/* ============================================
   Sy Tools - Professional Knife Sharpener Store
   Main Stylesheet
   ============================================ */

/* CSS Custom Properties */
:root {
  /* Colors */
  --color-primary: #d4782f;
  --color-primary-hover: #b86526;
  --color-primary-light: #fdf0e5;
  --color-secondary: #1a1a1a;
  --color-dark: #0d0d0d;
  --color-darker: #050505;
  --color-light: #f8f8f8;
  --color-white: #ffffff;
  --color-gray-50: #fafafa;
  --color-gray-100: #f5f5f5;
  --color-gray-200: #e5e5e5;
  --color-gray-300: #d4d4d4;
  --color-gray-400: #a3a3a3;
  --color-gray-500: #737373;
  --color-gray-600: #525252;
  --color-gray-700: #404040;
  --color-gray-800: #262626;
  --color-gray-900: #171717;
  
  /* Semantic */
  --color-success: #16a34a;
  --color-warning: #f59e0b;
  --color-error: #dc2626;
  --color-info: #2563eb;
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;
  
  /* Layout */
  --max-width: 1280px;
  --header-height: 72px;
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --border-radius-xl: 16px;
  
  /* 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);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-gray-800);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul, ol {
  list-style: none;
}

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* ============================================
   Header & Navigation
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-gray-200);
  z-index: 1000;
  transition: box-shadow var(--transition-base);
}

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

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-dark);
  letter-spacing: -0.5px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.2rem;
}

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

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-gray-600);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* Language Switcher */
.lang-switcher {
  position: relative;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 6px 12px;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--border-radius);
  font-size: 0.85rem;
  color: var(--color-gray-600);
  transition: all var(--transition-fast);
}

.lang-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.lang-btn .arrow {
  font-size: 0.6rem;
  transition: transform var(--transition-fast);
}

.lang-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 4px;
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  max-height: 320px;
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
  z-index: 100;
}

.lang-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-option {
  display: block;
  width: 100%;
  padding: 8px 16px;
  text-align: left;
  font-size: 0.85rem;
  color: var(--color-gray-700);
  transition: background var(--transition-fast);
}

.lang-option:hover {
  background: var(--color-gray-50);
}

.lang-option.active {
  color: var(--color-primary);
  font-weight: 600;
  background: var(--color-primary-light);
}

/* Cart Button */
.cart-btn {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius);
  transition: background var(--transition-fast);
  font-size: 1.2rem;
}

.cart-btn:hover {
  background: var(--color-gray-100);
}

.cart-count {
  position: absolute;
  top: 2px;
  right: 2px;
  min-width: 18px;
  height: 18px;
  background: var(--color-primary);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
}

/* Mobile Menu */
.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-white);
  z-index: 999;
  padding: var(--spacing-xl);
  flex-direction: column;
  gap: var(--spacing-md);
  overflow-y: auto;
}

.mobile-nav.open {
  display: flex;
}

.mobile-nav a {
  font-size: 1.1rem;
  font-weight: 500;
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-gray-100);
  color: var(--color-gray-700);
}

/* ============================================
   Page Container
   ============================================ */
.page {
  display: none;
  min-height: calc(100vh - var(--header-height));
  padding-top: var(--header-height);
}

.page.active {
  display: block;
}

/* ============================================
   Hero Section (Home)
   ============================================ */
.hero {
  position: relative;
  background: linear-gradient(135deg, var(--color-dark) 0%, #1a1a2e 50%, #16213e 100%);
  color: var(--color-white);
  padding: var(--spacing-4xl) var(--spacing-xl);
  overflow: hidden;
  min-height: 600px;
  display: flex;
  align-items: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(212,120,47,0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: var(--spacing-lg);
  letter-spacing: -1px;
}

