body {
background-color: navy;
color: white;
}

h1 {
margin: 15px;
}

@media (max-width: 480px) {

body {
    font-size: 8px;
	color: white;
	background-color: aqua;
}

.plaatje.vak {
display:inline-block;
clear: both;
margin-bottom: -90px;
width: 160px;
margin-left: 10px;
height: 100px;

}

.header.had{
		
background-image: url("../plaatjes/huis.jpg");
}
}


[class*="col-"] {
float: left;

}
.col-1 {width: 8.33%;}
.col-2 {width: 16.66%;}
.col-3 {width: 25%;}
.col-4 {width: 33.33%;}
.col-5 {width: 41.66%;}
.col-6 {width: 50%;}
.col-7 {width: 58.33%;}
.col-8 {width: 66.66%;}
.col-9 {width: 75%; min-height: 90vh; background-color: blue;}
.col-10 {width: 83.33%;}
.col-11 {width: 91.66%;}
.col-12 {width: 100%;}

.had {
background-image: url("../plaatjes/huis.jpg");
color: white;
padding: 15px;
font-family: "Helvetica", Times, serif;
}

.vak{
display:inline-block;
clear: both;
margin-bottom: -174px;
margin-left: 10px;
width: 260px;
height: 190px;

}


.menu ul {
list-style-type: none;
margin: 0;
padding: 0;
margin-top: 7px;
}
.menu li {
padding: 8px;
margin-bottom: 7px;
background-color: teal;
color: white;
}



.parent {
  border: 1px solid black;

}
.child {
  display: inline-block;
  padding: 1em;
}



.footer {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
  background-color: black;
  color: white;
  text-align: center;
}