/**
 * DocuTrack Enterprise - Master Stylesheet
 * Enterprise Grade CSS Design System: Slate & Indigo Palette, Glassmorphism, Dual-Pane Layout.
 */

:root {
  --primary-50: #EEF2FF;
  --primary-100: #E0E7FF;
  --primary-500: #6366F1;
  --primary-600: #4F46E5;
  --primary-700: #4338CA;
  --primary-900: #312E81;

  --navy-900: #0F172A;
  --navy-800: #1E293B;
  --navy-700: #334155;
  --slate-600: #475569;
  --slate-500: #64748B;
  --slate-400: #94A3B8;
  --slate-200: #E2E8F0;
  --slate-100: #F1F5F9;
  --slate-50: #F8FAFC;

  --emerald-500: #10B981;
  --emerald-600: #059669;
  --amber-500: #F59E0B;
  --amber-600: #D97706;
  --rose-500: #EF4444;
  --purple-500: #8B5CF6;
  --cyan-500: #06B6D4;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;
}

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

body {
  font-family: var(--font-sans);
  background-color: #F8FAFC;
  color: var(--navy-800);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* ==========================================================
   TOP NAVIGATION
   ========================================================== */
.top-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 24px;
  background: rgba(15, 23, 42, 0.96);
  backdrop-filter: blur(12px);
  color: #FFFFFF;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav-left, .nav-right, .nav-center {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-icon {
  position: relative;
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #4F46E5, #06B6D4);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  box-shadow: 0 0 16px rgba(99, 102, 241, 0.4);
}

.live-pulse {
  position: absolute;
  top: -2px;
  right: -2px;
  width: 9px;
  height: 9px;
  background-color: var(--emerald-500);
  border-radius: 50%;
  border: 2px solid var(--navy-900);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.3px;
  color: #FFFFFF;
}

.brand-badge {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.8px;
  color: #818CF8;
}

.tenant-selector {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-left: 12px;
  border-left: 1px solid rgba(255, 255, 255, 0.12);
}

.tenant-label {
  font-size: 12px;
  color: var(--slate-400);
  font-weight: 500;
}

.form-select-sm {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-sm);
  color: #F8FAFC;
  padding: 5px 10px;
  font-size: 12px;
  outline: none;
  cursor: pointer;
}

.form-select-sm option {
  background: var(--navy-900);
  color: #FFFFFF;
}

/* Global Search Bar */
.global-search-bar {
  position: relative;
  width: 440px;
}

.global-search-bar input {
  width: 100%;
  height: 38px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 20px;
  padding: 0 44px 0 38px;
  color: #FFFFFF;
  font-size: 13px;
  transition: all 0.2s ease;
  outline: none;
}

.global-search-bar input:focus {
  background: rgba(255, 255, 255, 0.14);
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.25);
}

.global-search-bar input::placeholder {
  color: var(--slate-400);
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 11px;
  color: var(--slate-400);
}

.search-shortcut {
  position: absolute;
  right: 12px;
  top: 9px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 10px;
  color: var(--slate-400);
  font-family: var(--font-mono);
}

/* Role Switcher in Nav */
.role-switcher-group {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.06);
  padding: 4px 10px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.role-label {
  font-size: 11px;
  font-weight: 600;
  color: #A5B4FC;
}

.role-select {
  background: transparent;
  border: none;
  color: #FFFFFF;
  font-size: 12px;
  font-weight: 600;
  outline: none;
  cursor: pointer;
}

.role-select option {
  background: var(--navy-900);
  color: #FFFFFF;
}

.system-status-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
  color: #34D399;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.status-dot.green { background-color: var(--emerald-500); }
.status-dot.amber { background-color: var(--amber-500); }
.status-dot.rose { background-color: var(--rose-500); }

.user-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3B82F6, #8B5CF6);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
}

.user-info-text {
  display: flex;
  flex-direction: column;
}

.user-name {
  font-size: 12px;
  font-weight: 600;
  color: #FFFFFF;
}

.user-role-title {
  font-size: 10px;
  color: var(--slate-400);
}

/* ==========================================================
   APP LAYOUT & SIDEBAR
   ========================================================== */
.app-layout {
  display: flex;
  min-height: calc(100vh - 64px);
}

.sidebar {
  width: 250px;
  background: #FFFFFF;
  border-right: 1px solid var(--slate-200);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  flex-shrink: 0;
}

.sidebar-nav {
  padding: 20px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-section-title {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.8px;
  color: var(--slate-400);
  padding: 16px 12px 6px 12px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 12px;
  border-radius: var(--radius-md);
  color: var(--navy-700);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.15s ease;
  position: relative;
}

.nav-link:hover {
  background: var(--slate-100);
  color: var(--navy-900);
}

.nav-link.active {
  background: var(--primary-50);
  color: var(--primary-700);
  font-weight: 600;
}

.nav-link.active svg {
  color: var(--primary-600);
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--slate-200);
}

.physical-storage-card {
  background: var(--slate-50);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  padding: 12px;
}

.storage-title {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  font-weight: 700;
  color: var(--slate-500);
  margin-bottom: 8px;
}

