:root {
  --bg-primary: #0b0f19;
  --bg-panel: #161f30;
  --bg-input: #1e293b;
  --border-color: #334155;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent-cyan: #06b6d4;
  --accent-green: #10b981;
  --accent-gold: #f59e0b;
  --font-family: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
}

[data-theme="light"] {
  --bg-primary: #f1f5f9;
  --bg-panel: #ffffff;
  --bg-input: #f8fafc;
  --border-color: #cbd5e1;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --accent-cyan: #0284c7;
  --accent-green: #059669;
  --accent-gold: #d97706;
}

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

html, body {
  max-width: 100vw;
  overflow-x: hidden;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-main);
  min-height: 100vh;
  padding: 1rem;
}

.app-container {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
}

.logo-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  font-size: 1.8rem;
  background: #ffffff;
  border-radius: 12px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.1);
  flex-shrink: 0;
}

.brand-logo-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 12px;
  display: block;
}

.app-header h1 {
  font-size: 1.4rem;
  font-weight: 700;
}

.badge {
  font-size: 0.75rem;
  background: var(--accent-cyan);
  color: #fff;
  padding: 0.15rem 0.5rem;
  border-radius: 99px;
  vertical-align: middle;
}

.subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.icon-btn {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.5rem;
  border-radius: 10px;
  cursor: pointer;
}

/* Layout */
.main-content {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 1.5rem;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  align-items: start;
}

.editor-panel,
.preview-panel {
  min-width: 0;
  max-width: 100%;
  box-sizing: border-box;
}

@media (min-width: 1025px) {
  .preview-panel {
    position: sticky;
    top: 1rem;
    align-self: start;
  }
}

@media (max-width: 1024px) {
  .main-content {
    grid-template-columns: minmax(0, 1fr);
    width: 100%;
    max-width: 100%;
  }
}

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
}

.panel h2 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 1rem;

}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.currency-tag {
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  font-weight: 600;
  font-size: 0.8rem;
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
}

.form-section {
  background: rgba(0, 0, 0, 0.1);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1rem;
  margin-bottom: 1.25rem;
}

.form-section h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 0.75rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

@media (max-width: 500px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }
}

.input-group {
  display: flex;
  flex-col: column;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 0.75rem;
}

.input-group label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

input, select {
  width: 100%;
  padding: 0.65rem 0.85rem;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-main);
  font-family: var(--font-family);
  font-size: 0.9rem;
  outline: none;
}

input:focus, select:focus {
  border-color: var(--accent-cyan);
}

/* Items */
.items-container {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.item-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 30px;
  gap: 0.5rem;
  align-items: center;
}

.delete-item-btn {
  background: transparent;
  border: none;
  color: #ef4444;
  font-size: 1.1rem;
  cursor: pointer;
}

/* Receipt Paper Styling */
.receipt-paper {
  background: #ffffff;
  color: #111827;
  font-family: 'Courier New', Courier, monospace;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  margin-bottom: 1.5rem;
  font-size: 0.85rem;
  line-height: 1.4;
}

.receipt-header {
  text-align: center;
  margin-bottom: 0.5rem;
}

.receipt-header h3 {
  font-size: 1.1rem;
  font-weight: bold;
}

.receipt-divider {
  text-align: center;
  color: #9ca3af;
  margin: 0.5rem 0;
  user-select: none;
}

.receipt-table {
  width: 100%;
  border-collapse: collapse;
}

.receipt-table th, .receipt-table td {
  padding: 0.25rem 0;
  text-align: left;
}

.text-right {
  text-align: right !important;
}

.total-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.2rem;
}

.grand-total {
  font-size: 1.1rem;
  font-weight: bold;
  margin-top: 0.4rem;
  padding-top: 0.4rem;
  border-top: 1px dashed #000;
}

.receipt-footer {
  text-align: center;
  margin-top: 0.75rem;
}

.thank-you {
  font-weight: bold;
}

.powered-by {
  font-size: 0.7rem;
  color: #6b7280;
}

/* Action Buttons */
.actions-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.btn {
  padding: 0.75rem 1.25rem;
  border-radius: 10px;
  border: none;
  font-family: var(--font-family);
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--accent-cyan);
  color: #fff;
}

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

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

.btn-lg {
  font-size: 1rem;
}

/* Floating Update Toast */
.update-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: #0f172a;
  border: 1px solid var(--accent-cyan);
  border-radius: 999px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  z-index: 9999;
  padding: 0.5rem 1rem;
  animation: slideUp 0.3s ease-out;
}

.update-toast-content {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-size: 0.88rem;
  color: #f8fafc;
}

