.ir-arriba {
  display:none;
  padding:20px;
  background:#323232;
  font-size:50px;
  color:#024959;
  cursor:pointer;
  position:fixed;
  bottom:20px;
  border-radius:10px;
  right:20px;
  z-index:1000;
}

a:hover {
  color:#323232;
}

.topbutton {
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.5);
    font-size: 15px;
    color: #ffffff;
    padding: 10px;
    font-family: Orbitron;
    font-weight: 700;
}