:root {
  color-scheme: dark;
  --bg: #0e1116;
  --fg: #e6eaf0;
  --muted: #9aa4b2;
  --accent: #22e6c8;
}

body {
  margin: 0 auto;
  padding: 1.5rem;
  max-width: 40rem;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

nav a {
  color: var(--muted);
  text-decoration: none;
}

nav a[aria-current="true"] {
  color: var(--fg);
  font-weight: bold;
}

h1 {
  font-size: clamp(1.75rem, 1rem + 3vw, 3rem);
  line-height: 1.15;
  margin: 0 0 0.75rem;
}

h1 + p {
  color: var(--muted);
  margin: 0 0 2rem;
}

h2 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  padding-left: 0.75rem;
  border-left: 4px solid var(--accent);
}

ol,
ul {
  padding-left: 1.5rem;
}

li + li {
  margin-top: 0.5rem;
}

p.cta {
  margin-top: 2rem;
}

a.start {
  display: inline-block;
  background: var(--accent);
  color: var(--bg);
  font-weight: bold;
  text-decoration: none;
  padding: 0.75rem 1.5rem;
}

footer {
  margin-top: 3rem;
  color: var(--muted);
  font-size: 0.85rem;
}