.jumbotron1 {
  height: 100%;
  background: linear-gradient(
      rgba(0, 0, 0, 0.10), 
      rgba(0, 0, 0, 0.10)
    ), url("http://www.sophiepitcherwebdesign.co.uk/jumbotron/2836-steinway-model-A-grand-piano-41793-rosewood.jpg") no-repeat center center; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
  margin: 0;
padding:48px 15px;margin-bottom:20px;
}



.jumbotron1 h1 {
color: #ffffff;
text-shadow: 3px 2px #000;
font-family: 'Open Sans', sans-serif;
padding-bottom: 20px;
margin-bottom:15px; 
font-size: 6vw;


}

.jumbotron1 .btn-main {
color: #ffffff;
background-color: #000;
font-family: 'Open Sans', sans-serif;
padding: 10px 40px 10px 40px;
text-align: center;
}