/* ==========================================================================
   YOLYSSE DESIGN SYSTEM v2.0
   Professional, Scalable, Vanilla CSS Architecture
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Variables (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
  /* Core Dark Mode Colors (Default) */
  --bg-primary:           #0D0D0D;
  --bg-surface:           #141414;
  --bg-elevated:          #1C1A17;
  
  --gold:                 #C9A07A;
  --gold-dim:             #8A6D52;
  --gold-hover:           #D9B48E;
  --gold-active:          #B88A5F;
  --gold-subtle:          rgba(201, 160, 122, 0.10);
  
  --text-primary:         #F5F0E8;
  --text-secondary:       #A89F94;
  --text-muted:           #5C5650;
  --text-inverse:         #0D0D0D;
  
  --border:               #252525;
  --border-hover:         #3A3530;
  
  --success:              #6B9E7A;
  --error:                #C97A7A;
  --warning:              #C9A07A;
  --info:                 #7A9EC9;

  /* Spacing Scale (8px base) */
  --space-xs:             4px;
  --space-sm:             8px;
  --space-md:             16px;
  --space-lg:             24px;
  --space-xl:             32px;
  --space-2xl:            48px;
  --space-3xl:            64px;
  --space-4xl:            96px;
  --space-5xl:            128px;

  /* Typography */
  --font-display:         'Playfair Display', serif;
  --font-body:            'Inter', sans-serif;
  
  /* Radii & Borders */
  --radius-sm:            2px;
  --radius-md:            2px; /* Spec strictly enforces 2px */
  --radius-lg:            2px;
  --radius-full:          50%;
  --border-width:         1px;

  /* Z-Index Scale */
  --z-base:               1;
  --z-nav:                100;
  --z-drawer:             200;
  --z-overlay:            300;
  --z-modal:              400;
  --z-toast:              500;

  /* Transitions */
  --transition-fast:      150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal:    250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow:      350ms cubic-bezier(0.4, 0, 0.2, 1);
}

body.light-mode {
  /* Core Light Mode Colors */
  --bg-primary:           #F9F8F6;
  --bg-surface:           #FFFFFF;
  --bg-elevated:          #F0EBE1;
  
  --gold:                 #B07F52;
  --gold-dim:             #8A6D52;
  --gold-hover:           #9A6B42;
  --gold-active:          #855C38;
  --gold-subtle:          rgba(176, 127, 82, 0.10);
  
  --text-primary:         #1A1816;
  --text-secondary:       #4A4540;
  --text-muted:           #8C847A;
  --text-inverse:         #FFFFFF;
  
  --border:               #E6DFD5;
  --border-hover:         #C2B8AA;
}

/* --------------------------------------------------------------------------
   2. Reset & Base Styles
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

/* Hide scrollbar for clean aesthetics */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: var(--radius-sm);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--gold-dim);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

img, svg {
  display: block;
  max-width: 100%;
}

input, select, textarea {
  font: inherit;
  color: inherit;
}

/* --------------------------------------------------------------------------
   3. Typography Utilities
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.1;
  color: var(--text-primary);
}

.text-hero { font-size: clamp(36px, 5vw, 64px); }
.text-h1 { font-size: clamp(32px, 4vw, 48px); }
.text-h2 { font-size: clamp(28px, 3vw, 40px); }
.text-h3 { font-size: clamp(24px, 2.5vw, 32px); }
.text-h4 { font-size: clamp(20px, 2vw, 24px); }

.text-body-lg { font-size: 16px; line-height: 1.6; }
.text-body { font-size: 14px; line-height: 1.75; }
.text-body-sm { font-size: 12px; line-height: 1.5; }
.text-caption { font-size: 10px; line-height: 1.4; letter-spacing: 0.08em; }

.title-italic { font-style: italic; }
.text-caps {
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.12em;
  font-weight: 500;
}
.text-gold { color: var(--gold); }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* --------------------------------------------------------------------------
   4. Layout & Spacing Utilities
   -------------------------------------------------------------------------- */
.container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 var(--space-2xl);
}
@media (max-width: 1024px) {
  .container { padding: 0 28px; }
}
@media (max-width: 640px) {
  .container { padding: 0 20px; }
}

.container-sm {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--space-2xl);
}

.d-flex { display: flex; }
.d-grid { display: grid; }
.d-block { display: block; }
.d-none { display: none; }

.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.align-center { align-items: center; }
.align-start { align-items: flex-start; }
.align-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.flex-1 { flex: 1; }

.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

.w-100 { width: 100%; }
.h-100 { height: 100%; }
.h-screen { height: 100vh; }

.m-0 { margin: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }
.mt-3xl { margin-top: var(--space-3xl); }
.mt-4xl { margin-top: var(--space-4xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }
.mb-3xl { margin-bottom: var(--space-3xl); }
.mb-4xl { margin-bottom: var(--space-4xl); }

