#supercontainer {
    position: relative;
    box-sizing: border-box;
    width: 379px;
    background: transparent linear-gradient(180deg,#ffffff00 0%,#ffffff 100%) 0% 0% no-repeat padding-box;
    height: 100%;
}
#shadow {
  position: absolute;
    bottom: 0;
    left: 0;
    background: transparent linear-gradient(180deg,#ffffff00 0%,#ffffff 100%) 0% 0% no-repeat padding-box;
    width: 100%;
    height: 150px;
}