem; }
header img { width: 44px; height: 44px; border-radius: 10px; }
header b { font-size: 1.25rem; font-weight: 600; letter-spacing: -0.02em; }

h1 { font-size: 1.9rem; line-height: 1.2; font-weight: 600; letter-spacing: -0.025em; margin: 0 0 0.75rem; text-wrap: balance; }
h2 { font-size: 1.0625rem; font-weight: 600; margin: 2.5rem 0 0.625rem; letter-spacing: -0.01em; }
p { margin: 0 0 1rem; text-wrap: pretty; }
.lede { font-size: 1.0625rem; color: var(--muted); }
ul { margin: 0 0 1rem; padding-left: 1.125rem; }
li { margin-bottom: 0.4375rem; }
code { font: 500 0.875em ui-monospace, SFMono-Regular, Menlo, monospace; color: var(--accent); }

.card {
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: var(--surface);
  padding: 1.25rem 1.375rem;
  margin: 1.5rem 0;
}
.card p:last-child { margin-bottom: 0; }

footer {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.875rem;
}