style.css

@import url('https://fonts.googleapis.com/css?family=Share+Tech+Mono');

html, body {
    display: flex;
    background: #222;
    height: 100%;
    width: 100%;
    justify-content: center;
    align-items: center;
    margin: 0;
}

#container {
    display: flex;
    width: 100%;
    height: 33%;
    min-height: 240px;
    justify-content: center;
    align-items: center;
    margin: 0 auto;
    background-image: url('public/light-wool.png')
}

#contents {
    width: 395px;
    font-family: 'Share Tech Mono', monospace;
    font-size: 300%;
    color: #ddd;
    background-color: #222;
    text-align: center;
    vertical-align: -webkit-baseline-middle;
    border-radius: 8px;
}

#name {
    font-size: 50%;
    padding: 16px 12px;
    border-bottom: 1px solid #ddd;
}

#rgb {
    padding: 8px;
}
#r {
    display: inline;
    color: #e22;
}

#g {
    display: inline;
    color: #2e2;
}

#b {
    display: inline;
    color: #33f;
}

@media screen and (orientation: portrait) {
    #container {
        height: 25%;
    }
    #contents {
        width: 80%;
        font-size: 600%;
    }

    #name {
        font-size: 50%;
    }
}