E-commerce Shop

/* ═══════════════════════════════════════════════════════════════════
   E-commerce Shop — styles.css
   Light-themed mini shop with product grid, detail view, and cart
   ═══════════════════════════════════════════════════════════════════ */

/* ── Tokens ───────────────────────────────────────────────────────── */
:root {
  --page-bg: #fafaf8;
  --page-surface: #ffffff;
  --page-border: #e5e5e0;
  --page-text: #1a1a1a;
  --page-muted: #6b6b65;
  --page-accent: #e85d3a;
  --page-accent-dark: #c04828;
  --page-accent-light: #fff0ec;
  --page-cart: #2a2a2a;
  --page-success: #22c55e;
  --page-badge: #ef4444;

  --font: "SF Pro Display", "Inter", system-ui, -apple-system, sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --header-h: 120px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
}

/* ── Reset ────────────────────────────────────────────────────────── */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  background: var(--page-bg);
  color: var(--page-text);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

a {
  text-decoration: none;
  color: inherit;
}

/* ── Demo Shell Overrides (light theme) ───────────────────────────── */
.demo-shell-back {
  background: rgba(255, 255, 255, 0.85) !important;
  border-color: rgba(0, 0, 0, 0.12) !important;
  color: var(--page-accent) !important;
}

.demo-shell-info {
  background: rgba(250, 250, 248, 0.95) !important;
  border-top-color: rgba(0, 0, 0, 0.08) !important;
  color: var(--page-muted) !important;
}

.demo-shell-info .demo-title {
  color: var(--page-text) !important;
}

.demo-shell-info .demo-tag {
  background: rgba(232, 93, 58, 0.1) !important;
  border-color: rgba(232, 93, 58, 0.2) !important;
  color: var(--page-accent) !important;
}

.motion-toggle {
  background: rgba(255, 255, 255, 0.85) !important;
  border-color: rgba(0, 0, 0, 0.12) !important;
  color: var(--page-accent) !important;
}

/* ═══════════════════════════════════════════════════════════════════
   STORE HEADER
   ═══════════════════════════════════════════════════════════════════ */
.store-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--page-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
}

.brand {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--page-text);
}

/* Cart trigger */
.cart-trigger {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  color: var(--page-text);
  transition: background 0.2s, color 0.2s;
}

.cart-trigger:hover {
  background: var(--page-accent-light);
  color: var(--page-accent);
}

.cart-badge {
  position: absolute;
  top: 4px;
  right: 2px;
  min-width: 18px;
  height: 18px;
  border-radius: 9px;
  background: var(--page-badge);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
  pointer-events: none;
  opacity: 0;
  transform: scale(0);
  transition: opacity 0.2s, transform 0.2s;
}

.cart-badge.visible {
  opacity: 1;
  transform: scale(1);
}

/* Filter Nav */
.filter-nav {
  display: flex;
  gap: 8px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 14px;
  flex-wrap: wrap;
}

.filter-pill {
  padding: 7px 18px;
  border-radius: var(--radius-pill);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--page-muted);
  border: 1px solid var(--page-border);
  background: var(--page-surface);
  transition: all 0.25s ease;
  white-space: nowrap;
}

.filter-pill:hover {
  border-color: var(--page-accent);
  color: var(--page-accent);
}

.filter-pill.active {
  background: var(--page-accent);
  border-color: var(--page-accent);
  color: #fff;
}

/* ═══════════════════════════════════════════════════════════════════
   HERO SECTION
   ═══════════════════════════════════════════════════════════════════ */
.hero-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 56px 24px 24px;
}

.hero-headline {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: var(--page-text);
}

.hero-headline .word {
  display: inline-block;
  opacity: 0;
  transform: translateY(20px);
}

.hero-sub {
  margin-top: 12px;
  font-size: 1.05rem;
  color: var(--page-muted);
  font-weight: 400;
}

/* ═══════════════════════════════════════════════════════════════════
   PRODUCT GRID
   ═══════════════════════════════════════════════════════════════════ */
.grid-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* ── Product Card ─────────────────────────────────────────────────── */
.product-card {
  background: var(--page-surface);
  border-radius: var(--radius);
  border: 1px solid var(--page-border);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
  cursor: pointer;
  /* for GSAP Flip */
  position: relative;
}

.product-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

/* Card image area */
.card-image {
  aspect-ratio: 1 / 1;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-image .shape-inner {
  position: absolute;
  width: 50%;
  height: 50%;
  opacity: 0.35;
}

/* Shape variations */
.shape-circle .shape-inner {
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  box-shadow: 0 0 40px rgba(255, 255, 255, 0.3);
}

.shape-rounded-sq .shape-inner {
  border-radius: 20%;
  background: rgba(255, 255, 255, 0.45);
  transform: rotate(15deg);
  box-shadow: 0 0 40px rgba(255, 255, 255, 0.25);
}

.shape-abstract-a .shape-inner {
  clip-path: polygon(50% 0%, 100% 38%, 82% 100%, 18% 100%, 0% 38%);
  background: rgba(255, 255, 255, 0.45);
}

