:root {
  --bg-page: #F6F8F9;
  --bg-surface: #FFFFFF;
  --bg-subtle: #EDF2F4;
  --text-main: #101820;
  --text-muted: #536471;
  --border-subtle: #DDE5EA;
  --accent: #1559D6;
  --accent-hover: #0E44A7;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-pill: 9999px;
  --max-w: 1200px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-page: #0D1318;
    --bg-surface: #141C24;
    --bg-subtle: #1C2732;
    --text-main: #F3F7FA;
    --text-muted: #95A5B5;
    --border-subtle: #253342;
    --accent: #3A7BFD;
    --accent-hover: #5891FE;
  }
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 32px;
  height: 32px;
  border-radius: 6px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-link {
  font-size: 0.95rem;
  color: var(--text-muted);
  transition: color 0.15s ease;
}

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

.cart-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 600;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.cart-pill:hover {
  border-color: var(--accent);
}

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 700;
}

.main-content {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  padding: 40px 0 64px;
}

.hero-copy {
  max-width: 540px;
}

.eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 12px;
}

.hero-title {
  font-size: 3rem;
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 800;
  margin-bottom: 16px;
}

.hero-sub {
  font-size: 1.125rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.1s ease, background 0.15s ease;
}

.btn:active {
  transform: scale(0.98);
}

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

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

.btn-secondary {
  background: var(--bg-surface);
  border-color: var(--border-subtle);
  color: var(--text-main);
}

.btn-secondary:hover {
  border-color: var(--accent);
}

.hero-media {
  position: relative;
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.section-head {
  margin: 48px 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.section-title {
  font-size: 1.75rem;
  letter-spacing: -0.02em;
  font-weight: 700;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.product-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.product-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.card-image-wrap {
  aspect-ratio: 4 / 5;
  background: var(--bg-subtle);
  overflow: hidden;
}

.card-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}

.card-price {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 12px;
}

.card-desc {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.45;
  margin-bottom: 20px;
  flex-grow: 1;
}

.product-detail-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: flex-start;
  padding: 24px 0;
}

.product-gallery {
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
}

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

.product-info {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 32px;
}

.product-info h1 {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.product-info .price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 24px;
}

.product-info .description {
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 28px;
}

.product-info .description ul {
  padding-left: 20px;
  margin-top: 12px;
}

.product-info .description li {
  margin-bottom: 6px;
}

.cart-table-wrap {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 32px;
}

.cart-item {
  display: grid;
  grid-template-columns: 80px 1fr auto auto;
  gap: 20px;
  align-items: center;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.cart-item:last-child {
  border-bottom: none;
}

.cart-item-img {
  width: 80px;
  height: 100px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  background: var(--bg-subtle);
}

.qty-control {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.qty-btn {
  background: var(--bg-surface);
  border: none;
  width: 32px;
  height: 32px;
  font-size: 1rem;
  cursor: pointer;
  color: var(--text-main);
}

.qty-btn:hover {
  background: var(--bg-subtle);
}

.qty-num {
  padding: 0 10px;
  font-size: 0.9rem;
  font-weight: 600;
}

.cart-summary {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  max-width: 420px;
  margin-left: auto;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  font-size: 1rem;
}

.summary-total {
  border-top: 1px solid var(--border-subtle);
  margin-top: 12px;
  padding-top: 16px;
  font-size: 1.25rem;
  font-weight: 800;
}

.site-footer {
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  padding: 40px 24px;
  margin-top: 60px;
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-muted);
}

@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .product-grid {
    grid-template-columns: 1fr;
  }
  .product-detail-layout {
    grid-template-columns: 1fr;
  }
  .cart-item {
    grid-template-columns: 60px 1fr;
    grid-template-rows: auto auto;
  }
  .cart-summary {
    max-width: 100%;
    margin-left: 0;
  }
}