.mks-gre-course-content {
	--mks-ccb-bg: #0f172a;
	--mks-ccb-text: #ffffff;
	--mks-ccb-muted: #cbd5e1;
	--mks-ccb-accent: #8b5cf6;
	--mks-ccb-border: #1e293b;
	--mks-ccb-btn-bg: #8b5cf6;
	--mks-ccb-btn-text: #ffffff;
	--mks-ccb-btn-alt-bg: #ffffff;
	--mks-ccb-btn-alt-text: #0f172a;
	--mks-ccb-btn-alt-border: #cbd5e1;
	--mks-ccb-padding: 28px;
	--mks-ccb-radius: 24px;
	--mks-ccb-gap: 20px;
	--mks-ccb-preview-height: 640px;
	--mks-ccb-title-size: 32px;
	--mks-ccb-body-size: 16px;
	--mks-ccb-align: left;
	--mks-ccb-actions-justify: flex-start;
	--mks-ccb-content-align: flex-start;
	--mks-ccb-info-width: 20%;
	display: grid;
	grid-template-columns: minmax(220px, var(--mks-ccb-info-width)) minmax(0, calc(100% - var(--mks-ccb-info-width)));
	gap: var(--mks-ccb-gap);
	align-items: stretch;
	padding: var(--mks-ccb-padding);
	margin: 24px 0;
	border: 1px solid var(--mks-ccb-border);
	border-radius: var(--mks-ccb-radius);
	background: var(--mks-ccb-bg);
	color: var(--mks-ccb-text);
	box-shadow: 0 18px 45px rgba(15, 23, 42, 0.12);
	overflow: hidden;
}

.mks-gre-course-content--no-preview {
	grid-template-columns: minmax(0, 1fr);
}

.mks-gre-course-content--hide-info {
	grid-template-columns: minmax(0, 1fr);
}

.mks-gre-course-content__content {
	display: flex;
	flex-direction: column;
	align-items: var(--mks-ccb-content-align);
	justify-content: center;
	min-width: 0;
	padding-right: 6px;
	text-align: var(--mks-ccb-align);
}

.mks-gre-course-content__eyebrow {
	margin: 0 0 12px;
	font-size: 12px;
	font-weight: 800;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--mks-ccb-accent);
}

.mks-gre-course-content__title {
	margin: 0;
	font-size: var(--mks-ccb-title-size);
	line-height: 1.08;
	font-weight: 800;
	color: var(--mks-ccb-text);
}

.mks-gre-course-content__description {
	width: 100%;
	margin-top: 14px;
	font-size: var(--mks-ccb-body-size);
	line-height: 1.7;
	color: var(--mks-ccb-muted);
}

.mks-gre-course-content__description p {
	margin: 0 0 10px;
}

.mks-gre-course-content__description p:last-child {
	margin-bottom: 0;
}

.mks-gre-course-content__actions {
	display: flex;
	flex-wrap: wrap;
	gap: 12px;
	width: 100%;
	margin-top: 18px;
	justify-content: var(--mks-ccb-actions-justify);
}

.mks-gre-course-content__button {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-height: 44px;
	padding: 11px 18px;
	border-radius: 999px;
	border: 1px solid transparent;
	font-size: 14px;
	font-weight: 700;
	line-height: 1;
	text-decoration: none;
	transition: transform 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease, color 0.18s ease;
}

.mks-gre-course-content__button:hover {
	transform: translateY(-1px);
	box-shadow: 0 10px 24px rgba(15, 23, 42, 0.14);
}

.mks-gre-course-content__button--primary {
	background: var(--mks-ccb-btn-bg);
	color: var(--mks-ccb-btn-text);
}

.mks-gre-course-content__button--secondary {
	background: var(--mks-ccb-btn-alt-bg);
	color: var(--mks-ccb-btn-alt-text);
	border-color: var(--mks-ccb-btn-alt-border);
}

.mks-gre-course-content__viewer {
	display: grid;
	grid-template-rows: auto minmax(0, 1fr);
	gap: 8px;
	min-width: 0;
}

