:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-border: #334155;
  --text: #f8fafc;
  --muted: #94a3b8;
  --accent: #f59e0b;
  --accent-soft: rgba(245, 158, 11, 0.15);
  --ok: #22c55e;
  --danger: #ef4444;
  --radius: 16px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

.developer-credit {
  position: fixed;
  left: 0; right: 0; bottom: calc(6px + var(--safe-bottom));
  text-align: center;
  color: var(--muted);
  font-size: 0.72rem;
  opacity: 0.85;
  pointer-events: none;
  z-index: 5;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding-bottom: calc(92px + var(--safe-bottom));
}

.pos-app { max-width: 520px; margin: 0 auto; min-height: 100vh; }

.pos-header {
  padding: 14px 16px 10px;
  background: var(--bg);
  border-bottom: 1px solid var(--panel-border);
}

.pos-header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.pos-brand { display: flex; align-items: center; gap: 12px; }

.pos-logo {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), #d97706);
  display: grid; place-items: center;
  font-weight: 800; color: #111827; font-size: 0.9rem;
}

.pos-brand h1 { margin: 0; font-size: 1.15rem; }
.pos-brand p { margin: 2px 0 0; font-size: 0.78rem; color: var(--muted); }

.pos-header-actions { display: flex; gap: 8px; }

.icon-btn {
  width: 44px; height: 44px;
  border-radius: 12px;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  color: var(--text);
  font-size: 1.15rem;
  cursor: pointer;
}

.status-bar { margin-top: 8px; font-size: 0.8rem; color: var(--muted); }
.status-bar.online { color: var(--ok); }
.status-bar.offline { color: var(--danger); }

.pos-main { padding-bottom: 8px; }

.search-block {
  padding: 12px 16px;
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--panel-border);
}

.search-row {
  display: flex;
  gap: 10px;
  align-items: stretch;
}

.search-wrap { flex: 1; position: relative; }

.search-wrap input {
  width: 100%;
  height: 52px;
  padding: 0 44px 0 16px;
  border-radius: var(--radius);
  border: 2px solid var(--accent);
  background: #0b1220;
  color: var(--text);
  font-size: 16px;
}

.search-wrap input:focus { outline: none; box-shadow: 0 0 0 3px var(--accent-soft); }

.clear-btn {
  position: absolute; right: 8px; top: 50%;
  transform: translateY(-50%);
  width: 36px; height: 36px;
  border: none; border-radius: 999px;
  background: var(--panel-border);
  color: var(--text);
  font-size: 1.3rem;
  cursor: pointer;
}
.clear-btn.hidden { display: none; }

.scan-btn {
  width: 52px; height: 52px;
  flex-shrink: 0;
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  background: var(--accent-soft);
  font-size: 1.4rem;
  cursor: pointer;
}

.tier-row {
  display: flex;
  gap: 8px;
  margin-top: 10px;
  overflow-x: auto;
  scrollbar-width: none;
}
.tier-row::-webkit-scrollbar { display: none; }

.tier {
  flex: 1;
  min-width: 72px;
  padding: 10px 8px;
  border-radius: 12px;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  color: var(--muted);
  font-weight: 600;
  font-size: 0.82rem;
  cursor: pointer;
  text-align: center;
}
.tier.active {
  background: var(--accent);
  color: #111827;
  border-color: var(--accent);
}

.hero-card {
  margin: 12px 16px 0;
  padding: 16px;
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(245,158,11,0.2), rgba(30,41,59,0.95));
  border: 1px solid rgba(245,158,11,0.4);
}
.hero-card.hidden { display: none; }
.hero-card h2 { margin: 0 0 4px; font-size: 1.1rem; }
.hero-price { font-size: 1.85rem; font-weight: 800; color: var(--accent); margin: 6px 0; }
.hero-meta { font-size: 0.84rem; color: var(--muted); display: flex; flex-wrap: wrap; gap: 8px 12px; }
.hero-meta strong { color: var(--text); }
.hero-add-btn {
  margin-top: 12px;
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 12px;
  background: var(--accent);
  color: #111827;
  font-weight: 800;
  font-size: 1rem;
  cursor: pointer;
}

.results-section, .sales-section { padding: 12px 16px; }

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.section-head h2 { margin: 0; font-size: 1rem; }

.section-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 0;
  border: none;
  background: none;
  color: var(--text);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}
.section-toggle .chevron { margin-left: auto; color: var(--muted); font-size: 0.75rem; }
.collapsed-body.hidden { display: none; }

.count-badge {
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  color: var(--muted);
}