.update-toast button {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  background: var(--accent-cyan);
  color: #ffffff;
}

.update-toast button:hover {
  background: #0284c7;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translate(-50%, 20px);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}

/* Header Actions & Pro Badges */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.badge-pro {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: #ffffff;
  font-weight: 800;
  cursor: pointer;
  border: none;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  box-shadow: 0 2px 6px rgba(245, 158, 11, 0.35);
  transition: transform 0.15s ease;
}

.badge-pro:hover {
  transform: scale(1.05);
}

.badge-pro-tag {
  background: #f59e0b;
  color: #000;
  font-weight: 800;
  font-size: 0.65rem;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  margin-left: 0.35rem;
  vertical-align: middle;
}

/* Logo Upload Row */
.logo-upload-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.25rem;
}

.btn-danger {
  background: #ef4444;
  color: #fff;
  border: none;
}

.prev-logo-box {
  text-align: center;
  margin-bottom: 0.75rem;
}

.prev-logo-box img {
  max-width: 120px;
  max-height: 60px;
  object-fit: contain;
}

/* Modal Backdrop & Card */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(11, 15, 25, 0.82);
  backdrop-filter: blur(6px);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  animation: fadeIn 0.2s ease-out;
}

.modal-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  max-width: 480px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 1.5rem;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  color: var(--text-main);
  animation: modalPop 0.25s ease-out;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.25rem;
}

.pro-title-group {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.pro-crown {
  font-size: 1.6rem;
}

.modal-header h3 {
  font-size: 1.25rem;
  font-weight: 700;
}

.modal-sub {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.modal-close-btn {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  color: var(--text-muted);
  cursor: pointer;
  line-height: 1;
}

.modal-close-btn:hover {
  color: var(--text-main);
}

/* Pro Features Grid */
.pro-features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.pro-feature-item {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  padding: 0.5rem 0.65rem;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 500;
}

/* Pricing Highlight */
.pricing-pill-box {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.12), rgba(6, 182, 212, 0.12));
  border: 1px solid rgba(245, 158, 11, 0.35);
  border-radius: 12px;
  padding: 0.85rem;
  text-align: center;
  margin-bottom: 1.25rem;
}

.price-highlight {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-gold);
}

.price-highlight span {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
}

.price-annual {
  font-size: 0.8rem;
  color: var(--accent-green);
  font-weight: 600;
  margin-top: 2px;
}

/* Payment Tabs */
.pay-tabs {
  display: flex;
  gap: 0.35rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1rem;
}

.pay-tab-btn {
  flex: 1;
  background: transparent;
  border: none;
  padding: 0.5rem 0.25rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
}

.pay-tab-btn.active {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
}

.tab-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.wam-copy-box, .wallet-copy-box {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.85rem;
  font-size: 0.85rem;
}

.wallet-copy-box code {
  font-size: 0.72rem;
  word-break: break-all;
  color: var(--accent-cyan);
}

.btn-block {
  width: 100%;
  display: block;
  text-align: center;
  text-decoration: none;
  box-sizing: border-box;
}

/* Key Activation */
.key-activation-box {
  margin-top: 1.25rem;
  border-top: 1px dashed var(--border-color);
  padding-top: 1rem;
}

.key-activation-box label {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 0.4rem;
}

.key-input-row {
  display: flex;
  gap: 0.5rem;
}

.key-input-row input {
  flex: 1;
  text-transform: uppercase;
  font-weight: bold;
  letter-spacing: 1px;
}

.key-feedback {
  margin-top: 0.5rem;
  font-size: 0.8rem;
  padding: 0.4rem 0.6rem;
  border-radius: 6px;
}

.key-feedback.success {
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
  border: 1px solid #10b981;
}

.key-feedback.error {
  background: rgba(239, 68, 68, 0.15);
  color: #ef4444;
  border: 1px solid #ef4444;
}

/* Admin Keygen Box */
.admin-keygen-box {
  margin-top: 1.25rem;
  padding: 1rem;
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.35);
  border-radius: 12px;
}

.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--accent-gold);
  margin-bottom: 0.35rem;
}

.admin-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.generated-key-display {
  margin-top: 0.75rem;
  background: var(--bg-input);
  border: 1px dashed var(--accent-green);
  border-radius: 8px;
  padding: 0.75rem;
}

.key-output-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.key-output-row strong {
  font-size: 1.05rem;
  letter-spacing: 1px;
  color: var(--accent-green);
  font-family: monospace;
}

/* History Modal */
.history-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.history-card {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 0.85rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.history-meta h4 {
  font-size: 0.95rem;
  font-weight: 600;
}

