h1 {
    font-size: 260%;
}
body {
    font: 20px Helvetica, sans-serif;
    color: #333;
}
div {
    text-align: left;
    width: 650px;
    margin: 10% auto 0 auto;
}
a {
    color: #dc8100;
    text-decoration: none;
}
a:hover {
    color: #333;
    text-decoration: none;
}

@media screen and (max-width: 675px) {
    div {
        width: 100%;
        margin-top: 0px;
    }
}