/**
 * AURUM - Premium Timepieces
 * Mobile-first, accessible, dark-mode ready CSS
 * NO external dependencies - custom design system
 */

/* ==========================================================================
   CSS Custom Properties (Design Tokens)
   ========================================================================== */
:root {
  /* Colors - Light Mode */
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f8f8f8;
  --color-bg-tertiary: #f0f0f0;
  --color-text-primary: #0a0a0a;
  --color-text-secondary: #4a4a4a;
  --color-text-tertiary: #6a6a6a;
  --color-text-muted: #8a8a8a;
  --color-border: #e5e5e5;
  --color-border-strong: #cccccc;
  --color-accent: #c9a962;
  --color-accent-dark: #b8994d;
  --color-accent-light: #d4b978;
  --color-success: #22c55e;
  --color-error: #ef4444;
  --color-warning: #f59e0b;
  --color-info: #3b82f6;
  
  /* Typography */
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-display: 'Georgia', 'Times New Roman', serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', monospace;
  
  --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: 2rem;
  --text-4xl: 2.5rem;
  --text-5xl: 3.5rem;
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  
  /* Layout */
  --container-max: 1400px;
  --container-narrow: 900px;
  --header-height: 64px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-spring: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 20px rgba(201, 169, 98, 0.3);
  
  /* Radii */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg-primary: #0a0a0a;
    --color-bg-secondary: #141414;
    --color-bg-tertiary: #1a1a1a;
    --color-text-primary: #ffffff;
    --color-text-secondary: #b0b0b0;
    --color-text-tertiary: #808080;
    --color-text-muted: #505050;
    --color-border: #2a2a2a;
    --color-border-strong: #3a3a3a;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.6);
  }
}

/* Manual Dark Mode Class */
[data-theme="dark"] {
  --color-bg-primary: #0a0a0a;
  --color-bg-secondary: #141414;
  --color-bg-tertiary: #1a1a1a;
  --color-text-primary: #ffffff;
  --color-text-secondary: #b0b0b0;
  --color-text-tertiary: #808080;
  --color-text-muted: #505050;
  --color-border: #2a2a2a;
  --color-border-strong: #3a3a3a;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.6);
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  min-height: 100vh;
}

/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-3) var(--space-6);
  background: var(--color-accent);
  color: var(--color-bg-primary);
  text-decoration: none;
  font-weight: 600;
  border-radius: var(--radius-md);
  z-index: 10000;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* Focus Styles */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Visually Hidden (Screen Reader Only) */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ==========================================================================
   Typography
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-text-primary);
}

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

p {
  margin-bottom: var(--space-4);
}

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

a:hover {
  color: var(--color-accent-dark);
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: 500;
  line-height: 1.5;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  touch-action: manipulation;
  min-height: 44px;
  min-width: 44px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-bg-primary);
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-accent-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-bg-secondary);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  padding: var(--space-2) var(--space-3);
}

.btn-ghost:hover:not(:disabled) {
  color: var(--color-text-primary);
  background: var(--color-bg-tertiary);
}

.btn-large {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
  min-height: 56px;
}

.btn-small {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  min-height: 36px;
}

.btn-full {
  width: 100%;
}

.btn-link {
  display: inline;
  padding: 0;
  background: none;
  border: none;
  color: var(--color-accent);
  text-decoration: underline;
  font-size: inherit;
  cursor: pointer;
  min-height: auto;
  min-width: auto;
}

.btn-link:hover {
  color: var(--color-accent-dark);
}

/* ==========================================================================
   Forms
   ========================================================================== */
input,
select,
textarea {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  padding: var(--space-3) var(--space-4);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  width: 100%;
  min-height: 44px;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(201, 169, 98, 0.2);
}

input:invalid:not(:placeholder-shown),
select:invalid:not(:placeholder-shown) {
  border-color: var(--color-error);
}

label {
  display: block;
  margin-bottom: var(--space-2);
  font-weight: 500;
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

.field-error {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-error);
}

.input-help {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Checkbox & Radio */
input[type="checkbox"],
input[type="radio"] {
  width: auto;
  min-height: auto;
  margin-right: var(--space-2);
}

