/* ========================================
   ARTÈLYS - World-Class Art E-Commerce Prototype
   Design System & Global Styles
   ======================================== */

/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&family=Inter:wght@300;400;500;600&family=Noto+Serif+SC:wght@300;400;500;600;700&family=Noto+Sans+SC:wght@300;400;500;600&display=swap');

/* ========================================
   CSS Variables - Design Tokens
   ======================================== */
:root {
  /* Color Palette (70-25-5 Rule) */
  --color-gallery-white: #FAFAFA;
  --color-ink-black: #1A1A1A;
  --color-art-gold: #C9A962;
  --color-art-gold-light: #E5D4A1;
  --color-art-gold-dark: #A68B4B;
  
  /* Extended Colors */
  --color-cream: #F5F3EF;
  --color-warm-gray: #8A8680;
  --color-light-gray: #E8E6E3;
  --color-mid-gray: #B5B2AD;
  --color-deep-gray: #4A4845;
  
  /* Functional Colors */
  --color-success: #4A7C59;
  --color-error: #C45C4A;
  --color-warning: #D4A84B;
  
  /* Typography Scale */
  --font-display: 'Cormorant Garamond', 'Noto Serif SC', serif;
  --font-body: 'Inter', 'Noto Sans SC', sans-serif;
  --font-heading: 'Cormorant Garamond', 'Noto Serif SC', serif;
  
  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  --text-hero: clamp(3rem, 8vw, 6rem);
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-section: 8rem;
  
  /* Border Radius */
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(26, 26, 26, 0.05);
  --shadow-md: 0 4px 6px rgba(26, 26, 26, 0.07);
  --shadow-lg: 0 10px 25px rgba(26, 26, 26, 0.1);
  --shadow-xl: 0 20px 40px rgba(26, 26, 26, 0.15);
  --shadow-artwork: 0 25px 50px rgba(26, 26, 26, 0.2);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-smooth: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Z-index Scale */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 300;
  --z-tooltip: 400;
  --z-toast: 500;
  
  /* Layout */
  --container-max: 1400px;
  --container-narrow: 900px;
  --header-height: 80px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-ink-black);
  background-color: var(--color-gallery-white);
  overflow-x: hidden;
}

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

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

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

ul, ol {
  list-style: none;
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 500;
  line-height: 1.2;
  color: var(--color-ink-black);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

.text-display {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.text-caption {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-warm-gray);
}

.text-price {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 500;
  color: var(--color-ink-black);
}

.text-gold {
  color: var(--color-art-gold);
}

/* ========================================
   Layout Components
   ======================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding: var(--space-section) 0;
}

.section--dark {
  background-color: var(--color-ink-black);
  color: var(--color-gallery-white);
}

.section--cream {
  background-color: var(--color-cream);
}

/* ========================================
   Navigation Header
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(250, 250, 250, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: var(--z-sticky);
  border-bottom: 1px solid var(--color-light-gray);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.header--scrolled {
  box-shadow: var(--shadow-md);
}

.header--hidden {
  transform: translateY(-100%);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.logo {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--color-ink-black);
}

.logo span {
  color: var(--color-art-gold);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  position: relative;
  padding: var(--space-sm) 0;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-art-gold);
  transition: width var(--transition-base);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.icon-btn {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  transition: background var(--transition-fast);
  position: relative;
}

.icon-btn:hover {
  background: var(--color-light-gray);
}

.icon-btn svg {
  width: 22px;
  height: 22px;
  stroke: var(--color-ink-black);
}

.icon-btn__badge {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 18px;
  height: 18px;
  background: var(--color-art-gold);
  color: white;
  font-size: 10px;
  font-weight: 600;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--header-height);
}

.hero__background {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.hero__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.7);
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(26, 26, 26, 0.6) 0%,
    rgba(26, 26, 26, 0.3) 50%,
    rgba(26, 26, 26, 0.4) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  color: white;
}

.hero__subtitle {
  font-size: var(--text-sm);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-art-gold-light);
  margin-bottom: var(--space-lg);
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 300;
  line-height: 1.05;
  margin-bottom: var(--space-xl);
  color: white;
}

.hero__title em {
  font-style: italic;
  color: var(--color-art-gold-light);
}

.hero__description {
  font-size: var(--text-lg);
  opacity: 0.9;
  max-width: 500px;
  margin-bottom: var(--space-2xl);
  line-height: 1.7;
}

.hero__cta {
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  cursor: pointer;
}

.btn--primary {
  background: var(--color-art-gold);
  color: white;
  border: 1px solid var(--color-art-gold);
}

