@media (max-width: 991px) {
  .offcanvas-collapse {
    position: fixed;
    top: 50px;
    /* Height of navbar */
    bottom: 0;
    left: -100%;
    width: 80%;
    padding-right: 1rem;
    padding-left: 1rem;
    overflow-y: auto;
    visibility: hidden;
    background-color: rgba(255, 255, 255, 0.98);
    transition-timing-function: ease-in-out;
    transition-duration: .3s;
    transition-property: left, visibility;
  }

  .offcanvas-collapse.open {
    left: 0;
    visibility: visible;
  }
}