#brim-mask {
  display: none;
  background-color: rgba(0, 0, 0, 0.95);
}

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%;
}