main.css

body {
    font-family: 'Courier New', Courier, monospace;
    margin-left: 16px;
    background-image: url("juliabg.png");
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
    background-color: #F9F9F9;
    font-size: 19px;
    max-width: 35em;
}
  
ul {
    font-family: 'Courier New', Courier, monospace;
}

img {
    float: right;
    margin-top: 0;
    z-index: -1;
}

#footer {
    position: absolute;
    bottom: 8px;
    right: 16px;
    font-size: 12px;
}

#bg-tag {
    position: absolute;
    bottom: 0px;
    right: 6px;
    font-size: 12px;
}

.header {
    position:absolute;
    top: 6px;
    right: 6px;
}

@media only screen and (max-width: 1100px) {
    body {
        background:none;
    }
    #bg-tag {
        display: none;
    }
}