.mks-gre-course-content__toolbar {
	display: flex;
	align-items: center;
	justify-content: flex-end;
	gap: 10px;
	padding: 8px 12px;
	border: 1px solid rgba(15, 23, 42, 0.08);
	border-radius: 14px;
	background: rgba(255, 255, 255, 0.9);
	backdrop-filter: blur(8px);
}

.mks-gre-course-content__toolbar-group {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 8px;
}

.mks-gre-course-content__footer-nav {
	display: flex;
	justify-content: center;
	padding: 4px 0 0;
}

.mks-gre-course-content__footer-nav .mks-gre-course-content__toolbar-group {
	padding: 8px 12px;
	border: 1px solid rgba(15, 23, 42, 0.08);
	border-radius: 14px;
	background: rgba(255, 255, 255, 0.9);
	backdrop-filter: blur(8px);
}

.mks-gre-course-content__tool-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-height: 36px;
	padding: 8px 12px;
	border: 1px solid rgba(15, 23, 42, 0.12);
	border-radius: 10px;
	background: #ffffff;
	color: #0f172a;
	font-size: 12px;
	font-weight: 700;
	line-height: 1;
	cursor: pointer;
}

.mks-gre-course-content__tool-btn.is-active {
	background: var(--mks-ccb-accent);
	border-color: var(--mks-ccb-accent);
	color: #ffffff;
}

.mks-gre-course-content__page-label {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	padding: 0 10px;
	min-height: 36px;
	border: 1px solid rgba(15, 23, 42, 0.12);
	border-radius: 10px;
	background: #ffffff;
	color: #0f172a;
	font-size: 12px;
	font-weight: 700;
}

.mks-gre-course-content__page-label input {
	width: 68px;
	border: 0;
	background: transparent;
	color: #0f172a;
	font-size: 13px;
	font-weight: 700;
	text-align: center;
	box-shadow: none;
}

.mks-gre-course-content__page-label input:focus {
	outline: none;
}

.mks-gre-course-content__color-swatch {
	width: 24px;
	height: 24px;
	padding: 0;
	border: 2px solid transparent;
	border-radius: 999px;
	background: var(--mks-ccb-swatch, #ef4444);
	cursor: pointer;
}

.mks-gre-course-content__color-swatch.is-active {
	border-color: #0f172a;
	box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.9);
}

.mks-gre-course-content__preview {
	position: relative;
	min-width: 0;
	min-height: var(--mks-ccb-preview-height);
	border-radius: calc(var(--mks-ccb-radius) - 8px);
	overflow: hidden;
	border: 1px solid rgba(15, 23, 42, 0.08);
	background: rgba(255, 255, 255, 0.8);
}

.mks-gre-course-content__preview iframe,
.mks-gre-course-content__preview img,
.mks-gre-course-content__placeholder,
.mks-gre-course-content__draw-layer {
	display: block;
	width: 100%;
	height: var(--mks-ccb-preview-height);
}

.mks-gre-course-content__preview img {
	object-fit: cover;
}

.mks-gre-course-content__preview.is-loading::after {
	content: 'Loading slide...';
	position: absolute;
	top: 12px;
	right: 12px;
	z-index: 2;
	padding: 6px 10px;
	border-radius: 999px;
	background: rgba(15, 23, 42, 0.76);
	color: #ffffff;
	font-size: 12px;
	font-weight: 800;
	line-height: 1;
	letter-spacing: 0.04em;
	pointer-events: none;
}

.mks-gre-course-content--slide .mks-gre-course-content__preview img {
	object-fit: contain;
	background: #ffffff;
	transition: opacity 0.16s ease;
	will-change: opacity;
}

.mks-gre-course-content--slide .mks-gre-course-content__preview.is-loading img {
	opacity: 0.88;
}

