/*
 * PSG Knowledge Center — ACS-02
 * Visual system follows ACS-01 class DNA: restrained editorial layout,
 * white space, thin rules, neutral surfaces, and PSG blue accent.
 */
.knowledge-article--acs {
	--knowledge-accent: #0047ff;
	--knowledge-ink: #17191d;
	--knowledge-muted: #6d737d;
	--knowledge-line: #e5e7eb;
	--knowledge-soft: #f7f8fa;
	--knowledge-paper: #ffffff;
	color: var(--knowledge-ink);
	background: var(--knowledge-paper);
	font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
	font-size: 16px;
	line-height: 1.75;
}

.knowledge-article--acs *,
.knowledge-article--acs *::before,
.knowledge-article--acs *::after {
	box-sizing: border-box;
}

.knowledge-article--acs a {
	color: var(--knowledge-accent);
	text-decoration: none;
}

.knowledge-article--acs a:hover {
	text-decoration: underline;
	text-underline-offset: 3px;
}

.knowledge-hero {
	padding: clamp(64px, 9vw, 132px) 24px clamp(52px, 7vw, 96px);
	border-bottom: 1px solid var(--knowledge-line);
	background: #fff;
}

.knowledge-hero__inner {
	width: min(100%, 1120px);
	margin: 0 auto;
}

.knowledge-hero__eyebrow {
	display: flex;
	align-items: center;
	gap: 12px;
	color: var(--knowledge-muted);
	font-size: 11px;
	font-weight: 650;
	letter-spacing: .14em;
	line-height: 1.5;
	text-transform: uppercase;
}

.knowledge-hero__divider {
	display: inline-block;
	width: 34px;
	height: 1px;
	background: var(--knowledge-accent);
}

.knowledge-hero__category {
	margin: 48px 0 12px;
	color: var(--knowledge-accent);
	font-size: 12px;
	font-weight: 650;
	letter-spacing: .1em;
	text-transform: uppercase;
}

.knowledge-hero__title {
	max-width: 900px;
	margin: 0;
	font-size: clamp(42px, 7.2vw, 88px);
	font-weight: 560;
	letter-spacing: -.065em;
	line-height: .99;
}

.knowledge-hero__technical {
	max-width: 760px;
	margin: 20px 0 0;
	color: #555c66;
	font-size: clamp(18px, 2.2vw, 25px);
	font-weight: 400;
	letter-spacing: -.025em;
	line-height: 1.4;
}

.knowledge-hero__abstract {
	max-width: 780px;
	margin: 28px 0 0;
	color: #555c66;
	font-size: 17px;
	line-height: 1.85;
}

.knowledge-hero__keywords {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
	margin-top: 28px;
}

.knowledge-hero__keywords span {
	padding: 5px 10px;
	border: 1px solid var(--knowledge-line);
	border-radius: 999px;
	color: #4d535d;
	font-size: 11px;
	line-height: 1.5;
}

.knowledge-layout {
	display: grid;
	grid-template-columns: minmax(190px, 245px) minmax(0, 1fr);
	gap: clamp(36px, 6vw, 100px);
	width: min(100% - 48px, 1280px);
	margin: 0 auto;
	padding: 64px 0 112px;
}

.knowledge-sidebar {
	min-width: 0;
}

.knowledge-sidebar__inner {
	position: sticky;
	top: 32px;
}

.knowledge-sidebar__eyebrow {
	margin: 0 0 18px;
	color: #858b95;
	font-size: 10px;
	font-weight: 700;
	letter-spacing: .15em;
	text-transform: uppercase;
}

.knowledge-toc {
	display: grid;
	gap: 2px;
	border-left: 1px solid var(--knowledge-line);
}

.knowledge-toc a {
	position: relative;
	display: block;
	padding: 8px 12px 8px 16px;
	color: #646b75;
	font-size: 12px;
	line-height: 1.55;
	transition: color .2s ease;
}

.knowledge-toc a:hover {
	color: var(--knowledge-accent);
	text-decoration: none;
}

.knowledge-toc a:focus-visible {
	outline: 2px solid var(--knowledge-accent);
	outline-offset: 2px;
}

.knowledge-content {
	min-width: 0;
	max-width: 900px;
}

.knowledge-section {
	padding: 0 0 60px;
	margin: 0 0 60px;
	border-bottom: 1px solid var(--knowledge-line);
	scroll-margin-top: 32px;
}

.knowledge-section:last-child {
	margin-bottom: 0;
}

.knowledge-section__index {
	display: inline-block;
	margin-bottom: 12px;
	color: var(--knowledge-accent);
	font-size: 11px;
	font-weight: 700;
	letter-spacing: .12em;
	font-variant-numeric: tabular-nums;
}

.knowledge-section__title {
	max-width: 760px;
	margin: 0 0 22px;
	font-size: clamp(28px, 4vw, 44px);
	font-weight: 560;
	letter-spacing: -.045em;
	line-height: 1.12;
}

