.jws-canvas-wrap {
    width: 100%;
    max-width: 400px;
    margin: auto;
}
.jws-canvas {
    position: relative;
    max-width: 100%;
}
.jws-box {
    border:2px dashed rgba(0,0,0,0.4);
    background:rgba(255,255,255,0.0);
    overflow:hidden;
}
.jws-box-content {
    width:100%;
    height:100%;
    position:relative;
}
.jws-form input, .jws-form button {
    width:100%;
    margin:5px 0;
}
@media screen and (max-width:768px){
    .jws-canvas-wrap { max-width: 100%; }
    .jws-box { width:80% !important; height:80% !important; }
}