body {background:skyblue; color:red; margin-left:5%;margin-right:5%;} 
pre{font-family: "times new roman",serif;} 
h1,h2,h3 {font- family: serif}
h1 {font- size:200%; margin- left:8%;}
h2 {font- size:150%; margin- left:4%;}
h3 {font- size:100%; margin- left:4%;}
p {text- indent: 2cm; margin- top:0; margin- bottom: 0;}
a: link {color: rgb: #0,#0,#153}
a: visited {color: rgb: #153,#0,#153}
a: active {color: rgb: #255,#0,#102}
a: hover {color: rgb: #0,#96,#255}
h1 {color:red;font-family:serif;padding-top:10px;padding-bottom:5px;border:thin,inset,white;text- align: center}
h2 {color:red;font-family:serif;padding-top:10px;padding-bottom:5px;border:thin,inset,white;text- align: center}
h3 {color:red;font-family:serif;padding-top:10px;padding-bottom:5px;border:thin,inset,white;text- align: center}
div.center {text-align:center}