html {
    font-family: arial, sans-serif;
    font-size: 16px;
    color: #555;
    padding: 0 20px 20px 20px;
    margin: 0;
    line-height: 1.5em;
}

.sitename {
    color: #39f;
}

.product-description {
    font-weight: bold;
}

@media (min-width: 960px) {
    body {
        width: 960px;
        margin: 0 auto;
    }
}

@media (max-width: 640px) {
    h1 {
        text-align: center;
    }
}