/* ============================================
   PHẦN MỀM BÁN HÀNG & SỬA CHỮA ĐIỆN THOẠI
   Modern Dark Theme - Glassmorphism
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* === CSS Variables === */
:root {
  color-scheme: dark;
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-card-hover: rgba(30, 41, 59, 0.8);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --bg-glass-hover: rgba(255, 255, 255, 0.06);
  --bg-input: rgba(255, 255, 255, 0.05);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-active: rgba(99, 102, 241, 0.5);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-blue: #6366f1;
  --accent-blue-glow: rgba(99, 102, 241, 0.3);
  --accent-purple: #8b5cf6;
  --accent-pink: #ec4899;
  --accent-green: #10b981;
  --accent-yellow: #f59e0b;
  --accent-red: #ef4444;
  --accent-cyan: #06b6d4;
  --gradient-1: linear-gradient(135deg, #6366f1, #8b5cf6);
  --gradient-2: linear-gradient(135deg, #ec4899, #8b5cf6);
  --gradient-3: linear-gradient(135deg, #10b981, #06b6d4);
  --gradient-4: linear-gradient(135deg, #f59e0b, #ef4444);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --sidebar-width: 260px;
}

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

html {
  font-size: 14px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* Background animated gradient */
body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 50% 80%, rgba(236, 72, 153, 0.04) 0%, transparent 50%);
  animation: bgFloat 20s ease-in-out infinite;
  z-index: -1;
}

@keyframes bgFloat {

  0%,
  100% {
    transform: translate(0, 0) rotate(0deg);
  }

  33% {
    transform: translate(2%, -2%) rotate(1deg);
  }

  66% {
    transform: translate(-1%, 1%) rotate(-1deg);
  }
}

/* === Layout === */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* === Sidebar === */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  z-index: 100;
  backdrop-filter: blur(20px);
  transition: var(--transition);
}

.sidebar-header {
  padding: 24px 20px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-logo .logo-icon {
  width: 42px;
  height: 42px;
  background: var(--gradient-1);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  box-shadow: var(--shadow-glow);
}

.sidebar-logo .logo-text {
  font-size: 16px;
  font-weight: 700;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.sidebar-logo .logo-sub {
  font-size: 10px;
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: 0.5px;
}

/* Nav Menu */
.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  overflow-y: auto;
}

.nav-section {
  margin-bottom: 24px;
}

.nav-section-title {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  padding: 0 12px;
  margin-bottom: 8px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 2px;
}

.nav-item:hover {
  background: var(--bg-glass-hover);
  color: var(--text-primary);
}

.nav-item.active {
  background: rgba(99, 102, 241, 0.12);
  color: var(--accent-blue);
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  background: var(--gradient-1);
  border-radius: 0 4px 4px 0;
}

.nav-item .nav-icon {
  font-size: 18px;
  width: 24px;
  text-align: center;
}

.nav-item .nav-badge {
  margin-left: auto;
  background: var(--accent-red);
  color: white;
  font-size: 10px;
  padding: 2px 7px;
  border-radius: 10px;
  font-weight: 600;
}

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

.sidebar-footer .version {
  font-size: 11px;
  color: var(--text-muted);
  text-align: center;
}

/* === Main Content === */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  padding: 28px 32px;
  min-height: 100vh;
}

/* === Page Header === */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}

.page-header h1 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
}

.page-header .page-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* === Cards === */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  backdrop-filter: blur(12px);
  transition: var(--transition);
}

.card:hover {
  border-color: rgba(99, 102, 241, 0.2);
  box-shadow: var(--shadow-glow);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.card-header h2 {
  font-size: 16px;
  font-weight: 600;
}

/* === Stat Cards (Dashboard) === */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.stat-card:nth-child(1)::before {
  background: var(--gradient-1);
}

.stat-card:nth-child(2)::before {
  background: var(--gradient-2);
}

.stat-card:nth-child(3)::before {
  background: var(--gradient-3);
}

.stat-card:nth-child(4)::before {
  background: var(--gradient-4);
}

.stat-card .stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 16px;
}

.stat-card:nth-child(1) .stat-icon {
  background: rgba(99, 102, 241, 0.15);
}

.stat-card:nth-child(2) .stat-icon {
  background: rgba(236, 72, 153, 0.15);
}

.stat-card:nth-child(3) .stat-icon {
  background: rgba(16, 185, 129, 0.15);
}

.stat-card:nth-child(4) .stat-icon {
  background: rgba(245, 158, 11, 0.15);
}

.stat-card .stat-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.stat-card .stat-value {
  font-size: 26px;
  font-weight: 800;
  color: var(--text-primary);
}

.stat-card .stat-sub {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-1);
  color: white;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-glass-hover);
}

.btn-success {
  background: linear-gradient(135deg, #10b981, #059669);
  color: white;
}