.checkbox-field {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
}

.checkbox-field input {
  margin-top: 3px;
}

.checkbox-field span {
  flex: 1;
}

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(10px);
  background-color: rgba(255, 255, 255, 0.9);
}

[data-theme="dark"] .site-header,
@media (prefers-color-scheme: dark) {
  .site-header {
    background-color: rgba(10, 10, 10, 0.9);
  }
}

.header-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text-primary);
}

.logo-mark {
  font-size: var(--text-2xl);
  color: var(--color-accent);
}

.logo-text {
  font-size: var(--text-xl);
  font-weight: 600;
  letter-spacing: 0.05em;
}

/* Navigation */
.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.hamburger {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  position: relative;
  transition: background var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-text-primary);
  transition: transform var(--transition-fast);
}

.hamburger::before {
  top: -7px;
}

.hamburger::after {
  bottom: -7px;
}

.nav-toggle[aria-expanded="true"] .hamburger {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .hamburger::before {
  transform: rotate(45deg);
  top: 0;
}

.nav-toggle[aria-expanded="true"] .hamburger::after {
  transform: rotate(-45deg);
  bottom: 0;
}

.nav-list {
  display: none;
  list-style: none;
  gap: var(--space-6);
}

.nav-link {
  color: var(--color-text-secondary);
  font-weight: 500;
  padding: var(--space-2) 0;
  position: relative;
}

.nav-link:hover {
  color: var(--color-text-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-fast);
}

.nav-link:hover::after {
  width: 100%;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.search-toggle,
.locale-toggle,
.cart-toggle,
.rewards-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-primary);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.search-toggle:hover,
.locale-toggle:hover,
.cart-toggle:hover,
.rewards-toggle:hover {
  background: var(--color-bg-tertiary);
}

.cart-count {
  position: absolute;
  top: 4px;
  right: 4px;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  background: var(--color-accent);
  color: var(--color-bg-primary);
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

.cart-toggle {
  position: relative;
}

/* Panels */
.search-panel,
.locale-panel,
.rewards-panel {
  position: absolute;
  top: calc(100% + var(--space-2));
  right: 0;
  width: 320px;
  max-width: calc(100vw - var(--space-8));
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--space-4);
  z-index: 1001;
}

.search-panel {
  left: 0;
  right: auto;
  width: 100%;
  max-width: 400px;
}

/* Search Results */
.search-results {
  max-height: 300px;
  overflow-y: auto;
  margin-top: var(--space-3);
}

.search-result-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.search-result-item:hover,
.search-result-item[aria-selected="true"] {
  background: var(--color-bg-secondary);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-8) var(--space-4);
  background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
}

.hero-subtitle {
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.hero-title {
  font-size: var(--text-5xl);
  font-family: var(--font-display);
  margin-bottom: var(--space-4);
  line-height: 1.1;
}

.hero-description {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

/* Trust Signals */
.trust-signals {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

/* Hero Watch Animation */
.hero-visual {
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  width: 400px;
  height: 400px;
  opacity: 0.3;
}

.watch-face {
  width: 100%;
  height: 100%;
  position: relative;
  animation: slowRotate 60s linear infinite;
}

.watch-bezel {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 8px solid var(--color-accent);
  box-shadow: inset 0 0 40px rgba(0,0,0,0.3);
}

.watch-dial {
  position: absolute;
  inset: 20px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #2a2a2a, #0a0a0a);
}

.watch-hand {
  position: absolute;
  bottom: 50%;
  left: 50%;
  transform-origin: bottom center;
  background: var(--color-accent);
  border-radius: 2px;
}

.watch-hand.hour {
  width: 6px;
  height: 80px;
  margin-left: -3px;
  animation: rotateHour 43200s linear infinite;
}

.watch-hand.minute {
  width: 4px;
  height: 120px;
  margin-left: -2px;
  animation: rotateMinute 3600s linear infinite;
}

.watch-hand.second {
  width: 2px;
  height: 140px;
  margin-left: -1px;
  background: #ff4444;
  animation: rotateSecond 60s linear infinite;
}

