*{
	padding: 0;
	margin: 0;
	box-sizing: border-box;
	font-family: monospace;
	font-weight: bold;
	font-size: 30px;
}

body{
	width: 100vw;
	height: 100vh;
	background: #222;
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
}

.juego{
	max-height: 100vh;
	display: flex;
	flex-direction: column;
	justify-content: center;
}

.juego .celdas-contain{
	width: 430px;
	height: 430px;
	display: grid;
	grid-template-columns: repeat(2,200px);
	grid-gap: 10px;
	background: #555;
	padding: 10px;

}

.celda{
	background: #777;
	width: 200px;
	height: 200px;
	border-radius: 22px;
	cursor: pointer;
}

div#c1.active{
	background: #f00;
}

div#c2.active{
	background: #0f0;
}

div#c3.active{
	background: #ff0;
}

div#c4.active{
	background: #00f;
}

.button{
	border: none;
	outline: none;
	background: #555;
	color: #777;
	padding: 10px;
	border-radius: 0 0 22px 22px;
	border-top: 1px solid #777;
	cursor: pointer;
}

.button:hover{
	color: #fff;
}

.nivel{
	color: #fff;
	background: #555;
	border-radius: 22px 22px 0 0;
	border-bottom: 1px solid #777;
	display: flex;
	flex-direction: column;
	justify-content: center;align-items: center;
	padding: 10px;
}

.nivel p:first-child{
	color: #777;
	font-size: 21px;
}

.ui-screen{
	color: #fff;
	font-size: 35px;
	position: absolute;
	align-self: center;
	text-align: center;
}