/**
 * Khatabook — dark premium × school stationery.
 *
 * Signature device: the whole site sits on a dark ruled page —
 * faint notebook rules, one red margin line, handwritten margin notes.
 */

/* ---------- Tokens ---------- */
:root {
	--kb-ink: #0e1220;
	--kb-ink-2: #141a2e;
	--kb-ink-3: #1a2138;
	--kb-paper: #f6efdf;
	--kb-gold: #e8b84b;
	--kb-gold-soft: #f3d489;
	--kb-red: #e2574c;
	--kb-text: #c3cade;
	--kb-text-dim: #8a93ad;
	--kb-rule: rgba(195, 202, 222, 0.055);
	--kb-line: rgba(195, 202, 222, 0.14);
	--kb-font-display: "Fraunces", georgia, serif;
	--kb-font-body: "Manrope", -apple-system, segoe ui, sans-serif;
	--kb-font-script: "Caveat", "Segoe Script", cursive;
	--kb-max: 1200px;
	--kb-gutter: clamp(20px, 5vw, 64px);
	--kb-radius: 14px;
	--kb-rule-gap: 44px;
}

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

html {
	scroll-behavior: smooth;
}

body {
	margin: 0;
	background-color: var(--kb-ink);
	/* The ruled page: faint horizontal notebook rules. */
	background-image: repeating-linear-gradient(
		to bottom,
		transparent 0,
		transparent calc(var(--kb-rule-gap) - 1px),
		var(--kb-rule) calc(var(--kb-rule-gap) - 1px),
		var(--kb-rule) var(--kb-rule-gap)
	);
	color: var(--kb-text);
	font-family: var(--kb-font-body);
	font-size: 17px;
	line-height: 1.7;
	-webkit-font-smoothing: antialiased;
}

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

a {
	color: var(--kb-gold-soft);
	text-decoration: none;
	transition: color 0.2s ease;
}

a:hover {
	color: var(--kb-gold);
}

:focus-visible {
	outline: 2px solid var(--kb-gold);
	outline-offset: 3px;
	border-radius: 2px;
}

.screen-reader-text {
	position: absolute;
	width: 1px;
	height: 1px;
	overflow: hidden;
	clip: rect(0 0 0 0);
	white-space: nowrap;
}

.skip-link:focus {
	position: fixed;
	top: 12px;
	left: 12px;
	z-index: 999;
	width: auto;
	height: auto;
	clip: auto;
	background: var(--kb-gold);
	color: var(--kb-ink);
	padding: 10px 18px;
	border-radius: 8px;
	font-weight: 700;
}

/* The red margin line — runs the full page height. */
.kb-page {
	position: relative;
	min-height: 100vh;
	overflow-x: clip;
}

.kb-margin-line {
	position: fixed;
	top: 0;
	bottom: 0;
	left: clamp(28px, 6vw, 84px);
	width: 1.5px;
	background: color-mix(in srgb, var(--kb-red) 55%, transparent);
	z-index: 1;
	pointer-events: none;
}

/* Handwritten margin notes */
.kb-margin-note {
	display: inline-block;
	font-family: var(--kb-font-script);
	font-size: clamp(20px, 2.4vw, 26px);
	color: var(--kb-gold);
	transform: rotate(-2deg);
	margin-bottom: 6px;
}

/* ---------- Header ---------- */
.kb-header {
	position: sticky;
	top: 0;
	z-index: 60;
	border-bottom: 1px solid var(--kb-rule);
	transition: box-shadow 0.3s ease;
}

/* Blur lives on a pseudo-element: backdrop-filter on the header itself
   would make it the containing block for the fixed mobile nav overlay,
   trapping the "fullscreen" menu inside the header bar. */
.kb-header::before {
	content: "";
	position: absolute;
	inset: 0;
	z-index: -1;
	backdrop-filter: blur(14px);
	background: color-mix(in srgb, var(--kb-ink) 82%, transparent);
}

.kb-header.is-scrolled {
	box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}

.kb-header-inner {
	max-width: var(--kb-max);
	margin: 0 auto;
	padding: 14px var(--kb-gutter);
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 24px;
}

.kb-logo {
	display: inline-flex;
	align-items: center;
	gap: 12px;
	color: var(--kb-paper);
}

.kb-logo img {
	max-height: 44px;
	width: auto;
}

.kb-logo-mark {
	width: 38px;
	height: 38px;
	flex: none;
	transition: transform 0.3s ease;
}

.kb-logo:hover .kb-logo-mark {
	transform: rotate(-6deg);
}

.kb-logo-text {
	font-family: var(--kb-font-display);
	font-weight: 600;
	font-size: 24px;
	letter-spacing: 0.3px;
	color: var(--kb-paper);
}

.kb-nav {
	display: flex;
	align-items: center;
	gap: 28px;
}

.kb-nav-list {
	display: flex;
	gap: 26px;
	list-style: none;
	margin: 0;
	padding: 0;
}

.kb-nav-list a {
	color: var(--kb-text);
	font-weight: 600;
	font-size: 15px;
	position: relative;
	padding: 6px 0;
}

.kb-nav-list a::after {
	content: "";
	position: absolute;
	left: 0;
	right: 100%;
	bottom: 0;
	height: 2px;
	background: var(--kb-red);
	transition: right 0.25s ease;
}

.kb-nav-list a:hover {
	color: var(--kb-paper);
}

.kb-nav-list a:hover::after,
.kb-nav-list .current-menu-item a::after {
	right: 0;
}

.kb-nav-cta {
	background: var(--kb-gold);
	color: var(--kb-ink);
	font-weight: 800;
	font-size: 14px;
	padding: 10px 20px;
	border-radius: 999px;
	transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.kb-nav-cta:hover {
	color: var(--kb-ink);
	transform: translateY(-2px);
	box-shadow: 0 8px 24px rgba(232, 184, 75, 0.35);
}

