/* Mozilla proposal (dash) */
.target-fullscreen:full-screen {
    width:100%;
    height:100%;
}

/* W3C proposal (no dash) */
.target-fullscreen:fullscreen {
    width:100%;
    height:100%;
}

/* currently working vendor prefixes */
.target-fullscreen:-webkit-full-screen, .target-fullscreen:-moz-full-screen {
    width:100%;
    height:100%;
}