/* BookNest — main styles (mobile first) */

:root {
	--color-primary: #4f46e5;
	--color-primary-hover: #4338ca;
	--color-accent: #f59e0b;
	--color-dark: #0f172a;
	--color-text: #334155;
	--color-muted: #64748b;
	--color-bg: #f8fafc;
	--color-surface: #ffffff;
	--color-border: #e2e8f0;
	--radius: 12px;
	--shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
	--shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
	--shadow-lg: 0 20px 40px rgba(79, 70, 229, 0.12);
	--font-heading: "Poppins", system-ui, sans-serif;
	--font-body: "Inter", system-ui, sans-serif;
	--header-h: 72px;
	--transition: 0.25s ease;
	--container: min(1200px, 100% - 2rem);
}

.booknest-dark {
	--color-dark: #f8fafc;
	--color-text: #cbd5e1;
	--color-muted: #94a3b8;
	--color-bg: #0b1220;
	--color-surface: #111827;
	--color-border: #1f2937;
	--shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
	margin: 0;
	font-family: var(--font-body);
	font-size: 1rem;
	line-height: 1.6;
	color: var(--color-text);
	background: var(--color-bg);
}

h1, h2, h3, h4, h5, h6 {
	font-family: var(--font-heading);
	color: var(--color-dark);
	line-height: 1.25;
	margin: 0 0 0.75rem;
}

a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-hover); }

img { max-width: 100%; height: auto; display: block; }

.container {
	width: var(--container);
	margin-inline: auto;
}

.screen-reader-text {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	border: 0;
}

.skip-link:focus {
	position: fixed;
	top: 1rem;
	left: 1rem;
	z-index: 9999;
	padding: 0.75rem 1rem;
	background: var(--color-surface);
	border-radius: var(--radius);
	box-shadow: var(--shadow-md);
}

/* Buttons */
.btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 0.5rem;
	padding: 0.75rem 1.25rem;
	border-radius: var(--radius);
	border: none;
	font-weight: 600;
	font-family: var(--font-heading);
	cursor: pointer;
	transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.btn--primary {
	background: var(--color-primary);
	color: #fff;
	box-shadow: var(--shadow-sm);
}
.btn--primary:hover {
	background: var(--color-primary-hover);
	transform: translateY(-1px);
	box-shadow: var(--shadow-md);
	color: #fff;
}

.btn--secondary {
	background: var(--color-surface);
	color: var(--color-dark);
	border: 1px solid var(--color-border);
}
.btn--secondary:hover { border-color: var(--color-primary); color: var(--color-primary); }

.btn--accent {
	background: var(--color-accent);
	color: #0f172a;
}
.btn--ghost {
	background: transparent;
	color: var(--color-dark);
	padding: 0.5rem;
}
.btn--icon { padding: 0.5rem; background: transparent; border: none; cursor: pointer; }

.card {
	background: var(--color-surface);
	border-radius: var(--radius);
	box-shadow: var(--shadow-sm);
	border: 1px solid var(--color-border);
}

/* Header */
.site-header {
	position: sticky;
	top: 0;
	z-index: 100;
	background: rgba(248, 250, 252, 0.92);
	backdrop-filter: blur(12px);
	border-bottom: 1px solid var(--color-border);
}
.booknest-dark .site-header { background: rgba(17, 24, 39, 0.92); }

.site-header__inner {
	display: grid;
	grid-template-columns: auto 1fr auto;
	align-items: center;
	gap: 1rem;
	min-height: var(--header-h);
}

.site-title {
	font-family: var(--font-heading);
	font-weight: 700;
	font-size: 1.25rem;
	color: var(--color-dark);
	display: inline-flex;
	align-items: center;
	gap: 0.35rem;
}

