/* ═══════════════════════════════════════════════════════════════════════════
   StoreFlow / TechCross POS — Shared Design System v2
   Premium retail POS look. Blue accent, clean light admin shell.
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─── Design Tokens ─────────────────────────────────────────────────── */
:root {
  /* Shared light admin sidebar */
  --color-sidebar-bg: #ffffff;
  --color-sidebar-hover: #f4f7e8;
  --color-sidebar-active-bg: #eef5bf;
  --color-sidebar-text: #3a3a3c;
  --color-sidebar-hover-text: #1d1d1f;
  --color-sidebar-active-text: #1d1d1f;
  --color-sidebar-section: #8a8a90;

  /* Blue accent — clean, professional */
  --color-blue: #2563eb;
  --color-blue-hover: #1d4ed8;
  --color-blue-ring: rgba(59,130,246,0.25);

  /* Semantics */
  --color-green: #16a34a;
  --color-green-hover: #15803d;
  --color-red: #dc2626;
  --color-red-hover: #b91c1c;
  --color-orange: #f59e0b;
  --color-orange-hover: #d97706;

  /* Surfaces */
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-border: #e2e8f0;
  --color-border-strong: #cbd5e1;

  /* Text */
  --color-text-primary: #0f172a;
  --color-text-secondary: #64748b;
  --color-text-muted: #94a3b8;

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 10px;
  --radius-lg: 20px;
  --radius-xl: 24px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.04), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg: 0 20px 25px rgba(0,0,0,0.10), 0 10px 10px rgba(0,0,0,0.04);

  --font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", Consolas, "Liberation Mono", monospace;
}

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

html, body {
  height: 100%;
  font-family: var(--font-family);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: var(--color-bg);
  color: var(--color-text-primary);
}

/* ─── Layout ────────────────────────────────────────────────────────── */
.layout { display: flex; height: 100vh; }

/* ─── Sidebar ───────────────────────────────────────────────────────── */
body .sidebar {
  width: 240px;
  background: var(--color-sidebar-bg);
  color: var(--color-sidebar-text);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow-y: auto;
  border-right: 1px solid #e5e5e7;
  box-shadow: 1px 0 0 rgba(0,0,0,0.02);
}

body .sidebar .logo {
  padding: 18px 18px 16px;
  text-align: left;
  border-bottom: 1px solid #ececef;
  background: #fafafa;
}

body .sidebar .logo img { height: 34px; }

body .sidebar .logo span {
  display: block;
  font-size: 12px;
  color: #6e6e73;
  margin-top: 6px;
}

body .sidebar nav { flex: 1; overflow-y: auto; padding: 10px; }

body .sidebar nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  margin: 2px 0;
  color: var(--color-sidebar-text);
  text-decoration: none;
  font-size: 13px;
  transition: all 0.15s ease;
  border-left: 0;
  border-radius: 10px;
}

body .sidebar nav a:hover {
  background: var(--color-sidebar-hover);
  color: var(--color-sidebar-hover-text);
  border-left-color: transparent;
}

body .sidebar nav a.active {
  background: var(--color-sidebar-active-bg);
  color: var(--color-sidebar-active-text);
  border-left-color: transparent;
  font-weight: 600;
}

body .sidebar nav a .icon { width: 22px; text-align: center; font-size: 16px; flex-shrink: 0; }

body .sidebar .nav-section {
  padding: 16px 10px 6px;
  font-size: 11px;
  color: var(--color-sidebar-section);
  text-transform: uppercase;
  letter-spacing: 0.7px;
  font-weight: 600;
}

/* ─── Main Area ─────────────────────────────────────────────────────── */
.main { flex: 1; display: flex; flex-direction: column; overflow: hidden; }

.topbar {
  height: 56px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  flex-shrink: 0;
}

.topbar h2 { font-size: 18px; font-weight: 600; }

.topbar .user-info {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.topbar .user-info strong { color: var(--color-text-primary); }

.content { flex: 1; overflow-y: auto; padding: 28px; }

/* ─── Buttons ───────────────────────────────────────────────────────── */
body .btn, body button.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 20px;
  border: none;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  font-family: var(--font-family);
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
  white-space: nowrap;
}

.btn:active { transform: scale(0.97); }

body .btn-primary {
  background: var(--color-blue);
  color: #fff;
  box-shadow: 0 1px 2px rgba(37,99,235,0.3);
}

body .btn-primary:hover {
  background: var(--color-blue-hover);
  box-shadow: 0 2px 6px rgba(37,99,235,0.35);
}

body .btn-secondary {
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  color: var(--color-text-primary);
}

body .btn-secondary:hover { background: var(--color-bg); border-color: #94a3b8; }

body .btn-danger { background: var(--color-red); color: #fff; }

body .btn-danger:hover { background: var(--color-red-hover); }

body .btn-success { background: var(--color-green); color: #fff; }

body .btn-success:hover { background: var(--color-green-hover); }

body .btn-sm { padding: 5px 12px; font-size: 13px; border-radius: var(--radius-sm); }

body .btn-logout {
  padding: 6px 14px;
  border-radius: 980px;
  border: 1px solid var(--color-border-strong);
  background: var(--color-surface);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: var(--font-family);
}

