html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: Arial, sans-serif;

  scroll-snap-type: y mandatory;
  overflow-y: scroll;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}

.top-nav {
  position: fixed;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 20px;
  z-index: 1000;
  background: rgba(0,0,0,0.5);
  padding: 0.5rem 1rem;
  border-radius: 10px;
}

.menu-item {
  color: white;
  font-weight: bold;
  text-decoration: none;
  transition: color 0.3s, transform 0.3s;
}

.menu-item:hover {
  color: #ffdd57;
  transform: scale(1.2);
}