iframe wechseln mit Css

iFrame Inhalt wechseln mit CSS und ohne Javascript
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Der hier verwendete Code

<!doctype html>
<html lang="de">
<head>
<style>
*{
margin:0;
padding:0;
}
body{
height:100%;
}
main{
height:98vh;
width:100vw;
display:block;
}
iframe{
position:absolute;
right:0;
border:none;
top:0;
width:calc(100% - 100px);
height:100%;
}
label{
width:100px;
height:25%;border:1px solid black;
display:block;
position:relative;
left:0;
}
iframe{
display:none;
}
input{
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX