/* Phase 5.2 visual elevation — hero stage, subjects, delivery, free, PDP */

/* —— Staging / admin —— */
.nds-staging-banner + .nds-site-header {
	top: 0;
}

/* —— Hero two-column —— */
.nds-hero {
	position: relative;
	min-height: min(78vh, 42rem);
	display: grid;
	align-items: center;
	background:
		radial-gradient(ellipse 70% 60% at 85% 20%, rgba(215, 235, 238, 0.18), transparent 55%),
		linear-gradient(135deg, #071820 0%, #0e4b53 48%, #0a2f38 100%);
	color: #f5f8f9;
	overflow: hidden;
}

.nds-hero__grid {
	display: grid;
	gap: var(--nds-space-7);
	padding-block: var(--nds-space-8);
	align-items: center;
}

@media (min-width: 960px) {
	.nds-hero__grid {
		grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
		gap: var(--nds-space-8);
		padding-block: var(--nds-space-9) var(--nds-space-8);
	}
}

.nds-hero__copy {
	max-width: 34rem;
}

.nds-hero h1 {
	color: #fff;
	max-width: 14ch;
	margin-bottom: var(--nds-space-4);
}

.nds-hero__lede {
	max-width: 36ch;
	font-size: var(--nds-fs-lg);
	line-height: 1.55;
	opacity: 0.92;
	margin-bottom: var(--nds-space-6);
}

.nds-hero__actions {
	display: flex;
	flex-wrap: wrap;
	gap: var(--nds-space-3);
}

.nds-hero .nds-btn--primary {
	background: #fff;
	color: var(--nds-color-ink);
}

.nds-hero .nds-btn--primary:hover,
.nds-hero .nds-btn--primary:focus-visible {
	background: var(--nds-color-teal-soft);
	color: var(--nds-color-ink);
}

.nds-hero .nds-btn--secondary {
	border-color: rgba(255, 255, 255, 0.5);
	color: #fff;
}

.nds-hero .nds-btn--secondary:hover,
.nds-hero .nds-btn--secondary:focus-visible {
	background: rgba(255, 255, 255, 0.08);
	border-color: #fff;
}

/* Hero visual: device + book stack */
.nds-hero__visual {
	display: flex;
	justify-content: center;
	min-height: 18rem;
}

.nds-hero-stage {
	position: relative;
	width: min(100%, 28rem);
	aspect-ratio: 5 / 4;
	overflow: hidden;
}

.nds-hero-stage__glow {
	position: absolute;
	inset: 10% 5% 15% 20%;
	border-radius: 50%;
	background: radial-gradient(circle, rgba(215, 235, 238, 0.22), transparent 70%);
	pointer-events: none;
	z-index: 0;
}

.nds-hero-stage__device {
	position: absolute;
	inset: 10% 6% 18% 34%;
	border-radius: 1rem;
	background: linear-gradient(160deg, #1a3a48, #0b2430);
	border: 2px solid rgba(255, 255, 255, 0.12);
	box-shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
	padding: 1.1rem;
	transform: rotate(-2deg);
	z-index: 1;
}

.nds-hero-stage__screen {
	height: 100%;
	border-radius: 0.5rem;
	background: linear-gradient(180deg, #f2f5f6 0%, #e6ecee 100%);
	color: var(--nds-color-ink);
	padding: 0.9rem;
	display: grid;
	align-content: start;
	gap: 0.5rem;
}

.nds-hero-stage__label {
	font-size: 0.65rem;
	font-weight: 700;
	letter-spacing: 0.06em;
	color: var(--nds-color-teal);
}

.nds-hero-stage__title {
	font-weight: 700;
	font-size: 0.95rem;
}

.nds-hero-stage__row {
	display: block;
	height: 0.45rem;
	border-radius: 999px;
	background: rgba(11, 36, 48, 0.12);
	width: 88%;
}

.nds-hero-stage__row--short { width: 62%; }

.nds-hero-stack {
	list-style: none;
	margin: 0;
	padding: 0;
	position: absolute;
	inset: 0;
	pointer-events: none;
	z-index: 2;
}

