/* ═══════════════════════════════════════════
   POS Cash Sale — Clean Minimal Kiosk
   ═══════════════════════════════════════════
   Full-screen takeover when #posTab is active.
   Neutral palette, flat surfaces, no gradients.
   ─────────────────────────────────────────── */

:root {
  --pos-bg:        #fafafa;
  --pos-surface:   #ffffff;
  --pos-border:    #e5e7eb;
  --pos-border-2:  #d1d5db;
  --pos-text:      #111827;
  --pos-muted:     #6b7280;
  --pos-subtle:    #9ca3af;
  --pos-accent:    #111827;
  --pos-accent-fg: #ffffff;
  --pos-field-bg:  #ffffff;
  --pos-field-alt: #f9fafb;
  --pos-ok:        #16a34a;
  --pos-warn:      #d97706;
  --pos-err:       #dc2626;
  --pos-radius:    8px;
  --pos-radius-sm: 6px;
}

/* ─── Full-screen kiosk takeover ──────────────
   When the POS tab is active, cover the entire
   viewport (above the sticky header & nav bar).
*/
#posTab.tab-content.active {
  display: block;
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: var(--pos-bg);
  padding: 0;
  overflow: hidden;
}

.pos-container {
  max-width: none;
  margin: 0;
  padding: 0;
  background: var(--pos-bg);
  border-radius: 0;
  min-height: 0;
  height: 100vh;
  overflow-y: auto;
  overflow-x: hidden;
  color: var(--pos-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
}

/* ─── Top Bar ─── */
.pos-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--pos-surface);
  color: var(--pos-text);
  border-radius: 0;
  padding: 14px 28px;
  margin: 0;
  border-bottom: 1px solid var(--pos-border);
  box-shadow: none;
  position: sticky;
  top: 0;
  z-index: 10;
  overflow: visible;
}

.pos-header::before { content: none; }

.pos-header h2 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--pos-text);
  display: flex;
  align-items: center;
  gap: 10px;
}

.pos-header h2::before { content: none; }

.pos-header-right {
  display: flex;
  gap: 10px;
  align-items: center;
}

.pos-header-right select,
.pos-header-right input {
  padding: 8px 12px;
  border: 1px solid var(--pos-border-2);
  border-radius: var(--pos-radius-sm);
  font-size: 13px;
  font-weight: 500;
  background: var(--pos-surface);
  color: var(--pos-text);
  min-width: 180px;
  transition: border-color 0.15s;
  backdrop-filter: none;
}

.pos-header-right select:hover,
.pos-header-right input:hover { background: var(--pos-field-alt); }

.pos-header-right select:focus,
.pos-header-right input:focus {
  border-color: var(--pos-text);
  outline: none;
  box-shadow: 0 0 0 3px rgba(17,24,39,0.08);
}

.pos-header-right select option { color: var(--pos-text); background: #fff; }

.pos-exit-btn {
  padding: 8px 14px;
  background: var(--pos-surface);
  border: 1px solid var(--pos-border-2);
  border-radius: var(--pos-radius-sm);
  color: var(--pos-text);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.pos-exit-btn:hover { background: var(--pos-field-alt); border-color: var(--pos-text); }

/* ─── Section spacing (horizontal gutters) ─── */
.pos-container > .pos-customer-bar:first-of-type { margin-top: 16px; }

.pos-container > .pos-customer-bar,
.pos-container > .pos-item-entry,
.pos-container > .pos-lineitems-wrap,
.pos-container > .pos-payment {
  margin-left: 28px;
  margin-right: 28px;
}

.pos-container > div[style*="margin:0 0 10px"] {
  margin: 0 28px 12px !important;
}

/* ─── Customer Bar ─── */
.pos-customer-bar {
  display: flex;
  gap: 10px;
  align-items: center;
  background: var(--pos-surface);
  border-radius: var(--pos-radius);
  padding: 12px 16px;
  margin-bottom: 12px;
  box-shadow: none;
  flex-wrap: wrap;
  border: 1px solid var(--pos-border);
  transition: border-color 0.15s;
}

