* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, sans-serif; }
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 48px 24px;
}
h1 { font-size: 2.5rem; margin: 0 0 12px; }
p { color: #555; margin: 0 0 24px; }
#cta {
  background: #228be6;
  color: #fff;
  border: 0;
  border-radius: 8px;
  padding: 12px 24px;
  font-size: 1rem;
  cursor: pointer;
}