.watch-center {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 16px;
  margin: -8px 0 0 -8px;
  background: var(--color-accent);
  border-radius: 50%;
}

@keyframes slowRotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes rotateHour {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes rotateMinute {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes rotateSecond {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ==========================================================================
   Configurator Section
   ========================================================================== */
.configurator-section {
  padding: var(--space-16) var(--space-4);
  background: var(--color-bg-secondary);
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--space-12);
}

.section-title {
  font-size: var(--text-4xl);
  font-family: var(--font-display);
  margin-bottom: var(--space-3);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
}

.product-rating {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

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

.rating-text {
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
}

.product-badges {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.badge {
  padding: var(--space-1) var(--space-3);
  background: var(--color-accent);
  color: var(--color-bg-primary);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-sm);
}

/* Configurator Layout */
.configurator-layout {
  max-width: var(--container-max);
  margin: 0 auto;
  display: grid;
  gap: var(--space-8);
}

/* Viewer Container */
.viewer-container {
  background: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.viewer-header {
  padding: var(--space-4);
  background: var(--color-bg-tertiary);
  border-bottom: 1px solid var(--color-border);
}

.viewer-hint {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-align: center;
}

.viewer-hint .hint-mobile {
  display: block;
}

.viewer-hint .hint-desktop {
  display: none;
}

.product-canvas {
  width: 100%;
  height: 300px;
  display: block;
  cursor: grab;
  touch-action: none;
}

.product-canvas:active {
  cursor: grabbing;
}

.canvas-fallback {
  text-align: center;
  padding: var(--space-8);
}

.canvas-fallback img {
  max-width: 100%;
  height: auto;
  margin-bottom: var(--space-4);
}

/* Gallery Thumbnails */
.gallery-thumbs {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--color-bg-tertiary);
  justify-content: center;
}

.gallery-thumb {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-primary);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.gallery-thumb:hover {
  border-color: var(--color-border);
}

.gallery-thumb.active {
  border-color: var(--color-accent);
}

/* Config Panel */
.config-panel {
  background: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-lg);
}

.config-price {
  text-align: center;
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-6);
}

.price-current {
  display: block;
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--color-text-primary);
}

.price-original {
  display: block;
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  text-decoration: line-through;
  margin-top: var(--space-1);
}

.price-note {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
  margin-bottom: 0;
}

/* Stock Status */
.stock-status {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.stock-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.stock-indicator.in-stock {
  background: var(--color-success);
}

.stock-indicator.low {
  background: var(--color-warning);
}

.stock-indicator.out {
  background: var(--color-error);
}

.stock-text {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* Config Options */
.config-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.config-group {
  border: none;
  padding: 0;
}

.config-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
}

.info-toggle {
  width: 20px;
  height: 20px;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.info-toggle:hover {
  color: var(--color-accent);
}

.info-panel {
  background: var(--color-bg-tertiary);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.info-panel p {
  margin-bottom: var(--space-2);
}

.info-panel p:last-child {
  margin-bottom: 0;
}

/* Option Cards */
.option-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

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

.option-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3);
  background: var(--color-bg-secondary);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.option-card:hover {
  border-color: var(--color-border);
}

.option-card input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.option-card:has(input:checked) {
  border-color: var(--color-accent);
  background: var(--color-bg-primary);
}

.option-card:has(input:focus) {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.option-card.compact {
  padding: var(--space-2);
}

.option-swatch {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--swatch-color, #ccc);
  border: 2px solid var(--color-border);
  box-shadow: inset 0 0 4px rgba(0,0,0,0.1);
}

.option-swatch.gradient-blue {
  background: linear-gradient(135deg, #1a365d 0%, #2b6cb0 50%, #63b3ed 100%);
}

.option-swatch.meteorite-pattern {
  background: linear-gradient(45deg, #3a3a3a 0%, #4a4a4a 25%, #5a5a5a 50%, #4a4a4a 75%, #3a3a3a 100%);
}

.option-swatch.pearlescent {
  background: linear-gradient(135deg, #f0f0f0 0%, #e8d5d5 50%, #f5f5f5 100%);
}

.option-name {
  font-size: var(--text-sm);
  font-weight: 500;
  text-align: center;
}