.pos-customer-bar:hover { box-shadow: none; border-color: var(--pos-border-2); }

.pos-customer-bar label {
  font-size: 11px;
  font-weight: 600;
  color: var(--pos-muted);
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.pos-customer-bar input,
.pos-customer-bar select {
  padding: 9px 12px;
  border: 1px solid var(--pos-border-2);
  border-radius: var(--pos-radius-sm);
  font-size: 13px;
  font-weight: 500;
  background: var(--pos-surface);
  color: var(--pos-text);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.pos-customer-bar input:focus {
  border-color: var(--pos-text);
  outline: none;
  background: var(--pos-surface);
  box-shadow: 0 0 0 3px rgba(17,24,39,0.08);
}

.pos-walkin-btn {
  padding: 9px 18px;
  background: var(--pos-accent);
  border: 1px solid var(--pos-accent);
  border-radius: var(--pos-radius-sm);
  color: var(--pos-accent-fg);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: opacity 0.15s;
  box-shadow: none;
}

.pos-walkin-btn:hover { opacity: 0.88; transform: none; box-shadow: none; }
.pos-walkin-btn:active { transform: none; }

/* ─── Item Entry ─── */
.pos-item-entry {
  display: flex;
  align-items: stretch;
  background: var(--pos-surface);
  border: 1px solid var(--pos-border);
  border-radius: var(--pos-radius);
  margin-bottom: 12px;
  flex-wrap: wrap;
  overflow: visible;
  box-shadow: none;
  transition: border-color 0.15s;
  position: relative;
}

.pos-item-entry > .pos-field:first-child {
  border-top-left-radius: var(--pos-radius);
  border-bottom-left-radius: var(--pos-radius);
}
.pos-item-entry > button.pos-add-btn {
  border-top-right-radius: var(--pos-radius);
  border-bottom-right-radius: var(--pos-radius);
}

.pos-item-entry:hover { box-shadow: none; border-color: var(--pos-border-2); }

.pos-item-entry .pos-field {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-right: 1px solid var(--pos-border);
  padding: 0;
  background: var(--pos-surface);
  transition: background 0.15s;
}

.pos-item-entry .pos-field:last-of-type,
.pos-item-entry > button:last-child { border-right: none; }

.pos-item-entry .pos-field:focus-within { background: var(--pos-field-alt); }

.pos-item-entry .pos-field label {
  font-size: 10px;
  font-weight: 600;
  color: var(--pos-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 6px 10px 3px;
  background: var(--pos-field-alt);
  border-bottom: 1px solid var(--pos-border);
  white-space: nowrap;
  margin: 0;
}

.pos-item-entry input,
.pos-item-entry select {
  padding: 10px 10px;
  border: none;
  border-radius: 0;
  font-size: 13px;
  font-weight: 500;
  background: transparent;
  color: var(--pos-text);
  transition: background 0.15s;
  width: 100%;
  box-sizing: border-box;
  min-height: 38px;
}

.pos-item-entry input:focus,
.pos-item-entry select:focus {
  outline: none;
  background: var(--pos-field-alt);
  box-shadow: inset 0 0 0 2px var(--pos-text);
}

.pos-item-entry input:read-only,
.pos-item-entry input[readonly] {
  background: var(--pos-field-alt) !important;
  color: var(--pos-muted);
  cursor: default;
}

.pos-item-entry #posStock {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px 6px;
  min-height: 38px;
  text-align: center;
  font-size: 12px;
  line-height: 1.2;
}

.pos-item-entry > button.pos-add-btn {
  align-self: center;
  border-radius: 4px;
  padding: 0;
  margin: 0 10px 0 6px;
  min-width: 24px;
  width: 24px;
  height: 24px;
  font-size: 13px;
  font-weight: 600;
  line-height: 1;
  box-shadow: none;
  background: var(--pos-accent);
  color: var(--pos-accent-fg);
}