.kb-nav-toggle {
	display: none;
	background: none;
	border: 0;
	padding: 10px;
	cursor: pointer;
}

.kb-nav-toggle-bar {
	display: block;
	width: 26px;
	height: 2.5px;
	background: var(--kb-paper);
	margin: 6px 0;
	border-radius: 2px;
	transition: transform 0.25s ease, opacity 0.25s ease;
}

/* ---------- Buttons ---------- */
.kb-btn {
	display: inline-flex;
	align-items: center;
	gap: 10px;
	padding: 14px 30px;
	border-radius: 999px;
	font-weight: 800;
	font-size: 15px;
	letter-spacing: 0.2px;
	transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.kb-btn-gold {
	background: var(--kb-gold);
	color: var(--kb-ink);
}

.kb-btn-gold:hover {
	color: var(--kb-ink);
	transform: translateY(-3px);
	box-shadow: 0 14px 34px rgba(232, 184, 75, 0.35);
}

.kb-btn-ghost {
	border: 1.5px solid var(--kb-line);
	color: var(--kb-paper);
}

.kb-btn-ghost:hover {
	border-color: var(--kb-gold);
	color: var(--kb-gold);
	transform: translateY(-3px);
}

/* ---------- Sections ---------- */
.kb-main {
	position: relative;
	z-index: 2;
}

.kb-section {
	max-width: var(--kb-max);
	margin: 0 auto;
	padding: clamp(64px, 9vw, 120px) var(--kb-gutter) 0;
}

.kb-section-head {
	max-width: 640px;
	margin-bottom: clamp(32px, 5vw, 56px);
}

.kb-section-title {
	font-family: var(--kb-font-display);
	font-weight: 550;
	font-size: clamp(30px, 4.4vw, 46px);
	line-height: 1.12;
	color: var(--kb-paper);
	margin: 0 0 14px;
	text-wrap: balance;
}

.kb-section-sub {
	color: var(--kb-text-dim);
	margin: 0;
	font-size: 17px;
}

.kb-section-more {
	text-align: center;
	margin: 44px 0 0;
}

/* ---------- Hero ---------- */
.kb-hero {
	position: relative;
	min-height: min(88vh, 860px);
	display: flex;
	align-items: center;
	overflow: clip;
}

.kb-hero-inner {
	max-width: var(--kb-max);
	margin: 0 auto;
	padding: clamp(48px, 7vw, 90px) var(--kb-gutter);
	display: grid;
	grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
	align-items: center;
	gap: clamp(32px, 5vw, 72px);
	width: 100%;
}

.kb-hero-note {
	font-size: clamp(22px, 2.6vw, 30px);
}

.kb-hero-title {
	font-family: var(--kb-font-display);
	font-weight: 480;
	font-size: clamp(42px, 6.4vw, 76px);
	line-height: 1.04;
	letter-spacing: -0.5px;
	color: var(--kb-paper);
	margin: 10px 0 22px;
	text-wrap: balance;
}

.kb-hero-title::after {
	content: "";
	display: block;
	width: 96px;
	height: 4px;
	margin-top: 26px;
	background: var(--kb-red);
	border-radius: 2px;
}

.kb-hero-sub {
	max-width: 480px;
	color: var(--kb-text-dim);
	font-size: 18px;
	margin: 0 0 34px;
}

.kb-hero-actions {
	display: flex;
	flex-wrap: wrap;
	gap: 16px;
}

/* Hero load sequence */
.kb-js [data-kb-hero-item] {
	opacity: 0;
	transform: translateY(26px);
	transition: opacity 0.8s cubic-bezier(0.2, 0.7, 0.2, 1), transform 0.8s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.kb-hero-ready [data-kb-hero-item] {
	opacity: 1;
	transform: none;
}

.kb-hero-ready [data-kb-hero-item]:nth-child(1) { transition-delay: 0.05s; }
.kb-hero-ready [data-kb-hero-item]:nth-child(2) { transition-delay: 0.18s; }
.kb-hero-ready [data-kb-hero-item]:nth-child(3) { transition-delay: 0.34s; }
.kb-hero-ready [data-kb-hero-item]:nth-child(4) { transition-delay: 0.5s; }

/* Floating notebook stack */
.kb-hero-stack {
	position: relative;
	height: clamp(380px, 46vw, 560px);
}

.kb-hero-book {
	position: absolute;
	width: clamp(160px, 19vw, 250px);
	filter: drop-shadow(0 30px 40px rgba(0, 0, 0, 0.55));
	transition: transform 0.4s ease;
	will-change: transform;
}

.kb-hero-book .kb-cover-svg,
.kb-hero-book .kb-cover-img {
	width: 100%;
	height: auto;
	display: block;
	border-radius: 10px;
}

.kb-hero-book-1 {
	top: 4%;
	left: 2%;
	rotate: -9deg;
	z-index: 1;
}

.kb-hero-book-2 {
	top: 16%;
	left: 32%;
	rotate: 3deg;
	z-index: 3;
	animation: kb-float 7s ease-in-out infinite;
}

.kb-hero-book-3 {
	top: 40%;
	left: 60%;
	rotate: 10deg;
	z-index: 2;
	animation: kb-float 8.5s ease-in-out 1.2s infinite;
}

@keyframes kb-float {
	0%, 100% { translate: 0 0; }
	50% { translate: 0 -16px; }
}

.kb-doodle {
	position: absolute;
	opacity: 0.9;
}

.kb-doodle-pencil {
	width: clamp(90px, 10vw, 140px);
	top: -4%;
	right: 4%;
	rotate: 24deg;
	animation: kb-float 6s ease-in-out 0.6s infinite;
}

