/* ============ CSS Variables ============ */
:root {
  --bg: #FFFFFF;
  --bg-secondary: #F5F4F1;
  --bg-tertiary: #EDEBE6;
  --text: #1A1A1A;
  --text-secondary: #707070;
  --text-light: #A0A0A0;
  --border: #E0DED9;
  --border-light: #EEECE7;
  --accent: #1A1A1A;
  --accent-hover: #454545;
  --error: #C0392B;
  --success: #2E7D32;
  --radius: 4px;
  --radius-lg: 8px;
  --font-heading: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --transition: 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --header-height: 68px;
}

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

html { font-size: 16px; -webkit-text-size-adjust: 100%; }

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

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, select, textarea { font-family: inherit; font-size: inherit; }
ul, ol { list-style: none; }

/* ============ Typography ============ */
h1, h2, h3, h4 { font-family: var(--font-heading); font-weight: 400; line-height: 1.2; }
h1 { font-size: 2.8rem; letter-spacing: -0.5px; }
h2 { font-size: 2rem; letter-spacing: -0.3px; }
h3 { font-size: 1.4rem; }
h4 { font-size: 1.1rem; }

/* ============ Header ============ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border-light);
  height: var(--header-height);
}
.header-inner {
  max-width: 1320px; margin: 0 auto; padding: 0 32px;
  display: flex; align-items: center; justify-content: space-between;
  height: 100%;
}
.logo {
  font-family: var(--font-heading);
  font-size: 1.6rem; letter-spacing: 3px;
  font-weight: 400; text-transform: uppercase;
}
.nav-links { display: flex; gap: 36px; }
.nav-links a {
  font-size: 0.85rem; text-transform: uppercase; letter-spacing: 1.5px;
  color: var(--text-secondary); transition: var(--transition);
  padding: 4px 0; border-bottom: 1px solid transparent;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); border-bottom-color: var(--text); }

.header-icons { display: flex; gap: 20px; align-items: center; }
.header-icons button {
  position: relative; font-size: 1.2rem; color: var(--text);
  transition: var(--transition);
}
.header-icons button:hover { opacity: 0.6; }
.cart-count {
  position: absolute; top: -8px; right: -10px;
  background: var(--accent); color: #fff;
  font-size: 0.65rem; font-weight: 600;
  width: 18px; height: 18px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  transition: transform 0.2s;
}
.cart-count:empty { display: none; }
.cart-count.bump { animation: bump 0.3s ease; }
@keyframes bump {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.35); }
}

/* ============ Hero ============ */
.hero {
  height: calc(100vh - var(--header-height));
  min-height: 520px;
  background: var(--bg-secondary);
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  position: relative; overflow: hidden;
}
.hero-content { position: relative; z-index: 2; padding: 0 24px; }
.hero-content p {
  font-size: 0.8rem; text-transform: uppercase; letter-spacing: 4px;
  color: var(--text-secondary); margin-bottom: 20px;
}
.hero-content h1 {
  font-size: 3.8rem; font-weight: 300; letter-spacing: 2px;
  margin-bottom: 24px;
}
.hero-cta {
  display: inline-block; background: var(--accent); color: #fff;
  padding: 14px 40px; font-size: 0.8rem; text-transform: uppercase;
  letter-spacing: 2px; border-radius: var(--radius);
  transition: var(--transition);
}
.hero-cta:hover { background: var(--accent-hover); }

/* ============ Sections ============ */
.section { padding: 80px 0; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-header h2 { font-size: 2rem; margin-bottom: 8px; }
.section-header p { color: var(--text-secondary); font-size: 0.9rem; }
.container { max-width: 1320px; margin: 0 auto; padding: 0 32px; }