.hero-content h1 span {
  color: var(--color-primary);
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--color-gray-400);
  margin-bottom: var(--spacing-xl);
  max-width: 500px;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.hero-image {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-image .placeholder-img {
  width: 100%;
  max-width: 480px;
  aspect-ratio: 1;
  background: linear-gradient(135deg, rgba(212,120,47,0.2), rgba(212,120,47,0.05));
  border-radius: var(--border-radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 6rem;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 12px 28px;
  border-radius: var(--border-radius);
  font-size: 0.95rem;
  font-weight: 600;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  border: 2px solid var(--color-white);
  color: var(--color-white);
}

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

.btn-outline-dark {
  border: 2px solid var(--color-gray-800);
  color: var(--color-gray-800);
}

.btn-outline-dark:hover {
  background: var(--color-gray-800);
  color: var(--color-white);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
  border-radius: var(--border-radius-lg);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}

.btn-full {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* ============================================
   Section Common
   ============================================ */
.section {
  padding: var(--spacing-4xl) var(--spacing-xl);
}

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

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.5px;
}

.section-header p {
  color: var(--color-gray-500);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-new {
  background: #dbeafe;
  color: #1e40af;
}

.badge-sale {
  background: #fee2e2;
  color: #991b1b;
}

.badge-preorder {
  background: #fef3c7;
  color: #92400e;
}

.badge-bestseller {
  background: #fce7f3;
  color: #9d174d;
}

/* ============================================
   Product Grid
   ============================================ */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

.product-card {
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-gray-100);
  transition: all var(--transition-base);
  position: relative;
}

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

.product-card-image {
  position: relative;
  aspect-ratio: 1;
  background: var(--color-gray-50);
  overflow: hidden;
}

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

.product-card:hover .product-card-image img {
  transform: scale(1.05);
}

.product-card-badges {
  position: absolute;
  top: 12px;
  left: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.product-card-actions {
  position: absolute;
  bottom: 12px;
  right: 12px;
  display: flex;
  gap: 8px;
  opacity: 0;
  transform: translateY(8px);
  transition: all var(--transition-base);
}

.product-card:hover .product-card-actions {
  opacity: 1;
  transform: translateY(0);
}

.quick-view-btn,
.add-cart-btn-icon {
  width: 40px;
  height: 40px;
  background: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-fast);
  font-size: 1.1rem;
}

.quick-view-btn:hover,
.add-cart-btn-icon:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.product-card-info {
  padding: var(--spacing-lg);
}

.product-card-category {
  font-size: 0.8rem;
  color: var(--color-gray-400);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-xs);
}

.product-card-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: var(--spacing-sm);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-card-price {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.price-current {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-dark);
}

.price-original {
  font-size: 0.9rem;
  color: var(--color-gray-400);
  text-decoration: line-through;
}

.price-save {
  font-size: 0.75rem;
  color: var(--color-error);
  font-weight: 600;
}

/* ============================================
   Product Detail Page
   ============================================ */
.product-detail {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-3xl) var(--spacing-xl);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: start;
}

.product-gallery {
  position: sticky;
  top: calc(var(--header-height) + 2rem);
}

.product-gallery-main {
  aspect-ratio: 1;
  background: var(--color-gray-50);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 8rem;
}

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

.product-gallery-thumb {
  width: 72px;
  height: 72px;
  border-radius: var(--border-radius);
  background: var(--color-gray-50);
  border: 2px solid transparent;
  cursor: pointer;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  transition: border-color var(--transition-fast);
}

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

.product-info h1 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.5px;
}

.product-sku {
  font-size: 0.85rem;
  color: var(--color-gray-400);
  margin-bottom: var(--spacing-lg);
}

.product-info-price {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.product-info-price .price-current {
  font-size: 2rem;
}

.product-info-price .price-original {
  font-size: 1.2rem;
}

.product-short-desc {
  color: var(--color-gray-600);
  line-height: 1.8;
  margin-bottom: var(--spacing-xl);
}

.product-features {
  margin-bottom: var(--spacing-xl);
}

.product-features li {
  padding: 6px 0;
  padding-left: 24px;
  position: relative;
  color: var(--color-gray-600);
  font-size: 0.95rem;
}

