style.css

@-moz-document url-prefix("http://stackoverflow.com"), url-prefix("https://stackoverflow.com") {

    /**
     * General.
     */

    /* font settings */
    body {
        font-family : Arial, "Liberation Sans", "DejaVu Sans", sans-serif !important;
    }

    /* Tags. */
    .post-tag {
        border-bottom-color : rgb(179, 206, 225) !important;
        border-right-color  : rgb(179, 206, 225) !important;
    }

    /* Buttons. */
    input[type=submit], input[type=button], .button, a.button:link, a.button:visited, .btn {
        background-color : #444444 !important;
        border-color     : #222222 !important;
    }

    /**
     * Question list.
     */

    /* Title links. */
    h3 > a, .result-link a {
        font-family : 'Trebuchet MS', 'Liberation Sans', 'DejaVu Sans', sans-serif !important;
        font-size   : 17px !important;
        font-weight : bold !important;
    }

    /* Votes, answers, views. */
    div.cp {
        font-family : Arial, 'Liberation Sans', 'DejaVu Sans', sans-serif !important;
    }

    .votes, .status, .views {
        font-size   : 13px !important;
        font-weight : normal !important;
    }

    div.cp > .status {
        width : 48px !important;
    }

    div.cp .mini-counts {
        font-size   : 20px !important;
        font-weight : normal !important;
    }

    /**
     * Question page.
     */

    /* Share, edit, close, flag link separator. */
    .lsep {
        color      : #cccccc !important;
        font-size  : 110% !important;
        visibility : visible !important;
    }

    /* Question header. Duh. */
    #question-header {
        padding : 0 !important;
    }

    #question-header h1 {
        margin-bottom : 7px !important;
    }

    /* Code. */
    code {
        font-size : 14px !important;
    }

    h1 code, h2 code, h3 code {
        font-size : 0.9em !important;
    }

    .comment-copy code {
        font-size : inherit !important;
    }
}