sitewide.css

.woocommerce-store-notice, p.demo_store {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    margin: 0;
    width: 100%;
    font-size: 1em;
    padding: 1em 0;
    text-align: center;
    background-color: #a46497;
    color: #fff;
    z-index: 99998;
    box-shadow: 0 1px 1em rgba(0,0,0,.2);
    display: none;
}

.admin-bar p.demo_store {
    top: 32px;
}
.woocommerce-store-notice a, p.demo_store a {
    color: #fff;
    text-decoration: underline;
}