.shape-abstract-b .shape-inner {
  clip-path: polygon(25% 0%, 100% 0%, 75% 100%, 0% 100%);
  background: rgba(255, 255, 255, 0.45);
  transform: rotate(-5deg);
}

/* Product gradients */
.grad-merino {
  background: linear-gradient(145deg, #d4b896, #7a5c3e);
}
.grad-canvas {
  background: linear-gradient(145deg, #8b9a6b, #2d4a2e);
}
.grad-ceramic {
  background: linear-gradient(145deg, #f5e6d3, #c4623a);
}
.grad-linen {
  background: linear-gradient(145deg, #9bb5cb, #2b3f5c);
}
.grad-leather {
  background: linear-gradient(145deg, #c9a87c, #4a2c12);
}
.grad-stoneware {
  background: linear-gradient(145deg, #a8a8a0, #3a3a38);
}
.grad-organic {
  background: linear-gradient(145deg, #9ab896, #2a4f28);
}
.grad-brass {
  background: linear-gradient(145deg, #d4b04a, #7a5f1e);
}
.grad-runner {
  background: linear-gradient(145deg, #d6ccb8, #a89272);
}

/* Additional inner shapes using ::after for more visual interest */
.card-image::after {
  content: "";
  position: absolute;
  opacity: 0.12;
  pointer-events: none;
}

.shape-circle::after {
  width: 30%;
  height: 30%;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.6);
  bottom: 20%;
  right: 18%;
}

.shape-rounded-sq::after {
  width: 25%;
  height: 25%;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.4);
  top: 15%;
  left: 15%;
  transform: rotate(-10deg);
}

.shape-abstract-a::after {
  width: 20%;
  height: 20%;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.5);
  top: 20%;
  right: 22%;
}

.shape-abstract-b::after {
  width: 35%;
  height: 2px;
  background: rgba(255, 255, 255, 0.5);
  bottom: 30%;
  left: 15%;
  transform: rotate(-15deg);
}

/* Card body */
.card-body {
  padding: 16px 16px 8px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.card-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--page-text);
  letter-spacing: -0.01em;
}

.card-price {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--page-muted);
}

/* Add to cart button */
.btn-add {
  margin: 8px 16px 16px;
  padding: 10px 0;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--page-accent);
  color: var(--page-accent);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  transition: background 0.25s, color 0.25s;
}

.btn-add:hover {
  background: var(--page-accent);
  color: #fff;
}

/* ═══════════════════════════════════════════════════════════════════
   PRODUCT DETAIL OVERLAY
   ═══════════════════════════════════════════════════════════════════ */
.detail-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

.detail-overlay.open {
  pointer-events: auto;
  opacity: 1;
  visibility: visible;
}

.detail-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.detail-panel {
  position: relative;
  width: 90%;
  max-width: 800px;
  max-height: 90vh;
  overflow-y: auto;
  background: var(--page-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  display: grid;
  grid-template-columns: 1fr 1fr;
  z-index: 1;
}

.detail-close {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 5;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--page-bg);
  border: 1px solid var(--page-border);
  color: var(--page-text);
  transition: background 0.2s, color 0.2s;
}

.detail-close:hover {
  background: var(--page-accent-light);
  color: var(--page-accent);
}

/* Detail image */
.detail-image {
  aspect-ratio: 4 / 3;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius) 0 0 var(--radius);
  overflow: hidden;
  min-height: 300px;
}

.detail-image .shape-inner {
  position: absolute;
  width: 40%;
  height: 40%;
  opacity: 0.35;
}

/* Detail info */
.detail-info {
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.detail-title {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--page-text);
  view-transition-name: product-title;
}

.detail-category {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  color: var(--page-accent);
}

.detail-desc {
  font-size: 0.92rem;
  color: var(--page-muted);
  line-height: 1.7;
}

.detail-price {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--page-text);
  margin-top: 4px;
}

/* Quantity selector */
.qty-selector {
  display: flex;
  align-items: center;
  gap: 0;
  margin-top: 8px;
  width: fit-content;
  border: 1px solid var(--page-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.qty-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--page-text);
  background: var(--page-bg);
  transition: background 0.2s, color 0.2s;
}

.qty-btn:hover {
  background: var(--page-accent-light);
  color: var(--page-accent);
}

.qty-value {
  width: 44px;
  text-align: center;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--page-text);
  border-left: 1px solid var(--page-border);
  border-right: 1px solid var(--page-border);
  line-height: 40px;
}

/* Large add button */
.btn-add-large {
  margin-top: 12px;
  padding: 14px 0;
  border-radius: var(--radius-sm);
  background: var(--page-accent);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  transition: background 0.25s;
}

.btn-add-large:hover {
  background: var(--page-accent-dark);
}

/* ═══════════════════════════════════════════════════════════════════
   CART SIDEBAR
   ═══════════════════════════════════════════════════════════════════ */
.cart-sidebar {
  position: fixed;
  inset: 0;
  z-index: 300;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.cart-sidebar.open {
  pointer-events: auto;
  opacity: 1;
  visibility: visible;
}

