html, body, div, span, iframe, h1, h2, h3, h4, h5, h6, p, address, em, img, small, strong, dl, dt, dd, ol, ul, li, form, label, table, caption, tr, th, td, article, aside, footer, header, nav, section, audio, video {
 margin: 0;
 padding: 0;
 border: 0;
 outline: 0;
 font-size: 100%;
 vertical-align: baseline;
 background: transparent;
}
body {
 line-height: 1;
}
article, aside, footer, header, nav, section, main {
 display: block;
}
nav ul {
 list-style: none;
}
table {
 border-collapse: collapse;
 border-spacing: 0;
}
input, select {
 vertical-align: middle;
}