*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, sans-serif;
  background: #fff;
  color: #1a1a1a;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

main { max-width: 480px; text-align: center; }

h1 { font-size: 2rem; margin-bottom: .5rem; }

.cta {
  display: inline-block;
  margin-top: 1.5rem;
  padding: .75rem 1.5rem;
  background: #1a1a1a;
  color: #fff;
  border-radius: .5rem;
  text-decoration: none;
  font-weight: 600;
}