/**
 * Phase 6.X — Subject showcase (sticky panel + premium carousel).
 * Scoped to .nds-ssubj / [data-nds-ssubj] only.
 */

.nds-ssubj {
	--ssj-ink: #0a1218;
	--ssj-mute: #5c656e;
	--ssj-soft: #8a929a;
	--ssj-accent: #1e587a;
	--ssj-line: rgba(10, 18, 24, 0.08);
	--ssj-ease: cubic-bezier(0.22, 1, 0.36, 1);
	--ssj-wash: #f3f7fb;
	padding: 2.75rem 0;
	margin: 0;
	color: var(--ssj-ink);
	background: transparent;
}

.nds-ssubj[data-subject="medical-surgical"] {
	--ssj-accent: #1e587a;
	--ssj-wash: #f2f6fb;
}
.nds-ssubj[data-subject="pharmacology"] {
	--ssj-accent: #0b5f69;
	--ssj-wash: #f1f8f8;
}
.nds-ssubj[data-subject="pediatrics"] {
	--ssj-accent: #2a6b5a;
	--ssj-wash: #f1f8f5;
}
.nds-ssubj[data-subject="mental-health"] {
	--ssj-accent: #4a3d6b;
	--ssj-wash: #f5f3f9;
}
.nds-ssubj[data-subject="fundamentals"] {
	--ssj-accent: #6b5a3d;
	--ssj-wash: #f8f5f1;
}
.nds-ssubj[data-subject="maternity"] {
	--ssj-accent: #6b3d55;
	--ssj-wash: #f9f3f6;
}
.nds-ssubj[data-subject="pathophysiology"] {
	--ssj-accent: #3d4a6b;
	--ssj-wash: #f3f4f8;
}

.nds-ssubj__shell {
	display: grid;
	grid-template-columns: minmax(16rem, 0.9fr) minmax(0, 1.35fr);
	gap: 1.5rem 1.75rem;
	align-items: start;
	min-width: 0;
	padding: 1.35rem;
	border-radius: 28px;
	background:
		linear-gradient(180deg, #ffffff 0%, var(--ssj-wash) 55%, #ffffff 100%);
	border: 1px solid var(--ssj-line);
	box-shadow:
		0 1px 2px rgba(10, 18, 24, 0.03),
		0 18px 40px rgba(10, 18, 24, 0.05);
}

.nds-ssubj__panel {
	position: sticky;
	top: 6.5rem;
	z-index: 2;
	display: flex;
	flex-direction: column;
	gap: 0.95rem;
	min-width: 0;
	padding: 1.65rem 1.45rem 1.55rem;
	border-radius: 22px;
	background:
		linear-gradient(165deg, color-mix(in srgb, var(--ssj-accent) 8%, #fff) 0%, #ffffff 58%);
	border: 1px solid color-mix(in srgb, var(--ssj-accent) 12%, var(--ssj-line));
	overflow: hidden;
	isolation: isolate;
}

.nds-ssubj__panel-bg {
	position: absolute;
	inset: 0;
	pointer-events: none;
	z-index: 0;
	overflow: hidden;
	border-radius: inherit;
}

.nds-ssubj__glow {
	position: absolute;
	top: -20%;
	right: -12%;
	width: 58%;
	height: 55%;
	border-radius: 50%;
	background: color-mix(in srgb, var(--ssj-accent) 16%, transparent);
	filter: blur(28px);
}

.nds-ssubj__mark {
	position: absolute;
	left: 1rem;
	bottom: 1rem;
	width: 3.25rem;
	height: 3.25rem;
	color: color-mix(in srgb, var(--ssj-accent) 45%, #fff);
	opacity: 0.28;
}

.nds-ssubj__eyebrow {
	position: relative;
	z-index: 1;
	margin: 0;
	font-size: 0.68rem;
	font-weight: 750;
	letter-spacing: 0.16em;
	text-transform: uppercase;
	color: var(--ssj-accent);
}

.nds-ssubj__title {
	position: relative;
	z-index: 1;
	margin: 0;
	font-family: var(--nds-font-display);
	font-size: clamp(1.55rem, 2.2vw, 2.05rem);
	font-weight: 650;
	letter-spacing: -0.035em;
	line-height: 1.12;
	color: var(--ssj-ink);
}

.nds-ssubj__lede {
	position: relative;
	z-index: 1;
	margin: 0;
	max-width: 34ch;
	font-size: 0.98rem;
	line-height: 1.55;
	color: var(--ssj-mute);
}

.nds-ssubj__stats {
	position: relative;
	z-index: 1;
	display: flex;
	flex-direction: column;
	gap: 0.55rem;
	margin: 0.25rem 0 0;
	padding: 0;
	list-style: none;
}