.py-xl { padding-top: var(--space-xl); padding-bottom: var(--space-xl); }
.py-2xl { padding-top: var(--space-2xl); padding-bottom: var(--space-2xl); }
.py-3xl { padding-top: var(--space-3xl); padding-bottom: var(--space-3xl); }
.py-4xl { padding-top: var(--space-4xl); padding-bottom: var(--space-4xl); }

/* --------------------------------------------------------------------------
   5. Global Components
   -------------------------------------------------------------------------- */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  padding: 16px 28px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  cursor: pointer;
  text-align: center;
}
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background: var(--gold);
  color: var(--text-inverse);
  border: 1px solid var(--gold);
}
.btn-primary:hover, .btn-primary:focus-visible {
  background: var(--gold-hover);
  border-color: var(--gold-hover);
}
.btn-primary:active {
  background: var(--gold-active);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover, .btn-secondary:focus-visible {
  border-color: var(--gold-dim);
  color: var(--text-primary);
}

.btn-ghost {
  background: transparent;
  color: var(--gold);
  border: none;
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 4px;
}
.btn-ghost:hover {
  color: var(--gold-hover);
}

.btn-icon {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}
.btn-icon:hover {
  color: var(--gold);
}
.btn-icon.bordered {
  width: 52px; height: 52px;
  border: 1px solid var(--border);
}
.btn-icon.bordered:hover {
  border-color: var(--gold);
}
.btn-icon svg {
  width: 18px; height: 18px;
  stroke-width: 1.5;
  fill: none;
  stroke: currentColor;
}

/* Inputs & Forms */
.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  width: 100%;
}
.input-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-secondary);
}
.input-field {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  outline: none;
  width: 100%;
  font-size: 14px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.input-field:focus {
  border-color: var(--gold);
}
.input-field::placeholder {
  color: var(--text-muted);
}
textarea.input-field {
  resize: vertical;
  min-height: 100px;
}

/* Pills & Selectors */
.selector-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}
.selector-pill, .selector-box {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 12px;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}
.selector-pill { padding: 10px 16px; }
.selector-box { width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; }

.selector-pill:hover, .selector-box:hover {
  border-color: var(--border-hover);
  color: var(--text-secondary);
}
.selector-pill.active, .selector-box.active {
  border-color: var(--gold);
  color: var(--text-primary);
  background: var(--bg-elevated);
}
.selector-pill:disabled, .selector-box:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  text-decoration: line-through;
}

/* --------------------------------------------------------------------------
   6. Navigation & Footer
   -------------------------------------------------------------------------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-2xl);
  z-index: var(--z-nav);
  border-bottom: 1px solid var(--border);
  background: var(--bg-primary);
  backdrop-filter: blur(12px);
  transition: background var(--transition-normal), border-color var(--transition-normal), transform var(--transition-normal);
}
.navbar.transparent {
  background: transparent;
  border-bottom-color: transparent;
  backdrop-filter: none;
}
.navbar.hidden {
  transform: translateY(-100%);
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 22px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.nav-links {
  display: flex;
  gap: var(--space-lg);
}
.nav-links a {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  position: relative;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--text-primary);
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1px;
  background: var(--gold);
  transition: width var(--transition-normal);
}
.nav-links a:hover::after, .nav-links a.active::after {
  width: 100%;
}

.nav-icons {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}
.cart-wrapper { position: relative; }
.cart-badge {
  position: absolute;
  top: 4px; right: 4px;
  background: var(--gold);
  color: var(--text-inverse);
  font-size: 9px;
  font-weight: 600;
  width: 16px; height: 16px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

@media (max-width: 1024px) {
  .navbar { padding: 0 20px; }
  .nav-links { display: none; }
}

/* Mobile Drawer */
.mobile-menu-btn { display: none; }
@media (max-width: 1024px) {
  .mobile-menu-btn { display: inline-flex; }
}

.drawer-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.6);
  z-index: var(--z-overlay);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}
.drawer-overlay.active {
  opacity: 1;
  visibility: visible;
}
.drawer-content {
  position: fixed;
  top: 0; right: 0; bottom: 0;
  width: 100%;
  max-width: 400px;
  background: var(--bg-primary);
  z-index: var(--z-drawer);
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  display: flex;
  flex-direction: column;
}
.drawer-content.active {
  transform: translateX(0);
}
.drawer-header {
  padding: 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.drawer-body {
  padding: 24px;
  flex: 1;
  overflow-y: auto;
}
.drawer-nav-links {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.drawer-nav-links a {
  font-size: 20px;
  font-family: var(--font-display);
  color: var(--text-primary);
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding-top: 64px;
  margin-top: 64px;
  background: var(--bg-surface);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1.5fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand p { color: var(--text-secondary); margin-top: 16px; }
.footer-links ul { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.footer-links a { color: var(--text-secondary); }
.footer-links a:hover { color: var(--text-primary); }
.newsletter-form { display: flex; gap: 8px; margin-top: 16px; }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 12px;
}
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
  .newsletter-form { flex-direction: column; }
}

