.bigbutton
{
  display: inline-block;
  padding: 5px;
  margin: 5px;
  border-radius: var(--rad, 10px);
  width: 500px;
  font-size: 1.3em;
  text-decoration: none;
  color: #fff;
}
.yes {background-color: #0a0;}
.no  {background-color: #a00;}
.yes:hover {background-color: #0c0;}
.no:hover  {background-color: #f00;}