silphius/app/react/components/ui.module.css

.devtools {
  display: none;
  height: 100%;
  &.devtoolsIsOpen {
    display: block;
    width: 50%;
  }
}

.game {
  align-self: center;
  line-height: 0;
  position: relative;
  &.devtoolsIsOpen {
    width: 50%;
  }
}

.ui {
  display: flex;
  line-height: 0;
  position: relative;
  user-select: none;
}