body {
  margin: 0;
  height: 100vh;
  display: grid;
  place-items: center;
  align-items: center;
}

#title {
  text-align: center;
}

table {
  z-index: 2;
  border-spacing: 0.5rem;
}

.box {
  border: 1px solid black;
  border-radius: 10px;
  width: 100px;
  height: 100px;

  cursor: pointer;

  font-size: 50px;
  color: white;
  text-align: center;
}

.box.disabled {
  pointer-events: none;
}

#indicator {
  text-align: center;
}