.kb-doodle-clip {
	width: clamp(26px, 3vw, 40px);
	bottom: 6%;
	left: 8%;
	rotate: -18deg;
}

.kb-doodle-scribble {
	width: clamp(100px, 12vw, 170px);
	bottom: -2%;
	right: 12%;
}

.kb-hero-scrollhint {
	position: absolute;
	bottom: 22px;
	left: 50%;
	translate: -50% 0;
	width: 24px;
	height: 38px;
	border: 2px solid var(--kb-line);
	border-radius: 14px;
}

.kb-hero-scrollhint span {
	position: absolute;
	top: 7px;
	left: 50%;
	width: 4px;
	height: 8px;
	translate: -50% 0;
	border-radius: 2px;
	background: var(--kb-gold);
	animation: kb-scrollhint 1.8s ease-in-out infinite;
}

@keyframes kb-scrollhint {
	0% { transform: translateY(0); opacity: 1; }
	70% { transform: translateY(12px); opacity: 0; }
	100% { transform: translateY(0); opacity: 0; }
}

/* ---------- Marquee ---------- */
.kb-marquee {
	border-top: 1px solid var(--kb-rule);
	border-bottom: 1px solid var(--kb-rule);
	background: var(--kb-ink-2);
	overflow: hidden;
	padding: 16px 0;
	transform: rotate(-0.6deg) scale(1.01);
}

.kb-marquee-track {
	display: flex;
	align-items: center;
	gap: 28px;
	width: max-content;
	animation: kb-marquee 36s linear infinite;
}

.kb-marquee-item {
	font-family: var(--kb-font-display);
	font-style: italic;
	font-size: 17px;
	color: var(--kb-gold-soft);
	white-space: nowrap;
}

.kb-marquee-dot {
	color: var(--kb-red);
	font-size: 15px;
}

@keyframes kb-marquee {
	to { transform: translateX(-50%); }
}

/* ---------- Category cards ---------- */
.kb-cat-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
	gap: 18px;
}

.kb-cat-card {
	position: relative;
	display: flex;
	flex-direction: column;
	gap: 4px;
	padding: 26px 26px 22px;
	background: var(--kb-ink-2);
	border: 1px solid var(--kb-rule);
	border-radius: var(--kb-radius);
	overflow: hidden;
	transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

.kb-cat-card::before {
	content: "";
	position: absolute;
	inset: 0 auto 0 0;
	width: 4px;
	background: var(--kb-red);
	opacity: 0;
	transition: opacity 0.25s ease;
}

.kb-cat-card:hover {
	transform: translateY(-5px);
	border-color: var(--kb-line);
	background: var(--kb-ink-3);
}

.kb-cat-card:hover::before {
	opacity: 1;
}

.kb-cat-index {
	font-family: var(--kb-font-script);
	font-size: 22px;
	color: var(--kb-red);
}

.kb-cat-name {
	font-family: var(--kb-font-display);
	font-size: 22px;
	font-weight: 560;
	color: var(--kb-paper);
}

.kb-cat-count {
	font-size: 14px;
	color: var(--kb-text-dim);
}

.kb-cat-arrow {
	position: absolute;
	right: 22px;
	bottom: 18px;
	color: var(--kb-gold);
	font-size: 20px;
	translate: -8px 0;
	opacity: 0;
	transition: translate 0.25s ease, opacity 0.25s ease;
}

.kb-cat-card:hover .kb-cat-arrow {
	translate: 0 0;
	opacity: 1;
}

/* ---------- Notebook cards ---------- */
.kb-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
	gap: clamp(18px, 3vw, 30px);
}

.kb-card {
	position: relative;
	background: var(--kb-ink-2);
	border: 1px solid var(--kb-rule);
	border-radius: var(--kb-radius);
	overflow: hidden;
	transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
	transform-style: preserve-3d;
}

.kb-card:hover {
	border-color: var(--kb-line);
	box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
}

/* red-thread stitch along the card's left edge — the bahi-khata binding */
.kb-card-stitch {
	position: absolute;
	top: 14px;
	bottom: 14px;
	left: 9px;
	width: 0;
	border-left: 2px dashed color-mix(in srgb, var(--kb-red) 65%, transparent);
	pointer-events: none;
}

.kb-card-media {
	display: block;
	padding: 30px 30px 10px;
	background:
		radial-gradient(120% 90% at 50% 0%, rgba(232, 184, 75, 0.08), transparent 60%);
}

.kb-card-media .kb-cover-svg,
.kb-card-media .kb-cover-img {
	width: 100%;
	height: auto;
	display: block;
	border-radius: 8px;
	transition: transform 0.35s ease;
	filter: drop-shadow(0 18px 24px rgba(0, 0, 0, 0.45));
}

.kb-card:hover .kb-card-media .kb-cover-svg,
.kb-card:hover .kb-card-media .kb-cover-img {
	transform: translateY(-6px) rotate(-1.2deg);
}

.kb-card-badge {
	position: absolute;
	top: 16px;
	right: -34px;
	z-index: 2;
	background: var(--kb-red);
	color: #fff;
	font-size: 12px;
	font-weight: 800;
	letter-spacing: 1px;
	text-transform: uppercase;
	padding: 6px 40px;
	transform: rotate(35deg);
}

.kb-card-body {
	padding: 18px 24px 22px 30px;
}

.kb-card-cat {
	font-size: 12.5px;
	font-weight: 700;
	letter-spacing: 1.4px;
	text-transform: uppercase;
	color: var(--kb-text-dim);
}

.kb-card-title {
	font-family: var(--kb-font-display);
	font-size: 21px;
	font-weight: 560;
	line-height: 1.25;
	margin: 6px 0 14px;
}