/* --------------------------------------------------------------------------
   7. Complex Components
   -------------------------------------------------------------------------- */

/* Product Card */
.product-card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  position: relative;
  transition: transform var(--transition-normal);
  cursor: pointer;
  height: 100%;
}
.product-card:hover {
  transform: translateY(-4px);
}
.product-image-container {
  aspect-ratio: 4/5;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  position: relative;
  overflow: hidden;
  margin-bottom: 16px;
  transition: border-color var(--transition-fast);
}
.product-card:hover .product-image-container {
  border-color: var(--gold-dim);
}
.product-image {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  transition: opacity var(--transition-slow), transform 3s ease;
}
.product-image.img-secondary {
  opacity: 0;
}
.product-card:hover .product-image.img-secondary {
  opacity: 1;
  transform: scale(1.05); /* Subtle zoom on hover */
}
.product-card:hover .product-image.img-primary {
  opacity: 0;
}

.product-wishlist-btn {
  position: absolute;
  top: 8px; right: 8px;
  width: 36px; height: 36px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  opacity: 0;
  transition: all var(--transition-fast);
  z-index: 10;
  color: var(--text-muted);
}
.product-card:hover .product-wishlist-btn { opacity: 1; }
.product-wishlist-btn:hover, .product-wishlist-btn.active {
  border-color: var(--gold);
  color: var(--gold);
}
.product-wishlist-btn svg {
  width: 16px; height: 16px;
  stroke: currentColor;
  stroke-width: 1.5;
  fill: none;
  transition: fill var(--transition-fast);
}
.product-wishlist-btn.active svg {
  fill: var(--gold);
}

.product-badge {
  position: absolute;
  top: 8px; left: 8px;
  font-family: var(--font-body);
  font-size: 10px;
  text-transform: uppercase;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  z-index: 10;
  font-weight: 500;
  letter-spacing: 0.05em;
}
.product-badge.new { background: var(--gold); color: var(--text-inverse); }
.product-badge.sale { background: var(--error); color: #FFF; }

.product-name {
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.product-price-block {
  display: flex;
  align-items: center;
  gap: 8px;
}
.product-price {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 500;
  color: var(--gold);
}
.product-price-orig {
  font-family: var(--font-display);
  font-size: 14px;
  color: var(--text-muted);
  text-decoration: line-through;
}

/* Accordion */
.accordion {
  border-top: 1px solid var(--border);
}
.accordion-item {
  border-bottom: 1px solid var(--border);
}
.accordion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}
.accordion-header:hover { color: var(--gold); }
.accordion-icon {
  transition: transform var(--transition-normal);
  color: var(--text-muted);
}
.accordion-item.active .accordion-icon {
  transform: rotate(45deg);
  color: var(--text-primary);
}
.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
  color: var(--text-secondary);
  font-size: 14px;
}
.accordion-content-inner {
  padding-bottom: 20px;
}

/* Trust Bar */
.trust-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
}
.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 16px 8px;
  text-align: center;
  border-right: 1px solid var(--border);
}
.trust-item:last-child { border-right: none; }
.trust-item svg { color: var(--gold); width: 20px; height: 20px; margin-bottom: 8px; }
.trust-item span { font-size: 10px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
@media (max-width: 640px) {
  .trust-bar { grid-template-columns: repeat(2, 1fr); }
  .trust-item:nth-child(2) { border-right: none; }
  .trust-item:nth-child(1), .trust-item:nth-child(2) { border-bottom: 1px solid var(--border); }
}

/* Toast Notifications */
#toast-root {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: 12px;
  pointer-events: none;
}
.toast-notification {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 24px;
  font-size: 14px;
  display: flex;
  align-items: center;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  transform: translateX(120%);
  transition: transform var(--transition-normal);
  pointer-events: auto;
}
.toast-notification.show {
  transform: translateX(0);
}
body.light-mode .toast-notification {
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.8);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  padding: 20px;
}
.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}
.modal-content {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(20px);
  transition: transform var(--transition-normal);
  position: relative;
}
.modal-overlay.active .modal-content {
  transform: translateY(0);
}
.modal-close {
  position: absolute;
  top: 16px; right: 16px;
  z-index: 10;
}

