/**
 * Course hub tool pages (practice exams, key concepts, past papers, bootcamps, flashcards).
 */

.hub-card.active {
	border-color: #007bff;
	box-shadow: 0 8px 16px rgba(0, 123, 255, 0.12);
}

.hub-tool-switcher {
	background: #f8fafc;
	border-bottom: 1px solid #e2e8f0;
	padding: 16px 0 18px;
}

.hub-tool-switcher .container {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
}

.hub-tool-switcher a {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	padding: 8px 14px;
	border-radius: 999px;
	background: #fff;
	border: 1px solid #e2e8f0;
	color: #2d3748;
	text-decoration: none;
	font-size: 0.95rem;
	font-weight: 600;
}

.hub-tool-switcher a:hover,
.hub-tool-switcher a.is-active {
	border-color: #007bff;
	color: #0056b3;
}

.hub-tool-switcher a.is-active {
	background: #eef6ff;
}

.hub-tool-list {
	padding: 40px 0 70px;
}

.hub-resource-list {
	display: flex;
	flex-direction: column;
	gap: 24px;
}

.hub-resource-card {
	background: #fff;
	border: 1px solid #e2e8f0;
	border-radius: 12px;
	box-shadow: 0 4px 6px rgba(0, 0, 0, 0.02);
	overflow: hidden;
}

.hub-resource-card__header {
	display: flex;
	align-items: flex-start;
	gap: 18px;
	padding: 24px 28px 0;
}

.hub-resource-card__icon {
	flex: 0 0 48px;
	width: 48px;
	height: 48px;
	border-radius: 12px;
	display: flex;
	align-items: center;
	justify-content: center;
	color: #fff;
	font-size: 18px;
}

.hub-resource-card__header h3 {
	margin: 0 0 6px;
	font-size: 1.35rem;
	color: #1a202c;
}

.hub-resource-card__excerpt {
	margin: 0;
	color: #718096;
	font-size: 1.05rem;
}

.hub-resource-card__body {
	padding: 16px 28px 28px;
	color: #2d3748;
	font-size: 1.05rem;
	line-height: 1.65;
}

.hub-resource-card__body h4 {
	margin: 1.4em 0 0.6em;
	color: #1a202c;
}

.hub-checklist,
.hub-agenda {
	margin: 0.6em 0 0;
	padding-left: 1.2em;
}

.hub-checklist li,
.hub-agenda li {
	margin-bottom: 0.45em;
}

.hub-copyright {
	background: #fff8eb;
	border-left: 4px solid #d69e2e;
	padding: 12px 14px;
	margin: 0 0 1em;
}

.hub-meta {
	color: #4a5568;
}

.hub-q {
	margin: 1.1em 0 0.35em;
}

.hub-marks {
	color: #4a5568;
	font-weight: 700;
	white-space: nowrap;
}

ol.hub-parts {
	list-style: lower-alpha;
	margin: 0.2em 0 0.8em;
	padding-left: 1.4em;
}

.hub-scheme {
	margin-top: 1.2em;
	padding: 14px 16px;
	background: #f8fafc;
	border: 1px solid #e2e8f0;
	border-radius: 10px;
}

.hub-scheme h4 {
	margin-top: 0;
}

.hub-video {
	margin: 0.8em 0 1em;
	padding: 12px 14px;
	background: #f0f7ff;
	border-radius: 10px;
}

.hub-asset-v3 table {
	width: 100%;
	border-collapse: collapse;
	margin: 0.8em 0 1em;
}

.hub-asset-v3 th,
.hub-asset-v3 td {
	border: 1px solid #e2e8f0;
	padding: 8px 10px;
	text-align: left;
	vertical-align: top;
}

.hub-asset-v3 th {
	background: #f7fafc;
}

.hub-flash-list {
	list-style: none;
	margin: 1em 0 0;
	padding: 0;
}

.hub-flash-list li {
	border: 1px solid #edf2f7;
	border-radius: 10px;
	padding: 14px 16px;
	margin-bottom: 10px;
	background: #f8fafc;
}

.hub-flash-q {
	display: block;
	font-weight: 700;
	color: #1a202c;
	margin-bottom: 6px;
}

.hub-flash-q::before {
	content: "Q ";
	color: #007bff;
	font-size: 0.85em;
}

.hub-flash-a {
	display: block;
	color: #4a5568;
}

.hub-flash-a::before {
	content: "A ";
	color: #28a745;
	font-weight: 700;
	font-size: 0.85em;
}

