/* ==========================================================================
   POS — three-column touch layout
   ========================================================================== */
.pos { --cart-w: 380px; display: flex; flex-direction: column; height: calc(100vh - var(--header-h)); min-height: 560px; background: var(--bg); }
.pos-top { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--border); background: var(--surface); flex-wrap: wrap; }
.pos-outlet { display: flex; align-items: center; gap: 12px; min-width: 0; }
.pos-register { display: inline-flex; align-items: center; gap: 5px; white-space: nowrap; }
.pos-search { flex: 1; min-width: 220px; }
.pos-search .input { height: 42px; font-size: 14px; border-radius: 10px; background: var(--surface-2); }
.pos-search kbd { right: 10px; }
#heldBtn .badge { height: 20px; padding: 0 7px; margin-left: 2px; }

.pos-main { flex: 1; min-height: 0; display: grid; grid-template-columns: 190px minmax(0, 1fr) var(--cart-w); }
.pos-cats { border-right: 1px solid var(--border); background: var(--surface); overflow-y: auto; padding: 10px; display: flex; flex-direction: column; gap: 4px; }
.pos-cat { display: flex; align-items: center; gap: 10px; padding: 9px 10px; border-radius: 10px; text-align: left; color: var(--text-2); font-weight: 600; font-size: 13px; min-height: 46px; transition: background var(--transition), color var(--transition); }
.pos-cat:hover { background: var(--surface-hover); color: var(--text); }
.pos-cat.active { background: var(--primary-50); color: var(--primary-700); }
:root[data-theme="dark"] .pos-cat.active { color: var(--primary-600); }
.pc-icon { width: 30px; height: 30px; border-radius: 8px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; color: var(--cc, var(--primary)); background: color-mix(in srgb, var(--cc, var(--primary)) 13%, transparent); }
.pc-icon svg { width: 16px; height: 16px; }
.pc-name { flex: 1; min-width: 0; line-height: 1.2; }
.pc-count { font-size: 11px; color: var(--text-3); background: var(--surface-3); border-radius: 10px; padding: 1px 7px; }

.pos-catalog { overflow-y: auto; padding: 14px; min-width: 0; }
.pos-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
.pos-item { display: flex; flex-direction: column; text-align: left; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition); box-shadow: var(--shadow-xs); }
.pos-item:hover { border-color: var(--primary); box-shadow: var(--shadow); transform: translateY(-1px); }
.pos-item:active { transform: scale(.98); }
.pos-item.disabled { opacity: .5; cursor: not-allowed; filter: grayscale(.4); }
.pos-item.disabled:hover { transform: none; border-color: var(--border); box-shadow: var(--shadow-xs); }
.pi-img { position: relative; display: block; aspect-ratio: 4 / 3; background: var(--surface-3); }
.pi-img img { width: 100%; height: 100%; object-fit: cover; }
.pi-var { position: absolute; left: 8px; top: 8px; font-size: 10.5px; font-weight: 700; background: rgba(15, 30, 54, .78); color: #fff; padding: 2px 7px; border-radius: 10px; }
.pi-body { padding: 9px 10px 10px; display: flex; flex-direction: column; gap: 4px; }
.pi-name { font-weight: 650; font-size: 13px; line-height: 1.25; min-height: 32px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.pi-row { display: flex; align-items: center; justify-content: space-between; gap: 6px; }
.pi-price { font-family: var(--font-display); font-weight: 800; font-size: 14.5px; white-space: nowrap; }
.pi-price small { font-family: var(--font-sans); font-size: 10.5px; font-weight: 500; color: var(--text-3); }
.pi-stock { font-size: 10.5px; font-weight: 600; color: var(--success); white-space: nowrap; }
.pi-stock.low { color: var(--warning); }
.pi-stock.out { color: var(--danger); }
.pos-empty { grid-column: 1 / -1; }

