.vkm-course-structure-preview {
	display: grid;
	gap: 1.5rem;
}

.vkm-course-structure-nav,
.vkm-course-structure-detail {
	min-width: 0;
}

.vkm-course-preview-section {
	overflow: hidden;
	border: 1px solid rgb(var(--border));
	border-radius: 1rem;
	background: rgb(var(--bg) / 0.4);
}

.vkm-course-preview-section__summary {
	padding: 0.85rem 0.95rem;
	border-bottom: 1px solid rgb(var(--border) / 0.7);
}

.vkm-course-preview-lesson {
	position: relative;
	display: grid;
	grid-template-columns: auto minmax(0, 1fr) auto;
	align-items: center;
	gap: 0.75rem;
	padding: 0.8rem 0.9rem;
	border: 1px solid rgb(var(--border));
	border-radius: 0.9rem;
	background: rgb(var(--surface) / 0.8);
	text-align: left;
	text-decoration: none;
	transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}

.vkm-course-preview-lesson__title {
	display: block;
	text-align: left;
}

.vkm-course-preview-lesson__state {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-width: 1rem;
	text-align: center;
}

.vkm-course-preview-media img {
	display: block;
	width: 100%;
	height: 100%;
	object-fit: fill;
}

.vkm-course-preview-lesson.is-loading {
	pointer-events: none;
	opacity: 0.78;
}

.vkm-course-preview-lesson.is-loading .vkm-course-preview-lesson__state {
	color: transparent;
}

.vkm-course-preview-lesson.is-loading .vkm-course-preview-lesson__state::after {
	content: '';
	display: block;
	width: 0.95rem;
	height: 0.95rem;
	border: 2px solid rgb(var(--brand) / 0.24);
	border-top-color: rgb(var(--brand));
	border-radius: 999px;
	animation: vkm-course-preview-spin 0.7s linear infinite;
}

.vkm-course-structure-detail.is-loading {
	opacity: 0.72;
}

.vkm-course-preview-detail__eyebrow {
	font-size: 0.68rem;
	font-weight: 600;
	letter-spacing: 0.2em;
	text-transform: uppercase;
	color: rgb(var(--brand));
}

.vkm-course-preview-description__label {
	font-family: "DM Serif Display", serif;
	font-size: 1.35rem;
	line-height: 1.2;
	color: rgb(var(--brand));
}

.vkm-course-preview-detail__duration {
	font-size: 0.84rem;
	line-height: 1.5;
	color: rgb(var(--text-muted));
}

.vkm-course-preview-description__body {
	color: rgb(var(--text-muted));
	font-size: 0.96rem;
	line-height: 1.85;
}

.vkm-course-preview-description__body > :first-child {
	margin-top: 0;
}

.vkm-course-preview-description__body > :last-child {
	margin-bottom: 0;
}

.vkm-course-preview-description__body p,
.vkm-course-preview-description__body ul,
.vkm-course-preview-description__body ol {
	margin: 0 0 1rem;
}

.vkm-course-preview-description__body ul,
.vkm-course-preview-description__body ol {
	padding-left: 1.25rem;
}

.vkm-course-preview-description__body h2,
.vkm-course-preview-description__body h3,
.vkm-course-preview-description__body h4 {
	margin: 1.2rem 0 0.75rem;
	font-size: 1rem;
	line-height: 1.4;
	font-weight: 600;
	color: rgb(var(--text));
}

@keyframes vkm-course-preview-spin {
	to {
		transform: rotate(360deg);
	}
}

@media (min-width: 1280px) {
	.vkm-course-structure-preview {
		grid-template-columns: minmax(0, 23rem) minmax(0, 1fr);
		align-items: start;
	}
}