.cart-sidebar-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
}

.cart-panel {
  position: absolute;
  top: 0;
  right: 0;
  width: 380px;
  height: 100%;
  background: var(--page-surface);
  box-shadow: -8px 0 30px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.cart-sidebar.open .cart-panel {
  transform: translateX(0);
}

.cart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--page-border);
}

.cart-heading {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.cart-close {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--page-text);
  transition: background 0.2s;
}

.cart-close:hover {
  background: var(--page-bg);
}

/* Cart items */
.cart-items {
  flex: 1;
  overflow-y: auto;
  padding: 16px 24px;
}

.cart-empty {
  color: var(--page-muted);
  font-size: 0.9rem;
  text-align: center;
  padding-top: 40px;
}

.cart-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--page-border);
}

.cart-item-swatch {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.cart-item-details {
  flex: 1;
  min-width: 0;
}

.cart-item-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--page-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cart-item-meta {
  font-size: 0.78rem;
  color: var(--page-muted);
  margin-top: 2px;
}

.cart-item-price {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--page-text);
  flex-shrink: 0;
}

.cart-item-remove {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 0.75rem;
  color: var(--page-muted);
  flex-shrink: 0;
  transition: background 0.2s, color 0.2s;
}

.cart-item-remove:hover {
  background: rgba(239, 68, 68, 0.1);
  color: var(--page-badge);
}

/* Cart footer */
.cart-footer {
  padding: 20px 24px;
  border-top: 1px solid var(--page-border);
}

.cart-total {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 16px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--page-text);
}

.btn-checkout {
  width: 100%;
  padding: 14px 0;
  border-radius: var(--radius-sm);
  background: var(--page-cart);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  transition: background 0.25s;
}

.btn-checkout:hover {
  background: #111;
}

/* ═══════════════════════════════════════════════════════════════════
   VIEW TRANSITION NAMES
   ═══════════════════════════════════════════════════════════════════ */
.product-card.vt-active .card-image {
  view-transition-name: product-hero;
}

.product-card.vt-active .card-title {
  view-transition-name: product-title;
}

.detail-overlay.open .detail-image {
  view-transition-name: product-hero;
}

/* View Transition animation tuning */
::view-transition-old(product-hero),
::view-transition-new(product-hero) {
  animation-duration: 0.4s;
  animation-timing-function: cubic-bezier(0.16, 1, 0.3, 1);
}

::view-transition-old(product-title),
::view-transition-new(product-title) {
  animation-duration: 0.35s;
  animation-timing-function: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ═══════════════════════════════════════════════════════════════════
   REDUCED MOTION
   ═══════════════════════════════════════════════════════════════════ */
.reduced-motion .product-card {
  opacity: 1 !important;
  transform: none !important;
}

.reduced-motion .hero-headline .word {
  opacity: 1 !important;
  transform: none !important;
}

.reduced-motion .product-card:hover {
  transform: none;
}

.reduced-motion .cart-panel {
  transition: none;
}

.reduced-motion .detail-overlay {
  transition: none;
}

.reduced-motion .cart-sidebar {
  transition: none;
}

/* ═══════════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════════ */
@media (max-width: 900px) {
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }
}

@media (max-width: 600px) {
  .product-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .hero-section {
    padding: 40px 16px 16px;
  }

  .grid-section {
    padding: 24px 16px 60px;
  }

  .header-inner {
    padding: 14px 16px;
  }

  .filter-nav {
    padding: 0 16px 12px;
    gap: 6px;
  }

  .filter-pill {
    padding: 6px 14px;
    font-size: 0.78rem;
  }

  /* Detail panel - stacked layout on mobile */
  .detail-panel {
    grid-template-columns: 1fr;
    width: 95%;
    max-height: 85vh;
  }

  .detail-image {
    border-radius: var(--radius) var(--radius) 0 0;
    aspect-ratio: 16 / 10;
    min-height: 200px;
  }

  .detail-info {
    padding: 24px 20px 32px;
  }

  /* Cart panel full width on mobile */
  .cart-panel {
    width: 100%;
  }
}

/* ═══════════════════════════════════════════════════════════════════
   ENTRANCE ANIMATION HELPERS
   ═══════════════════════════════════════════════════════════════════ */
.product-card {
  opacity: 0;
  transform: translateY(30px);
}

