.gre-concept-long {
	--gre-brand: #8222ee;
	--gre-brand-dark: #5f14b7;
	--gre-brand-deep: #30104f;
	--gre-brand-soft: #f4edff;
	--gre-brand-border: #d8c2ff;
	max-width: 1180px;
	margin: 0 auto;
	padding: 30px;
	background: #f8fafc;
	color: #172033;
	font-family: inherit;
	line-height: 1.65;
}

.gre-concept-long * {
	box-sizing: border-box;
}

.gre-concept-long h1,
.gre-concept-long h2,
.gre-concept-long h3 {
	line-height: 1.18;
}

.gre-concept-long h1 {
	margin: 0 0 12px;
	font-size: 40px;
}

.gre-concept-long h2 {
	margin: 0 0 14px;
	font-size: 26px;
	color: var(--gre-brand-deep);
}

.gre-concept-long h3 {
	margin: 0 0 10px;
	font-size: 19px;
	color: #4a177c;
}

.gre-concept-long p {
	margin: 0 0 12px;
	color: #43536a;
}

.gre-concept-hero {
	padding: 36px;
	border-radius: 8px;
	color: #fff;
	background: linear-gradient(135deg, #8222ee 0%, #741bd8 56%, #5f14b7 100%) !important;
	border-left: 8px solid #c4a1ff;
	box-shadow: 0 18px 38px rgba(48, 16, 79, .2);
	scroll-margin-top: 120px;
}

.gre-concept-hero p {
	color: rgba(255, 255, 255, .9) !important;
	font-size: 17px;
	max-width: 920px;
}

.gre-concept-long .gre-concept-hero h1,
.gre-concept-hero h1 {
	color: #fff !important;
}

.gre-concept-kicker {
	margin: 0 0 8px;
	text-transform: uppercase;
	letter-spacing: .09em;
	color: rgba(255, 255, 255, .82) !important;
	font-weight: 900;
}

.gre-concept-map {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	margin: 24px 0 0;
}

.gre-concept-long .gre-concept-map a,
.gre-concept-map a,
.gre-concept-map span {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-height: 38px;
	padding: 8px 16px;
	border: 1px solid rgba(255, 255, 255, .38);
	border-radius: 999px;
	background: rgba(255, 255, 255, .14);
	font-weight: 800;
	color: #fff !important;
	text-decoration: none !important;
	box-shadow: inset 0 1px 0 rgba(255, 255, 255, .18);
	transition: background .16s ease, border-color .16s ease, transform .16s ease;
}

.gre-concept-long .gre-concept-map a:hover,
.gre-concept-long .gre-concept-map a:focus,
.gre-concept-map a:hover,
.gre-concept-map a:focus {
	background: rgba(255, 255, 255, .24);
	border-color: rgba(255, 255, 255, .7);
	color: #fff !important;
	text-decoration: none !important;
	transform: translateY(-1px);
	outline: none;
}

.gre-concept-section {
	margin-top: 22px;
	padding: 24px;
	border: 1px solid #e7d8ff;
	border-radius: 8px;
	background: #fff;
	box-shadow: 0 12px 28px rgba(48, 16, 79, .07);
	scroll-margin-top: 120px;
}

.gre-concept-grid {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 16px;
}

.gre-concept-card {
	padding: 18px;
	border: 1px solid #eadfff;
	border-radius: 8px;
	background: #fbfdff;
}

.gre-concept-card.is-warm {
	background: #fffaf0;
	border-color: #fed7aa;
}

.gre-concept-card.is-cool {
	background: #f0fdfa;
	border-color: #99f6e4;
}

.gre-concept-card.is-alert {
	background: #fff1f2;
	border-color: #fecdd3;
}

.gre-concept-card.is-note {
	background: var(--gre-brand-soft);
	border-color: var(--gre-brand-border);
}

.gre-concept-list {
	margin: 8px 0 0;
	padding-left: 22px;
	color: #334155;
}

.gre-concept-list li {
	margin: 8px 0;
}

.gre-concept-table {
	width: 100%;
	border-collapse: collapse;
	margin: 12px 0;
}

