.btn-group-pl button {
  background-color: #767676;
  border: 1px solid #767676;
  color: white;
  font-size: 1.3rem;
  padding: 8px 18px; 
  cursor: pointer;
  float: left;
  width:10%;
  height: 50px;
  
}

/* Clear floats (clearfix hack) */
.btn-group-pl:after {
  content: "";
  clear: both;
  display: table;
}

.btn-group-pl button:hover {
  background-color: #9e9e9e;
}

@media screen and (max-width: 600px) {
.btn-group-pl button {
  width:100%;
  margin: 2px;
  display: none;
}
}