.hub-empty-state {
	text-align: center;
	max-width: 640px;
	margin: 20px auto 0;
	padding: 40px 24px;
	border: 1px dashed #cbd5e0;
	border-radius: 12px;
	background: #f8fafc;
}

.hub-empty-state__icon {
	width: 64px;
	height: 64px;
	border-radius: 12px;
	margin: 0 auto 16px;
	display: flex;
	align-items: center;
	justify-content: center;
	color: #fff;
	font-size: 24px;
}

.hub-empty-state h3 {
	margin: 0 0 10px;
	color: #1a202c;
}

.hub-empty-state p {
	color: #718096;
	font-size: 1.05rem;
}

.hub-kc-toc {
	position: sticky;
	top: 0;
	z-index: 30;
	background: rgba(248, 250, 252, 0.96);
	backdrop-filter: blur(8px);
	border: 1px solid #e2e8f0;
	border-radius: 12px;
	padding: 14px 18px 16px;
	margin: 0 0 28px;
}

.admin-bar .hub-kc-toc {
	top: 32px;
}

.hub-kc-toc__label {
	margin: 0 0 10px;
	font-size: 0.75rem;
	font-weight: 800;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	color: #718096;
}

.hub-kc-toc__chips {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
}

.hub-kc-toc__chips a {
	display: inline-flex;
	align-items: center;
	padding: 6px 12px;
	border-radius: 999px;
	background: #fff;
	border: 1px solid #e2e8f0;
	color: #2d3748;
	text-decoration: none;
	font-size: 0.9rem;
	font-weight: 600;
}

.hub-kc-toc__chips a:hover,
.hub-kc-toc__chips a.is-active {
	border-color: #007bff;
	color: #0056b3;
	background: #eef6ff;
}

.hub-kc-card {
	scroll-margin-top: 96px;
}

.hub-kc-card__heading {
	flex: 1;
	min-width: 0;
}

.hub-kc-practice {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	margin-top: 12px;
	padding: 8px 14px;
	border-radius: 999px;
	background: #fbc02d;
	color: #1a202c;
	font-weight: 700;
	font-size: 0.95rem;
	text-decoration: none;
}

.hub-kc-practice:hover {
	background: #f9d56e;
	color: #1a202c;
}

.hub-kc-body {
	padding-bottom: 12px;
}

.hub-kc-body.is-collapsible:not(.is-expanded) {
	max-height: 16.5rem;
	overflow: hidden;
	position: relative;
}

.hub-kc-body.is-collapsible:not(.is-expanded)::after {
	content: "";
	position: absolute;
	left: 0;
	right: 0;
	bottom: 0;
	height: 4.5rem;
	background: linear-gradient(to bottom, rgba(255, 255, 255, 0), #fff);
}

.hub-kc-expand {
	display: inline-flex;
	margin: 0 28px 22px;
	padding: 8px 16px;
	border: 1px solid #cbd5e0;
	border-radius: 8px;
	background: #fff;
	color: #0056b3;
	font-weight: 700;
	cursor: pointer;
}

.hub-kc-expand:hover {
	border-color: #007bff;
	background: #eef6ff;
}

.hub-kc-callouts {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
	gap: 12px;
	margin-top: 1.4em;
}

.hub-kc-callout {
	border-radius: 10px;
	padding: 14px 16px;
	border: 1px solid #e2e8f0;
}

.hub-kc-callout h4 {
	margin: 0 0 8px;
	font-size: 0.95rem;
	text-transform: uppercase;
	letter-spacing: 0.04em;
}

.hub-kc-callout p {
	margin: 0;
	font-size: 1rem;
}

.hub-kc-callout--tip {
	background: #eef6ff;
	border-color: #bfdbfe;
}

.hub-kc-callout--tip h4 {
	color: #0056b3;
}

.hub-kc-callout--watch {
	background: #fff8e8;
	border-color: #f6e05e;
}

.hub-kc-callout--watch h4 {
	color: #975a16;
}

.hub-kc-grid-intro {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: 12px 20px;
	margin: 0 0 18px;
}

.hub-kc-grid-intro p {
	margin: 0;
	color: #4a5568;
	font-size: 1.05rem;
	max-width: 46rem;
}

.hub-kc-show-all {
	display: none;
	align-items: center;
	padding: 8px 14px;
	border: 1px solid #cbd5e0;
	border-radius: 999px;
	background: #fff;
	color: #0056b3;
	font-weight: 700;
	cursor: pointer;
}