/* Cart */
.pos-cart { border-left: 1px solid var(--border); background: var(--surface); display: flex; flex-direction: column; min-height: 0; transition: box-shadow 200ms; }
.pos-cart.bump { box-shadow: inset 3px 0 0 var(--primary); }
.cart-head { display: flex; align-items: center; gap: 8px; padding: 12px 14px; border-bottom: 1px solid var(--divider); }
.cart-customer { flex: 1; display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: 10px; border: 1px dashed var(--border-strong); text-align: left; min-width: 0; }
.cart-customer:hover { border-color: var(--primary); background: var(--primary-50); }
.cart-customer > svg { width: 16px; height: 16px; color: var(--text-3); flex-shrink: 0; }
.cart-customer .li-icon { width: 30px; height: 30px; }
.cc-text { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.cc-text b { font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cc-text span { font-size: 11.5px; color: var(--text-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pos-cart-close { display: none; }
.cart-title { padding: 10px 14px 4px; font-size: 13px; }
.cart-lines { flex: 1; overflow-y: auto; padding: 4px 8px; min-height: 80px; }
.cart-empty .empty-state { padding: 28px 10px; }
.cart-line { display: flex; gap: 10px; padding: 10px 6px; border-bottom: 1px solid var(--divider); position: relative; }
.cart-line:last-child { border-bottom: 0; }
.cl-main { flex: 1; min-width: 0; }
.cl-name { font-weight: 650; font-size: 13px; cursor: pointer; padding-right: 22px; }
.cl-name:hover { color: var(--primary-700); }
.cl-sub { font-size: 11.5px; color: var(--text-3); margin-top: 1px; }
.cl-ctrl { display: flex; align-items: center; justify-content: space-between; margin-top: 7px; gap: 8px; }
.cl-total { font-weight: 700; font-size: 13.5px; }
.cl-remove { position: absolute; top: 8px; right: 2px; color: var(--text-3); }
.cart-summary { padding: 10px 16px; border-top: 1px solid var(--divider); background: var(--surface-2); display: flex; flex-direction: column; gap: 3px; }
.cs-row { display: flex; justify-content: space-between; gap: 10px; font-size: 12.5px; }
.cs-total { display: flex; justify-content: space-between; align-items: baseline; margin-top: 6px; padding-top: 8px; border-top: 1px dashed var(--border-strong); font-family: var(--font-display); font-weight: 800; font-size: 20px; }
.cs-total small { font-family: var(--font-sans); font-size: 11px; font-weight: 500; }
.cart-actions { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; padding: 10px 14px 0; }
.cart-actions .btn { padding: 0 6px; }
.cart-actions kbd, .pos-pay kbd { height: 18px; font-size: 10px; margin-left: 2px; }
.pos-pay { margin: 10px 14px 14px; width: auto; }
.pos-pay kbd { background: rgba(255,255,255,.18); color: #fff; border-color: rgba(255,255,255,.3); box-shadow: none; }
.pos-cart-fab { display: none; }

/* Modals used by POS */
.variant-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 10px; }
.variant-btn { display: flex; flex-direction: column; gap: 2px; padding: 14px 10px; border: 1.5px solid var(--border-strong); border-radius: 12px; background: var(--surface); text-align: center; transition: all var(--transition); }
.variant-btn:hover:not(:disabled) { border-color: var(--primary); background: var(--primary-50); }
.variant-btn b { font-size: 14px; } .variant-btn span { font-family: var(--font-display); font-weight: 800; color: var(--primary-700); }
.variant-btn em { font-size: 10.5px; color: var(--danger); font-style: normal; }
.variant-btn:disabled { opacity: .5; }
.coupon-card { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border: 1px dashed var(--border-strong); border-radius: 10px; text-align: left; background: var(--surface-2); }
.coupon-card:hover { border-color: var(--primary); background: var(--primary-50); }
.cust-pick { max-height: 300px; overflow-y: auto; border: 1px solid var(--border); border-radius: 10px; }
.cust-row { width: 100%; text-align: left; }
.cust-row.selected { background: var(--primary-50); }
.new-cust summary { list-style: none; cursor: pointer; display: inline-flex; }
.new-cust summary::-webkit-details-marker { display: none; }