.knowledge-section__lead {
	max-width: 760px;
	margin: -4px 0 28px;
	color: var(--knowledge-muted);
	font-size: 15px;
	line-height: 1.8;
}

.knowledge-section__body {
	color: #3f454e;
	font-size: 15px;
	line-height: 1.9;
}

.knowledge-section__body > p:first-child {
	margin-top: 0;
}

.knowledge-section__body > p:last-child {
	margin-bottom: 0;
}

.knowledge-objectives,
.knowledge-limitations,
.knowledge-data-list {
	margin: 18px 0 0;
	padding-left: 22px;
	color: #414750;
}

.knowledge-objectives li,
.knowledge-limitations li,
.knowledge-data-list li {
	padding-left: 5px;
	margin: 0 0 11px;
	line-height: 1.75;
}

.knowledge-objectives li::marker,
.knowledge-limitations li::marker,
.knowledge-data-list li::marker {
	color: #9aa0aa;
}

.knowledge-data-list li > p {
	margin: 7px 0;
}

.knowledge-data-list li > strong {
	display: inline-block;
	margin: 0 5px 4px 0;
	color: #242830;
	font-weight: 650;
}

.knowledge-data-number {
	display: inline-block;
	margin-right: 8px;
	color: var(--knowledge-accent);
	font-size: 11px;
	font-weight: 700;
	font-variant-numeric: tabular-nums;
}

.knowledge-data-list--nested {
	margin-top: 10px;
	font-size: 14px;
}

.knowledge-subsection {
	margin: 16px 0;
	padding: 16px 18px;
	border-left: 2px solid #dbe3ff;
	background: #fafbff;
}

.knowledge-subsection h4,
.knowledge-learning-card__details h4,
.knowledge-workflow__details h4 {
	margin: 0 0 8px;
	color: #333943;
	font-size: 12px;
	font-weight: 700;
	letter-spacing: .02em;
}

.knowledge-learning-grid {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 14px;
	margin-top: 30px;
}

.knowledge-learning-card {
	min-width: 0;
	padding: 24px;
	border: 1px solid var(--knowledge-line);
	border-radius: 4px;
	background: #fff;
	scroll-margin-top: 30px;
}

.knowledge-learning-card__top {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 12px;
	padding-bottom: 18px;
	margin-bottom: 20px;
	border-bottom: 1px solid var(--knowledge-line);
}

.knowledge-learning-card__number {
	color: var(--knowledge-accent);
	font-size: 12px;
	font-weight: 750;
	letter-spacing: .1em;
	font-variant-numeric: tabular-nums;
}

.knowledge-learning-card__slug {
	color: #8a9099;
	font-size: 9px;
	letter-spacing: .08em;
	text-align: right;
	text-transform: uppercase;
}

.knowledge-learning-card h3 {
	margin: 0 0 12px;
	font-size: 21px;
	font-weight: 600;
	letter-spacing: -.035em;
	line-height: 1.25;
}

.knowledge-learning-card > p {
	margin: 0;
	color: #5a606a;
	font-size: 13px;
	line-height: 1.8;
}

.knowledge-learning-card__details {
	padding-top: 17px;
	margin-top: 18px;
	border-top: 1px solid #eef0f3;
}

.knowledge-learning-card__details .knowledge-data-list {
	margin-top: 8px;
	padding-left: 18px;
	font-size: 12px;
}

.knowledge-note {
	padding: 15px 17px;
	margin-top: 18px;
	border-left: 2px solid var(--knowledge-accent);
	background: var(--knowledge-soft);
}

.knowledge-note strong {
	display: block;
	margin-bottom: 5px;
	color: #303640;
	font-size: 12px;
}

.knowledge-note p {
	margin: 0;
	color: #555c66;
	font-size: 13px;
	line-height: 1.75;
}

.knowledge-workflow {
	margin-top: 28px;
}

.knowledge-workflow__item {
	display: grid;
	grid-template-columns: 52px minmax(0, 1fr);
	gap: 22px;
	padding: 28px 0;
	border-top: 1px solid var(--knowledge-line);
}

.knowledge-workflow__item:last-child {
	border-bottom: 1px solid var(--knowledge-line);
}

.knowledge-workflow__number {
	display: flex;
	align-items: flex-start;
	justify-content: center;
	padding-top: 2px;
	color: var(--knowledge-accent);
	font-size: 12px;
	font-weight: 750;
	font-variant-numeric: tabular-nums;
}

.knowledge-workflow__content {
	min-width: 0;
}

.knowledge-workflow__technical {
	margin: 0 0 5px;
	color: #838a94;
	font-size: 10px;
	font-weight: 650;
	letter-spacing: .1em;
	text-transform: uppercase;
}

.knowledge-workflow__content h3 {
	margin: 0 0 10px;
	font-size: 22px;
	font-weight: 600;
	letter-spacing: -.035em;
	line-height: 1.3;
}

