* { box-sizing: border-box; }
body { margin: 0; font-family: Inter, Arial, sans-serif; color: #17202a; background: #f6f7f8; }
.topbar { min-height: 104px; padding: 20px 28px; display: flex; align-items: center; justify-content: space-between; gap: 18px; background: #ffffff; border-bottom: 1px solid #d8dee4; position: sticky; top: 0; z-index: 2; }
h1 { margin: 0; font-size: 24px; letter-spacing: 0; }
p { margin: 6px 0 0; color: #5b6773; font-size: 14px; }
.summary { display: flex; align-items: center; gap: 18px; white-space: nowrap; }
.summary span { color: #5b6773; }
.summary strong { font-size: 24px; }
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 390px; gap: 18px; padding: 18px; }
.catalog-panel, .cart-panel { background: #fff; border: 1px solid #d8dee4; border-radius: 8px; }
.catalog-panel { min-width: 0; }
.toolbar { display: grid; grid-template-columns: minmax(0, 1fr) 220px; gap: 12px; padding: 14px; border-bottom: 1px solid #e5e7eb; }
input, select, textarea { width: 100%; border: 1px solid #cfd7df; border-radius: 6px; padding: 10px 12px; font: inherit; background: #fff; }
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; padding: 14px; }
.product-card { border: 1px solid #d8dee4; border-radius: 8px; overflow: hidden; background: #fff; display: flex; flex-direction: column; min-height: 420px; }
.image-wrap { aspect-ratio: 1 / 1; background: #eef1f4; display: grid; place-items: center; overflow: hidden; }
.image-wrap img { width: 100%; height: 100%; object-fit: cover; display: block; }
.no-img { color: #7b8794; font-size: 13px; }
.card-body { padding: 12px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.sku-line { display: flex; justify-content: space-between; gap: 8px; color: #5b6773; font-size: 12px; }
.category-pill { padding: 3px 7px; border-radius: 999px; background: #e6f4f1; color: #0f766e; white-space: nowrap; }
.product-title { font-size: 14px; line-height: 1.35; min-height: 38px; margin: 0; }
.tiers { display: grid; gap: 5px; font-size: 12px; color: #3d4a57; }
.tier-row { display: flex; justify-content: space-between; border-bottom: 1px dashed #e0e5ea; padding-bottom: 4px; }
.product-size-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 7px; }
.product-size-cell { display: grid; gap: 4px; font-size: 11px; font-weight: 700; color: #475569; }
.product-size-cell input { height: 34px; padding: 6px; text-align: center; }
.buy-row { display: grid; grid-template-columns: 1fr; gap: 8px; margin-top: auto; }
.qty-input { min-width: 0; }
.add-btn, .primary-btn { border: 0; border-radius: 6px; background: #0f766e; color: #fff; padding: 10px 12px; font-weight: 700; cursor: pointer; }
.add-btn:hover, .primary-btn:hover { background: #115e59; }
.cart-panel { padding: 16px; position: sticky; top: 122px; align-self: start; max-height: calc(100vh - 140px); display: flex; flex-direction: column; }
.cart-panel h2 { font-size: 18px; margin: 0 0 12px; }
.cart-items { display: grid; gap: 10px; overflow: auto; padding-right: 4px; min-height: 120px; }
.cart-item { border: 1px solid #e2e8f0; border-radius: 8px; padding: 10px; display: grid; gap: 6px; }
.cart-item-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 8px; }
.cart-item-title { font-size: 13px; font-weight: 700; line-height: 1.3; }
.cart-item-meta { font-size: 12px; color: #64748b; display: flex; justify-content: space-between; gap: 8px; }
.cart-edit-row { display: grid; grid-template-columns: 36px minmax(64px, 1fr) 36px auto; gap: 7px; align-items: center; }
.cart-qty-input { height: 36px; text-align: center; padding: 7px; }
.cart-size-grid { display: grid; gap: 7px; }
.cart-size-row { display: grid; grid-template-columns: 30px 36px minmax(58px, 1fr) 36px; gap: 7px; align-items: center; }
.cart-size-row > span { font-weight: 800; color: #475569; }
.qty-step-btn, .remove-btn { border: 1px solid #cfd7df; border-radius: 6px; background: #fff; color: #17202a; cursor: pointer; font-weight: 800; }
.qty-step-btn { width: 36px; height: 36px; font-size: 18px; line-height: 1; }
.remove-btn { padding: 6px 8px; color: #b42318; font-size: 12px; white-space: nowrap; }
.cart-line-total { min-width: 74px; text-align: right; font-weight: 800; color: #17202a; }
.cart-edit-total { display: flex; justify-content: space-between; align-items: center; color: #64748b; font-size: 12px; }
