@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  --bg: #0c0e14;
  --surface: #12141e;
  --card: #181b28;
  --card-hover: #1e2132;
  --border: #262a3a;
  --border-light: #1e2230;
  --text: #e8eaf0;
  --text-muted: #7a7f94;
  --text-dim: #4a4e62;
  --gold: #f0b90b;
  --gold-hover: #d4a308;
  --gold-dim: rgba(240, 185, 11, 0.12);
  --green: #22c55e;
  --green-dim: rgba(34, 197, 94, 0.12);
  --red: #ef4444;
  --red-dim: rgba(239, 68, 68, 0.12);
  --orange: #f59e0b;
  --orange-dim: rgba(245, 158, 11, 0.12);
  --blue: #3b82f6;
  --blue-dim: rgba(59, 130, 246, 0.12);
  --radius: 10px;
  --radius-sm: 6px;
  --radius-lg: 14px;
  --shadow: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.5), 0 2px 8px rgba(0,0,0,0.3);
  --transition: 0.2s ease;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  overflow: hidden;
  height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.pos-container { display: flex; height: 100vh; }
.pos-left { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.pos-right {
  width: 400px;
  background: var(--surface);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: relative;
}

/* ─── Top Bar ─── */
.top-bar {
  display: flex;
  align-items: center;
  padding: 0.6rem 1.25rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  gap: 1rem;
  flex-shrink: 0;
}
.store-name {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--gold);
  letter-spacing: -0.02em;
  white-space: nowrap;
}
.store-name span { color: var(--text); font-weight: 400; }

.search-box { flex: 1; max-width: 420px; position: relative; }
.search-box svg {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--text-muted);
  pointer-events: none;
}
.search-box input {
  width: 100%;
  padding: 0.5rem 0.75rem 0.5rem 2.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 0.85rem;
  font-family: inherit;
  transition: border-color var(--transition);
}
.search-box input:focus { outline: none; border-color: var(--gold); }
.search-box input::placeholder { color: var(--text-dim); }

.top-bar .user-info { font-size: 0.8rem; color: var(--text-muted); white-space: nowrap; }
.top-bar .user-info strong { color: var(--gold); }

.nav-links { display: flex; gap: 0.25rem; }
.nav-links a {
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: all var(--transition);
}
.nav-links a:hover { color: var(--text); background: var(--card); }
.nav-links a.active { color: var(--gold); background: var(--gold-dim); }

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1rem;
  transition: all var(--transition);
}
.btn-icon:hover { border-color: var(--gold); color: var(--gold); background: var(--gold-dim); }

/* ─── Wallet Status Bar ─── */
.wallet-bar {
  display: flex;
  align-items: center;
  padding: 0.35rem 1.25rem;
  gap: 1.25rem;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  font-size: 0.75rem;
  flex-shrink: 0;
}
.wallet-bar .stat { display: flex; align-items: center; gap: 0.4rem; color: var(--text-muted); }
.wallet-bar .stat .dot {
  width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0;
}
.wallet-bar .stat .dot.online { background: var(--green); box-shadow: 0 0 6px rgba(34,197,94,0.5); }
.wallet-bar .stat .dot.offline { background: var(--text-dim); }
.wallet-bar .stat strong { color: var(--gold); }

/* ─── Category Bar ─── */
.category-bar {
  display: flex;
  gap: 0.35rem;
  padding: 0.6rem 1.25rem;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  flex-shrink: 0;
  scrollbar-width: none;
}
.category-bar::-webkit-scrollbar { display: none; }
.category-btn {
  padding: 0.3rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition);
}
.category-btn:hover { border-color: var(--text-dim); color: var(--text); }
.category-btn.active { background: var(--gold-dim); border-color: var(--gold); color: var(--gold); }

/* ─── Product Grid ─── */
.product-grid {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 1.25rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 0.6rem;
  align-content: start;
}
.product-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 0.75rem;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.product-card:hover {
  border-color: var(--gold);
  background: var(--card-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}
.product-card .name { font-size: 0.82rem; font-weight: 600; line-height: 1.3; }
.product-card .sku { font-size: 0.65rem; color: var(--text-dim); }
.product-card .price { font-size: 1.15rem; color: var(--gold); font-weight: 700; margin-top: 0.15rem; }
.product-card .stock { font-size: 0.7rem; font-weight: 500; padding: 0.15rem 0.4rem; border-radius: 4px; display: inline-block; width: fit-content; margin: 0.15rem auto 0; }
.product-card .stock.ok { background: var(--green-dim); color: var(--green); }
.product-card .stock.low { background: var(--orange-dim); color: var(--orange); }
.product-card .stock.out { background: var(--red-dim); color: var(--red); }

