.buttons-top{
  position: fixed;
  bottom: 10px;
  right: 20px;
  z-index: 99;
  background-color: #434343; /* Green */
  color: white; 
  border: none;
  padding: 4px 12px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 22px;
  margin: 4px 2px;
  transition-duration: 0.4s;
  cursor: pointer;
  border-radius: 6px;
}

.buttons1 {
  background-color: white; 
  color: black; 
  border: 2px solid #434343;
}

.buttons1:hover {
  background-color: #434343;
  color: white;
}

.buttons2 {
  background-color: #808080; 
  color: white; 
  border: 2px solid #808080;
}

.buttons2:hover {
  background-color: white;
  color: black;
}

.buttons3 {
  background-color: white; 
  color: #808080; 
  border: 2px solid #808080;
}

.buttons3:hover {
  background-color: #808080;
  color: white;
}