body {
    background-image: linear-gradient(#8c8c8c, #000000); 
    width: 800px; 
    margin: 0 auto;
}
header { 
    background:#01d4d9; 
    padding: 45px;
}
nav { 
    background: black;
    text-align: center; 
}
.tbstart {
    text-align: top left; 
}
nav a {
    text-decoration: none;
    font-family: serif; 
    color: black;
    text-transform: uppercase; 
    background-image: radial-gradient(#01d4d9, white); 
    padding: 8px 10px; 
    margin: 0px  2px; 
    display: inline-block
}
nav a:hover {
    background: #004346; 
    color: white; 
}
nav a.active {
    background-image: radial-gradient(#345678, white); 
}
main { 
    background: white; 
    padding: 30px; 
    overflow: auto; 
}
footer { 
    background: black;
    padding: 30px; 
    color: white
}
img { 
    width: 400px; 
    float: right; 
}
img.cs2 { 
    float: left;
}
h1 { 
    color: black; 
    font-family: monospace;
    font-size: 40px; 
    text-align: center; 
    text-shadow: 5px 5px white;
}
h1."header2" {
    font-size: 20px
}

strong { 
    color: #01d4d9; 
}
em { 
    color: #01d4d9; 
}