.wrapper{
	text-align: center;
	align-items: center;
	justify-content: center;
	width: 350px; 
	padding: 20px;
    margin: 0 auto;
}

 body{ 
 	font: 14px sans-serif; 
 }

 header{
	background-image: url(../img/fondoempresa.jpg);
	height: 100vh;
	background-size: cover;
}

input{
	text-align: center;
}
 input[type="email"]:focus:invalid{
 	border:1px solid red;
 	box-shadow: 0 0 5px red;
 }