.knowledge-workflow__content > p:not(.knowledge-workflow__technical) {
	margin: 0;
	color: #555c66;
	font-size: 14px;
	line-height: 1.85;
}

.knowledge-workflow__details {
	margin-top: 20px;
}

.knowledge-workflow__details .knowledge-data-list {
	margin-top: 8px;
	font-size: 13px;
}

.knowledge-principles {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 12px;
	margin-top: 26px;
}

.knowledge-principle {
	padding: 22px;
	border: 1px solid var(--knowledge-line);
	background: #fff;
}

.knowledge-principle h3 {
	margin: 0 0 10px;
	font-size: 17px;
	font-weight: 620;
	letter-spacing: -.025em;
	line-height: 1.35;
}

.knowledge-principle p {
	margin: 0;
	color: #5b626c;
	font-size: 13px;
	line-height: 1.8;
}

.knowledge-section--transition {
	padding: 28px;
	border: 1px solid var(--knowledge-line);
	background: #fafbfc;
}

.knowledge-section--transition .knowledge-section__body {
	font-size: 14px;
}

.knowledge-references {
	display: grid;
	gap: 0;
	margin-top: 28px;
	border-top: 1px solid var(--knowledge-line);
}

.knowledge-reference {
	padding: 24px 0;
	border-bottom: 1px solid var(--knowledge-line);
}

.knowledge-reference__type {
	display: inline-block;
	margin-bottom: 8px;
	color: var(--knowledge-accent);
	font-size: 10px;
	font-weight: 700;
	letter-spacing: .1em;
	text-transform: uppercase;
}

.knowledge-reference h3 {
	margin: 0 0 6px;
	font-size: 18px;
	font-weight: 620;
	letter-spacing: -.025em;
	line-height: 1.4;
}

.knowledge-reference__organization {
	margin: 0 0 12px;
	color: #747b85;
	font-size: 12px;
	line-height: 1.7;
}

.knowledge-reference__scope .knowledge-data-list {
	margin: 8px 0 14px;
	font-size: 13px;
}

.knowledge-reference > a {
	display: inline-flex;
	align-items: center;
	gap: 7px;
	font-size: 12px;
	font-weight: 650;
}

.knowledge-reference__note {
	color: #737a84;
	font-size: 12px;
	font-style: italic;
}

.knowledge-editorial {
	padding: 26px;
	border: 1px solid var(--knowledge-line);
	background: #fafafa;
}

.knowledge-editorial h2 {
	margin: 0 0 12px;
	font-size: 20px;
	font-weight: 620;
	letter-spacing: -.03em;
}

.knowledge-editorial > p {
	color: #5c626c;
	font-size: 13px;
	line-height: 1.8;
}

.knowledge-editorial__status {
	padding-top: 16px;
	margin-top: 18px;
	border-top: 1px solid var(--knowledge-line);
}

.knowledge-editorial__status span {
	display: block;
	margin-bottom: 4px;
	color: #858b95;
	font-size: 10px;
	font-weight: 700;
	letter-spacing: .1em;
	text-transform: uppercase;
}

.knowledge-editorial__status p {
	margin: 0;
	color: #3d434c;
	font-size: 13px;
}

.knowledge-editorial__date {
	margin-bottom: 0;
	color: #858b95;
	font-size: 11px !important;
}

@media (max-width: 900px) {
	.knowledge-layout {
		grid-template-columns: minmax(0, 1fr);
		gap: 38px;
		width: min(100% - 40px, 760px);
		padding-top: 42px;
	}

	.knowledge-sidebar__inner {
		position: static;
	}

	.knowledge-toc {
		grid-template-columns: repeat(2, minmax(0, 1fr));
		border-left: 0;
		border-top: 1px solid var(--knowledge-line);
	}

	.knowledge-toc a {
		padding: 10px 10px 10px 0;
		border-bottom: 1px solid var(--knowledge-line);
	}
}

@media (max-width: 600px) {
	.knowledge-hero {
		padding: 54px 20px 48px;
	}

	.knowledge-hero__category {
		margin-top: 36px;
	}

	.knowledge-hero__abstract {
		font-size: 15px;
	}

	.knowledge-layout {
		width: calc(100% - 40px);
		padding: 34px 0 72px;
	}

	.knowledge-toc {
		grid-template-columns: minmax(0, 1fr);
	}

	.knowledge-section {
		padding-bottom: 42px;
		margin-bottom: 42px;
	}

	.knowledge-learning-grid,
	.knowledge-principles {
		grid-template-columns: minmax(0, 1fr);
	}

	.knowledge-learning-card {
		padding: 20px;
	}

	.knowledge-workflow__item {
		grid-template-columns: 34px minmax(0, 1fr);
		gap: 12px;
		padding: 23px 0;
	}

	.knowledge-workflow__content h3 {
		font-size: 19px;
	}

	.knowledge-section--transition,
	.knowledge-editorial {
		padding: 20px;
	}
}

@media (prefers-reduced-motion: reduce) {
	.knowledge-toc a {
		transition: none;
	}
}