instapaper.css

.ad_box, .ad_box + .hr {
    display: none;
}

.article_preview,body #story {
    color: rgba(0,0,0,0.8);
    font-family: "FreightText";
    letter-spacing: 0.01rem;
    line-height: 1.5;
}

.title_meta {
    opacity: .4;
}

body {
    -moz-osx-font-smoothing: grayscale;
    -webkit-font-smoothing: antialiased;
    font-style: normal;
    font-weight: 400;
    letter-spacing: 0.01rem;
    text-rendering: optimizeLegibility;
}

body #story {
    font-size: 22px;
}

body #titlebar h1 {
    color: rgba(0,0,0,0.9);
    font-size: 36px;
    letter-spacing: -0.05rem;
}

body #titlebar h1, a.article_title {
    color: rgba(0,0,0,0.8);
    font-family: "Proxima Nova";
    font-weight: 700;
    letter-spacing: -0.01rem;
}