/* ═══════════════════════════════════════════════════════
   TGS INVOICE MAKER – DESIGN SYSTEM
   Academic Prestige Palette: Deep Burgundy, Crimson, Warm Gold
   ═══════════════════════════════════════════════════════ */

:root {
  --navy: #4a0329;          /* Deep Burgundy / Plum */
  --navy-dark: #2b0017;
  --maroon: #85063c;        /* Vibrant Crimson / Maroon */
  --maroon-light: #a2003c;
  --gold: #DCA146;          /* Warm Accent Gold */
  --gold-dark: #b47c2d;
  --bg-body: #f4f6f9;       /* Light neutral workspace background */
  --bg-card: #ffffff;
  --border: #e2e8f0;
  --border-maroon: #f3d7e2;
  --text-primary: #1e293b;
  --text-muted: #64748b;
  --text-light: #ffffff;
  --success: #16a34a;
  --success-bg: #f0fdf4;
  --warning: #ea580c;
  --warning-bg: #fff7ed;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --info: #0284c7;
  --info-bg: #f0f9ff;
  
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(74, 3, 41, 0.08);
  --shadow-lg: 0 12px 28px rgba(74, 3, 41, 0.12);
  --transition: 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

html {
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
  text-decoration: none;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* ════════ TOP APP NAVBAR ════════ */
.app-header {
  background: #ffffff;
  border-bottom: 2px solid var(--gold);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}

.header-container {
  max-width: 1720px;
  margin: 0 auto;
  padding: 10px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-logo-wrap {
  width: 44px;
  height: 44px;
  background: #ffffff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  padding: 4px;
}

.brand-logo-wrap img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.brand-logo-divider {
  width: 1px;
  height: 28px;
  background: var(--border);
  margin: 0 2px;
}

.brand-text h1 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--navy);
  line-height: 1.2;
}

.brand-text span {
  font-size: 0.72rem;
  color: var(--maroon);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* Nav Tabs */
.app-nav {
  display: flex;
  gap: 8px;
}

.nav-tab {
  background: transparent;
  border: none;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.88rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

.nav-tab:hover {
  background: #f1f5f9;
  color: var(--navy);
}

.nav-tab.active {
  background: var(--navy);
  color: #ffffff;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* User Profile Badge */
.user-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 20px;
  background: #f8fafc;
  border: 1px solid var(--border);
  font-size: 0.8rem;
}

.user-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
}

.user-status-dot.offline {
  background: #94a3b8;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--maroon);
  color: #ffffff;
}
.btn-primary:hover {
  background: var(--maroon-light);
  transform: translateY(-1px);
}

.btn-navy {
  background: var(--navy);
  color: #ffffff;
}
.btn-navy:hover {
  background: var(--navy-dark);
}

.btn-gold {
  background: var(--gold);
  color: var(--navy);
  font-weight: 700;
}
.btn-gold:hover {
  background: var(--gold-dark);
  color: #ffffff;
}

.btn-outline {
  background: transparent;
  border-color: var(--border);
  color: var(--text-primary);
}
.btn-outline:hover {
  background: #f8fafc;
  border-color: var(--navy);
  color: var(--navy);
}

.btn-danger {
  background: var(--danger-bg);
  border-color: #fca5a5;
  color: var(--danger);
}
.btn-danger:hover {
  background: var(--danger);
  color: #ffffff;
}

.btn-sm {
  padding: 4px 10px;
  font-size: 0.78rem;
}

/* ════════ MAIN WORKSPACE ════════ */
.main-workspace {
  flex: 1;
  max-width: 1720px;
  width: 100%;
  margin: 0 auto;
  padding: 20px;
}

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

/* ════════ 1. EDITOR & PREVIEW SPLIT LAYOUT ════════ */
.editor-layout {
  display: grid;
  grid-template-columns: minmax(460px, 1fr) minmax(540px, 1.15fr);
  gap: 24px;
  align-items: start;
}

@media (max-width: 1180px) {
  .editor-layout {
    grid-template-columns: 1fr;
  }
}

