:root {
  color-scheme: light dark;
  --bg: #fafafa;
  --surface: #ffffff;
  --text: #1a1a1a;
  --muted: #5c5c5c;
  --accent: #0969da;
  --border: #e6e6e6;
  --max-width: 42rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --surface: #161b22;
    --text: #f0f6fc;
    --muted: #8b949e;
    --accent: #58a6ff;
    --border: #30363d;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

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

a:hover {
  text-decoration: none;
}

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

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

nav {
  display: flex;
  gap: 1rem;
  font-size: 0.9375rem;
}

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

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

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

.hero {
  margin-bottom: 2.5rem;
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(2rem, 5vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.lead {
  margin: 0;
  font-size: 1.125rem;
  color: var(--muted);
  max-width: 36rem;
}

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

.card h2,
.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
}

.card p:last-child,
.card ul:last-child {
  margin-bottom: 0;
}

.features {
  display: grid;
  gap: 1rem;
  margin: 2rem 0;
}

.features h2 {
  margin: 0 0 1rem;
  font-size: 1.25rem;
}

.feature-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 36rem) {
  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

ul {
  padding-left: 1.25rem;
}

li + li {
  margin-top: 0.35rem;
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.contact-list li + li {
  margin-top: 0.75rem;
}

.contact-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin-bottom: 0.15rem;
}

footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem 2rem;
  color: var(--muted);
  font-size: 0.875rem;
}

footer nav {
  margin-bottom: 0.75rem;
}

.prose h1 {
  margin: 0 0 0.5rem;
  font-size: 2rem;
  letter-spacing: -0.02em;
}

.prose h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.125rem;
}

.prose p,
.prose ul {
  margin: 0 0 1rem;
}

.prose .updated {
  color: var(--muted);
  font-size: 0.9375rem;
}