/* ============ Product Grid ============ */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.product-card {
  cursor: pointer; transition: var(--transition);
}
.product-card:hover { transform: translateY(-4px); }
.product-card .card-image {
  aspect-ratio: 3/4;
  background: var(--bg-secondary);
  position: relative; overflow: hidden;
  margin-bottom: 12px;
}
.product-card .card-image .placeholder-img {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #e8e6e0 0%, #d5d1c8 100%);
  color: #b0ada6; font-size: 0.75rem;
  text-transform: uppercase; letter-spacing: 2px;
}
.product-card .card-name {
  font-size: 0.85rem; font-weight: 500; margin-bottom: 4px;
}
.product-card .card-price {
  font-size: 0.85rem; color: var(--text-secondary);
}
.product-card .card-price .original {
  text-decoration: line-through; margin-left: 6px; font-size: 0.8rem;
}

/* ============ Buttons ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 28px; font-size: 0.8rem; text-transform: uppercase;
  letter-spacing: 1.5px; border-radius: var(--radius);
  transition: var(--transition); font-weight: 500;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-outline {
  border: 1px solid var(--border); color: var(--text);
  background: transparent;
}
.btn-outline:hover { border-color: var(--text); }
.btn-sm { padding: 8px 16px; font-size: 0.72rem; letter-spacing: 1px; }
.btn-lg { padding: 16px 40px; font-size: 0.85rem; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ============ Footer ============ */
.site-footer {
  border-top: 1px solid var(--border-light);
  padding: 48px 0 32px;
  background: var(--bg-secondary);
}
.footer-inner {
  max-width: 1320px; margin: 0 auto; padding: 0 32px;
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 48px;
}
.footer-col h4 {
  font-family: var(--font-body); font-size: 0.75rem;
  text-transform: uppercase; letter-spacing: 2px;
  margin-bottom: 16px; color: var(--text-secondary);
}
.footer-col a, .footer-col p {
  font-size: 0.85rem; color: var(--text-secondary);
  display: block; margin-bottom: 8px;
}
.footer-bottom {
  max-width: 1320px; margin: 32px auto 0; padding: 0 32px;
  border-top: 1px solid var(--border-light);
  padding-top: 20px;
  font-size: 0.75rem; color: var(--text-light);
}

/* ============ Shop Page ============ */
.shop-layout { display: flex; gap: 48px; padding-top: 40px; }
.shop-sidebar { width: 220px; flex-shrink: 0; }
.shop-main { flex: 1; }

.filter-group { margin-bottom: 28px; }
.filter-group h4 {
  font-family: var(--font-body); font-size: 0.7rem;
  text-transform: uppercase; letter-spacing: 2px;
  color: var(--text-secondary); margin-bottom: 12px;
}
.filter-group label {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.85rem; color: var(--text-secondary);
  padding: 4px 0; cursor: pointer; transition: var(--transition);
}
.filter-group label:hover, .filter-group label.selected { color: var(--text); }
.filter-group input[type="checkbox"] { accent-color: var(--accent); }

.shop-toolbar {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 24px;
}
.shop-toolbar span { font-size: 0.8rem; color: var(--text-light); }
.shop-toolbar select {
  padding: 6px 12px; border: 1px solid var(--border);
  border-radius: var(--radius); font-size: 0.8rem;
  background: var(--bg); cursor: pointer;
}

/* ============ Product Detail ============ */
.product-detail { display: flex; gap: 64px; padding: 48px 0; }
.product-gallery { flex: 1; max-width: 560px; }
.product-gallery .main-image {
  aspect-ratio: 3/4;
  background: var(--bg-secondary);
  margin-bottom: 12px;
  display: flex; align-items: center; justify-content: center;
}
.product-info { flex: 1; max-width: 480px; padding-top: 12px; }
.product-info .breadcrumb {
  font-size: 0.75rem; color: var(--text-light);
  text-transform: uppercase; letter-spacing: 1px; margin-bottom: 16px;
}
.product-info h1 { font-size: 2rem; margin-bottom: 8px; }
.product-info .price { font-size: 1.3rem; margin-bottom: 24px; }
.product-info .desc {
  font-size: 0.9rem; color: var(--text-secondary);
  line-height: 1.8; margin-bottom: 28px;
}