/* Left Form Pane */
.form-pane {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.panel-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.panel-card-header {
  background: #fbfcfe;
  padding: 12px 18px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.panel-card-header h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--navy);
  display: flex;
  align-items: center;
  gap: 10px;
}

.panel-card-body {
  padding: 18px;
}

/* Form Controls */
.form-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.form-grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(135px, 1fr));
  gap: 12px;
}

.form-grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 10px;
}

/* Ensure no child overflows its grid cell under Windows display scaling */
.form-grid-2 > *,
.form-grid-3 > *,
.form-grid-4 > *,
.form-group {
  min-width: 0;
}

@media (max-width: 520px) {
  .form-grid-2 {
    grid-template-columns: 1fr;
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.form-group label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--navy);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.form-control {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 10px;
  font-size: 0.85rem;
  color: var(--text-primary);
  background: #ffffff;
  transition: var(--transition);
  width: 100%;
  max-width: 100%;
  min-width: 0;
  box-sizing: border-box;
}

select.form-control {
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
  cursor: pointer;
}

.form-control:focus {
  outline: none;
  border-color: var(--maroon);
  box-shadow: 0 0 0 3px rgba(133, 6, 60, 0.12);
}

textarea.form-control {
  resize: vertical;
  min-height: 60px;
}

/* Segmented Toggle Control */
.segmented-control {
  display: flex;
  background: #f1f5f9;
  border-radius: var(--radius-sm);
  padding: 3px;
  gap: 2px;
}

.segmented-btn {
  flex: 1;
  text-align: center;
  padding: 6px 10px;
  font-size: 0.8rem;
  font-weight: 600;
  border: none;
  background: transparent;
  border-radius: 4px;
  cursor: pointer;
  color: var(--text-muted);
  transition: var(--transition);
}

.segmented-btn.active {
  background: #ffffff;
  color: var(--navy);
  box-shadow: var(--shadow-sm);
}

/* Switch Toggle */
.switch-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
}

.switch-input {
  position: relative;
  width: 38px;
  height: 20px;
  appearance: none;
  background: #cbd5e1;
  border-radius: 20px;
  cursor: pointer;
  outline: none;
  transition: 0.3s;
}

.switch-input:checked {
  background: var(--maroon);
}

.switch-input::before {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  top: 2px;
  left: 2px;
  background: #ffffff;
  transition: 0.3s;
}

.switch-input:checked::before {
  left: 20px;
}

/* Dynamic Line Items Editor */
.items-table-wrap {
  overflow-x: auto;
  margin-top: 10px;
}

.item-row-card {
  background: #fbfcfe;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
  margin-bottom: 12px;
  position: relative;
}

.item-row-card:hover {
  border-color: var(--border-maroon);
}

.item-row-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.item-row-num {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--maroon);
}

.sac-badge {
  background: #e0f2fe;
  color: #0369a1;
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 600;
}

/* Allowed SAC Quick Picker */
.sac-quick-pills {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.sac-pill {
  font-size: 0.72rem;
  background: #f1f5f9;
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 12px;
  cursor: pointer;
  transition: var(--transition);
}

.sac-pill:hover, .sac-pill.selected {
  background: var(--navy);
  color: #ffffff;
  border-color: var(--navy);
}

/* ════════ RIGHT PREVIEW PANE ════════ */
.preview-pane {
  position: sticky;
  top: 76px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.preview-toolbar {
  background: #ffffff;
  padding: 10px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  box-shadow: var(--shadow-sm);
}

.preview-zoom-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

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

/* Paper Container */
.paper-wrapper {
  background: #94a3b833;
  padding: 20px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  display: flex;
  justify-content: center;
}

/* ════════ REALISTIC A4 INVOICE SHEET ════════ */
.invoice-sheet {
  width: 210mm;
  min-height: 297mm;
  background: #ffffff;
  padding: 10mm; /* Exactly 10mm on all 4 sides */
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
  color: #1e293b;
  position: relative;
  box-sizing: border-box;
  font-size: 9.5pt;
  line-height: 1.4;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

