:root {
  --color-primary: #ff5d62;
  --color-primary-dark: #e64c51;
  --color-text: #1a1a1a;
  --color-text-secondary: #555;
  --color-muted: #888;
  --color-bg: #ffffff;
  --color-bg-soft: #f7f7f7;
  --color-border: #e8e8e8;
  --color-success: #22c55e;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
  --max-width: 1280px;
  --header-height: 72px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--color-text);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.main-nav a {
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color 0.2s;
}

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

.cart-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.cart-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 22px;
  padding: 0 6px;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 999px;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  background: var(--color-primary);
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
}

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

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-outline:hover { background: var(--color-bg-soft); }

.btn-sm { padding: 0.5rem 1rem; font-size: 0.85rem; }

/* Hero */
.hero {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  background-size: cover;
  background-position: center;
  color: #fff;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(0,0,0,0.55), rgba(0,0,0,0.2));
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.15rem;
  margin-bottom: 2rem;
  opacity: 0.95;
}

/* Trust badges */
.trust-bar {
  background: var(--color-bg-soft);
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--color-border);
}

.trust-list {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.trust-list span { display: flex; align-items: center; gap: 0.5rem; }

/* Section */
.section {
  padding: 4rem 0;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 2rem;
  text-align: center;
}

/* Product grid */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.75rem;
}

.product-card {
  background: var(--color-bg);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
  cursor: pointer;
}

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

.product-card .image-wrap {
  position: relative;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: var(--color-bg-soft);
}

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

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

.product-card .info { padding: 1.25rem; }

.product-card .category {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-muted);
  margin-bottom: 0.25rem;
}

.product-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.product-card .price-row {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
}

.price {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
}

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

/* Product detail */
.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  padding: 3rem 0;
}

.gallery-main {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-bg-soft);
  aspect-ratio: 1 / 1;
}

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

.gallery-thumbs {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
}

.gallery-thumbs img {
  width: 72px;
  height: 72px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: border-color 0.2s;
}

.gallery-thumbs img:hover, .gallery-thumbs img.active { border-color: var(--color-primary); }

.detail-info h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.detail-info .subtitle {
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
}

.detail-info .price-row {
  margin-bottom: 1.5rem;
}

.detail-info .price {
  font-size: 1.75rem;
}

.bullets {
  margin: 1.5rem 0;
  padding-left: 1.25rem;
}

.bullets li {
  margin-bottom: 0.5rem;
  color: var(--color-text-secondary);
}

.description {
  color: var(--color-text-secondary);
  margin: 1.5rem 0;
}

.qty-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 1.5rem 0;
}

.qty-row label { font-weight: 500; }

.qty-row input {
  width: 80px;
  padding: 0.6rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  text-align: center;
}

/* Cart */
.cart-page { padding: 3rem 0; }

.cart-page h1 { font-size: 2rem; margin-bottom: 1.5rem; }

.cart-empty {
  text-align: center;
  padding: 4rem 0;
  color: var(--color-text-secondary);
}

.cart-empty h2 { margin-bottom: 1rem; }

.cart-item {
  display: flex;
  gap: 1.25rem;
  padding: 1.25rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 1rem;
}

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

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

.cart-item h4 { font-weight: 600; margin-bottom: 0.25rem; }

.cart-item .unit-price { color: var(--color-muted); font-size: 0.9rem; }

.cart-summary {
  background: var(--color-bg-soft);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-top: 1.5rem;
  max-width: 420px;
  margin-left: auto;
}

.cart-summary .row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  color: var(--color-text-secondary);
}

.cart-summary .total {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  border-top: 1px solid var(--color-border);
  padding-top: 0.75rem;
  margin-top: 0.75rem;
}

/* Checkout */
.checkout-page { padding: 3rem 0; }

.checkout-page h1 { font-size: 2rem; margin-bottom: 0.5rem; }

.checkout-page .subtitle { color: var(--color-text-secondary); margin-bottom: 2rem; }

.checkout-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
}

.checkout-form {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem;
}

.form-section {
  margin-bottom: 1.75rem;
}

.form-section h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.form-group { margin-bottom: 1rem; }

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.35rem;
  color: var(--color-text-secondary);
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
}

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

.order-summary {
  background: var(--color-bg-soft);
  border-radius: var(--radius);
  padding: 1.5rem;
  height: fit-content;
}

.order-summary h3 { margin-bottom: 1rem; }

.mini-item {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.mini-item img {
  width: 50px;
  height: 50px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.mini-item .qty { color: var(--color-muted); font-size: 0.85rem; }

/* Success */
.success-page {
  text-align: center;
  padding: 5rem 0;
}

.success-page h1 { font-size: 2.25rem; margin-bottom: 1rem; }

.success-page .status {
  display: inline-block;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.success-page .status.paid { background: #dcfce7; color: #166534; }
.success-page .status.pending { background: #fef3c7; color: #92400e; }
.success-page .status.failed { background: #fee2e2; color: #991b1b; }

.order-no {
  font-family: monospace;
  font-size: 1.1rem;
  background: var(--color-bg-soft);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-bottom: 1.5rem;
}

/* Payment frame */
.payment-frame-wrapper {
  margin-top: 2rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

iframe {
  width: 100%;
  height: 620px;
  border: none;
  display: block;
}

/* Footer */
.site-footer {
  background: var(--color-bg-soft);
  border-top: 1px solid var(--color-border);
  padding: 4rem 0 1.5rem;
  margin-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 2rem;
  margin-bottom: 3rem;
}

.footer-brand {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.footer-tagline { color: var(--color-text-secondary); }

.footer-grid h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-grid ul { list-style: none; }

.footer-grid li { margin-bottom: 0.5rem; }

.footer-grid a { color: var(--color-text-secondary); transition: color 0.2s; }

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

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 1.5rem;
  text-align: center;
  color: var(--color-muted);
  font-size: 0.9rem;
}

/* Loading */
.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

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

/* Responsive */
@media (max-width: 900px) {
  .product-detail { grid-template-columns: 1fr; gap: 2rem; }
  .checkout-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  :root { --header-height: 64px; }
  .main-nav { display: none; }
  .mobile-menu-btn { display: block; }
  .hero { min-height: 420px; text-align: center; }
  .hero-content { margin: 0 auto; }
  .trust-list { gap: 1rem; }
  .cart-item { flex-direction: column; }
  .cart-item img { width: 100%; height: auto; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}