body {
	width: 500px;
	margin: auto;
}
input:focus {
	border: 2px solid red;
}
input:invalid {
	background-color: red;
}
input {
	border: 2px solid black;
}
label {
	float: left;
	text-align: right;
	margin-right: 15px;
	width: 150px;
}