:root {
  color-scheme: light dark;
  --ink: #12161c;
  --bg: #ffffff;
  --muted: #5b6472;
  --accent: #2f6df6;
}

@media (prefers-color-scheme: dark) {
  :root { --ink: #e7ecf3; --bg: #0b0e12; --muted: #93a0b4; --accent: #6ea0ff; }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

main { max-width: 720px; margin: 0 auto; padding: 48px 22px; }
h1 { font-size: clamp(28px, 5vw, 44px); letter-spacing: -0.02em; margin: 0 0 12px; }
a { color: var(--accent); }