.btn--primary:hover {
  background: var(--color-art-gold-dark);
  border-color: var(--color-art-gold-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn--secondary {
  background: transparent;
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.5);
}

.btn--secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: white;
}

.btn--outline {
  background: transparent;
  color: var(--color-ink-black);
  border: 1px solid var(--color-ink-black);
}

.btn--outline:hover {
  background: var(--color-ink-black);
  color: white;
}

.btn--large {
  padding: var(--space-lg) var(--space-2xl);
  font-size: var(--text-base);
}

.btn--icon {
  width: 56px;
  height: 56px;
  padding: 0;
  border-radius: var(--radius-full);
}

/* ========================================
   Cards
   ======================================== */
.card {
  background: white;
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.card__image {
  position: relative;
  aspect-ratio: 4/5;
  overflow: hidden;
}

.card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.card:hover .card__image img {
  transform: scale(1.05);
}

.card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(26, 26, 26, 0.6) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.card:hover .card__overlay {
  opacity: 1;
}

.card__actions {
  position: absolute;
  bottom: var(--space-lg);
  left: var(--space-lg);
  right: var(--space-lg);
  display: flex;
  gap: var(--space-sm);
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--transition-base);
}

.card:hover .card__actions {
  opacity: 1;
  transform: translateY(0);
}

.card__badge {
  position: absolute;
  top: var(--space-md);
  left: var(--space-md);
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-art-gold);
  color: white;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
}

.card__content {
  padding: var(--space-lg);
}

.card__category {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-warm-gray);
  margin-bottom: var(--space-xs);
}

.card__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  margin-bottom: var(--space-sm);
}

.card__artist {
  font-size: var(--text-sm);
  color: var(--color-warm-gray);
  margin-bottom: var(--space-md);
}

.card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ========================================
   Grid Layouts
   ======================================== */
.grid {
  display: grid;
  gap: var(--space-xl);
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1200px) {
  .grid--4 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 900px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
}

/* Masonry Grid */
.grid--masonry {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 10px;
}

.grid--masonry .card {
  grid-row: span 45;
}

@media (max-width: 1200px) {
  .grid--masonry { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .grid--masonry { grid-template-columns: repeat(2, 1fr); }
}

/* ========================================
   Section Headers
   ======================================== */
.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-header__label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-art-gold);
  margin-bottom: var(--space-md);
}

.section-header__title {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 400;
  margin-bottom: var(--space-md);
}

.section-header__description {
  font-size: var(--text-lg);
  color: var(--color-warm-gray);
  max-width: 600px;
  margin: 0 auto;
}

/* ========================================
   Featured Collections
   ======================================== */
.collection-card {
  position: relative;
  aspect-ratio: 3/4;
  overflow: hidden;
  border-radius: var(--radius-md);
}

.collection-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.collection-card:hover .collection-card__image {
  transform: scale(1.08);
}

.collection-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(26, 26, 26, 0.8) 0%,
    rgba(26, 26, 26, 0.2) 50%,
    transparent 100%
  );
}

.collection-card__content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-2xl);
  color: white;
}

.collection-card__count {
  font-size: var(--text-sm);
  opacity: 0.7;
  margin-bottom: var(--space-sm);
}

.collection-card__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 500;
  margin-bottom: var(--space-md);
}

.collection-card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--transition-base);
}

.collection-card:hover .collection-card__link {
  opacity: 1;
  transform: translateY(0);
}

.collection-card__link svg {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-base);
}

.collection-card__link:hover svg {
  transform: translateX(4px);
}

/* ========================================
   Categories Bar
   ======================================== */
.categories-bar {
  display: flex;
  gap: var(--space-md);
  overflow-x: auto;
  padding: var(--space-md) 0;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.categories-bar::-webkit-scrollbar {
  display: none;
}

.category-pill {
  flex-shrink: 0;
  padding: var(--space-sm) var(--space-lg);
  background: white;
  border: 1px solid var(--color-light-gray);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.category-pill:hover,
.category-pill--active {
  background: var(--color-ink-black);
  border-color: var(--color-ink-black);
  color: white;
}

/* ========================================
   Filter Sidebar
   ======================================== */
.filter-sidebar {
  width: 280px;
  padding: var(--space-xl);
  background: white;
  border-right: 1px solid var(--color-light-gray);
  height: calc(100vh - var(--header-height));
  overflow-y: auto;
  position: sticky;
  top: var(--header-height);
}

.filter-group {
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-light-gray);
}

.filter-group:last-child {
  border-bottom: none;
}

.filter-group__title {
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-lg);
}

