bootstrap dropdown-menu for mobile.css

@media (max-width:767px) {

  // Mobile
  .dropdown-menu {
    position: static;
  }

  .dropdown-menu li {
  }

  .dropdown-menu .dropdown-header {
    margin-top: 8px;
  }

  .dropdown-menu li a {
    line-height: 44px;
  }

  .open > .dropdown-menu {
    display: block;
    position: fixed;
    top: 5vh;
    left: 6vw;
    width: 88vw;
    max-height: 80vh;
    overflow-y: scroll;
    -webkit-overflow-scrolling: touch;
  }

  .open::after {
    content: " ";
    display: block;
    position: fixed;
    z-index: 900;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    background: rgba(255, 255, 255, .6);
    -webkit-backdrop-filter: brightness(1.5) blur(4px);
  }

}