.btn-danger {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: white;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 12px;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 15px;
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.btn-icon:hover {
  background: var(--bg-glass-hover);
  color: var(--text-primary);
}

/* === Forms === */
.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 13px;
  transition: var(--transition);
  outline: none;
}

.form-control option {
  background-color: #1a1f2e;
  color: #ffffff;
}

.form-control:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px var(--accent-blue-glow);
}

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

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23f59e0b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
  color: var(--accent-yellow);
  font-weight: 700;
  border-color: rgba(245, 158, 11, 0.3);
  font-family: 'Inter', sans-serif;
}

textarea.form-control {
  min-height: 80px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-row-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
}

/* === Tables === */
.table-container {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.01);
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 600px;
  /* Force scroll on small screens */
}

thead th {
  padding: 12px 16px;
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--border-color);
}

tbody td {
  padding: 12px 16px;
  font-size: 13px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}

tbody tr {
  transition: var(--transition);
}

tbody tr:hover {
  background: var(--bg-glass-hover);
}

tbody tr:last-child td {
  border-bottom: none;
}

/* === Status Badges === */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  gap: 4px;
}

.badge-success {
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
}

.badge-warning {
  background: rgba(245, 158, 11, 0.15);
  color: #f59e0b;
}

.badge-danger {
  background: rgba(239, 68, 68, 0.15);
  color: #ef4444;
}

.badge-info {
  background: rgba(6, 182, 212, 0.15);
  color: #06b6d4;
}

.badge-purple {
  background: rgba(139, 92, 246, 0.15);
  color: #8b5cf6;
}

/* === Modal === */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  width: 90%;
  max-width: 640px;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  transform: scale(0.95) translateY(10px);
  transition: var(--transition);
}

.modal-overlay.active .modal {
  transform: scale(1) translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
  font-size: 18px;
  font-weight: 700;
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: var(--bg-glass);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  font-size: 18px;
}

.modal-close:hover {
  background: rgba(239, 68, 68, 0.2);
  color: var(--accent-red);
}

.modal-body {
  padding: 24px;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

/* === Chat AI === */
.chat-container {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 160px);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.chat-message {
  display: flex;
  gap: 12px;
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.chat-message.user {
  flex-direction: row-reverse;
}

.chat-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.chat-message.ai .chat-avatar {
  background: var(--gradient-1);
}

.chat-message.user .chat-avatar {
  background: var(--gradient-3);
}

.chat-bubble {
  max-width: 70%;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 13px;
  line-height: 1.6;
}

.chat-message.ai .chat-bubble {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
}

.chat-message.user .chat-bubble {
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.chat-input-area {
  padding: 16px 20px;
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 12px;
}

.chat-input-area input {
  flex: 1;
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 13px;
  outline: none;
  transition: var(--transition);
}

.chat-input-area input:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px var(--accent-blue-glow);
}

.chat-input-area button {
  padding: 12px 24px;
  background: var(--gradient-1);
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.chat-input-area button:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

/* === Search Bar === */
.search-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

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

.search-input input {
  width: 100%;
  padding: 10px 14px 10px 40px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 13px;
  outline: none;
  transition: var(--transition);
}

.search-input input:focus {
  border-color: var(--accent-blue);
}

.search-input .search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

/* === Invoice Items (Dynamic) === */
.items-list {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.item-row {
  display: grid;
  grid-template-columns: 2fr 80px 80px 100px 100px 40px;
  gap: 8px;
  padding: 10px 12px;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
}

.item-row:last-child {
  border-bottom: none;
}

.item-row.header {
  background: rgba(255, 255, 255, 0.02);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.item-row input {
  width: 100%;
  padding: 6px 8px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 12px;
  outline: none;
}

.item-row input:focus {
  border-color: var(--accent-blue);
}

.item-row .remove-item {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 16px;
  transition: var(--transition);
  padding: 4px;
}

.item-row .remove-item:hover {
  color: var(--accent-red);
}

/* === Totals Section === */
.totals-section {
  display: flex;
  justify-content: flex-end;
  margin-top: 16px;
}

.totals-table {
  width: 300px;
}

.totals-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  font-size: 13px;
  color: var(--text-secondary);
}

.totals-row.total {
  border-top: 2px solid var(--border-color);
  padding-top: 12px;
  margin-top: 4px;
  font-size: 18px;
  font-weight: 800;
  color: var(--accent-blue);
}

/* === Repair Status Timeline === */
.status-timeline {
  display: flex;
  gap: 4px;
  align-items: center;
}

.status-step {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  color: var(--text-muted);
  padding: 4px 8px;
  border-radius: 12px;
  background: var(--bg-glass);
}

.status-step.active {
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-blue);
}

.status-step.done {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
}

/* === Toast Notifications === */
.toast-container {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -100%);
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 12px;
  pointer-events: none;
}

