/*body {
    /* absorbed-zodiac.jpeg
     * acid-rain.jpeg
     * amphibian-tension.jpeg
     * back-102.jpeg
     * bg-pine.gif
     * bkfish3.gif
     *
    background-image: url(image/background/acid-rain.jpeg);
}
*/

#background {
   position: fixed; 
   top: 0;
   bottom: 0;
   left: 0;
   right: 0;
   z-index: -1;
}

#nav > ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
    overflow: hidden;
    text-align: center;
}

#nav > ul > li {
    display: inline-block;
    padding: 20px 20px 0px 20px;
}

#content {
    background: white;
    padding: 20px 50px;
    height: 100%;
    margin: auto;
    width: min(500px, 100%);    
}