h1 { 
       	background-color: white;
       	color: black;
	font-family: Arial;
  	font-size: 20px;
    }
    h2 { 
    	color: black;
	font-family: Arial;
  	font-size: 16px;
    }
    h3 {
    	text-align: center; 
    	color: black;
	font-family: Arial;
  	font-size: 13px;
    }

    p { 
    	color: black;
	font-family: Arial;
  	font-size: 14px;
    }

.header {
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  background-color: white;
  color: black;
  text-align: center;
}

.footer {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
  background-color: white;
  color: black;
  text-align: center;
}
.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 45%;