[class*="col-"] {
   width: 100%;
 }
  @media only screen and (min-width: 768px) {
  [class*="col-"]  {
    float: left;
    padding: 10px;
  }
  .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%;}
  .col-10 {width: 83.33%;}
  .col-11 {width: 91.66%;}
  .col-12 {width: 100%;}
}
.header {
  height: auto;
  background-color: olive;
  padding: 10px;
}
#muziekschool {
  font-family: Arial, sans-serif;
  font-size: 25px;
  color: white;
  text-align: center;
}
#koptekst {
  font-family: Arial, sans-serif;
  font-size: 12px;
  color: white;
  text-align: center;
}
#navigatie {
  height: auto;
  background-color: green;
}
ul a {
color: white;
text-decoration: none;
}
li {
  display: inline-block;
  height: auto;
  width: 100px;
  padding: 10px;
  text-align: left;
  color: white;
}
li:hover {
  background-color: darkolivegreen;
  border-style: none;
}
.linkervak {
  padding: 5px;
  color: black;
  background-color: yellowgreen;
}
.rechtervak {
  padding: 5px;
  color: black;
}
#saxo {
  height: 80%;
  width: 100%;
}
#trompet {
  height: auto%;
  width: 50%;
}
#saxo2 {
  height: 80%;
  width: 50%;
}
#kind {
  height: auto;
  width: 100%;
}
#middentekst {
  color: olive;
}
#hanjes {
  color: olive;
}
#fotohannah {
  float: right;
  height: 60%;
  width: 25%;
  margin-right: 5px;
  padding: 5px;
}
#fotojesse {
  float: left;
  height: 45%;
  width: 25%;
  margin-right: 5px;
  padding: 5px;
}
textarea {
  height: 100px;
  padding: 5px;
}
iframe {
  height: auto;
  width:  95%;
}
.footer {
  height: auto;
  padding: 10px;
  color: white;
  background-color: olive;
  text-align: center;
}