.show-child, #close-menu-mobile{
  display: none;
}

.nav-child{
    background: #fff;
    width: 313px;
    padding: 10px;
    opacity: 0;
    visibility: hidden;
    position: absolute;
    z-index: 2;
    left: 0;
    top: calc(100% + 20px);
    box-shadow: 0 2px 8px rgb(127 122 122 / 77%);
    transition-duration: 200ms;
    transition-property: opacity , top , visible;
    transition-timing-function: cubic-bezier(.7,1,.7,1);
    height: auto !important;
}