:root{color-scheme:light;--bg:#f5f7f8;--surface:#ffffff;--surface-2:#eef3f1;--ink:#17211f;--muted:#63716d;--line:#d9e1de;--accent:#0f766e;--accent-strong:#115e59;--warning:#b45309;--danger:#b42318;--shadow:0 16px 42px rgba(20,34,31,0.08)}*{box-sizing:border-box}body,html{min-height:100%;margin:0}body{background:var(--bg);color:var(--ink);font-family:Arial,Helvetica,sans-serif}button,input{font:inherit}button{cursor:pointer}.pos-shell{min-height:100vh;padding:16px;display:grid;grid-template-rows:auto 1fr;grid-gap:14px;gap:14px}.topbar{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 16px;background:var(--surface);border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow)}.pane-header h2,.topbar h1{margin:0;font-size:24px;line-height:1.15;letter-spacing:0}.pane-header h2{font-size:20px}.eyebrow{margin:0 0 4px;color:var(--muted);font-size:12px;font-weight:700;letter-spacing:0;text-transform:uppercase}.session-strip{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:8px}.session-strip span{padding:7px 9px;border:1px solid var(--line);border-radius:8px;background:var(--surface-2);color:var(--muted);font-size:13px;white-space:nowrap}.workspace{min-height:0;display:grid;grid-template-columns:minmax(300px,1.25fr) minmax(340px,1.2fr) minmax(280px,.85fr);grid-gap:14px;gap:14px}.cart-pane,.catalog-pane,.checkout-pane{min-width:0;min-height:0;display:flex;flex-direction:column;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow);padding:14px}.pane-header{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:42px}.toolbar{display:flex;gap:8px}.icon-button{width:42px;height:42px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:8px;color:var(--ink);background:#fff}.icon-button:hover,.product-tile:hover,.quick-actions button:hover{border-color:var(--accent)}.search-box{height:46px;display:flex;align-items:center;gap:10px;padding:0 12px;border:1px solid var(--line);border-radius:8px;background:#fff}.search-box input{width:100%;min-width:0;border:0;outline:0;color:var(--ink);background:transparent}.product-grid{min-height:0;overflow:auto;display:grid;grid-template-columns:repeat(auto-fill,minmax(158px,1fr));grid-auto-rows:minmax(158px,auto);grid-gap:10px;gap:10px}.product-tile{display:grid;grid-template-rows:auto 1fr auto auto;align-items:start;grid-gap:8px;gap:8px;padding:12px;text-align:left;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink)}.product-mark{width:42px;height:42px;display:inline-flex;align-items:center;justify-content:center;border-radius:8px;background:#e2f3ef;color:var(--accent-strong)}.product-name{font-size:15px;font-weight:700;line-height:1.25}.cart-line span,.product-footer span,.product-meta{color:var(--muted);font-size:12px}.product-footer{display:flex;align-items:flex-end;justify-content:space-between;gap:8px}.cart-lines{min-height:0;overflow:auto;display:flex;flex-direction:column;gap:10px}.cart-line{min-height:72px;display:grid;grid-template-columns:minmax(0,1fr) 112px auto;align-items:center;grid-gap:12px;gap:12px;padding:10px;border:1px solid var(--line);border-radius:8px}.cart-line>div:first-child{min-width:0;display:grid;grid-gap:4px;gap:4px}.cart-line strong{overflow-wrap:anywhere}.quantity-stepper{width:112px;height:38px;display:grid;grid-template-columns:36px 1fr 36px;align-items:center;border:1px solid var(--line);border-radius:8px;overflow:hidden}.quantity-stepper button{height:100%;border:0;background:var(--surface-2);color:var(--ink)}.quantity-stepper span{text-align:center;color:var(--ink);font-weight:700}.empty-state{min-height:240px;display:grid;place-items:center;align-content:center;grid-gap:8px;gap:8px;color:var(--muted);border:1px dashed var(--line);border-radius:8px}.summary-list{display:grid;grid-gap:10px;gap:10px;padding:12px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.summary-list div{display:flex;align-items:center;justify-content:space-between;gap:10px;color:var(--muted)}.summary-list strong{color:var(--ink)}.summary-total{padding-top:10px;border-top:1px solid var(--line);font-size:18px}.payment-methods{display:grid;grid-template-columns:1fr 1fr;grid-gap:8px;gap:8px}.checkout-button,.payment-methods button,.quick-actions button{min-height:46px;display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);font-weight:700}.payment-methods .selected{border-color:var(--accent);background:#e2f3ef;color:var(--accent-strong)}.checkout-button{min-height:54px;border-color:var(--accent);background:var(--accent);color:#fff}.checkout-button:disabled{cursor:not-allowed;border-color:var(--line);background:var(--surface-2);color:var(--muted)}.quick-actions{display:grid;grid-template-columns:1fr 1fr;grid-gap:8px;gap:8px}@media (max-width:1100px){.workspace{grid-template-columns:1fr 1fr}.checkout-pane{grid-column:1/-1}}@media (max-width:760px){.pos-shell{padding:10px}.topbar{align-items:flex-start;flex-direction:column}.session-strip{justify-content:flex-start}.cart-line,.workspace{grid-template-columns:1fr}.cart-line{align-items:stretch}}