.product-cards, .sales-cards { display: flex; flex-direction: column; gap: 12px; }

.product-card {
  padding: 14px;
  border-radius: var(--radius);
  background: var(--panel);
  border: 1px solid var(--panel-border);
}
.product-card.selected { border-color: var(--accent); background: rgba(245,158,11,0.06); }

.card-top { display: flex; justify-content: space-between; gap: 10px; align-items: flex-start; }
.card-top h3 { margin: 0; font-size: 1rem; line-height: 1.35; flex: 1; }

.stock-pill {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  white-space: nowrap;
}
.stock-pill.ok { background: rgba(34,197,94,0.15); color: var(--ok); }
.stock-pill.low { background: rgba(239,68,68,0.15); color: #fca5a5; }

.card-prices {
  margin-top: 10px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.price-box {
  padding: 8px 10px;
  border-radius: 10px;
  background: rgba(15,23,42,0.5);
  font-size: 0.8rem;
}
.price-box span { display: block; color: var(--muted); font-size: 0.72rem; }
.price-box strong { font-size: 0.95rem; }
.price-box.retail strong { color: var(--accent); }

.card-sub { margin-top: 8px; font-size: 0.78rem; color: var(--muted); }

.add-btn {
  margin-top: 12px;
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 12px;
  background: var(--accent);
  color: #111827;
  font-weight: 800;
  font-size: 1rem;
  cursor: pointer;
}
.add-btn:active { transform: scale(0.98); }

.sale-card {
  padding: 14px;
  border-radius: var(--radius);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  cursor: pointer;
}
.card-price { font-weight: 800; color: var(--accent); }

.empty-msg { text-align: center; color: var(--muted); padding: 20px 8px; margin: 0; }

.offline-banner {
  margin: 10px 16px;
  padding: 12px;
  border-radius: 12px;
  background: rgba(239,68,68,0.12);
  border: 1px solid rgba(239,68,68,0.35);
  color: #fecaca;
  font-size: 0.85rem;
}
.offline-banner.hidden { display: none; }

.queue-banner.hidden { display: none; }

.settings-drawer {
  margin: 10px 16px;
  padding: 16px;
  background: var(--panel);
  border-radius: var(--radius);
  border: 1px solid var(--panel-border);
}
.settings-drawer.hidden { display: none; }
.settings-drawer label { display: flex; flex-direction: column; gap: 6px; margin-bottom: 10px; font-size: 0.85rem; color: var(--muted); }
.settings-drawer input {
  padding: 12px; border-radius: 10px;
  border: 1px solid var(--panel-border);
  background: #0b1220; color: var(--text); font-size: 16px;
}
.row-actions { display: flex; gap: 8px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  border: none; border-radius: 12px;
  padding: 14px 18px;
  font-weight: 700; font-size: 1rem;
  cursor: pointer; text-decoration: none;
}
.btn.primary { background: var(--accent); color: #111827; }
.btn.ghost { background: transparent; color: var(--text); border: 1px solid var(--panel-border); }

/* Cart bar */
.cart-bar {
  position: fixed; left: 0; right: 0; bottom: 0;
  z-index: 45;
  padding: 10px 16px calc(10px + var(--safe-bottom));
  background: rgba(15,23,42,0.98);
  border-top: 1px solid var(--panel-border);
  max-width: 520px; margin: 0 auto;
}
.cart-bar.hidden { display: none; }
.cart-bar-btn {
  width: 100%;
  display: flex; align-items: center; gap: 12px;
  padding: 16px 18px;
  border: none; border-radius: var(--radius);
  background: var(--accent);
  color: #111827;
  font-weight: 800;
  font-size: 1.05rem;
  cursor: pointer;
}
.cart-count {
  background: #111827; color: var(--accent);
  border-radius: 999px;
  min-width: 32px; height: 32px;
  display: grid; place-items: center;
  font-size: 0.9rem;
}
.cart-bar-label { flex: 1; text-align: left; }

/* Sheets */
.cart-sheet, .sale-sheet, .scan-sheet {
  position: fixed; inset: 0; z-index: 50;
}
.cart-sheet.hidden, .sale-sheet.hidden, .scan-sheet.hidden { display: none; }

.sheet-backdrop {
  position: absolute; inset: 0;
  background: rgba(0,0,0,0.6);
}

.sheet-panel {
  position: absolute; left: 0; right: 0; bottom: 0;
  background: var(--panel);
  border-top-left-radius: 20px;
  border-top-right-radius: 20px;
  border: 1px solid var(--panel-border);
  max-height: 92vh;
  display: flex;
  flex-direction: column;
}

