body {
    min-width: 600px;
    min-height: 100%;
    color: black;
    background-color: white;
    font-family: tahoma, arial, sans-serif;
    font-size: 1.1em;
}
@media (orientation: landscape) {
    body { background: url('../CogentDigitalBackground.jpg') no-repeat center center fixed;
        -webkit-background-size: cover;
        -moz-background-size: cover;
        -o-background-size: cover;
        background-size: cover;
    }
}
button {
    font-size: 1.25em;
    font-weight: bold; 
    border: 2px solid black;
    transition-duration: 0.5s;
}
button:hover {
    background-color: black; 
    color: white;
}