/* ============================================================
   INVALID INVENTIONS — Global Design System
   ============================================================ */

/* --- Custom Properties --- */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a26;
  --bg-card: #14141f;
  --bg-card-hover: #1c1c2b;
  --bg-overlay: rgba(0, 0, 0, 0.65);

  --text-primary: #f0f0f5;
  --text-secondary: #9595a8;
  --text-muted: #5a5a70;

  --accent-primary: #005B96;
  --accent-secondary: #005B96;
  --accent-glow: rgba(0, 91, 150, 0.35);
  --accent-gradient: #005B96;
  --accent-gradient-text: #005B96;

  --success: #00796B;
  --warning: #CC5C00;
  --danger: #ff7675;

  --border-color: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px var(--accent-glow);

  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);

  --header-height: 72px;
  --container-max: 1200px;
}

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

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

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

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

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

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

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

/* --- Page Loader --- */
.page-loader {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.page-loader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader-content {
  text-align: center;
}

.loader-logo {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 24px;
}

.loader-bracket {
  color: var(--accent-primary);
}

.loader-text {
  color: var(--accent-primary);
}

.loader-bar {
  width: 200px;
  height: 3px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.loader-bar-fill {
  height: 100%;
  background: var(--accent-primary);
  border-radius: var(--radius-full);
  animation: loaderFill 1.2s ease-in-out;
  width: 100%;
}

@keyframes loaderFill {
  from { width: 0; }
  to { width: 100%; }
}

/* --- Utility --- */
.text-gradient {
  color: var(--accent-primary);
}

/* --- Header --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition-base);
}

.site-header.scrolled {
  background: rgba(10, 10, 15, 0.95);
  box-shadow: var(--shadow-md);
}

.header-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 32px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0;
  transition: var(--transition-fast);
}

.logo:hover {
  opacity: 0.8;
}

.logo-bracket {
  color: var(--accent-primary);
  font-weight: 400;
}

.logo-name {
  color: var(--accent-primary);
  padding: 0 4px;
}

.main-nav {
  display: flex;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: var(--transition-fast);
  position: relative;
}

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

.nav-link.active {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.search-toggle,
.cart-toggle {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  transition: var(--transition-fast);
  cursor: pointer;
  position: relative;
  font-size: 1rem;
  color: var(--text-secondary);
}

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

.cart-count {
  position: absolute;
  top: 4px;
  right: 4px;
  background: var(--accent-primary);
  color: white;
  font-size: 0.65rem;
  font-weight: 700;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-spring);
  opacity: 0;
  transform: scale(0);
}

.cart-count.visible {
  opacity: 1;
  transform: scale(1);
}

/* --- Search Bar --- */
.search-bar {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
}

.search-bar.open {
  max-height: 400px;
}

.search-bar-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 16px 32px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.search-icon {
  color: var(--text-muted);
  font-size: 1rem;
}

.search-bar input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-size: 1.1rem;
  color: var(--text-primary);
}

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

.search-close {
  color: var(--text-muted);
  font-size: 1rem;
  transition: var(--transition-fast);
}

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

.search-results {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 32px;
  max-height: 300px;
  overflow-y: auto;
}

.search-result-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-fast);
}

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

.search-result-image {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
}

.search-result-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.search-result-info {
  flex: 1;
  min-width: 0;
}

.search-result-title {
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.search-result-subtitle {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.search-result-price {
  font-weight: 700;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent-secondary);
}

.search-no-results {
  padding: 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* --- Views --- */
.view {
  display: none;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.view.active {
  display: block;
}

.view.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 32px 80px;
  position: relative;
  overflow: hidden;
}

.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--accent-primary);
  border-radius: 50%;
  opacity: 0;
  animation: particleFloat 6s infinite ease-in-out;
}

@keyframes particleFloat {
  0%, 100% { opacity: 0; transform: translateY(0) scale(0); }
  20% { opacity: 0.6; transform: translateY(-30px) scale(1); }
  80% { opacity: 0.2; transform: translateY(-120px) scale(0.5); }
}

.hero-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  animation: glowPulse 4s ease-in-out infinite alternate;
}

@keyframes glowPulse {
  from { opacity: 0.3; transform: translate(-50%, -50%) scale(0.8); }
  to { opacity: 0.6; transform: translate(-50%, -50%) scale(1.2); }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero-tagline {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-secondary);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

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

/* Animate-in helper */
.animate-in {
  opacity: 0;
  transform: translateY(24px);
  animation: fadeInUp 0.7s ease forwards;
}

.animate-in:nth-child(1) { animation-delay: 0.3s; }
.animate-in:nth-child(2) { animation-delay: 0.45s; }
.animate-in:nth-child(3) { animation-delay: 0.6s; }
.animate-in:nth-child(4) { animation-delay: 0.75s; }

