/* ============================================================
   FlashPOS — Premium Dark Theme CSS
   ============================================================ */

/* Google Fonts already loaded in base.html */

/* === CSS Variables === */
:root {
  --bg-base: #0a0b14;
  --bg-surface: #111827;
  --bg-card: #1a2236;
  --bg-card-hover: #1e2a42;
  --bg-input: #0f172a;
  --bg-input-focus: #1e293b;

  --border: rgba(255, 255, 255, 0.07);
  --border-focus: rgba(139, 92, 246, 0.5);

  --primary: #8b5cf6;
  --primary-hover: #7c3aed;
  --primary-glow: rgba(139, 92, 246, 0.25);
  --cyan: #06b6d4;
  --cyan-glow: rgba(6, 182, 212, 0.2);
  --green: #10b981;
  --green-glow: rgba(16, 185, 129, 0.2);
  --amber: #f59e0b;
  --amber-glow: rgba(245, 158, 11, 0.2);
  --red: #ef4444;
  --red-glow: rgba(239, 68, 68, 0.2);

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #475569;
  --text-link: #8b5cf6;

  --sidebar-width: 240px;
  --topbar-height: 64px;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 30px rgba(139,92,246,0.15);

  --transition: 0.2s cubic-bezier(0.4,0,0.2,1);
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  display: flex;
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.5;
}

/* === Scrollbar === */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(139,92,246,0.4); border-radius: 99px; }

/* ============================================================
   Sidebar
   ============================================================ */
.sidebar {
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  width: var(--sidebar-width);
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: width var(--transition), transform var(--transition);
  overflow: hidden;
}

.sidebar.collapsed { width: 68px; }

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 16px;
  border-bottom: 1px solid var(--border);
  min-height: var(--topbar-height);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  white-space: nowrap;
}

.logo-icon {
  font-size: 22px;
  flex-shrink: 0;
  filter: drop-shadow(0 0 8px rgba(139,92,246,0.7));
}

.logo-text {
  font-size: 16px;
  font-weight: 800;
  background: linear-gradient(135deg, #8b5cf6, #06b6d4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: opacity var(--transition);
  font-family: 'Noto Sans Tamil', 'Inter', sans-serif;
}

.logo-texts { display: flex; flex-direction: column; }
.logo-sub { font-size: 9px; color: var(--text-muted); font-family: 'Inter', monospace; margin-top: -2px; }

.sidebar.collapsed .logo-texts { opacity: 0; width: 0; }


.sidebar-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 6px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  transition: background var(--transition), color var(--transition);
  flex-shrink: 0;
}
.sidebar-toggle svg { width: 18px; height: 18px; }
.sidebar-toggle:hover { background: rgba(255,255,255,0.07); color: var(--text-primary); }

/* Navigation */
.sidebar-nav {
  flex: 1;
  padding: 12px 0;
  overflow-y: auto;
  overflow-x: hidden;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 16px;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 0;
  transition: all var(--transition);
  white-space: nowrap;
  position: relative;
  font-size: 14px;
  font-weight: 500;
  border-left: 3px solid transparent;
  margin: 2px 0;
}

.nav-item:hover {
  background: rgba(139,92,246,0.08);
  color: var(--text-primary);
}

.nav-item.active {
  background: rgba(139,92,246,0.12);
  color: var(--primary);
  border-left-color: var(--primary);
}

.nav-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: rgba(255,255,255,0.04);
  transition: background var(--transition);
}
.nav-icon svg { width: 16px; height: 16px; }
.nav-item.active .nav-icon { background: rgba(139,92,246,0.2); }

.nav-label { transition: opacity var(--transition); flex: 1; }
.sidebar.collapsed .nav-label { opacity: 0; width: 0; overflow: hidden; }

.nav-badge {
  font-size: 10px;
  font-weight: 600;
  background: var(--green);
  color: white;
  padding: 2px 7px;
  border-radius: 99px;
  letter-spacing: 0.05em;
  animation: pulse-badge 2s infinite;
}
.sidebar.collapsed .nav-badge { display: none; }

@keyframes pulse-badge {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

/* Sidebar Footer */
.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
  overflow: hidden;
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}

.user-name { font-size: 13px; font-weight: 600; }
.user-role { font-size: 11px; color: var(--text-muted); }
.sidebar.collapsed .user-details { opacity: 0; width: 0; }

