:root {
  --slate-950: #020617;
  --slate-900: #0f172a;
  --slate-800: #1e293b;
  --slate-600: #475569;
  --slate-500: #64748b;
  --slate-400: #94a3b8;
  --slate-200: #e2e8f0;
  --slate-100: #f1f5f9;
  --slate-50: #f8fafc;
  --amber-500: #f59e0b;
  --amber-400: #fbbf24;
  --emerald-600: #059669;
  --emerald-500: #10b981;
  --emerald-50: #ecfdf5;
  --emerald-700: #047857;
  --rose-600: #e11d48;
  --rose-500: #f43f5e;
  --rose-50: #fff1f2;
  --rose-700: #be123c;
  --sky-600: #0284c7;
  --sky-50: #f0f9ff;
  --sky-700: #0369a1;
  --violet-600: #7c3aed;
  --violet-50: #f5f3ff;
  --violet-700: #6d28d9;
  --amber-50: #fffbeb;
  --amber-700: #b45309;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif;
  background: var(--slate-50);
  color: var(--slate-900);
}

.layout { display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar {
  width: 224px;
  background: var(--slate-900);
  display: none;
  flex-direction: column;
  flex-shrink: 0;
}
.brand { display: flex; align-items: center; gap: 10px; padding: 20px; border-bottom: 1px solid var(--slate-800); }
.brand-icon {
  width: 32px; height: 32px; border-radius: 8px; background: var(--amber-500);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 12px; color: var(--slate-900);
}
.brand-icon.small { width: 28px; height: 28px; }
.brand-title { color: #fff; font-size: 14px; font-weight: 600; }
.brand-sub { color: var(--slate-400); font-size: 11px; }
.nav { flex: 1; padding: 12px; display: flex; flex-direction: column; gap: 4px; }
.nav-item {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 8px;
  color: var(--slate-400); background: none; border: none; cursor: pointer; font-size: 14px; font-weight: 500;
  text-align: left; width: 100%;
}
.nav-item:hover { background: var(--slate-800); color: var(--slate-200); }
.nav-item.active { background: rgba(245,158,11,0.1); color: var(--amber-400); }

/* Main */
.main { flex: 1; min-width: 0; display: flex; flex-direction: column; padding-bottom: 64px; }
.topbar {
  display: flex; align-items: center; gap: 10px; padding: 14px 20px;
  background: #fff; border-bottom: 1px solid var(--slate-200);
}
.view { flex: 1; padding: 20px; overflow-y: auto; }

/* Bottom nav */
.bottomnav {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 40;
  display: flex; background: #fff; border-top: 1px solid var(--slate-200);
  overflow-x: auto;
}
.bottomnav .nav-item { min-width: 68px; flex-shrink: 0; }
.bottomnav .nav-item {
  flex: 1; flex-direction: column; gap: 2px; align-items: center; border-radius: 0;
  font-size: 10px; padding: 10px 4px;
}
.bottomnav .nav-item.active { background: none; color: var(--amber-500); }

@media (min-width: 768px) {
  .sidebar { display: flex; }
  .topbar { display: none; }
  .bottomnav { display: none; }
  .main { padding-bottom: 0; }
}

/* Typography helpers */
h1.page-title { font-size: 20px; font-weight: 600; letter-spacing: -0.01em; margin: 0; }
p.page-sub { margin: 4px 0 0; font-size: 13px; color: var(--slate-500); }
.mono { font-variant-numeric: tabular-nums; font-family: "SFMono-Regular", Consolas, monospace; }

/* Grid & cards */
.grid { display: grid; gap: 12px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(2, 1fr); }
@media (min-width: 768px) { .grid-4 { grid-template-columns: repeat(4, 1fr); } .grid-3 { grid-template-columns: repeat(3, 1fr); } .grid-2-lg { grid-template-columns: repeat(2, 1fr); } }

