* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html,
body {
    width: 100%;
    height: 100%;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 100%;
    line-height: 1.5;
}


#container {
    position: relative;
    width: 100%;
    height: 100%;
    background: #ffffff;
}

    #container #infobox {
        background-color: #efefef;
        color: #666666;
        padding: 30px 25px;
        width: 100%;
        max-width: 600px;
        min-height: 300px;
        position: absolute;
        transform: translate(-50%, -50%);
        left: 50%;
        top: 35%;
        text-align: center;
    }

#infobox a {
    margin-top: 45px;
    margin-left: 170px;
    display: block;
    font-size: 1.4em;
    border: solid 1px #999;
    padding: 10px;
    background-color: #ccc;
    width: 180px;
    color: #222;
    text-decoration: none;
}

    #infobox a i {
        float: left;
        padding-right: 4px;
        padding-left: 5px;
        color: #00c8f5;
        font-size: 1.4em;
    }

#infobox h1 {
    font-size: 2.5em;
    padding: 10px 0 20px 0;
}