.cart-panel { max-height: 94vh; }

.sheet-handle {
  width: 40px; height: 4px;
  background: var(--panel-border);
  border-radius: 999px;
  margin: 10px auto 0;
}

.cart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 16px 12px;
  border-bottom: 1px solid var(--panel-border);
}
.cart-header h3 {
  flex: 1;
  margin: 0;
  font-size: 1.1rem;
}

.sheet-back {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  color: var(--text);
  font-size: 1.2rem;
  cursor: pointer;
  flex-shrink: 0;
}

.sheet-close {
  width: 40px; height: 40px;
  border: none; border-radius: 999px;
  background: var(--panel-border);
  color: var(--text);
  font-size: 1.4rem;
  cursor: pointer;
}

.scroll-area {
  flex: 1;
  overflow-y: auto;
  padding: 12px 16px;
  min-height: 80px;
  max-height: 38vh;
}

.cart-line {
  padding: 12px;
  border-radius: 12px;
  background: rgba(15,23,42,0.45);
  border: 1px solid var(--panel-border);
  margin-bottom: 10px;
}
.cart-line-top {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  align-items: flex-start;
}
.cart-line h4 { margin: 0; font-size: 0.95rem; line-height: 1.3; flex: 1; }
.cart-line-price { font-weight: 800; color: var(--accent); white-space: nowrap; }
.cart-line-meta { font-size: 0.78rem; color: var(--muted); margin-top: 4px; }

.qty-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}
.qty-btn {
  width: 44px; height: 44px;
  border-radius: 12px;
  border: 1px solid var(--panel-border);
  background: var(--bg);
  color: var(--text);
  font-size: 1.25rem;
  font-weight: 700;
  cursor: pointer;
}
.qty-btn.remove { font-size: 1rem; margin-left: auto; }
.qty-value { font-size: 1.1rem; font-weight: 800; min-width: 24px; text-align: center; }

.checkout-box {
  padding: 14px 16px calc(16px + var(--safe-bottom));
  border-top: 1px solid var(--panel-border);
  background: rgba(15,23,42,0.5);
}

.field-label {
  display: block;
  font-size: 0.78rem;
  color: var(--muted);
  margin: 10px 0 6px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.field-label:first-child { margin-top: 0; }

.field-input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--panel-border);
  background: #0b1220;
  color: var(--text);
  font-size: 16px;
}

.pay-row {
  display: flex;
  gap: 8px;
}
.pay-pill {
  flex: 1;
  padding: 12px 8px;
  border-radius: 12px;
  border: 1px solid var(--panel-border);
  background: var(--bg);
  color: var(--muted);
  font-weight: 700;
  font-size: 0.82rem;
  cursor: pointer;
}
.pay-pill.active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}

.pay-hint {
  font-size: 0.78rem;
  color: var(--warn);
  margin: 6px 0 0;
}
.pay-hint.hidden { display: none; }

.cart-summary {
  margin: 14px 0;
  font-size: 0.92rem;
}
.cart-summary > div {
  display: flex;
  justify-content: space-between;
  margin-bottom: 6px;
}
.cart-total-row { font-size: 1.15rem; font-weight: 800; margin-top: 4px; }
.due-row { color: var(--warn); }
.due-row.hidden { display: none; }

.checkout-btn { width: 100%; padding: 16px; font-size: 1.05rem; }
.checkout-status { min-height: 1.2em; font-size: 0.85rem; color: var(--accent); margin: 8px 0 0; text-align: center; }

.qr-reader {
  width: 100%;
  min-height: 260px;
  background: #000;
  border-radius: 12px;
  overflow: hidden;
  margin: 0 16px;
  width: calc(100% - 32px);
}
.scan-hint { text-align: center; color: var(--muted); font-size: 0.85rem; padding: 12px 16px 20px; }

.scan-panel { padding-bottom: calc(16px + var(--safe-bottom)); }

.sale-panel { max-height: 90vh; }

.sale-detail-body {
  overflow-y: auto;
  padding: 12px 16px calc(20px + var(--safe-bottom));
  -webkit-overflow-scrolling: touch;
}

.sale-meta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 16px;
}

.sale-meta-item {
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.sale-meta-item span {
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.sale-meta-item strong {
  font-size: 0.92rem;
  font-weight: 700;
  word-break: break-word;
  line-height: 1.3;
}

.sale-status { text-transform: capitalize; color: var(--ok); }

.sale-section-title {
  margin: 0 0 10px;
  font-size: 0.85rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.sale-lines { display: flex; flex-direction: column; gap: 8px; }

.sale-line {
  background: rgba(15, 23, 42, 0.45);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 12px;
}