.nds-ssubj__stats li {
	display: flex;
	align-items: center;
	gap: 0.55rem;
	font-size: 0.88rem;
	font-weight: 550;
	color: var(--ssj-ink);
}

.nds-ssubj__stat-icon {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 1.7rem;
	height: 1.7rem;
	border-radius: 8px;
	color: var(--ssj-accent);
	background: color-mix(in srgb, var(--ssj-accent) 10%, #fff);
	border: 1px solid color-mix(in srgb, var(--ssj-accent) 14%, transparent);
}

.nds-ssubj__actions {
	position: relative;
	z-index: 1;
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 0.75rem 1rem;
	margin-top: 0.35rem;
}

.nds-ssubj__cta {
	display: inline-flex;
	align-items: center;
	gap: 0.35rem;
	height: 44px;
	padding: 0 1.15rem;
	border-radius: 12px;
	font-size: 0.9rem;
	font-weight: 700;
	text-decoration: none;
	color: #fff !important;
	background: var(--ssj-accent);
	box-shadow: 0 1px 2px color-mix(in srgb, var(--ssj-accent) 24%, transparent);
	transition: background-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s var(--ssj-ease);
}

.nds-ssubj__cta span,
.nds-ssubj__secondary span,
.nds-ssubj__viewall span {
	display: inline-block;
	transition: transform 0.25s var(--ssj-ease);
}

.nds-ssubj__cta:hover,
.nds-ssubj__cta:focus-visible {
	background: color-mix(in srgb, var(--ssj-accent) 86%, #000);
	color: #fff !important;
	box-shadow: 0 8px 18px color-mix(in srgb, var(--ssj-accent) 26%, transparent);
}

.nds-ssubj__cta:hover span,
.nds-ssubj__cta:focus-visible span {
	transform: translateX(3px);
}

.nds-ssubj__secondary {
	display: inline-flex;
	align-items: center;
	gap: 0.28rem;
	font-size: 0.9rem;
	font-weight: 650;
	color: var(--ssj-accent);
	text-decoration: none;
	border-bottom: 1px solid transparent;
	transition: color 0.25s ease, border-color 0.25s ease;
}

.nds-ssubj__secondary:hover,
.nds-ssubj__secondary:focus-visible,
.nds-ssubj__viewall:hover,
.nds-ssubj__viewall:focus-visible {
	color: var(--ssj-ink);
	border-bottom-color: currentColor;
}

.nds-ssubj__secondary:hover span,
.nds-ssubj__secondary:focus-visible span,
.nds-ssubj__viewall:hover span,
.nds-ssubj__viewall:focus-visible span {
	transform: translateX(3px);
}

.nds-ssubj__stage {
	min-width: 0;
	display: flex;
	flex-direction: column;
	gap: 0.85rem;
	padding: 0.35rem 0.15rem 0.15rem;
}

.nds-ssubj__stage-head {
	display: flex;
	justify-content: flex-end;
}

.nds-ssubj__viewall {
	display: inline-flex;
	align-items: center;
	gap: 0.28rem;
	font-size: 0.92rem;
	font-weight: 650;
	color: var(--ssj-accent);
	text-decoration: none;
	border-bottom: 1px solid transparent;
	transition: color 0.25s ease, border-color 0.25s ease;
}

.nds-ssubj__carousel {
	position: relative;
	min-width: 0;
}

.nds-ssubj__nav {
	position: absolute;
	top: 38%;
	z-index: 4;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 2.75rem;
	height: 2.75rem;
	border-radius: 999px;
	border: 1px solid rgba(10, 18, 24, 0.08);
	background: rgba(255, 255, 255, 0.94);
	color: var(--ssj-ink);
	box-shadow: 0 10px 24px rgba(10, 18, 24, 0.12);
	cursor: pointer;
	transition: transform 0.25s var(--ssj-ease), box-shadow 0.25s ease, opacity 0.25s ease;
}

.nds-ssubj__nav--prev { left: 0.15rem; }
.nds-ssubj__nav--next { right: 0.15rem; }

.nds-ssubj__nav:hover,
.nds-ssubj__nav:focus-visible {
	transform: scale(1.04);
	box-shadow: 0 14px 28px rgba(10, 18, 24, 0.16);
}

.nds-ssubj__nav:focus-visible,
.nds-ssubj__cta:focus-visible,
.nds-ssubj__secondary:focus-visible,
.nds-ssubj__viewall:focus-visible,
.nds-ssubj-card__title a:focus-visible,
.nds-ssubj-card__add:focus-visible,
.nds-ssubj-card__preview:focus-visible {
	outline: 2px solid var(--ssj-accent);
	outline-offset: 3px;
}

