.btn {
  border: 2px solid black;
  background-color: white;
  color: black;
  padding: 14px 28px;
  font-size: 16px;
  cursor: pointer;
}
 
/* Green */
.success {
  border-color: #4CAF50;
  color: green;
}
 
.success:hover {
  background-color: #4CAF50;
  color: white;
}
 
/* Blue */
.info {
  border-color: #2196F3;
  color: dodgerblue
}
 
.info:hover {
  background: #2196F3;
  color: white;
}
 
/* Orange */
.warning {
  border-color: #ff9800;
  color: orange;
}
 
.warning:hover {
  background: #ff9800;
  color: white;
}
 
/* Red */
.danger {
  border-color: #f44336;
  color: red
}
 
.danger:hover {
  background: #f44336;
  color: white;
}
 
/* Gray */
.default {
  border-color: #e7e7e7;
  color: black;
}
 
.default:hover {
  background: #e7e7e7;