:root {
  color-scheme: light dark;
  --background: #0d1117;
  --surface: #161b22;
  --border: #30363d;
  --text: #f0f3f6;
  --muted: #9da7b3;
  --accent: #e6b450;
  --accent-text: #111820;
  --link: #79c0ff;
}

* {
  box-sizing: border-box;
}

html {
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
}

a {
  color: var(--link);
}

.container {
  width: min(760px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.header-content {
  display: flex;
  min-height: 4rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  color: var(--text);
  font-size: 1.15rem;
  font-weight: 700;
  text-decoration: none;
}

nav {
  display: flex;
  gap: 1rem;
}

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

nav a[aria-current="page"] {
  color: var(--accent);
}

.hero {
  padding: 4rem 0 2rem;
}

.eyebrow {
  margin: 0 0 0.5rem;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2 {
  line-height: 1.2;
}

h1 {
  margin: 0;
  font-size: clamp(2.25rem, 8vw, 3.5rem);
}

h2 {
  margin-top: 0;
  font-size: 1.35rem;
}

.lede {
  max-width: 42rem;
  color: var(--muted);
  font-size: 1.15rem;
}

section:not(.hero) {
  margin-bottom: 1.25rem;
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: 0.8rem;
  background: var(--surface);
}

li + li {
  margin-top: 0.4rem;
}

.button {
  display: inline-block;
  padding: 0.65rem 1rem;
  border-radius: 0.55rem;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 700;
  text-decoration: none;
}

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

footer {
  margin-top: 3rem;
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  color: var(--muted);
}

@media (prefers-color-scheme: light) {
  :root {
    --background: #f6f8fa;
    --surface: #ffffff;
    --border: #d0d7de;
    --text: #1f2328;
    --muted: #59636e;
    --accent: #9a6700;
    --accent-text: #ffffff;
    --link: #0969da;
  }
}