.filter-options {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.filter-option {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-gallery-white);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-option:hover {
  border-color: var(--color-mid-gray);
}

.filter-option--selected {
  background: var(--color-ink-black);
  color: white;
}

/* Color Swatches */
.color-swatches {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.color-swatch {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.color-swatch:hover {
  transform: scale(1.1);
}

.color-swatch--selected {
  border-color: var(--color-ink-black);
  box-shadow: 0 0 0 2px white, 0 0 0 4px var(--color-ink-black);
}

/* Price Range Slider */
.price-range {
  padding: var(--space-md) 0;
}

.price-range__track {
  height: 4px;
  background: var(--color-light-gray);
  border-radius: var(--radius-full);
  position: relative;
  margin: var(--space-xl) var(--space-sm);
}

.price-range__fill {
  position: absolute;
  height: 100%;
  background: var(--color-art-gold);
  border-radius: var(--radius-full);
  left: 10%;
  right: 30%;
}

.price-range__inputs {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-sm);
  color: var(--color-warm-gray);
}

/* ========================================
   Artwork Detail Page
   ======================================== */
.detail-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  padding: var(--space-4xl) 0;
}

@media (max-width: 1000px) {
  .detail-layout {
    grid-template-columns: 1fr;
  }
}

/* Gallery Viewer */
.gallery-viewer {
  position: sticky;
  top: calc(var(--header-height) + var(--space-xl));
}

.gallery-main {
  position: relative;
  aspect-ratio: 4/5;
  background: var(--color-cream);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-md);
}

.gallery-main__image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  cursor: zoom-in;
  transition: transform var(--transition-base);
}

.gallery-main__image:hover {
  transform: scale(1.02);
}

.gallery-thumbs {
  display: flex;
  gap: var(--space-sm);
}

.gallery-thumb {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 2px solid transparent;
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.gallery-thumb:hover,
.gallery-thumb--active {
  border-color: var(--color-art-gold);
}

.gallery-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Detail Info */
.detail-info {
  padding-top: var(--space-xl);
}

.detail-info__category {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-art-gold);
  margin-bottom: var(--space-sm);
}

.detail-info__title {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 400;
  margin-bottom: var(--space-sm);
}

.detail-info__artist {
  font-size: var(--text-lg);
  color: var(--color-warm-gray);
  margin-bottom: var(--space-xl);
}

.detail-info__price {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 500;
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-light-gray);
}

.detail-info__description {
  font-size: var(--text-lg);
  line-height: 1.8;
  color: var(--color-deep-gray);
  margin-bottom: var(--space-2xl);
}

/* Specs Grid */
.specs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
}

.spec-item {
  padding: var(--space-md);
  background: var(--color-gallery-white);
  border-radius: var(--radius-md);
}

.spec-item__label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-warm-gray);
  margin-bottom: var(--space-xs);
}

.spec-item__value {
  font-weight: 500;
}

/* Frame Customizer */
.frame-customizer {
  background: var(--color-cream);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-2xl);
}

.frame-customizer__title {
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-lg);
}

.frame-options {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.frame-option {
  flex: 1;
  padding: var(--space-md);
  background: white;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.frame-option:hover {
  border-color: var(--color-mid-gray);
}

.frame-option--selected {
  border-color: var(--color-art-gold);
}

.frame-option__preview {
  width: 100%;
  aspect-ratio: 4/3;
  background: var(--color-gallery-white);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  color: var(--color-warm-gray);
}

.frame-option__name {
  font-size: var(--text-sm);
  font-weight: 500;
}

.frame-option__price {
  font-size: var(--text-xs);
  color: var(--color-warm-gray);
}

/* AR Preview Button */
.ar-preview-btn {
  width: 100%;
  padding: var(--space-lg);
  background: linear-gradient(135deg, var(--color-art-gold) 0%, var(--color-art-gold-dark) 100%);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  cursor: pointer;
  transition: all var(--transition-base);
  margin-bottom: var(--space-lg);
}

.ar-preview-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.ar-preview-btn svg {
  width: 24px;
  height: 24px;
}

/* Add to Cart */
.add-to-cart {
  display: flex;
  gap: var(--space-md);
}

.add-to-cart__quantity {
  display: flex;
  align-items: center;
  background: var(--color-gallery-white);
  border: 1px solid var(--color-light-gray);
  border-radius: var(--radius-md);
}

.add-to-cart__qty-btn {
  width: 48px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xl);
  color: var(--color-warm-gray);
  transition: color var(--transition-fast);
}