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

.product-quantity {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.quantity-label {
  font-weight: 600;
  color: var(--color-gray-700);
}

.quantity-control {
  display: flex;
  align-items: center;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.quantity-control button {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--color-gray-600);
  transition: all var(--transition-fast);
}

.quantity-control button:hover {
  background: var(--color-gray-100);
}

.quantity-control input {
  width: 56px;
  height: 40px;
  text-align: center;
  border: none;
  border-left: 1px solid var(--color-gray-200);
  border-right: 1px solid var(--color-gray-200);
  font-weight: 600;
  font-size: 0.95rem;
}

.product-actions {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

/* Product Meta */
.product-meta {
  border-top: 1px solid var(--color-gray-200);
  padding-top: var(--spacing-lg);
}

.product-meta-item {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  font-size: 0.9rem;
}

.product-meta-item .label {
  color: var(--color-gray-400);
}

.product-meta-item .value {
  color: var(--color-gray-700);
  font-weight: 500;
}

/* Product Tabs */
.product-tabs {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-xl) var(--spacing-3xl);
}

.tab-nav {
  display: flex;
  border-bottom: 2px solid var(--color-gray-200);
  margin-bottom: var(--spacing-xl);
  gap: var(--spacing-xl);
}

.tab-btn {
  padding: var(--spacing-md) 0;
  font-weight: 600;
  color: var(--color-gray-400);
  font-size: 0.95rem;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  color: var(--color-gray-600);
}

.tab-btn.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tab-content {
  display: none;
  color: var(--color-gray-600);
  line-height: 1.8;
}

.tab-content.active {
  display: block;
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
}

.specs-table tr {
  border-bottom: 1px solid var(--color-gray-100);
}

.specs-table td {
  padding: 12px var(--spacing-md);
  font-size: 0.9rem;
}

.specs-table td:first-child {
  font-weight: 600;
  color: var(--color-gray-700);
  width: 180px;
  background: var(--color-gray-50);
}

/* ============================================
   Features Section
   ============================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xl);
}

.feature-card {
  text-align: center;
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  background: var(--color-gray-50);
  transition: transform var(--transition-base);
}

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

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--color-dark);
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--color-gray-500);
}

/* ============================================
   CTA Section
   ============================================ */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary), #e8963a);
  color: var(--color-white);
  text-align: center;
  padding: var(--spacing-4xl) var(--spacing-xl);
}

.cta-section h2 {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: var(--spacing-md);
}

.cta-section p {
  font-size: 1.1rem;
  opacity: 0.9;
  margin-bottom: var(--spacing-xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   About Page
   ============================================ */
.about-hero {
  background: var(--color-gray-50);
  padding: var(--spacing-4xl) var(--spacing-xl);
  text-align: center;
}

.about-hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: var(--spacing-md);
}

.about-hero p {
  color: var(--color-gray-500);
  font-size: 1.1rem;
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.8;
}

.about-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-3xl) var(--spacing-xl);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.about-image {
  aspect-ratio: 4/3;
  background: var(--color-gray-100);
  border-radius: var(--border-radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 6rem;
}

.about-text h2 {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: var(--spacing-lg);
}

.about-text p {
  color: var(--color-gray-600);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

/* ============================================
   Cart Page
   ============================================ */
.cart-page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-3xl) var(--spacing-xl);
}

.cart-page h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: var(--spacing-2xl);
}

.cart-empty {
  text-align: center;
  padding: var(--spacing-4xl) var(--spacing-xl);
}

.cart-empty-icon {
  font-size: 5rem;
  margin-bottom: var(--spacing-lg);
  opacity: 0.3;
}

.cart-empty h2 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-gray-600);
}

.cart-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: var(--spacing-2xl);
  align-items: start;
}

.cart-items {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.cart-item {
  display: grid;
  grid-template-columns: 100px 1fr auto;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--border-radius-lg);
  align-items: center;
}

.cart-item-image {
  width: 100px;
  height: 100px;
  background: var(--color-gray-50);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}

