.m-100{margin-top:100px}.jumbotron-extend{position:relative;height:50vh;min-height:300px;background:url(../img/contact/1.jpg) no-repeat center top;background-color:rgba(255,255,255,0.5);background-blend-mode:lighten;background-size:cover}.jumbotron-container{position:relative;top:50%;transform:translateY(-50%)}