.toast {
  padding: 20px 40px;
  border-radius: var(--radius-lg);
  font-size: 16px;
  font-weight: 700;
  color: white;
  backdrop-filter: blur(20px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  animation: toastCenterIn 0.5s cubic-bezier(0.17, 0.89, 0.32, 1.49);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
  min-width: 400px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
  pointer-events: auto;
}

.toast.success {
  background: rgba(16, 185, 129, 0.95);
  box-shadow: 0 0 30px rgba(16, 185, 129, 0.4);
}

.toast.error {
  background: rgba(239, 68, 68, 0.95);
  box-shadow: 0 0 30px rgba(239, 68, 68, 0.4);
}

.toast.info {
  background: rgba(99, 102, 241, 0.95);
  box-shadow: 0 0 30px rgba(99, 102, 241, 0.4);
}

@keyframes toastCenterIn {
  from {
    opacity: 0;
    transform: scale(0.5);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Supplemental for Tax Table */
.tax-total-col {
  color: var(--accent-blue);
  font-weight: 700;
}

/* Supplemental for Return Modal */
.ret-invoice-list {
  max-height: 200px;
  overflow-y: auto;
  margin-top: 8px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
}

.ret-invoice-item {
  padding: 8px 12px;
  cursor: pointer;
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
  font-size: 13px;
}

.ret-invoice-item:hover {
  background: var(--bg-glass-hover);
}

.ret-invoice-item:last-child {
  border-bottom: none;
}

/* === Chart Container === */
.chart-container {
  position: relative;
  height: 260px;
  padding: 16px;
}

/* === Empty State === */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-state .empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state .empty-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.empty-state .empty-desc {
  font-size: 13px;
  max-width: 300px;
  margin: 0 auto;
}

/* === Loading === */
.loading-spinner {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* === Scrollbar === */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* === Responsive === */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
    box-shadow: 20px 0 50px rgba(0, 0, 0, 0.5);
  }

  .main-content {
    margin-left: 0;
    padding: 60px 16px 20px 16px;
    /* Space for toggle button */
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .form-row-3 {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .item-row {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    margin-top: 20px;
  }

  .card {
    padding: 16px;
  }

  .form-control {
    padding: 12px;
    /* Bigger touch area */
    font-size: 14px;
  }
}

/* === Page Sections (Hidden by default) === */
.page-section {
  display: none;
  animation: fadeIn 0.3s ease;
}

.page-section.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

/* === Settings Form === */
.settings-card {
  max-width: 600px;
}

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

.tax-item {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
}

.tax-item .tax-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.tax-item .tax-value {
  font-size: 20px;
  font-weight: 700;
}

.tax-item .tax-rate {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Mobile menu toggle */
.mobile-toggle {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 101;
  width: 40px;
  height: 40px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  cursor: pointer;
  font-size: 20px;
  align-items: center;
  justify-content: center;
}

@media (max-width: 1024px) {
  .mobile-toggle {
    display: flex;
  }
}

/* Sidebar Overlay */
.sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.sidebar-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* === POS Styles === */
#page-pos {
  padding: 0;
  max-width: 100%;
}

@media (max-width: 1024px) {
  #page-pos>div[style*="grid-template-columns"] {
    grid-template-columns: 1fr !important;
    height: auto !important;
    display: flex !important;
    flex-direction: column;
  }

  #pos-product-grid {
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)) !important;
    max-height: 400px;
  }

  #page-pos .card:last-child {
    border-left: none !important;
    border-top: 1px solid var(--border-color);
  }
}

#pos-product-grid {
  scrollbar-width: thin;
}

.pos-product-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: center;
}

.pos-product-card:hover {
  background: var(--bg-glass-hover);
  border-color: var(--accent-blue);
  transform: translateY(-2px);
}

.pos-product-card .img-placeholder {
  width: 100%;
  aspect-ratio: 1;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
}

.pos-product-card .name {
  font-weight: 600;
  font-size: 13px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.pos-product-card .price {
  color: var(--accent-green);
  font-weight: 700;
  font-size: 14px;
}

.pos-product-card .stock {
  font-size: 10px;
  color: var(--text-muted);
}

.pos-cart-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  border-bottom: 1px solid var(--border-color);
  animation: fadeIn 0.2s ease;
}

.pos-cart-item .info {
  flex: 1;
}

.pos-cart-item .name {
  font-size: 12px;
  font-weight: 600;
  display: block;
}

.pos-cart-item .price {
  font-size: 11px;
  color: var(--text-muted);
}

.pos-cart-item .qty-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.pos-cart-item .qty-btn {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  background: var(--bg-glass);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.pos-cart-item .qty-val {
  font-size: 13px;
  font-weight: 600;
  min-width: 20px;
  text-align: center;
}

.pos-cart-item .remove {
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
}

.pos-cart-item .remove:hover {
  color: var(--accent-red);
}