/* standard classes and general style */

:root {
	--text: #444;
	--accent: #ffd700;
	--bg: #fdfdfd;
	--link-fg: #11699b;
	--nav-bg: #1b465f;
	--toc-active-border: 3px solid #1b465f;
	--nav-fg: #fff;
	--code-fg: #111;
	--code-bg: #ddd;
	--hovered-menu-bg: #5d9abd;
	--toc-bg: #1b465f33;
	--hovered-toc-bg: #1b465f66;
	--toc-fg: #444;
	--hovered-toc-fg: #000;
	--prev-next-separator: none;
	--prev-next-border: thin solid #bbb3;
	--prev-next-bg: var(--toc-bg);
	--hovered-prev-next-bg: var(--hovered-toc-item-bg);
	--search-panel-wrapper-bg: #fffe;
	--search-result-border: none;
	--search-results-bg: #1b465f33;
	--search-result-link-fg: #000c;
	--selected-search-result-bg: #3335;
	--hovered-search-result-link-fg: #000;
	--thead-border: thin solid var(--nav-bg);
	--tr-border: thin solid #d1dadf75;
}

html, body, div, nav, header {
	margin: 0;
	padding: 0;
}
html {
	scroll-padding-top: 80px;
}
body {
	color: var(--text);
	background: var(--bg);
	font-family: Arial, sans-serif;
	font-size: 17px;
	font-weight: 400;
	line-height: 1.5;
	padding-bottom: 80px;
}

@media (min-width: 1400px) { /* wide screens */
	body {
		background-image: linear-gradient(to right, rgba(255,255,255,0.4) 0%, rgba(255,255,255,1) 20%, rgba(255,255,255,1) 75%, rgba(255,255,255,0.4) 100%), url("../img/cows.jpg");
		background-position: center;
		background-size: cover;
		background-attachment: fixed;
	}
}

nav ul {
	list-style-type: none;
}
nav li {
	list-style: none;
	display: inline-block;
}

kbd {
	background: #444;
	border-radius: 2px;
	font-size: 80%;
	font-weight: bold;
	margin: 1px;
    border-radius: 3px;
    box-shadow: inset 0 -1px 0 rgba(0,0,0,.25);
    color: #fff;
    padding: 2px 4px;
}

kbd.b {
	font-size: 18px;
	padding: 0 5px;
}

/* Common nav */

nav ul, nav li, nav a {
	margin: 0;
	padding: 0;
}
nav a {
	color: var(--nav-fg);
	text-decoration: none;
}

/* Top navigation bar */

@media (max-width: 888px) { /* mobile */
	body:has(#nav-toggle:checked) {
		overflow-y: hidden; /* prevent scrolling when menu is open */
	}
	ul.nav-menu {
		background: var(--nav-bg);
		color: var(--nav-fg);
		width: 100%;
		flex-direction: column;
	}
	nav.site-nav {
		flex-direction: column;
	}
	nav.site-nav > ul.nav-menu {
		position: absolute;
		top: 42px;
		left: 0;
		min-width: 200px;
		opacity: 0;
		visibility: hidden;
		transform: translateY(-10px);
		transition: all 0.3s ease;
		flex-direction: column;
		overflow-y: auto;
		max-height: calc(100vh - 42px);
	}
	#nav-toggle {
		display: none; /* hide checkbox */
	}
	.nav-toggle-label {
		padding: 8px 14px;
		border-radius: 5px;
		cursor: pointer;
		display: inline-block;
		user-select: none;
	}
	/* Show menu when hamburger checkbox is checked */
	nav.site-nav #nav-toggle:checked ~ ul.nav-menu {
		opacity: 1;
		visibility: visible;
		transform: translateY(0);
	}
	ul.nav-menu ul.nav-menu .nav-item {
		padding-left: 20px;
	}
	.nav-link img {
		margin: 0 5px;
	}
	.nav-link span {
		margin: 0 2px;
	}
}
@media (min-width: 888px) { /* wide screens */
	nav.site-nav > ul.nav-menu {
		flex-direction: row;
	}
	.nav-item .nav-menu { /* revealed on hover */
		display: none;
		position: relative;
	}
	.nav-item:hover .nav-menu {
		position: absolute;
	}
	#nav-toggle, .nav-toggle-label { /* hide hamburger on wide screens */
		display: none;
	}
	nav.site-nav {
		flex-direction: row;
		align-items: center;
	}
	nav.before-menu {
		padding-left: 10px;
	}
	nav.after-menu {
		padding-right: 10px;
	}
	nav.before-menu, nav.after-menu {
		flex-direction: row;
		align-items: center;
	}
	.nav-link img {
		margin: 0 10px;
	}
	.nav-link span {
		margin: 0 5px;
	}
}

