.nav {
    position: fixed;
    top: 0;
    left: 0;
    display: flex;
    flex-flow: column;
    justify-content: space-between;
    width: var(--nav-width);
    height: 100%;
    padding: 5rem 0;
    background-color: var(--navi-container-color);
    outline: 1px solid white;
    overflow-y: scroll;
    /*スクロールバー非表示（IE・Edge）*/
    -ms-overflow-style: none;
    /*スクロールバー非表示（Firefox）*/
    scrollbar-width: none;
    transition: .4s;
    z-index: 101;
}
.nav .nav__container {
    display: flex;
    flex-flow: column;
    margin-bottom: 7rem;
}
.nav .nav__link {
    display: flex;
    align-items: center;
    line-height: 1;
    padding: 0.5rem 1rem;
    margin: 1rem 0;
    font-size: 2rem;
    transition: .1s;
}
.nav .nav__link * {
    color: #ffffff;
}
.nav .nav__link.active {
    background-color: #ffffff;
}
.nav .nav__link.active * {
    color: var(--navi-container-color);
}
.nav .nav__link .nav__icon {
    padding: 0.2rem;
    font-size: 2.5rem;
}
.nav .nav__link .nav__name {
    display: none;
    line-height: 2rem;
    white-space: nowrap;
    overflow: hidden;
    font-size: 1.3rem;
}
.nav:hover {
    width: var(--nav-width-expand);
}
.nav:hover .nav__link:hover {
    background-color: #ffffff;
}
.nav:hover .nav__link:hover * {
    color: var(--navi-container-color);
}
.nav:hover .nav__link .nav__name {
    display: initial;
}