/* ============================================================
   Main Content
   ============================================================ */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: margin-left var(--transition);
}

.main-content.sidebar-collapsed { margin-left: 68px; }

.top-bar {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--topbar-height);
  background: rgba(10, 11, 20, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}

.page-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.time-display {
  font-family: 'Inter', monospace;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.04);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.content-area { padding: 24px; flex: 1; }

/* ============================================================
   Cards
   ============================================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.card:hover { box-shadow: var(--shadow); }

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

.card-body { padding: 20px; }
.card-body.p0 { padding: 0; }
.card-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  background: rgba(0,0,0,0.2);
}

/* ============================================================
   Stat Cards
   ============================================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 120px; height: 120px;
  border-radius: 50%;
  opacity: 0.08;
  transform: translate(30%, -30%);
}

.stat-card--primary::before { background: var(--primary); }
.stat-card--cyan::before { background: var(--cyan); }
.stat-card--purple::before { background: #a855f7; }
.stat-card--green::before { background: var(--green); }

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.stat-card--primary:hover { border-color: rgba(139,92,246,0.4); box-shadow: var(--shadow-glow); }
.stat-card--cyan:hover { border-color: rgba(6,182,212,0.4); box-shadow: 0 0 30px var(--cyan-glow); }
.stat-card--green:hover { border-color: rgba(16,185,129,0.4); box-shadow: 0 0 30px var(--green-glow); }

.stat-icon { font-size: 28px; flex-shrink: 0; }
.stat-label { font-size: 12px; color: var(--text-secondary); font-weight: 500; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 4px; }
.stat-value { font-size: 26px; font-weight: 800; color: var(--text-primary); line-height: 1.2; }
.stat-sub { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* ============================================================
   Charts
   ============================================================ */
.charts-row {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.chart-card { }
.chart-card--wide { }

.tables-row {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 16px;
  margin-bottom: 24px;
}

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

.table th {
  background: rgba(0,0,0,0.3);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.table td {
  padding: 13px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  color: var(--text-primary);
  vertical-align: middle;
}

.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:hover td { background: rgba(139,92,246,0.04); }

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  color: white;
  box-shadow: 0 4px 12px var(--primary-glow);
}
.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, #7c3aed, #6d28d9);
  box-shadow: 0 6px 20px rgba(139,92,246,0.4);
  transform: translateY(-1px);
}

.btn-ghost {
  background: rgba(255,255,255,0.05);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-ghost:hover:not(:disabled) {
  background: rgba(255,255,255,0.1);
  color: var(--text-primary);
}

.btn-sm { padding: 5px 12px; font-size: 12px; }
.btn-icon { padding: 8px; }
.btn-checkout {
  width: 100%;
  padding: 14px;
  font-size: 16px;
  font-weight: 700;
  justify-content: center;
  border-radius: var(--radius);
}

/* ============================================================
   Forms
   ============================================================ */
.form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.form-input, .form-select {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  padding: 10px 12px;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  appearance: none;
}

.form-input:focus, .form-select:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background: var(--bg-input-focus);
}

.form-input::placeholder { color: var(--text-muted); }

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 16px;
  padding-right: 36px;
}

.form-group { margin-bottom: 16px; }
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.form-group--wide { grid-column: 1 / -1; }

/* ============================================================
   Badges
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 99px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: capitalize;
}

.badge--cash { background: rgba(16,185,129,0.15); color: var(--green); }
.badge--card { background: rgba(6,182,212,0.15); color: var(--cyan); }
.badge--mobile { background: rgba(139,92,246,0.15); color: var(--primary); }
.badge--success { background: rgba(16,185,129,0.15); color: var(--green); }
.badge--muted { background: rgba(100,116,139,0.15); color: var(--text-muted); }

/* ============================================================
   Toolbar
   ============================================================ */
.page-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 12px;
  flex-wrap: wrap;
}

.toolbar-left, .toolbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Search */
.search-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 12px;
  width: 16px;
  height: 16px;
  color: var(--text-muted);
  pointer-events: none;
}

.search-input {
  width: 280px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  padding: 9px 12px 9px 38px;
  outline: none;
  transition: all var(--transition);
}

.search-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background: var(--bg-input-focus);
}