.hub-kc-layout.is-enhanced .hub-kc-show-all {
	display: inline-flex;
}

.hub-kc-show-all:hover,
.hub-kc-show-all[aria-pressed="true"] {
	border-color: #007bff;
	background: #eef6ff;
}

.hub-kc-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
	gap: 20px;
	margin: 0 0 32px;
}

.hub-kc-topic-card {
	background: #fff;
	border: 1px solid #e2e8f0;
	border-radius: 16px;
	display: flex;
	flex-direction: column;
	min-width: 0;
	box-shadow: 0 4px 6px rgba(0, 0, 0, 0.02);
	transition: border-color 0.2s, box-shadow 0.2s;
}

.hub-kc-topic-card:hover,
.hub-kc-topic-card.is-active {
	border-color: #007bff;
	box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
}

.hub-kc-topic-card.is-active {
	box-shadow: 0 0 0 2px #007bff, 0 12px 24px rgba(15, 23, 42, 0.08);
}

.hub-kc-topic-card__main {
	display: flex;
	flex-direction: column;
	align-items: flex-start;
	gap: 8px;
	flex: 1;
	padding: 22px 22px 8px;
	text-decoration: none;
	color: inherit;
}

.hub-kc-topic-card__main:focus-visible {
	outline: 2px solid #007bff;
	outline-offset: -2px;
}

.hub-kc-topic-card__icon {
	width: 44px;
	height: 44px;
	border-radius: 12px;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	color: #fff;
	font-size: 18px;
}

.hub-kc-topic-card__title {
	font-size: 1.25rem;
	font-weight: 800;
	color: #1a202c;
	line-height: 1.3;
}

.hub-kc-topic-card__count {
	color: #718096;
	font-size: 0.95rem;
	font-weight: 600;
}

.hub-kc-topic-card__concepts {
	list-style: none;
	margin: 8px 0 0;
	padding: 0;
	width: 100%;
}

.hub-kc-topic-card__concepts li {
	position: relative;
	margin: 0 0 6px;
	padding-left: 14px;
	color: #4a5568;
	font-size: 0.95rem;
	line-height: 1.4;
}

.hub-kc-topic-card__concepts li::before {
	content: "";
	position: absolute;
	left: 0;
	top: 0.55em;
	width: 6px;
	height: 6px;
	border-radius: 50%;
	background: #cbd5e0;
}

.hub-kc-topic-card__cta {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 8px;
	width: 100%;
	margin-top: 10px;
	padding-top: 12px;
	border-top: 1px solid #f0f4f8;
	color: #007bff;
	font-weight: 700;
	font-size: 1rem;
}

.hub-kc-topic-card .hub-kc-practice {
	margin: 4px 22px 18px;
	align-self: flex-start;
}

.hub-kc-topic {
	scroll-margin-top: 24px;
}

.hub-kc-topic__header h3 {
	margin: 0 0 16px;
	font-size: 1.75rem;
	color: #1a202c;
}

.hub-kc-layout.is-enhanced:not(.is-show-all) .hub-kc-topic {
	display: none;
}

.hub-kc-layout.is-enhanced:not(.is-show-all) .hub-kc-topic.is-active {
	display: block;
}

.hub-flash-study {
	padding: 8px 28px 8px;
	outline: none;
}

.hub-flash-study:focus-visible {
	box-shadow: inset 0 0 0 2px #007bff;
}

.hub-flash-progress {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 4px 10px;
	margin: 0 0 12px;
	font-weight: 800;
	color: #4a5568;
	letter-spacing: 0.02em;
}

.hub-flash-known-count,
.hub-flash-saved-note {
	font-size: 0.88rem;
	font-weight: 700;
	color: #15803d;
}

.hub-flash-reset {
	margin-left: auto;
	padding: 0;
	border: 0;
	background: transparent;
	color: #0056b3;
	font: inherit;
	font-size: 0.88rem;
	font-weight: 700;
	text-decoration: underline;
	cursor: pointer;
}

.hub-flash-reset:hover,
.hub-flash-reset:focus-visible {
	color: #003d82;
}

.hub-flash-btn:disabled,
.hub-flash-card:disabled {
	opacity: 0.55;
	cursor: default;
}

.hub-flash-study.is-complete .hub-flash-card {
	background: #f0fdf4;
	border-color: #86efac;
}

