:root {
  color-scheme: light dark;
  --bg: #f7f8fb;
  --fg: #101828;
  --muted: #667085;
  --card: #ffffff;
  --accent: #0f766e;
  --border: #d0d5dd;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1018;
    --fg: #f2f4f7;
    --muted: #98a2b3;
    --card: #111827;
    --accent: #5eead4;
    --border: #344054;
  }
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.65;
}

main {
  max-width: 820px;
  margin: 0 auto;
  padding: 40px 20px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: clamp(24px, 5vw, 44px);
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(34px, 6vw, 52px);
  line-height: 1.04;
}

h2 {
  margin-top: 34px;
  font-size: 20px;
}

p {
  margin: 14px 0;
}

a {
  color: var(--accent);
  font-weight: 650;
  text-decoration: none;
}

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