:root {
  color-scheme: light dark;
  --bg: #0f1115;
  --card: #171a21;
  --text: #f3f4f6;
  --muted: #9ca3af;
  --accent: #6366f1;
  --border: #2a2f3a;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f8fafc;
    --card: #ffffff;
    --text: #111827;
    --muted: #6b7280;
    --border: #e5e7eb;
  }
}

* {
  box-sizing: border-box;
}

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

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 20px 64px;
}

h1 {
  margin: 0 0 8px;
  font-size: 2rem;
  line-height: 1.2;
}

.subtitle {
  margin: 0 0 32px;
  color: var(--muted);
}

section {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 20px;
}

h2 {
  margin: 0 0 12px;
  font-size: 1.125rem;
}

ol,
ul {
  margin: 0;
  padding-left: 1.25rem;
}

li + li {
  margin-top: 8px;
}

p {
  margin: 0 0 12px;
}

p:last-child {
  margin-bottom: 0;
}

.note {
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: 8px;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.25);
  font-size: 0.95rem;
}

footer {
  margin-top: 28px;
  color: var(--muted);
  font-size: 0.9rem;
}

footer nav {
  margin-bottom: 16px;
}

footer nav a + a {
  margin-left: 16px;
}

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

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

.links li + li {
  margin-top: 12px;
}

.links a {
  font-size: 1.05rem;
  text-decoration: none;
}

.links a:hover {
  text-decoration: underline;
}