.offcanvas-collapse {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  height: 100vh;
  padding: 0;
  overflow-y: auto;
  visibility: hidden;
  background-color: rgba(0, 0, 0, .5);
  transition-timing-function: ease-in-out;
  transition-duration: .3s;
  transition-property: all;
  z-index: 1050;
}

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

@media (min-width: 576px) {
  .offcanvas-collapse {
    max-width: 375px;
    max-height: 667px;
    margin: 0 auto;
  }
}