/* ─── Cart ─── */
.cart-header {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-shrink: 0;
}
.cart-header h3 { font-size: 0.95rem; font-weight: 600; color: var(--text); }
.cart-header h3 span { color: var(--gold); }
.cart-header .item-count {
  font-size: 0.75rem;
  background: var(--gold-dim);
  color: var(--gold);
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-weight: 600;
}

.cart-items { flex: 1; overflow-y: auto; padding: 0.5rem; }
.cart-item {
  display: flex;
  align-items: center;
  padding: 0.5rem 0.4rem;
  gap: 0.5rem;
  border-bottom: 1px solid rgba(38,42,58,0.5);
  font-size: 0.82rem;
  animation: slideIn 0.15s ease;
}
@keyframes slideIn {
  from { opacity: 0; transform: translateX(-10px); }
  to { opacity: 1; transform: translateX(0); }
}
.cart-item .qty { display: flex; align-items: center; gap: 0.2rem; }
.cart-item .qty button {
  width: 26px; height: 26px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  font-size: 0.85rem;
  font-family: inherit;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.cart-item .qty button:hover { border-color: var(--gold); color: var(--gold); }
.cart-item .qty span { min-width: 22px; text-align: center; font-weight: 600; font-size: 0.85rem; }
.cart-item .item-name { flex: 1; font-weight: 500; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cart-item .item-price { color: var(--gold); font-weight: 600; min-width: 55px; text-align: right; font-size: 0.85rem; }
.cart-item .remove-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.9rem;
  padding: 0.15rem;
  transition: color var(--transition);
}
.cart-item .remove-btn:hover { color: var(--red); }

/* ─── Cart Footer ─── */
.cart-footer {
  padding: 0.85rem 1rem;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.barcode-row {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
}
.barcode-row input {
  flex: 1;
  padding: 0.45rem 0.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 0.82rem;
  font-family: inherit;
  transition: border-color var(--transition);
}
.barcode-row input:focus { outline: none; border-color: var(--gold); }
.barcode-row input::placeholder { color: var(--text-dim); }

.payment-methods {
  display: flex;
  gap: 0.3rem;
  flex-wrap: wrap;
  margin-bottom: 0.6rem;
}
.pm-btn {
  flex: 1;
  min-width: 55px;
  padding: 0.35rem 0.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  font-size: 0.68rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  text-align: center;
  line-height: 1.2;
  transition: all var(--transition);
}
.pm-btn:hover { border-color: var(--text-dim); color: var(--text); }
.pm-btn.active { border-color: var(--gold); color: var(--gold); background: var(--gold-dim); }
.pm-btn .pm-label { display: block; font-size: 0.62rem; color: var(--text-dim); margin-top: 0.1rem; }

.cart-summary { margin-bottom: 0.5rem; }
.cart-summary .row {
  display: flex;
  justify-content: space-between;
  padding: 0.2rem 0;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.cart-summary .row.total {
  font-size: 1.1rem;
  color: var(--gold);
  font-weight: 700;
  border-top: 1px solid var(--border);
  padding-top: 0.4rem;
  margin-top: 0.3rem;
}

.checkout-btn {
  width: 100%;
  padding: 0.7rem;
  border-radius: var(--radius-sm);
  border: none;
  background: linear-gradient(135deg, var(--gold), var(--gold-hover));
  color: #000;
  font-size: 0.95rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
}
.checkout-btn:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(240,185,11,0.3); }
.checkout-btn:disabled { opacity: 0.35; cursor: not-allowed; transform: none; box-shadow: none; }

.cart-extra {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.5rem;
}

/* ─── Buttons ─── */
.btn {
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  cursor: pointer;
  font-size: 0.78rem;
  font-family: inherit;
  font-weight: 500;
  transition: all var(--transition);
}
.btn:hover { border-color: var(--text-dim); }
.btn-gold { background: var(--gold-dim); border-color: var(--gold); color: var(--gold); }
.btn-gold:hover { background: rgba(240,185,11,0.2); }
.btn-sm { padding: 0.3rem 0.55rem; font-size: 0.72rem; }

/* ─── Modals ─── */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}
.modal-overlay.active { display: flex; }
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  max-width: 440px;
  width: 92%;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: modalIn 0.2s ease;
}
@keyframes modalIn {
  from { opacity: 0; transform: scale(0.96) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}
.modal h2 { font-size: 1.15rem; font-weight: 700; color: var(--text); margin-bottom: 1rem; text-align: center; }
.modal h2 .gold { color: var(--gold); }

