slide-left-center.css

html div#om-{{id}} {

    	left: 0 !important;

	height: 540px !important;

	top: calc(540px / 2) !important;

	bottom: calc(540px / 2) !important;

	margin-top: auto !important;

	margin-bottom: auto !important;

	animation: 1s ease-out 0s 1 slideInFromLeft;

}

@keyframes slideInFromLeft {

  0% {

    transform: translateX(-100%);

  }

  100% {

    transform: translateX(0);

  }

}