.kb-card-title a {
	color: var(--kb-paper);
}

.kb-card-title a:hover {
	color: var(--kb-gold);
}

.kb-card-foot {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 12px;
}

.kb-card-price {
	font-weight: 800;
	font-size: 19px;
	color: var(--kb-gold);
}

.kb-card-price del {
	font-weight: 500;
	font-size: 14px;
	color: var(--kb-text-dim);
	margin-left: 6px;
}

/* provider chips on cards */
.kb-buy-chips {
	display: flex;
	gap: 6px;
}

.kb-buy-chip {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 30px;
	height: 30px;
	border-radius: 50%;
	background: color-mix(in srgb, var(--kb-brand) 22%, var(--kb-ink));
	border: 1.5px solid color-mix(in srgb, var(--kb-brand) 65%, transparent);
	color: var(--kb-paper);
	font-size: 12.5px;
	font-weight: 800;
	transition: transform 0.2s ease, background 0.2s ease;
}

.kb-buy-chip:hover {
	transform: translateY(-3px) scale(1.08);
	background: var(--kb-brand);
	color: #fff;
}

.kb-buy-chip-logo {
	overflow: hidden;
	padding: 0;
	background: #fff;
}

.kb-buy-chip img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	border-radius: 50%;
	display: block;
}

/* ---------- Story band ---------- */
.kb-story {
	position: relative;
	margin-top: clamp(72px, 10vw, 130px);
	padding: clamp(72px, 9vw, 120px) var(--kb-gutter);
	background: var(--kb-ink-2);
	border-top: 1px solid var(--kb-rule);
	border-bottom: 1px solid var(--kb-rule);
	overflow: clip;
}

.kb-story-bg {
	position: absolute;
	inset: -20% -10%;
	background:
		radial-gradient(40% 50% at 80% 20%, rgba(232, 184, 75, 0.09), transparent 70%),
		radial-gradient(35% 45% at 10% 90%, rgba(226, 87, 76, 0.08), transparent 70%);
	will-change: transform;
}

.kb-story-inner {
	position: relative;
	max-width: var(--kb-max);
	margin: 0 auto;
	display: grid;
	grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
	gap: clamp(36px, 6vw, 80px);
	align-items: center;
}

.kb-story-copy p {
	color: var(--kb-text-dim);
	font-size: 17.5px;
	max-width: 560px;
}

.kb-stats {
	list-style: none;
	margin: 0;
	padding: 0;
	display: grid;
	gap: 22px;
}

.kb-stat {
	padding: 22px 26px;
	background: var(--kb-ink);
	border: 1px solid var(--kb-rule);
	border-left: 3px solid var(--kb-gold);
	border-radius: 12px;
}

.kb-stat-num {
	display: block;
	font-family: var(--kb-font-display);
	font-size: clamp(34px, 4vw, 46px);
	font-weight: 600;
	color: var(--kb-paper);
	line-height: 1.1;
}

.kb-stat-num::after {
	content: "+";
	color: var(--kb-gold);
}

.kb-stat-label {
	color: var(--kb-text-dim);
	font-size: 15px;
}

/* ---------- Values ---------- */
.kb-values-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
	gap: 18px;
}

.kb-value-card {
	padding: 28px 26px;
	background: var(--kb-ink-2);
	border: 1px solid var(--kb-rule);
	border-radius: var(--kb-radius);
	transition: transform 0.25s ease, border-color 0.25s ease;
}

.kb-value-card:hover {
	transform: translateY(-5px);
	border-color: var(--kb-line);
}

.kb-value-icon {
	display: inline-grid;
	place-items: center;
	width: 46px;
	height: 46px;
	border-radius: 12px;
	background: color-mix(in srgb, var(--kb-gold) 14%, transparent);
	color: var(--kb-gold);
	font-size: 20px;
	margin-bottom: 14px;
}

.kb-value-card h3 {
	font-family: var(--kb-font-display);
	font-size: 20px;
	font-weight: 580;
	color: var(--kb-paper);
	margin: 0 0 8px;
}

.kb-value-card p {
	margin: 0;
	font-size: 15.5px;
	color: var(--kb-text-dim);
}

/* ---------- Providers strip ---------- */
.kb-providers-row {
	display: flex;
	flex-wrap: wrap;
	gap: 14px;
}

.kb-provider-pill {
	display: inline-flex;
	align-items: center;
	gap: 10px;
	padding: 10px 22px 10px 12px;
	border-radius: 999px;
	background: var(--kb-ink-2);
	border: 1px solid color-mix(in srgb, var(--kb-brand) 45%, transparent);
	color: var(--kb-paper);
	font-weight: 700;
	font-size: 15px;
	transition: transform 0.2s ease, background 0.2s ease;
}

.kb-provider-pill:hover {
	transform: translateY(-3px);
}

.kb-provider-letter {
	display: inline-grid;
	place-items: center;
	width: 30px;
	height: 30px;
	border-radius: 50%;
	background: var(--kb-brand);
	color: #fff;
	font-weight: 800;
	font-size: 14px;
	flex: none;
}

.kb-provider-logo img {
	width: 30px;
	height: 30px;
	border-radius: 50%;
	object-fit: cover;
	display: block;
}

/* ---------- CTA ---------- */
.kb-cta {
	padding: clamp(80px, 11vw, 150px) var(--kb-gutter);
	text-align: center;
}

.kb-cta-title {
	font-family: var(--kb-font-display);
	font-weight: 500;
	font-size: clamp(32px, 5vw, 56px);
	color: var(--kb-paper);
	margin: 8px auto 32px;
	max-width: 700px;
	line-height: 1.1;
	text-wrap: balance;
}

/* ---------- Catalog ---------- */
.kb-catalog {
	max-width: var(--kb-max);
	margin: 0 auto;
	padding: clamp(48px, 7vw, 90px) var(--kb-gutter) clamp(64px, 9vw, 120px);
}

