#murasakiHpTop__body__NavButton,
.murasakiHpTop__body__NavMenu {
    font-size: 1px;
}

/**********************
ボタン
***********************/

#murasakiHpTop__body__NavButton {
    position: fixed;
    z-index: 101;
    top: 62em;
    right: 40em;
    width: 40em;
    aspect-ratio: 1 / .6;
}

#murasakiHpTop__body__NavButton__div {
    position: relative;
    width: 100%;
    height: 100%;
}

#murasakiHpTop__body__NavButton__div span {
    position: absolute;
    right: 0;
    width: 100%;
    height: 10%;
    margin: auto;
    background-color: #000;
    -webkit-transition: all .6s ease;
    -o-transition: all .6s ease;
    transition: all .6s ease;
    border-radius: 20em;
}

#murasakiHpTop__body__NavButton__div span:nth-child(1) {
    top: 0%;
}

#murasakiHpTop__body__NavButton__div span:nth-child(2) {
    top: 50%;
    width: 80%;
}

#murasakiHpTop__body__NavButton__div span:nth-child(3) {
    top: 100%;
    width: 50%;
}

#murasakiHpTop__body__NavButton__div.active span:nth-child(1) {
    top: 0;
    bottom: 0;
    -webkit-transform: rotate(45deg);
        -ms-transform: rotate(45deg);
            transform: rotate(45deg);
}

#murasakiHpTop__body__NavButton__div.active span:nth-child(2) {
    opacity: 0;
}

#murasakiHpTop__body__NavButton__div.active span:nth-child(3) {
    top: 0;
    bottom: 0;
    -webkit-transform: rotate(315deg);
        -ms-transform: rotate(315deg);
            transform: rotate(315deg);
    width: 100%;
}

/**********************
メニュー
***********************/

.murasakiHpTop__body__NavMenu {
    position: fixed;
    top: 0;
    width: 100%;
    height: 100vh;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
    background: #ffffffe3;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;
    -webkit-transition: all .8s ease;
    -o-transition: all .8s ease;
    transition: all .8s ease;
    z-index: -100;
    opacity: 0;
}

.murasakiHpTop__body__NavMenu.open {
    z-index: 100;
    opacity: 1;
}

.NavMenu {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: horizontal;
    -webkit-box-direction: reverse;
        -ms-flex-direction: row-reverse;
            flex-direction: row-reverse;
    -ms-flex-pack: distribute;
        justify-content: space-around;
}

.NavMenu__li {
    padding-inline: 1rem;
}

.NavMenu__li__a {
    font-size: 24em;
    text-align: center;
    -webkit-writing-mode: vertical-rl;
        -ms-writing-mode: tb-rl;
            writing-mode: vertical-rl;
    text-orientation: upright;
    -webkit-transition: opacity .3s ease;
    -o-transition: opacity .3s ease;
    transition: opacity .3s ease;
}

.NavMenu__sns {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: justify;
        -ms-flex-pack: justify;
            justify-content: space-between;
    width: 250em;
    aspect-ratio: 1 / .15;
    margin-top: 80em;
}

.NavMenu__sns img {
    -webkit-transition: opacity .3s ease;
    -o-transition: opacity .3s ease;
    transition: opacity .3s ease;
}

.NavMenu__li__a:hover,
.NavMenu__sns img:hover {
    opacity: .5;
}

.NavMenu__sns img {
    height: 100%;
    aspect-ratio: 1/1;
}


@media screen and (max-width:980px) {
    .NavMenu {
        min-width: 40vw
    }
}

@media screen and (max-width:640px) {

    #murasakiHpTop__body__NavButton,
    .murasakiHpTop__body__NavMenu {
        font-size: .9px;
    }

    #murasakiHpTop__body__NavButton {
        width: 8%;
        top: 1.8rem;
        right: 1.6rem;
    }


    .NavMenu {
        min-width: 70vw;
    }
}