.plus-button {
    width: 1rem;
    height: 1rem;
    position: relative;
}

.plus-button div {
    position: absolute;
    background-color: black;
    transition: top .5s, bottom .5s;
}

.plus-button div:nth-child(1) {
    left: 0;
    right: 0;
    height: 1.5px;
    transform: translateY(5px);
}

.plus-button div:nth-child(2) {
    top: 0;
    bottom: 0;
    width: 1.5px;
    transform: translateX(5px);
}

/* MENU */
.plus-button.menu-open div { 
    transition: 0;
    background-color: white !important;
}
.plus-button.menu-open div:nth-child(2) {
    top: .5rem;
    bottom: .5rem;
}