.nds-hero-stack__item {
	position: absolute;
	width: 38%;
	aspect-ratio: 3 / 4;
	border-radius: var(--nds-radius-sm);
	overflow: hidden;
	box-shadow:
		0 16px 32px rgba(0, 0, 0, 0.4),
		0 0 0 1px rgba(255, 255, 255, 0.28);
	background: #f4f7f8;
}

.nds-hero-stack__item img,
.nds-hero-stack__fallback {
	width: 100%;
	height: 100%;
	object-fit: cover;
	object-position: center top;
	display: block;
}

.nds-hero-stack__fallback {
	background: linear-gradient(145deg, var(--nds-color-teal), var(--nds-color-ink));
}

/* Keep device readable: covers frame the left/bottom, not the full screen. */
.nds-hero-stack__item--1 { left: 2%; bottom: 6%; transform: rotate(-8deg); z-index: 3; width: 36%; }
.nds-hero-stack__item--2 { left: 22%; bottom: 2%; transform: rotate(-1deg); z-index: 4; width: 34%; }
.nds-hero-stack__item--3 { right: 4%; top: 8%; transform: rotate(7deg); z-index: 2; width: 30%; opacity: 0.92; }

@media (max-width: 1279px) and (min-width: 960px) {
	.nds-hero-stage__device { inset: 12% 8% 20% 30%; }
	.nds-hero-stack__item--3 { width: 28%; right: 2%; }
}

@media (max-width: 959px) {
	.nds-hero-stage__device {
		inset: 8% 18% 28% 18%;
		transform: none;
	}

	.nds-hero-stack__item--1 { left: 4%; bottom: 0; width: 32%; }
	.nds-hero-stack__item--2 { left: auto; right: 4%; bottom: 0; width: 32%; transform: rotate(6deg); }
	.nds-hero-stack__item--3 { display: none; }
}

@media (prefers-reduced-motion: no-preference) {
	.nds-hero-stage__device {
		animation: nds-float var(--nds-dur-slow) var(--nds-ease) both;
	}
}

@keyframes nds-float {
	from { opacity: 0; transform: rotate(-2deg) translateY(12px); }
	to { opacity: 1; transform: rotate(-2deg) translateY(0); }
}

/* —— Trust strip —— */
.nds-trust-strip {
	background: var(--nds-color-surface);
	border-bottom: 1px solid var(--nds-color-border);
	padding: var(--nds-space-6) 0;
}

.nds-trust-strip__list {
	display: grid;
	gap: var(--nds-space-5);
	list-style: none;
	margin: 0;
	padding: 0;
}

@media (min-width: 768px) {
	.nds-trust-strip__list { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1100px) {
	.nds-trust-strip__list { grid-template-columns: repeat(4, 1fr); gap: var(--nds-space-6); }
}

.nds-trust-strip__icon {
	display: grid;
	place-items: center;
	width: 2.5rem;
	height: 2.5rem;
	margin-bottom: var(--nds-space-3);
	border-radius: var(--nds-radius-md);
	background: var(--nds-color-teal-soft);
	color: var(--nds-color-teal-deep);
}

.nds-trust-strip strong {
	display: block;
	font-size: var(--nds-fs-md);
	margin-bottom: var(--nds-space-2);
}

.nds-trust-strip li > span:last-child {
	display: block;
	font-size: var(--nds-fs-sm);
	color: var(--nds-color-muted);
	line-height: 1.5;
}

/* —— Subject cards —— */
.nds-subject-grid {
	display: grid;
	gap: var(--nds-space-4);
}

@media (min-width: 640px) {
	.nds-subject-grid { grid-template-columns: repeat(2, 1fr); }
}

.nds-subject-card {
	display: grid;
	grid-template-columns: auto 1fr auto;
	gap: var(--nds-space-4);
	align-items: center;
	padding: var(--nds-space-5);
	text-decoration: none;
	color: inherit;
	background: var(--nds-color-surface);
	border: 1px solid var(--nds-color-border);
	border-radius: var(--nds-radius-lg);
	border-left: 4px solid var(--nds-color-teal);
	transition: transform var(--nds-dur) var(--nds-ease), box-shadow var(--nds-dur) var(--nds-ease), border-color var(--nds-dur) var(--nds-ease);
}