.card {
  background: #fff; border: 1px solid var(--slate-200); border-radius: 12px; padding: 16px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.03);
}
.stat-label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--slate-500); }
.stat-value { font-size: 24px; font-weight: 600; margin-top: 8px; }
.stat-sub { font-size: 12px; color: var(--slate-500); margin-top: 4px; }

/* Buttons */
.btn {
  border: none; border-radius: 8px; padding: 10px 16px; font-size: 14px; font-weight: 500;
  cursor: pointer; display: inline-flex; align-items: center; gap: 6px;
}
.btn-amber { background: var(--amber-500); color: var(--slate-900); }
.btn-amber:hover { background: var(--amber-400); }
.btn-dark { background: var(--slate-900); color: #fff; }
.btn-dark:hover { background: var(--slate-800); }
.btn-emerald { background: var(--emerald-600); color: #fff; }
.btn-rose { background: var(--rose-600); color: #fff; }
.btn-sky { background: var(--sky-600); color: #fff; }
.btn-violet { background: var(--violet-600); color: #fff; }
.btn-ghost { background: none; color: var(--slate-600); }
.btn-block { width: 100%; justify-content: center; }
.btn-tab {
  background: #fff; color: var(--slate-600); border: 1px solid var(--slate-200); border-radius: 8px;
  padding: 8px 14px; font-size: 13px; font-weight: 500; cursor: pointer;
}
.btn-tab.active { background: var(--slate-900); color: #fff; border-color: var(--slate-900); }

/* Badge */
.badge {
  display: inline-flex; align-items: center; border-radius: 999px; padding: 2px 10px;
  font-size: 11px; font-weight: 500; border: 1px solid transparent;
}
.badge-emerald { background: var(--emerald-50); color: var(--emerald-700); border-color: #a7f3d0; }
.badge-rose { background: var(--rose-50); color: var(--rose-700); border-color: #fecdd3; }
.badge-sky { background: var(--sky-50); color: var(--sky-700); border-color: #bae6fd; }
.badge-violet { background: var(--violet-50); color: var(--violet-700); border-color: #ddd6fe; }
.badge-amber { background: var(--amber-50); color: var(--amber-700); border-color: #fde68a; }
.badge-slate { background: var(--slate-100); color: var(--slate-600); border-color: var(--slate-200); }

/* Forms */
label.field { display: block; margin-bottom: 12px; }
label.field span { display: block; font-size: 12px; font-weight: 500; color: var(--slate-600); margin-bottom: 4px; }
input, select {
  width: 100%; border: 1px solid var(--slate-200); border-radius: 8px; padding: 9px 12px;
  font-size: 14px; color: var(--slate-900); background: #fff;
}
input:focus, select:focus { outline: none; border-color: var(--amber-500); box-shadow: 0 0 0 3px rgba(245,158,11,0.15); }

/* Table */
table { width: 100%; border-collapse: collapse; font-size: 13px; }
thead th {
  text-align: left; font-size: 11px; text-transform: uppercase; letter-spacing: 0.03em;
  color: var(--slate-500); background: var(--slate-50); padding: 10px 14px; border-bottom: 1px solid var(--slate-200);
}
tbody td { padding: 10px 14px; border-bottom: 1px solid var(--slate-100); }
tbody tr:hover { background: var(--slate-50); }
.table-wrap { background: #fff; border: 1px solid var(--slate-200); border-radius: 12px; overflow: hidden; overflow-x: auto; }
.text-right { text-align: right; }

/* Toast */
.toast {
  position: fixed; top: 16px; left: 50%; transform: translateX(-50%); z-index: 100;
  background: var(--slate-900); color: #fff; padding: 10px 18px; border-radius: 8px;
  font-size: 13px; font-weight: 500; box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}
.toast.error { background: var(--rose-600); }
.toast.hidden { display: none; }

