.door {
    position: absolute;
    top: 0;
    /* background: #1f2937; dark gray */
    z-index: 50;
    transition: transform 5s ease-in-out;
}

.left-door {
    left: 0;
    transform: translateX(0);
}

.right-door {
    right: 0;
    transform: translateX(0);
}

/* When animated */
.open-left {
    transform: translateX(-100%);
}

.open-right {
    transform: translateX(100%);
}