.kb-catalog-head {
	max-width: 680px;
	margin-bottom: clamp(30px, 5vw, 52px);
}

.kb-catalog-title {
	font-family: var(--kb-font-display);
	font-weight: 520;
	font-size: clamp(36px, 5.4vw, 60px);
	line-height: 1.06;
	color: var(--kb-paper);
	margin: 6px 0 14px;
}

.kb-catalog-sub {
	color: var(--kb-text-dim);
	margin: 0 0 28px;
}

/* Controls band: full-width tab rail + filter row under the page title. */
.kb-catalog-controls {
	margin-bottom: clamp(30px, 5vw, 52px);
}

.kb-catalog-head:has(+ .kb-catalog-controls) {
	margin-bottom: 14px;
}

/* Category tab rail — ledger section tabs on a hairline, scrolls when long. */
.kb-tabs-wrap {
	position: relative;
}

.kb-tabs-wrap::before,
.kb-tabs-wrap::after {
	content: "";
	position: absolute;
	top: 0;
	bottom: 0;
	width: 56px;
	z-index: 1;
	pointer-events: none;
	opacity: 0;
	transition: opacity 0.25s ease;
}

.kb-tabs-wrap::before {
	left: 0;
	background: linear-gradient(to right, var(--kb-ink) 30%, transparent);
}

.kb-tabs-wrap::after {
	right: 0;
	background: linear-gradient(to left, var(--kb-ink) 30%, transparent);
}

/* Fades appear only when there is hidden content on that side. */
.kb-tabs-wrap.has-overflow:not(.is-start)::before,
.kb-tabs-wrap.has-overflow:not(.is-end)::after {
	opacity: 1;
}

/* Scroll arrows — shown only when the rail overflows. */
.kb-tabs-arrow {
	position: absolute;
	top: calc(50% - 1px);
	transform: translateY(-50%);
	z-index: 2;
	display: none;
	place-items: center;
	width: 34px;
	height: 34px;
	padding: 0;
	border-radius: 50%;
	border: 1px solid var(--kb-line);
	background: var(--kb-ink-2);
	color: var(--kb-text);
	cursor: pointer;
	transition: color 0.2s ease, border-color 0.2s ease, opacity 0.25s ease, transform 0.2s ease;
}

.kb-tabs-arrow svg {
	width: 16px;
	height: 16px;
}

.kb-tabs-arrow:hover {
	color: var(--kb-gold);
	border-color: var(--kb-gold);
}

.kb-tabs-arrow-left {
	left: -6px;
}

.kb-tabs-arrow-right {
	right: -6px;
}

.kb-tabs-wrap.has-overflow .kb-tabs-arrow {
	display: grid;
}

/* Fade out the arrow when its side has nothing more to show. */
.kb-tabs-wrap.is-start .kb-tabs-arrow-left,
.kb-tabs-wrap.is-end .kb-tabs-arrow-right {
	opacity: 0;
	pointer-events: none;
}

.kb-tabs {
	display: flex;
	gap: clamp(22px, 3vw, 38px);
	border-bottom: 1px solid var(--kb-line);
	overflow-x: auto;
	scrollbar-width: none;
	padding: 0 2px;
	scroll-behavior: smooth;
}

.kb-tabs::-webkit-scrollbar {
	display: none;
}

.kb-tab {
	position: relative;
	flex: none;
	padding: 12px 2px 14px;
	font-size: 13px;
	font-weight: 700;
	letter-spacing: 1.8px;
	text-transform: uppercase;
	color: var(--kb-text-dim);
	white-space: nowrap;
	transition: color 0.2s ease;
}

.kb-tab sup {
	font-family: var(--kb-font-script);
	font-size: 14px;
	letter-spacing: 0;
	text-transform: none;
	color: var(--kb-gold);
	margin-left: 5px;
	opacity: 0.75;
}

.kb-tab::after {
	content: "";
	position: absolute;
	left: 0;
	right: 100%;
	bottom: -1px;
	height: 2px;
	background: var(--kb-gold);
	transition: right 0.25s ease;
}

.kb-tab:hover {
	color: var(--kb-paper);
}

.kb-tab:hover::after {
	right: 0;
}

.kb-tab.is-active {
	color: var(--kb-paper);
}

.kb-tab.is-active::after {
	right: 0;
	background: var(--kb-red);
}

/* Filter toolbar (name / price range / store) — airy row, no card chrome. */
.kb-toolbar {
	display: flex;
	flex-wrap: wrap;
	align-items: flex-end;
	gap: 14px 26px;
	margin: 26px 0 0;
}

.kb-toolbar-field {
	margin: 0;
	display: flex;
	flex-direction: column;
	gap: 6px;
}

.kb-toolbar-field label {
	font-size: 12px;
	font-weight: 800;
	letter-spacing: 1.2px;
	text-transform: uppercase;
	color: var(--kb-text-dim);
}

.kb-toolbar input,
.kb-toolbar select {
	padding: 10px 14px;
	background: var(--kb-ink);
	border: 1.5px solid var(--kb-line);
	border-radius: 10px;
	color: var(--kb-paper);
	font-family: var(--kb-font-body);
	font-size: 15px;
	transition: border-color 0.2s ease;
}

.kb-toolbar input:focus,
.kb-toolbar select:focus {
	outline: none;
	border-color: var(--kb-gold);
}

.kb-toolbar-search {
	flex: 1;
	min-width: 220px;
	max-width: 340px;
}

.kb-toolbar-search input {
	width: 100%;
}

.kb-toolbar-range {
	display: flex;
	align-items: center;
	gap: 8px;
	color: var(--kb-text-dim);
}

.kb-toolbar-range input {
	width: 92px;
}

.kb-toolbar select {
	min-width: 160px;
}

.kb-toolbar-actions {
	margin: 0 0 0 auto;
	display: flex;
	align-items: center;
	gap: 14px;
}