.product-card.in-view {
  opacity: 1;
  transform: translateY(0);
}

if (!window.MotionPreference) {
  const __mql = window.matchMedia("(prefers-reduced-motion: reduce)");
  const __listeners = new Set();

  const MotionPreference = {
    prefersReducedMotion() {
      return __mql.matches;
    },
    setOverride(value) {
      const reduced = Boolean(value);
      document.documentElement.classList.toggle("reduced-motion", reduced);
      window.dispatchEvent(new CustomEvent("motion-preference", { detail: { reduced } }));
      for (const listener of __listeners) {
        try {
          listener({ reduced, override: reduced, systemReduced: __mql.matches });
        } catch {}
      }
    },
    onChange(listener) {
      __listeners.add(listener);
      try {
        listener({
          reduced: __mql.matches,
          override: null,
          systemReduced: __mql.matches,
        });
      } catch {}
      return () => __listeners.delete(listener);
    },
    getState() {
      return { reduced: __mql.matches, override: null, systemReduced: __mql.matches };
    },
  };

  window.MotionPreference = MotionPreference;
}

function prefersReducedMotion() {
  return window.MotionPreference.prefersReducedMotion();
}

function initDemoShell() {
  // No-op shim in imported standalone snippets.
}

/* ═══════════════════════════════════════════════════════════════════
   E-commerce Shop — main.js
   Filterable product grid, FLIP animations, cart, View Transitions
   ═══════════════════════════════════════════════════════════════════ */

import gsap from "gsap";
import { ScrollTrigger } from "gsap/ScrollTrigger";
import { SplitText } from "gsap/SplitText";
import { Flip } from "gsap/Flip";
import Lenis from "lenis";

gsap.registerPlugin(ScrollTrigger, SplitText, Flip);

initDemoShell({
  title: "E-commerce Shop",
  category: "pages",
  tech: ["gsap", "flip", "lenis", "view-transitions-api"],
});

const lenis = new Lenis({ lerp: 0.1, smoothWheel: true });
lenis.on("scroll", ScrollTrigger.update);
gsap.ticker.add((time) => lenis.raf(time * 1000));
gsap.ticker.lagSmoothing(0);

let reduced = prefersReducedMotion();
if (reduced) document.documentElement.classList.add("reduced-motion");

window.addEventListener("motion-preference", (e) => {
  reduced = e.detail.reduced;
  document.documentElement.classList.toggle("reduced-motion", reduced);
  ScrollTrigger.refresh();
});

const dur = (d) => (reduced ? 0 : d);

/* ═══════════════════════════════════════════════════════════════════
   PRODUCT DATA
   ═══════════════════════════════════════════════════════════════════ */
const products = [
  {
    id: 1,
    name: "Merino Crew Neck",
    category: "apparel",
    price: 89,
    gradient: "grad-merino",
    shape: "shape-circle",
    description:
      "Crafted from ultra-fine 18-micron merino wool, this crew neck strikes the perfect balance between warmth and breathability. The relaxed fit drapes naturally over any frame, making it an effortless everyday layer.",
  },
  {
    id: 2,
    name: "Canvas Weekender",
    category: "accessories",
    price: 145,
    gradient: "grad-canvas",
    shape: "shape-rounded-sq",
    description:
      "Heavy-duty waxed canvas meets vegetable-tanned leather handles in a bag built for spontaneous getaways. The reinforced base and brass hardware ensure it ages beautifully over years of use.",
  },
  {
    id: 3,
    name: "Ceramic Pour-Over",
    category: "homeware",
    price: 42,
    gradient: "grad-ceramic",
    shape: "shape-abstract-a",
    description:
      "Hand-thrown stoneware dripper with a precision-cut spiral channel that controls water flow for consistent extraction. Each piece is kiln-fired with a reactive glaze that makes it one of a kind.",
  },
  {
    id: 4,
    name: "Linen Overshirt",
    category: "apparel",
    price: 128,
    gradient: "grad-linen",
    shape: "shape-rounded-sq",
    description:
      "Stonewashed European linen in a boxy silhouette that works as a light jacket or a structured shirt. The fabric softens with every wash while retaining its natural texture and drape.",
  },
  {
    id: 5,
    name: "Leather Card Wallet",
    category: "accessories",
    price: 55,
    gradient: "grad-leather",
    shape: "shape-abstract-b",
    description:
      "Slim enough to slip into a front pocket, this full-grain leather wallet holds up to six cards with a center cash slot. The burnished edges are hand-finished for a clean, modern profile.",
  },
  {
    id: 6,
    name: "Stoneware Mug Set",
    category: "homeware",
    price: 38,
    gradient: "grad-stoneware",
    shape: "shape-circle",
    description:
      "A set of two generously sized mugs in a matte volcanic glaze with a smooth interior. The thick walls retain heat longer, and the weighted base keeps them grounded on any surface.",
  },
  {
    id: 7,
    name: "Organic Cotton Tee",
    category: "apparel",
    price: 48,
    gradient: "grad-organic",
    shape: "shape-abstract-a",
    description:
      "GOTS-certified organic cotton in a medium weight that drapes without clinging. Pre-shrunk and garment-dyed for a broken-in feel straight out of the box with minimal environmental impact.",
  },
  {
    id: 8,
    name: "Brass Key Ring",
    category: "accessories",
    price: 28,
    gradient: "grad-brass",
    shape: "shape-circle",
    description:
      "Solid brass loop with a spring-loaded gate clip, designed to develop a rich patina with daily carry. The compact profile attaches cleanly to belt loops and bag hardware alike.",
  },
  {
    id: 9,
    name: "Linen Table Runner",
    category: "homeware",
    price: 65,
    gradient: "grad-runner",
    shape: "shape-rounded-sq",
    description:
      "Woven from raw Belgian flax with naturally frayed edges, this runner brings understated warmth to any table. The oatmeal tone pairs effortlessly with both ceramic and wooden tableware.",
  },
];