.history-meta p {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.history-total {
  font-weight: 700;
  color: var(--accent-green);
  font-size: 0.95rem;
  margin-top: 2px;
}

.history-actions {
  display: flex;
  gap: 0.4rem;
}

.pro-upsell-card {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.15), rgba(6, 182, 212, 0.15));
  border: 1px solid rgba(245, 158, 11, 0.4);
  border-radius: 10px;
  padding: 1rem;
  text-align: center;
}

.pro-upsell-card h4 {
  font-size: 0.95rem;
  color: var(--accent-gold);
  margin-bottom: 0.35rem;
}

.pro-upsell-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes modalPop {
  from { opacity: 0; transform: scale(0.94); }
  to { opacity: 1; transform: scale(1); }
}

/* Referral & Share App Card */
.referral-card {
  margin-top: 1.25rem;
  background: var(--bg-panel);
  border: 1px dashed var(--border-color);
  border-radius: 12px;
  padding: 0.9rem 1.1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.referral-content {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.referral-icon {
  font-size: 1.6rem;
}

.referral-content h4 {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
}

.referral-content p {
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-top: 2px;
}

@media (max-width: 600px) {
  .referral-card {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
  }
  .referral-content {
    flex-direction: column;
    text-align: center;
  }
}

/* Quick-Add Catalog Bar */
.section-title-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.header-btns-row {
  display: flex;
  gap: 0.5rem;
}

.catalog-quick-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.85rem;
  background: rgba(30, 41, 59, 0.4);
  border: 1px dashed var(--border-color);
  border-radius: 10px;
  padding: 0.5rem 0.75rem;
  overflow: hidden;
  min-width: 0;
  width: 100%;
}

[data-theme="light"] .catalog-quick-bar {
  background: rgba(241, 245, 249, 0.7);
}

.catalog-quick-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-cyan);
  white-space: nowrap;
  flex-shrink: 0;
}

.catalog-chips-scroll {
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  padding: 2px 0;
  min-width: 0;
  flex: 1;
}

.catalog-chips-scroll::-webkit-scrollbar {
  display: none;
}

.catalog-chip {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.25rem 0.6rem;
  border-radius: 99px;
  font-size: 0.76rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  user-select: none;
}

.catalog-chip:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-1px);
}

.catalog-chip:active {
  transform: scale(0.96);
}

.catalog-chip .chip-price {
  color: var(--accent-green);
  font-weight: 600;
}

.catalog-chip.manage-chip {
  background: rgba(6, 182, 212, 0.1);
  border-color: rgba(6, 182, 212, 0.3);
  color: var(--accent-cyan);
}

/* History Toolbar & Metrics */
.history-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 0;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.history-metrics-summary {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.metric-chip {
  background: rgba(30, 41, 59, 0.6);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
}

[data-theme="light"] .metric-chip {
  background: #f8fafc;
}

.metric-label {
  color: var(--text-muted);
  margin-right: 0.25rem;
}

.metric-chip strong {
  color: var(--accent-green);
}

.export-csv-btn {
  white-space: nowrap;
  flex-shrink: 0;
}

@media (max-width: 600px) {
  .history-toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  .history-metrics-summary {
    justify-content: space-between;
  }
  .export-csv-btn {
    width: 100%;
  }
}

/* Catalog Manager Modal */
.catalog-add-form {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1rem;
  margin-bottom: 1.25rem;
}

.catalog-add-form h4 {
  font-size: 0.88rem;
  margin-bottom: 0.75rem;
  color: var(--text-main);
}

.catalog-list-wrap h4 {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.catalog-list-container {
  max-height: 240px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.catalog-item-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
}

.catalog-item-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.catalog-item-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
}

.catalog-item-cost {
  font-size: 0.78rem;
  color: var(--accent-green);
  font-weight: 600;
}

.catalog-item-actions {
  display: flex;
  gap: 0.4rem;
}

/* ==============================================
   --- Mobile-First Responsiveness & View Tabs ---
   ============================================== */

.mobile-view-tabs {
  display: none;
}

.mobile-only-btn {
  display: none;
}

/* ==========================================================================
   Tablet, Laptop & Mobile Responsive Breakpoint (<= 1024px)
   ========================================================================== */
@media (max-width: 1024px) {
  .mobile-view-tabs {
    display: flex;
    gap: 0.35rem;
    margin-bottom: 1rem;
    background: var(--bg-panel);
    padding: 0.3rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    width: 100%;
    box-sizing: border-box;
  }