.kb-toolbar-btn {
	border: 0;
	cursor: pointer;
	font-family: var(--kb-font-body);
	padding: 11px 26px;
}

.kb-toolbar-clear {
	color: var(--kb-text-dim);
	font-weight: 700;
	font-size: 14px;
	text-decoration: underline;
	text-underline-offset: 3px;
}

.kb-toolbar-clear:hover {
	color: var(--kb-red);
}

@media (max-width: 640px) {
	.kb-toolbar-field,
	.kb-toolbar-search input,
	.kb-toolbar select {
		width: 100%;
		min-width: 0;
	}

	.kb-toolbar-range {
		width: 100%;
	}

	.kb-toolbar-range input {
		flex: 1;
		width: auto;
	}
}

.kb-pagination {
	margin-top: 48px;
	text-align: center;
}

.kb-pagination .nav-links {
	display: inline-flex;
	gap: 8px;
	align-items: center;
}

.kb-pagination .page-numbers {
	display: inline-grid;
	place-items: center;
	min-width: 42px;
	height: 42px;
	padding: 0 14px;
	border-radius: 10px;
	border: 1px solid var(--kb-line);
	color: var(--kb-text);
	font-weight: 700;
}

.kb-pagination .page-numbers.current {
	background: var(--kb-gold);
	border-color: var(--kb-gold);
	color: var(--kb-ink);
}

.kb-empty {
	text-align: center;
	padding: 60px 20px;
}

.kb-empty-script {
	font-family: var(--kb-font-script);
	font-size: 34px;
	color: var(--kb-gold);
	margin: 0 0 10px;
	transform: rotate(-2deg);
}

/* ---------- Single product ---------- */
.kb-product {
	max-width: var(--kb-max);
	margin: 0 auto;
	padding: clamp(40px, 6vw, 80px) var(--kb-gutter) 0;
}

.kb-product-layout {
	display: grid;
	grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
	gap: clamp(36px, 6vw, 90px);
	align-items: start;
}

.kb-product-media {
	position: sticky;
	top: 110px;
}

.kb-product-cover {
	position: relative;
	overflow: hidden;
	border-radius: var(--kb-radius);
	background:
		radial-gradient(120% 100% at 50% 0%, rgba(232, 184, 75, 0.1), transparent 65%),
		var(--kb-ink-2);
	border: 1px solid var(--kb-rule);
	padding: clamp(28px, 4vw, 56px);
}

.kb-product-cover .kb-cover-svg,
.kb-product-cover .kb-cover-img {
	width: 100%;
	height: auto;
	display: block;
	border-radius: 10px;
	filter: drop-shadow(0 28px 36px rgba(0, 0, 0, 0.5));
}

.kb-breadcrumb {
	font-size: 14px;
	color: var(--kb-text-dim);
	display: flex;
	gap: 10px;
	flex-wrap: wrap;
	margin-bottom: 14px;
}

.kb-breadcrumb a {
	color: var(--kb-text-dim);
}

.kb-breadcrumb a:hover {
	color: var(--kb-gold);
}

.kb-product-title {
	font-family: var(--kb-font-display);
	font-weight: 520;
	font-size: clamp(34px, 4.8vw, 54px);
	line-height: 1.08;
	color: var(--kb-paper);
	margin: 0 0 18px;
	text-wrap: balance;
}

.kb-product-price {
	display: flex;
	align-items: baseline;
	gap: 12px;
	flex-wrap: wrap;
	margin: 0 0 20px;
}

.kb-product-price-now {
	font-weight: 800;
	font-size: 32px;
	color: var(--kb-gold);
}

.kb-product-price del {
	color: var(--kb-text-dim);
	font-size: 18px;
}

.kb-product-save {
	background: color-mix(in srgb, var(--kb-red) 20%, transparent);
	color: var(--kb-red);
	border: 1px solid color-mix(in srgb, var(--kb-red) 45%, transparent);
	font-size: 13px;
	font-weight: 800;
	padding: 3px 12px;
	border-radius: 999px;
}

.kb-product-price-hint {
	width: 100%;
	font-size: 13.5px;
	color: var(--kb-text-dim);
}

.kb-product-desc {
	color: var(--kb-text);
	max-width: 60ch;
}

.kb-specs {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
	gap: 12px;
	margin: 26px 0;
	padding: 0;
}

.kb-spec {
	background: var(--kb-ink-2);
	border: 1px solid var(--kb-rule);
	border-radius: 10px;
	padding: 12px 16px;
}

.kb-spec dt {
	font-size: 12px;
	font-weight: 800;
	letter-spacing: 1.2px;
	text-transform: uppercase;
	color: var(--kb-text-dim);
}

.kb-spec dd {
	margin: 3px 0 0;
	font-weight: 700;
	color: var(--kb-paper);
}

.kb-feature-list {
	list-style: none;
	margin: 0 0 8px;
	padding: 0;
}

.kb-feature-list li {
	position: relative;
	padding: 5px 0 5px 30px;
	color: var(--kb-text);
}

.kb-feature-list li::before {
	content: "✓";
	position: absolute;
	left: 0;
	top: 5px;
	width: 20px;
	height: 20px;
	display: grid;
	place-items: center;
	border-radius: 50%;
	background: color-mix(in srgb, var(--kb-gold) 16%, transparent);
	color: var(--kb-gold);
	font-size: 12px;
	font-weight: 800;
}

/* Buy panel — the point of the whole site */
.kb-product-buy {
	margin-top: 30px;
	padding: 26px 26px 18px;
	background: var(--kb-ink-2);
	border: 1px solid var(--kb-rule);
	border-radius: var(--kb-radius);
	position: relative;
}