.form-group { margin-bottom: 0.75rem; }
.form-group label { display: block; margin-bottom: 0.3rem; color: var(--text-muted); font-size: 0.78rem; font-weight: 500; }
.form-input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 0.85rem;
  font-family: inherit;
  transition: border-color var(--transition);
}
.form-input:focus { outline: none; border-color: var(--gold); }
.form-input::placeholder { color: var(--text-dim); }

.form-actions { display: flex; gap: 0.5rem; margin-top: 1rem; justify-content: flex-end; }

.close-btn {
  display: block;
  width: 100%;
  margin-top: 0.75rem;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.82rem;
  font-family: inherit;
  transition: all var(--transition);
}
.close-btn:hover { color: var(--text); border-color: var(--text-dim); }

/* ─── Payment Modal ─── */
.payment-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; }
.payment-grid .pm-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  padding: 0.85rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--card);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.85rem;
  color: var(--text);
  transition: all var(--transition);
}
.payment-grid .pm-card:hover { border-color: var(--gold); background: var(--card-hover); }
.payment-grid .pm-card .pm-icon { font-size: 1.5rem; }
.payment-grid .pm-card .pm-name { font-weight: 600; font-size: 0.82rem; }
.payment-grid .pm-card .pm-desc { font-size: 0.68rem; color: var(--text-muted); }
.payment-grid .pm-card.gold { border-color: var(--gold); background: var(--gold-dim); }
.payment-grid .pm-card.blue { border-color: var(--blue); background: var(--blue-dim); }
.payment-grid .pm-card.full { grid-column: span 2; }

/* ─── Receipt ─── */
.receipt {
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--text-muted);
}
.receipt .r-header { text-align: center; margin-bottom: 0.75rem; }
.receipt .r-header .r-name { font-size: 1rem; font-weight: 700; color: var(--gold); }
.receipt .r-header .r-info { font-size: 0.7rem; color: var(--text-dim); }
.receipt hr { border: none; border-top: 1px dashed var(--border); margin: 0.4rem 0; }
.receipt .r-line { display: flex; justify-content: space-between; }
.receipt .r-total { display: flex; justify-content: space-between; font-weight: 700; color: var(--gold); font-size: 0.9rem; margin-top: 0.25rem; }
.receipt .r-footer { text-align: center; margin-top: 0.75rem; color: var(--text-dim); font-size: 0.7rem; }

/* ─── Empty State ─── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-dim);
  gap: 0.5rem;
}
.empty-state .icon { font-size: 2.5rem; opacity: 0.5; }
.empty-state p { font-size: 0.85rem; }

/* ─── Scrollbar ─── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }

/* ─── Receipt Modal ─── */
#receiptModal .modal { max-width: 380px; }

/* ─── Cart toggle (mobile) ─── */
.cart-toggle { display: none; }
.close-cart { display: none; }

/* ─── Mobile ─── */
@media (max-width: 768px) {
  .pos-container { flex-direction: column; }
  .pos-right {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    height: 60vh;
    z-index: 50;
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-top: 1px solid var(--border);
    border-left: none;
    width: 100%;
    box-shadow: 0 -10px 40px rgba(0,0,0,0.5);
  }
  .pos-right.show { transform: translateY(0); }
  .cart-toggle { display: flex; align-items: center; gap: 0.3rem; background: none; border: 1px solid var(--border); color: var(--text); padding: 0.35rem 0.6rem; border-radius: var(--radius-sm); cursor: pointer; font-size: 0.85rem; }
  .close-cart { display: block; background: none; border: none; color: var(--text-dim); font-size: 1.1rem; cursor: pointer; }
  .close-cart:hover { color: var(--text); }

  .nav-links { display: none; }
  .product-grid {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    padding: 0.6rem;
    gap: 0.4rem;
  }
  .product-card { padding: 0.6rem 0.4rem; }
  .product-card .name { font-size: 0.72rem; }
  .product-card .price { font-size: 0.95rem; }
  .top-bar { padding: 0.45rem 0.6rem; gap: 0.5rem; }
  .store-name { font-size: 0.9rem; }
  .search-box input { padding: 0.35rem 0.5rem 0.35rem 1.8rem; font-size: 0.78rem; }
  .pm-btn { font-size: 0.62rem; padding: 0.25rem 0.15rem; min-width: 48px; }
  .payment-methods { gap: 0.2rem; }
  .modal { padding: 1rem; }
  .wallet-bar { padding: 0.3rem 0.75rem; gap: 0.6rem; flex-wrap: wrap; font-size: 0.68rem; }
}