@keyframes fadeInUp {
  to { opacity: 1; transform: translateY(0); }
}

/* --- Buttons --- */
.button-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--accent-primary);
  color: white;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-full);
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.button-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 50%);
  opacity: 0;
  transition: var(--transition-base);
}

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

.button-primary:hover::before {
  opacity: 1;
}

.button-primary:active {
  transform: translateY(0);
}

.button-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.button-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: transparent;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-hover);
  transition: var(--transition-base);
}

.button-outline:hover {
  border-color: var(--accent-primary);
  background: rgba(0, 91, 150, 0.08);
  transform: translateY(-2px);
}

.button-outline:active {
  transform: translateY(0);
}

.button-full {
  width: 100%;
  justify-content: center;
}

.button-sm {
  padding: 10px 20px;
  font-size: 0.85rem;
}

.button-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  transition: var(--transition-fast);
  font-size: 1rem;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
}

.button-icon:hover {
  border-color: var(--accent-primary);
  color: var(--accent-secondary);
  background: rgba(0, 91, 150, 0.1);
}

/* --- Sections --- */
.section {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 80px 32px;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-title {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
}

.page-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

/* --- Product Card --- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-base);
  cursor: pointer;
  position: relative;
}

.product-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-lg), 0 0 40px rgba(0, 91, 150, 0.08);
}

.product-card-image {
  aspect-ratio: 16 / 9;
  background: var(--bg-secondary);
  position: relative;
  overflow: hidden;
}

.product-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
  border-radius: var(--radius-md);
}

.product-card:hover .product-card-image img {
  transform: scale(1.04);
}

.product-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  z-index: 2;
}

.product-badge.best-seller {
  background: var(--accent-primary);
  color: white;
}

.product-badge.new {
  background: var(--success);
  color: var(--bg-primary);
}

.product-badge.limited {
  background: var(--warning);
  color: var(--bg-primary);
}

.product-card-body {
  padding: 20px;
}

.product-card-category {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.product-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.product-card-subtitle {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.product-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.product-card-price {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.15rem;
}

.product-card-price .original-price {
  text-decoration: line-through;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 400;
  margin-left: 8px;
}

.product-card-rating {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.product-card-rating .stars {
  color: var(--warning);
}

.product-card-add {
  position: absolute;
  bottom: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  opacity: 0;
  transform: scale(0.8) translateY(8px);
  transition: var(--transition-spring);
  z-index: 3;
  box-shadow: var(--shadow-glow);
}

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

.product-card-add:hover {
  background: var(--accent-secondary);
  transform: scale(1.1) translateY(0) !important;
}

/* --- Product Detail --- */
.product-detail {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: calc(var(--header-height) + 40px) 32px 80px;
}

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

.product-gallery {
  position: sticky;
  top: calc(var(--header-height) + 40px);
}

.product-gallery-main {
  aspect-ratio: 16 / 9;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  overflow: hidden;
  margin-bottom: 16px;
}

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

.product-gallery-thumbs {
  display: flex;
  gap: 12px;
}

.product-gallery-thumb {
  flex: 1;
  aspect-ratio: 16 / 9;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 2px solid var(--border-color);
  cursor: pointer;
  transition: var(--transition-fast);
  overflow: hidden;
}

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

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

.product-gallery-main img {
  cursor: pointer;
}

/* ─── Lightbox ─── */
.lightbox-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.9);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  cursor: pointer;
}

.lightbox-overlay.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-overlay img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  transform: scale(0.92);
  transition: transform 0.3s ease;
}

.lightbox-overlay.active img {
  transform: scale(1);
}

.product-info {
  padding-top: 8px;
}

.product-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.product-breadcrumb a {
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.product-breadcrumb a:hover {
  color: var(--accent-secondary);
}

.product-info .product-badge {
  position: static;
  display: inline-block;
  margin-bottom: 12px;
}

.product-info-title {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.product-info-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.product-info-rating {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  font-size: 0.9rem;
}

.product-info-rating .stars {
  color: var(--warning);
  font-size: 1rem;
}

.product-info-rating .review-count {
  color: var(--text-secondary);
}

.product-price-block {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 24px;
}

.product-price-current {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 800;
}

.product-price-original {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--text-muted);
  text-decoration: line-through;
}

.product-price-save {
  font-size: 0.85rem;
  color: var(--warning);
  font-weight: 600;
  padding: 4px 10px;
  background: rgba(204, 92, 0, 0.1);
  border-radius: var(--radius-full);
}

.product-description {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 28px;
}

.product-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
}

.quantity-selector {
  display: flex;
  align-items: center;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  overflow: hidden;
  background: var(--bg-tertiary);
}

.quantity-selector button {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

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

.quantity-selector .quantity-value {
  width: 44px;
  text-align: center;
  font-weight: 600;
  font-family: var(--font-mono);
}