.progress-bar-bg {
  width: 100%;
  height: 6px;
  background: var(--slate-200);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 8px;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-500), var(--cyan-500));
}

.storage-loc-info {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: var(--slate-600);
}

/* ==========================================================
   MAIN CONTENT AREA & TABS
   ========================================================== */
.main-content {
  flex: 1;
  padding: 28px 36px;
  overflow-y: auto;
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
  animation: fadeIn 0.2s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.page-title {
  font-size: 22px;
  font-weight: 800;
  color: var(--navy-900);
  letter-spacing: -0.4px;
}

.page-subtitle {
  font-size: 13px;
  color: var(--slate-500);
  margin-top: 2px;
}

.page-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ==========================================================
   BUTTONS & BADGES
   ========================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  border: 1px solid transparent;
  outline: none;
}

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

.btn-lg {
  padding: 12px 24px;
  font-size: 14px;
}

.btn-block {
  width: 100%;
}

.btn-primary {
  background: var(--primary-600);
  color: #FFFFFF;
}

.btn-primary:hover {
  background: var(--primary-700);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
}

.btn-secondary {
  background: #FFFFFF;
  border-color: var(--slate-200);
  color: var(--navy-700);
}

.btn-secondary:hover {
  background: var(--slate-50);
  border-color: var(--slate-400);
}

.btn-emerald {
  background: var(--emerald-600);
  color: #FFFFFF;
}

.btn-emerald:hover {
  background: #047857;
  box-shadow: 0 4px 12px rgba(5, 150, 105, 0.25);
}

.btn-outline-primary {
  background: transparent;
  border-color: rgba(99, 102, 241, 0.5);
  color: #A5B4FC;
}

.btn-outline-primary:hover {
  background: rgba(99, 102, 241, 0.15);
  color: #FFFFFF;
}

.btn-outline-secondary {
  background: transparent;
  border-color: var(--slate-200);
  color: var(--slate-600);
}

.btn-outline-emerald {
  background: transparent;
  border-color: rgba(16, 185, 129, 0.4);
  color: var(--emerald-600);
}

.btn-icon {
  background: #FFFFFF;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-sm);
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--slate-600);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-icon:hover {
  background: var(--slate-100);
  color: var(--navy-900);
}

/* Badges & Pills */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 700;
  line-height: 1;
}

.badge-primary { background: var(--primary-100); color: var(--primary-700); }
.badge-emerald { background: #D1FAE5; color: #065F46; }
.badge-amber { background: #FEF3C7; color: #92400E; }
.badge-rose { background: #FFE4E6; color: #9F1239; }
.badge-purple { background: #EDE9FE; color: #5B21B6; }
.badge-slate { background: var(--slate-200); color: var(--slate-600); }

/* ==========================================================
   KPI CARDS GRID
   ========================================================== */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.kpi-card {
  background: #FFFFFF;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

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

.kpi-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.kpi-icon.blue { background: #EFF6FF; color: #2563EB; }
.kpi-icon.emerald { background: #ECFDF5; color: var(--emerald-600); }
.kpi-icon.amber { background: #FFFBEB; color: var(--amber-600); }
.kpi-icon.purple { background: #F5F3FF; color: var(--purple-500); }

.kpi-data {
  display: flex;
  flex-direction: column;
}

.kpi-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--slate-400);
}

.kpi-value {
  font-size: 22px;
  font-weight: 800;
  color: var(--navy-900);
  margin: 4px 0 2px 0;
}

.kpi-subtext {
  font-size: 11px;
  font-weight: 600;
}

.text-emerald { color: var(--emerald-600); }
.text-amber { color: var(--amber-600); }
.text-slate { color: var(--slate-500); }
.text-purple { color: var(--purple-500); }

/* ==========================================================
   CARDS & TABLES
   ========================================================== */
.card {
  background: #FFFFFF;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
  overflow: hidden;
}

.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--slate-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--navy-900);
}

.card-subtitle {
  font-size: 12px;
  color: var(--slate-500);
  display: block;
}

.card-body {
  padding: 20px;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.col-span-4 { grid-column: span 4; }
.col-span-5 { grid-column: span 5; }
.col-span-7 { grid-column: span 7; }
.col-span-8 { grid-column: span 8; }

.table-responsive {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13px;
}

.data-table th {
  background: var(--slate-50);
  padding: 12px 16px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--slate-500);
  border-bottom: 1px solid var(--slate-200);
}

.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--slate-200);
  color: var(--navy-700);
  vertical-align: middle;
}

.data-table tr:hover td {
  background-color: #F8FAFC;
}

.tracking-pill {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--primary-700);
  background: var(--primary-50);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  display: inline-block;
}

/* ==========================================================
   CHECK FEED IN DASHBOARD
   ========================================================== */
.check-feed {
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.check-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  background: var(--slate-50);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  transition: all 0.15s ease;
}

.check-item:hover {
  background: #FFFFFF;
  border-color: var(--emerald-500);
  box-shadow: var(--shadow-sm);
}