/* Exact A4 PDF Export overrides: 190mm printable width + auto height to fit on 1 page */
.invoice-sheet.pdf-export-mode {
  width: 190mm !important;
  min-height: 0 !important;
  height: auto !important;
  padding: 0 !important;
  margin: 0 !important;
  box-shadow: none !important;
  background: #ffffff !important;
}

.invoice-sheet.pdf-export-mode .sheet-footer {
  margin-top: 18px !important;
}

/* Page break rules for clean multi-page invoice handling */
.sheet-header,
.sheet-meta-grid,
.sheet-parties-grid,
.sheet-table tr,
.sheet-bottom-grid,
.sheet-footer,
.party-box {
  page-break-inside: avoid !important;
  break-inside: avoid !important;
}

/* 1. Sheet Header */
.sheet-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 10px;
}

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

.sheet-logo {
  width: 68px;
  height: 68px;
  object-fit: contain;
}

.sheet-title-group {
  text-align: right;
}

.sheet-tax-title {
  font-family: var(--font-heading);
  font-size: 20pt;
  font-weight: 900;
  color: var(--navy);
  letter-spacing: 0.02em;
  line-height: 1.1;
}

.sheet-company-title {
  font-family: var(--font-heading);
  font-size: 11pt;
  font-weight: 800;
  color: var(--maroon);
  letter-spacing: 0.03em;
  margin-top: 4px;
}

.sheet-company-subtitle {
  font-size: 7.5pt;
  color: var(--text-muted);
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* 2. Meta Strip */
.sheet-meta-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr 1.2fr 0.9fr;
  border-top: 1px solid #e2e8f0;
  border-bottom: 1px solid #e2e8f0;
  padding: 6px 0;
  margin-bottom: 10px;
  gap: 10px;
}

.meta-col {
  display: flex;
  flex-direction: column;
}

.meta-label {
  font-size: 7pt;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 2px;
}

.meta-val {
  font-size: 9.5pt;
  font-weight: 700;
  color: var(--navy);
}

.meta-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 8.5pt;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.status-paid-text { color: #16a34a; }
.status-unpaid-text { color: #dc2626; }
.status-partial-text { color: #ea580c; }

/* 3. Billed By vs Billed To Two Boxes */
.sheet-parties-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 10px;
}

.party-box {
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  background: #ffffff;
  font-size: 8.5pt;
  line-height: 1.4;
}

.party-box-title {
  font-size: 7pt;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--maroon);
  border-bottom: 1px solid #f1f5f9;
  padding-bottom: 4px;
  margin-bottom: 6px;
}

.party-name {
  font-weight: 800;
  color: var(--navy);
  font-size: 10pt;
  margin-bottom: 2px;
}

.party-meta {
  color: #475569;
}

.party-gstin {
  margin-top: 4px;
  font-weight: 700;
  color: var(--text-primary);
}

/* 4. Table of Items */
.sheet-table-wrap {
  margin-bottom: 10px;
}

.sheet-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 8.5pt;
}

.sheet-table th {
  background: var(--navy);
  color: #ffffff;
  text-align: left;
  padding: 6px 7px;
  font-weight: 700;
  font-size: 7.5pt;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-top: 1px solid var(--navy);
  border-bottom: 1px solid var(--navy);
}

.sheet-table th.text-right, .sheet-table td.text-right {
  text-align: right;
}
.sheet-table th.text-center, .sheet-table td.text-center {
  text-align: center;
}

.sheet-table td {
  padding: 6px 7px;
  border-bottom: 1px solid #f1f5f9;
  vertical-align: top;
}

.sheet-table tr:nth-child(even) td {
  background-color: #fafbfc;
}

.sheet-table .item-desc-title {
  font-weight: 600;
  color: var(--navy);
}

.sheet-table .item-sac-tag {
  font-size: 7.5pt;
  color: var(--text-muted);
  display: block;
  margin-top: 2px;
}