/* Skeletons */
@keyframes pulse {
  0% { opacity: 0.4; }
  50% { opacity: 0.8; }
  100% { opacity: 0.4; }
}
.skeleton {
  background: var(--bg-elevated);
  animation: pulse 1.5s infinite ease-in-out;
  border-radius: var(--radius-sm);
}

/* --------------------------------------------------------------------------
   8. Specific Page Layouts
   -------------------------------------------------------------------------- */

/* Home Hero */
.hero-wrapper {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-size: cover;
  background-position: center 20%;
  z-index: 0;
  transform: scale(1.05);
  animation: slowZoom 20s linear infinite alternate;
}
@keyframes slowZoom {
  from { transform: scale(1.0); }
  to { transform: scale(1.1); }
}
.hero-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(90deg, rgba(13,13,13,0.9) 0%, rgba(13,13,13,0.6) 50%, transparent 100%);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 600px;
  color: #F5F0E8; /* Enforce light text on hero regardless of theme */
}
.hero-content .text-muted { color: #A89F94; }

/* Grid Layouts */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.grid-5 { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }

@media (max-width: 1024px) {
  .grid-4, .grid-5 { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
  .grid-3, .grid-4, .grid-5 { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .grid-3, .grid-4, .grid-5 { grid-template-columns: repeat(2, 1fr); gap: 12px; }
}

/* Horizontal Scroller (Categories & Bestsellers) */
.scroller-container {
  margin-right: calc(var(--space-2xl) * -1);
  padding-right: var(--space-2xl);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none; /* Firefox */
}
.scroller-container::-webkit-scrollbar { display: none; }
.scroller-inner {
  display: flex;
  gap: 20px;
  padding-bottom: 24px;
}
.scroller-item {
  flex: 0 0 280px;
  scroll-snap-align: start;
}
.scroller-item.category {
  flex: 0 0 200px;
}
@media (max-width: 640px) {
  .scroller-container { margin-right: -20px; padding-right: 20px; }
  .scroller-item { flex: 0 0 220px; }
  .scroller-item.category { flex: 0 0 140px; }
}
.category-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  cursor: pointer;
}
.category-img {
  width: 100%;
  aspect-ratio: 1/1;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}
.category-img img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--transition-normal); }
.category-card:hover .category-img { border-color: var(--gold); }
.category-card:hover img { transform: scale(1.05); }

/* Shop Page */
.shop-layout {
  display: flex;
  flex-direction: column;
}
.shop-filters {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border);
  padding-bottom: 16px;
}
@media (max-width: 768px) {
  .shop-filters { flex-direction: column; align-items: flex-start; gap: 16px; }
}
.filter-tags {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}
.filter-tags::-webkit-scrollbar { display: none; }
.filter-tag {
  padding: 8px 16px;
  border-radius: 99px; /* Tags can be pills even if cards are square */
  border: 1px solid var(--border);
  font-size: 12px;
  white-space: nowrap;
  cursor: pointer;
  background: var(--bg-surface);
  transition: all var(--transition-fast);
}
.filter-tag.active {
  background: var(--gold);
  color: var(--text-inverse);
  border-color: var(--gold);
}

/* Product Detail Page */
.pdp-layout {
  display: flex;
  gap: 64px;
}
.pdp-gallery {
  flex: 1;
  position: sticky;
  top: 100px;
  height: fit-content;
}
.pdp-info {
  flex: 1;
  max-width: 500px;
}
.pdp-main-img-wrap {
  aspect-ratio: 4/5;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  position: relative;
  cursor: zoom-in;
}
.pdp-main-img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.2s ease-out;
}
.pdp-thumbs {
  display: flex;
  gap: 12px;
  margin-top: 12px;
}
.pdp-thumb {
  width: calc(25% - 9px);
  aspect-ratio: 1/1;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  overflow: hidden;
}
.pdp-thumb.active { border-color: var(--gold); }
.pdp-thumb img { width: 100%; height: 100%; object-fit: cover; }

@media (max-width: 768px) {
  .pdp-layout { flex-direction: column; gap: 32px; }
  .pdp-gallery { position: relative; top: 0; }
  .pdp-info { max-width: 100%; }
}