.option-price {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.stock-badge {
  position: absolute;
  top: -6px;
  right: -6px;
  padding: var(--space-1) var(--space-2);
  background: var(--color-error);
  color: white;
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.stock-badge.low {
  background: var(--color-warning);
  color: var(--color-text-primary);
}

.stock-badge.limited {
  background: var(--color-accent);
}

/* Option List (for straps) */
.option-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.option-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--color-bg-secondary);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.option-row:hover {
  border-color: var(--color-border);
}

.option-row input {
  width: auto;
  min-height: auto;
}

.option-row:has(input:checked) {
  border-color: var(--color-accent);
  background: var(--color-bg-primary);
}

.option-text {
  flex: 1;
}

.option-title {
  display: block;
  font-weight: 500;
}

.option-desc {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

/* Engraving Input */
.engraving-input {
  margin-top: var(--space-4);
  padding: var(--space-4);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
}

.engraving-input label {
  font-size: var(--text-sm);
  font-weight: 500;
}

.char-count {
  display: block;
  text-align: right;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* Incompatibility Warning */
.incompatibility-warning {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  background: #fef3c7;
  border: 1px solid #f59e0b;
  border-radius: var(--radius-md);
  color: #92400e;
}

.incompatibility-warning svg {
  flex-shrink: 0;
  color: #f59e0b;
}

.incompatibility-warning p {
  margin: 0;
  font-size: var(--text-sm);
}

[data-theme="dark"] .incompatibility-warning {
  background: #451a03;
  border-color: #f59e0b;
  color: #fcd34d;
}

/* Config Actions */
.config-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.quantity-selector {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

.qty-btn {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-tertiary);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-xl);
  font-weight: 300;
  cursor: pointer;
  color: var(--color-text-primary);
  transition: background var(--transition-fast);
}

.qty-btn:hover {
  background: var(--color-border);
}

.quantity-selector input {
  width: 60px;
  text-align: center;
  padding: var(--space-2);
}

.btn-price {
  margin-left: auto;
  padding-left: var(--space-4);
  border-left: 1px solid rgba(255,255,255,0.3);
}

/* Size Helper */
.size-helper {
  margin-top: var(--space-6);
  padding: var(--space-4);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
}

.helper-title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.size-inputs {
  display: flex;
  gap: var(--space-3);
  align-items: flex-end;
}

.size-field {
  flex: 1;
}

.size-field span {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.size-result {
  margin-top: var(--space-3);
  font-weight: 500;
  color: var(--color-accent);
}

/* Frequently Bought Together */
.frequently-bought {
  margin-top: var(--space-6);
  padding: var(--space-4);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
}

.frequently-bought h3 {
  font-size: var(--text-base);
  margin-bottom: var(--space-3);
}

.fbt-items {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.fbt-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
}

.fbt-item input {
  width: auto;
}

.fbt-info {
  flex: 1;
}

.fbt-name {
  display: block;
  font-weight: 500;
}

.fbt-price {
  font-size: var(--text-sm);
  color: var(--color-success);
}

.fbt-original {
  text-decoration: line-through;
  color: var(--color-text-muted);
  margin-left: var(--space-1);
}

.fbt-savings {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-success);
  font-weight: 500;
}

/* Product Specs */
.product-specs {
  margin-top: var(--space-6);
}

.specs-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-3) 0;
  background: none;
  border: none;
  font-size: var(--text-base);
  font-weight: 600;
  cursor: pointer;
  color: var(--color-text-primary);
}

.specs-toggle svg {
  transition: transform var(--transition-fast);
}

.specs-toggle[aria-expanded="true"] svg {
  transform: rotate(180deg);
}

.specs-list {
  display: grid;
  gap: var(--space-2);
}

.spec-row {
  display: flex;
  justify-content: space-between;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border);
}

.spec-row dt {
  color: var(--color-text-secondary);
}

.spec-row dd {
  font-weight: 500;
  color: var(--color-text-primary);
}

/* ==========================================================================
   AI Assistant Section
   ========================================================================== */
.ai-assistant-section {
  padding: var(--space-16) var(--space-4);
  background: var(--color-bg-primary);
}