/* ═══════════════════════════════════════════════════════════════════
   HERO — SplitText word reveal
   ═══════════════════════════════════════════════════════════════════ */
const headlineEl = document.getElementById("hero-headline");

if (headlineEl) {
  const split = new SplitText(headlineEl, { type: "words", wordsClass: "word" });

  if (!reduced) {
    gsap.fromTo(
      split.words,
      { opacity: 0, y: 20 },
      {
        opacity: 1,
        y: 0,
        duration: 0.7,
        ease: "expo.out",
        stagger: 0.08,
        delay: 0.15,
      }
    );
  } else {
    gsap.set(split.words, { opacity: 1, y: 0 });
  }
}

/* ═══════════════════════════════════════════════════════════════════
   CARD ENTRANCE — ScrollTrigger stagger
   ═══════════════════════════════════════════════════════════════════ */
const cards = gsap.utils.toArray(".product-card");

if (!reduced) {
  gsap.fromTo(
    cards,
    { opacity: 0, y: 30 },
    {
      opacity: 1,
      y: 0,
      duration: 0.6,
      ease: "expo.out",
      stagger: 0.06,
      scrollTrigger: {
        trigger: "#product-grid",
        start: "top 85%",
      },
    }
  );
} else {
  gsap.set(cards, { opacity: 1, y: 0 });
}

/* ═══════════════════════════════════════════════════════════════════
   FILTER — GSAP Flip
   ═══════════════════════════════════════════════════════════════════ */
const filterNav = document.getElementById("filter-nav");
let activeFilter = "all";

function filterProducts(category) {
  if (category === activeFilter) return;
  activeFilter = category;

  // Update pill UI
  filterNav.querySelectorAll(".filter-pill").forEach((pill) => {
    pill.classList.toggle("active", pill.dataset.filter === category);
  });

  const state = Flip.getState(".product-card");

  document.querySelectorAll(".product-card").forEach((card) => {
    const show = category === "all" || card.dataset.category === category;
    card.style.display = show ? "" : "none";
  });

  if (!reduced) {
    Flip.from(state, {
      duration: 0.6,
      ease: "expo.inOut",
      stagger: 0.03,
      absolute: true,
      onComplete: () => ScrollTrigger.refresh(),
    });
  } else {
    ScrollTrigger.refresh();
  }
}

filterNav.addEventListener("click", (e) => {
  const pill = e.target.closest(".filter-pill");
  if (!pill) return;
  filterProducts(pill.dataset.filter);
});

/* ═══════════════════════════════════════════════════════════════════
   PRODUCT DETAIL — View Transitions API
   ═══════════════════════════════════════════════════════════════════ */
const supportsVT = typeof document.startViewTransition === "function";
const detailOverlay = document.getElementById("detail-overlay");
const detailImage = document.getElementById("detail-image");
const detailTitle = document.getElementById("detail-title");
const detailCategory = document.getElementById("detail-category");
const detailDesc = document.getElementById("detail-desc");
const detailPrice = document.getElementById("detail-price");
const detailAdd = document.getElementById("detail-add");
const detailClose = document.getElementById("detail-close");
const detailBackdrop = document.getElementById("detail-backdrop");
const qtyValue = document.getElementById("qty-value");
const qtyMinus = document.getElementById("qty-minus");
const qtyPlus = document.getElementById("qty-plus");

let activeProductId = null;
let activeCard = null;
let detailQty = 1;

function getProduct(id) {
  return products.find((p) => p.id === id);
}

function populateDetail(product) {
  // Set image gradient + shape class
  detailImage.className = "detail-image";
  detailImage.classList.add(product.gradient, product.shape);

  detailTitle.textContent = product.name;
  detailCategory.textContent = product.category;
  detailDesc.textContent = product.description;
  detailPrice.textContent = `$${product.price}`;

  detailQty = 1;
  qtyValue.textContent = detailQty;
  activeProductId = product.id;
}

function openDetail(card, product) {
  activeCard = card;
  populateDetail(product);

  const performOpen = () => {
    // Set view-transition-name on the active card only
    card.classList.add("vt-active");
    detailOverlay.classList.add("open");
    detailOverlay.setAttribute("aria-hidden", "false");
    document.body.style.overflow = "hidden";
    lenis.stop();
  };

  if (supportsVT && !reduced) {
    document.startViewTransition(() => performOpen());
  } else {
    performOpen();
  }
}

function closeDetail() {
  const performClose = () => {
    detailOverlay.classList.remove("open");
    detailOverlay.setAttribute("aria-hidden", "true");
    document.body.style.overflow = "";
    lenis.start();