.add-to-cart__qty-btn:hover {
  color: var(--color-ink-black);
}

.add-to-cart__qty-value {
  width: 48px;
  text-align: center;
  font-weight: 500;
  font-size: var(--text-lg);
}

.add-to-cart__submit {
  flex: 1;
  background: var(--color-ink-black);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all var(--transition-base);
}

.add-to-cart__submit:hover {
  background: var(--color-deep-gray);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Artist Card */
.artist-card {
  display: flex;
  gap: var(--space-xl);
  padding: var(--space-xl);
  background: var(--color-gallery-white);
  border-radius: var(--radius-lg);
  margin-top: var(--space-2xl);
}

.artist-card__avatar {
  width: 100px;
  height: 100px;
  border-radius: var(--radius-full);
  object-fit: cover;
  flex-shrink: 0;
}

.artist-card__info {
  flex: 1;
}

.artist-card__name {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  margin-bottom: var(--space-xs);
}

.artist-card__location {
  font-size: var(--text-sm);
  color: var(--color-warm-gray);
  margin-bottom: var(--space-md);
}

.artist-card__bio {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-deep-gray);
  margin-bottom: var(--space-md);
}

.artist-card__link {
  font-size: var(--text-sm);
  color: var(--color-art-gold);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.artist-card__link:hover {
  text-decoration: underline;
}

/* ========================================
   AR Room Preview Modal
   ======================================== */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(26, 26, 26, 0.9);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.modal--active {
  opacity: 1;
  visibility: visible;
}

.modal__content {
  width: 90%;
  max-width: 1200px;
  height: 80vh;
  background: white;
  border-radius: var(--radius-xl);
  overflow: hidden;
  transform: translateY(20px);
  transition: transform var(--transition-base);
}

.modal--active .modal__content {
  transform: translateY(0);
}

.modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-xl);
  border-bottom: 1px solid var(--color-light-gray);
}

.modal__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
}

.modal__close {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  transition: background var(--transition-fast);
}

.modal__close:hover {
  background: var(--color-light-gray);
}

.modal__body {
  height: calc(100% - 70px);
  display: flex;
}

.ar-room {
  flex: 1;
  position: relative;
  background: linear-gradient(135deg, #E8E4DF 0%, #D4CFC8 100%);
  overflow: hidden;
}

.ar-room__scene {
  width: 100%;
  height: 100%;
  position: relative;
}

.ar-room__artwork {
  position: absolute;
  box-shadow: var(--shadow-artwork);
  transition: all var(--transition-smooth);
  cursor: move;
}

.ar-room__artwork img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ar-room__frame {
  position: absolute;
  inset: -15px;
  border: 8px solid;
  pointer-events: none;
}

.ar-room__controls {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-md);
  background: white;
  padding: var(--space-sm);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
}

.ar-room__control-btn {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  transition: background var(--transition-fast);
}

.ar-room__control-btn:hover {
  background: var(--color-light-gray);
}

.ar-room__control-btn svg {
  width: 24px;
  height: 24px;
}

.ar-sidebar {
  width: 300px;
  background: white;
  padding: var(--space-xl);
  overflow-y: auto;
}

.ar-sidebar__section {
  margin-bottom: var(--space-xl);
}

.ar-sidebar__label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-warm-gray);
  margin-bottom: var(--space-md);
}

.room-presets {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
}

.room-preset {
  aspect-ratio: 4/3;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  position: relative;
  border: 2px solid transparent;
  transition: border-color var(--transition-fast);
}

.room-preset:hover,
.room-preset--active {
  border-color: var(--color-art-gold);
}

.room-preset img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.room-preset__name {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-sm);
  background: linear-gradient(transparent, rgba(0,0,0,0.7));
  color: white;
  font-size: var(--text-xs);
}

.size-presets {
  display: flex;
  gap: var(--space-sm);
}

.size-preset {
  flex: 1;
  padding: var(--space-md);
  background: var(--color-gallery-white);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.size-preset:hover {
  border-color: var(--color-mid-gray);
}

.size-preset--active {
  background: var(--color-ink-black);
  color: white;
}

.size-preset__size {
  font-size: var(--text-lg);
  font-weight: 600;
}

.size-preset__desc {
  font-size: var(--text-xs);
  opacity: 0.7;
}

/* ========================================
   Artists Page
   ======================================== */
.artists-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2xl);
}

@media (max-width: 1000px) {
  .artists-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.artist-card--large {
  text-align: center;
  padding: var(--space-2xl);
  background: white;
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.artist-card--large:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.artist-card--large__avatar {
  width: 150px;
  height: 150px;
  border-radius: var(--radius-full);
  margin: 0 auto var(--space-lg);
  object-fit: cover;
}

