body {
  box-sizing: border-box;
  margin: 0;
}

stateful-client {
  display: inline-block;
}

#grid {
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: tan;
  border: 1px solid black;
}

mine-cell {
  width: 25px;
  height: 25px;
  border: 0.2px solid rgba(0, 0, 0, 0.1);
  box-sizing: border-box;
}

mine-cell>* {
  width: 100%;
  height: 100%;
  text-align: center;
}