    // Remove vt-active after transition completes
    if (activeCard) {
      activeCard.classList.remove("vt-active");
      activeCard = null;
    }
    activeProductId = null;
  };

  if (supportsVT && !reduced) {
    document.startViewTransition(() => performClose());
  } else {
    performClose();
  }
}

// Open on card click (but not on the Add to Cart button)
document.getElementById("product-grid").addEventListener("click", (e) => {
  const addBtn = e.target.closest(".btn-add");
  if (addBtn) {
    e.stopPropagation();
    addToCart(Number(addBtn.dataset.id));
    return;
  }

  const card = e.target.closest(".product-card");
  if (!card) return;

  const product = getProduct(Number(card.dataset.id));
  if (product) openDetail(card, product);
});

// Close triggers
detailClose.addEventListener("click", closeDetail);
detailBackdrop.addEventListener("click", closeDetail);
document.addEventListener("keydown", (e) => {
  if (e.key === "Escape") {
    if (detailOverlay.classList.contains("open")) {
      closeDetail();
    } else if (cartSidebar.classList.contains("open")) {
      closeCart();
    }
  }
});

// Quantity controls
qtyMinus.addEventListener("click", () => {
  if (detailQty > 1) {
    detailQty--;
    qtyValue.textContent = detailQty;
  }
});

qtyPlus.addEventListener("click", () => {
  if (detailQty < 99) {
    detailQty++;
    qtyValue.textContent = detailQty;
  }
});

// Add from detail view
detailAdd.addEventListener("click", () => {
  if (activeProductId) {
    for (let i = 0; i < detailQty; i++) {
      addToCart(activeProductId, true);
    }
    closeDetail();
  }
});

/* ═══════════════════════════════════════════════════════════════════
   CART STATE & UI
   ═══════════════════════════════════════════════════════════════════ */
let cart = [];

const cartSidebar = document.getElementById("cart-sidebar");
const cartPanel = document.getElementById("cart-panel");
const cartItems = document.getElementById("cart-items");
const cartEmpty = document.getElementById("cart-empty");
const cartBadge = document.getElementById("cart-badge");
const cartTotalValue = document.getElementById("cart-total-value");
const cartTrigger = document.getElementById("cart-trigger");
const cartClose = document.getElementById("cart-close");
const cartSidebarBackdrop = document.getElementById("cart-sidebar-backdrop");

function addToCart(productId, skipBounce = false) {
  const existing = cart.find((item) => item.id === productId);
  if (existing) {
    existing.qty++;
  } else {
    cart.push({ id: productId, qty: 1 });
  }
  updateCartUI();

  // Badge bounce
  if (!reduced && !skipBounce) {
    gsap.fromTo(cartBadge, { scale: 1.4 }, { scale: 1, duration: 0.3, ease: "back.out(2)" });
  }
}

function removeFromCart(productId) {
  cart = cart.filter((item) => item.id !== productId);
  updateCartUI();
}

function updateCartUI() {
  const totalItems = cart.reduce((sum, item) => sum + item.qty, 0);
  const totalPrice = cart.reduce((sum, item) => {
    const product = getProduct(item.id);
    return sum + (product ? product.price * item.qty : 0);
  }, 0);

  // Badge
  cartBadge.textContent = totalItems;
  cartBadge.classList.toggle("visible", totalItems > 0);

  // Total
  cartTotalValue.textContent = `$${totalPrice}`;

  // Items list
  if (cart.length === 0) {
    cartEmpty.style.display = "";
    // Clear all cart items
    cartItems.querySelectorAll(".cart-item").forEach((el) => el.remove());
    return;
  }

  cartEmpty.style.display = "none";

  // Rebuild items
  const existingItems = cartItems.querySelectorAll(".cart-item");
  existingItems.forEach((el) => el.remove());

  cart.forEach((item) => {
    const product = getProduct(item.id);
    if (!product) return;

    const row = document.createElement("div");
    row.className = "cart-item";
    row.innerHTML = `
      <div class="cart-item-swatch ${product.gradient}"></div>
      <div class="cart-item-details">
        <div class="cart-item-name">${product.name}</div>
        <div class="cart-item-meta">Qty: ${item.qty}</div>
      </div>
      <div class="cart-item-price">$${product.price * item.qty}</div>
      <button class="cart-item-remove" data-remove-id="${product.id}" aria-label="Remove ${product.name}">
        <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
          <line x1="18" y1="6" x2="6" y2="18"/>
          <line x1="6" y1="6" x2="18" y2="18"/>
        </svg>
      </button>
    `;
    cartItems.appendChild(row);
  });
}

// Cart item removal (delegated)
cartItems.addEventListener("click", (e) => {
  const removeBtn = e.target.closest(".cart-item-remove");
  if (!removeBtn) return;
  removeFromCart(Number(removeBtn.dataset.removeId));
});

