   clear: both;
                margin-top: 25px;
                border-top: 1px solid #ebebeb;
                text-align: center;
            }
            footer p, footer a {
                color: #999
            }

            @media all and (max-width:800px) {
                header, article, footer {
                    width: 98%;
                }

                #book {
                    width: 300px;
                }
            }
            @media all and (max-width:720px) {
            