.cart-item-info h3 {
  font-weight: 600;
  margin-bottom: 4px;
  font-size: 0.95rem;
}

.cart-item-info .sku {
  font-size: 0.8rem;
  color: var(--color-gray-400);
  margin-bottom: 8px;
}

.cart-item-price {
  font-weight: 700;
  color: var(--color-dark);
}

.cart-item-remove {
  color: var(--color-gray-400);
  font-size: 1.2rem;
  transition: color var(--transition-fast);
}

.cart-item-remove:hover {
  color: var(--color-error);
}

/* Cart Summary */
.cart-summary {
  background: var(--color-gray-50);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  position: sticky;
  top: calc(var(--header-height) + 2rem);
}

.cart-summary h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-gray-200);
}

.summary-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  font-size: 0.95rem;
  color: var(--color-gray-600);
}

.summary-row.total {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-dark);
  padding-top: var(--spacing-md);
  margin-top: var(--spacing-sm);
  border-top: 2px solid var(--color-gray-200);
}

/* ============================================
   Checkout Page
   ============================================ */
.checkout-page {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--spacing-3xl) var(--spacing-xl);
}

.checkout-page h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: var(--spacing-2xl);
}

.checkout-form {
  display: grid;
  gap: var(--spacing-2xl);
}

.form-section {
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
}

.form-section h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-gray-100);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: 4px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--border-radius);
  font-size: 0.95rem;
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(212,120,47,0.1);
}

/* Payment Methods */
.payment-methods {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
}

.payment-method {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.payment-method:hover {
  border-color: var(--color-gray-300);
}

.payment-method.selected {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.payment-method-icon {
  font-size: 2rem;
}

.payment-method-name {
  font-weight: 600;
  font-size: 0.9rem;
}

/* Order Summary (Checkout) */
.order-summary {
  background: var(--color-gray-50);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
}

.order-summary h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-gray-200);
}

.order-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  font-size: 0.9rem;
}

.order-item span:first-child {
  color: var(--color-gray-600);
}

/* ============================================
   Pre-order Page
   ============================================ */
.preorder-hero {
  background: linear-gradient(135deg, #1a1a2e, #16213e);
  color: var(--color-white);
  text-align: center;
  padding: var(--spacing-4xl) var(--spacing-xl);
}

.preorder-hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: var(--spacing-md);
}

.preorder-hero p {
  font-size: 1.1rem;
  color: var(--color-gray-400);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

.preorder-products {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-3xl) var(--spacing-xl);
}

.preorder-card {
  background: var(--color-white);
  border: 2px solid var(--color-warning);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  position: relative;
}

.preorder-timer {
  background: var(--color-warning);
  color: var(--color-dark);
  text-align: center;
  padding: var(--spacing-md);
  font-weight: 700;
  font-size: 0.9rem;
}

.preorder-timer .countdown {
  font-size: 1.2rem;
  margin-top: 4px;
}

/* ============================================
   Contact Page
   ============================================ */
.contact-page {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-3xl) var(--spacing-xl);
}

.contact-page h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.contact-page > p {
  text-align: center;
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-2xl);
}

.contact-info {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-3xl);
}

.contact-info-card {
  text-align: center;
  padding: var(--spacing-xl);
  background: var(--color-gray-50);
  border-radius: var(--border-radius-lg);
}

.contact-info-card .icon {
  font-size: 2rem;
  margin-bottom: var(--spacing-sm);
}

.contact-info-card h3 {
  font-weight: 600;
  margin-bottom: 4px;
}

.contact-info-card p {
  color: var(--color-gray-500);
  font-size: 0.9rem;
}

/* ============================================
   Toast / Notification
   ============================================ */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--color-dark);
  color: var(--color-white);
  padding: 14px 24px;
  border-radius: var(--border-radius);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow-xl);
  animation: slideIn 0.3s ease, fadeOut 0.3s ease 2.7s forwards;
  max-width: 360px;
}