.option-group { margin-bottom: 20px; }
.option-group h4 {
  font-family: var(--font-body); font-size: 0.7rem;
  text-transform: uppercase; letter-spacing: 2px;
  color: var(--text-secondary); margin-bottom: 10px;
}
.option-btns { display: flex; flex-wrap: wrap; gap: 8px; }
.option-btn {
  padding: 8px 20px; border: 1px solid var(--border);
  border-radius: var(--radius); font-size: 0.8rem;
  transition: var(--transition); color: var(--text);
}
.option-btn:hover { border-color: var(--text); }
.option-btn.selected { background: var(--accent); color: #fff; border-color: var(--accent); }

.quantity-row {
  display: flex; align-items: center; gap: 16px;
  margin: 28px 0;
}
.qty-btn {
  width: 36px; height: 36px; border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; color: var(--text);
  transition: var(--transition); border-radius: var(--radius);
}
.qty-btn:hover { background: var(--bg-secondary); }
.qty-input {
  width: 56px; text-align: center; border: 1px solid var(--border);
  padding: 8px; border-radius: var(--radius); font-size: 0.9rem;
}

.add-to-cart-btn { width: 100%; margin-top: 8px; }

/* ============ Cart Page ============ */
.cart-layout { display: flex; gap: 48px; padding: 40px 0; align-items: flex-start; }
.cart-items { flex: 1; }
.cart-summary {
  width: 360px; flex-shrink: 0; background: var(--bg-secondary);
  padding: 28px; border-radius: var(--radius-lg);
  position: sticky; top: calc(var(--header-height) + 20px);
}
.cart-summary h3 { font-family: var(--font-body); font-size: 1rem; margin-bottom: 20px; }
.summary-row {
  display: flex; justify-content: space-between;
  font-size: 0.9rem; margin-bottom: 12px;
}
.summary-row.total { font-weight: 600; font-size: 1.05rem; border-top: 1px solid var(--border); padding-top: 12px; margin-top: 12px; }
.summary-row.shipping { color: var(--success); }

.cart-item {
  display: flex; gap: 20px; padding: 20px 0;
  border-bottom: 1px solid var(--border-light);
}
.cart-item .item-image {
  width: 100px; height: 130px; flex-shrink: 0;
  background: var(--bg-secondary);
}
.cart-item .item-info { flex: 1; }
.cart-item .item-name { font-weight: 500; margin-bottom: 4px; }
.cart-item .item-meta { font-size: 0.8rem; color: var(--text-light); margin-bottom: 8px; }
.cart-item .item-price { font-size: 0.9rem; }
.cart-item .item-quantity { display: flex; align-items: center; gap: 8px; margin-top: 8px; }
.cart-item .remove-btn {
  font-size: 0.78rem; color: var(--text-light); text-decoration: underline;
  margin-top: 8px; display: inline-block; cursor: pointer; transition: var(--transition);
}
.cart-item .remove-btn:hover { color: var(--error); }
.cart-item .item-total { text-align: right; font-weight: 500; min-width: 80px; }

.empty-cart {
  text-align: center; padding: 80px 0;
  color: var(--text-light);
}
.empty-cart h2 { color: var(--text-secondary); margin-bottom: 12px; font-size: 1.5rem; }

/* ============ Checkout ============ */
.checkout-layout { display: flex; gap: 48px; padding: 40px 0; align-items: flex-start; }
.checkout-form { flex: 1; }
.checkout-sidebar { width: 380px; flex-shrink: 0; }

.form-section { margin-bottom: 36px; }
.form-section h3 {
  font-family: var(--font-body); font-size: 0.95rem;
  font-weight: 600; margin-bottom: 16px;
  padding-bottom: 8px; border-bottom: 1px solid var(--border-light);
}
.form-row { display: flex; gap: 16px; }
.form-field { margin-bottom: 16px; flex: 1; }
.form-field label {
  display: block; font-size: 0.8rem; color: var(--text-secondary);
  margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.5px;
}
.form-field input, .form-field select {
  width: 100%; padding: 10px 14px;
  border: 1px solid var(--border); border-radius: var(--radius);
  font-size: 0.9rem; transition: var(--transition);
  background: var(--bg);
}
.form-field input:focus, .form-field select:focus {
  outline: none; border-color: var(--text);
  box-shadow: 0 0 0 3px rgba(0,0,0,0.03);
}
.form-field .error-msg {
  font-size: 0.75rem; color: var(--error); margin-top: 4px;
  display: none;
}
.form-field.error input { border-color: var(--error); }
.form-field.error .error-msg { display: block; }

