html, body, div, span, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, abbr, address, cite,
code, del, dfn, em, img, ins, kbd, q, samp, small, strong, sub, sup, var, b, i, dl, dt, dd, ol, ul, li,
fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, canvas, details,
figcaption, figure, footer, header, hgroup, menu, nav, section, summary, time, mark, audio, video, address {
    margin:0;
    padding:0;
    border:0;
    outline:0;
    font-size:100%;
    vertical-align:baseline;
    background:transparent;
    font-family: Arial, Geneva, Helvetica, sans-serif;
    box-sizing: border-box; /* width включает padding и border но не margin */
    -moz-box-sizing: border-box; /* Для Firefox */
    -webkit-box-sizing: border-box; /* Для Safari и Chrome */
}

article, aside, details, figcaption, figure,
footer, header, hgroup, menu, nav, section {
    display:block;
    z-index: 13;
}