body {
    margin: 0;
}

header {
    padding: 15px;
    text-align: right;
    background-color: #FFFFFF80;
    position: absolute;
    top: 0;
    z-index: 999;
}

header a {
    margin-left: 10px;
}

.main_visual {
    width: 100vw;
    height: 100vh;
    background-image: url("../images/roppongi/roppongi_kv.png");
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    background-color: #000000;
}