html, body {
  margin: 0;
  padding: 0;
  overflow: hidden;
}

canvas {
  display: block;
}

#onboarding {
  position: fixed;
  inset: 0;
  z-index: 10;
  background: #0a0a0f;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: opacity 0.6s ease;
}

#onboarding.hidden {
  opacity: 0;
  pointer-events: none;
}

.onboarding-content {
  text-align: center;
  color: #ddd;
  font-family: 'Helvetica Neue', Arial, sans-serif;
}

.onboarding-content h1 {
  font-size: 3rem;
  font-weight: 300;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  color: #fff;
}

.onboarding-content p {
  font-size: 1rem;
  font-weight: 300;
  color: #888;
  margin-bottom: 3rem;
}

.start-btn {
  display: inline-block;
  padding: 0.8rem 2.5rem;
  border: 1px solid #555;
  border-radius: 100px;
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  color: #aaa;
  transition: all 0.3s ease;
}

.start-btn:hover {
  border-color: #fff;
  color: #fff;
}