.review-stars { color: var(--gold); letter-spacing: 2px; }

/* Cart Drawer */
.cart-drawer {
  position: fixed;
  top: 0; right: 0; bottom: 0;
  width: 100%; max-width: 450px;
  background: var(--bg-primary);
  border-left: 1px solid var(--border);
  z-index: var(--z-drawer);
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  display: flex;
  flex-direction: column;
}
.cart-drawer.active { transform: translateX(0); }
.cart-header {
  padding: 24px;
  border-bottom: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
}
.cart-body {
  flex: 1; overflow-y: auto; padding: 24px;
}
.cart-footer {
  padding: 24px;
  border-top: 1px solid var(--border);
  background: var(--bg-surface);
}
.cart-item {
  display: flex; gap: 16px; margin-bottom: 24px;
}
.cart-item-img {
  width: 80px; height: 100px;
  object-fit: cover;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}
.qty-btn {
  width: 28px; height: 28px;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-surface);
  cursor: pointer;
}
.qty-btn:hover { border-color: var(--gold); color: var(--gold); }

/* Checkout Layout */
.checkout-layout {
  display: flex;
  gap: 64px;
}
.checkout-steps { flex: 1; }
.checkout-summary {
  width: 400px;
  background: var(--bg-surface);
  padding: 32px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  height: fit-content;
  position: sticky;
  top: 100px;
}
.checkout-step {
  border-bottom: 1px solid var(--border);
  padding: 32px 0;
}
.checkout-step.inactive { opacity: 0.5; pointer-events: none; }
@media (max-width: 1024px) {
  .checkout-layout { flex-direction: column-reverse; }
  .checkout-summary { width: 100%; position: relative; top: 0; }
}

/* Animations */
.page-enter {
  animation: pageFadeIn 0.4s ease-out forwards;
}
@keyframes pageFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Mobile Sticky CTA */
.mobile-sticky-cta {
  display: none;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  padding: 16px 20px;
  background: var(--bg-primary);
  border-top: 1px solid var(--border);
  z-index: var(--z-nav);
  box-shadow: 0 -4px 20px rgba(0,0,0,0.1);
}
@media (max-width: 768px) {
  .mobile-sticky-cta.visible { display: block; }
}

/* Image Zoom Logic Helper Class */
.zoomed-image-cursor {
  cursor: zoom-in;
}
.zoomed-image-active {
  cursor: zoom-out;
}

/* --------------------------------------------------------------------------
   9. Extensive Utility System
   Professional vanilla alternative to Tailwind for rapid scaling
   -------------------------------------------------------------------------- */

/* Displays */
.d-flex { display: flex !important; }
.d-inline-flex { display: inline-flex !important; }
.d-grid { display: grid !important; }
.d-block { display: block !important; }
.d-inline-block { display: inline-block !important; }
.d-none { display: none !important; }

/* Flexbox Alignments */
.flex-row { flex-direction: row !important; }
.flex-col { flex-direction: column !important; }
.flex-wrap { flex-wrap: wrap !important; }
.flex-nowrap { flex-wrap: nowrap !important; }

.items-start { align-items: flex-start !important; }
.items-end { align-items: flex-end !important; }
.items-center { align-items: center !important; }
.items-baseline { align-items: baseline !important; }
.items-stretch { align-items: stretch !important; }

.justify-start { justify-content: flex-start !important; }
.justify-end { justify-content: flex-end !important; }
.justify-center { justify-content: center !important; }
.justify-between { justify-content: space-between !important; }
.justify-around { justify-content: space-around !important; }
.justify-evenly { justify-content: space-evenly !important; }

.flex-1 { flex: 1 1 0% !important; }
.flex-auto { flex: 1 1 auto !important; }
.flex-initial { flex: 0 1 auto !important; }
.flex-none { flex: none !important; }

/* Sizing */
.w-10 { width: 10% !important; }
.w-20 { width: 20% !important; }
.w-25 { width: 25% !important; }
.w-30 { width: 30% !important; }
.w-33 { width: 33.333333% !important; }
.w-40 { width: 40% !important; }
.w-50 { width: 50% !important; }
.w-60 { width: 60% !important; }
.w-66 { width: 66.666667% !important; }
.w-70 { width: 70% !important; }
.w-75 { width: 75% !important; }
.w-80 { width: 80% !important; }
.w-90 { width: 90% !important; }
.w-100 { width: 100% !important; }
.w-auto { width: auto !important; }
.w-screen { width: 100vw !important; }

.h-100 { height: 100% !important; }
.h-auto { height: auto !important; }
.h-screen { height: 100vh !important; }

/* Positioning */
.relative { position: relative !important; }
.absolute { position: absolute !important; }
.fixed { position: fixed !important; }
.sticky { position: sticky !important; }

.top-0 { top: 0 !important; }
.right-0 { right: 0 !important; }
.bottom-0 { bottom: 0 !important; }
.left-0 { left: 0 !important; }
.inset-0 { top: 0; right: 0; bottom: 0; left: 0 !important; }

.z-0 { z-index: 0 !important; }
.z-10 { z-index: 10 !important; }
.z-20 { z-index: 20 !important; }
.z-30 { z-index: 30 !important; }
.z-40 { z-index: 40 !important; }
.z-50 { z-index: 50 !important; }

