body {
background: url(circuit.png);
margin-left: 10%;
margin-right: 10%;
font-family: Arial, sans-serif;
}

p, dd {
text-align: justify;
}

h1 {
background: black;
color: yellow;
border: outset 4px silver;
text-align: center;
}

div.text {
background: white;
color: black;
border: double black 3px;
padding: 20px;
margin-top: 20px;
font-size: 85%;
font-weight: bold;
}

div.nav {
background: silver;
color: black;
border: outset silver 2px;
font-weight: bold;
padding: 4px;
margin-top: 20px;
}

div.nav a:link {
color: red;
text-decoration: none;
}

div.nav a:visited {
color: maroon;
text-decoration: none;
}

table.levels {
color: yellow;
background: black;
border: silver outset 4px;
font-weight: bold;
}

table.levels a:link {
color: yellow;
}

table.levels a:visited {
color: #808000;
}