*{
  margin: 0; 
  padding: 0; 
}
body{
	background-color: rgb(51, 102, 153);
	color: white;
}
h1{
	margin: 0 auto;
	margin-top: 20px;
	text-align: center;
	font-size: 50px;
	
}
.main{
  background-color: white;
  padding: 0px;
  padding-bottom: 30px;
  margin: 120px 150px; 
  margin-top: 50px;
  color: black;
}

#board { 
  padding: 0px;
  padding-top: 30px;  
  margin: 0 auto; 
  margin-top: 50px; 
  color: black;
}

#board tr td { 
  width: 150px; 
  height: 150px; 
  border: 1px solid #1c1c1c; 
  font-family: Arial; 
  font-size: 70px; 
  text-align: center; 
  color: black;
}
 
#board tr td:hover { 
  background: #c5d7ed; 
  cursor: pointer; 
  color: black;
}