.hub-flash-stage {
	perspective: 900px;
}

.hub-flash-card {
	display: block;
	width: 100%;
	text-align: left;
	border: 1px solid #e2e8f0;
	border-radius: 14px;
	background: linear-gradient(180deg, #f8fafc 0%, #fff 70%);
	padding: 28px 24px;
	min-height: 180px;
	cursor: pointer;
	color: #1a202c;
	box-shadow: 0 8px 20px rgba(15, 23, 42, 0.06);
}

.hub-flash-card:hover,
.hub-flash-card:focus-visible {
	border-color: #007bff;
}

.hub-flash-card.is-revealed {
	background: #fff;
	border-color: #86efac;
}

.hub-flash-card__kicker {
	display: block;
	font-size: 0.75rem;
	font-weight: 800;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: #007bff;
	margin-bottom: 10px;
}

.hub-flash-card.is-revealed .hub-flash-card__kicker {
	color: #16a34a;
}

.hub-flash-card__text {
	display: block;
	font-size: 1.2rem;
	font-weight: 700;
	line-height: 1.45;
}

.hub-flash-card__reveal {
	display: block;
	margin-top: 18px;
	padding-top: 16px;
	border-top: 1px dashed #cbd5e0;
}

.hub-flash-card__answer {
	display: block;
	font-size: 1.1rem;
	font-weight: 500;
	color: #2d3748;
	line-height: 1.55;
}

.hub-flash-hint {
	margin: 10px 0 0;
	color: #718096;
	font-size: 0.92rem;
}

.hub-flash-controls {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
	margin: 16px 0 8px;
}

.hub-flash-btn {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	padding: 8px 12px;
	border-radius: 8px;
	border: 1px solid #e2e8f0;
	background: #fff;
	color: #2d3748;
	font-weight: 700;
	font-size: 0.92rem;
	cursor: pointer;
}

.hub-flash-btn:hover,
.hub-flash-btn:focus-visible {
	border-color: #007bff;
	color: #0056b3;
}

.hub-flash-btn--primary {
	background: #007bff;
	border-color: #007bff;
	color: #fff;
}

.hub-flash-btn--primary:hover,
.hub-flash-btn--primary:focus-visible {
	background: #0056b3;
	border-color: #0056b3;
	color: #fff;
}

.hub-flash-browse {
	margin: 8px 28px 24px;
	border-top: 1px solid #edf2f7;
	padding-top: 12px;
}

.hub-flash-browse summary {
	cursor: pointer;
	font-weight: 700;
	color: #0056b3;
}

.hub-flash-browse__body {
	padding: 12px 0 8px;
}

@media (max-width: 768px) {
	.hub-resource-card__header {
		flex-direction: column;
		padding: 20px 20px 0;
	}

	.hub-resource-card__body {
		padding: 12px 20px 22px;
	}

	.hub-tool-switcher a {
		font-size: 0.85rem;
	}

	.hub-kc-toc {
		top: 0;
		padding: 12px;
	}

	.admin-bar .hub-kc-toc {
		top: 46px;
	}

	.hub-kc-toc__chips {
		flex-wrap: nowrap;
		overflow-x: auto;
		padding-bottom: 4px;
		-webkit-overflow-scrolling: touch;
	}

	.hub-kc-toc__chips a {
		flex: 0 0 auto;
		font-size: 0.82rem;
	}

	.hub-kc-expand {
		margin: 0 20px 18px;
	}

	.hub-kc-grid {
		grid-template-columns: 1fr;
	}

	.hub-kc-grid-intro {
		align-items: stretch;
	}

	.hub-flash-study {
		padding: 8px 16px;
	}

	.hub-flash-card {
		padding: 20px 16px;
		min-height: 160px;
	}

	.hub-flash-controls {
		gap: 6px;
	}

	.hub-flash-browse {
		margin: 8px 16px 20px;
	}
}

@media print {
	.hub-kc-toc,
	.hub-kc-grid,
	.hub-kc-grid-intro,
	.hub-flash-study,
	.hub-kc-expand,
	.hub-tool-switcher {
		display: none !important;
	}

	.hub-kc-layout.is-enhanced:not(.is-show-all) .hub-kc-topic,
	.hub-kc-topic {
		display: block !important;
	}

	.hub-kc-body.is-collapsible {
		max-height: none !important;
		overflow: visible !important;
	}

	.hub-kc-body.is-collapsible::after {
		display: none;
	}

	.hub-flash-browse {
		display: block;
	}

	.hub-flash-browse__body {
		display: block !important;
	}
}