.pos-item-entry > button.pos-add-btn:hover {
  transform: none;
  box-shadow: none;
  opacity: 0.85;
}

/* Live GST split preview */
.pos-split-preview {
  flex: 0 0 100%;
  width: 100%;
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 500;
  color: var(--pos-muted);
  background: var(--pos-field-alt);
  border-top: 1px solid var(--pos-border);
  text-align: right;
  min-height: 26px;
  transition: background 0.2s, color 0.2s;
}
.pos-split-preview:empty { display: none; }
.pos-split-preview.is-include { color: var(--pos-ok); background: #f6fdf8; }
.pos-split-preview.is-none    { color: var(--pos-subtle); background: #f9fafb; }

.pos-stock-badge {
  display: inline-block;
  padding: 0;
  background: transparent !important;
  box-shadow: none !important;
  font-size: 13px;
  font-weight: 600;
  color: var(--pos-text);
}

.pos-stock-ok   { color: var(--pos-ok); }
.pos-stock-low  { color: var(--pos-warn); }
.pos-stock-zero { color: var(--pos-err); }

.pos-add-btn {
  padding: 10px 22px;
  background: var(--pos-accent);
  color: var(--pos-accent-fg);
  border: 1px solid var(--pos-accent);
  border-radius: var(--pos-radius-sm);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.15s;
  box-shadow: none;
}

.pos-add-btn:hover { transform: none; box-shadow: none; opacity: 0.88; }
.pos-add-btn:active { transform: none; }

/* Discount toggle */
.pos-disc-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px;
  background: var(--pos-surface);
  border: 1px solid var(--pos-border);
  border-radius: var(--pos-radius-sm);
  font-size: 12px;
  font-weight: 500;
}
.pos-disc-toggle label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  color: var(--pos-muted);
}
.pos-disc-toggle input[type="radio"] { accent-color: var(--pos-text); cursor: pointer; }
.pos-disc-label {
  font-weight: 600;
  color: var(--pos-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 11px;
}

/* Advanced Search button */
.pos-adv-btn {
  padding: 8px 16px;
  background: var(--pos-surface);
  color: var(--pos-text);
  border: 1px solid var(--pos-border-2);
  border-radius: var(--pos-radius-sm);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  box-shadow: none;
}
.pos-adv-btn:hover {
  background: var(--pos-field-alt);
  border-color: var(--pos-text);
  box-shadow: none;
  transform: none;
}

/* ─── Line Items ─── */
.pos-lineitems-wrap {
  background: var(--pos-surface);
  border-radius: var(--pos-radius);
  box-shadow: none;
  border: 1px solid var(--pos-border);
  overflow: hidden;
  margin-bottom: 12px;
}

.pos-lineitems-title {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  background: var(--pos-field-alt);
  border-bottom: 1px solid var(--pos-border);
  font-size: 13px;
  font-weight: 600;
  color: var(--pos-text);
  letter-spacing: 0.01em;
}

.pos-lineitems-badge {
  background: var(--pos-accent);
  color: var(--pos-accent-fg);
  font-size: 11px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
  letter-spacing: 0.02em;
  box-shadow: none;
}

/* ─── Items Table ─── */
.pos-items-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--pos-surface);
  margin-bottom: 0;
}

.pos-items-table thead th {
  background: var(--pos-surface);
  color: var(--pos-muted);
  padding: 10px 14px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-align: left;
  border-right: none;
  border-bottom: 1px solid var(--pos-border);
}

.pos-items-table thead th:last-child { text-align: center; width: 50px; }

.pos-items-table tbody td {
  padding: 11px 14px;
  font-size: 13px;
  border-bottom: 1px solid var(--pos-border);
  border-right: none;
  vertical-align: middle;
  color: var(--pos-text);
  background: var(--pos-surface);
}

