:root {
  color-scheme: light dark;
  --bg: #0f1115;
  --fg: #e6e8eb;
  --muted: #9aa1ac;
  --accent: #5cc8ff;
  --card: #171a21;
  --border: #262b35;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
}

header {
  border-bottom: 1px solid var(--border);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

header .brand {
  font-weight: 600;
  letter-spacing: 0.02em;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 1.25rem;
  font-size: 0.95rem;
}

nav a:hover,
nav a.active {
  color: var(--accent);
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

h1 {
  font-size: 1.9rem;
  margin-bottom: 0.5rem;
}

p {
  color: var(--muted);
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  margin-top: 1.5rem;
}

.card h2 {
  margin-top: 0;
  font-size: 1.1rem;
}

.card ul {
  color: var(--muted);
  padding-left: 1.2rem;
}

footer {
  border-top: 1px solid var(--border);
  padding: 1.25rem 1.5rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}

#build-marker {
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}