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

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
  color: #fff;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  letter-spacing: 0.08em;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.hello {
  font-size: clamp(1.5rem, 5vw, 2.5rem);
  margin-bottom: 1rem;
}

.tagline {
  font-size: clamp(1rem, 3vw, 1.25rem);
  opacity: 0.85;
  margin-bottom: 2rem;
}

.hint {
  font-size: 0.9rem;
  opacity: 0.6;
}