.nds-ssubj__nav[disabled] {
	opacity: 0.35;
	cursor: default;
	pointer-events: none;
}

.nds-ssubj__track {
	display: flex;
	gap: 1.15rem;
	overflow-x: auto;
	overflow-y: hidden;
	scroll-snap-type: x mandatory;
	scroll-behavior: smooth;
	-webkit-overflow-scrolling: touch;
	overscroll-behavior-x: contain;
	padding: 0.35rem 0.35rem 0.85rem;
	cursor: grab;
	scrollbar-width: none;
	-ms-overflow-style: none;
}

.nds-ssubj__track::-webkit-scrollbar {
	display: none;
	width: 0;
	height: 0;
}

.nds-ssubj__track.is-dragging {
	cursor: grabbing;
	scroll-behavior: auto;
	scroll-snap-type: none;
	user-select: none;
}

.nds-ssubj-card {
	flex: 0 0 min(300px, calc(100% - 2.5rem));
	width: min(300px, calc(100% - 2.5rem));
	scroll-snap-align: start;
	display: flex;
	flex-direction: column;
	min-width: 0;
	padding: 0.9rem;
	border-radius: 22px;
	background: #fff;
	border: 1px solid var(--ssj-line);
	box-shadow:
		0 1px 2px rgba(10, 18, 24, 0.03),
		0 14px 30px rgba(10, 18, 24, 0.05);
	transition:
		transform 0.25s var(--ssj-ease),
		box-shadow 0.25s ease,
		border-color 0.25s ease;
}

.nds-ssubj-card__media {
	position: relative;
	display: flex;
	align-items: center;
	justify-content: center;
	width: 100%;
	aspect-ratio: 1 / 0.95;
	margin: 0 0 0.85rem;
	padding: 0.75rem;
	overflow: hidden;
	border-radius: 20px;
	text-decoration: none;
	background:
		radial-gradient(80% 70% at 50% 15%, color-mix(in srgb, var(--ssj-accent) 10%, transparent), transparent 60%),
		linear-gradient(165deg, #f5f8fa 0%, #e8eef2 100%);
}

.nds-ssubj-card__media img {
	display: block;
	width: auto;
	max-width: 74%;
	max-height: 100%;
	height: auto;
	object-fit: contain;
	border-radius: 6px;
	filter: drop-shadow(0 14px 22px rgba(10, 18, 24, 0.2));
	transition: transform 0.25s var(--ssj-ease), filter 0.25s ease;
}

.nds-ssubj-card__shine {
	position: absolute;
	inset: 0;
	pointer-events: none;
	background: linear-gradient(125deg, rgba(255, 255, 255, 0.35), transparent 42%);
	opacity: 0.55;
}

.nds-ssubj-card__ph {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 100%;
	min-height: 10rem;
	color: var(--ssj-soft);
	font-size: 0.8rem;
}

.nds-ssubj-card__body {
	display: flex;
	flex-direction: column;
	gap: 0.45rem;
	min-width: 0;
	flex: 1 1 auto;
}

.nds-ssubj-card__chips {
	display: flex;
	flex-wrap: wrap;
	gap: 0.35rem;
	margin: 0;
}

.nds-ssubj-card__chip {
	display: inline-flex;
	align-items: center;
	height: 22px;
	padding: 0 0.55rem;
	border-radius: 999px;
	font-size: 0.62rem;
	font-weight: 700;
	letter-spacing: 0.04em;
	text-transform: uppercase;
	color: var(--ssj-mute);
	background: #eef1f3;
}

.nds-ssubj-card__chip--subject {
	color: var(--ssj-accent);
	background: color-mix(in srgb, var(--ssj-accent) 10%, #fff);
}

.nds-ssubj-card__title {
	margin: 0;
	font-family: var(--nds-font-display);
	font-size: 1.02rem;
	font-weight: 700;
	letter-spacing: -0.025em;
	line-height: 1.25;
	display: -webkit-box;
	-webkit-line-clamp: 2;
	-webkit-box-orient: vertical;
	overflow: hidden;
}

.nds-ssubj-card__title a {
	color: var(--ssj-ink);
	text-decoration: none;
	transition: color 0.25s ease;
}

.nds-ssubj-card__foot {
	display: flex;
	flex-direction: column;
	gap: 0.55rem;
	margin-top: auto;
	padding-top: 0.25rem;
}

.nds-ssubj-card__price {
	font-size: 1.2rem;
	font-weight: 750;
	letter-spacing: -0.03em;
	color: var(--ssj-ink);
}

.nds-ssubj-card__price .woocommerce-Price-amount,
.nds-ssubj-card__price .amount {
	font-weight: 750;
	color: inherit;
}

