yu.css

*
{
	margin:0;
	padding: 0;
	box-sizing: border-box;
}
body
{
	font-family: sans-serif;
	display:flex;
	align-items: center;
	justify-content: center;
	color:#545454;
	/*height:  600px;*/
}
.board {
  width: 100vw;
  
  display: grid;
  justify-content: center;
  align-content: center;
  justify-items: center;
  align-items: center;
  grid-template-columns: repeat(3, auto)
  }
.game
{
	display: grid;
	background-color: #0D8192;
	grid-template-columns: repeat(3,auto);
    grid-gap: 15px;
    margin-top: 50px;
    /*grid-template-rows: repeat(3,1fr);*/
}
.game-cell
{
	cursor: pointer;
	background-color:#14BDAC;
	height: 100px;
	text-align: center;
	width:100px;
}
.x,.o
{
	cursor:default;
}
.x::after
{
	content:'x';
	color:yellow;
	font-size: 100px;
}
.o::after
{
	content: 'o';
	color:white;
	font-size: 100px;
}
.status span
{
	color:white;
}
.status-action
{
	margin-top: 25px;
	display: flex;
	justify-content:space-around;
}
.won::after
{
	color:red;
}
.reset
{
	cursor: pointer;
}
.reset:hover
{
	color:red;
}
.title
{
	text-align: center;
	
}
.title span
{
	color:white;
}
.container
{
	background-color: #14BDAC;
	margin: 50px;
	padding: 50px;
	border-radius: 30px;
}
.status
{
	color: white;
  font-size: 2rem;
}
.winning-message {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, .9);
  justify-content: center;
  align-items: center;
  color: white;
  font-size: 5rem;
  flex-direction: column;
}

.winning-message button {
  font-size: 3rem;
  background-color: white;
  border: 1px solid black;
  padding: .25em .5em;
  cursor: pointer;
}

.winning-message button:hover {
  background-color: black;
  color: white;
  border-color: white;
}

.winning-message.show {
  display: flex;
}
@media (max-width:900px)
{
.game
{
	margin-top:25px;
	grid-gap: 10px;
}
.game-cell
{
	height: 150px;
	width:150px;
}
.x::after
{
	font-size: 150px;
}
.o::after
{
	font-size: 175px;
}
}