/* ═══════════════════════════════════════════════════════════════════
   CART SIDEBAR OPEN / CLOSE
   ═══════════════════════════════════════════════════════════════════ */
function openCart() {
  cartSidebar.classList.add("open");
  cartSidebar.setAttribute("aria-hidden", "false");
  document.body.style.overflow = "hidden";
  lenis.stop();
}

function closeCart() {
  cartSidebar.classList.remove("open");
  cartSidebar.setAttribute("aria-hidden", "true");
  document.body.style.overflow = "";
  lenis.start();
}

cartTrigger.addEventListener("click", openCart);
cartClose.addEventListener("click", closeCart);
cartSidebarBackdrop.addEventListener("click", closeCart);

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>E-commerce Shop — stealthisdesign</title>
  <link rel="stylesheet" href="style.css">
    <script type="importmap">{"imports":{"gsap":"https://esm.sh/[email protected]","gsap/ScrollTrigger":"https://esm.sh/[email protected]/ScrollTrigger","gsap/SplitText":"https://esm.sh/[email protected]/SplitText","gsap/Flip":"https://esm.sh/[email protected]/Flip","gsap/ScrambleTextPlugin":"https://esm.sh/[email protected]/ScrambleTextPlugin","gsap/TextPlugin":"https://esm.sh/[email protected]/TextPlugin","gsap/all":"https://esm.sh/[email protected]/all","gsap/":"https://esm.sh/[email protected]/","lenis":"https://esm.sh/[email protected]/dist/lenis.mjs","three":"https://esm.sh/[email protected]","three/addons/":"https://esm.sh/[email protected]/examples/jsm/"}}</script>
  <style>html.lenis,
html.lenis body {
  height: auto;
}

.lenis:not(.lenis-autoToggle).lenis-stopped {
  overflow: clip;
}

.lenis [data-lenis-prevent],
.lenis [data-lenis-prevent-wheel],
.lenis [data-lenis-prevent-touch] {
  overscroll-behavior: contain;
}

.lenis.lenis-smooth iframe {
  pointer-events: none;
}

.lenis.lenis-autoToggle {
  transition-property: overflow;
  transition-duration: 1ms;
  transition-behavior: allow-discrete;
}</style>
</head>
<body>

  <!-- ═══════════════════════════════════════════════════════════════ -->
  <!-- STORE HEADER -->
  <!-- ═══════════════════════════════════════════════════════════════ -->
  <header class="store-header" id="store-header">
    <div class="header-inner">
      <a class="brand" href="#">Forma</a>
      <button class="cart-trigger" id="cart-trigger" aria-label="Open cart">
        <svg class="cart-icon" width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round">
          <path d="M6 2L3 6v14a2 2 0 002 2h14a2 2 0 002-2V6l-3-4z"/>
          <line x1="3" y1="6" x2="21" y2="6"/>
          <path d="M16 10a4 4 0 01-8 0"/>
        </svg>
        <span class="cart-badge" id="cart-badge" aria-live="polite">0</span>
      </button>
    </div>
    <nav class="filter-nav" id="filter-nav">
      <button class="filter-pill active" data-filter="all">All</button>
      <button class="filter-pill" data-filter="apparel">Apparel</button>
      <button class="filter-pill" data-filter="accessories">Accessories</button>
      <button class="filter-pill" data-filter="homeware">Homeware</button>
    </nav>
  </header>

  <!-- ═══════════════════════════════════════════════════════════════ -->
  <!-- HERO HEADLINE -->
  <!-- ═══════════════════════════════════════════════════════════════ -->
  <section class="hero-section" id="hero">
    <h1 class="hero-headline" id="hero-headline">Curated Essentials</h1>
    <p class="hero-sub">Thoughtfully designed goods for everyday living.</p>
  </section>

  <!-- ═══════════════════════════════════════════════════════════════ -->
  <!-- PRODUCT GRID -->
  <!-- ═══════════════════════════════════════════════════════════════ -->
  <section class="grid-section" id="grid-section">
    <div class="product-grid" id="product-grid">

      <article class="product-card" data-id="1" data-category="apparel">
        <div class="card-image shape-circle grad-merino" aria-hidden="true">
          <div class="shape-inner"></div>
        </div>
        <div class="card-body">
          <h3 class="card-title">Merino Crew Neck</h3>
          <span class="card-price">$89</span>
        </div>
        <button class="btn-add" data-id="1">Add to Cart</button>
      </article>

      <article class="product-card" data-id="2" data-category="accessories">
        <div class="card-image shape-rounded-sq grad-canvas" aria-hidden="true">
          <div class="shape-inner"></div>
        </div>
        <div class="card-body">
          <h3 class="card-title">Canvas Weekender</h3>
          <span class="card-price">$145</span>
        </div>
        <button class="btn-add" data-id="2">Add to Cart</button>
      </article>

      <article class="product-card" data-id="3" data-category="homeware">
        <div class="card-image shape-abstract-a grad-ceramic" aria-hidden="true">
          <div class="shape-inner"></div>
        </div>
        <div class="card-body">
          <h3 class="card-title">Ceramic Pour-Over</h3>
          <span class="card-price">$42</span>
        </div>
        <button class="btn-add" data-id="3">Add to Cart</button>
      </article>