header .nav-link.broot-nav-logo span {
	margin: 0 20px 0 10px;
	font-weight: bold;
}

header {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	z-index: 100;
	display: flex;
	flex-direction: row;
	align-items: center;
	background: var(--nav-bg);
	border-bottom: 1px solid var(--accent);
	justify-content: space-between;
	color: var(--nav-fg);
	box-shadow: 0 0 3px rgba(0,0,0,0.7);
	border-bottom: none;
}
nav.before-menu, nav.after-menu {
	flex: 1 1 10%;
	display: flex;
}
nav.before-menu {
	justify-content: space-between;
}
nav.after-menu {
	justify-content: space-between;
}
nav.site-nav {
	flex: 0 0 auto;
	display: flex;
}
ul.nav-menu {
	flex: 0 0 auto;
	display: flex;
}
nav.site-nav > ul.nav-menu {
	align-items: stretch;
}

nav.site-nav a:hover {
	background: var(--hovered-menu-bg);
}
nav.site-nav .selected a, nav.site-nav .nav-item:has(.selected) > a {
	background: var(--hovered-menu-bg);
}

.nav-item a {
	flex: 0 0 auto;
	padding: 0.8rem 0.5rem;
	display: flex;
}
.nav li {
	flex: 0 0 auto;
	display: flex;
}
.nav-item:has(.nav-menu) > a:after {
	content: " ▼";
	font-size: 0.9rem;
	margin-top: 2px;
	margin-left: 4px;
}
.nav-item:hover .nav-menu {
	display: flex;
	flex-direction: column;
	justify-content: flex-start;
	align-items: stretch;
	background: var(--nav-bg);
	box-shadow: 0 2px 5px rgba(0,0,0,0.5);
}
.nav-item:hover .nav-menu .nav-item {
	flex: 0 0 auto;
}
.nav-item .nav-menu .nav-item a {
	padding: 8px 24px 8px 12px;
}
body .nav-item:hover .nav-menu li.nav-item:hover a {
	background: var(--hovered-menu-bg);
}

.before-menu, .after-menu {
	display: flex;
	flex-direction: row;
	align-items: stretch;
}
.nav-link {
	display: flex;
	flex-direction: row;
	align-items: center;
}
.nav-link img {
	max-width: 40px;
	max-height: 40px;
}
.nav-link:hover {
	color: var(--accent);
}

.external-nav-link, .search-opener {
	opacity: .3;
	transition: opacity .5s;
}
.external-nav-link:hover, .search-opener:hover {
	opacity: 1;
	transition: opacity .5s;
}

/* article layout */

@media (max-width: 888px) { /* mobile */
	aside.page-nav {
		/* display: none; */ /* uncomment to hide side nav on small screens */
	}
	nav.page-toc {
	}
	nav.page-toc ul.toc-content { /* hide TOC on small screens */
		display: none;
	}
	article nav.page-toc a.toc-title { /* still show page name */
		margin-top: 40px;
		margin-left: 0;
		margin-right: 0;
		margin-bottom: 10px;
		padding: 10px 0;
		background: var(--nav-bg);
		display: flex;
		justify-content: center;
		flex-direction: row;
		align-items: center;
		color: var(--nav-fg);
		font-size: 16px;
	}
	main {
		margin: 10px 20px 40px 20px;
	}
}
@media (min-width: 888px) { /* wide screens */
	article {
		margin: 80px auto 40px auto;
		max-width: 1000px;
		display: flex;
		flex-direction: row;
	}
	aside.page-nav {
		flex: 0 0 25%;
		max-width: 25%;
		position: relative;
		padding-right: 20px;
	}
	main {
		flex: 0 1 75%;
		min-width: 0;
	}
}