.search-input::placeholder { color: var(--text-muted); }
.search-kbd {
  position: absolute;
  right: 10px;
  font-size: 10px;
  color: var(--text-muted);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 5px;
}

/* ============================================================
   POS Terminal Layout
   ============================================================ */
.pos-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 16px;
  height: calc(100vh - var(--topbar-height) - 48px);
}

.pos-products-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow: hidden;
}

.pos-search-bar { flex-shrink: 0; }
.pos-search-bar .search-input { width: 100%; }

/* Category filters */
.category-filters {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  flex-shrink: 0;
  padding-bottom: 4px;
}
.category-filters::-webkit-scrollbar { height: 0; }

.cat-btn {
  padding: 6px 14px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 99px;
  color: var(--text-secondary);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition);
}

.cat-btn:hover { background: rgba(255,255,255,0.1); color: var(--text-primary); }
.cat-btn.active {
  background: var(--primary-glow);
  border-color: var(--primary);
  color: var(--primary);
}

/* Products Grid */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 10px;
  overflow-y: auto;
  padding: 2px;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
  user-select: none;
}

.product-card:hover:not(.out-of-stock) {
  border-color: rgba(139,92,246,0.5);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px var(--primary-glow);
}

.product-card.out-of-stock {
  opacity: 0.5;
  cursor: not-allowed;
}

.product-emoji { font-size: 28px; margin-bottom: 8px; }
.product-name { font-size: 13px; font-weight: 500; color: var(--text-primary); margin-bottom: 6px; line-height: 1.3; }
.product-meta { display: flex; flex-direction: column; gap: 2px; }
.product-price { font-size: 15px; font-weight: 700; color: var(--primary); }
.product-stock { font-size: 11px; color: var(--text-muted); }
.product-stock.low { color: var(--amber); }

/* Loading State */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 48px 24px;
  color: var(--text-muted);
  grid-column: 1 / -1;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid rgba(139,92,246,0.2);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================================
   Cart Panel
   ============================================================ */
.pos-cart-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.cart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}

.cart-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
}

.cart-count {
  background: var(--primary);
  color: white;
  border-radius: 99px;
  min-width: 22px;
  height: 22px;
  padding: 0 6px;
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Customer select */
.cart-customer {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
.cart-customer .form-label { margin-bottom: 4px; }
.cart-customer .form-select { padding: 7px 32px 7px 10px; }

/* Cart Items */
.cart-items {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.cart-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 100%;
  min-height: 140px;
  color: var(--text-muted);
}

.cart-empty-icon { font-size: 40px; }

.cart-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 8px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  border-radius: var(--radius-sm);
  transition: background var(--transition);
  animation: slideIn 0.2s ease;
}

.cart-item:hover { background: rgba(255,255,255,0.03); }
.cart-item-info { flex: 1; min-width: 0; }
.cart-item-name { font-size: 13px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cart-item-price { font-size: 11px; color: var(--text-muted); }
.cart-item-controls { display: flex; align-items: center; gap: 6px; flex-shrink: 0; }
.qty-btn {
  width: 26px; height: 26px;
  background: rgba(255,255,255,0.07);
  border: none;
  border-radius: 6px;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 16px;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition);
}
.qty-btn:hover { background: var(--primary-glow); }
.qty-value { font-size: 14px; font-weight: 600; min-width: 20px; text-align: center; }
.cart-item-total { font-size: 13px; font-weight: 700; flex-shrink: 0; min-width: 50px; text-align: right; }
.cart-item-remove { background: none; border: none; color: var(--text-muted); cursor: pointer; padding: 2px 4px; font-size: 12px; flex-shrink: 0; transition: color var(--transition); border-radius: 4px; }
.cart-item-remove:hover { color: var(--red); background: var(--red-glow); }

@keyframes slideIn { from { opacity: 0; transform: translateX(-10px); } to { opacity: 1; transform: none; } }

/* Cart Summary */
.cart-summary {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.summary-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 5px 0;
  font-size: 13px;
  color: var(--text-secondary);
}

.summary-total {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-primary);
  padding-top: 8px;
  margin-top: 4px;
  border-top: 1px solid var(--border);
}

.discount-input-wrap {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--text-secondary);
}

.discount-input {
  width: 70px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 13px;
  font-family: inherit;
  padding: 4px 8px;
  text-align: right;
  outline: none;
}
.discount-input:focus { border-color: var(--border-focus); }

