style.css

body {
    margin: 0;
    padding: 0;
    background-color: black;
}

#main {
    /* Canvas is inline by default, causing a height offset due to
     * vertical-align: baseline; */
    display: block;

    margin: 0;
    padding: 0;
}

#footer {
    position: absolute;
    bottom: 0;
    width: 500px;
    margin-left: -250px;
    left: 50%;
    text-align: center;
    padding: 15px;
}

a {
    color: #E61D5F;
    font-weight: bold;
}

.glow {
    color: #ffffff;
    font-family: Courier, "Courier New", monospace;
    font-size: 12px;
    padding: 7px;
    opacity: 0.4;
    background-color: rgba(25, 25, 25, 0);
    border-radius: 5px;

    -webkit-transition: all 0.5s linear;
    -moz-transition: all 0.5s linear;
    -o-transition: all 0.5s linear;
    transition: all 0.5s linear;
    transition-property: opacity, background-color;
}

.glow:hover {
    opacity: 1;
    background-color: rgba(25, 25, 25, 1);
}