body {
  font-family: sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
  min-width: 100vw;
  margin: 0;
}

.container {
  display: flex;
  justify-content: center;
  height: 90vh;
  width: 90vh;
  /* why don't the squares expand? */
}

.container div {
  display: flex;
  flex-direction: column;
  /* border: 2px solid green; */
  /* margin: 5px; */
  /* width: 20px; */
  /* height: 20px; */
  flex: 1 1 auto;
}

.container div div {
  border: 1px solid red;
  flex: 1 1 auto;
  /* width: 20px; */
  /* height: 20px; */
  /* background-color: black; */
}

button,
.changeColor {
  margin: 20px;
  background-color: bisque;
  width: 140px;
  height: 40px;
  font-size: 18px;
}

.changeColor {
  text-align: center;
  border: 2px solid black;
}

.menu {
  display: flex;
}