.btn-logout:hover { background: var(--color-red); color: #fff; border-color: var(--color-red); }

/* Action button variants */
.btn-view { background: var(--color-blue); color: #fff; padding: 4px 10px; font-size: 12px; border-radius: var(--radius-sm); border: none; cursor: pointer; transition: all 0.15s; }
.btn-view:hover { background: var(--color-blue-hover); }

.btn-print { background: #e2e8f0; color: #334155; padding: 4px 10px; font-size: 12px; border-radius: var(--radius-sm); border: none; cursor: pointer; transition: all 0.15s; }
.btn-print:hover { background: #cbd5e1; }

.btn-refund { background: var(--color-orange); color: #fff; padding: 4px 10px; font-size: 12px; border-radius: var(--radius-sm); border: none; cursor: pointer; transition: all 0.15s; }
.btn-refund:hover { background: var(--color-orange-hover); }

.btn-delete { background: var(--color-red); color: #fff; padding: 4px 10px; font-size: 12px; border-radius: var(--radius-sm); border: none; cursor: pointer; transition: all 0.15s; }
.btn-delete:hover { background: var(--color-red-hover); }

/* ─── Cards ─────────────────────────────────────────────────────────── */
body .card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 24px;
  margin-bottom: 24px;
  border: 1px solid var(--color-border);
}

/* ─── Toolbar ───────────────────────────────────────────────────────── */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 20px;
}

/* ─── Tables ────────────────────────────────────────────────────────── */
body table { width: 100%; border-collapse: collapse; font-size: 14px; }

body thead th {
  background: #f1f5f9;
  padding: 12px 14px;
  text-align: left;
  font-weight: 600;
  font-size: 11px;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 2px solid var(--color-border);
}

body tbody td {
  padding: 12px 14px;
  border-bottom: 1px solid #f1f5f9;
  vertical-align: middle;
}

body tbody tr:hover { background: #f8fafc; }

body tbody tr:nth-child(even) { background: #fafafa; }

body tbody tr:nth-child(even):hover { background: #f1f5f9; }

body tr.refunded, body .tr-refunded { background: #fef2f2 !important; border-left: 3px solid var(--color-red); }

body tr.refunded:hover, body .tr-refunded:hover { background: #fee2e2 !important; }

/* ─── Badges ────────────────────────────────────────────────────────── */
body .badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
  letter-spacing: 0.2px;
}

.badge-active, .badge-root { background: #dcfce7; color: #166534; }
.badge-inactive, .badge-staff { background: #f1f5f9; color: #64748b; }
.badge-exported { background: #dbeafe; color: #1e40af; }
.badge-invoice { background: #fef3c7; color: #92400e; }
.badge-refunded { background: #fee2e2; color: #991b1b; }
.badge-manager { background: #dbeafe; color: #1e40af; }
.badge-secondhand { background: #fef9c3; color: #854d0e; }
.badge-entry { background: #dcfce7; color: #166534; }
.badge-exit { background: #fee2e2; color: #991b1b; }

/* ─── Modals ────────────────────────────────────────────────────────── */
body .modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(15,23,42,0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  align-items: center;
  justify-content: center;
}

.modal-overlay.show { display: flex; }

.modal {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: 32px;
  max-width: 650px;
  width: 90%;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}

.modal h3 { font-size: 20px; font-weight: 600; margin-bottom: 20px; color: var(--color-text-primary); }

/* ─── Detail Rows ───────────────────────────────────────────────────── */
.detail-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid #f1f5f9;
  font-size: 14px;
}

.detail-row .label { color: var(--color-text-secondary); }
.detail-row .value { font-weight: 500; }

/* ─── Modal Actions ─────────────────────────────────────────────────── */
.modal-actions { display: flex; gap: 12px; justify-content: flex-end; margin-top: 24px; }

/* ─── Toasts ────────────────────────────────────────────────────────── */
.toast {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 10000;
  padding: 14px 24px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  transform: translateX(120%);
  transition: transform 0.3s ease;
  max-width: 400px;
  pointer-events: none;
}

.toast.show { transform: translateX(0); }
.toast.success { background: var(--color-green); color: #fff; }
.toast.error { background: var(--color-red); color: #fff; }
.toast.info { background: var(--color-blue); color: #fff; }
.toast.warning { background: var(--color-orange); color: #fff; }

/* ─── Forms ─────────────────────────────────────────────────────────── */
input[type="text"],
input[type="number"],
input[type="email"],
input[type="password"],
input[type="tel"],
input[type="date"],
input[type="month"],
input[type="week"],
input[type="search"] {
  padding: 9px 14px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-family: var(--font-family);
  background: var(--color-surface);
  color: var(--color-text-primary);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input:focus {
  outline: none;
  border-color: var(--color-blue);
  box-shadow: 0 0 0 3px var(--color-blue-ring);
}

select {
  padding: 9px 14px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-family: var(--font-family);
  background: var(--color-surface);
  color: var(--color-text-primary);
  cursor: pointer;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

select:focus { outline: none; border-color: var(--color-blue); box-shadow: 0 0 0 3px var(--color-blue-ring); }

