h2 {
  font-size: 1em;
}

#gameboard {
  --cell-width: 2em;
  --border-style: solid 2px black;
  padding-bottom: 0.75em;
  font-size: 0.5em;

  .row {
    display: flex;
    justify-content: center;
    font-size: 2em;

    .cell {
      width: var(--cell-width);
      height: var(--cell-width);
      border: var(--border-style);
      margin: 0.025em;
      font-size: 1em;

      .letter {
        font-size: 1.75em;
      }
    }
  }
}