body {
    margin: 0px 0px 0px 0px;
    background-color: #ffffcc;
    font-family: "Yu Gothic", Osaka, meiryo, "ms pgothic", arial, san-serif;
}
h1 {
    color: green;
}
#menu {
    margin: 32px 0px 16px 0px;
}
#menu > ul.nav.nav-tabs > li.nav-item > a.nav-link.active {
    background: linear-gradient(#FFFF99, #FFFBCD);
}