/* article's TOC */

nav.page-toc {
	top: 80px;
	position: sticky;
	max-height: calc(100vh - 90px);
	overflow-x: hidden;
	overflow-y: auto;
}

nav.page-toc a.toc-title {
	font-weight: bold;
	font-size: 18px;
	margin-left: 20px;
	padding-bottom: 8px;
	align-self: start;
	color: var(--text);
}
nav.page-toc .toc-content {
	background: var(--toc-bg);
	padding-top: 10px;
	padding-bottom: 10px;
	border-radius: 5px;
	width: 100%;
	display: flex;
	flex-direction: column;
	align-items: stretch;
}

nav.page-toc .toc-item {
	border-right: 3px solid transparent;
}
nav.page-toc .toc-item.active {
	border-right: var(--toc-active-border);
}
nav.page-toc .toc-item:hover {
	background: var(--hovered-toc-bg);
}
nav.page-toc a {
	display: inline-block;
	width: 100%;
	color: var(--toc-fg);
}
nav.page-toc .toc-item:hover a {
	color: var(--hovered-toc-fg);
}
nav.page-toc .h1, nav.page-toc .h2 {
	display: flex;
	align-items: stretch;
}
nav.page-toc .h1 a {
	padding: 8px 10px 8px 15px;
	font-size: 100%;
}
nav.page-toc .h2 a {
	padding: 6px 10px 6px 30px;
	font-size: 90%;
}
nav.page-toc .h3 {
	display: none; /* remove this line to show h3 in TOC */
	padding: 6px 10px 6px 40px;
	font-size: 85%;
}
nav.page-toc .h4 {
	display: none; /* remove this line to show h4 in TOC */
	padding: 6px 10px 6px 50px;
	font-size: 80%;
}

/* article main content */

main img {
	max-width: 100%;
	display: block;
	padding: 0;
	line-height: 1.428571429;
	border: none;
	border-radius: 0;
	margin: 10px auto 20px auto;
}

main table {
	margin: 20px 0 35px 0;
	border-collapse: collapse;
}
th, td {
	padding: 10px 4px;
}
table > thead tr {
	border-bottom: var(--thead-border);
}
table tr td {
	border-bottom: var(--tr-border);
}

pre {
    color: #333;
    overflow-x: auto;
	margin: 0 0 20px 0;
	padding: 0;
	border-radius: 5px;
	color: var(--code-fg);
	background: var(--code-bg);
	border: solid 1px var(--code-bg);
	font-weight: normal;
	max-width: 800px;
}

code {
    padding: 2px 5px;
    background: #fff;
    white-space: pre-wrap;
    word-wrap: break-word;
	border-radius: 0;
	color: var(--code-fg);
	background: var(--code-bg);
    font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
	font-size: 80%;
}

pre code {
    display: block;
    background: transparent;
    border: none;
    white-space: pre;
    word-wrap: normal;
}

p {
	margin-top: 0;
	margin-bottom: 1rem;
}
ol, ul, dl {
	margin-top: 0;
	margin-bottom: 1rem;
}

main a {
	text-decoration: underline;
	color: var(--link-fg);
}
main a:hover {
	background: var(--accent);
}

h1 {
	font-size: 22px;
	border-bottom: solid 1px;
	padding-bottom: 9px;
	margin: 30px 0 20px 0;
	border-image-source: linear-gradient(to right, #178accff, #fff0);
	border-image-slice: 1;
}
h2 {
	font-size: 20px;
	border-bottom: solid 1px;
	padding-bottom: 7px;
	margin: 20px 0 10px 0;
	border-image-source: linear-gradient(to right, #178accaa, #fff0, #fff0, #fff0);
	border-image-slice: 1;
}
h3 {
	font-size: 20px;
}
h4 {
	font-size: 18px;
}

.sponsorship {
	margin-top: 20px;
	display: flex;
	flex-direction: row;

