/* =========================================================
   Lessons listing page
   ========================================================= */

.lessons-main {
	max-width: 1180px;
}

.lessons-heading h1 {
	font-family: "Space Grotesk", "Nunito Sans", sans-serif;
	font-size: clamp(1.75rem, 3vw, 2.25rem);
	color: var(--blue-dark);
	margin: 0 0 0.5rem;
}

.lessons-heading p {
	margin: 0;
	max-width: 40rem;
	color: var(--text-muted);
}

.lesson-grid {
	list-style: none;
	margin: 0;
	padding: 0;
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(19rem, 1fr));
	gap: 1.5rem;
}

.lesson-card {
	background: var(--card-bg);
	border: 1px solid var(--card-border);
	border-radius: var(--radius-lg);
	box-shadow: var(--shadow-sm);
	overflow: hidden;
	transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.lesson-card:hover {
	box-shadow: var(--shadow-md);
	transform: translateY(-3px);
}

.lesson-card-link {
	display: flex;
	flex-direction: column;
	height: 100%;
	color: inherit;
	text-decoration: none;
}

.lesson-card-image {
	aspect-ratio: 16 / 9;
	background: var(--blue-soft);
}

.lesson-card-image img {
	display: block;
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.lesson-card-body {
	display: flex;
	flex-direction: column;
	gap: 0.5rem;
	padding: 1.25rem;
	flex: 1 1 auto;
}

.lesson-card-tags {
	display: flex;
	flex-wrap: wrap;
	gap: 0.4rem;
}

.lesson-card-tag {
	background: var(--teal-soft);
	color: var(--teal-dark);
	border-radius: 999px;
	padding: 0.25rem 0.75rem;
	font-size: 0.75rem;
	font-weight: 700;
}

.lesson-card-title {
	margin: 0;
	font-size: 1.15rem;
	color: var(--blue-dark);
}

.lesson-card-desc {
	margin: 0;
	font-size: 0.9375rem;
	color: var(--text-muted);
	flex: 1 1 auto;
}

.lesson-card-progress {
	display: flex;
	align-items: center;
	gap: 0.65rem;
	margin-top: 0.15rem;
}

.lesson-card-progress-track {
	flex: 1 1 auto;
	height: 0.5rem;
	border-radius: 999px;
	background: var(--blue-soft);
	overflow: hidden;
}

.lesson-card-progress-fill {
	height: 100%;
	border-radius: 999px;
	background: var(--blue);
}

.lesson-card-progress-fill.is-complete {
	background: var(--teal);
}

.lesson-card-progress-label {
	flex-shrink: 0;
	font-size: 0.8125rem;
	font-weight: 600;
	color: var(--text-muted);
}

.lesson-card-cta {
	margin-top: 0.4rem;
	font-size: 0.875rem;
	font-weight: 700;
	color: var(--blue-dark);
}

.lesson-card-link:hover .lesson-card-cta,
.lesson-card-link:focus-visible .lesson-card-cta {
	color: var(--teal-dark);
}

/* ---- Loading skeleton ---- */
.lesson-card-skeleton {
	min-height: 20rem;
	background: linear-gradient(100deg, var(--card-bg) 30%, var(--blue-soft) 50%, var(--card-bg) 70%);
	background-size: 200% 100%;
	animation: lesson-skeleton-shimmer 1.4s ease-in-out infinite;
}

@keyframes lesson-skeleton-shimmer {
	from {
		background-position: 150% 0;
	}
	to {
		background-position: -50% 0;
	}
}

.lesson-grid-error {
	text-align: center;
	color: var(--text-muted);
}

@media (prefers-reduced-motion: reduce) {
	.lesson-card-skeleton {
		animation: none;
	}
}

/* ---- Mobile ---- */
@media (max-width: 560px) {
	.lesson-grid {
		grid-template-columns: 1fr;
	}
}