.header-search {
	position: relative;
	display: none;
}
.header-search input[type="search"] {
	width: 100%;
	padding: 0.65rem 2.75rem 0.65rem 1rem;
	border: 1px solid var(--color-border);
	border-radius: var(--radius);
	background: var(--color-surface);
	color: var(--color-dark);
}
.live-search-results {
	position: absolute;
	top: calc(100% + 0.5rem);
	left: 0;
	right: 0;
	background: var(--color-surface);
	border: 1px solid var(--color-border);
	border-radius: var(--radius);
	box-shadow: var(--shadow-md);
	max-height: 320px;
	overflow: auto;
	z-index: 50;
}
.live-search-item {
	display: grid;
	grid-template-columns: 48px 1fr;
	gap: 0.75rem;
	padding: 0.75rem 1rem;
	color: inherit;
	border-bottom: 1px solid var(--color-border);
}
.live-search-item:hover { background: var(--color-bg); }
.live-search-item img { border-radius: 6px; aspect-ratio: 3/4; object-fit: cover; }

.primary-nav { justify-self: end; }
.primary-menu {
	display: none;
	list-style: none;
	margin: 0;
	padding: 0;
	gap: 1.25rem;
}
.primary-menu a { color: var(--color-dark); font-weight: 500; }
.primary-menu a:hover { color: var(--color-primary); }

.nav-toggle {
	display: flex;
	flex-direction: column;
	gap: 5px;
	background: none;
	border: none;
	cursor: pointer;
	padding: 0.5rem;
}
.nav-toggle__bar {
	width: 24px;
	height: 2px;
	background: var(--color-dark);
	border-radius: 2px;
}

.header-actions {
	display: flex;
	align-items: center;
	gap: 0.35rem;
}
.header-action {
	position: relative;
	background: none;
	border: none;
	padding: 0.5rem;
	color: var(--color-dark);
	cursor: pointer;
	display: inline-flex;
}
.booknest-cart-count {
	position: absolute;
	top: 0;
	right: 0;
	min-width: 18px;
	height: 18px;
	padding: 0 4px;
	font-size: 0.65rem;
	font-weight: 700;
	line-height: 18px;
	text-align: center;
	background: var(--color-accent);
	color: #0f172a;
	border-radius: 999px;
}

@media (min-width: 768px) {
	.site-header__inner { grid-template-columns: auto minmax(200px, 1fr) auto auto; }
	.header-search { display: block; }
	.primary-menu { display: flex; }
	.nav-toggle { display: none; }
}

/* Mobile nav open */
.nav-open .primary-menu {
	display: flex;
	flex-direction: column;
	position: absolute;
	top: var(--header-h);
	left: 0;
	right: 0;
	background: var(--color-surface);
	padding: 1rem 1.5rem;
	border-bottom: 1px solid var(--color-border);
	box-shadow: var(--shadow-md);
}

/* Hero */
.hero {
	padding: 3rem 0 4rem;
	overflow: hidden;
}
.hero__grid {
	display: grid;
	gap: 2.5rem;
	align-items: center;
}
.hero__title {
	font-size: clamp(2rem, 5vw, 3.25rem);
	letter-spacing: -0.02em;
}
.hero__subtitle {
	font-size: 1.125rem;
	color: var(--color-muted);
	max-width: 32rem;
	margin-bottom: 1.5rem;
}
.hero__cta { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.hero__visual { position: relative; display: flex; justify-content: center; }
.hero-book {
	width: min(280px, 70vw);
	aspect-ratio: 3/4;
	border-radius: var(--radius);
	box-shadow: var(--shadow-lg);
	object-fit: cover;
	animation: floatBook 6s ease-in-out infinite;
}
@keyframes floatBook {
	0%, 100% { transform: translateY(0) rotate(-2deg); }
	50% { transform: translateY(-12px) rotate(2deg); }
}

@media (min-width: 900px) {
	.hero__grid { grid-template-columns: 1fr 1fr; }
}

/* Sections */
.section { padding: 3.5rem 0; }
.section__header {
	display: flex;
	align-items: flex-end;
	justify-content: space-between;
	gap: 1rem;
	margin-bottom: 1.75rem;
}
.section__title { font-size: 1.75rem; }

