body > .MondrianContainer {
  height: 100vh;
  width: 100vw;
}

.MondrianContainer {
  display: flex;
  position: relative;
  overflow: hidden;
  background: ghostwhite;
}

.MondrianContainer.above {
  flex-direction: column;
}

.MondrianContainer.beside {
  flex-direction: row;
}

.MondrianPanel, .MondrianContainer {
  flex-basis: auto;
  position: relative;
  flex-grow: 1;
  flex-shrink: 1;
}

.MondrianPanel {
    box-sizing: border-box;
    min-width: 10em;
    min-height: 10em;
}