/* Typography Helpers */
.text-left { text-align: left !important; }
.text-center { text-align: center !important; }
.text-right { text-align: right !important; }
.text-justify { text-align: justify !important; }

.font-normal { font-weight: 400 !important; }
.font-medium { font-weight: 500 !important; }
.font-semibold { font-weight: 600 !important; }
.font-bold { font-weight: 700 !important; }

.italic { font-style: italic !important; }
.uppercase { text-transform: uppercase !important; }
.lowercase { text-transform: lowercase !important; }
.capitalize { text-transform: capitalize !important; }
.normal-case { text-transform: none !important; }

.underline { text-decoration: underline !important; }
.line-through { text-decoration: line-through !important; }
.no-underline { text-decoration: none !important; }

/* Colors (Text) */
.text-white { color: #FFFFFF !important; }
.text-black { color: #000000 !important; }
.text-transparent { color: transparent !important; }

/* Colors (Backgrounds) */
.bg-transparent { background-color: transparent !important; }
.bg-white { background-color: #FFFFFF !important; }
.bg-black { background-color: #000000 !important; }

/* Margins */
.m-0 { margin: 0 !important; }
.mt-0 { margin-top: 0 !important; }
.mr-0 { margin-right: 0 !important; }
.mb-0 { margin-bottom: 0 !important; }
.ml-0 { margin-left: 0 !important; }
.mx-0 { margin-left: 0 !important; margin-right: 0 !important; }
.my-0 { margin-top: 0 !important; margin-bottom: 0 !important; }

.m-xs { margin: var(--space-xs) !important; }
.mt-xs { margin-top: var(--space-xs) !important; }
.mr-xs { margin-right: var(--space-xs) !important; }
.mb-xs { margin-bottom: var(--space-xs) !important; }
.ml-xs { margin-left: var(--space-xs) !important; }
.mx-xs { margin-left: var(--space-xs) !important; margin-right: var(--space-xs) !important; }
.my-xs { margin-top: var(--space-xs) !important; margin-bottom: var(--space-xs) !important; }

.m-sm { margin: var(--space-sm) !important; }
.mt-sm { margin-top: var(--space-sm) !important; }
.mr-sm { margin-right: var(--space-sm) !important; }
.mb-sm { margin-bottom: var(--space-sm) !important; }
.ml-sm { margin-left: var(--space-sm) !important; }
.mx-sm { margin-left: var(--space-sm) !important; margin-right: var(--space-sm) !important; }
.my-sm { margin-top: var(--space-sm) !important; margin-bottom: var(--space-sm) !important; }

.m-md { margin: var(--space-md) !important; }
.mt-md { margin-top: var(--space-md) !important; }
.mr-md { margin-right: var(--space-md) !important; }
.mb-md { margin-bottom: var(--space-md) !important; }
.ml-md { margin-left: var(--space-md) !important; }
.mx-md { margin-left: var(--space-md) !important; margin-right: var(--space-md) !important; }
.my-md { margin-top: var(--space-md) !important; margin-bottom: var(--space-md) !important; }

.m-lg { margin: var(--space-lg) !important; }
.mt-lg { margin-top: var(--space-lg) !important; }
.mr-lg { margin-right: var(--space-lg) !important; }
.mb-lg { margin-bottom: var(--space-lg) !important; }
.ml-lg { margin-left: var(--space-lg) !important; }
.mx-lg { margin-left: var(--space-lg) !important; margin-right: var(--space-lg) !important; }
.my-lg { margin-top: var(--space-lg) !important; margin-bottom: var(--space-lg) !important; }

.m-xl { margin: var(--space-xl) !important; }
.mt-xl { margin-top: var(--space-xl) !important; }
.mr-xl { margin-right: var(--space-xl) !important; }
.mb-xl { margin-bottom: var(--space-xl) !important; }
.ml-xl { margin-left: var(--space-xl) !important; }
.mx-xl { margin-left: var(--space-xl) !important; margin-right: var(--space-xl) !important; }
.my-xl { margin-top: var(--space-xl) !important; margin-bottom: var(--space-xl) !important; }

.m-2xl { margin: var(--space-2xl) !important; }
.mt-2xl { margin-top: var(--space-2xl) !important; }
.mr-2xl { margin-right: var(--space-2xl) !important; }
.mb-2xl { margin-bottom: var(--space-2xl) !important; }
.ml-2xl { margin-left: var(--space-2xl) !important; }
.mx-2xl { margin-left: var(--space-2xl) !important; margin-right: var(--space-2xl) !important; }
.my-2xl { margin-top: var(--space-2xl) !important; margin-bottom: var(--space-2xl) !important; }

