body {
  margin: 0;
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
}

#root {
  height: 100vh;
  cursor: pointer;
}

body div {
  margin: 1px;
  display: flex;
  flex-grow: 1;
  background: black;
}

div.hey {
  flex-direction: column;
  background: white;
}

div.hoo {
  background: black;
}