Formulario CF7 a 2 columnas responsive

/*
Formulario CF7 a 2 columnas responsive
*/
#responsive-form{
max-width:600px /*– change this to get your desired form width –*/;
margin:0 auto;
width:100%;
}
.form-row{
width: 100%;
}
.column-half, .column-full{
float: left;
position: relative;
padding:8px;
width:100%;
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box
}
.clearfix:after {
content: «»;
display: table;
clear: both;
}
/**—————- Media query —————-**/
@media only screen and (min-width: 48em) {
.column-half{
width: 50%;
}
}
.wpcf7-form-control.wpcf7-submit.has-spinner{
width:100%;
}