.scroll-arrow {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 2rem;
  color: white;
  animation: bounce 1s infinite;
  cursor: pointer;
  transition: opacity 0.5s;
}

@keyframes bounce {
  0%, 100% {
    transform: translate(-50%, 0);
  }
  50% {
    transform: translate(-50%, -10px);
  }
}

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