.m-3xl { margin: var(--space-3xl) !important; }
.mt-3xl { margin-top: var(--space-3xl) !important; }
.mr-3xl { margin-right: var(--space-3xl) !important; }
.mb-3xl { margin-bottom: var(--space-3xl) !important; }
.ml-3xl { margin-left: var(--space-3xl) !important; }
.mx-3xl { margin-left: var(--space-3xl) !important; margin-right: var(--space-3xl) !important; }
.my-3xl { margin-top: var(--space-3xl) !important; margin-bottom: var(--space-3xl) !important; }

.m-4xl { margin: var(--space-4xl) !important; }
.mt-4xl { margin-top: var(--space-4xl) !important; }
.mr-4xl { margin-right: var(--space-4xl) !important; }
.mb-4xl { margin-bottom: var(--space-4xl) !important; }
.ml-4xl { margin-left: var(--space-4xl) !important; }
.mx-4xl { margin-left: var(--space-4xl) !important; margin-right: var(--space-4xl) !important; }
.my-4xl { margin-top: var(--space-4xl) !important; margin-bottom: var(--space-4xl) !important; }

.m-auto { margin: auto !important; }
.mx-auto { margin-left: auto !important; margin-right: auto !important; }
.my-auto { margin-top: auto !important; margin-bottom: auto !important; }

/* Paddings */
.p-0 { padding: 0 !important; }
.pt-0 { padding-top: 0 !important; }
.pr-0 { padding-right: 0 !important; }
.pb-0 { padding-bottom: 0 !important; }
.pl-0 { padding-left: 0 !important; }
.px-0 { padding-left: 0 !important; padding-right: 0 !important; }
.py-0 { padding-top: 0 !important; padding-bottom: 0 !important; }

.p-xs { padding: var(--space-xs) !important; }
.pt-xs { padding-top: var(--space-xs) !important; }
.pr-xs { padding-right: var(--space-xs) !important; }
.pb-xs { padding-bottom: var(--space-xs) !important; }
.pl-xs { padding-left: var(--space-xs) !important; }
.px-xs { padding-left: var(--space-xs) !important; padding-right: var(--space-xs) !important; }
.py-xs { padding-top: var(--space-xs) !important; padding-bottom: var(--space-xs) !important; }

.p-sm { padding: var(--space-sm) !important; }
.pt-sm { padding-top: var(--space-sm) !important; }
.pr-sm { padding-right: var(--space-sm) !important; }
.pb-sm { padding-bottom: var(--space-sm) !important; }
.pl-sm { padding-left: var(--space-sm) !important; }
.px-sm { padding-left: var(--space-sm) !important; padding-right: var(--space-sm) !important; }
.py-sm { padding-top: var(--space-sm) !important; padding-bottom: var(--space-sm) !important; }

.p-md { padding: var(--space-md) !important; }
.pt-md { padding-top: var(--space-md) !important; }
.pr-md { padding-right: var(--space-md) !important; }
.pb-md { padding-bottom: var(--space-md) !important; }
.pl-md { padding-left: var(--space-md) !important; }
.px-md { padding-left: var(--space-md) !important; padding-right: var(--space-md) !important; }
.py-md { padding-top: var(--space-md) !important; padding-bottom: var(--space-md) !important; }

.p-lg { padding: var(--space-lg) !important; }
.pt-lg { padding-top: var(--space-lg) !important; }
.pr-lg { padding-right: var(--space-lg) !important; }
.pb-lg { padding-bottom: var(--space-lg) !important; }
.pl-lg { padding-left: var(--space-lg) !important; }
.px-lg { padding-left: var(--space-lg) !important; padding-right: var(--space-lg) !important; }
.py-lg { padding-top: var(--space-lg) !important; padding-bottom: var(--space-lg) !important; }

.p-xl { padding: var(--space-xl) !important; }
.pt-xl { padding-top: var(--space-xl) !important; }
.pr-xl { padding-right: var(--space-xl) !important; }
.pb-xl { padding-bottom: var(--space-xl) !important; }
.pl-xl { padding-left: var(--space-xl) !important; }
.px-xl { padding-left: var(--space-xl) !important; padding-right: var(--space-xl) !important; }
.py-xl { padding-top: var(--space-xl) !important; padding-bottom: var(--space-xl) !important; }

.p-2xl { padding: var(--space-2xl) !important; }
.pt-2xl { padding-top: var(--space-2xl) !important; }
.pr-2xl { padding-right: var(--space-2xl) !important; }
.pb-2xl { padding-bottom: var(--space-2xl) !important; }
.pl-2xl { padding-left: var(--space-2xl) !important; }
.px-2xl { padding-left: var(--space-2xl) !important; padding-right: var(--space-2xl) !important; }
.py-2xl { padding-top: var(--space-2xl) !important; padding-bottom: var(--space-2xl) !important; }

