body {color:brown; background-color:yellow}
h2, h4 {font-family:Arial, Helvetica, sans-serif; text-align:center}
div.operas {color:black; border:2px red solid; margin:5px; padding:5px; float:right; font-size:10pt; background-color:lightblue}
a {text-decoration:none}
a:link {color:gray}
a:visited {color:gray}
a:active (color:gray}
a:hover {color:green; text-transform:uppercase}