/* LxMLS Lab Guide — web styling. Palette matches the site (primary #2B5D93). */

:root {
	--guide-primary: #2B5D93;
	--guide-primary-dark: #1f4870;
	--guide-accent: #F96D00;
	--guide-border: #e3e7ee;
	--guide-code-bg: #f6f8fa;
	--guide-text: #2b2b2b;
}

.guide-body {
	background: #ffffff;
	color: var(--guide-text);
}

.guide-wrap {
	max-width: 1400px;
	margin: 0 auto;
	padding: 0 15px;
}

/* ---------- Sidebar table of contents ---------- */
.guide-sidebar {
	padding-top: 2.5rem;
}
.guide-sidebar-inner {
	position: sticky;
	top: 1rem;
	max-height: calc(100vh - 2rem);
	overflow-y: auto;
	border-right: 1px solid var(--guide-border);
	padding-right: 1rem;
	font-size: 0.9rem;
}
.guide-sidebar-home {
	display: block;
	font-weight: 700;
	color: var(--guide-primary);
	margin-bottom: 1rem;
	text-decoration: none;
}
.guide-sidebar nav ul {
	list-style: none;
	padding-left: 0;
	margin-bottom: 0;
}
.guide-sidebar nav ul ul {
	padding-left: 0.9rem;
}
.guide-sidebar nav a {
	display: block;
	padding: 2px 0;
	color: #4a5568;
	text-decoration: none;
	line-height: 1.3;
}
.guide-sidebar nav a:hover {
	color: var(--guide-primary);
}
.guide-sidebar nav a.toc-h2 { font-weight: 600; margin-top: 0.35rem; }
.guide-sidebar nav a.toc-h3 { font-size: 0.86rem; }

/* Mobile "Contents" toggle (hidden at >= md, where the sidebar is always shown) */
.guide-sidebar-toggle {
	display: block;
	width: 100%;
	text-align: left;
	font-weight: 700;
	color: var(--guide-primary);
	background: var(--guide-code-bg);
	border: 1px solid var(--guide-border);
	border-radius: 6px;
	padding: 0.6rem 0.9rem;
	margin: 0.5rem 0 0.5rem;
	cursor: pointer;
}
.guide-sidebar-toggle::before {
	content: "\2630";
	margin-right: 0.5rem;
}
@media (max-width: 767.98px) {
	.guide-sidebar { padding-top: 1rem; }
	.guide-sidebar-inner {
		position: static;
		max-height: none;
		overflow: visible;
		border-right: 0;
		padding-right: 0;
	}
	#guide-toc {
		border: 1px solid var(--guide-border);
		border-radius: 6px;
		padding: 0.5rem 1rem;
		margin-bottom: 1rem;
	}
}

/* ---------- Main content ---------- */
.guide-main {
	padding-top: 2.5rem;
	padding-bottom: 4rem;
}
.guide-content {
	max-width: 820px;
	font-size: 1.02rem;
	line-height: 1.7;
}
.guide-content h1, .guide-content h2, .guide-content h3,
.guide-content h4, .guide-content h5 {
	color: var(--guide-primary-dark);
	font-weight: 700;
	margin-top: 2.2rem;
	margin-bottom: 0.9rem;
	scroll-margin-top: 1rem;
}
.guide-content h1 { font-size: 2.1rem; border-bottom: 3px solid var(--guide-primary); padding-bottom: 0.4rem; }
.guide-content h2 { font-size: 1.6rem; }
.guide-content h3 { font-size: 1.3rem; }
.guide-content h4 { font-size: 1.1rem; }
.guide-content a { color: var(--guide-primary); }
.guide-content p { margin-bottom: 1rem; }

/* ---------- Code blocks ---------- */
.guide-content pre {
	position: relative;
	background: var(--guide-code-bg);
	border: 1px solid var(--guide-border);
	border-left: 4px solid var(--guide-primary);
	border-radius: 6px;
	padding: 1rem 1rem 1rem 1.1rem;
	overflow-x: auto;
	margin: 1.2rem 0;
}
.guide-content pre code {
	font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
	font-size: 0.86rem;
	line-height: 1.5;
	background: none;
	padding: 0;
	color: #24292e;
}
/* inline code */
.guide-content code:not(pre code) {
	background: var(--guide-code-bg);
	border: 1px solid var(--guide-border);
	border-radius: 4px;
	padding: 0.1em 0.35em;
	font-size: 0.88em;
	color: #b5145e;
}

/* copy button */
.guide-copy-btn {
	position: absolute;
	top: 0.45rem;
	right: 0.45rem;
	font-size: 0.72rem;
	line-height: 1;
	padding: 0.35rem 0.6rem;
	border: 1px solid var(--guide-border);
	border-radius: 4px;
	background: #fff;
	color: var(--guide-primary);
	cursor: pointer;
	opacity: 0;
	transition: opacity 0.15s ease-in-out;
}
.guide-content pre:hover .guide-copy-btn { opacity: 1; }
.guide-copy-btn:hover { background: var(--guide-primary); color: #fff; }
.guide-copy-btn.copied { background: #2e7d32; color: #fff; border-color: #2e7d32; opacity: 1; }

