html, body {
    width: 100%;
    height: 100%;
}

body {
    font-family: "Source Sans Pro","Helvetica Neue",Helvetica,Arial,sans-serif;
}


.header {
    display: table;
    position: relative;
    width: 100%;
    height: 100%;
    background: url(Fotolia_49860633_XL.jpg) no-repeat bottom center fixed;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    background-size: cover;
    -o-background-size: cover;
}

.jumbotron {
    padding-top: 100px;
    padding-bottom: 30px;
    margin-bottom: 30px;
    background-color:transparent;}

.impressum {
    background-color: rgba(21,80,145,0.6);
} 

.jumbotron h1 {
    margin: 0;
    padding: 0;
    font-size: 3.0em;
    font-weight: 700;
    color:white;
}

.jumbotron h3 {
    color:white;
}

.jumbotron p {
    color:white;
}


.btn-dark {
    border-radius: 0;
    color: #fff;
    background-color: rgba(21,80,145,0.6);
}

.navbar {
      font-family: "Helvetica Neue",Helvetica,Arial,sans-serif;
      color: #fff;
    background-color: rgba(21,80,145,0.6);}

.navbar-default .navbar-text {
      color: #fff;
    }

.navbar-default .navbar-link {
      color: #fff;
    }
    
@media screen and (min-width: 768px) {
  .jumbotron {
    padding-top: 300px;
    padding-bottom: 150px;
  }    
  
  .jumbotron h1 {
    font-size: 4.5em;
    font-weight: 700;
  }
}