html { 
  background: url(../images/20190315-1920-1080.jpg) no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
  position: relative;
    min-height: 100%;
}

body {
    margin: 0 0 250px; /* bottom = footer height */
}

#wrapper {
	min-height: 100%;
	height: auto !important;
	height: 100%;
	margin-bottom: -250px; /* hoogte footer */
}

#container{
   position: absolute;
   top: 50%;
   margin-top: -200px;/* half of #content height*/
   left: 0;
   width: 100%;
}

#logo {
    width: 400px;
    margin: auto;
    padding: 20px;
}

#spacer {
	display: block !important;
	height: 250px; /* hoogte footer */
}


#footer {
	position: absolute;
    left: 0;
    bottom: 0;
    height: 100px;
    width: 100%;
	text-align: center;
}