html {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Segoe UI","Noto Sans Japanese","ヒラギノ角ゴ ProN W3", Meiryo, sans-serif;
    color: #3f3d55;
}
body {
    min-height: 100%;
    background-color: #f2f2f2;
    line-height: 1.4;
}
.header, .container, .footer {
    display: flex;
    display: -webkit-flex;
    justify-content: center;
}
.header img {
    padding-left: 20px;
}
.header > div, .footer > div {
    width: 100%;
    max-width: 960px;
}
.header {
    height: 60px;
    align-items: center;
    background-color: #fff;
    box-shadow: 3px 3px 6px rgba(0,0,0,.1);
    padding: 5px;
}
.container {
    min-height: calc(100vh - 110px);
    flex-wrap: wrap;
}
h2 {
    font-size: .9em;
    color: #666;
    margin-bottom: 1.5em;
}
a.btn {
    display: block;
    text-decoration: none;
    width: 160px;
    line-height: 40px;
    background-color: #5F4B8B;
    text-align: center;
    color: #fff;
}
a.btn:hover {
    box-shadow: 1px 1px 6px rgba(0,0,0,.3);
}
.version {
    font-size: .8em;
}
.container div {
    margin: 10px 20px;
}
.col2 img {
    margin-top: 20px;
}
h4 {
    margin-top: 30px;
    border-top: 1px solid #e1e1e1;
    padding-top: 20px;
}
.footer {
    margin-top: 10px;
    height: 30px;
    font-size: 11px;
    color: #333;
    font-weight: bold;
    text-align: center;
}