/* Categories */
.category-row {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 1rem;
}
.category-card {
	display: flex;
	flex-direction: column;
	align-items: center;
	text-align: center;
	padding: 1.25rem;
	transition: transform var(--transition), box-shadow var(--transition);
	color: inherit;
}
.category-card:hover {
	transform: translateY(-4px);
	box-shadow: var(--shadow-md);
}
.category-card__icon {
	font-size: 2rem;
	margin-bottom: 0.5rem;
}
@media (min-width: 640px) {
	.category-row { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1024px) {
	.category-row { grid-template-columns: repeat(6, 1fr); }
}

/* Carousel */
.carousel {
	display: flex;
	gap: 1rem;
	overflow-x: auto;
	scroll-snap-type: x mandatory;
	padding-bottom: 0.5rem;
	scrollbar-width: thin;
}
.carousel .product-card { flex: 0 0 220px; scroll-snap-align: start; }

/* Product grid */
.products-grid {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 1.25rem;
}
@media (min-width: 768px) {
	.products-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1024px) {
	.products-grid { grid-template-columns: repeat(4, 1fr); }
}

.product-card {
	position: relative;
	display: flex;
	flex-direction: column;
	overflow: hidden;
	transition: transform var(--transition), box-shadow var(--transition);
}
.product-card:hover {
	transform: translateY(-4px);
	box-shadow: var(--shadow-md);
}
.product-card__media {
	position: relative;
	aspect-ratio: 3/4;
	overflow: hidden;
	background: var(--color-bg);
}
.product-card__media img {
	width: 100%;
	height: 100%;
	object-fit: cover;
}
.product-card__body { padding: 1rem; flex: 1; display: flex; flex-direction: column; gap: 0.35rem; }
.product-card__author { font-size: 0.875rem; color: var(--color-muted); }
.product-card__title {
	font-size: 1rem;
	font-family: var(--font-heading);
	color: var(--color-dark);
	margin: 0;
}
.product-card__actions {
	display: flex;
	gap: 0.5rem;
	margin-top: auto;
	padding-top: 0.75rem;
}
.badge {
	display: inline-block;
	padding: 0.2rem 0.5rem;
	font-size: 0.7rem;
	font-weight: 700;
	text-transform: uppercase;
	border-radius: 6px;
	background: var(--color-accent);
	color: #0f172a;
}
.badge--bestseller { position: absolute; top: 0.75rem; left: 0.75rem; z-index: 2; }
.wishlist-btn {
	position: absolute;
	top: 0.75rem;
	right: 0.75rem;
	z-index: 2;
	width: 36px;
	height: 36px;
	border-radius: 50%;
	border: none;
	background: rgba(255,255,255,0.9);
	cursor: pointer;
	display: flex;
	align-items: center;
	justify-content: center;
}
.wishlist-btn:hover { color: #ef4444; }

/* Offer banner */
.offer-banner {
	display: grid;
	gap: 1.5rem;
	padding: 2rem;
	background: linear-gradient(135deg, var(--color-primary), #6366f1);
	color: #fff;
	border-radius: var(--radius);
}
.offer-banner h2, .offer-banner p { color: #fff; }
.countdown {
	display: flex;
	gap: 0.75rem;
	flex-wrap: wrap;
}
.countdown__unit {
	min-width: 64px;
	padding: 0.75rem;
	text-align: center;
	background: rgba(255,255,255,0.15);
	border-radius: var(--radius);
}
.countdown__unit strong { display: block; font-size: 1.5rem; font-family: var(--font-heading); }

/* Features */
.features-grid {
	display: grid;
	gap: 1.25rem;
}
@media (min-width: 768px) {
	.features-grid { grid-template-columns: repeat(4, 1fr); }
}
.feature-card { padding: 1.5rem; text-align: center; }
.feature-card__icon { font-size: 2rem; margin-bottom: 0.75rem; }

/* Testimonials */
.testimonial-slider { position: relative; }
.testimonial {
	padding: 2rem;
	text-align: center;
}
.testimonial__quote { font-size: 1.125rem; font-style: italic; margin-bottom: 1rem; }
.testimonial-nav {
	display: flex;
	justify-content: center;
	gap: 0.5rem;
	margin-top: 1rem;
}
.testimonial-nav button {
	width: 10px;
	height: 10px;
	border-radius: 50%;
	border: none;
	background: var(--color-border);
	cursor: pointer;
}
.testimonial-nav button.is-active { background: var(--color-primary); }