.pay-layout { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 20px; }
.pay-summary { background: var(--surface-2); border: 1px solid var(--border); border-radius: 12px; padding: 14px; display: flex; flex-direction: column; gap: 5px; align-self: start; }
.pay-due { display: flex; flex-direction: column; padding-bottom: 10px; margin-bottom: 4px; border-bottom: 1px dashed var(--border-strong); }
.pay-due span { font-size: 12px; color: var(--text-3); font-weight: 600; }
.pay-due b { font-family: var(--font-display); font-size: 30px; font-weight: 800; letter-spacing: -0.02em; }
.pay-lines { margin-top: 8px; padding-top: 8px; border-top: 1px solid var(--divider); display: flex; flex-direction: column; gap: 4px; max-height: 180px; overflow-y: auto; color: var(--text-2); }
.pay-tabs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-bottom: 16px; }
.pay-tab { display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 12px 6px; border: 1.5px solid var(--border); border-radius: 12px; font-weight: 650; font-size: 13px; color: var(--text-2); background: var(--surface); }
.pay-tab svg { width: 20px; height: 20px; }
.pay-tab:hover:not(:disabled) { border-color: var(--border-strong); }
.pay-tab.active { border-color: var(--primary); background: var(--primary-50); color: var(--primary-700); }
:root[data-theme="dark"] .pay-tab.active { color: var(--primary-600); }
.input-lg { height: 50px; font-size: 22px; font-weight: 700; font-family: var(--font-display); }
.input-addon:has(.input-lg) > span { font-size: 18px; }
.quick-amts { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.quick-amts .chip { height: 38px; padding: 0 16px; font-size: 13.5px; }
.change-box { display: flex; justify-content: space-between; align-items: center; padding: 12px 14px; border-radius: 10px; background: var(--surface-2); border: 1px solid var(--border); margin-top: 14px; font-weight: 600; }
.change-box b { font-family: var(--font-display); font-size: 20px; }
.upi-box { display: flex; align-items: center; gap: 20px; padding: 14px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface-2); }
.upi-box svg { border: 1px solid var(--border); }
.card-terminal { margin: 0 auto; width: 220px; padding: 14px; border-radius: 18px; background: #1d2433; box-shadow: var(--shadow); }
.ct-screen { background: #c9d8c3; color: #142014; border-radius: 8px; padding: 10px; font-family: var(--font-mono); display: flex; flex-direction: column; gap: 4px; min-height: 92px; }
.ct-screen b { font-size: 20px; }
.ct-screen span { font-size: 11px; display: flex; align-items: center; gap: 6px; }
.card-terminal.approved .ct-screen { background: #b9e5c5; }
.ct-keys { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; margin-top: 10px; }
.ct-keys span { background: #2c3446; color: #cfd6e4; border-radius: 6px; text-align: center; padding: 5px 0; font-size: 12px; font-family: var(--font-mono); }
.spin { width: 12px; height: 12px; border-radius: 50%; border: 2px solid currentColor; border-right-color: transparent; display: inline-block; animation: spin .7s linear infinite; }
.split-row .select { flex-shrink: 0; }
.pay-success { text-align: center; padding: 10px 0; }
.ps-check { width: 68px; height: 68px; border-radius: 50%; margin: 0 auto 12px; background: var(--success-50); color: var(--success); display: flex; align-items: center; justify-content: center; animation: pop-in 260ms ease-out; }
.ps-check svg { width: 34px; height: 34px; stroke-width: 3; }
.pay-success h3 { font-size: 20px; }
.ps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; margin-top: 16px; text-align: left; }

/* Tablet / mobile POS */
@media (max-width: 1280px) { .pos { --cart-w: 340px; } .pos-main { grid-template-columns: 160px minmax(0, 1fr) var(--cart-w); } }
@media (max-width: 1024px) {
  .pos { height: auto; min-height: calc(100vh - var(--header-h)); }
  .pos-main { grid-template-columns: minmax(0, 1fr); grid-template-rows: auto 1fr; }
  .pos-cats { flex-direction: row; overflow-x: auto; border-right: 0; border-bottom: 1px solid var(--border); padding: 8px 12px; }
  .pos-cat { flex-shrink: 0; min-height: 40px; padding: 6px 10px; }
  .pos-cat .pc-icon { width: 26px; height: 26px; }
  .pos-catalog { padding-bottom: 90px; }
  .pos-cart { position: fixed; top: 0; right: 0; bottom: 0; width: min(420px, 100vw); z-index: 900; transform: translateX(100%); transition: transform 240ms ease; box-shadow: var(--shadow-lg); }
  .pos-cart.open { transform: none; }
  .pos-cart-close { display: inline-flex; }
  .pos-cart-fab { display: flex; position: fixed; left: 16px; right: 16px; bottom: 16px; z-index: 800; align-items: center; gap: 10px; height: 56px; padding: 0 18px; border-radius: 14px; background: var(--navy); color: #fff; font-weight: 600; box-shadow: var(--shadow-lg); }
  :root[data-theme="dark"] .pos-cart-fab { background: var(--primary); }
  .pos-cart-fab.has-items { background: var(--primary); }
  .pos-cart-fab svg { width: 20px; height: 20px; }
  .pos-cart-fab b { margin-left: auto; font-family: var(--font-display); font-size: 17px; }
}
@media (max-width: 640px) {
  .pos-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 10px; }
  .pos-register { display: none; }
  .pay-layout { grid-template-columns: minmax(0, 1fr); }
  .pay-lines { display: none; }
  .upi-box { flex-direction: column; text-align: center; }
}

/* ==========================================================================
   GST invoices
   ========================================================================== */
.inv-detail { grid-template-columns: minmax(0, 1fr) 320px; align-items: start; }
.inv-preview { overflow-x: auto; background: #ECEAE6; padding: 16px; }
.inv-preview .inv-doc { box-shadow: 0 4px 18px rgba(0,0,0,.1); border-radius: 4px; min-width: 640px; }
.modal .inv-preview { border-radius: 10px; }
.modal .inv-preview .rcpt { box-shadow: 0 4px 18px rgba(0,0,0,.1); }
.inv-form .inv-lines td { vertical-align: top; }
.inv-form .inv-lines .select-sm, .inv-form .inv-lines .input-sm { min-width: 70px; }
.inv-side .sticky-card { position: sticky; top: calc(var(--header-h) + 16px); }
@media (max-width: 1200px) { .inv-detail { grid-template-columns: minmax(0, 1fr); } .inv-side .sticky-card { position: static; } }
@media (max-width: 760px) { .inv-preview { padding: 8px; } .inv-preview .inv-doc { min-width: 600px; } }