  .mobile-tab-btn {
    flex: 1;
    min-width: 0;
    padding: 0.7rem 0.5rem;
    border-radius: 9px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-family: var(--font-family);
    font-weight: 600;
    font-size: 0.84rem;
    cursor: pointer;
    transition: all 0.18s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    user-select: none;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .mobile-tab-btn.active {
    background: var(--accent-cyan);
    color: #ffffff;
    box-shadow: 0 2px 8px rgba(6, 182, 212, 0.35);
  }

  .mobile-only-btn {
    display: flex !important;
    align-items: center;
    justify-content: center;
  }

  /* When on mobile, toggle display based on active tab */
  body.mobile-tab-builder .preview-panel {
    display: none !important;
  }

  body.mobile-tab-preview .editor-panel {
    display: none !important;
  }

  /* --- Receipt Builder Mobile Harmony --- */
  .editor-panel > h2 {
    display: none;
  }

  .editor-panel,
  .preview-panel {
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 0;
    min-width: 0;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
  }

  .form-section {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.15rem 1rem;
    margin-bottom: 0.9rem;
    box-shadow: 0 4px 18px -2px rgba(0, 0, 0, 0.3);
    min-width: 0;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
  }

  [data-theme="light"] .form-section {
    background: #ffffff;
    box-shadow: 0 4px 18px -2px rgba(0, 0, 0, 0.06);
  }

  .form-section h3 {
    font-size: 0.82rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.85px;
    color: var(--accent-cyan);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 0.65rem;
    margin-bottom: 0.85rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  [data-theme="light"] .form-section h3 {
    border-bottom-color: rgba(0, 0, 0, 0.06);
  }

  /* Fluid Single-Column on All Mobile Screens */
  .grid-2 {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  /* Touch-First Inputs & Selects */
  .input-group {
    margin-bottom: 0.75rem;
    gap: 0.35rem;
  }

  .input-group label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-muted);
  }

  input, select {
    min-height: 46px;
    padding: 0.75rem 0.95rem;
    font-size: 0.95rem;
    border-radius: 10px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
  }

  input:focus, select:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.2);
    outline: none;
  }

  /* Mobile POS Item Cards */
  .section-header {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.85rem;
  }

  .header-btns-row {
    display: flex;
    gap: 0.4rem;
  }

  .item-row {
    display: grid;
    grid-template-columns: 1fr 1fr 42px;
    gap: 0.5rem;
    background: rgba(30, 41, 59, 0.45);
    padding: 0.75rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    margin-bottom: 0.65rem;
    align-items: center;
  }

  [data-theme="light"] .item-row {
    background: rgba(241, 245, 249, 0.9);
  }

  .item-row .item-input[data-field="description"] {
    grid-column: 1 / 3;
    font-size: 0.92rem;
    font-weight: 500;
    min-height: 42px;
  }

  .item-row .delete-item-btn {
    grid-column: 3;
    grid-row: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(239, 68, 68, 0.14);
    color: #ef4444;
    border-radius: 8px;
    height: 42px;
    width: 42px;
    font-size: 1.15rem;
    cursor: pointer;
    border: none;
    transition: all 0.15s ease;
  }

  .item-row .delete-item-btn:hover {
    background: rgba(239, 68, 68, 0.25);
  }

  .item-row .item-input[data-field="qty"],
  .item-row .item-input[data-field="price"] {
    min-height: 42px;
  }

  /* Hero Jump to Preview Button */
  #jumpToPreviewBtn {
    margin-top: 1.25rem;
    padding: 1rem 1.25rem;
    font-size: 1rem;
    font-weight: 700;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--accent-cyan), #0284c7);
    color: #ffffff;
    border: none;
    box-shadow: 0 4px 18px rgba(6, 182, 212, 0.4);
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
  }

  #jumpToPreviewBtn:active {
    transform: scale(0.98);
  }
}

/* ==========================================================================
   Smartphone Breakpoint (<= 640px)
   ========================================================================== */
@media (max-width: 640px) {
  body {
    padding: 0.4rem;
  }

  .app-container {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
  }

  .app-header {
    flex-direction: column;
    align-items: stretch;
    gap: 0.65rem;
    padding-bottom: 0.75rem;
    margin-bottom: 0.75rem;
    width: 100%;
    box-sizing: border-box;
  }

  .logo-group {
    width: 100%;
    justify-content: flex-start;
  }

  .app-header h1 {
    font-size: 1.2rem;
  }

  .subtitle {
    font-size: 0.76rem;
  }

  .header-actions {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr)) 38px;
    gap: 0.35rem;
    width: 100%;
    box-sizing: border-box;
  }

