body {
    background-color: mediumslateblue;
    height: 100px; 
}
header {
    background-image:url("pixelscifi.gif");
    background-color:black;
    background-position:top;
    background-repeat:no-repeat;
    height: 200px; 
    text-align:center; 
}
nav {
    text-align: center
}
nav a { 
    text-decoration: none;
    font-family: fantasy;
    font-size:20px;
    color: black;
    text-shadow: 1px 1px 5px white;
    text-transform: uppercase; 
    background-image: linear-gradient(#4d4d4d, black); 
    padding: 8px 10px; 
    margin: 0px  2px; 
    display: inline-block;
}
nav a:hover { 
    background-image: linear-gradient(blueviolet, #290048); 
    color: black; 
} 
h1 { 
    font-size: 40px;
    color: white;
    font-family: 'Monoton', cursive;
    text-shadow: 5px 5px 10px black;
}