#brim-mask {
    display: none;
    background-color: rgba(0, 0, 0, 0.2);
}

body.full, body.minimal {
    position: static;
}

#game-grid {
    display: flex;
    flex-direction: row;
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;
}
#game-column {
    min-width: 0;
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
    width: 100%;
    height: 100%;
}
#game-holder {
    min-width: 0;
    flex: 1 1 auto;
    position: relative;
    height: 50%;
}