/* ============ CSS Variables ============ */
:root {
  --bg-primary: #0a0a0b;
  --bg-secondary: #111113;
  --bg-tertiary: #18181b;
  --bg-card: #1a1a1d;
  --bg-hover: #222225;
  
  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  
  --accent: #f97316;
  --accent-hover: #fb923c;
  --accent-muted: rgba(249, 115, 22, 0.15);
  
  --success: #22c55e;
  --error: #ef4444;
  
  --border: #27272a;
  --border-light: #3f3f46;
  
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 40px rgba(249, 115, 22, 0.2);
  
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
}

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

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

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

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

/* ============ Header ============ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 11, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  transition: opacity var(--transition);
}

.logo:hover {
  opacity: 0.8;
}

.logo-icon {
  font-size: 1.6rem;
}

.nav {
  display: flex;
  gap: 32px;
}

.nav-link {
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.search-btn,
.cart-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition);
  position: relative;
}

.search-btn:hover,
.cart-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.cart-count {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 18px;
  height: 18px;
  background: var(--accent);
  color: white;
  font-size: 11px;
  font-weight: 600;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

.cart-count:empty,
.cart-count[data-count="0"] {
  display: none;
}

/* ============ Search Modal ============ */
.search-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

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

.search-modal-content {
  max-width: 600px;
  margin: 80px auto 0;
  position: relative;
}

.search-input {
  width: 100%;
  padding: 20px 60px 20px 24px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  font-size: 1.2rem;
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition);
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-input:focus {
  border-color: var(--accent);
}

.search-close {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  transition: color var(--transition);
}

.search-close:hover {
  color: var(--text-primary);
}

.search-results {
  max-width: 600px;
  margin: 16px auto 0;
  max-height: 400px;
  overflow-y: auto;
}

.search-result-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  margin-bottom: 8px;
  transition: background var(--transition);
}

.search-result-item:hover {
  background: var(--bg-tertiary);
}

.search-result-img {
  width: 60px;
  height: 60px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.search-result-info h4 {
  font-weight: 500;
  margin-bottom: 4px;
}

.search-result-info p {
  color: var(--accent);
  font-weight: 600;
}

/* ============ Main Layout ============ */
.main {
  min-height: calc(100vh - 72px - 300px);
}

/* ============ Hero Section ============ */
.hero {
  padding: 80px 24px;
  text-align: center;
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(249, 115, 22, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--accent-muted);
  border: 1px solid rgba(249, 115, 22, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 24px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--bg-hover);
  border-color: var(--border-light);
}

.btn-sm {
  padding: 10px 20px;
  font-size: 0.9rem;
}

.btn-lg {
  padding: 18px 36px;
  font-size: 1.1rem;
}

.btn-icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: var(--radius-full);
}

/* ============ Categories ============ */
.categories-section {
  padding: 60px 24px;
  max-width: 1400px;
  margin: 0 auto;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
  flex-wrap: wrap;
  gap: 16px;
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 600;
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
}

.category-card {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition);
}

.category-card:hover {
  transform: scale(1.02);
}

.category-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.category-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 60%);
}

.category-card-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 20px;
  z-index: 1;
}

.category-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
}

/* ============ Products Grid ============ */
.products-section {
  padding: 60px 24px;
  max-width: 1400px;
  margin: 0 auto;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.product-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  border: 1px solid var(--border);
}

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

.product-image-container {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
  background: var(--bg-tertiary);
}

.product-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

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

.product-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 6px 12px;
  background: var(--accent);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.product-quick-add {
  position: absolute;
  bottom: 12px;
  left: 12px;
  right: 12px;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--transition);
}

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

.product-info {
  padding: 20px;
}

.product-category {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.product-name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 500;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-price {
  display: flex;
  align-items: center;
  gap: 10px;
}

.price-current {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent);
}

.price-compare {
  font-size: 0.95rem;
  color: var(--text-muted);
  text-decoration: line-through;
}

.trend-score {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  background: var(--accent-muted);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  margin-top: 12px;
}

/* ============ Product Detail Page ============ */
.product-detail {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px;
}

.product-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

@media (max-width: 768px) {
  .product-detail-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