/* Payment */
.payment-section { padding: 12px 16px; }

.payment-methods {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.pay-btn {
  flex: 1;
  padding: 8px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}

.pay-btn:hover { background: rgba(255,255,255,0.1); color: var(--text-primary); }
.pay-btn.active { background: var(--primary-glow); border-color: var(--primary); color: var(--primary); }

.amount-paid-section { margin-bottom: 10px; }

.amount-input-wrap {
  display: flex;
  align-items: center;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0 12px;
  margin-bottom: 8px;
  transition: border-color var(--transition);
}
.amount-input-wrap:focus-within { border-color: var(--border-focus); box-shadow: 0 0 0 3px var(--primary-glow); }
.amount-currency { color: var(--text-muted); font-size: 16px; }
.amount-input { flex: 1; background: none; border: none; color: var(--text-primary); font-size: 18px; font-weight: 600; font-family: inherit; padding: 10px 8px; outline: none; }

.quick-amounts { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 8px; }
.quick-amount-btn {
  padding: 5px 10px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 12px;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}
.quick-amount-btn:hover { background: var(--primary-glow); border-color: var(--primary); color: var(--primary); }

.change-display {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(16,185,129,0.3);
  border-radius: var(--radius-sm);
  font-size: 14px;
  margin-bottom: 8px;
}
.change-amount { font-size: 18px; font-weight: 700; }

/* ============================================================
   Receipt
   ============================================================ */
.receipt {
  font-family: 'Courier New', monospace;
  font-size: 13px;
}

.receipt-header { text-align: center; margin-bottom: 12px; }
.receipt-logo { font-size: 18px; font-weight: bold; font-family: 'Inter', sans-serif; margin-bottom: 6px; }
.receipt-id { font-weight: bold; font-size: 15px; }
.receipt-date, .receipt-customer, .receipt-payment { color: var(--text-secondary); font-size: 12px; margin-top: 3px; }
.receipt-divider { border-top: 1px dashed rgba(255,255,255,0.2); margin: 12px 0; }

.receipt-item {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  gap: 12px;
}

.receipt-totals { margin-top: 4px; }
.receipt-row { display: flex; justify-content: space-between; padding: 4px 0; font-size: 13px; }
.receipt-row--total { font-size: 16px; font-weight: bold; color: var(--text-primary); border-top: 1px solid var(--border); padding-top: 8px; margin-top: 4px; }
.receipt-footer { text-align: center; color: var(--text-muted); font-size: 12px; margin-top: 16px; font-family: 'Inter', sans-serif; }

/* ============================================================
   Modals
   ============================================================ */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.modal-backdrop.open { opacity: 1; pointer-events: auto; }

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  z-index: 2001;
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
  width: 90%;
  max-width: 560px;
}

.modal.open { display: block !important; opacity: 1; pointer-events: auto; transform: translate(-50%, -50%) scale(1); }

.modal-dialog {
  background: var(--bg-card);
  border: 1px solid rgba(139,92,246,0.3);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg), 0 0 40px rgba(139,92,246,0.15);
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  pointer-events: auto !important;
}

.modal-sm { max-width: 420px; }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.modal-header h3 { font-size: 16px; font-weight: 700; }

.modal-close {
  background: rgba(255,255,255,0.07);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-secondary);
  cursor: pointer;
  width: 30px; height: 30px;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
  transition: all var(--transition);
}
.modal-close:hover { background: rgba(239,68,68,0.15); color: var(--red); border-color: var(--red); }

.modal-body { padding: 20px; overflow-y: auto; flex: 1; }
.modal-footer { padding: 16px 20px; border-top: 1px solid var(--border); display: flex; gap: 10px; justify-content: flex-end; flex-shrink: 0; }

/* ============================================================
   Dashboard Specific
   ============================================================ */
.top-products-list { display: flex; flex-direction: column; gap: 12px; }
.top-product-item { display: flex; align-items: center; gap: 12px; }
.top-product-rank { font-size: 13px; font-weight: 700; color: var(--primary); min-width: 24px; }
.top-product-info { flex: 1; min-width: 0; }
.top-product-name { font-size: 13px; font-weight: 500; margin-bottom: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.progress-bar { height: 6px; background: rgba(255,255,255,0.07); border-radius: 99px; overflow: hidden; }
.progress-fill { height: 100%; background: linear-gradient(90deg, var(--primary), var(--cyan)); border-radius: 99px; transition: width 0.6s ease; }
.top-product-revenue { font-size: 13px; font-weight: 700; color: var(--text-primary); flex-shrink: 0; }