.section-container {
  max-width: var(--container-narrow);
  margin: 0 auto;
}

.ai-interface {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-lg);
}

.ai-display {
  background: var(--color-bg-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin-bottom: var(--space-4);
  min-height: 120px;
}

.ai-status {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.ai-avatar {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  color: var(--color-bg-primary);
  border-radius: 50%;
  font-weight: 700;
}

.ai-state {
  color: var(--color-text-secondary);
  font-style: italic;
}

.ai-actions {
  margin-top: var(--space-3);
}

.ai-action-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  font-size: var(--text-sm);
  animation: fadeSlideIn 0.3s ease;
}

.ai-action-item svg {
  color: var(--color-accent);
}

.ai-action-item.completed {
  opacity: 0.6;
}

.ai-action-item.error {
  color: var(--color-error);
}

@keyframes fadeSlideIn {
  from {
    opacity: 0;
    transform: translateX(-10px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* AI Controls */
.ai-controls {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.ai-presets {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.ai-preset {
  padding: var(--space-2) var(--space-4);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.ai-preset:hover {
  border-color: var(--color-accent);
  background: var(--color-bg-primary);
}

.ai-input-group {
  display: flex;
  gap: var(--space-2);
}

.ai-input {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
}

.ai-input:focus {
  border-color: var(--color-accent);
  outline: none;
}

/* AI Undo */
.ai-undo {
  margin-top: var(--space-3);
  text-align: center;
}

/* ==========================================================================
   Collection Section
   ========================================================================== */
.collection-section {
  padding: var(--space-16) var(--space-4);
  background: var(--color-bg-secondary);
}

.product-grid {
  max-width: var(--container-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.product-card {
  background: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.product-image {
  aspect-ratio: 4/3;
  background: var(--color-bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.product-placeholder {
  font-size: 4rem;
  opacity: 0.3;
}

.product-info {
  padding: var(--space-5);
}

.product-name {
  font-size: var(--text-xl);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.product-tagline {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-2);
}

.product-price {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-accent);
}

/* ==========================================================================
   Story Section
   ========================================================================== */
.story-section {
  padding: var(--space-20) var(--space-4);
  background: var(--color-bg-primary);
}

.story-content {
  max-width: var(--container-narrow);
  margin: 0 auto;
  text-align: center;
}

.story-lead {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

.story-values {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-12);
}

.value-card {
  padding: var(--space-6);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-xl);
  transition: transform var(--transition-base);
}

.value-card:hover {
  transform: translateY(-4px);
}

.value-icon {
  display: block;
  font-size: var(--text-3xl);
  margin-bottom: var(--space-3);
  color: var(--color-accent);
}

.value-card h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-2);
}

.value-card p {
  color: var(--color-text-tertiary);
  margin-bottom: 0;
}

/* ==========================================================================
   Rewards Section
   ========================================================================== */
.rewards-section {
  padding: var(--space-16) var(--space-4);
  background: var(--color-bg-secondary);
}

.rewards-tiers {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.tier-card {
  background: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  box-shadow: var(--shadow-md);
  border: 2px solid transparent;
  transition: all var(--transition-base);
}

.tier-card[data-tier="gold"] {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-glow);
}

.tier-card[data-tier="platinum"] {
  position: relative;
  overflow: hidden;
}

.tier-card[data-tier="platinum"]::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #e5e4e2, #ffffff, #e5e4e2);
}

.tier-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-4);
}

.tier-badge {
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: var(--space-1) var(--space-3);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-sm);
}

.tier-card[data-tier="silver"] .tier-badge {
  color: #a0a0a0;
}

.tier-card[data-tier="gold"] .tier-badge {
  background: var(--color-accent);
  color: var(--color-bg-primary);
}

.tier-card[data-tier="platinum"] .tier-badge {
  background: linear-gradient(135deg, #e5e4e2, #c0c0c0);
  color: var(--color-bg-primary);
}

.tier-range {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.tier-benefits {
  list-style: none;
}

.tier-benefits li {
  padding: var(--space-2) 0;
  padding-left: var(--space-5);
  position: relative;
  font-size: var(--text-sm);
}

