#side {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: 340px;
    z-index: 30;
    pointer-events: none
}

#side::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(0, 0, 0, .92) 0%, rgba(0, 0, 0, .7) 55%, transparent 100%);
    opacity: 0;
    transition: opacity .35s
}

#side.open::before {
    opacity: 1
}

#side nav {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 6px;
    pointer-events: auto
}

.ni {
    margin-left: 16px;
    width: 56px;
    height: 56px;
    border-radius: 28px;
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 0 16px;
    color: #fff;
    opacity: .45;
    overflow: hidden;
    white-space: nowrap;
    transition: width .32s cubic-bezier(.2, .8, .2, 1), background .25s, color .25s, opacity .25s
}

.ni svg {
    width: 24px;
    height: 24px;
    flex: 0 0 24px
}

.ni span {
    font-size: 19px;
    font-weight: 600;
    opacity: 0;
    transition: opacity .25s
}

.ni.act {
    opacity: 1
}

#side.open .ni {
    width: 260px;
    opacity: .85
}

#side.open .ni span {
    opacity: 1
}

#side.open .ni.on {
    background: #fff;
    color: #000;
    opacity: 1
}

.brand {
    position: absolute;
    left: 24px;
    top: 5vh;
    display: flex;
    align-items: center;
    gap: 14px;
    height: 44px;
    color: #fff
}

.brand svg,
.brand img {
    width: 40px;
    height: 40px;
    flex: 0 0 40px;
    object-fit: contain
}

.brand span {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -.03em;
    opacity: 0;
    transform: translateX(-6px);
    transition: opacity .3s, transform .3s
}

#side.open .brand span {
    opacity: 1;
    transform: none
}