* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #141414;
  --bg-card: #1a1a1a;
  --bg-soft: #111111;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --text-muted: #777777;
  --border-color: #2a2a2a;
  --accent: #00d4ff;
  --accent-soft: rgba(0, 212, 255, 0.12);
  --green: #4ade80;
  --green-soft: rgba(74, 222, 128, 0.12);
  --radius: 18px;
}

[data-theme="light"] {
  --bg-primary: #f6f7f9;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-soft: #f1f3f5;
  --text-primary: #121212;
  --text-secondary: #5c5c5c;
  --text-muted: #8a8a8a;
  --border-color: #d9dde3;
  --accent: #0099cc;
  --accent-soft: rgba(0, 153, 204, 0.1);
  --green: #16a34a;
  --green-soft: rgba(22, 163, 74, 0.1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro", "Segoe UI", Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background 0.25s ease, color 0.25s ease;
}

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

img {
  display: block;
  width: 100%;
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 40px;
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
}

[data-theme="light"] .navbar {
  background: rgba(255, 255, 255, 0.92);
}

.nav-brand {
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 15px;
}

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

.theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  width: 36px;
  height: 36px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  border-radius: 999px;
}

.hero {
  padding: 110px 40px 72px;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  border-bottom: 1px solid var(--border-color);
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 24px;
  align-items: stretch;
}

.hero-label {
  display: inline-block;
  margin-bottom: 14px;
  padding: 6px 10px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 999px;
}

.hero-title {
  font-size: 60px;
  line-height: 1.04;
  margin-bottom: 10px;
}

.hero-subtitle {
  font-size: 21px;
  color: var(--text-secondary);
  margin-bottom: 18px;
}

.hero-desc {
  max-width: 700px;
  color: var(--text-secondary);
  font-size: 16px;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  gap: 14px;
}

.store-summary-card {
  height: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 24px;
  display: grid;
  gap: 14px;
  border-radius: var(--radius);
}

.summary-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-color);
}

.summary-line:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.summary-line span {
  color: var(--text-secondary);
}

.summary-line strong {
  font-size: 15px;
}

.section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 40px;
}

.section-header {
  margin-bottom: 24px;
}

.section-header h2 {
  font-size: 34px;
  margin-bottom: 8px;
}

.section-header p {
  color: var(--text-secondary);
}

.featured-product-card {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  overflow: hidden;
  border-radius: var(--radius);
}

.featured-product-card .product-image img {
  object-fit: contain;
  background: var(--bg-soft);
}

.ratio-16x9 {
  aspect-ratio: 16 / 9;
}

.product-image {
  background: var(--bg-soft);
  overflow: hidden;
}

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

.card-hover {
  transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}

.card-hover:hover {
  transform: scale(1.02);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
  border-color: rgba(0, 212, 255, 0.28);
}


.featured-body,
.product-content {
  padding: 24px;
}

.product-badge,
.product-tag {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.boxed-tag {
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid currentColor;
  margin-bottom: 0;
}

.boxed-tag-cyan {
  color: var(--accent);
  background: var(--accent-soft);
}

.boxed-tag-green {
  color: var(--green);
  background: var(--green-soft);
}

.featured-body h3,
.product-content h3 {
  font-size: 30px;
  margin-bottom: 8px;
}

.store-card .product-content h3 {
  font-size: 24px;
}

.featured-subtitle,
.product-desc {
  color: var(--text-secondary);
}

.featured-desc {
  color: var(--text-secondary);
  margin-top: 10px;
}

.feature-points {
  margin: 18px 0 0 18px;
  color: var(--text-secondary);
}

.feature-points li + li {
  margin-top: 6px;
}

.featured-footer,
.card-bottom {
  margin-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.featured-buttons {
  display: flex;
  gap: 12px;
}

.old-price {
  display: block;
  color: var(--text-muted);
  text-decoration: line-through;
  font-size: 14px;
}

.price {
  font-size: 30px;
  font-weight: 700;
  color: var(--accent);
}

.catalog-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}

.catalog-tab {
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  min-height: 40px;
  padding: 0 14px;
  cursor: pointer;
  border-radius: 999px;
}

.catalog-tab.active {
  color: var(--text-primary);
  border-color: var(--accent);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.store-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  overflow: hidden;
  border-radius: var(--radius);
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.stock-tag {
  font-size: 12px;
  text-transform: uppercase;
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.benefit-card,
.contact-box,
.detail-main-card,
.detail-side-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 24px;
  border-radius: var(--radius);
}

.payment-panel {
  margin-top: 18px;
  padding: 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: 18px;
}

.payment-panel h4 {
  margin: 0 0 14px;
  font-size: 16px;
  color: var(--text-primary);
  font-weight: 600;
}

.payment-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.payment-item {
  min-height: 88px;
  border-radius: 14px;
  background: #ffffff;
  color: #1a1a1a;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-weight: 700;
  font-size: 14px;
  padding: 10px;
}

.payment-item.dark {
  background: #1b1d26;
  color: #ffffff;
}

.payment-item span {
  display: block;
  line-height: 1.25;
}

.benefit-card h3 {
  font-size: 22px;
  margin-bottom: 8px;
}

.benefit-card p,
.detail-copy p,
.detail-side-card p,
.detail-feature-list li {
  color: var(--text-secondary);
}

.contact-box {
  display: flex;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
  border-radius: 12px;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: #0a0a0a;
}

[data-theme="light"] .store-card .btn-primary {
  color: #ffffff;
}

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

.detail-page {
  padding: 64px 40px 80px;
}

.detail-main-card .product-image {
  border-radius: 16px;
}

.detail-main-card .product-image img {
  border-radius: 16px;
}

.detail-layout {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
}

.detail-copy h1 {
  font-size: 48px;
  line-height: 1.06;
  margin: 12px 0 10px;
}

.detail-subtitle {
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.detail-feature-list {
  margin: 18px 0 0 18px;
}

.detail-price {
  font-size: 36px;
  font-weight: 700;
  color: var(--accent);
  margin: 18px 0;
}

.detail-actions {
  display: flex;
  gap: 14px;
  margin-top: 20px;
}

.detail-side-actions {
  margin: 18px 0 20px;
}

.detail-side-actions .btn {
  width: 100%;
}

.detail-side-card h3 {
  margin-bottom: 12px;
  font-size: 22px;
}

.side-meta {
  display: grid;
  gap: 12px;
}

.side-meta-item {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.side-meta-item:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

@media (max-width: 980px) {
  .hero-content,
  .featured-product-card,
  .benefits-grid,
  .detail-layout {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 720px) {
  .navbar,
  .hero,
  .section,
  .detail-page {
    padding-left: 16px;
    padding-right: 16px;
  }

  .navbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 14px;
  }

  .hero {
    padding-top: 72px;
  }

  .hero-title,
  .detail-copy h1 {
    font-size: 40px;
  }

  .hero-actions,
  .featured-footer,
  .featured-buttons,
  .card-bottom,
  .contact-box,
  .detail-actions {
    flex-direction: column;
    align-items: stretch;
  }
}