  .header-actions .btn,
  .header-actions .badge-pro {
    min-width: 0;
    padding: 0.45rem 0.2rem;
    font-size: 0.72rem;
    justify-content: center;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    border-radius: 8px;
  }

  .header-actions .icon-btn {
    width: 38px;
    height: 32px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    border-radius: 8px;
  }

  .mobile-view-tabs {
    gap: 0.25rem;
    padding: 0.25rem;
    margin-bottom: 0.75rem;
  }

  .mobile-tab-btn {
    padding: 0.6rem 0.25rem;
    font-size: 0.78rem;
    border-radius: 8px;
  }

  .form-section {
    padding: 0.95rem 0.75rem;
    border-radius: 14px;
    margin-bottom: 0.75rem;
  }

  .form-section h3 {
    font-size: 0.78rem;
    padding-bottom: 0.5rem;
    margin-bottom: 0.75rem;
  }

  .receipt-paper {
    padding: 1rem 0.75rem;
    font-size: 0.8rem;
    border-radius: 12px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
  }

  .history-metrics-summary {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 0.35rem;
    width: 100%;
  }

  .metric-chip {
    text-align: center;
    padding: 0.35rem 0.25rem;
    font-size: 0.72rem;
  }

  #exportCsvBtn {
    width: 100%;
    justify-content: center;
  }

  .modal-card {
    padding: 1.15rem 0.9rem;
    max-width: 96vw;
    border-radius: 14px;
  }

  .pro-features-grid {
    grid-template-columns: 1fr;
  }
}

/* App Footer & Support Inquiries */
.app-site-footer {
  text-align: center;
  padding: 1.25rem 0.5rem 0.75rem;
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted, #64748b);
  border-top: 1px dashed var(--border-color, #e2e8f0);
}

.app-site-footer a {
  color: var(--primary, #2563eb);
  text-decoration: none;
  font-weight: 500;
}

.app-site-footer a:hover {
  text-decoration: underline;
}

.pro-modal-support {
  text-align: center;
  margin-top: 1rem;
  padding: 0.75rem 0.5rem 0.25rem;
  font-size: 0.78rem;
  color: var(--text-muted, #64748b);
  border-top: 1px solid var(--border-color, #e2e8f0);
}

.pro-modal-support a {
  color: var(--primary, #2563eb);
  text-decoration: none;
  font-weight: 500;
}

.pro-modal-support a:hover {
  text-decoration: underline;
}

.custom-tax-wrap input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border-color, #cbd5e1);
  font-size: 0.9rem;
  background: var(--bg-card, #fff);
  color: var(--text-main, #0f172a);
  box-sizing: border-box;
}

/* End of Day (EOD) Sales Read-out & Till Balance Modal */
.eod-date-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  background: var(--bg-input, rgba(15, 23, 42, 0.6));
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 0.75rem 1rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.eod-date-picker-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.eod-date-picker-wrap input[type="date"] {
  padding: 0.4rem 0.65rem;
  border-radius: 8px;
  font-size: 0.85rem;
  border: 1px solid var(--border-color);
  background: var(--bg-panel);
  color: var(--text-main);
}

.eod-quick-dates {
  display: flex;
  gap: 0.4rem;
}

.eod-quick-dates button.active {
  background: var(--accent-cyan, #0ea5e9);
  color: #fff;
  border-color: transparent;
}

.eod-metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.65rem;
  margin-bottom: 1.25rem;
}

.eod-metric-card {
  background: var(--bg-input, rgba(30, 41, 59, 0.5));
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 0.85rem 0.65rem;
  text-align: center;
}

.eod-metric-card.highlight {
  background: rgba(16, 185, 129, 0.12);
  border-color: rgba(16, 185, 129, 0.35);
}

.eod-metric-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.eod-metric-val {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
}

.eod-metric-card.highlight .eod-metric-val {
  color: #10b981;
}

.eod-breakdown-section {
  background: var(--bg-input, rgba(15, 23, 42, 0.6));
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1rem;
}

.eod-breakdown-section h4 {
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 0.85rem;
  color: var(--text-main);
}

.eod-rails-grid {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.eod-rail-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.55rem 0.75rem;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 0.85rem;
}

.eod-rail-name {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
}

.eod-rail-stats {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.eod-rail-count {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.eod-rail-amount {
  font-weight: 700;
  color: var(--text-main);
}

.eod-blurred {
  filter: blur(4px);
  user-select: none;
  opacity: 0.6;
}

@media (max-width: 640px) {
  .eod-metrics-grid {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
}