/* ---------- Theorem-like boxes ---------- */
.guide-box {
	border: 1px solid var(--guide-border);
	border-left: 4px solid var(--guide-primary);
	border-radius: 6px;
	background: #fbfcfe;
	padding: 1rem 1.2rem;
	margin: 1.4rem 0;
}
.guide-box-title {
	font-weight: 700;
	color: var(--guide-primary-dark);
	margin-bottom: 0.5rem;
}
.guide-box > *:last-child { margin-bottom: 0; }
.guide-exercise { border-left-color: var(--guide-accent); background: #fff8f2; }
.guide-exercise .guide-box-title { color: #c2530a; }
.guide-definition { border-left-color: #2e7d32; }
.guide-theorem { border-left-color: #6a1b9a; }

/* ---------- Algorithm blocks ---------- */
.guide-algorithm {
	/* override the centered alignment inherited from .guide-content figure */
	text-align: left;
	border: 1px solid var(--guide-border);
	border-left: 4px solid var(--guide-primary);
	border-radius: 6px;
	background: var(--guide-code-bg);
	padding: 0.7rem 1rem 0.8rem;
	margin: 1.6rem 0;
}
.guide-algorithm figcaption {
	font-weight: 700;
	color: var(--guide-primary-dark);
	border-bottom: 1px solid var(--guide-border);
	padding-bottom: 0.45rem;
	margin-bottom: 0.6rem;
	text-align: left;
}
.guide-algorithm .algo-body {
	font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
	font-size: 0.85rem;
	line-height: 1.6;
}
.guide-algorithm .algo-line {
	text-align: left;
	white-space: normal;
}
.guide-algorithm .algo-num {
	display: inline-block;
	min-width: 1.8em;
	margin-right: 0.7em;
	text-align: right;
	color: #8895a7;
	user-select: none;
	-webkit-user-select: none;
}

/* ---------- Figures ---------- */
.guide-content figure, .guide-content .figure {
	text-align: center;
	margin: 1.6rem 0;
}
.guide-content img {
	max-width: 100%;
	height: auto;
}
.guide-content figcaption, .guide-content .caption {
	font-size: 0.9rem;
	color: #5a6472;
	margin-top: 0.5rem;
}

/* ---------- Tables ---------- */
.guide-content table {
	border-collapse: collapse;
	margin: 1.4rem 0;
	width: auto;
	font-size: 0.95rem;
}
.guide-content table th, .guide-content table td {
	border: 1px solid var(--guide-border);
	padding: 0.45rem 0.7rem;
	text-align: left;
}
.guide-content table th { background: var(--guide-code-bg); }

/* ---------- Math overflow ---------- */
.guide-content mjx-container[display="true"] {
	overflow-x: auto;
	overflow-y: hidden;
	max-width: 100%;
}

/* ---------- Prev/next page nav ---------- */
.guide-pagenav {
	display: flex;
	justify-content: space-between;
	gap: 1rem;
	margin-top: 3rem;
	padding-top: 1.5rem;
	border-top: 1px solid var(--guide-border);
	max-width: 820px;
}
.guide-pagenav a {
	flex: 1;
	padding: 0.8rem 1rem;
	border: 1px solid var(--guide-border);
	border-radius: 6px;
	text-decoration: none;
	color: var(--guide-primary);
}
.guide-pagenav a:hover { border-color: var(--guide-primary); }
.guide-pagenav a.next { text-align: right; }
.guide-pagenav .label { display: block; font-size: 0.75rem; color: #8895a7; text-transform: uppercase; }
.guide-pagenav .title { font-weight: 600; }

/* ---------- Landing page cards ---------- */
.guide-landing-hero {
	background: var(--guide-primary);
	color: #fff;
	padding: 3rem 0;
	margin-bottom: 2.5rem;
}
.guide-landing-hero h1 { color: #fff; font-weight: 700; }
.guide-day-card {
	display: block;
	height: 100%;
	border: 1px solid var(--guide-border);
	border-radius: 8px;
	padding: 1.4rem;
	text-decoration: none;
	color: var(--guide-text);
	transition: box-shadow 0.15s, transform 0.15s;
}
.guide-day-card:hover {
	box-shadow: 0 6px 22px rgba(43, 93, 147, 0.15);
	transform: translateY(-2px);
	text-decoration: none;
	color: var(--guide-text);
}
.guide-day-card .day-num {
	font-size: 0.8rem;
	font-weight: 700;
	text-transform: uppercase;
	color: var(--guide-accent);
}
.guide-day-card .day-title {
	font-size: 1.25rem;
	font-weight: 700;
	color: var(--guide-primary-dark);
	margin: 0.3rem 0 0.6rem;
}

/* footnotes */
.guide-content .footnotes {
	margin-top: 3rem;
	padding-top: 1rem;
	border-top: 1px solid var(--guide-border);
	font-size: 0.9rem;
	color: #5a6472;
}