.nds-subject-card--fundamentals { border-left-color: var(--nds-accent-fundamentals); }
.nds-subject-card--medical-surgical { border-left-color: var(--nds-accent-medsurg); }
.nds-subject-card--pediatrics { border-left-color: var(--nds-accent-pediatrics); }
.nds-subject-card--pharmacology { border-left-color: var(--nds-accent-pharm); }

.nds-subject-card:hover,
.nds-subject-card:focus-visible {
	box-shadow: var(--nds-shadow-lift);
	transform: translateY(-2px);
}

.nds-subject-card__icon {
	display: grid;
	place-items: center;
	width: 2.75rem;
	height: 2.75rem;
	border-radius: var(--nds-radius-md);
	background: var(--nds-color-paper-deep);
	color: var(--nds-color-teal-deep);
}

.nds-subject-card__name {
	display: block;
	font-weight: 700;
	font-size: var(--nds-fs-lg);
	margin-bottom: 0.2rem;
}

.nds-subject-card__desc {
	display: block;
	font-size: var(--nds-fs-sm);
	color: var(--nds-color-muted);
	margin-bottom: 0.35rem;
}

.nds-subject-card__meta {
	display: block;
	font-size: var(--nds-fs-xs);
	font-weight: 600;
	color: var(--nds-color-teal-deep);
}

.nds-subject-card__arrow {
	color: var(--nds-color-muted);
}

/* —— Delivery steps —— */
.nds-delivery-steps {
	list-style: none;
	margin: 0;
	padding: 0;
	display: grid;
	gap: var(--nds-space-5);
	counter-reset: none;
}

@media (min-width: 900px) {
	.nds-delivery-steps {
		grid-template-columns: repeat(3, 1fr);
		gap: var(--nds-space-6);
		position: relative;
	}

	.nds-delivery-steps::before {
		content: "";
		position: absolute;
		top: 2.1rem;
		left: 12%;
		right: 12%;
		height: 2px;
		background: linear-gradient(90deg, var(--nds-color-teal-soft), var(--nds-color-teal), var(--nds-color-teal-soft));
		z-index: 0;
	}
}

.nds-delivery-steps li {
	position: relative;
	z-index: 1;
	display: grid;
	gap: var(--nds-space-3);
	justify-items: start;
	padding: var(--nds-space-5);
	background: var(--nds-color-surface);
	border: 1px solid var(--nds-color-border);
	border-radius: var(--nds-radius-lg);
}

@media (min-width: 900px) {
	.nds-delivery-steps li { justify-items: center; text-align: center; }
}

.nds-delivery-steps__num {
	position: absolute;
	top: var(--nds-space-4);
	right: var(--nds-space-4);
	font-size: var(--nds-fs-xs);
	font-weight: 700;
	color: var(--nds-color-teal);
}

.nds-delivery-steps__icon {
	display: grid;
	place-items: center;
	width: 3rem;
	height: 3rem;
	border-radius: 999px;
	background: var(--nds-color-teal-soft);
	color: var(--nds-color-teal-deep);
}

.nds-delivery-steps strong { font-size: var(--nds-fs-lg); }
.nds-delivery-steps li > span:last-child {
	font-size: var(--nds-fs-sm);
	color: var(--nds-color-muted);
}

/* —— Free section —— */
.nds-section--free {
	background:
		linear-gradient(180deg, rgba(229, 243, 234, 0.55), rgba(244, 247, 248, 0.2));
}

.nds-section--cta {
	padding-block: var(--nds-space-8);
	background:
		radial-gradient(circle at 50% 0%, rgba(215, 235, 238, 0.55), transparent 55%),
		var(--nds-color-paper);
}

.nds-faq-panel {
	background: rgba(255, 255, 255, 0.06);
	border: 1px solid rgba(255, 255, 255, 0.12);
	border-radius: var(--nds-radius-lg);
	padding: var(--nds-space-5);
}