.tier-benefits li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: 700;
}

.tier-status {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.tier-status.current {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-accent);
  font-weight: 600;
}

.status-indicator {
  width: 8px;
  height: 8px;
  background: var(--color-success);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.tier-locked {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* Progress Bar */
.progress-bar {
  height: 6px;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: var(--space-2);
}

.progress-fill {
  height: 100%;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

.progress-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Gamification Panel */
.gamification-panel {
  margin-top: var(--space-8);
  padding: var(--space-6);
  background: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
}

.gamification-title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-4);
}

/* Streak Tracker */
.streak-tracker {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
}

.streak-display {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.streak-icon {
  font-size: var(--text-2xl);
}

.streak-count {
  display: block;
  font-weight: 600;
}

.streak-label {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Achievements */
.achievements {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.achievement {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-4);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  opacity: 0.6;
}

.achievement:has(.unlocked) {
  opacity: 1;
  background: var(--color-bg-primary);
  border: 1px solid var(--color-accent);
}

.achievement-icon {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-2);
}

.achievement-icon.locked {
  filter: grayscale(1);
  opacity: 0.5;
}

.achievement-name {
  font-size: var(--text-sm);
  font-weight: 500;
  margin-bottom: var(--space-1);
}

.achievement-status {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.achievement-status.unlocked {
  color: var(--color-success);
}

/* Referral Section */
.referral-section {
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.referral-section h4 {
  margin-bottom: var(--space-2);
}

.referral-section p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
}

.referral-code {
  display: flex;
  gap: var(--space-2);
}

.referral-code input {
  flex: 1;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

/* ==========================================================================
   Cart Drawer
   ========================================================================== */
.cart-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.cart-overlay[aria-hidden="false"] {
  opacity: 1;
  visibility: visible;
}

.cart-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  max-width: 420px;
  background: var(--color-bg-primary);
  z-index: 2001;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  box-shadow: var(--shadow-xl);
}

.cart-drawer:not([hidden]) {
  transform: translateX(0);
}

.cart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.cart-title {
  font-size: var(--text-xl);
  font-weight: 600;
}

.cart-close {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-primary);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

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

.cart-content {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
}

/* Cart Items */
.cart-items {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.cart-item {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
}

.cart-item-image {
  width: 80px;
  height: 80px;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
  flex-shrink: 0;
}

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

.cart-item-name {
  font-weight: 600;
  margin-bottom: var(--space-1);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cart-item-variants {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-2);
}

.cart-item-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cart-item-qty {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.cart-item-qty button {
  width: 28px;
  height: 28px;
  padding: 0;
  background: var(--color-bg-tertiary);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: var(--text-lg);
  line-height: 1;
}

.cart-item-qty span {
  min-width: 24px;
  text-align: center;
  font-weight: 500;
}

.cart-item-price {
  font-weight: 600;
  color: var(--color-accent);
}

.cart-item-remove {
  padding: var(--space-1) var(--space-2);
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  cursor: pointer;
  text-decoration: underline;
}

/* Empty Cart */
.cart-empty {
  text-align: center;
  padding: var(--space-8) var(--space-4);
  color: var(--color-text-muted);
}

.cart-empty svg {
  margin-bottom: var(--space-4);
}

.cart-empty p {
  margin-bottom: var(--space-4);
}

/* Cart Coupon */
.cart-coupon {
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-4);
}

.coupon-input-group {
  display: flex;
  gap: var(--space-2);
}

.coupon-input-group input {
  flex: 1;
  text-transform: uppercase;
}

.coupon-message {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
}

.coupon-message.success {
  color: var(--color-success);
}

.coupon-message.error {
  color: var(--color-error);
}

/* Cart Summary */
.cart-summary {
  margin-top: auto;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  padding: var(--space-2) 0;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.summary-row span:first-child {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.summary-total {
  display: flex;
  justify-content: space-between;
  padding: var(--space-3) 0;
  margin-top: var(--space-2);
  border-top: 2px solid var(--color-border);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text-primary);
}

