doc/themes/learn2/scss/nucleus/_core.scss

*, *::before, *::after {
	@include box-sizing(border-box);
}

@-webkit-viewport{width:device-width}
@-moz-viewport{width:device-width}
@-ms-viewport{width:device-width}
@-o-viewport{width:device-width}
@viewport{width:device-width}

html {
	font-size: 100%;
	-ms-text-size-adjust: 100%;
	-webkit-text-size-adjust: 100%;
}

body {
	margin: 0;
}

article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
main,
nav,
section,
summary {
	display: block;
}

audio,
canvas,
progress,
video {
	display: inline-block;
	vertical-align: baseline;
}

audio:not([controls]) {
	display: none;
	height: 0;
}

[hidden],
template {
	display: none;
}

a {
	background: transparent;
	text-decoration: none;
}

a:active,
a:hover {
	outline: 0;
}

abbr[title] {
	border-bottom: 1px dotted;
}

b,
strong {
	font-weight: bold;
}

dfn {
	font-style: italic;
}

mark {
	background: #FFFF27;
	color: #333;
}

sub,
sup {
	font-size: $core-font-size - 0.250;
	line-height: 0;
	position: relative;
	vertical-align: baseline;
}

sup {
	top: -0.5em;
}

sub {
	bottom: -0.25em;
}

img {
	border: 0;
	max-width: 100%;
}

svg:not(:root) {
	overflow: hidden;
}

figure {
	margin: 1em 40px;
}

hr {
	height: 0;
}

pre {
	overflow: auto;
}

code,
kbd,
pre,
samp {
	// font-size: $core-font-size;
}

button,
input,
optgroup,
select,
textarea {
	color: inherit;
	font: inherit;
	margin: 0;
}

button {
	overflow: visible;
}

button,
select {
	text-transform: none;
}

button,
html input[type="button"],
input[type="reset"],
input[type="submit"] {
	-webkit-appearance: button;
	cursor: pointer;
}

button[disabled],
html input[disabled] {
	cursor: default;
}

button::-moz-focus-inner,
input::-moz-focus-inner {
	border: 0;
	padding: 0;
}

input {
	line-height: normal;
}

input[type="checkbox"],
input[type="radio"] {
	padding: 0;
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
	height: auto;
}

input[type="search"] {
	-webkit-appearance: textfield;
}

input[type="search"]::-webkit-search-cancel-button,
input[type="search"]::-webkit-search-decoration {
	-webkit-appearance: none;
}

legend {
	border: 0;
	padding: 0;
}

textarea {
	overflow: auto;
}

optgroup {
	font-weight: bold;
}

table {
	border-collapse: collapse;
	border-spacing: 0;
	table-layout: fixed;
	width: 100%;
}

tr, td, th {
	vertical-align: middle;
}

th, td {
	padding: ($leading-margin / 4) 0;
}

th {
	text-align: left;
}