.product-gallery {
  position: sticky;
  top: 100px;
}

.product-main-image {
  aspect-ratio: 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-tertiary);
  margin-bottom: 16px;
}

.product-main-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-detail-info {
  padding-top: 20px;
}

.product-detail-category {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.product-detail-name {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
}

.product-detail-price {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

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

.product-detail-price .price-compare {
  font-size: 1.2rem;
}

.product-detail-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
}

.product-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 32px;
}

.quantity-selector {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.quantity-btn {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.quantity-btn:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

.quantity-value {
  width: 48px;
  text-align: center;
  font-weight: 600;
}

.product-meta {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.product-meta-item {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-secondary);
}

.product-meta-item svg {
  color: var(--accent);
}

/* ============ Cart Page ============ */
.cart-page {
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 24px;
}

.cart-header {
  margin-bottom: 40px;
}

.cart-header h1 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
}

.cart-empty {
  text-align: center;
  padding: 80px 24px;
}

.cart-empty-icon {
  font-size: 4rem;
  margin-bottom: 24px;
}

.cart-empty h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.cart-empty p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.cart-items {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 32px;
}

.cart-item {
  display: flex;
  gap: 20px;
  padding: 20px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

.cart-item-image {
  width: 100px;
  height: 100px;
  border-radius: var(--radius-md);
  overflow: hidden;
  flex-shrink: 0;
}

.cart-item-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cart-item-info {
  flex: 1;
}

.cart-item-name {
  font-family: var(--font-display);
  font-weight: 500;
  margin-bottom: 8px;
}

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

.cart-item-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 12px;
}

.cart-item-remove {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color var(--transition);
}

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

.cart-item-total {
  font-size: 1.2rem;
  font-weight: 700;
  white-space: nowrap;
}

.cart-summary {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 24px;
}

.cart-summary-row {
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
}

.cart-summary-row.total {
  border-top: 1px solid var(--border);
  margin-top: 12px;
  padding-top: 20px;
  font-size: 1.2rem;
  font-weight: 700;
}

.cart-checkout-btn {
  width: 100%;
  margin-top: 20px;
}

/* ============ Checkout Page ============ */
.checkout-page {
  max-width: 600px;
  margin: 0 auto;
  padding: 40px 24px;
}

.checkout-header {
  text-align: center;
  margin-bottom: 40px;
}

.checkout-header h1 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
}

.checkout-form {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 32px;
}

.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: 8px;
}

.form-input {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  color: var(--text-primary);
  transition: border-color var(--transition);
}

.form-input::placeholder {
  color: var(--text-muted);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.checkout-summary {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

/* ============ Category Page ============ */
.category-hero {
  padding: 60px 24px;
  text-align: center;
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.category-hero h1 {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.category-hero p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.filters-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  max-width: 1400px;
  margin: 0 auto;
  flex-wrap: wrap;
  gap: 16px;
}

.filter-select {
  padding: 10px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.95rem;
  cursor: pointer;
}

/* ============ Footer ============ */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  margin-top: 80px;
}

.footer-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 60px 24px;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 60px;
}

@media (max-width: 768px) {
  .footer-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

.footer-brand .logo-icon {
  font-size: 2rem;
}

.footer-brand .logo-text {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
}

.footer-tagline {
  color: var(--text-secondary);
  margin-top: 12px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

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

.footer-section h4 {
  font-family: var(--font-display);
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-section a {
  display: block;
  color: var(--text-secondary);
  padding: 6px 0;
  transition: color var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ============ Toast Notifications ============ */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.toast {
  padding: 16px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.3s ease;
  display: flex;
  align-items: center;
  gap: 12px;
}

.toast.success {
  border-color: var(--success);
}

.toast.error {
  border-color: var(--error);
}

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

/* ============ Loading States ============ */
.skeleton {
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-hover) 50%, var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

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

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 40px auto;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============ Mobile Responsive ============ */
@media (max-width: 768px) {
  .header-container {
    padding: 0 16px;
  }
  
  .nav {
    display: none;
  }
  
  .hero {
    padding: 60px 16px;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  
  .product-info {
    padding: 12px;
  }
  
  .product-name {
    font-size: 0.95rem;
  }
  
  .cart-item {
    flex-direction: column;
  }
  
  .cart-item-image {
    width: 100%;
    height: 150px;
  }
}