.nds-faq-panel p:last-child { margin-bottom: 0; }

.nds-section--inverse .nds-btn--primary {
	background: #fff;
	color: var(--nds-color-ink);
}

/* —— Header polish (Phase 5.3B defers chrome to header.css) —— */
.nds-brand__mark {
	font-family: var(--nds-font-display);
	letter-spacing: 0.04em;
}

.nds-btn--compact {
	min-height: 2.4rem;
	padding-inline: 0.9rem;
}

.nds-nav__list .current-menu-item > a {
	color: var(--nds-color-teal-deep);
	box-shadow: inset 0 -2px 0 var(--nds-color-teal);
}

/* —— Footer —— */
.nds-footer-brand__mark {
	display: grid;
	place-items: center;
	width: 2.5rem;
	height: 2.5rem;
	margin: 0 0 var(--nds-space-3);
	border-radius: var(--nds-radius-md);
	background: rgba(255, 255, 255, 0.1);
	font-weight: 700;
	font-size: var(--nds-fs-xs);
	letter-spacing: 0.04em;
	color: #fff;
}

.nds-footer-draft {
	opacity: 0.65;
	font-size: 0.85em;
}

.nds-footer-meta {
	margin-top: var(--nds-space-6);
	padding-top: var(--nds-space-5);
	border-top: 1px solid rgba(255, 255, 255, 0.12);
	font-size: var(--nds-fs-sm);
	color: rgba(215, 224, 228, 0.85);
}

/* —— Shop archive —— */
.nds-archive-header {
	margin-bottom: var(--nds-space-6);
	padding-bottom: var(--nds-space-5);
	border-bottom: 1px solid var(--nds-color-border);
}

.nds-archive-header h1 { margin-bottom: var(--nds-space-3); }

.nds-filter-bar.is-open,
.nds-filter-bar {
	box-shadow: var(--nds-shadow-sm);
}

.nds-filter-toggle {
	display: none;
	margin-bottom: var(--nds-space-4);
}

@media (max-width: 767px) {
	.nds-filter-toggle { display: inline-flex; }

	.nds-filter-bar {
		display: none;
	}

	.nds-filter-bar.is-open {
		display: grid;
	}
}

/* —— PDP elevation —— */
.nds-pdp {
	display: grid;
	gap: var(--nds-space-6);
	margin-bottom: var(--nds-space-7);
}

@media (min-width: 900px) {
	.nds-pdp {
		grid-template-columns: minmax(14rem, 22rem) minmax(0, 1fr);
		gap: var(--nds-space-8);
		align-items: start;
	}
}

.nds-pdp__cover {
	aspect-ratio: 3 / 4;
	border-radius: var(--nds-radius-lg);
	overflow: hidden;
	background: var(--nds-color-paper-deep);
	box-shadow: var(--nds-shadow-md);
}

.nds-pdp__cover img {
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.nds-pdp__price {
	font-size: var(--nds-fs-2xl);
	font-weight: 700;
	margin: var(--nds-space-4) 0;
}

.nds-pdp__lede {
	max-width: 42ch;
	color: var(--nds-color-muted);
}

.nds-digital-callout {
	padding: var(--nds-space-4);
	border-radius: var(--nds-radius-md);
	background: var(--nds-color-teal-soft);
	border: 1px solid transparent;
	margin-bottom: var(--nds-space-5);
}

.nds-pdp-meta {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr));
	gap: var(--nds-space-3);
	margin: var(--nds-space-5) 0 0;
}

.nds-pdp-meta div {
	padding: var(--nds-space-3);
	background: var(--nds-color-surface);
	border: 1px solid var(--nds-color-border);
	border-radius: var(--nds-radius-md);
}

.nds-pdp-meta dt {
	font-size: var(--nds-fs-xs);
	color: var(--nds-color-muted);
	margin: 0 0 0.2rem;
}

.nds-pdp-meta dd {
	margin: 0;
	font-weight: 600;
}