.pos-items-table tbody tr { transition: background 0.15s; }
.pos-items-table tbody tr:nth-child(even) td { background: var(--pos-surface); }
.pos-items-table tbody tr:hover td { background: var(--pos-field-alt) !important; }

.pos-items-table .pos-col-right {
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}
.pos-items-table .pos-col-center { text-align: center; }

.pos-remove-btn {
  width: 28px;
  height: 28px;
  border: 1px solid var(--pos-border-2);
  background: var(--pos-surface);
  color: var(--pos-muted);
  border-radius: var(--pos-radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pos-remove-btn:hover {
  background: var(--pos-surface);
  color: var(--pos-err);
  border-color: var(--pos-err);
  transform: none;
}

/* ─── Payment Section ─── */
.pos-payment {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
}

.pos-totals {
  background: var(--pos-surface);
  border-radius: var(--pos-radius);
  padding: 18px 20px;
  box-shadow: none;
  border: 1px solid var(--pos-border);
}

.pos-total-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  font-size: 13px;
  color: var(--pos-muted);
  font-weight: 500;
}

.pos-total-row.pos-grand {
  font-size: 22px;
  font-weight: 700;
  background: none;
  -webkit-background-clip: initial;
  -webkit-text-fill-color: initial;
  background-clip: initial;
  color: var(--pos-text);
  border-top: 1px solid var(--pos-border);
  margin-top: 8px;
  padding-top: 12px;
  letter-spacing: -0.01em;
}

.pos-pay-form {
  background: var(--pos-surface);
  border-radius: var(--pos-radius);
  padding: 18px 20px;
  box-shadow: none;
  border: 1px solid var(--pos-border);
}

.pos-pay-form .pos-field { margin-bottom: 12px; }

.pos-pay-form label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  color: var(--pos-muted);
  margin-bottom: 5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.pos-pay-form input,
.pos-pay-form select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--pos-border-2);
  border-radius: var(--pos-radius-sm);
  font-size: 14px;
  font-weight: 500;
  box-sizing: border-box;
  background: var(--pos-surface);
  color: var(--pos-text);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.pos-pay-form input:focus,
.pos-pay-form select:focus {
  border-color: var(--pos-text);
  outline: none;
  background: var(--pos-surface);
  box-shadow: 0 0 0 3px rgba(17,24,39,0.08);
}

.pos-change {
  background: var(--pos-field-alt);
  border: 1px solid var(--pos-border);
  border-radius: var(--pos-radius-sm);
  padding: 12px 14px;
  text-align: center;
  font-size: 16px;
  font-weight: 700;
  color: var(--pos-ok);
  box-shadow: none;
  letter-spacing: -0.01em;
}

.pos-change.pos-change-neg {
  background: var(--pos-field-alt);
  border-color: var(--pos-border);
  color: var(--pos-err);
  box-shadow: none;
}

/* ─── Action Buttons (sticky bottom) ─── */
.pos-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  padding: 14px 28px;
  background: var(--pos-surface);
  border-top: 1px solid var(--pos-border);
  margin: 0;
  position: sticky;
  bottom: 0;
  z-index: 10;
}

.pos-clear-btn {
  padding: 11px 28px;
  background: var(--pos-surface);
  border: 1px solid var(--pos-border-2);
  border-radius: var(--pos-radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--pos-muted);
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.pos-clear-btn:hover {
  background: var(--pos-field-alt);
  border-color: var(--pos-text);
  color: var(--pos-text);
}

.pos-complete-btn {
  padding: 11px 40px;
  background: var(--pos-ok);
  border: 1px solid var(--pos-ok);
  border-radius: var(--pos-radius-sm);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: #fff;
  cursor: pointer;
  transition: opacity 0.15s;
  box-shadow: none;
  position: relative;
  overflow: hidden;
}

.pos-complete-btn::before { content: none; }

.pos-complete-btn:hover {
  transform: none;
  box-shadow: none;
  opacity: 0.9;
}
.pos-complete-btn:hover::before { left: -100%; }
.pos-complete-btn:active { transform: none; }

