/**
 * Enhanced curriculum styling.
 *
 * @package CookingB
 */

.cb-course-curriculum {
	display: flex;
	flex-direction: column;
	gap: var(--space-3);
}

/* Chapter styling */
.cb-course-chapter {
	background: var(--color-bg-elevated);
	border-radius: var(--radius-md);
	overflow: hidden;
	border: 1px solid var(--color-border);
	transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.cb-course-chapter:hover {
	border-color: var(--color-primary);
	box-shadow: var(--shadow-sm);
	transform: translateY(-1px);
}

.cb-course-chapter[open] {
	border-color: var(--color-primary);
	box-shadow: var(--shadow-md);
}

/* Chapter header */
.cb-course-chapter__head {
	padding: var(--space-4);
	display: flex;
	justify-content: space-between;
	align-items: center;
	cursor: pointer;
	user-select: none;
	list-style: none;
	transition: background 0.3s cubic-bezier(0.4, 0, 0.2, 1);
	position: relative;
	z-index: 2;
}

.cb-course-chapter__head:hover {
	background: var(--color-primary-light-rgba);
}

.cb-course-chapter__head::-webkit-details-marker {
	display: none;
}

.cb-course-chapter__title {
	display: flex;
	align-items: center;
	gap: var(--space-3);
	font-weight: 600;
	color: var(--color-text);
	flex: 1;
	transition: color 0.3s ease;
}

.cb-course-chapter__head:hover .cb-course-chapter__title {
	color: var(--color-primary);
}

.cb-course-chapter__number {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 36px;
	height: 36px;
	background: var(--color-primary-light-rgba);
	color: var(--color-primary);
	border-radius: var(--radius-md);
	font-size: var(--text-sm);
	font-weight: 700;
	transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.cb-course-chapter:hover .cb-course-chapter__number {
	background: var(--color-primary);
	color: var(--color-text-inverse);
	transform: scale(1.05);
}

.cb-course-chapter__meta {
	display: flex;
	align-items: center;
	gap: var(--space-3);
	font-size: var(--text-sm);
	color: var(--color-text-muted);
	transition: color 0.3s ease;
}

.cb-course-chapter__head:hover .cb-course-chapter__meta {
	color: var(--color-primary);
}

/* Chapter toggle arrow */
.cb-course-chapter__toggle {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 28px;
	height: 28px;
	border-radius: var(--radius-md);
	transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.cb-course-chapter[open] .cb-course-chapter__toggle {
	transform: rotate(180deg);
}

/* Lessons list with smooth animation */
.cb-course-lessons {
	list-style: none;
	padding: 0;
	margin: 0;
	border-top: 1px solid var(--color-border);
	max-height: 0;
	overflow: hidden;
	opacity: 0;
	transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease, padding 0.3s ease;
}

.cb-course-chapter[open] .cb-course-lessons {
	max-height: 2000px;
	opacity: 1;
	padding-bottom: 0;
}

.cb-course-lessons li {
	display: flex;
	align-items: center;
	gap: var(--space-3);
	padding: var(--space-4);
	border-bottom: 1px solid var(--color-border);
	color: var(--color-text);
	font-size: var(--text-sm);
	transition:
		background 0.2s cubic-bezier(0.4, 0, 0.2, 1),
		color 0.2s ease;
}

.cb-course-lessons li:last-child {
	border-bottom: none;
}

.cb-course-lessons li:hover {
	background: var(--color-primary-light-rgba);
}

.cb-course-lessons li.is-locked {
	color: var(--color-text-soft);
	opacity: 0.65;
}

.cb-course-lessons li.is-locked:hover {
	background: var(--color-bg-muted);
}

.cb-course-lessons__number {
	flex-shrink: 0;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 28px;
	height: 28px;
	border-radius: 50%;
	background: var(--color-primary-light-rgba);
	color: var(--color-primary);
	font-size: var(--text-xs);
	font-weight: 700;
	line-height: 1;
	transition:
		background 0.2s ease,
		color 0.2s ease,
		transform 0.2s ease;
}

.cb-course-lessons li:hover .cb-course-lessons__number {
	background: var(--color-primary);
	color: var(--color-text-inverse);
}

.cb-course-lessons li.is-locked .cb-course-lessons__number {
	color: var(--color-text-soft);
	background: var(--color-bg-muted);
}

.cb-course-lessons li.is-locked:hover .cb-course-lessons__number {
	background: var(--color-border);
	color: var(--color-text-soft);
}

.cb-course-lessons__title {
	flex: 1;
	font-weight: 500;
	transition: color 0.2s ease;
}

.cb-course-lessons li:hover .cb-course-lessons__title {
	color: var(--color-primary);
}

.cb-course-lessons__dur {
	color: var(--color-text-muted);
	font-size: var(--text-xs);
	transition: color 0.2s ease;
}

.cb-course-lessons li:hover .cb-course-lessons__dur {
	color: var(--color-text);
}

/* Responsive */
@media (max-width: 767px) {
	.cb-course-chapter__head {
		padding: var(--space-3);
	}
	
	.cb-course-lessons li {
		padding: var(--space-3);
		gap: var(--space-2);
	}
	
	.cb-course-chapter__meta {
		flex-direction: column;
		align-items: flex-end;
		gap: var(--space-1);
	}
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
	.cb-course-chapter__toggle {
		transition: none;
	}
	
	.cb-course-chapter__head,
	.cb-course-chapter,
	.cb-course-lessons li,
	.cb-course-lessons {
		transition: none;
	}
	
	.cb-course-chapter:hover {
		transform: none;
	}
	
	.cb-course-lessons li:hover .cb-course-lessons__number {
		transform: none;
	}
	
	.cb-course-chapter:hover .cb-course-chapter__number {
		transform: none;
	}
}