/**
 * Homepage courses section
 */

.hg-courses {
	--courses-font-headline: "Plus Jakarta Sans", sans-serif;
	--courses-font-text: "DM Sans", sans-serif;
	--courses-font-body-size: 1rem;
	--courses-surface: #f4f6f8;
	padding: clamp(4rem, 7vw, 5rem) 0;
	background: var(--courses-surface);
}

.hg-courses__inner {
	width: 100%;
	max-width: var(--content-max);
	margin-inline: auto;
	padding-inline: var(--section-padding-x);
}

.hg-courses__header {
	max-width: 40rem;
	margin: 0 0 clamp(2.5rem, 5vw, 3.5rem);
	text-align: left;
}

.hg-courses__label {
	margin: 0 0 0.875rem;
}

.hg-courses__label-text {
	display: inline-block;
	position: relative;
	padding-bottom: 0.3rem;
	font-family: var(--courses-font-text);
	font-size: 0.6875rem;
	font-weight: 700;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--foreground);
}

.hg-courses__label-text::after {
	content: "";
	position: absolute;
	left: 0;
	bottom: 0;
	width: 100%;
	height: 0.3rem;
	background: color-mix(in srgb, var(--accent) 50%, transparent);
	z-index: -1;
}

.hg-courses__title {
	margin: 0 0 1rem;
	font-family: var(--courses-font-headline);
	font-size: clamp(1.375rem, 2.75vw, 2.125rem);
	font-weight: 700;
	line-height: 1.2;
	letter-spacing: -0.035em;
	color: var(--foreground);
}

.hg-courses__intro {
	margin: 0;
	font-family: var(--courses-font-text);
	font-size: var(--courses-font-body-size);
	line-height: 1.75;
	color: var(--muted-foreground);
}

/* Card stack */
.hg-courses__stack {
	display: grid;
	gap: 1.25rem;
}

.hg-courses.has-sticky-cards .hg-courses__stack {
	display: flex;
	flex-direction: column;
	gap: 1.5rem;
	padding-bottom: clamp(6rem, 18vh, 10rem);
}

.hg-course-card {
	display: grid;
	grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
	align-items: stretch;
	overflow: hidden;
	border: 1px solid var(--border);
	border-radius: 1rem;
	background: #ffffff;
	box-shadow: 0 1px 2px rgb(0 0 0 / 4%);
}

.hg-courses.has-sticky-cards .hg-course-card {
	position: sticky;
	z-index: 1;
	will-change: transform, opacity, box-shadow;
	transition:
		transform 0.55s cubic-bezier(0.22, 1, 0.36, 1),
		opacity 0.55s ease,
		box-shadow 0.55s ease;
}

.hg-courses.has-sticky-cards .hg-course-card:nth-child(1) {
	top: calc(var(--hg-chrome-height) + 1.25rem);
}

.hg-courses.has-sticky-cards .hg-course-card:nth-child(2) {
	top: calc(var(--hg-chrome-height) + 2.75rem);
	z-index: 2;
}

.hg-courses.has-sticky-cards .hg-course-card:nth-child(3) {
	top: calc(var(--hg-chrome-height) + 4.25rem);
	z-index: 3;
}

.hg-courses.has-sticky-cards .hg-course-card.is-past {
	transform: scale(0.94) translateY(-0.75rem);
	opacity: 0.72;
	box-shadow: 0 1px 2px rgb(0 0 0 / 3%);
}

.hg-courses.has-sticky-cards .hg-course-card.is-active {
	transform: scale(1);
	opacity: 1;
	box-shadow: 0 16px 40px rgb(0 0 0 / 10%);
}

.hg-course-card__content {
	display: flex;
	flex-direction: column;
	justify-content: center;
	padding: clamp(1.5rem, 3vw, 2.25rem);
}

.hg-course-card__eyebrow {
	margin: 0 0 0.625rem;
	font-family: var(--courses-font-text);
	font-size: 0.6875rem;
	font-weight: 700;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--muted-foreground);
}

.hg-course-card__title {
	margin: 0 0 0.75rem;
	font-family: var(--courses-font-headline);
	font-size: clamp(1.125rem, 2vw, 1.5rem);
	font-weight: 700;
	line-height: 1.25;
	letter-spacing: -0.025em;
	color: var(--foreground);
}

.hg-course-card__desc {
	margin: 0 0 1.25rem;
	font-family: var(--courses-font-text);
	font-size: var(--courses-font-body-size);
	line-height: 1.7;
	color: var(--muted-foreground);
}

.hg-course-card__features {
	list-style: none;
	margin: 0 0 1.5rem;
	padding: 0;
	display: grid;
	gap: 0.625rem;
}

.hg-course-card__feature {
	display: flex;
	align-items: flex-start;
	gap: 0.625rem;
	font-family: var(--courses-font-text);
	font-size: 0.9375rem;
	line-height: 1.5;
	color: var(--foreground);
}

.hg-course-card__check {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	flex-shrink: 0;
	width: 1.25rem;
	height: 1.25rem;
	margin-top: 0.125rem;
	border-radius: 50%;
	background: color-mix(in srgb, var(--accent) 35%, #ffffff);
	color: var(--foreground);
	font-size: 0.5625rem;
}

