.wpcf7-form-control-signature-wrap{
position:relative;
}
.wpcf7-form-control-signature-body{
position: absolute;
left: 0;
right: 0;
top: 0;
bottom: 0;
}
.wpcf7-form-control-signature-body canvas{
position: absolute;
left: 0;
top: 0;
width:100%;
height:100%;
}