.customer-box, .shipping-box { border-top: 1px solid #e5e7eb; margin-top: 14px; padding-top: 14px; display: grid; gap: 8px; }
.customer-box h3, .shipping-box h3 { margin: 0; font-size: 14px; }
.customer-box textarea { height: 76px; min-height: 76px; margin-top: 0; }
.shipping-estimate { border: 1px solid #d8dee4; border-radius: 6px; background: #f8fafc; padding: 10px; min-height: 88px; display: grid; gap: 5px; font-size: 12px; color: #475569; }
.shipping-estimate strong { color: #17202a; }
.shipping-estimate .ship-total { color: #0f766e; font-size: 14px; }
.shipping-estimate .ship-warning { color: #b45309; }
.cart-footer { border-top: 1px solid #e5e7eb; margin-top: 14px; padding-top: 14px; display: grid; gap: 10px; }
.cart-footer div { display: flex; justify-content: space-between; }
.export-actions { display: grid; grid-template-columns: 1fr; gap: 8px; margin-top: 14px; }
.secondary-btn { border: 1px solid #0f766e; border-radius: 6px; background: #ffffff; color: #0f766e; padding: 10px 12px; font-weight: 700; cursor: pointer; }
.secondary-btn:hover { background: #e6f4f1; }
.export-status { min-height: 18px; margin-top: 8px; font-size: 12px; color: #0f766e; }
.mobile-summary { display: none; }
textarea { resize: vertical; font-size: 12px; }
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .cart-panel { position: static; max-height: none; }
}
@media (max-width: 560px) {
  body { padding-bottom: 250px; }
  .topbar { align-items: flex-start; flex-direction: column; padding: 16px; position: static; min-height: 0; }
  h1 { font-size: 22px; }
  .summary { width: 100%; justify-content: space-between; }
  .summary strong { font-size: 28px; }
  .layout { padding: 12px; gap: 12px; }
  .toolbar { grid-template-columns: 1fr; }
  .catalog-panel, .cart-panel { border-radius: 7px; }
  .product-grid { grid-template-columns: 1fr; }
  .cart-panel { padding: 14px; }
  .cart-items { max-height: none; overflow: visible; }
  .cart-item { padding: 12px; }
  .cart-item-title { font-size: 15px; }
  .cart-item-meta { display: none; }
  .product-size-cell input { height: 40px; font-size: 16px; }
  .cart-size-row { grid-template-columns: 34px 40px minmax(68px, 1fr) 40px; }
  .cart-edit-row { grid-template-columns: 40px minmax(72px, 1fr) 40px minmax(84px, auto); }
  .qty-step-btn { width: 40px; height: 40px; }
  .cart-qty-input { height: 40px; font-size: 16px; }
  .remove-btn { padding: 7px 9px; }
  .mobile-summary { position: fixed; left: 0; right: 0; bottom: 0; z-index: 10; display: grid; gap: 10px; padding: 10px 12px calc(10px + env(safe-area-inset-bottom)); background: rgba(255, 255, 255, 0.97); border-top: 1px solid #d8dee4; box-shadow: 0 -8px 20px rgba(15, 23, 42, 0.12); }
  .mobile-summary-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 7px; }
  .mobile-summary-grid div { min-width: 0; }
  .mobile-summary-grid span { display: block; color: #64748b; font-size: 11px; line-height: 1.2; }
  .mobile-summary-grid strong { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: #17202a; font-size: 13px; line-height: 1.4; }
  .mobile-summary-grid div:last-child strong { color: #0f766e; font-size: 16px; }
  .mobile-size-editor { display: grid; gap: 7px; }
  .mobile-size-empty { color: #64748b; font-size: 12px; }
  .mobile-active-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; align-items: center; }
  .mobile-active-row select { min-width: 0; height: 38px; padding: 7px 9px; font-size: 13px; }
  .mobile-active-row strong { font-size: 14px; color: #17202a; white-space: nowrap; }
  .mobile-size-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 7px; }
  .mobile-size-cell { display: grid; grid-template-columns: 1fr; gap: 4px; justify-items: center; border: 1px solid #d8dee4; border-radius: 6px; padding: 6px 4px; background: #f8fafc; }
  .mobile-size-cell span { font-size: 12px; font-weight: 800; color: #475569; }
  .mobile-size-cell strong { font-size: 16px; color: #17202a; }
  .mobile-size-cell button { width: 100%; height: 28px; border: 1px solid #cfd7df; border-radius: 5px; background: #fff; color: #17202a; font-weight: 900; }
  .mobile-summary-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
  .mobile-summary-actions button { min-height: 42px; }
}