/* 5. Summary & Bottom Blocks */
.sheet-bottom-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 14px;
  margin-top: 6px;
  margin-bottom: 10px;
}

/* Left: Words, Stamp, Bank */
.sheet-bottom-left {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.amount-words-box {
  border-left: 3px solid var(--gold);
  padding: 6px 10px;
  background: #fdfbf7;
  font-size: 8.5pt;
  line-height: 1.35;
}

.amount-words-title {
  font-size: 7pt;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  margin-bottom: 2px;
}

.amount-words-val {
  font-weight: 700;
  color: var(--navy);
  font-style: italic;
}

/* PAID Stamp */
.stamp-container {
  margin: 6px 0;
}

.rubber-stamp {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 6px 14px;
  border: 2.5px solid #16a34a;
  border-radius: 8px;
  color: #16a34a;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  line-height: 1.2;
  transform: rotate(-3deg);
  opacity: 0.92;
  user-select: none;
}

.rubber-stamp.stamp-unpaid {
  border-color: #dc2626;
  color: #dc2626;
}

.rubber-stamp.stamp-partial {
  border-color: #ea580c;
  color: #ea580c;
}

.stamp-main-word {
  font-size: 13pt;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.stamp-company {
  font-size: 6.5pt;
  font-weight: 800;
  margin-top: 2px;
}

.stamp-date {
  font-size: 7.5pt;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-top: 2px;
}

/* Bank Box */
.sheet-bank-box {
  border: 1px dashed #cbd5e1;
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  background: #f8fafc;
  font-size: 8pt;
  line-height: 1.4;
}

.sheet-bank-title {
  font-size: 7pt;
  font-weight: 800;
  color: var(--maroon);
  text-transform: uppercase;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 5px;
}

/* Right: Calculation Table */
.sheet-calc-box {
  border-top: 1px solid #e2e8f0;
  padding-top: 6px;
}

.calc-row {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
  font-size: 8.5pt;
  color: #475569;
}

.calc-row.grand-total-row {
  border-top: 2px solid var(--navy);
  border-bottom: 1px solid var(--navy);
  padding: 8px 0;
  margin-top: 6px;
  font-size: 11pt;
  font-weight: 900;
  color: var(--navy);
}

.calc-row.balance-row {
  background: #fff7ed;
  border: 1px solid #fed7aa;
  padding: 6px 8px;
  border-radius: 4px;
  margin-top: 6px;
  font-weight: 800;
  color: #c2410c;
}

/* 6. Terms & Signature Notice */
.sheet-footer {
  border-top: 1.5px solid #cbd5e1;
  padding-top: 10px;
  margin-top: auto;
}

.sheet-terms-title {
  font-size: 7.5pt;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--navy);
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.sheet-terms-list {
  font-size: 7.5pt;
  color: #334155;
  padding-left: 18px;
  line-height: 1.45;
  margin-bottom: 8px;
}

.sheet-terms-list li {
  margin-bottom: 2px;
}

.sheet-disclaimer {
  text-align: center;
  font-size: 7pt;
  color: #64748b;
  font-style: italic;
  padding-top: 4px;
  border-top: 1px dashed #e2e8f0;
}

/* ════════ 2. SAVED INVOICES & REPORTS TAB ════════ */
.reports-layout {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.stat-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: 14px;
}

.stat-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.stat-val {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--navy);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
}

.filters-bar {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

/* Data Table */
.data-table-wrap {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow-x: auto;
  box-shadow: var(--shadow-sm);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
  text-align: left;
}

.data-table th {
  background: #f8fafc;
  padding: 12px 14px;
  font-weight: 700;
  color: var(--navy);
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid #f1f5f9;
}

.data-table tr:hover td {
  background-color: #fdfbf7;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.status-pill.paid { background: #dcfce7; color: #15803d; }
.status-pill.unpaid { background: #fee2e2; color: #b91c1c; }
.status-pill.partial { background: #ffedd5; color: #c2410c; }

