.board {
  display: flex;
  border: 1px dotted grey;
  /*width: 350px;*/
  flex-wrap: wrap;
}

.board memory-card {
  margin: 10px 10px 10px 10px;
}

.board[data-game-complete="true"] {
  background: green;
}

#board_options {
  border: 1px dotted black;
  border-radius: 5px;
  margin-bottom: 10px;
  margin-top: 10px;
  padding: 5px;
}