.mouse-btn {
  margin: 10px auto;
  width: 40px;
  height: 80px;
  border: 3px solid rgba(122, 122, 124, 0.918);
  border-radius: 20px;
  display: flex;
}

.mouse-scroll {
  display: block;
  width: 20px;
  height: 20px;
  background: linear-gradient(170deg, rgba(122, 122, 124, 0.918), rgb(123, 124, 124));
  border-radius: 50%;
  margin: auto;
  animation: scrolling13 1s linear infinite;
}

@keyframes scrolling13 {
  0% {
    opacity: 0;
    transform: translateY(-20px);
  }

  100% {
    opacity: 1;
    transform: translateY(20px);
  }
}