/* ════════ 3. SETTINGS TAB ════════ */
.settings-container {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ════════ STRICT LOGIN BARRIER SCREEN ════════ */
.strict-login-screen {
  position: fixed;
  inset: 0;
  z-index: 99999;
  background: radial-gradient(circle at 50% 18%, #1e293b 0%, #0a0e17 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  overflow-y: auto;
  animation: fadeInScreen 0.25s ease-out;
}

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

.strict-login-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 480px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(217, 119, 6, 0.25);
  padding: 32px 28px;
  margin: auto;
  animation: cardPopIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

@keyframes cardPopIn {
  from { transform: scale(0.94) translateY(10px); opacity: 0; }
  to { transform: scale(1) translateY(0); opacity: 1; }
}

.strict-brand-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 16px;
}

.strict-logo-box {
  width: 64px;
  height: 64px;
  background: #ffffff;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--border);
  padding: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s;
}

.strict-logo-box:hover {
  transform: translateY(-2px);
}

.strict-logo-box img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.strict-logo-divider {
  font-size: 0.95rem;
  font-weight: 900;
  color: var(--gold);
}

.strict-brand-title {
  text-align: center;
  margin-bottom: 20px;
}

.strict-brand-title h2 {
  font-family: var(--font-heading);
  font-size: 1.32rem;
  font-weight: 800;
  color: var(--navy);
  letter-spacing: -0.01em;
  margin-bottom: 4px;
  line-height: 1.25;
}

.strict-brand-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.strict-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #fef3c7;
  color: #92400e;
  border: 1px solid #fde68a;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* Quick Account Pills */
.strict-accounts-section {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  margin-bottom: 16px;
}

.strict-accounts-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--navy);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 8px;
}

.strict-account-pills {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.strict-account-pill {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  cursor: pointer;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 2px;
  transition: all 0.18s ease;
}

.strict-account-pill:hover,
.strict-account-pill.selected {
  border-color: var(--maroon);
  background: #fdfbf7;
  box-shadow: 0 2px 8px rgba(139, 21, 56, 0.12);
  transform: translateY(-1px);
}

.pill-role {
  font-size: 0.65rem;
  font-weight: 800;
  color: var(--maroon);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  gap: 4px;
}

.pill-email {
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--navy);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Error Alert Box */
.strict-alert-error {
  padding: 10px 14px;
  background: #fee2e2;
  border: 1px solid #fca5a5;
  border-radius: var(--radius-sm);
  color: #991b1b;
  font-size: 0.8rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  animation: shakeAlert 0.3s ease-in-out;
}

@keyframes shakeAlert {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

/* Form Styles */
.strict-form-group {
  margin-bottom: 14px;
  text-align: left;
}

.strict-form-group label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 6px;
}

.input-icon-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon-wrap .input-icon {
  position: absolute;
  left: 12px;
  color: var(--text-muted);
  font-size: 0.85rem;
  pointer-events: none;
}

.strict-input {
  width: 100%;
  padding: 10px 38px 10px 36px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  background: #ffffff;
}

.strict-input:focus {
  border-color: var(--maroon);
  box-shadow: 0 0 0 3px rgba(139, 21, 56, 0.12);
}

.btn-toggle-pwd {
  position: absolute;
  right: 10px;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  padding: 4px 6px;
  font-size: 0.88rem;
  border-radius: var(--radius-sm);
}

.btn-toggle-pwd:hover {
  color: var(--navy);
}

.strict-submit-btn {
  width: 100%;
  padding: 12px 16px;
  background: linear-gradient(135deg, var(--navy) 0%, #0f172a 100%);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.25);
  transition: all 0.2s ease;
  margin-top: 6px;
}

.strict-submit-btn:hover {
  background: linear-gradient(135deg, #1e293b 0%, #020617 100%);
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.35);
  transform: translateY(-1px);
}

.strict-submit-btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
}

.strict-card-footer {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.strict-security-tag {
  font-size: 0.72rem;
  font-weight: 700;
  color: #059669;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 4px;
}

