:root {
  --bg: #0d0d0f;
  --fg: #f5f5f7;
  --muted: #8a8a92;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 1.5rem;
}

main {
  max-width: 40rem;
}

h1 {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.tagline {
  margin-top: 0.75rem;
  font-size: clamp(1rem, 3vw, 1.25rem);
  color: var(--muted);
}