}
.sponsorship a {
	margin-right: 10px;
}

/* search */
.ddoc-search-panel-wrapper {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	background: var(--search-panel-wrapper-bg);
	z-index: 200;
}
.ddoc-search-panel {
	position: fixed;
	z-index: 210;
	padding: 0;
	display: flex;
	flex-direction: column;
}
.ddoc-search-controls {
	display: flex;
	flex-direction: row;
	align-items: center;
	padding: 20px;
	border-radius: 10px 10px 0 0;
	background: var(--nav-bg);
}
.ddoc-search-controls input {
	flex: 1 1 auto;
	padding: 5px 5px;
	font-size: 16px;
}
.ddoc-search-close {
	margin-left: 10px;
	padding: 6px 10px;
	font-size: 20px;
	font-weight: bold;
	cursor: pointer;
	color: var(--nav-fg);
}
.ddoc-search-close:hover {
	color: var(--accent);
}
.ddoc-search-results {
	flex: 0 0 auto;
	display: flex;
	flex-direction: column;
	overflow-y: auto;
	background: var(--search-results-bg);
	padding: 0 0 20px 0;
	border-radius: 0 0 10px 10px;
}
.ddoc-search-no-result {
	padding: 10px;
}
.ddoc-search-result + .ddoc-search-result {
	border-top: var(--search-result-border);
}
.ddoc-search-result {
	flex: 0 0 auto;
	padding: 10px;
	display: flex;
	flex-direction: column;
	align-items: stretch;
}
.ddoc-search-result-selected {
	background: var(--selected-search-result-bg);
}
.ddoc-search-result-path {
	flex: 0 0 auto;
	padding: 5px;
	display: flex;
	flex-direction: row;
	align-items: center;
}
.ddoc-search-result-path a {
	color: var(--search-result-link-fg);
}
.ddoc-search-result-path a:hover {
	color: var(--hovered-search-result-link-fg);
}
.ddoc-search-result-path .ddoc-search-result-sep {
	margin: 0 5px;
	color: var(--text);
}
.ddoc-search-result-extract {
	overflow: hidden;
	text-overflow: ellipsis;
	white-space: nowrap;
	background: var(--bg);
	color: var(--text);
	margin-left: 10px;
	padding: 2px;
	font-size: 90%;
	opacity: 0.9;
}
@media (max-width: 880px) { /* mobile */
	.ddoc-search-panel {
		top: 30px;
		left: 10px;
		right: 10px;
	}
	.ddoc-search-results {
		max-height: calc(100vh - 150px);
	}
}
@media (min-width: 880px) { /* wide screens */
	.ddoc-search-panel {
		top: 100px;
		width: 760px;
		left: calc(50% - 380px);
	}
	.ddoc-search-results {
		max-height: calc(100vh - 240px);
	}
}

/* footer */
footer {
	display: flex;
	flex-direction: column;
	align-items: stretch;
	font-size: 85%;
}

/* prev - next page links */

.prev-next {
	display: flex;
	flex-direction: row;
	justify-content: space-between;
	margin: 50px 0 10px 0;
	padding: 20px 0;
	font-size: 87%;
	border-top: var(--prev-next-separator);
}
.prev-next .unexpanded {
	opacity: 0;
}
.prev-next .nav-link.previous-page-link svg, .prev-next .nav-link.next-page-link svg {
	max-width: 20px;
	max-height: 20px;
	margin: 0 0 0 10px;
}
.prev-next .nav-link.previous-page-link svg path,
.prev-next .nav-link.next-page-link svg path {
	fill: var(--text);
	stroke: var(--text);
}
.prev-next .nav-link.previous-page-link:hover svg path,
.prev-next .nav-link.next-page-link:hover svg path {
	fill: #000;
	stroke: #000;
}
.prev-next:has(> .next-page-link):not(:has(> .previous-page-link)) > .next-page-link {
	flex: 0 0 50%;
	max-width: 50%;
	margin-left: auto;
}
.prev-next .nav-link {
	flex: 1 1 30%;
	padding: 10px 15px;
	border: var(--prev-next-border);
	display: flex;
	flex-direction: row;
	align-items: center;
	background: var(--prev-next-bg);
	color: var(--text);
	transition: all 0.3s ease;
}
.prev-next .nav-link:hover {
	background: var(--hovered-toc-bg);
	color: #000;
	transition: all 0.3s ease;
}
.prev-next .previous-page-link {
	justify-content: flex-start;
}
.prev-next .next-page-link {
	justify-content: flex-end;
}
@media (max-width: 768px) { /* mobile */
	.prev-next .nav-link {
		padding: 10px 2px;
	}
	.prev-next .nav-link.previous-page-link {
		margin-right: 2px;
	}
	.prev-next .nav-link.next-page-link {
		margin-left: 2px;
	}
}
@media (min-width: 768px) { /* wide screens */
	.prev-next .nav-link {
		padding: 10px 15px;
		border-radius: 5px;
	}
	.prev-next .nav-link.previous-page-link {
		margin-right: 5px;
	}
	.prev-next .nav-link.next-page-link {
		margin-left: 5px;
	}
}