.gre-concept-table th,
.gre-concept-table td {
	padding: 10px;
	border: 1px solid #dfe7f2;
	text-align: left;
	vertical-align: top;
}

.gre-concept-table th {
	background: var(--gre-brand-soft);
	color: var(--gre-brand-deep);
	font-weight: 900;
}

.gre-concept-table td {
	color: #334155;
}

.gre-concept-formula,
.gre-concept-example,
.gre-concept-note,
.gre-concept-tip,
.gre-concept-remark,
.gre-concept-warning {
	margin: 12px 0;
	padding: 14px 16px;
	border-radius: 8px;
	background: #f8fafc;
	border-left: 6px solid var(--gre-brand);
	color: #243447;
}

.gre-concept-formula {
	background: #fbf7ff;
	border-left-color: var(--gre-brand);
	color: var(--gre-brand-deep);
	font-weight: 800;
}

.gre-concept-example {
	background: #ecfdf5;
	border-left-color: #10b981;
}

.gre-concept-note {
	background: var(--gre-brand-soft);
	border-left-color: var(--gre-brand);
}

.gre-concept-tip {
	background: #f5f3ff;
	border-left-color: var(--gre-brand);
}

.gre-concept-remark {
	background: #fefce8;
	border-left-color: #ca8a04;
}

.gre-concept-warning {
	background: #fff1f2;
	border-left-color: #e11d48;
}

.gre-concept-badge {
	display: inline-flex;
	align-items: center;
	min-height: 28px;
	padding: 4px 10px;
	border-radius: 999px;
	background: var(--gre-brand-soft);
	color: var(--gre-brand-dark);
	font-size: 12px;
	font-weight: 900;
	text-transform: uppercase;
	letter-spacing: .06em;
}

.gre-concept-steps {
	counter-reset: step;
	display: grid;
	gap: 12px;
	margin-top: 10px;
}

.gre-concept-step {
	position: relative;
	padding: 14px 16px 14px 54px;
	border: 1px solid #e3e9f3;
	border-radius: 8px;
	background: #fff;
}

.gre-concept-step::before {
	counter-increment: step;
	content: counter(step);
	position: absolute;
	left: 14px;
	top: 14px;
	width: 28px;
	height: 28px;
	border-radius: 8px;
	display: grid;
	place-items: center;
	background: var(--gre-brand);
	color: #fff;
	font-weight: 900;
}

.gre-concept-two-col {
	columns: 2;
	column-gap: 28px;
}

.gre-concept-two-col li {
	break-inside: avoid;
}

.gre-concept-mini-title {
	font-weight: 900;
	color: #0f172a;
}

.gre-concept-latex {
	font-family: inherit;
	font-weight: 700;
	color: #111827;
}

.gre-concept-formula-line {
	display: block;
	margin-top: 6px;
	font-weight: 900;
	color: var(--gre-brand-deep);
}

.gre-concept-footer {
	margin-top: 22px;
	padding: 22px;
	border-radius: 8px;
	background: var(--gre-brand-deep);
	color: #fff;
}

.gre-concept-footer p,
.gre-concept-footer li {
	color: #dbeafe;
}

.gre-concept-footer h2 {
	color: #fff;
}

.gre-topic1 .gre-concept-hero {
	background: linear-gradient(135deg, #8222ee 0%, #741bd8 56%, #5f14b7 100%) !important;
}

.gre-topic2 .gre-concept-hero {
	background: linear-gradient(135deg, #8222ee 0%, #741bd8 56%, #5f14b7 100%) !important;
}

@media (max-width: 860px) {
	.gre-concept-long {
		padding: 18px;
	}

	.gre-concept-grid {
		grid-template-columns: 1fr;
	}

	.gre-concept-map {
		display: flex;
	}

	.gre-concept-two-col {
		columns: 1;
	}

	.gre-concept-long h1 {
		font-size: 30px;
	}

	.gre-concept-section {
		padding: 18px;
	}
}