body {
	display: flex;
	align-items: center;
	justify-content: center;
	height: 100vh;
	margin: 0;
	background-color: #1d3557;
}

#field {
	position: relative;
	width: 600px;
	height: 400px;
	background-color: #a8dadc;
	border: 5px solid #457b9d;
	overflow: hidden;
}

.player {
	position: absolute;
	width: 50px;
	height: 50px;
	background-color: #e63946;
	border-radius: 50%;
	cursor: pointer;
}