body{
background-image: url(images/vijver.png);
background-size: cover;
}
.container{
min-height: 100vh !important;
}
.row_100{
min-height: 100vh !important;
}
.col{
background-color: rgba(255, 255, 255, 0.9);
margin: 5px;
}
.maintile{
width: auto;
}
.btn{
border-radius: 0;
}