body {
    background-color: #000088;
    color: #FFFF55;
    font-family: "Courier New", Courier, monospace;
    margin: 0;
    padding: 0;
}

.top-bar {
    background-color: #AAAAAA;
    color: #000000;
    padding: 4px 15px;
    font-size: 14px;
    border-bottom: 2px solid #FFFFFF;
}

#wrapper {
    width: 90%;
    margin: 20px auto;
    border: 4px solid #FFFFFF;
    box-shadow: 10px 10px 0px #000000;
}

header {
    background-color: #0000FF;
    padding: 15px;
    text-align: center;
    border-bottom: 4px solid #FFFFFF;
}

h1 { margin: 0; text-decoration: underline; }

marquee {
    background: #000000;
    padding: 5px;
    color: #00FF00;
    border: 2px inset #AAAAAA;
}

.content-box {
    display: flex;
    background-color: #0000AA;
}

nav {
    width: 220px;
    padding: 20px;
    border-right: 4px solid #FFFFFF;
}

nav ul { list-style: none; padding: 0; }
nav li { margin: 10px 0; }
nav a {
    color: #FFFFFF;
    text-decoration: none;
    display: block;
    padding: 5px;
    border: 1px transparent solid;
}

nav a:hover, .active {
    color: #000000 !important;
    background-color: #FFFF55;
    border: 1px solid #000;
}

main { padding: 25px; flex-grow: 1; }

footer {
    background: #AAAAAA;
    color: #000000;
    padding: 10px;
    text-align: center;
    font-weight: bold;
}

pre {
    background: #000;
    color: #0f0;
    padding: 15px;
    border: 2px solid white;
    overflow-x: auto;
}