.strict-security-note {
  font-size: 0.68rem;
  color: var(--text-muted);
  line-height: 1.4;
  margin: 0;
}

@media (max-width: 576px) {
  .strict-login-card {
    padding: 24px 18px;
  }

  .strict-account-pills {
    grid-template-columns: 1fr;
  }
}

/* ════════ MODALS ════════ */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 16px;
  backdrop-filter: blur(4px);
}

.modal-backdrop.active {
  display: flex;
}

.modal-box {
  background: #ffffff;
  border-radius: var(--radius-md);
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: modalIn 0.2s ease-out;
}

@keyframes modalIn {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

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

.modal-header h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--navy);
}

.modal-close-btn {
  background: transparent;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--text-muted);
}

.modal-body {
  padding: 20px;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 300;
}

.toast {
  background: #1e293b;
  color: #ffffff;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideUp 0.25s ease-out;
}

@keyframes slideUp {
  from { transform: translateY(12px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.toast.success { background: #15803d; }
.toast.error { background: #b91c1c; }

/* ════════ FOOTER ════════ */
.app-footer {
  background: #ffffff;
  border-top: 1px solid var(--border);
  padding: 14px 20px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: auto;
}

.app-footer a {
  color: var(--navy);
  font-weight: 700;
  text-decoration: underline;
}

.app-footer a:hover {
  color: var(--maroon);
}

.status-pill.archived {
  background: #f1f5f9;
  color: #64748b;
  border: 1px solid #cbd5e1;
}

#inv-number-status.available {
  color: var(--success);
}

#inv-number-status.duplicate {
  color: var(--danger);
}

/* ════════ MOBILE RESPONSIVE & ON-DEMAND PREVIEW SCREEN ════════ */

/* Mobile button visibility toggle */
.mobile-only-btn {
  display: none !important;
}

.mobile-bottom-bar {
  display: none;
}

@media (max-width: 1024px) {
  .mobile-only-btn {
    display: inline-flex !important;
  }

  .editor-layout {
    grid-template-columns: 1fr !important;
    gap: 16px;
  }

  .form-pane {
    padding-bottom: 85px; /* Room for fixed bottom floating bar */
  }

  /* Hide the large live preview sheet from the normal page flow on mobile/tablet */
  .preview-pane {
    display: none;
  }

  /* When On-Demand Preview is triggered on mobile, it expands into a full-screen dedicated view */
  .preview-pane.mobile-active {
    display: flex !important;
    position: fixed !important;
    inset: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    height: 100dvh !important;
    z-index: 9999 !important;
    background: rgba(15, 23, 42, 0.92) !important;
    backdrop-filter: blur(10px) !important;
    -webkit-backdrop-filter: blur(10px) !important;
    flex-direction: column !important;
    margin: 0 !important;
    padding: 0 !important;
    overflow: hidden !important;
    animation: mobilePreviewSlideUp 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  }

  body.mobile-preview-open {
    overflow: hidden !important;
    touch-action: none;
  }

  .preview-pane.mobile-active .preview-toolbar {
    border-radius: 0;
    border: none;
    border-bottom: 1px solid var(--border);
    background: #ffffff;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.14);
    z-index: 10;
    padding: 10px 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    flex-wrap: nowrap;
  }

  .preview-pane.mobile-active .preview-toolbar-left {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
  }

  .preview-pane.mobile-active .preview-zoom-label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--navy);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .preview-pane.mobile-active .preview-actions {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
  }

  .preview-pane.mobile-active .paper-wrapper {
    flex: 1;
    overflow-y: auto;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding: 16px 8px 36px 8px;
    background: transparent;
    display: flex;
    justify-content: center;
    align-items: flex-start;
  }

  .preview-pane.mobile-active .invoice-sheet {
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
    transition: transform 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  }

