.genius-box {
    display: inline-block;
    height: clamp(2em,2vw,4em); /*ヘッダーの立幅はここ*/
    width: clamp(12em,2vw,18em);
    vertical-align: top;
}

#top-header {
    background: url(../photo/GENIUS.png) no-repeat;
    background-position: center center;
    background-size: cover;
}


.nav-link :hover {
    color: #ff6a00;
    font-size: 20px;
}

.genius {
    color: #DBDBDB;
    font-size: 20px;
    text-align: center;
}
    .genius :hover {
        color: #ffffff;
        font-size: 20px;
    }

header {
    background-color: #E5EDF8;
    position: relative; /*fixedの場合もありますね*/
    box-shadow: 0 3px 6px rgba(0,0,0,0.15);
    color: #FFF;
    font-family: 'Rajdhani', sans-serif;
}



.fontcoller_header {
    width: 100%;
    color: #0384BD;
    font-size: 20px;
    text-align: center;
    position: relative;
    margin-right: 20px;
}
    .fontcoller_header :hover {
        color: #26282B;
        font-size: 20px;
        position: relative;
        height: 30px;
        top: 50%;
        left: 50%;
        -webkit-transform: translate(-50%,-50%);
        transform: translate(-50%,-50%);
    }