html, body, header, footer, p, a, div, h1, h2, h3, h4 ,h5, h6, nav, ul, ol, li, img, figure, figcaption, section, article, span, form, fieldset, input, button, textarea, select, option {
    border: 0;
    font-size: 100%;
    margin: 0;
    padding: 0;
    vertical-align: baseline;
}