div#marblescanvascontainer {
    position: absolute;
    top:0;
    bottom:0;
    left:0;
    right:0;
}
canvas#marblescanvas {
    position: absolute;
    background-color: #000000;
}
div#marblescanvasoverlay {
    position: absolute;
    background-color: #FF0000;
    display: none;
    opacity: 0.2;
    border-style: solid;
    border-left-width: 0.2em;
    border-top-width: 0;
    border-bottom-width: 0;
    border-right-width: 0;
    border-color: #AA0000;
    touch-action: none;
    pointer-events: none;
}
#marbles_game_over,
#marbles_victory {
    position: absolute;
    top: 30%;
    min-width: 20em; 
    min-height: 6em;
    bottom: auto;
    left: 30%;
    right: auto;
}
#marbles_game_over .ctab-page,
#marbles_victory .ctab-page {
    min-height: 6em;
    width: auto;
    overflow: hidden;
}
#marbles_game_over .ctab-page .content,
#marbles_victory .ctab-page .content {
    min-height: 4.75em;
}
.marble_bottom_buttons {
    position: absolute;
    width: 100%;
    bottom: 0.5em;
    top: auto;
}