.kb-product-buy::before {
	content: "";
	position: absolute;
	top: 12px;
	bottom: 12px;
	left: 10px;
	border-left: 2px dashed color-mix(in srgb, var(--kb-red) 65%, transparent);
}

.kb-buy-heading {
	font-family: var(--kb-font-display);
	font-weight: 560;
	font-size: 24px;
	color: var(--kb-paper);
	margin: 0 0 18px;
	display: flex;
	flex-direction: column;
}

.kb-buy-heading .kb-margin-note {
	font-size: 20px;
	margin-bottom: 0;
}

.kb-buy-buttons {
	display: grid;
	gap: 12px;
}

.kb-buy-btn {
	display: flex;
	align-items: center;
	gap: 14px;
	padding: 13px 18px;
	border-radius: 12px;
	background: color-mix(in srgb, var(--kb-brand) 14%, var(--kb-ink));
	border: 1.5px solid color-mix(in srgb, var(--kb-brand) 50%, transparent);
	color: var(--kb-paper);
	transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.kb-buy-btn:hover {
	transform: translateX(6px);
	background: color-mix(in srgb, var(--kb-brand) 28%, var(--kb-ink));
	box-shadow: 0 10px 28px color-mix(in srgb, var(--kb-brand) 25%, transparent);
	color: var(--kb-paper);
}

.kb-buy-btn-text {
	display: flex;
	flex-direction: column;
	line-height: 1.3;
	flex: 1;
}

.kb-buy-btn-text strong {
	font-size: 15.5px;
}

.kb-buy-btn-text em {
	font-style: normal;
	font-size: 14px;
	color: var(--kb-gold);
	font-weight: 700;
}

.kb-buy-btn-arrow {
	font-size: 20px;
	color: var(--kb-brand);
	transition: translate 0.2s ease;
}

.kb-buy-btn:hover .kb-buy-btn-arrow {
	translate: 4px 0;
}

.kb-buy-disclosure {
	font-size: 12.5px;
	color: var(--kb-text-dim);
	margin: 16px 0 0;
}

.kb-related {
	padding-bottom: 0;
}

/* ---------- Blog / pages ---------- */
.kb-post-list {
	display: grid;
	gap: 20px;
	max-width: 760px;
}

.kb-post-teaser {
	padding: 26px 30px;
	background: var(--kb-ink-2);
	border: 1px solid var(--kb-rule);
	border-radius: var(--kb-radius);
}

.kb-post-teaser-title {
	font-family: var(--kb-font-display);
	font-size: 24px;
	margin: 0 0 4px;
}

.kb-post-teaser-title a {
	color: var(--kb-paper);
}

.kb-post-teaser-meta {
	font-size: 13.5px;
	color: var(--kb-text-dim);
	margin: 0 0 10px;
}

.kb-page-article {
	max-width: 800px;
	margin: 0 auto;
	padding: clamp(48px, 7vw, 90px) var(--kb-gutter) clamp(64px, 9vw, 120px);
}

.kb-prose {
	color: var(--kb-text);
}

.kb-prose h2,
.kb-prose h3 {
	font-family: var(--kb-font-display);
	color: var(--kb-paper);
	font-weight: 560;
}

.kb-prose a {
	text-decoration: underline;
	text-underline-offset: 3px;
}

.kb-prose blockquote {
	margin: 28px 0;
	padding: 4px 0 4px 24px;
	border-left: 3px solid var(--kb-red);
	font-family: var(--kb-font-display);
	font-style: italic;
	font-size: 20px;
	color: var(--kb-paper);
}

/* ---------- Contact form ---------- */
.kb-contact-form-wrap {
	margin-top: 44px;
	padding: 30px 30px 24px;
	background: var(--kb-ink-2);
	border: 1px solid var(--kb-rule);
	border-radius: var(--kb-radius);
	position: relative;
}

.kb-contact-form-wrap::before {
	content: "";
	position: absolute;
	top: 12px;
	bottom: 12px;
	left: 10px;
	border-left: 2px dashed color-mix(in srgb, var(--kb-red) 65%, transparent);
}

.kb-form-notice {
	padding: 14px 18px;
	border-radius: 10px;
	font-weight: 600;
}

.kb-form-notice-ok {
	background: color-mix(in srgb, #3fa66a 16%, transparent);
	border: 1px solid color-mix(in srgb, #3fa66a 50%, transparent);
	color: #7fd6a4;
}

.kb-form-notice-err {
	background: color-mix(in srgb, var(--kb-red) 14%, transparent);
	border: 1px solid color-mix(in srgb, var(--kb-red) 50%, transparent);
	color: var(--kb-red);
}

.kb-form-row {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 0 18px;
}

.kb-form-field {
	margin: 0 0 16px;
}

.kb-form-field label {
	display: block;
	font-size: 13px;
	font-weight: 800;
	letter-spacing: 1.2px;
	text-transform: uppercase;
	color: var(--kb-text-dim);
	margin-bottom: 6px;
}

.kb-req {
	color: var(--kb-red);
}

.kb-form-field input,
.kb-form-field textarea {
	width: 100%;
	padding: 12px 16px;
	background: var(--kb-ink);
	border: 1.5px solid var(--kb-line);
	border-radius: 10px;
	color: var(--kb-paper);
	font-family: var(--kb-font-body);
	font-size: 16px;
	transition: border-color 0.2s ease;
}

.kb-form-field input:focus,
.kb-form-field textarea:focus {
	outline: none;
	border-color: var(--kb-gold);
}

.kb-form-field textarea {
	resize: vertical;
	/* ruled lines inside the message box, like a real notebook page */
	background-image: repeating-linear-gradient(
		to bottom,
		transparent 0,
		transparent 31px,
		var(--kb-rule) 31px,
		var(--kb-rule) 32px
	);
	line-height: 32px;
}