.mks-gre-course-content__placeholder {
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 18px;
	text-align: center;
	font-size: 15px;
	font-weight: 600;
	line-height: 1.5;
	color: var(--mks-ccb-muted);
	background:
		linear-gradient(135deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0)),
		repeating-linear-gradient(135deg, rgba(15, 23, 42, 0.04) 0, rgba(15, 23, 42, 0.04) 12px, transparent 12px, transparent 24px);
}

.mks-gre-course-content__draw-layer {
	position: absolute;
	inset: 0;
	z-index: 3;
	pointer-events: none;
}

.mks-gre-course-content__youtube-guard {
	position: absolute;
	z-index: 4;
	background: transparent;
}

.mks-gre-course-content__youtube-guard--top-left {
	top: 10px;
	left: 12px;
	width: min(360px, 36%);
	height: 76px;
	background: transparent;
	pointer-events: auto;
}

.mks-gre-course-content__youtube-guard--bottom-left {
	left: 0;
	right: 0;
	bottom: 0;
	width: auto;
	height: 90px;
	display: flex;
	align-items: flex-end;
	padding: 14px 190px 12px 18px;
	background: linear-gradient(180deg, rgba(3, 7, 18, 0) 0%, rgba(3, 7, 18, 0.78) 44%, rgba(3, 7, 18, 0.96) 100%);
	pointer-events: auto;
}

.mks-gre-course-content__youtube-guard--bottom-right {
	right: 0;
	bottom: 0;
	width: 168px;
	height: 90px;
	pointer-events: auto;
}

.mks-gre-course-content__youtube-guard--bottom-right-brand {
	right: 12px;
	bottom: 28px;
	width: 136px;
	height: 58px;
	padding: 6px 10px;
	display: flex;
	align-items: center;
	justify-content: center;
	border-radius: 14px;
	background: linear-gradient(180deg, rgba(0, 0, 0, 0.88) 0%, rgba(0, 0, 0, 0.96) 100%);
	box-shadow: 0 10px 24px rgba(0, 0, 0, 0.24);
	pointer-events: none;
}

.mks-gre-course-content__youtube-guard-text {
	display: flex;
	flex-direction: column;
	align-items: flex-start;
	gap: 2px;
	color: #ffffff;
}

.mks-gre-course-content__youtube-guard-text strong {
	font-size: clamp(14px, 1.3vw, 18px);
	font-weight: 900;
	line-height: 1;
	letter-spacing: 0.03em;
}

.mks-gre-course-content__youtube-guard-text span {
	font-size: clamp(8px, 0.8vw, 11px);
	font-weight: 700;
	line-height: 1.1;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: rgba(255, 255, 255, 0.76);
}

.mks-gre-course-content__youtube-guard-logo {
	display: block;
	max-width: 100%;
	max-height: 100%;
	width: auto;
	height: auto;
	object-fit: contain;
}

.mks-gre-course-content__youtube-progress {
	position: absolute;
	left: clamp(248px, 18vw, 310px);
	right: 186px;
	bottom: 18px;
	z-index: 6;
	display: flex;
	align-items: center;
	gap: 10px;
	padding: 0;
	background: transparent;
}

.mks-gre-course-content__youtube-progress[hidden] {
	display: none;
}

.mks-gre-course-content__youtube-time {
	flex: 0 0 auto;
	min-width: 42px;
	font-size: 12px;
	font-weight: 800;
	line-height: 1;
	letter-spacing: 0.04em;
	color: rgba(255, 255, 255, 0.92);
	font-variant-numeric: tabular-nums;
	text-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.mks-gre-course-content__youtube-time--duration {
	text-align: right;
	color: rgba(255, 255, 255, 0.78);
}

.mks-gre-course-content__youtube-seek {
	flex: 1 1 auto;
	width: 100%;
	margin: 0;
	accent-color: #ff355d;
	cursor: pointer;
	filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.22));
}

.mks-gre-course-content.is-drawing-enabled .mks-gre-course-content__draw-layer {
	pointer-events: auto;
	cursor: crosshair;
}