.payment-methods { display: flex; gap: 8px; margin-bottom: 16px; }
.payment-method {
  padding: 10px 20px; border: 1px solid var(--border);
  border-radius: var(--radius); font-size: 0.8rem; cursor: pointer;
  transition: var(--transition);
}
.payment-method.selected { border-color: var(--accent); background: var(--bg); font-weight: 500; }

.order-summary {
  background: var(--bg-secondary); padding: 24px;
  border-radius: var(--radius-lg); position: sticky;
  top: calc(var(--header-height) + 20px);
}
.order-summary h3 {
  font-family: var(--font-body); font-size: 0.95rem; margin-bottom: 16px;
}
.order-item {
  display: flex; gap: 12px; margin-bottom: 14px;
  font-size: 0.85rem;
}
.order-item .oi-image {
  width: 56px; height: 72px; flex-shrink: 0;
  background: var(--bg-tertiary); border-radius: 3px;
  position: relative;
}
.order-item .oi-image .oi-count {
  position: absolute; top: -6px; right: -6px;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--accent); color: #fff;
  font-size: 0.6rem; display: flex; align-items: center;
  justify-content: center;
}
.order-item .oi-info { flex: 1; }
.order-item .oi-price { text-align: right; font-weight: 500; white-space: nowrap; }

/* ============ Success Page ============ */
.success-page { text-align: center; padding: 100px 0; }
.success-icon {
  width: 72px; height: 72px; border-radius: 50%;
  background: var(--success); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem; margin: 0 auto 24px;
  animation: scaleIn 0.5s ease;
}
@keyframes scaleIn {
  0% { transform: scale(0); opacity: 0; }
  60% { transform: scale(1.15); }
  100% { transform: scale(1); opacity: 1; }
}
.success-page h1 { font-size: 2.2rem; margin-bottom: 8px; }
.success-page p { color: var(--text-secondary); margin-bottom: 8px; }
.success-page .order-id {
  font-family: monospace; font-size: 1rem;
  background: var(--bg-secondary); padding: 10px 24px;
  border-radius: var(--radius); display: inline-block;
  margin: 16px 0 32px;
}

/* ============ Toast ============ */
.toast {
  position: fixed; bottom: 32px; right: 32px; z-index: 9999;
  background: var(--accent); color: #fff;
  padding: 14px 24px; border-radius: var(--radius);
  font-size: 0.85rem; box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  animation: slideUp 0.3s ease;
  max-width: 400px;
}
@keyframes slideUp {
  0% { transform: translateY(20px); opacity: 0; }
  100% { transform: translateY(0); opacity: 1; }
}

/* ============ Responsive ============ */
@media (max-width: 1024px) {
  .product-grid { grid-template-columns: repeat(3, 1fr); }
  .product-detail { flex-direction: column; gap: 32px; }
  .shop-layout { flex-direction: column; }
  .shop-sidebar { width: 100%; }
  .cart-layout { flex-direction: column; }
  .cart-summary { width: 100%; position: static; }
  .checkout-layout { flex-direction: column; }
  .checkout-sidebar { width: 100%; }
}

@media (max-width: 768px) {
  .product-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .hero-content h1 { font-size: 2.4rem; }
  h1 { font-size: 2rem; }
  .container, .header-inner, .footer-inner, .footer-bottom { padding: 0 16px; }
  .nav-links { gap: 18px; }
  .cart-item { flex-wrap: wrap; }
  .cart-item .item-total { width: 100%; text-align: left; margin-top: 8px; }
  .form-row { flex-direction: column; gap: 0; }
  .footer-inner { grid-template-columns: 1fr; gap: 24px; }
  .section { padding: 48px 0; }
  .product-detail { padding: 24px 0; }
  .section-header { margin-bottom: 32px; }
}