.low-stock-list { padding: 4px 0; }
.low-stock-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  transition: background var(--transition);
}
.low-stock-item:hover { background: rgba(255,255,255,0.02); }
.low-stock-name { font-size: 13px; font-weight: 500; }
.low-stock-sku { font-size: 11px; color: var(--text-muted); }
.low-stock-count { font-size: 12px; font-weight: 700; }

.sale-id { font-weight: 600; color: var(--primary); }

/* ============================================================
   Products Page
   ============================================================ */
.products-stats {
  display: flex;
  gap: 20px;
  font-size: 13px;
  margin-bottom: 14px;
}
.stat-strip-item { color: var(--text-secondary); }
.product-name-cell { display: flex; align-items: center; gap: 10px; }
.product-icon { font-size: 20px; }
.sku-code { background: rgba(139,92,246,0.1); color: var(--primary); padding: 2px 8px; border-radius: 4px; font-size: 12px; }
.action-btns { display: flex; gap: 6px; }

/* ============================================================
   Customers Grid
   ============================================================ */
.customers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.customer-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: all var(--transition);
}

.customer-card:hover {
  border-color: rgba(139,92,246,0.3);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.customer-avatar {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--cyan));
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 700;
  flex-shrink: 0;
}

.customer-name { font-size: 15px; font-weight: 700; }
.customer-email, .customer-phone { font-size: 12px; color: var(--text-muted); }

.customer-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  padding: 12px;
  background: rgba(0,0,0,0.2);
  border-radius: var(--radius-sm);
}

.customer-stat { text-align: center; }
.customer-stat-value { font-size: 14px; font-weight: 700; }
.customer-stat-label { font-size: 10px; color: var(--text-muted); margin-top: 2px; }

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

/* ============================================================
   Reports
   ============================================================ */
.reports-toolbar {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 16px;
}

.period-selector {
  display: flex;
  gap: 4px;
  background: rgba(255,255,255,0.04);
  padding: 4px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.period-btn {
  padding: 6px 14px;
  background: none;
  border: none;
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
}
.period-btn:hover { color: var(--text-primary); background: rgba(255,255,255,0.07); }
.period-btn.active { background: var(--primary); color: white; box-shadow: 0 2px 8px var(--primary-glow); }

/* ============================================================
   Pagination
   ============================================================ */
.pagination { display: flex; gap: 6px; align-items: center; }
.page-btn {
  padding: 6px 12px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}
.page-btn:hover { background: rgba(255,255,255,0.1); color: var(--text-primary); }
.page-btn.active { background: var(--primary); color: white; border-color: var(--primary); }

/* ============================================================
   Toast Notifications
   ============================================================ */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  font-size: 14px;
  min-width: 260px;
  transform: translateX(110%);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.toast.visible { transform: none; }
.toast--success { border-left: 3px solid var(--green); }
.toast--error { border-left: 3px solid var(--red); }
.toast--warning { border-left: 3px solid var(--amber); }
.toast--info { border-left: 3px solid var(--cyan); }
.toast-icon { font-size: 16px; }
.toast-msg { color: var(--text-primary); font-weight: 500; }

/* ============================================================
   Utility Classes
   ============================================================ */
.text-primary { color: var(--primary); }
.text-success { color: var(--green); }
.text-warning { color: var(--amber); }
.text-danger { color: var(--red); }
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }
.text-sm { font-size: 12px; }
.fw-500 { font-weight: 500; }
.fw-600 { font-weight: 600; }
.fw-700 { font-weight: 700; }
.p-4 { padding: 16px; }
.p0 { padding: 0; }

/* ============================================================
   Print Styles
   ============================================================ */
@media print {
  .sidebar, .top-bar, .modal-header, .modal-footer { display: none !important; }
  .modal-dialog { box-shadow: none; border: none; }
  body { background: white; color: black; }
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .charts-row, .tables-row { grid-template-columns: 1fr; }
  .pos-layout { grid-template-columns: 1fr; grid-template-rows: auto auto; height: auto; }
  .pos-cart-panel { height: auto; }
}

