.ev-viewport { display: none; }
@media (max-width:  575px) { .ev-viewport-xs { display: block; } }
@media (min-width:  576px) { .ev-viewport-sm { display: block; } }
@media (min-width:  992px) { .ev-viewport-md { display: block; } }
@media (min-width: 1200px) { .ev-viewport-lg { display: block; } }
@media (min-width: 1500px) { .ev-viewport-xl { display: block; } }
@media (min-width: 1800px) { .ev-viewport-xx { display: block; } }
body {
  margin: 0px;
  padding: 0px;
}