.product-features {
  margin-bottom: 32px;
}

.product-features h3 {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.features-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.feature-item i {
  color: var(--success);
  font-size: 0.75rem;
  width: 20px;
  flex-shrink: 0;
}

.product-specs {
  margin-bottom: 32px;
}

.product-specs h3 {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.specs-grid {
  display: grid;
  gap: 1px;
  background: var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.spec-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--bg-card);
}

.spec-row:nth-child(odd) {
  background: var(--bg-secondary);
}

.spec-label {
  padding: 12px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.spec-value {
  padding: 12px 16px;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--text-primary);
}

.product-shipping-info {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.product-shipping-info i {
  color: var(--success);
  font-size: 1.2rem;
}

.product-shipping-info span {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.product-shipping-info strong {
  color: var(--text-primary);
}

/* --- Trust Strip --- */
.trust-strip {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 40px 32px 80px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  transition: var(--transition-base);
}

.trust-item:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.trust-item i {
  font-size: 1.5rem;
  color: var(--accent-secondary);
  width: 32px;
  flex-shrink: 0;
}

.trust-item strong {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 2px;
}

.trust-item span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- Shop Page --- */
.shop-header {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: calc(var(--header-height) + 40px) 32px 0;
}

.shop-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 24px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.filter-chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.chip {
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 500;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: var(--transition-fast);
  cursor: pointer;
}

.chip:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
}

.chip.active {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: white;
}

.sort-control select {
  padding: 10px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--text-primary);
  font-size: 0.85rem;
  outline: none;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  padding-right: 32px;
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%239595a8'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
}

.sort-control select option {
  background: var(--bg-secondary);
}

#view-shop .product-grid {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 32px 80px;
}

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

.cart-overlay.visible {
  opacity: 1;
  visibility: visible;
}

.cart-sidebar {
  position: fixed;
  top: 0;
  right: 0;
  width: 420px;
  max-width: 100%;
  height: 100vh;
  background: var(--bg-secondary);
  z-index: 2001;
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--border-color);
}

.cart-sidebar.open {
  transform: translateX(0);
}

.cart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.cart-header h2 {
  font-size: 1.1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
}

.cart-close {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: var(--transition-fast);
  color: var(--text-secondary);
}

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

.cart-items {
  flex: 1;
  overflow-y: auto;
  padding: 16px 24px;
}

.cart-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-color);
  animation: slideInRight 0.3s ease;
}

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

.cart-item-image {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
}

.cart-item-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

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

.cart-item-title {
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cart-item-price {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-secondary);
  margin-bottom: 8px;
}

.cart-item-controls {
  display: flex;
  align-items: center;
  gap: 4px;
}

.cart-item-controls button {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  font-size: 0.75rem;
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.cart-item-controls button:hover {
  border-color: var(--accent-primary);
  color: var(--accent-secondary);
}

.cart-item-controls .cart-item-qty {
  width: 28px;
  text-align: center;
  font-weight: 600;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.cart-item-remove {
  color: var(--text-muted);
  transition: var(--transition-fast);
  font-size: 0.8rem;
  padding: 4px;
  flex-shrink: 0;
}

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

.cart-footer {
  padding: 24px;
  border-top: 1px solid var(--border-color);
  flex-shrink: 0;
}

.cart-totals {
  margin-bottom: 20px;
}

.cart-total-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.cart-total-final {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
  margin-top: 4px;
}

.cart-total-final span:last-child {
  font-family: var(--font-mono);
}

.free-shipping {
  color: var(--success);
  font-weight: 600;
}

.cart-empty {
  flex: 1;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  color: var(--text-muted);
  padding: 40px;
}

.cart-empty.visible {
  display: flex;
}

.cart-empty i {
  font-size: 3rem;
  opacity: 0.3;
}

.cart-empty p {
  font-size: 1rem;
}

/* --- Checkout --- */
.checkout-page {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: calc(var(--header-height) + 40px) 32px 80px;
}

.checkout-layout {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 48px;
  align-items: start;
}

.checkout-section {
  margin-bottom: 36px;
}

.checkout-section-title {
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.checkout-section-title .step-number {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: var(--transition-fast);
  outline: none;
}

.form-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

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

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

/* Payment Methods */
.payment-methods {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.payment-method {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-fast);
  background: var(--bg-tertiary);
  font-weight: 600;
  font-size: 0.85rem;
}

.payment-method:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.payment-method.selected {
  border-color: var(--accent-primary);
  background: rgba(0, 91, 150, 0.1);
  box-shadow: 0 0 0 1px var(--accent-primary);
}