      <article class="product-card" data-id="4" data-category="apparel">
        <div class="card-image shape-rounded-sq grad-linen" aria-hidden="true">
          <div class="shape-inner"></div>
        </div>
        <div class="card-body">
          <h3 class="card-title">Linen Overshirt</h3>
          <span class="card-price">$128</span>
        </div>
        <button class="btn-add" data-id="4">Add to Cart</button>
      </article>

      <article class="product-card" data-id="5" data-category="accessories">
        <div class="card-image shape-abstract-b grad-leather" aria-hidden="true">
          <div class="shape-inner"></div>
        </div>
        <div class="card-body">
          <h3 class="card-title">Leather Card Wallet</h3>
          <span class="card-price">$55</span>
        </div>
        <button class="btn-add" data-id="5">Add to Cart</button>
      </article>

      <article class="product-card" data-id="6" data-category="homeware">
        <div class="card-image shape-circle grad-stoneware" aria-hidden="true">
          <div class="shape-inner"></div>
        </div>
        <div class="card-body">
          <h3 class="card-title">Stoneware Mug Set</h3>
          <span class="card-price">$38</span>
        </div>
        <button class="btn-add" data-id="6">Add to Cart</button>
      </article>

      <article class="product-card" data-id="7" data-category="apparel">
        <div class="card-image shape-abstract-a grad-organic" aria-hidden="true">
          <div class="shape-inner"></div>
        </div>
        <div class="card-body">
          <h3 class="card-title">Organic Cotton Tee</h3>
          <span class="card-price">$48</span>
        </div>
        <button class="btn-add" data-id="7">Add to Cart</button>
      </article>

      <article class="product-card" data-id="8" data-category="accessories">
        <div class="card-image shape-circle grad-brass" aria-hidden="true">
          <div class="shape-inner"></div>
        </div>
        <div class="card-body">
          <h3 class="card-title">Brass Key Ring</h3>
          <span class="card-price">$28</span>
        </div>
        <button class="btn-add" data-id="8">Add to Cart</button>
      </article>

      <article class="product-card" data-id="9" data-category="homeware">
        <div class="card-image shape-rounded-sq grad-runner" aria-hidden="true">
          <div class="shape-inner"></div>
        </div>
        <div class="card-body">
          <h3 class="card-title">Linen Table Runner</h3>
          <span class="card-price">$65</span>
        </div>
        <button class="btn-add" data-id="9">Add to Cart</button>
      </article>

    </div>
  </section>

  <!-- ═══════════════════════════════════════════════════════════════ -->
  <!-- PRODUCT DETAIL OVERLAY -->
  <!-- ═══════════════════════════════════════════════════════════════ -->
  <div class="detail-overlay" id="detail-overlay" aria-hidden="true">
    <div class="detail-backdrop" id="detail-backdrop"></div>
    <div class="detail-panel" id="detail-panel">
      <button class="detail-close" id="detail-close" aria-label="Close detail view">
        <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
          <line x1="18" y1="6" x2="6" y2="18"/>
          <line x1="6" y1="6" x2="18" y2="18"/>
        </svg>
      </button>
      <div class="detail-image" id="detail-image" aria-hidden="true">
        <div class="shape-inner"></div>
      </div>
      <div class="detail-info">
        <h2 class="detail-title" id="detail-title"></h2>
        <p class="detail-category" id="detail-category"></p>
        <p class="detail-desc" id="detail-desc"></p>
        <span class="detail-price" id="detail-price"></span>
        <div class="qty-selector">
          <button class="qty-btn" id="qty-minus" aria-label="Decrease quantity">-</button>
          <span class="qty-value" id="qty-value">1</span>
          <button class="qty-btn" id="qty-plus" aria-label="Increase quantity">+</button>
        </div>
        <button class="btn-add-large" id="detail-add">Add to Cart</button>
      </div>
    </div>
  </div>

  <!-- ═══════════════════════════════════════════════════════════════ -->
  <!-- CART SIDEBAR -->
  <!-- ═══════════════════════════════════════════════════════════════ -->
  <aside class="cart-sidebar" id="cart-sidebar" aria-hidden="true">
    <div class="cart-sidebar-backdrop" id="cart-sidebar-backdrop"></div>
    <div class="cart-panel" id="cart-panel">
      <div class="cart-header">
        <h2 class="cart-heading">Your Cart</h2>
        <button class="cart-close" id="cart-close" aria-label="Close cart">
          <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
            <line x1="18" y1="6" x2="6" y2="18"/>
            <line x1="6" y1="6" x2="18" y2="18"/>
          </svg>
        </button>
      </div>
      <div class="cart-items" id="cart-items">
        <p class="cart-empty" id="cart-empty">Your cart is empty.</p>
      </div>
      <div class="cart-footer" id="cart-footer">
        <div class="cart-total">
          <span>Total</span>
          <span id="cart-total-value">$0</span>
        </div>
        <button class="btn-checkout">Checkout</button>
      </div>
    </div>
  </aside>

  <script type="module" src="script.js"></script>
</body>
</html>