.container 
{
	position: absolute; 
	top: 30%; 
	left: 50%; 
	transform: translate(-50%, -50%);
}

input[type=text] 
{
	padding: 10px;
	margin-right: 10px;
	border: 1px solid #ccc;
	border-radius: 4px;
	box-sizing: border-box;
	width: 100px;
	text-align: center;
}

button 
{
	padding: 10px 20px;
	background-color: black;
	color: white;
	border: none;
	border-radius: 4px;
	cursor: pointer;
}