.artist-card--large__name {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 500;
  margin-bottom: var(--space-xs);
}

.artist-card--large__style {
  font-size: var(--text-sm);
  color: var(--color-art-gold);
  margin-bottom: var(--space-sm);
}

.artist-card--large__location {
  font-size: var(--text-sm);
  color: var(--color-warm-gray);
  margin-bottom: var(--space-md);
}

.artist-card--large__bio {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-deep-gray);
  margin-bottom: var(--space-lg);
}

.artist-card--large__stats {
  display: flex;
  justify-content: center;
  gap: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-light-gray);
}

.artist-stat__value {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
}

.artist-stat__label {
  font-size: var(--text-xs);
  color: var(--color-warm-gray);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ========================================
   Trust Badges
   ======================================== */
.trust-badges {
  display: flex;
  justify-content: center;
  gap: var(--space-3xl);
  padding: var(--space-2xl);
  background: var(--color-cream);
  flex-wrap: wrap;
}

.trust-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 200px;
}

.trust-badge__icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-md);
  color: var(--color-art-gold);
}

.trust-badge__title {
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.trust-badge__desc {
  font-size: var(--text-xs);
  color: var(--color-warm-gray);
  line-height: 1.5;
}

/* ========================================
   Newsletter Section
   ======================================== */
.newsletter {
  background: var(--color-ink-black);
  color: white;
  text-align: center;
  padding: var(--space-section) 0;
}

.newsletter__title {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 300;
  margin-bottom: var(--space-md);
}

.newsletter__description {
  font-size: var(--text-lg);
  opacity: 0.7;
  margin-bottom: var(--space-2xl);
}

.newsletter__form {
  display: flex;
  max-width: 500px;
  margin: 0 auto;
  gap: var(--space-md);
}

.newsletter__input {
  flex: 1;
  padding: var(--space-md) var(--space-lg);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  color: white;
  font-size: var(--text-base);
  outline: none;
  transition: border-color var(--transition-fast);
}

.newsletter__input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.newsletter__input:focus {
  border-color: var(--color-art-gold);
}

.newsletter__submit {
  padding: var(--space-md) var(--space-2xl);
  background: var(--color-art-gold);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.newsletter__submit:hover {
  background: var(--color-art-gold-dark);
}

/* ========================================
   Footer
   ======================================== */
.footer {
  background: var(--color-gallery-white);
  border-top: 1px solid var(--color-light-gray);
  padding: var(--space-4xl) 0 var(--space-2xl);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

@media (max-width: 900px) {
  .footer__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.footer__brand {
  max-width: 300px;
}

.footer__logo {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-lg);
}

.footer__logo span {
  color: var(--color-art-gold);
}

.footer__desc {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-warm-gray);
  margin-bottom: var(--space-lg);
}

.footer__social {
  display: flex;
  gap: var(--space-md);
}

.footer__social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-light-gray);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.footer__social-link:hover {
  background: var(--color-art-gold);
  color: white;
}

.footer__column__title {
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-lg);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__link {
  font-size: var(--text-sm);
  color: var(--color-warm-gray);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-art-gold);
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--color-light-gray);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer__copyright {
  font-size: var(--text-sm);
  color: var(--color-warm-gray);
}

.footer__payment-methods {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

.footer__payment-icon {
  width: 40px;
  height: 25px;
  background: var(--color-light-gray);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  color: var(--color-warm-gray);
}

/* ========================================
   Utilities
   ======================================== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

.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); }

.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); }

.hidden { display: none !important; }

/* Loading Skeleton */
.skeleton {
  background: linear-gradient(90deg, var(--color-light-gray) 25%, var(--color-gallery-white) 50%, var(--color-light-gray) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  padding: var(--space-lg) var(--space-xl);
  background: var(--color-ink-black);
  color: white;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  z-index: var(--z-toast);
  transform: translateY(100px);
  opacity: 0;
  transition: all var(--transition-base);
}

.toast--active {
  transform: translateY(0);
  opacity: 1;
}

.toast__icon {
  width: 24px;
  height: 24px;
  color: var(--color-success);
}

/* Page Transitions */
.page {
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  :root {
    --header-height: 70px;
    --space-section: 5rem;
  }
  
  .hero__title {
    font-size: clamp(2.5rem, 10vw, 4rem);
  }
  
  .nav {
    display: none;
  }
  
  .section-header__title {
    font-size: var(--text-3xl);
  }
  
  .footer__grid {
    grid-template-columns: 1fr;
  }
  
  .newsletter__form {
    flex-direction: column;
  }
}