.mks-gre-course-content.is-drawing-enabled .mks-gre-course-content__preview iframe,
.mks-gre-course-content.is-drawing-enabled .mks-gre-course-content__youtube-progress {
	pointer-events: none;
	opacity: 0.48;
}

.mks-gre-course-content__provider-shield {
	position: absolute;
	left: 0;
	right: 0;
	bottom: 0;
	height: 78px;
	z-index: 5;
	pointer-events: auto;
	background: linear-gradient(180deg, rgba(255, 255, 255, 0) 0%, rgba(248, 250, 252, 0.96) 58%, rgba(248, 250, 252, 1) 100%);
}

.mks-gre-course-content--slide .mks-gre-course-content__provider-shield {
	height: 64px;
	background: transparent;
}

.mks-gre-course-content--pdf .mks-gre-course-content__toolbar,
.mks-gre-course-content--slide .mks-gre-course-content__toolbar {
	position: sticky;
	top: 0;
	z-index: 4;
}

.mks-gre-course-content--pdf {
	grid-template-columns: minmax(0, 1fr);
	align-items: start;
	box-shadow: 0 10px 26px rgba(15, 23, 42, 0.08);
}

.mks-gre-course-content--pdf .mks-gre-course-content__pdf-head {
	display: grid;
	grid-template-columns: minmax(0, 1fr);
	gap: 12px;
	align-items: start;
}

.mks-gre-course-content--pdf .mks-gre-course-content__pdf-copy {
	min-width: 0;
}

.mks-gre-course-content--pdf .mks-gre-course-content__description {
	margin-top: 10px;
}

.mks-gre-course-content--pdf .mks-gre-course-content__actions--pdf {
	margin-top: 0;
}

.mks-gre-course-content--pdf .mks-gre-course-content__viewer {
	gap: 10px;
}

.mks-gre-course-content--pdf .mks-gre-course-content__toolbar {
	padding: 6px 10px;
	border: 1px solid #e2e8f0;
	border-radius: 12px;
	background: #f8fafc;
	backdrop-filter: none;
}

.mks-gre-course-content--pdf .mks-gre-course-content__toolbar-group {
	gap: 6px;
}

.mks-gre-course-content--pdf .mks-gre-course-content__tool-btn,
.mks-gre-course-content--pdf .mks-gre-course-content__page-label {
	min-height: 34px;
	padding-top: 7px;
	padding-bottom: 7px;
}

.mks-gre-course-content--pdf .mks-gre-course-content__preview {
	border-radius: 14px;
	box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.2);
}

.mks-gre-course-content--slide {
	grid-template-columns: minmax(0, 1fr);
	align-items: start;
	box-shadow: 0 10px 26px rgba(15, 23, 42, 0.08);
}

.mks-gre-course-content--slide .mks-gre-course-content__slide-head {
	display: grid;
	grid-template-columns: minmax(0, 1fr);
	gap: 12px;
	align-items: start;
}

.mks-gre-course-content--slide .mks-gre-course-content__slide-copy {
	min-width: 0;
}

.mks-gre-course-content--slide .mks-gre-course-content__slide-bar {
	display: grid;
	grid-template-columns: auto minmax(0, 1fr) auto;
	align-items: center;
	gap: 10px;
	padding: 8px 12px;
	border: 1px solid #e2e8f0;
	border-radius: 14px;
	background: #f8fafc;
}

.mks-gre-course-content--slide .mks-gre-course-content__slide-bar-group {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	flex-wrap: wrap;
}

.mks-gre-course-content--slide .mks-gre-course-content__slide-bar-group--right {
	justify-content: flex-end;
}

.mks-gre-course-content--slide .mks-gre-course-content__slide-bar-copy {
	min-width: 0;
	text-align: center;
}

.mks-gre-course-content--slide .mks-gre-course-content__slide-bar-eyebrow {
	margin: 0 0 2px;
	font-size: 10px;
	font-weight: 800;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--mks-ccb-accent);
}