.hg-course-card__btn {
	display: inline-flex;
	align-items: center;
	gap: 0.625rem;
	align-self: flex-start;
	min-height: 2.625rem;
	padding: 0 1.25rem 0 0.375rem;
	font-family: var(--courses-font-text);
	font-size: 0.8125rem;
	font-weight: 600;
	text-decoration: none;
	color: #ffffff;
	background: var(--foreground);
	border: 1px solid var(--foreground);
	border-radius: 0.375rem;
	transition:
		background-color 0.25s ease,
		border-color 0.25s ease,
		transform 0.25s cubic-bezier(0.22, 1, 0.36, 1),
		box-shadow 0.25s ease,
		gap 0.25s ease;
}

.hg-course-card__btn-icon {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 1.75rem;
	height: 1.75rem;
	border-radius: 0.25rem;
	background: var(--accent);
	color: var(--foreground);
	font-size: 0.6875rem;
	transition: transform 0.25s ease;
}

.hg-course-card__btn:hover {
	background: color-mix(in srgb, var(--foreground) 90%, var(--accent));
	border-color: color-mix(in srgb, var(--foreground) 90%, var(--accent));
	transform: translateY(-2px);
	box-shadow: 0 8px 20px rgb(0 0 0 / 12%);
	gap: 0.875rem;
}

.hg-course-card__btn:hover .hg-course-card__btn-icon {
	transform: translateX(2px);
}

.hg-course-card__btn:active {
	transform: translateY(0);
}

.hg-course-card__visual {
	position: relative;
	min-height: 16rem;
	overflow: hidden;
	background: #0f172a;
}

.hg-course-card__image {
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.hg-course-card__placeholder {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 100%;
	height: 100%;
	min-height: inherit;
	background: linear-gradient(
		145deg,
		color-mix(in srgb, var(--foreground) 88%, #1e293b) 0%,
		#0f172a 55%,
		color-mix(in srgb, var(--accent) 25%, #0f172a) 100%
	);
	color: color-mix(in srgb, var(--accent) 70%, #ffffff);
	font-size: 2.5rem;
}

.hg-course-card__visual::after {
	content: "";
	position: absolute;
	inset: 0;
	background: linear-gradient(180deg, transparent 40%, rgb(0 0 0 / 18%) 100%);
	pointer-events: none;
}

/* Scroll reveal */
.hg-courses__header.hg-reveal {
	opacity: 0;
	transform: translateY(24px);
	transition:
		opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1),
		transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
}

.hg-courses__header.hg-reveal.is-visible {
	opacity: 1;
	transform: translateY(0);
}

.hg-course-card--animate {
	opacity: 0;
	transform: translateY(3rem) translateX(-1.25rem);
	transition:
		opacity 0.75s cubic-bezier(0.22, 1, 0.36, 1),
		transform 0.75s cubic-bezier(0.22, 1, 0.36, 1),
		box-shadow 0.55s ease;
}

.hg-course-card--animate.is-visible {
	opacity: 1;
	transform: translateY(0) translateX(0);
}

.hg-course-card--animate.is-visible .hg-course-card__content {
	animation: hg-course-content-in 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.12s both;
}

.hg-course-card--animate.is-visible .hg-course-card__visual {
	animation: hg-course-visual-in 0.85s cubic-bezier(0.22, 1, 0.36, 1) 0.2s both;
}

.hg-courses.has-sticky-cards .hg-course-card--animate.is-visible {
	transform: translateY(0) translateX(0);
}

.hg-courses.has-sticky-cards .hg-course-card--animate.is-visible.is-past {
	transform: scale(0.94) translateY(-0.75rem);
}

.hg-courses.has-sticky-cards .hg-course-card--animate.is-visible.is-active {
	transform: scale(1) translateY(0);
}

@keyframes hg-course-content-in {
	from {
		opacity: 0;
		transform: translateX(-1rem);
	}

	to {
		opacity: 1;
		transform: translateX(0);
	}
}

@keyframes hg-course-visual-in {
	from {
		opacity: 0;
		transform: scale(1.06);
	}

	to {
		opacity: 1;
		transform: scale(1);
	}
}

@media (max-width: 960px) {
	.hg-course-card {
		grid-template-columns: 1fr;
	}

	.hg-course-card__visual {
		order: -1;
		min-height: 12rem;
	}

	.hg-course-card__content {
		padding: 1.5rem;
	}
}

@media (prefers-reduced-motion: reduce) {
	.hg-courses__header.hg-reveal,
	.hg-course-card--animate {
		opacity: 1;
		transform: none;
		transition: none;
	}

	.hg-course-card--animate.is-visible .hg-course-card__content,
	.hg-course-card--animate.is-visible .hg-course-card__visual {
		animation: none;
	}

	.hg-courses.has-sticky-cards .hg-course-card {
		position: static;
		transform: none !important;
		opacity: 1 !important;
	}

	.hg-course-card__btn,
	.hg-course-card__btn-icon {
		transition: none;
	}

	.hg-course-card__btn:hover {
		transform: none;
	}

	.hg-course-card__btn:hover .hg-course-card__btn-icon {
		transform: none;
	}
}