.nds-ssubj-card__actions {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 0.55rem 0.85rem;
}

.nds-ssubj-card__add {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	height: 34px;
	padding: 0 0.85rem;
	border-radius: 10px;
	font-size: 0.8rem;
	font-weight: 700;
	text-decoration: none;
	color: #fff !important;
	background: var(--ssj-accent);
	transition: background-color 0.25s ease, transform 0.25s var(--ssj-ease), box-shadow 0.25s ease;
}

.nds-ssubj-card__add:hover,
.nds-ssubj-card__add:focus-visible {
	background: color-mix(in srgb, var(--ssj-accent) 86%, #000);
	color: #fff !important;
	box-shadow: 0 6px 14px color-mix(in srgb, var(--ssj-accent) 24%, transparent);
	transform: translateY(-1px);
}

.nds-ssubj-card__preview {
	display: inline-flex;
	align-items: center;
	gap: 0.25rem;
	font-size: 0.84rem;
	font-weight: 650;
	color: var(--ssj-accent);
	text-decoration: none;
	border-bottom: 1px solid transparent;
	transition: color 0.25s ease, border-color 0.25s ease;
}

.nds-ssubj-card__preview span {
	display: inline-block;
	transition: transform 0.25s var(--ssj-ease);
}

.nds-ssubj-card__preview:hover,
.nds-ssubj-card__preview:focus-visible {
	color: var(--ssj-ink);
	border-bottom-color: currentColor;
}

.nds-ssubj-card__preview:hover span,
.nds-ssubj-card__preview:focus-visible span {
	transform: translateX(3px);
}

.nds-ssubj__progress {
	position: relative;
	height: 3px;
	margin: 0 0.35rem;
	border-radius: 999px;
	background: rgba(10, 18, 24, 0.08);
	overflow: hidden;
}

.nds-ssubj__progress-bar {
	display: block;
	height: 100%;
	width: 28%;
	border-radius: inherit;
	background: var(--ssj-accent);
	transform-origin: left center;
	transition: width 0.2s ease;
}

@media (hover: hover) and (pointer: fine) {
	.nds-ssubj-card:hover,
	.nds-ssubj-card:focus-within {
		transform: translateY(-10px);
		border-color: color-mix(in srgb, var(--ssj-accent) 16%, var(--ssj-line));
		box-shadow:
			0 1px 2px rgba(10, 18, 24, 0.04),
			0 24px 46px rgba(10, 18, 24, 0.12);
	}

	.nds-ssubj-card:hover .nds-ssubj-card__media img,
	.nds-ssubj-card:focus-within .nds-ssubj-card__media img {
		transform: scale(1.03) translateY(-2px);
		filter: drop-shadow(0 18px 28px rgba(10, 18, 24, 0.26));
	}

	.nds-ssubj-card:hover .nds-ssubj-card__title a,
	.nds-ssubj-card:focus-within .nds-ssubj-card__title a {
		color: var(--ssj-accent);
	}
}

@media (max-width: 1100px) {
	.nds-ssubj__shell {
		grid-template-columns: 1fr;
		gap: 1.15rem;
		padding: 1.15rem;
	}

	.nds-ssubj__panel {
		position: static;
	}

	.nds-ssubj__nav--prev { left: 0.15rem; }
	.nds-ssubj__nav--next { right: 0.15rem; }
}

@media (max-width: 760px) {
	.nds-ssubj {
		padding: 2rem 0;
	}

	.nds-ssubj__shell {
		padding: 0.85rem;
		border-radius: 22px;
	}

	.nds-ssubj__panel {
		padding: 1.25rem 1.1rem;
		border-radius: 18px;
	}

	.nds-ssubj-card {
		flex-basis: min(280px, calc(100% - 2.5rem));
		width: min(280px, calc(100% - 2.5rem));
	}

	.nds-ssubj__nav {
		width: 2.4rem;
		height: 2.4rem;
		top: 34%;
	}
}

@media (prefers-reduced-motion: reduce) {
	.nds-ssubj__track {
		scroll-behavior: auto;
	}

	.nds-ssubj-card,
	.nds-ssubj-card__media img,
	.nds-ssubj__cta,
	.nds-ssubj-card__add,
	.nds-ssubj__nav,
	.nds-ssubj__progress-bar {
		transition: none;
	}

	.nds-ssubj-card:hover,
	.nds-ssubj-card:focus-within,
	.nds-ssubj-card__add:hover,
	.nds-ssubj__cta:hover {
		transform: none;
	}

	.nds-ssubj-card:hover .nds-ssubj-card__media img,
	.nds-ssubj-card:focus-within .nds-ssubj-card__media img {
		transform: none;
	}
}