.mappa_google {
  border:0;
  width: 85%; 
  height: 100%; 
  float: right; 
  margin-right: 20px;
}
@media (max-width: 991px) {
  .mappa_google {
	border:0;
	width: 100%; 
	height: 100%; 
	float: none; 
	margin-right: none;
  }
}