html {
	color:white;
	background-color:black;}
body {
	width:600px;
	margin:auto;
	padding:20px;
	color:black;
	background-color:white;}
a:link,a:visited {color:blue;text-decoration:none;}
a:hover,a:active {color:black;background-color:silver;text-decoration:underline;}
p,li {margin:0.5em 0;}
button {
	color:aqua;
	letter-spacing:4px;
	font:18pt 'Times New Roman',serif;
	width:330px;
	margin-top:20px;
	background-color:transparent;
	border-radius:8px;
	border-width:6px;
	border-color:yellow aqua}
button:hover {
	color:black;
	background-color:white;
	border-color:aqua;}