html, body {
    height: 100%;
}

html {
    display: table;
    margin: auto;
}

body {
    display: table-cell;
    vertical-align: middle;
    text-align: center;
    font-family: Helvetica;
}

div {
    padding-bottom: 10px;
}

h1 {
    font-family: Helvetica;
    font-size: 5em;
}

h2 {
    font-family: Helvetica;
    font-size: 3em;
}