  /* Sticky Mobile Floating Action Bar */
  .mobile-bottom-bar {
    display: flex !important;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-top: 1px solid var(--border);
    box-shadow: 0 -4px 18px rgba(0, 0, 0, 0.08);
    padding: 10px 16px;
    padding-bottom: calc(10px + env(safe-area-inset-bottom, 0px));
    z-index: 850;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
  }

  .mobile-bottom-summary {
    display: flex;
    flex-direction: column;
    min-width: 0;
  }

  .mobile-bar-label {
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
  }

  .mobile-bar-amount {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--navy);
    line-height: 1.2;
    white-space: nowrap;
  }

  .mobile-bar-actions {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-shrink: 0;
  }
}

@keyframes mobilePreviewSlideUp {
  from {
    opacity: 0;
    transform: translateY(24px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Screen widths <= 768px: Header, Navigation & Workspace Optimization */
@media (max-width: 768px) {
  .header-container {
    padding: 8px 12px;
    gap: 8px;
  }

  .brand-logo-wrap {
    width: 36px;
    height: 36px;
  }

  .brand-text h1 {
    font-size: 1.05rem;
  }

  .brand-text span {
    font-size: 0.64rem;
  }

  .header-actions {
    gap: 6px;
  }

  .user-badge {
    padding: 4px 8px;
    font-size: 0.72rem;
  }

  .app-nav {
    width: 100%;
    order: 3;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    display: flex;
    gap: 6px;
    padding-bottom: 2px;
    margin-top: 4px;
    scrollbar-width: none;
  }

  .app-nav::-webkit-scrollbar {
    display: none;
  }

  .nav-tab {
    white-space: nowrap;
    flex-shrink: 0;
    padding: 7px 12px;
    font-size: 0.8rem;
  }

  .main-workspace {
    padding: 12px 10px;
  }

  .panel-card-body {
    padding: 14px 12px;
  }

  .filters-bar {
    padding: 12px;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .filter-group {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
  }

  #report-range-group {
    display: flex;
    flex-direction: column;
    width: 100%;
  }
}

/* Screen widths <= 540px: Form Inputs & Item Cards */
@media (max-width: 540px) {
  .form-grid-2,
  .form-grid-3,
  .form-grid-4 {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .stat-card {
    padding: 10px;
    gap: 8px;
  }

  .stat-icon {
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }

  .stat-val {
    font-size: 1.1rem;
  }

  .stat-label {
    font-size: 0.65rem;
  }

  .form-control {
    font-size: 16px; /* Prevents auto-zoom in iOS Safari */
    min-height: 42px;
  }

  .item-row-card {
    padding: 12px 10px;
  }

  .sac-pill {
    padding: 4px 8px;
    font-size: 0.72rem;
  }

  .segmented-control {
    width: 100%;
  }

  .segmented-btn {
    padding: 8px 4px;
    font-size: 0.72rem;
  }
}

/* ════════ PRINT MEDIA QUERY ════════ */
@media print {
  body {
    background: #ffffff !important;
    color: #000000 !important;
    padding: 0 !important;
    margin: 0 !important;
  }

  .app-header,
  .form-pane,
  .preview-toolbar,
  .mobile-bottom-bar,
  .no-print,
  .modal-backdrop,
  .toast-container {
    display: none !important;
  }

  .main-workspace {
    padding: 0 !important;
    margin: 0 !important;
    max-width: 100% !important;
  }

  .editor-layout {
    display: block !important;
  }

  .preview-pane {
    display: block !important;
    position: static !important;
    width: auto !important;
    height: auto !important;
    background: transparent !important;
  }

  .paper-wrapper {
    background: transparent !important;
    padding: 0 !important;
    box-shadow: none !important;
    overflow: visible !important;
  }

  .invoice-sheet {
    box-shadow: none !important;
    width: 100% !important;
    min-height: auto !important;
    padding: 0 !important;
    transform: none !important;
    page-break-inside: avoid;
    -webkit-print-color-adjust: exact !important;
    print-color-adjust: exact !important;
  }

  @page {
    size: A4 portrait;
    margin: 10mm;
  }
}