.sale-line-top {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.sale-line-no {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background: rgba(249, 115, 22, 0.18);
  color: var(--accent);
  display: grid;
  place-items: center;
  font-size: 0.78rem;
  font-weight: 800;
  flex-shrink: 0;
}

.sale-line-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sale-line-info strong {
  font-size: 0.95rem;
  line-height: 1.3;
  word-break: break-word;
}

.sale-line-info span {
  font-size: 0.8rem;
  color: var(--muted);
}

.sale-line-total {
  font-weight: 800;
  color: var(--accent);
  white-space: nowrap;
  font-size: 0.95rem;
}

.sale-totals {
  margin-top: 16px;
  padding: 14px;
  border-radius: 14px;
  border: 1px solid var(--panel-border);
  background: rgba(15, 23, 42, 0.55);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sale-totals > div {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
}

.sale-totals > div span { color: var(--muted); }
.sale-totals > div.due strong { color: var(--warn); }
.sale-totals > div.grand {
  padding-top: 8px;
  margin-top: 4px;
  border-top: 1px solid var(--panel-border);
  font-size: 1.1rem;
}
.sale-totals > div.grand strong {
  color: var(--accent);
  font-size: 1.2rem;
  font-weight: 800;
}

.stock-low { color: var(--danger); }
.stock-ok { color: var(--ok); }

.queue-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin: 0 16px 8px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(249, 115, 22, 0.15);
  border: 1px solid rgba(249, 115, 22, 0.35);
  color: var(--text);
  font-size: 0.85rem;
}

.sale-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.return-qty-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 8px 0 0 36px;
  font-size: 0.82rem;
  color: var(--muted);
}

.return-qty-row input {
  width: 72px;
  padding: 6px 8px;
  border-radius: 8px;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  color: var(--text);
}

.stock-search {
  margin: 0 0 10px;
  width: 100%;
}

.receive-row {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.receive-row input {
  flex: 1;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  color: var(--text);
}

.receipt-actions {
  padding: 12px 16px 20px;
  border-top: 1px solid var(--panel-border);
}

.receipt-shop {
  margin: 0 0 4px;
  font-size: 1.25rem;
  text-align: center;
}

.receipt-body {
  padding-bottom: 8px;
}

.modules-lock-banner {
  margin: 12px 16px;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid rgba(239, 68, 68, 0.45);
  background: rgba(127, 29, 29, 0.45);
  color: #fecaca;
  font-size: 0.9rem;
  line-height: 1.45;
  z-index: 50;
}
.modules-lock-banner .muted { color: #fca5a5; font-size: 0.82rem; }
.modules-lock-banner.hidden { display: none; }

body.modules-locked .pos-main,
body.modules-locked .cart-bar,
body.modules-locked .cart-sheet,
body.modules-locked .scan-btn {
  pointer-events: none;
  opacity: 0.35;
  filter: grayscale(0.4);
}

/* Receipt: hidden on screen, only content printed */
.print-root {
  display: none;
}

@media print {
  body * {
    visibility: hidden !important;
  }
  body.printing .print-root,
  body.printing .print-root * {
    visibility: visible !important;
  }
  body.printing .print-root {
    display: block !important;
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    padding: 12px;
    color: #111;
    background: #fff;
    font-family: ui-monospace, Consolas, monospace;
  }
  .pos-app,
  .cart-bar,
  .cart-sheet,
  .sale-sheet,
  .scan-sheet {
    display: none !important;
  }
  .receipt-sheet h1 {
    font-size: 18px;
    margin: 0 0 4px;
  }
  .receipt-sheet .muted {
    color: #555;
    font-size: 12px;
  }
  .receipt-sheet table {
    width: 100%;
    border-collapse: collapse;
    margin: 12px 0;
    font-size: 13px;
  }
  .receipt-sheet th,
  .receipt-sheet td {
    padding: 4px 0;
    border-bottom: 1px dashed #ccc;
    text-align: left;
  }
  .receipt-sheet .num {
    text-align: right;
  }
  .receipt-sheet .tot {
    margin-top: 10px;
    font-size: 14px;
  }
  .receipt-sheet .tot div {
    display: flex;
    justify-content: space-between;
    margin: 3px 0;
  }
  .receipt-sheet .grand {
    font-weight: 800;
    font-size: 16px;
    border-top: 1px solid #111;
    padding-top: 6px;
    margin-top: 6px;
  }
}

@media (min-width: 521px) {
  .pos-app {
    border-left: 1px solid var(--panel-border);
    border-right: 1px solid var(--panel-border);
  }
}