div.tabuleiro {
  display: flex;
  flex-wrap: wrap;
  margin: auto;
  justify-content: flex-start;  
  width: 840px;  
}
.controle {
  display: flex;
  background-color: #f1f1f1;
  align-items: center;
}

.controle div {
  background-color: DodgerBlue;
  color: white;
  width: 120px;
  margin: 5px;
  padding: 5px;
  text-align: center;
  line-height: 30px;
  font-size: 18px;
}

#iniciar {
   background-color: #39b1a4;
   cursor: pointer;
}

#rodada, #acerto, #tempo {
	display: none;
}

#mensagem {
	display: none;
	background-color: #f1f1f1;
	color: black;
	min-width: 300px;
	text-align: left;
}

div.tabuleiro-item {
  margin: 5px;  
}