@media (max-width: 768px) {
  :root { --sidebar-width: 0px; }
  .sidebar { transform: translateX(-240px); width: 240px; }
  .sidebar.open { transform: none; }
  .main-content { margin-left: 0; }
  .content-area { padding: 16px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}

/* ============================================================
   Tamil Nadu / India Specific Styles
   ============================================================ */
.gst-badge { font-size:11px; font-weight:600; color:var(--green); background:rgba(16,185,129,0.12); border:1px solid rgba(16,185,129,0.3); padding:4px 10px; border-radius:99px; letter-spacing:0.04em; }
.upi-section { background:rgba(139,92,246,0.08); border:1px solid rgba(139,92,246,0.25); border-radius:var(--radius-sm); padding:12px; margin-bottom:10px; text-align:center; }
.upi-id { font-size:15px; font-weight:700; color:var(--primary); margin-bottom:4px; }
.gst-breakdown { margin:0 16px 4px; padding:8px 12px; background:rgba(6,182,212,0.06); border:1px solid rgba(6,182,212,0.2); border-radius:var(--radius-sm); }
.gst-row { display:flex; justify-content:space-between; font-size:12px; color:var(--cyan); padding:2px 0; }
.product-gst-badge { display:inline-block; font-size:10px; font-weight:600; color:var(--cyan); background:rgba(6,182,212,0.1); border:1px solid rgba(6,182,212,0.2); border-radius:4px; padding:1px 6px; margin-bottom:4px; }
.gst-summary-strip { display:flex; align-items:center; background:rgba(6,182,212,0.06); border:1px solid rgba(6,182,212,0.2); border-radius:var(--radius); margin-bottom:20px; overflow:hidden; }
.gst-strip-item { flex:1; display:flex; flex-direction:column; align-items:center; padding:12px 16px; gap:4px; }
.gst-strip-label { font-size:11px; color:var(--text-muted); text-transform:uppercase; letter-spacing:0.06em; }
.gst-strip-val { font-size:16px; font-weight:700; color:var(--cyan); }
.gst-strip-divider { width:1px; height:40px; background:rgba(6,182,212,0.2); }
.gst-calc-preview { display:flex; gap:16px; flex-wrap:wrap; padding:10px 12px; background:rgba(6,182,212,0.06); border:1px solid rgba(6,182,212,0.2); border-radius:var(--radius-sm); font-size:12px; color:var(--cyan); margin-top:8px; }
.badge--upi { background:rgba(139,92,246,0.15); color:var(--primary); }
.badge--cyan { background:rgba(6,182,212,0.15); color:var(--cyan); }
.nav-label, .page-title, .stat-label, .form-label { font-family:'Noto Sans Tamil','Inter',sans-serif; }

/* ============================================================
   Bootstrap 5 Compatibility Styles
   ============================================================ */
.modal-backdrop.fade.show {
  opacity: 0.6 !important;
}
.modal.fade.show {
  background: rgba(0,0,0,0.4);
}
.card {
  background-color: var(--bg-card) !important;
  border-color: var(--border) !important;
  color: var(--text-primary) !important;
}
.text-muted {
  color: var(--text-secondary) !important;
}
.table {
  color: var(--text-primary) !important;
  border-color: var(--border) !important;
}
.table th, .table td {
  background-color: transparent !important;
  border-bottom-color: var(--border) !important;
  color: var(--text-primary) !important;
}
.progress {
  background-color: rgba(255,255,255,0.07) !important;
}
.form-control, .form-select {
  background-color: var(--bg-input) !important;
  border-color: var(--border) !important;
  color: var(--text-primary) !important;
}
.form-control:focus, .form-select:focus {
  border-color: var(--border-focus) !important;
  background-color: var(--bg-input-focus) !important;
  color: var(--text-primary) !important;
  box-shadow: 0 0 0 3px var(--primary-glow) !important;
}

/* ============================================================
   Language Visibility Rules
   ============================================================ */
html.lang-en .lang-ta { display: none !important; }
html.lang-ta .lang-en { display: none !important; }

/* ============================================================
   Light Theme Variable Overrides
   ============================================================ */
html.theme-light {
  --bg-base: #f1f5f9;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --bg-input: #f8fafc;
  --bg-input-focus: #ffffff;

