.button {
  box-shadow: 0 8px 16px 0 rgba(0,0,0,0.2), 0 6px 20px 0 rgba(0,0,0,0.19);
  border: none;
  color: white;
  padding: 16px 32px;
  text-align: center;
  font-size: 16px;
  margin: 4px 2px;
  opacity: 0.6;
  transition: 0.3s;
  display: inline-block;
  text-decoration: none;
  cursor: pointer;
}
.buttonred {
  background-color: #f44336;
  border-radius: 9px;
}
.buttonblue {
  background-color: #008CBA;
  border-radius: 9px;
}
.buttonend {
  background-color: #4CAF50;
  border-radius: 50%;
}


.button:hover {opacity: 5}