/* ─── Form Groups ───────────────────────────────────────────────────── */
.form-group { margin-bottom: 18px; }

.form-group label,
.form-group > label {
  display: block;
  font-weight: 500;
  font-size: 14px;
  margin-bottom: 6px;
  color: var(--color-text-primary);
}

.form-group label span { font-weight: 400; color: var(--color-text-secondary); }
.form-group .hint { font-size: 12px; color: var(--color-text-muted); margin-top: 4px; }

.form-row { display: flex; gap: 16px; margin-bottom: 16px; }
.form-row .form-group { flex: 1; margin-bottom: 0; }

/* ─── Tabs ──────────────────────────────────────────────────────────── */
.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 24px;
  border-bottom: 2px solid var(--color-border);
}

.tab {
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  color: var(--color-text-secondary);
  transition: all 0.15s ease;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
  font-family: var(--font-family);
}

.tab:hover { color: var(--color-text-primary); }

.tab.active { color: var(--color-blue); border-bottom-color: var(--color-blue); font-weight: 600; }

.tab-content { display: none; }
.tab-content.active { display: block; }

/* ─── Summary Cards ──────────────────────────────────────────────────── */
.sum-row {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}

.sum-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 18px 14px;
  text-align: center;
  border: 1px solid var(--color-border);
}

.sum-card .sum-label { font-size: 12px; color: var(--color-text-secondary); margin-bottom: 6px; font-weight: 500; }

.sum-card .sum-value { font-size: 22px; font-weight: 700; color: var(--color-text-primary); }

.sum-card .sum-value.green { color: var(--color-green); }
.sum-card .sum-value.red { color: var(--color-red); }

/* ─── Pagination ────────────────────────────────────────────────────── */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 20px;
}

.pagination button {
  padding: 7px 18px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text-primary);
  font-size: 13px;
  font-family: var(--font-family);
  cursor: pointer;
  transition: all 0.15s ease;
}

.pagination button:hover:not(:disabled) { background: var(--color-bg); border-color: #94a3b8; }
.pagination button:disabled { opacity: 0.3; cursor: not-allowed; }
.pagination span { font-size: 13px; color: var(--color-text-secondary); }

/* ─── Loading / Empty States ────────────────────────────────────────── */
.no-data { text-align: center; padding: 48px; color: var(--color-text-muted); font-size: 15px; }

/* ─── Error Box ─────────────────────────────────────────────────────── */
.pos-error-box {
  display: none;
  background: #fef2f2;
  color: #991b1b;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  margin-bottom: 12px;
  border: 1px solid #fecaca;
}

/* ─── VAT Table ─────────────────────────────────────────────────────── */
.vat-table { width: 100%; border-collapse: collapse; font-size: 13px; margin-top: 16px; }
.vat-table th { background: #f1f5f9; padding: 10px 8px; text-align: left; font-weight: 600; font-size: 12px; border-bottom: 1px solid var(--color-border); }
.vat-table td { padding: 8px; border-bottom: 1px solid #f1f5f9; }
.vat-table tr.total-row, tr.total-row, .total-row { font-weight: 700; background: #fef9c3 !important; }

/* ─── Print ─────────────────────────────────────────────────────────── */
@media print {
  .sidebar, .topbar, .toolbar, .tabs, .btn, .btn-sm, button { display: none !important; }
  .layout { display: block; }
  .main { overflow: visible; }
  .content { padding: 0; }
}

/* ─── Language / UI Mode Toggle ─────────────────────────────────────── */
.lang-toggle,
.lang-toggle-dark,
.lang-btn {
  padding: 4px 10px;
  border-radius: 980px;
  border: 1px solid var(--color-border-strong);
  background: var(--color-surface);
  color: var(--color-text-primary);
  font-size: 11px;
  cursor: pointer;
  font-family: var(--font-family);
  font-weight: 500;
  white-space: nowrap;
  transition: all 0.15s ease;
}

.lang-toggle:hover, .lang-toggle-dark:hover, .lang-btn:hover { background: var(--color-bg); }

/* ─── Utility ───────────────────────────────────────────────────────── */
.text-right { text-align: right; }
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.flex-1 { flex: 1; }

/* ─── Responsive ────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar { width: 60px; }
  .sidebar .logo span,
  .sidebar nav a span:not(.icon),
  .sidebar .nav-section { display: none; }
  .sidebar nav a { padding: 10px; justify-content: center; margin: 1px 4px; }
  .topbar { padding: 0 14px; }
  .content { padding: 14px; }
  .card { padding: 16px; }
  .form-row { flex-direction: column; }
}