.scroll-top {
  position: fixed;   
  bottom: 30px;     
  right: 40px;       
  width: 40px;
  height: 30px;
  background-color: rgba(31, 32, 38, 0.6);
  color: #28d8ff;
  font-size: 35px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  text-decoration: none;
  transition: opacity 0.3s;
  z-index: 999;
  padding: 20px;
  opacity: 0; 
}

.scroll-top:hover {
  color: #28b4ff;
}

.scroll-top.show {
  opacity: 1;
}