.summary-total span:last-child {
  color: var(--color-accent);
}

/* Free Shipping Progress */
.free-shipping-progress {
  margin: var(--space-4) 0;
  padding: var(--space-3);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-md);
}

.free-shipping-progress .progress-bar {
  margin-bottom: var(--space-2);
}

.free-shipping-progress p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: 0;
  text-align: center;
}

.cart-security {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ==========================================================================
   Checkout Modal
   ========================================================================== */
.modal {
  position: fixed;
  inset: 0;
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  width: 100%;
  max-width: 640px;
  max-height: 90vh;
  background: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  z-index: 1;
  display: flex;
  flex-direction: column;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.modal-title {
  font-size: var(--text-xl);
  font-weight: 600;
}

.modal-close {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  font-size: var(--text-2xl);
  cursor: pointer;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
}

/* Checkout Progress */
.checkout-progress {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-6);
  background: var(--color-bg-secondary);
}

.progress-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  opacity: 0.5;
}

.progress-step.active {
  opacity: 1;
}

.progress-step.completed .step-number {
  background: var(--color-success);
}

.step-number {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-tertiary);
  border-radius: 50%;
  font-size: var(--text-sm);
  font-weight: 600;
}

.progress-step.active .step-number {
  background: var(--color-accent);
  color: var(--color-bg-primary);
}

.step-label {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
}

/* Checkout Steps */
.checkout-step {
  padding: var(--space-6);
  overflow-y: auto;
  flex: 1;
}

.checkout-step h3 {
  margin-bottom: var(--space-4);
}

.checkout-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.form-field {
  display: block;
}

.field-label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
}

.required {
  color: var(--color-error);
}

/* Shipping Options */
.shipping-options {
  border: none;
  margin-top: var(--space-6);
}

.shipping-options legend {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.shipping-option {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-bg-secondary);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-2);
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.shipping-option:has(input:checked) {
  border-color: var(--color-accent);
}

.shipping-option input {
  width: auto;
  min-height: auto;
}

.shipping-info {
  flex: 1;
}

.shipping-name {
  display: block;
  font-weight: 500;
}

.shipping-time {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

.shipping-price {
  font-weight: 600;
}

/* Payment Options */
.payment-options {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.payment-option {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--color-bg-secondary);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.payment-option:has(input:checked) {
  border-color: var(--color-accent);
}

.payment-option input {
  position: absolute;
  opacity: 0;
}

.payment-icon {
  font-size: var(--text-2xl);
}

.payment-name {
  font-size: var(--text-sm);
  font-weight: 500;
}

/* Card Form */
.card-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-md);
}

/* Review Section */
.review-section {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
}

.review-section h4 {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

.review-section address,
.review-section p {
  font-style: normal;
  font-weight: 500;
  margin: 0;
}

#review-items {
  margin-top: var(--space-3);
}

.review-item {
  display: flex;
  justify-content: space-between;
  padding: var(--space-2) 0;
  font-size: var(--text-sm);
}

/* Checkout Terms */
.checkout-terms {
  margin-top: var(--space-4);
  padding: var(--space-4);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-md);
}

.checkout-terms a {
  text-decoration: underline;
}

/* Checkout Actions */
.checkout-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
  margin-top: var(--space-6);
}

/* Confirmation */
.checkout-step.confirmation {
  text-align: center;
}

.confirmation-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-success);
  color: white;
  font-size: var(--text-3xl);
  border-radius: 50%;
  animation: scaleIn var(--transition-spring);
}

@keyframes scaleIn {
  from {
    transform: scale(0);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.confirmation-message {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}

.order-details {
  background: var(--color-bg-secondary);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-6);
}

.order-details p {
  margin-bottom: var(--space-2);
}

.order-details p:last-child {
  margin-bottom: 0;
}

.confirmation-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  margin-bottom: var(--space-6);
}

.post-purchase {
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.share-buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  margin-top: var(--space-3);
}

.btn-share {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-tertiary);
  border: none;
  border-radius: var(--radius-full);
  font-size: var(--text-lg);
  cursor: pointer;
  transition: transform var(--transition-fast), background var(--transition-fast);
}

