iframe.map{
  display: block;
  width: 400px;
  border-radius: 50%;
  min-width: 400px;
  min-height: 400px;
  max-width: 400px;
  margin: auto;
  max-height: 400px;
  filter: invert(1);
  transition: all 0.7s ease;
}

iframe.map:hover{
  box-shadow: 0 0 7px 2px white;
  filter: invert(0.9);
}