.pos-complete-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* ─── Empty state ─── */
.pos-empty {
  text-align: center;
  padding: 48px;
  color: var(--pos-subtle);
  font-size: 14px;
  font-style: normal;
}

/* ─── Dropdown ─── */
.pos-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--pos-surface);
  border: 1px solid var(--pos-border-2);
  border-radius: var(--pos-radius-sm);
  max-height: 240px;
  overflow-y: auto;
  z-index: 9999;
  min-width: 320px;
  width: max-content;
  max-width: 520px;
  box-shadow: 0 6px 18px rgba(17,24,39,0.08);
  margin-top: 4px;
}

.pos-dropdown div {
  padding: 10px 14px;
  cursor: pointer;
  font-size: 12px;
  border-bottom: 1px solid var(--pos-border);
  transition: background 0.15s;
  color: var(--pos-text);
}

.pos-dropdown div:last-child { border-bottom: none; }
.pos-dropdown div:hover { background: var(--pos-field-alt); color: var(--pos-text); }

/* ─── Success overlay ─── */
.pos-success-overlay {
  position: fixed;
  inset: 0;
  background: rgba(17, 24, 39, 0.4);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  animation: posFade 0.2s;
}

@keyframes posFade {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.pos-success-box {
  background: var(--pos-surface);
  border: 1px solid var(--pos-border);
  border-radius: 12px;
  padding: 36px;
  text-align: center;
  max-width: 420px;
  box-shadow: 0 12px 40px rgba(17,24,39,0.15);
  animation: posPop 0.25s ease-out;
}

@keyframes posPop {
  from { transform: scale(0.92); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}

.pos-success-icon {
  font-size: 48px;
  margin-bottom: 14px;
  display: inline-block;
  animation: none;
  color: var(--pos-ok);
}

.pos-success-title {
  font-size: 20px;
  font-weight: 700;
  background: none;
  -webkit-background-clip: initial;
  -webkit-text-fill-color: initial;
  background-clip: initial;
  color: var(--pos-text);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.pos-success-detail {
  font-size: 13px;
  color: var(--pos-muted);
  margin-bottom: 20px;
  line-height: 1.5;
}

.pos-success-btn {
  padding: 10px 22px;
  border: 1px solid var(--pos-border-2);
  border-radius: var(--pos-radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  margin: 0 4px;
  transition: opacity 0.15s, background 0.15s;
  background: var(--pos-surface);
  color: var(--pos-text);
}

.pos-print-btn {
  background: var(--pos-accent);
  border-color: var(--pos-accent);
  color: var(--pos-accent-fg);
  box-shadow: none;
}

.pos-print-btn:hover { transform: none; box-shadow: none; opacity: 0.88; }

.pos-new-btn { background: var(--pos-surface); color: var(--pos-text); }
.pos-new-btn:hover { background: var(--pos-field-alt); }

/* ─── Responsive ─── */
@media (max-width: 900px) {
  .pos-payment { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .pos-container > .pos-customer-bar,
  .pos-container > .pos-item-entry,
  .pos-container > .pos-lineitems-wrap,
  .pos-container > .pos-payment,
  .pos-container > div[style*="margin:0 0 10px"] {
    margin-left: 14px;
    margin-right: 14px;
  }
  .pos-header { padding: 12px 14px; }
  .pos-actions { padding: 12px 14px; }
  .pos-item-entry { flex-direction: column; align-items: stretch; }
  .pos-item-entry .pos-field { width: 100%; border-right: none; border-bottom: 1px solid var(--pos-border); }
  .pos-header { flex-direction: column; gap: 10px; text-align: center; align-items: stretch; }
  .pos-header h2 { justify-content: center; }
  .pos-customer-bar { flex-direction: column; align-items: stretch; }
  .pos-customer-bar input, .pos-customer-bar select { width: 100%; }
  .pos-actions { flex-direction: column-reverse; }
  .pos-actions button { width: 100%; }
}