/* Misc */
.section-title { font-size: 14px; font-weight: 600; padding: 12px 16px; border-bottom: 1px solid var(--slate-100); }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mb-3 { margin-bottom: 12px; }
.text-xs { font-size: 12px; }
.text-slate-400 { color: var(--slate-400); }
.text-slate-500 { color: var(--slate-500); }
.progress { height: 6px; width: 100%; border-radius: 4px; background: var(--slate-100); overflow: hidden; }
.progress > div { height: 100%; background: var(--amber-500); }
.empty { text-align: center; padding: 32px 16px; color: var(--slate-400); font-size: 13px; }
.hidden { display: none !important; }

/* Auth screen */
.auth-screen { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--slate-900); padding: 20px; }
.auth-card { background: #fff; border-radius: 16px; padding: 32px 28px; width: 100%; max-width: 340px; text-align: center; box-shadow: 0 20px 40px rgba(0,0,0,0.25); }
.auth-title { font-size: 18px; font-weight: 600; margin: 0 0 2px; }
.auth-sub { font-size: 12px; color: var(--slate-500); margin: 0 0 20px; }
.auth-card .field { text-align: left; }
.auth-error { background: var(--rose-50); color: var(--rose-700); border: 1px solid #fecdd3; border-radius: 8px; padding: 8px 12px; font-size: 12px; margin-bottom: 14px; }

/* Sidebar user footer */
.sidebar-user { border-top: 1px solid var(--slate-800); padding: 14px 16px; }
.sidebar-user .name { color: #fff; font-size: 13px; font-weight: 500; }
.sidebar-user .role { color: var(--slate-400); font-size: 11px; text-transform: capitalize; }
.sidebar-user button { margin-top: 8px; background: var(--slate-800); color: var(--slate-300); border: none; border-radius: 6px; padding: 6px 10px; font-size: 11px; cursor: pointer; width: 100%; }
.sidebar-user button:hover { background: var(--slate-700, #334155); color: #fff; }

/* Modal */
.modal { position: fixed; inset: 0; z-index: 200; background: rgba(15,23,42,0.6); display: flex; align-items: center; justify-content: center; padding: 16px; }
.modal-card { background: #fff; border-radius: 14px; width: 100%; max-width: 420px; max-height: 90vh; display: flex; flex-direction: column; overflow: hidden; }
.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 14px 16px; border-bottom: 1px solid var(--slate-100); font-weight: 600; font-size: 14px; }
.modal-footer { display: flex; justify-content: flex-end; gap: 8px; padding: 12px 16px; border-top: 1px solid var(--slate-100); }
#scanner-reader { width: 100%; background: #000; min-height: 240px; }
.scanner-cart { padding: 10px 16px; max-height: 200px; overflow-y: auto; }
.scanner-cart-row { display: flex; justify-content: space-between; align-items: center; padding: 8px 0; border-bottom: 1px solid var(--slate-100); font-size: 13px; }
.scanner-cart-row .qty-badge { background: var(--amber-500); color: var(--slate-900); font-weight: 700; border-radius: 999px; padding: 2px 10px; font-size: 12px; }
.scan-target-bar { display: flex; gap: 8px; padding: 10px 16px; border-bottom: 1px solid var(--slate-100); align-items: center; }

/* Barcode */
.barcode-label { border: 1px dashed var(--slate-300, #cbd5e1); border-radius: 8px; padding: 10px; text-align: center; background: #fff; }
.barcode-label svg { max-width: 100%; }
.barcode-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
@media (min-width: 640px) { .barcode-grid { grid-template-columns: repeat(3, 1fr); } }

/* Print */
.print-only { display: none; }
@media print {
  body * { visibility: hidden; }
  #print-area, #print-area * { visibility: visible; }
  #print-area { display: block !important; position: absolute; left: 0; top: 0; width: 100%; padding: 20px; }
  .print-area-title { font-size: 18px; font-weight: 700; margin-bottom: 2px; }
  .print-area-sub { font-size: 12px; color: #475569; margin-bottom: 14px; }
  .print-area table { width: 100%; border-collapse: collapse; font-size: 12px; }
  .print-area th, .print-area td { border: 1px solid #94a3b8; padding: 5px 8px; text-align: left; }
  .print-area th { background: #f1f5f9; }
}