div, p, a, span, em, strong, img, h1, h2, h3, h4, h5, h6, ul, ol, li, dl, dt, dd, table, td, tr, form, fieldset, label, select, checkbox, input, textarea, header, section, aside, article {
    padding: 0;
    margin: 0;
    outline: none;
    list-style: none;
    box-sizing: border-box;
}