.strat_parallax{
	display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    -webkit-flex-direction: column;
    -ms-flex-direction: column;
    flex-direction: column;
    -webkit-flex-wrap: wrap;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
    -webkit-justify-content: center;
    -ms-flex-pack: center;
    justify-content: center;
    -webkit-align-content: center;
    -ms-flex-line-pack: center;
    align-content: center;
    -webkit-align-items: flex-start;
    -ms-flex-align: start;
    align-items: flex-start;
    min-height: 400px;
}