  --border: rgba(0, 0, 0, 0.08);
  --border-focus: rgba(139, 92, 246, 0.6);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-link: #8b5cf6;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 4px 12px rgba(0,0,0,0.05);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.08);
  --shadow-glow: 0 0 20px rgba(139,92,246,0.1);
}

/* Specific Light Theme Overrides */
html.theme-light body {
  background: var(--bg-base);
  color: var(--text-primary);
}

html.theme-light .top-bar {
  background: rgba(241, 245, 249, 0.8) !important;
  border-bottom-color: var(--border) !important;
}

html.theme-light .time-display {
  background: rgba(0,0,0,0.03) !important;
  border-color: var(--border) !important;
  color: var(--text-secondary) !important;
}

html.theme-light .sidebar {
  background: var(--bg-surface) !important;
  border-right-color: var(--border) !important;
}

html.theme-light .sidebar-header {
  border-bottom-color: var(--border) !important;
}

html.theme-light .sidebar-footer {
  border-top-color: var(--border) !important;
}

html.theme-light .nav-item {
  color: var(--text-secondary) !important;
}

html.theme-light .nav-item:hover {
  background: rgba(139, 92, 246, 0.06) !important;
  color: var(--text-primary) !important;
}

html.theme-light .nav-item.active {
  background: rgba(139, 92, 246, 0.08) !important;
  color: var(--primary) !important;
}

html.theme-light .nav-icon {
  background: rgba(0,0,0,0.03) !important;
}

html.theme-light .table th {
  background: rgba(0, 0, 0, 0.02) !important;
  color: var(--text-secondary) !important;
}

html.theme-light .cat-btn {
  background: rgba(0, 0, 0, 0.04) !important;
  color: var(--text-secondary) !important;
  border-color: var(--border) !important;
}

html.theme-light .cat-btn:hover {
  background: rgba(0, 0, 0, 0.07) !important;
  color: var(--text-primary) !important;
}

html.theme-light .cat-btn.active {
  background: var(--primary-glow) !important;
  border-color: var(--primary) !important;
  color: var(--primary) !important;
}

html.theme-light .product-card {
  background: var(--bg-card) !important;
  border-color: var(--border) !important;
}

html.theme-light .product-card:hover:not(.out-of-stock) {
  background: var(--bg-card-hover) !important;
  border-color: var(--primary) !important;
  box-shadow: 0 4px 16px rgba(139,92,246,0.15) !important;
}

html.theme-light .pos-cart-panel {
  background: var(--bg-card) !important;
  border-color: var(--border) !important;
}

html.theme-light .cart-header, html.theme-light .cart-customer {
  border-bottom-color: var(--border) !important;
}

html.theme-light .cart-item {
  border-bottom-color: rgba(0,0,0,0.03) !important;
}

html.theme-light .cart-item:hover {
  background: rgba(139,92,246,0.03) !important;
}

html.theme-light .cart-summary {
  background: rgba(0,0,0,0.01) !important;
  border-top-color: var(--border) !important;
}

html.theme-light .modal-dialog {
  background: var(--bg-card) !important;
  border-color: var(--border) !important;
  box-shadow: var(--shadow-lg) !important;
}

html.theme-light .modal-header {
  border-bottom-color: var(--border) !important;
}

html.theme-light .modal-footer {
  border-top-color: var(--border) !important;
}

html.theme-light .stat-card {
  background: var(--bg-card) !important;
  border-color: var(--border) !important;
}

html.theme-light .stat-card::before {
  opacity: 0.04 !important;
}

html.theme-light .stat-card--primary:hover {
  border-color: rgba(139,92,246,0.3) !important;
}

html.theme-light .stat-card--cyan:hover {
  border-color: rgba(6,182,212,0.3) !important;
}

html.theme-light .stat-card--green:hover {
  border-color: rgba(16,185,129,0.3) !important;
}

html.theme-light .gst-summary-strip {
  background: rgba(6,182,212,0.03) !important;
  border-color: rgba(6,182,212,0.15) !important;
}

html.theme-light .gst-strip-divider {
  background: rgba(6,182,212,0.15) !important;
}

/* Transitions for Theme Switch Smoothness */
body, aside, main, .card, .stat-card, input, select, button, .top-bar, .table, th, td, .nav-item, .nav-icon {
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease !important;
}