.btn-share:hover {
  transform: scale(1.1);
  background: var(--color-accent);
}

/* ==========================================================================
   Toast Notifications
   ========================================================================== */
.toast-container {
  position: fixed;
  bottom: var(--space-4);
  left: 50%;
  transform: translateX(-50%);
  z-index: 5000;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
}

.toast {
  padding: var(--space-3) var(--space-5);
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  animation: toastSlideUp 0.3s ease;
  pointer-events: auto;
}

.toast.success {
  border-left: 4px solid var(--color-success);
}

.toast.error {
  border-left: 4px solid var(--color-error);
}

.toast.info {
  border-left: 4px solid var(--color-info);
}

@keyframes toastSlideUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--color-bg-secondary);
  padding: var(--space-12) var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border);
}

.footer-container {
  max-width: var(--container-max);
  margin: 0 auto;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: var(--space-8);
}

.footer-brand .logo-mark {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-2);
}

.footer-brand .logo-text {
  font-size: var(--text-2xl);
}

.footer-brand p {
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.footer-column h3 {
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
  color: var(--color-text-secondary);
}

.footer-column ul {
  list-style: none;
}

.footer-column li {
  margin-bottom: var(--space-2);
}

.footer-column a {
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
}

.footer-column a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer-bottom p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.footer-legal {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
}

.footer-legal a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ==========================================================================
   Responsive - Tablet & Desktop
   ========================================================================== */
@media (min-width: 768px) {
  /* Typography Scale */
  :root {
    --text-5xl: 5rem;
    --text-4xl: 3.5rem;
    --text-3xl: 2.5rem;
  }
  
  /* Navigation */
  .nav-toggle {
    display: none;
  }
  
  .nav-list {
    display: flex;
  }
  
  /* Hero */
  .hero {
    flex-direction: row;
    align-items: center;
    padding: var(--space-12);
  }
  
  .hero-visual {
    position: relative;
    right: auto;
    top: auto;
    transform: none;
    opacity: 1;
    width: 500px;
    height: 500px;
  }
  
  .viewer-hint .hint-mobile {
    display: none;
  }
  
  .viewer-hint .hint-desktop {
    display: block;
  }
  
  .product-canvas {
    height: 500px;
  }
  
  /* Configurator */
  .configurator-layout {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
  
  .option-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .option-grid.small {
    grid-template-columns: repeat(4, 1fr);
  }
  
  /* Checkout */
  .form-row {
    grid-template-columns: 1fr 1fr;
  }
  
  /* Story */
  .story-values {
    grid-template-columns: repeat(4, 1fr);
  }
  
  /* Rewards */
  .rewards-tiers {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .achievements {
    grid-template-columns: repeat(4, 1fr);
  }
  
  /* Footer */
  .footer-nav {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .footer-brand {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
  
  .footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .footer-bottom p {
    margin-bottom: 0;
  }
}

@media (min-width: 1024px) {
  .header-container {
    padding: 0 var(--space-8);
  }
  
  .hero {
    padding: var(--space-16) var(--space-12);
  }
  
  .configurator-section,
  .ai-assistant-section,
  .collection-section,
  .rewards-section {
    padding: var(--space-20) var(--space-8);
  }
  
  .hero-visual {
    width: 600px;
    height: 600px;
  }
  
  .product-canvas {
    height: 600px;
  }
  
  /* Product Grid */
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1280px) {
  .product-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ==========================================================================
   High Contrast Mode Support
   ========================================================================== */
@media (prefers-contrast: high) {
  :root {
    --color-border: #000000;
    --color-text-primary: #000000;
    --color-text-secondary: #000000;
  }
  
  .btn-primary {
    border: 2px solid #000000;
  }
  
  .option-card:has(input:checked),
  .option-row:has(input:checked),
  .shipping-option:has(input:checked),
  .payment-option:has(input:checked) {
    outline: 2px solid #000000;
  }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */
@media print {
  .site-header,
  .cart-toggle,
  .cart-drawer,
  .modal,
  .ai-assistant-section,
  .rewards-section,
  .nav-toggle,
  .search-toggle,
  .locale-toggle,
  .btn {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .configurator-section {
    page-break-inside: avoid;
  }
}