.nav-wrapper {
    background: #fff;
    position: fixed;
    z-index: 9;
    top: calc(100vh - 40px);
    left: calc(50vw - 60px);
}
.nav {
    display: flex;
    flex-direction: row;
}
.nav__btn {
    display: block;
    background: transparent;
    border: 1px solid var(--color-grey);
    padding: 8px;
    width: 40px;
    height: 40px;
    transition: background-color 400ms;
}
.nav__btn:not(.nav__btn__dis):hover {
    background-color: #f1f1f1;
}
.nav__btn:not(:last-child) {
    border-right: 0;
}
.nav__btn i {
    font-size: 24px;
    color: var(--color-grey);
    text-align: center;
    width: 24px;
    height: 24px;
    transition: color 400ms;
}

.nav__btn__dis i {
   color: #DDD;
}