.mks-gre-course-content--slide .mks-gre-course-content__slide-bar-title {
	margin: 0;
	font-size: clamp(16px, 1.5vw, 22px);
	line-height: 1.15;
	font-weight: 700;
	color: var(--mks-ccb-text);
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
}

.mks-gre-course-content--slide .mks-gre-course-content__slide-meta {
	display: grid;
	gap: 10px;
}

.mks-gre-course-content--slide .mks-gre-course-content__description {
	margin-top: 0;
}

.mks-gre-course-content--slide .mks-gre-course-content__actions--slide {
	margin-top: 0;
}

.mks-gre-course-content--slide .mks-gre-course-content__viewer {
	gap: 8px;
}

.mks-gre-course-content--slide .mks-gre-course-content__toolbar,
.mks-gre-course-content--slide .mks-gre-course-content__footer-nav .mks-gre-course-content__toolbar-group {
	border: 1px solid #e2e8f0;
	border-radius: 12px;
	background: #f8fafc;
	backdrop-filter: none;
}

.mks-gre-course-content--slide .mks-gre-course-content__toolbar {
	padding: 6px 10px;
}

.mks-gre-course-content--slide .mks-gre-course-content__toolbar-group {
	gap: 6px;
}

.mks-gre-course-content--slide .mks-gre-course-content__tool-btn,
.mks-gre-course-content--slide .mks-gre-course-content__page-label {
	min-height: 32px;
	padding-top: 6px;
	padding-bottom: 6px;
}

.mks-gre-course-content--slide .mks-gre-course-content__preview {
	border-radius: 14px;
	box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.2);
}

@media (max-width: 1000px) {
	.mks-gre-course-content {
		grid-template-columns: minmax(0, 1fr);
	}

	.mks-gre-course-content__viewer {
		order: -1;
	}

	.mks-gre-course-content--slide .mks-gre-course-content__slide-head {
		gap: 10px;
	}

	.mks-gre-course-content--slide .mks-gre-course-content__slide-bar {
		grid-template-columns: 1fr;
		justify-items: stretch;
	}

	.mks-gre-course-content--slide .mks-gre-course-content__slide-bar-copy {
		order: -1;
		text-align: left;
	}

	.mks-gre-course-content--slide .mks-gre-course-content__slide-bar-group--right {
		justify-content: flex-start;
	}
}

@media (max-width: 640px) {
	.mks-gre-course-content {
		padding: 18px;
		gap: 16px;
	}

	.mks-gre-course-content__title {
		font-size: clamp(24px, 6vw, var(--mks-ccb-title-size));
	}

	.mks-gre-course-content__toolbar {
		flex-direction: column;
		align-items: stretch;
	}

	.mks-gre-course-content__toolbar-group {
		justify-content: center;
	}

	.mks-gre-course-content__footer-nav .mks-gre-course-content__toolbar-group {
		width: 100%;
		justify-content: center;
	}

	.mks-gre-course-content--pdf .mks-gre-course-content__pdf-head {
		gap: 10px;
	}

	.mks-gre-course-content__button {
		width: 100%;
	}

	.mks-gre-course-content__actions {
		gap: 10px;
	}

	.mks-gre-course-content__youtube-guard--top-left {
		width: min(220px, 58%);
		height: 72px;
	}

	.mks-gre-course-content__youtube-guard--bottom-left {
		height: 72px;
		padding: 12px 110px 10px 12px;
	}

	.mks-gre-course-content__youtube-guard--bottom-right {
		width: 104px;
		height: 72px;
	}

	.mks-gre-course-content__youtube-guard--bottom-right-brand {
		right: 8px;
		bottom: 22px;
		width: 104px;
		height: 46px;
		padding: 4px 8px;
		border-radius: 10px;
	}

	.mks-gre-course-content__youtube-progress {
		left: 128px;
		right: 118px;
		bottom: 14px;
		gap: 8px;
	}

	.mks-gre-course-content__youtube-time {
		min-width: 34px;
		font-size: 11px;
	}
}