.p-3xl { padding: var(--space-3xl) !important; }
.pt-3xl { padding-top: var(--space-3xl) !important; }
.pr-3xl { padding-right: var(--space-3xl) !important; }
.pb-3xl { padding-bottom: var(--space-3xl) !important; }
.pl-3xl { padding-left: var(--space-3xl) !important; }
.px-3xl { padding-left: var(--space-3xl) !important; padding-right: var(--space-3xl) !important; }
.py-3xl { padding-top: var(--space-3xl) !important; padding-bottom: var(--space-3xl) !important; }

.p-4xl { padding: var(--space-4xl) !important; }
.pt-4xl { padding-top: var(--space-4xl) !important; }
.pr-4xl { padding-right: var(--space-4xl) !important; }
.pb-4xl { padding-bottom: var(--space-4xl) !important; }
.pl-4xl { padding-left: var(--space-4xl) !important; }
.px-4xl { padding-left: var(--space-4xl) !important; padding-right: var(--space-4xl) !important; }
.py-4xl { padding-top: var(--space-4xl) !important; padding-bottom: var(--space-4xl) !important; }

/* Responsive Overrides */
@media (min-width: 640px) {
  .sm-d-none { display: none !important; }
  .sm-d-block { display: block !important; }
  .sm-d-flex { display: flex !important; }
  .sm-d-grid { display: grid !important; }
  .sm-w-50 { width: 50% !important; }
  .sm-w-100 { width: 100% !important; }
}

@media (min-width: 768px) {
  .md-d-none { display: none !important; }
  .md-d-block { display: block !important; }
  .md-d-flex { display: flex !important; }
  .md-d-grid { display: grid !important; }
  .md-w-50 { width: 50% !important; }
  .md-w-33 { width: 33.333333% !important; }
  .md-w-25 { width: 25% !important; }
}

@media (min-width: 1024px) {
  .lg-d-none { display: none !important; }
  .lg-d-block { display: block !important; }
  .lg-d-flex { display: flex !important; }
  .lg-d-grid { display: grid !important; }
  .lg-flex-row { flex-direction: row !important; }
}

@media (min-width: 1280px) {
  .xl-d-none { display: none !important; }
  .xl-d-block { display: block !important; }
  .xl-d-flex { display: flex !important; }
}

/* Specific Mobile Hiding Handlers used in pages */
.d-none-mobile { display: block; }
.d-flex-mobile { display: none; }
.d-block-mobile { display: none; }
.d-none-desktop { display: none; }
.d-flex-desktop { display: flex; }

@media (max-width: 768px) {
  .d-none-mobile { display: none !important; }
  .d-flex-mobile { display: flex !important; }
  .d-block-mobile { display: block !important; }
  .d-none-desktop { display: block !important; }
  .d-flex-desktop { display: none !important; }
}

/* Form Custom Controls */
.custom-checkbox {
  appearance: none;
  background-color: var(--bg-surface);
  margin: 0;
  font: inherit;
  color: currentColor;
  width: 1.15em;
  height: 1.15em;
  border: 1px solid var(--border);
  border-radius: 0.15em;
  display: grid;
  place-content: center;
  transition: all var(--transition-fast);
}
.custom-checkbox::before {
  content: "";
  width: 0.65em;
  height: 0.65em;
  transform: scale(0);
  transition: 120ms transform ease-in-out;
  box-shadow: inset 1em 1em var(--gold);
  background-color: CanvasText;
  transform-origin: bottom left;
  clip-path: polygon(14% 44%, 0 65%, 50% 100%, 100% 16%, 80% 0%, 43% 62%);
}
.custom-checkbox:checked {
  border-color: var(--gold);
}
.custom-checkbox:checked::before {
  transform: scale(1);
}

.custom-radio {
  appearance: none;
  background-color: var(--bg-surface);
  margin: 0;
  font: inherit;
  color: currentColor;
  width: 1.15em;
  height: 1.15em;
  border: 1px solid var(--border);
  border-radius: 50%;
  display: grid;
  place-content: center;
  transition: all var(--transition-fast);
}
.custom-radio::before {
  content: "";
  width: 0.65em;
  height: 0.65em;
  border-radius: 50%;
  transform: scale(0);
  transition: 120ms transform ease-in-out;
  box-shadow: inset 1em 1em var(--gold);
  background-color: CanvasText;
}
.custom-radio:checked {
  border-color: var(--gold);
}
.custom-radio:checked::before {
  transform: scale(1);
}