:root {
	--color-bg: #181a1b;
	--color-border: white;
	--color-link: #3d84ff;
	--color-txt: white;
	--font-size: 1em;
	--h1-ln-h-using: var(--h1-ln-h);
	--h1-ln-h: 1em;
	--h1-size-using: var(--h1-size);
	--h1-size: 1.6em;
	--h2-ln-h: 1em;
	--h2-size: 2em;
	--h3-size: 1.17em;
	--ln-h: 1.429em;
	--margin-pad-full: 0.7em;
	--margin-pad-half: 0.35em;
	--margin-pad-social: 0.2em;
	--sk3-sidebar-pad-down: 2.3em;
	--sk3-sidebar-width: 200px;
	--social-btn-size: 24px;
	--toc-pad: 1.4em;
	--width-card: 32%;
	--width-html: 1200px;
}

@media only screen and (max-width: 992px) {
	.sk3-card {
		width: 100%
	}
}

@media only screen and (min-width: 993px) {
	.sk3-card {
		width: var(--width-card);
	}
}

h1 {
	font-size: var(--h1-size-using);
	line-height: var(--h1-ln-h-using);
}

h2 {
	font-size: var(--h2-size);
	line-height: var(--h2-ln-h);
}

h3 {
	font-size: var(--h3-size);
}

html {
	background-color: var(--color-bg);
	border-color: var(--color-border);
	color: var(--color-txt);
	font-family: Arial, Helvetica, sans-serif, "Lucida Console", Monaco, monospace;
	font-size: var(--font-size);
	line-height: var(--ln-h);
}

body {
	margin-left: auto;
	margin-right: auto;
	max-width: var(--width-html);
}

#content,
header,
footer {
	display: block;
	margin: var(--margin-pad-full);
}

a {
	color: var(--color-link);
	text-decoration: none;
}

a:hover {
	text-decoration: underline;
}

header a,
header h1 {
	margin-block-end: 0;
	margin-block-start: 0;
	margin: 0;
	padding-block-end: 0;
	padding-block-start: 0;
	padding: 0;
}

img {
	display: block;
	margin-left: auto;
	margin-right: auto;
	max-width: 100%;
}

kbd {
	border: 1px solid;
	border-radius: var(--margin-pad-half);
	padding: var(--margin-pad-half);
}

table {
	border-collapse: collapse;
	display: block;
	margin: 0 auto;
	max-width: fit-content;
	overflow-x: auto;
	white-space: nowrap;
}

td,
th,
td {
	text-align: left;
	padding: var(--margin-pad-half);
	border: 1px solid;
}

.box {
	border: 1px solid;
	border-color: var(--color-border);
	padding: var(--margin-pad-full);
}

.box-right {
	border-right: 1px solid;
	border-color: var(--color-border);
}

.box-top {
	border-top: 1px solid;
	border-color: var(--color-border);
}

.txt-center-h {
	text-align: center;
}

.txt-right {
	text-align: right;
}

/* SK3 */

.sk3-card {
	padding: var(--margin-pad-full);
	margin: var(--margin-pad-half);
	box-sizing: border-box;
}

.sk3-card h3 {
	margin-block-end: 1px;
	margin-block-start: 1px;
}

.sk3-card p {
	margin-block-end: 1px;
	margin-block-start: var(--margin-pad-half);
}

.sk3-flex {
	display: flex;
	flex-wrap: wrap;
}

.sk3-flex-center-h {
	justify-content: center;
}

.sk3-flex-center-v {
	margin-top: auto;
	margin-bottom: auto;
}

.sk3-flex-down {
	margin-top: auto;
}

.sk3-flex-inline {
	display: inline-flex;
}

.sk3-flex-right {
	display: flex;
	margin-left: auto;
}

.sk3-flex-up {
	margin-bottom: auto;
}

.sk3-margin {
	margin: var(--margin-pad-half);
}

.sk3-margin-10 {
	margin: var(--margin-pad-full);
}

.sk3-margin-down {
	margin-top: 2px;
}

.sk3-margin-h {
	margin-left: var(--margin-pad-half);
	margin-right: var(--margin-pad-half);
}

.sk3-margin-h-full {
	margin-left: var(--margin-pad-full);
	margin-right: var(--margin-pad-full);
}

.sk3-margin-r {
	margin-right: var(--margin-pad-half);
}

.sk3-margin-v {
	margin-top: var(--margin-pad-half);
	margin-bottom: var(--margin-pad-half);
}

.sk3-margin-v-full {
	margin-top: var(--margin-pad-full);
	margin-bottom: var(--margin-pad-full);
}

.sk3-pad {
	padding: var(--margin-pad-half);
}

.sk3-pad-full {
	padding: var(--margin-pad-full);
}

.sk3-pad-h {
	padding-left: var(--margin-pad-half);
	padding-right: var(--margin-pad-half);
}

.sk3-pad-h-full {
	padding-left: var(--margin-pad-full);
	padding-right: var(--margin-pad-full);
}

.sk3-pad-v {
	padding-top: var(--margin-pad-half);
	padding-bottom: var(--margin-pad-half);
}

.sk3-pad-v-full {
	padding-top: var(--margin-pad-full);
	padding-bottom: var(--margin-pad-full);
}

.sk3-sidebar {
	background-color: var(--color-bg);
	bottom: 0;
	display: none;
	overflow: auto;
	padding-top: var(--sk3-sidebar-pad-down);
	position: fixed !important;
	top: 0;
	width: var(--sk3-sidebar-width);
	z-index: 2;
}

.sk3-sidebar-btn {
	background-color: var(--color-bg);
	font-size: var(--h1-size-using);
	font-weight: bold;
	line-height: var(--h1-ln-h-using);
	position: fixed !important;
	z-index: 3;
}

.sk3-sidebar-list-item {
	font-weight: bold;
	list-style-type: none;
}

.sk3-sidebar-mask {
	bottom: 0;
	display: none;
	left: 0;
	opacity: 0;
	position: fixed !important;
	right: 0;
	top: 0;
	z-index: 1;
}

.sk3-sub-title {
	font-size: var(--h3-size);
	font-weight: bold;
	line-height: var(--h1-size-using);
}

.sk3-title-pad-left {
	padding-left: var(--h1-size-using);
}

sk3-pager {
	font-size: var(--h3-size);
	font-weight: bold;
	padding-bottom: var(--margin-pad-half);
	padding-top: var(--margin-pad-half);
}

sk3-pager li {
	list-style-type: none;
	display: inline-block;
	padding-left: var(--margin-pad-half);
	padding-right: var(--margin-pad-half);
}

sk3-pager ul {
	padding: 0;
}

sk3-pager li.active {
	border: 1px solid;
	border-color: var(--color-link);
	;
}

sk3-social {
	font-size: var(--h1-size);
}

sk3-social a {
	margin: var(--margin-pad-social);
}

sk3-toc {
	display: none;
}

sk3-toc li {
	list-style-type: none;
}

sk3-toc ul {
	margin-left: 0;
	padding-left: var(--margin-pad-half);
}

sk3-toc ul ul {
	margin-left: 0;
	padding-left: var(--toc-pad);
}

/* svg */
.sk3-social-fab {
	height: var(--social-btn-size);
	width: var(--social-btn-size);
	opacity: 0.7;
	fill: var(--color-link);
}

.sk3-social-fab:hover {
	opacity: 1;
}

/* Font Awesome webfont */
.fab {
	font-size: var(--social-btn-size);
	padding: 2px;
	text-align: center;
	opacity: 0.7;
}

.fab:hover {
	opacity: 1;
}