.payment-method img {
  height: 24px;
  width: auto;
}

.payment-method i {
  font-size: 1.2rem;
}

.payment-method .payment-icon-bitcoin {
  color: #f7931a;
}

.payment-method .payment-icon-paypal {
  color: #00457c;
}

.payment-method .payment-icon-apple {
  color: #ffffff;
}

.payment-method .payment-icon-google {
  color: #4285f4;
}

/* Card form */
.card-form {
  margin-top: 20px;
  padding: 20px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

/* Order Summary in checkout */
.order-summary {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: sticky;
  top: calc(var(--header-height) + 40px);
}

.order-summary h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.order-summary-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
}

.order-summary-item-image {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
}

.order-summary-item-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.order-summary-item-info {
  flex: 1;
  min-width: 0;
}

.order-summary-item-title {
  font-weight: 600;
  font-size: 0.85rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.order-summary-item-qty {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.order-summary-item-price {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  flex-shrink: 0;
}

.order-summary-totals {
  margin-top: 16px;
}

.order-summary-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.order-summary-final {
  display: flex;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
  margin-top: 8px;
  font-size: 1.15rem;
  font-weight: 700;
}

.order-summary-final span:last-child {
  font-family: var(--font-mono);
}

.place-order-button {
  margin-top: 20px;
}

.secure-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 16px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.secure-badge i {
  color: var(--success);
}

/* --- About Page --- */
.about-page {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: calc(var(--header-height) + 60px) 32px 80px;
}

.about-hero {
  text-align: center;
  max-width: 650px;
  margin: 0 auto 64px;
}

.about-lead {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}

.stat-card {
  text-align: center;
  padding: 32px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: var(--transition-base);
}

.stat-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-4px);
}

.stat-number {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent-primary);
}

.stat-suffix {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-secondary);
}

.stat-label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.about-values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.value-card {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: var(--transition-base);
}

.value-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-4px);
}

.value-card i {
  font-size: 2rem;
  color: var(--accent-secondary);
  margin-bottom: 16px;
}

.value-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.value-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --- Confirmation Page --- */
.confirmation-page {
  max-width: 600px;
  margin: 0 auto;
  padding: calc(var(--header-height) + 80px) 32px 80px;
  text-align: center;
}

.confirmation-icon {
  font-size: 5rem;
  color: var(--success);
  margin-bottom: 24px;
  animation: confirmBounce 0.6s ease;
}

@keyframes confirmBounce {
  0% { transform: scale(0); opacity: 0; }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); opacity: 1; }
}

.confirmation-text {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.confirmation-order-number {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--accent-secondary);
  margin-bottom: 32px;
}

/* --- Toast Notifications --- */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9000;
  display: flex;
  flex-direction: column-reverse;
  gap: 8px;
}

.toast {
  padding: 14px 20px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  animation: toastIn 0.4s var(--transition-spring) forwards;
  max-width: 360px;
  backdrop-filter: blur(20px);
}

.toast.removing {
  animation: toastOut 0.3s ease forwards;
}

.toast i {
  color: var(--success);
  font-size: 1.1rem;
  flex-shrink: 0;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(20px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to { opacity: 0; transform: translateY(10px) scale(0.95); }
}

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

.footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 60px 32px 40px;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 48px;
}

.footer-brand .logo {
  margin-bottom: 12px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

.footer-column h4 {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

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

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

.footer-bottom {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 20px 32px;
  border-top: 1px solid var(--border-color);
}

.footer-bottom p {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .product-detail-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .product-gallery {
    position: relative;
    top: auto;
  }

  .checkout-layout {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }

  .header-inner {
    padding: 0 16px;
  }

  .main-nav {
    display: none;
  }

  .hero {
    padding: 100px 20px 60px;
    min-height: 80vh;
  }

  .hero-title {
    font-size: 2rem;
  }

  .section {
    padding: 48px 20px;
  }

  .product-grid {
    grid-template-columns: 1fr;
  }

  .trust-strip {
    grid-template-columns: 1fr;
    padding: 24px 20px 48px;
  }

  .about-stats {
    grid-template-columns: 1fr 1fr;
  }

  .about-values {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    padding: 40px 20px 24px;
  }

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

  .cart-sidebar {
    width: 100%;
  }

  .features-list {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .payment-methods {
    grid-template-columns: 1fr;
  }

  .shop-header {
    padding: calc(var(--header-height) + 24px) 20px 0;
  }

  #view-shop .product-grid {
    padding: 0 20px 60px;
  }

  .product-detail {
    padding: calc(var(--header-height) + 24px) 20px 60px;
  }

  .checkout-page {
    padding: calc(var(--header-height) + 24px) 20px 60px;
  }

  .about-page {
    padding: calc(var(--header-height) + 40px) 20px 60px;
  }

  .confirmation-page {
    padding: calc(var(--header-height) + 60px) 20px 60px;
  }
}

@media (max-width: 480px) {
  .footer-links {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }
}