A CSS reset with sane defaults

reset.css

/*Box sizing (the nuclear option) */
*, *:before, *:after {
    -ms-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    -moz-box-sizing:border-box;
    box-sizing: border-box;
}

/* Fix font rendering defaults */
html, button {
    -ms-text-size-adjust: 100%;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-size: 100%;
}

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center, input,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, embed,
figure, figcaption, footer, header, hgroup,
menu, nav, output, section, summary,
time, mark, audio, video {
    margin: 0;
    padding: 0;
}

/* IE fixes for HTML5 elements */
article, aside, details, figcaption, figure, footer, header, hgroup, main, menu, nav, section, summary {
    display: block;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

caption, th, td {
  text-align: left;
  font-weight: normal;
  vertical-align: middle;
}

strong, b, mark{
    font-weight:bold;
    font-style:inherit;
}

em, i, cite, q, address, dfn, var{
    font-style:italic;
    font-weight:inherit;
}

a, u, ins{
    text-decoration:none;
}

pre, code, samp, kbd{
    font-family:monospace;
}

iframe {
  width: 100%;
}

img {
    max-width: 100%;
    height: auto;
    border: none;
}

input,
select,
textarea{
    font:inherit;
}

button {
    cursor: pointer;
}