.kb-form-submit {
	margin: 6px 0 0;
}

.kb-form-submit .kb-btn {
	border: 0;
	cursor: pointer;
	font-family: var(--kb-font-body);
	font-size: 15px;
}

.kb-hp-field {
	position: absolute;
	left: -9999px;
	width: 1px;
	height: 1px;
	overflow: hidden;
}

@media (max-width: 640px) {
	.kb-form-row {
		grid-template-columns: 1fr;
	}
}

/* ---------- Footer ---------- */
.kb-footer {
	margin-top: clamp(64px, 9vw, 120px);
	border-top: 1px solid var(--kb-rule);
	background: var(--kb-ink-2);
}

.kb-footer-inner {
	max-width: var(--kb-max);
	margin: 0 auto;
	padding: clamp(48px, 6vw, 72px) var(--kb-gutter);
	display: grid;
	grid-template-columns: 2fr 1fr 1fr;
	gap: clamp(28px, 5vw, 64px);
}

.kb-footer-script {
	font-family: var(--kb-font-script);
	font-size: 44px;
	color: var(--kb-gold);
	display: inline-block;
	transform: rotate(-2deg);
}

.kb-footer-tag {
	color: var(--kb-text-dim);
	max-width: 340px;
}

.kb-footer-social {
	list-style: none;
	display: flex;
	gap: 18px;
	margin: 18px 0 0;
	padding: 0;
}

.kb-footer-heading {
	font-size: 13px;
	font-weight: 800;
	letter-spacing: 1.6px;
	text-transform: uppercase;
	color: var(--kb-paper);
	margin: 0 0 14px;
}

.kb-footer-links {
	list-style: none;
	margin: 0;
	padding: 0;
	display: grid;
	gap: 8px;
}

.kb-footer-links a,
.kb-footer-contact a {
	color: var(--kb-text-dim);
}

.kb-footer-links a:hover,
.kb-footer-contact a:hover {
	color: var(--kb-gold);
}

.kb-footer-contact p {
	color: var(--kb-text-dim);
	margin: 0;
}

.kb-footer-bottom {
	border-top: 1px solid var(--kb-rule);
	padding: 20px var(--kb-gutter) 26px;
	max-width: var(--kb-max);
	margin: 0 auto;
}

.kb-footer-disclosure,
.kb-footer-copy {
	font-size: 13px;
	color: var(--kb-text-dim);
	margin: 4px 0;
}

/* ---------- Scroll reveals (hidden state only when JS is running) ---------- */
.kb-js [data-kb-reveal] {
	opacity: 0;
	transform: translateY(28px);
	transition: opacity 0.75s cubic-bezier(0.2, 0.7, 0.2, 1), transform 0.75s cubic-bezier(0.2, 0.7, 0.2, 1);
	transition-delay: var(--kb-delay, 0ms);
}

.kb-js [data-kb-reveal].is-revealed {
	opacity: 1;
	transform: none;
}

/* ---------- Responsive ---------- */
@media (max-width: 1023px) {
	.kb-hero-inner {
		grid-template-columns: 1fr;
	}

	.kb-hero-stack {
		height: clamp(320px, 60vw, 460px);
	}

	.kb-product-layout {
		grid-template-columns: 1fr;
	}

	.kb-product-media {
		position: static;
		max-width: 420px;
	}

	.kb-story-inner {
		grid-template-columns: 1fr;
	}

	.kb-footer-inner {
		grid-template-columns: 1fr 1fr;
	}
}

@media (max-width: 767px) {
	:root {
		--kb-rule-gap: 36px;
	}

	.kb-margin-line {
		left: 16px;
		opacity: 0.6;
	}

	.kb-nav {
		position: fixed;
		inset: 0;
		z-index: 70;
		flex-direction: column;
		justify-content: flex-start;
		align-items: center;
		gap: 34px;
		padding: 90px 24px 48px;
		overflow-y: auto;
		background: var(--kb-ink);
		background-image: repeating-linear-gradient(
			to bottom,
			transparent 0,
			transparent calc(var(--kb-rule-gap) - 1px),
			var(--kb-rule) calc(var(--kb-rule-gap) - 1px),
			var(--kb-rule) var(--kb-rule-gap)
		);
		opacity: 0;
		visibility: hidden;
		transition: opacity 0.3s ease, visibility 0.3s ease;
	}

	.kb-nav.is-open {
		opacity: 1;
		visibility: visible;
	}

	/* Auto margins center the menu when it fits and allow proper
	   scrolling from the top when it doesn't. */
	.kb-nav-list {
		flex-direction: column;
		align-items: center;
		gap: 22px;
		margin-top: auto;
	}

	.kb-nav > .kb-nav-cta {
		margin-bottom: auto;
	}

	.kb-nav-list a {
		font-size: 22px;
		font-family: var(--kb-font-display);
	}

	.kb-nav-toggle {
		display: block;
		position: relative;
		z-index: 80;
	}

	.kb-nav-toggle[aria-expanded="true"] .kb-nav-toggle-bar:nth-child(2) {
		transform: translateY(4.25px) rotate(45deg);
	}

	.kb-nav-toggle[aria-expanded="true"] .kb-nav-toggle-bar:nth-child(3) {
		transform: translateY(-4.25px) rotate(-45deg);
	}

	.kb-footer-inner {
		grid-template-columns: 1fr;
	}

	.kb-hero-title::after {
		margin-top: 18px;
	}

	.kb-card-media {
		padding: 22px 22px 8px;
	}
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
	html {
		scroll-behavior: auto;
	}

	*,
	*::before,
	*::after {
		animation-duration: 0.001s !important;
		animation-iteration-count: 1 !important;
		transition-duration: 0.001s !important;
	}

	[data-kb-reveal],
	[data-kb-hero-item] {
		opacity: 1;
		transform: none;
	}

	.kb-hero-scrollhint {
		display: none;
	}
}