Append Burger with JS and CSS - Javascript

.rghtblck ul li:nth-child(4) h4 {
    display: none;
}

.rghtblck ul li:nth-child(1),
.rghtblck ul li:nth-child(2),
.rghtblck ul li:nth-child(3) {
    opacity: 0;
}

#burger {
    width: 100px;
    height: 50px;
    display: flex;
    border: 1px solid #f85319;
    justify-content: center;
    flex-direction: row;
    align-items: center;
    color: #f85319;
    font-weight: bold;
  	margin: auto;
    margin-bottom: 5px;
    padding-left: 9px;
  	cursor: pointer;
}

#burger div {
    flex-basis: 50%;
    display: flex;
    justify-content: center;
    height: 100%;
    align-items: center;
}

#burger .wrapper {
    flex-basis: 50%;
    height: 100%;
    justify-content: center;
    align-items: center;
    display: flex;
    flex-direction: column;
}

#burger span {
    height: 2px;
    background: #f85319;
    display: block;
    margin: 2px 0;
    width: 55%;
}

@media(max-width: 991px) {
.rghtblck ul li:nth-child(1), .rghtblck ul li:nth-child(2), .rghtblck ul li:nth-child(3) {
  	display: none;
  }
}

@media(max-width: 641px) {
  .rghtblck {
  	margin-top: unset!important;
  }
  .rghtblck ul li {
  	margin-right: 0!important;
  }
  .logo_container {
        margin-top: 0!important;
  }
  .et_header_style_centered #logo {
    margin-bottom: 10px;
  }
}