html {
    overflow: auto;
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: "メイリオ", "Meiryo", "ヒラギノ角ゴ Pro", "Hiragino Kaku Gothic Pro", "Noto Sans Japanese", Osaka, "ＭＳ Ｐゴシック", "MS PGothic", sans-serif;
    margin: 0;
    padding: 0;
    color: #fff;
    user-select: none;
    -webkit-user-select: none;
    -ms-user-select: none;
    -moz-user-select: none;
    -khtml-user-select: none;
    -webkit-user-drag: none;
    -khtml-user-drag: none;
    background-color: black;
    text-align: center;
    overflow-x: hidden;
    display:flex;
    flex-direction:column;
    min-height:100vh;
}
header{
    width:min(100%,1280px);
    margin:0 auto;
    background-color: #000;
    display:flex;
    justify-content: space-between;
}

header a img{
    height:calc(36px + 36*min(0.1vw,1px));
}

.logo-ls{
    
    height:calc(36px + 36*min(0.1vw,1px)); 
}
.logo-er{
    height:calc(25px + 25*min(0.1vw,1px)); 
    margin-bottom:calc(2px + 2*min(0.1vw,1px)) ;
}
header img:last-child{
    margin-left:auto;
}

.wrapper{
    width:100%;
    flex:1;
}
.wrapper-for-main{
    background-image: url(../img/bg.jpg);
    background-size: min(250%,1920px) auto;
    background-position: center top;
    background-repeat: no-repeat;
}

.btn-container{
    width:min(100%,768px);
    aspect-ratio:1.1 / 1;
    margin:0 auto;
    position:relative;
}
.mv-container{
    width:min(100%,1280px);
    margin:0 auto;
    display:flex;
    flex-wrap: wrap;
    justify-content: center;
}
.mv-container a{
    width:min(50%,15rem);
    display:block;
}
.mv-container a img{
    width:100%;
}

p {
    margin:0px;
    font-size: 0.8rem;
    line-height: 0.8rem;
    color: #fff;
}

#guidebutton{
    position:absolute;
    left:0;
    bottom:0;
    width:min(25%,128px);
    margin:5%;
    float:right;
    z-index: inherit;
}

.forty{
    width:80px;
    float:right;
    z-index: inherit;
    
}

#mvlist{
    text-align: center;
    width:100%;
    position:absolute;
    bottom:0;
}

.mv{
    width:22.5%;
}

footer{
    width:100vw;
    background-color:black;
    margin:1rem auto;
}

.footer-main{
    width:auto;
    display:inline-block;
}

.book{
    display:block;
    width:min(100%,1280px);
    margin:0 auto;
    scroll-snap-align: start;
}


/*TOPへ戻る*/
#to-top{
    display:block;
    position:fixed;
    right:-5rem;
    bottom:3rem;
    color:#666;
    background-color: #fff;
    height:2rem;
    width:4rem;
    border:0.3rem solid #666;
    border-radius:2rem;
    font-weight: bold;
    text-align: center;
    line-height: 2rem;
    cursor:pointer;
    text-decoration: none;
    opacity:0.8;
    transition-duration: 0.3s;
}
#to-top:hover{
    opacity:1;
}