/* Newsletter */
.newsletter {
	text-align: center;
	padding: 3rem 1.5rem;
}
.newsletter-form {
	display: flex;
	flex-direction: column;
	gap: 0.75rem;
	max-width: 480px;
	margin: 1rem auto 0;
}
@media (min-width: 480px) {
	.newsletter-form { flex-direction: row; }
}
.newsletter-form input {
	flex: 1;
	padding: 0.75rem 1rem;
	border: 1px solid var(--color-border);
	border-radius: var(--radius);
}

/* Footer */
.site-footer {
	background: var(--color-surface);
	border-top: 1px solid var(--color-border);
	padding: 3rem 0 1.5rem;
	margin-top: 3rem;
}
.footer-grid {
	display: grid;
	gap: 2rem;
	margin-bottom: 2rem;
}
@media (min-width: 768px) {
	.footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
}
.footer-menu { list-style: none; padding: 0; margin: 0; }
.footer-menu a { color: var(--color-muted); }
.footer-social { display: flex; gap: 0.75rem; margin-top: 1rem; }
.payment-icons { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.payment-badge {
	padding: 0.35rem 0.6rem;
	font-size: 0.75rem;
	border-radius: 6px;
	background: var(--color-bg);
	border: 1px solid var(--color-border);
}
.footer-bottom {
	padding-top: 1.5rem;
	border-top: 1px solid var(--color-border);
	text-align: center;
	color: var(--color-muted);
	font-size: 0.875rem;
}

/* Cart drawer */
.cart-drawer {
	position: fixed;
	inset: 0;
	z-index: 200;
	pointer-events: none;
}
.cart-drawer.is-open { pointer-events: auto; }
.cart-drawer__overlay {
	position: absolute;
	inset: 0;
	background: rgba(15, 23, 42, 0.5);
	opacity: 0;
	transition: opacity var(--transition);
}
.cart-drawer.is-open .cart-drawer__overlay { opacity: 1; }
.cart-drawer__panel {
	position: absolute;
	top: 0;
	right: 0;
	width: min(400px, 100%);
	height: 100%;
	background: var(--color-surface);
	box-shadow: var(--shadow-lg);
	transform: translateX(100%);
	transition: transform var(--transition);
	display: flex;
	flex-direction: column;
}
.cart-drawer.is-open .cart-drawer__panel { transform: translateX(0); }
.cart-drawer__header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 1rem 1.25rem;
	border-bottom: 1px solid var(--color-border);
}
.cart-drawer__body { flex: 1; overflow: auto; padding: 1rem 1.25rem; }
.cart-drawer__footer { padding: 1rem 1.25rem; border-top: 1px solid var(--color-border); }

/* Modal */
.modal {
	position: fixed;
	inset: 0;
	z-index: 210;
	display: none;
	align-items: center;
	justify-content: center;
	padding: 1rem;
	background: rgba(15, 23, 42, 0.55);
}
.modal.is-open { display: flex; }
.modal__dialog {
	width: min(900px, 100%);
	max-height: 90vh;
	overflow: auto;
	background: var(--color-surface);
	border-radius: var(--radius);
	padding: 1.5rem;
	position: relative;
}

/* Blog */
.posts-grid { display: grid; gap: 1.5rem; }
@media (min-width: 768px) {
	.posts-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Sticky mobile add to cart */
.sticky-atc {
	position: fixed;
	bottom: 0;
	left: 0;
	right: 0;
	z-index: 90;
	padding: 0.75rem 1rem;
	background: var(--color-surface);
	border-top: 1px solid var(--color-border);
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 1rem;
	transform: translateY(100%);
	transition: transform var(--transition);
}
.sticky-atc.is-visible { transform: translateY(0); }
@media (min-width: 768px) {
	.sticky-atc { display: none; }
}

.booknest-hidden-field { display: none !important; }