.holder {
  position: relative;
}
.holder:after {
  left: 0;
  right: 0;
  width: 100%;
  bottom: -21px;
  content: "";
  height: 21px;
  display: block;
  position: absolute;
  /* Here's the SVG embedded into the CSS BG using https://yoksel.github.io/url-encoder/ */
  background: url("data:image/svg+xml, %3Csvg width='1166' height='21' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cmask id='mask0' mask-type='alpha' maskUnits='userSpaceOnUse' x='0' y='0' width='1166' height='21'%3E%3Crect width='1166' height='21' fill='url(%23paint0_linear)'/%3E%3C/mask%3E%3Cg mask='url(%23mask0)'%3E%3Crect width='1166' height='21' fill='url(%23paint1_radial)'/%3E%3C/g%3E%3Cdefs%3E%3ClinearGradient id='paint0_linear' x2='1' gradientUnits='userSpaceOnUse' gradientTransform='matrix(-1166 -7 2608 -438157 -138 219063)'%3E%3Cstop offset='0' stop-color='%23333' stop-opacity='0'/%3E%3Cstop offset='0.5' stop-color='%23000' stop-opacity='1'/%3E%3Cstop offset='1' stop-opacity='0'/%3E%3C/linearGradient%3E%3CradialGradient id='paint1_radial' cx='0.5' cy='0.5' r='0.5' gradientUnits='userSpaceOnUse' gradientTransform='translate(1453 -10) scale(1740 62) rotate(90)'%3E%3Cstop offset='0.0' stop-opacity='0'/%3E%3Cstop offset='0.5' stop-opacity='0'/%3E%3Cstop offset='1'/%3E%3C/radialGradient%3E%3C/defs%3E%3C/svg%3E") no-repeat;
  background-size: 100% 100%;
}