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

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

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

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

/* ============================================
   Modal
   ============================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 1500;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-white);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-2xl);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(20px);
  transition: transform var(--transition-base);
}

.modal-overlay.open .modal {
  transform: translateY(0);
}

.modal h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: var(--spacing-lg);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 1.5rem;
  color: var(--color-gray-400);
  transition: color var(--transition-fast);
}

.modal-close:hover {
  color: var(--color-gray-800);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background: var(--color-dark);
  color: var(--color-gray-400);
  padding: var(--spacing-3xl) var(--spacing-xl);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-3xl);
}

.footer-brand h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.8;
}

.footer-col h4 {
  color: var(--color-white);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  font-size: 0.95rem;
}

.footer-col a {
  display: block;
  padding: 4px 0;
  font-size: 0.9rem;
  color: var(--color-gray-400);
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  max-width: var(--max-width);
  margin: var(--spacing-2xl) auto 0;
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-gray-800);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

.payment-icons {
  display: flex;
  gap: var(--spacing-sm);
  font-size: 1.5rem;
}

/* ============================================
   Filters Bar
   ============================================ */
.filters-bar {
  max-width: var(--max-width);
  margin: 0 auto var(--spacing-2xl);
  padding: 0 var(--spacing-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.filter-tags {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.filter-tag {
  padding: 6px 16px;
  border: 1px solid var(--color-gray-200);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-gray-600);
  transition: all var(--transition-fast);
}

.filter-tag:hover,
.filter-tag.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.sort-select {
  padding: 8px 32px 8px 12px;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--border-radius);
  font-size: 0.85rem;
  color: var(--color-gray-600);
  background: var(--color-white);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23737373' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
}

/* ============================================
   Success Page
   ============================================ */
.success-page {
  max-width: 600px;
  margin: 0 auto;
  padding: var(--spacing-4xl) var(--spacing-xl);
  text-align: center;
}

.success-icon {
  font-size: 5rem;
  margin-bottom: var(--spacing-lg);
}

.success-page h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: var(--spacing-md);
}

.success-page p {
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-xl);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-image { order: -1; }
  .hero-content h1 { font-size: 2.25rem; }
  
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  
  .product-detail { grid-template-columns: 1fr; }
  .product-gallery { position: static; }
  
  .cart-layout { grid-template-columns: 1fr; }
  .cart-summary { position: static; }
  
  .about-content { grid-template-columns: 1fr; }
  
  .footer-inner { grid-template-columns: 1fr 1fr; }
  
  .contact-info { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  :root { --header-height: 60px; }
  
  .nav-links { display: none; }
  .mobile-menu-btn { display: flex; }
  
  .hero { padding: var(--spacing-3xl) var(--spacing-xl); min-height: 400px; }
  .hero-content h1 { font-size: 1.75rem; }
  .hero-content p { font-size: 1rem; }
  
  .section { padding: var(--spacing-2xl) var(--spacing-xl); }
  .section-header h2 { font-size: 1.75rem; }
  
  .products-grid { grid-template-columns: repeat(2, 1fr); gap: var(--spacing-md); }
  
  .features-grid { grid-template-columns: 1fr; }
  
  .payment-methods { grid-template-columns: 1fr; }
  
  .footer-inner { grid-template-columns: 1fr; gap: var(--spacing-xl); }
  .footer-bottom { flex-direction: column; gap: var(--spacing-md); text-align: center; }
  
  .cart-item { grid-template-columns: 80px 1fr; }
  .cart-item > :last-child { grid-column: 1 / -1; justify-self: end; }
  
  .form-row { grid-template-columns: 1fr; }
  
  .checkout-page { padding: var(--spacing-xl); }
}

@media (max-width: 480px) {
  .products-grid { grid-template-columns: 1fr; }
  
  .hero-buttons { flex-direction: column; }
  .hero-buttons .btn { width: 100%; text-align: center; }
  
  .product-actions { flex-direction: column; }
  .product-actions .btn { width: 100%; }
  
  .tab-nav { gap: var(--spacing-md); overflow-x: auto; }
}