body {background: #000}

/* Vertical centering: make div as large as viewport and use table layout */
div.container {top: 0; left: 0; width: 100%; height: 100%; position: fixed; display: table}
p {display: table-cell; vertical-align: middle}

img.displayed {display: block; margin: 1em auto}
p {text-align: center}

a {text-decoration:none; color: #fff; font: normal 24px arial, sans-serif; cursor:pointer}
a:hover{color: #f00}