.google-calendar-box {
  height: 350px; 
  margin-left: 5%; 
  margin-right: 45%; 
  width: 50%; 
  margin-top: 12px;
}

@media screen and (min-width: 480px) {
.google-calendar-box {
  height: 100%; 
  margin-left: 0; 
  margin-right: 0; 
  width: auto; 
  margin-top: 12px;
  }
}