#loader{
	position: fixed;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
}

.jumbotron{
	text-align:center;
}
.display-3{
	margin-bottom: 30px;
}

.buttonAfterClosed{
	position: fixed!important;
    left: 50%!important;
    top: 50%!important;
	transform: translate(-50%, -50%)!important;
}