.check-item-info strong {
  display: block;
  font-size: 13px;
  color: var(--navy-900);
}

.check-item-info span {
  font-size: 11px;
  color: var(--slate-500);
}

.check-item-amount {
  text-align: right;
}

.check-item-amount strong {
  display: block;
  font-size: 15px;
  font-weight: 800;
  color: var(--emerald-600);
}

/* ==========================================================
   INDEXING DUAL-PANE WORKSPACE
   ========================================================== */
.indexing-split-layout {
  display: grid;
  grid-template-columns: 1fr 480px;
  gap: 24px;
  min-height: 680px;
}

.indexing-viewer-pane {
  background: #1E293B;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.viewer-toolbar {
  height: 48px;
  background: rgba(15, 23, 42, 0.9);
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.viewer-doc-id {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: #38BDF8;
}

.document-scan-canvas {
  flex: 1;
  background: #334155;
  padding: 24px;
  overflow: auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

.virtual-doc-page {
  width: 520px;
  min-height: 560px;
  background: #FFFFFF;
  border-radius: 4px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
  padding: 28px;
  position: relative;
  transition: transform 0.2s ease;
}

.doc-header-banner {
  border-bottom: 2px solid var(--navy-900);
  padding-bottom: 12px;
  margin-bottom: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.doc-official-seal {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.6px;
  color: var(--navy-900);
}

.doc-stamp {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  color: var(--rose-500);
  border: 1.5px dashed var(--rose-500);
  padding: 2px 6px;
  transform: rotate(-3deg);
}

.doc-preview-content {
  font-size: 12px;
  color: #334155;
  line-height: 1.6;
}

.doc-micr-line {
  margin-top: 40px;
  padding: 12px;
  background: #F8FAFC;
  border: 1px solid var(--slate-200);
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 3px;
  text-align: center;
  color: var(--navy-900);
  font-weight: bold;
}

.viewer-footer {
  height: 54px;
  background: #0F172A;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #94A3B8;
  font-size: 12px;
}

.physical-bin-tag strong {
  color: #38BDF8;
}

.indexing-form-pane {
  background: #FFFFFF;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.pane-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--slate-200);
}

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

.ocr-confidence-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 700;
  color: var(--emerald-600);
  background: #ECFDF5;
  padding: 4px 10px;
  border-radius: 12px;
}

.form-group {
  margin-bottom: 14px;
}

.form-row {
  display: flex;
  gap: 12px;
}

.col-6 { flex: 1; }

.form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--navy-800);
  margin-bottom: 5px;
}

.required {
  color: var(--rose-500);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 8px 12px;
  background: #FFFFFF;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  font-size: 13px;
  color: var(--navy-900);
  outline: none;
  transition: all 0.15s ease;
  font-family: inherit;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.check-extraction-box {
  background: #F0FDF4;
  border: 1px solid #BBF7D0;
  border-radius: var(--radius-md);
  padding: 14px;
  margin-bottom: 14px;
}

.box-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  color: #166534;
  margin-bottom: 10px;
}

.form-actions-bar {
  margin-top: auto;
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding-top: 16px;
  border-top: 1px solid var(--slate-200);
}

.indexing-tip {
  font-size: 12px;
  color: var(--slate-500);
}

.indexing-tip kbd {
  background: var(--slate-200);
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 11px;
  font-family: var(--font-mono);
}

/* ==========================================================
   CHECK PROCESSING & BATCH TAPING
   ========================================================== */
.batch-summary-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.batch-card-stat {
  background: #FFFFFF;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.batch-card-stat .label {
  font-size: 11px;
  font-weight: 600;
  color: var(--slate-400);
}

.batch-card-stat .val {
  font-size: 18px;
  font-weight: 800;
  color: var(--navy-900);
}

/* ==========================================================
   HIGH-VOLUME MAIL MERGE STUDIO
   ========================================================== */
.mailmerge-layout {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.tokens-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.token-tag {
  background: var(--primary-50);
  color: var(--primary-700);
  border: 1px solid var(--primary-100);
  border-radius: 4px;
  padding: 4px 8px;
  font-size: 11px;
  font-family: var(--font-mono);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.token-tag:hover {
  background: var(--primary-100);
  border-color: var(--primary-500);
}

.virtual-letter-sheet {
  background: #FFFFFF;
  border: 1px solid var(--slate-200);
  border-radius: 4px;
  box-shadow: var(--shadow-md);
  padding: 36px 40px;
  min-height: 600px;
  position: relative;
}

.letter-top-accent {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: #1E3A8A;
}

.letter-brand-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid var(--slate-200);
  padding-bottom: 12px;
  margin-bottom: 20px;
}

.letter-brand-logo {
  font-size: 16px;
  font-weight: 800;
  color: #0F172A;
  letter-spacing: -0.3px;
}

.letter-brand-addr {
  font-size: 9px;
  color: var(--slate-400);
}

.window-envelope-boxes {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 24px;
}

.recipient-window-box, .certified-tracking-box {
  flex: 1;
  border: 1px dashed var(--slate-200);
  padding: 10px 14px;
  border-radius: 4px;
  font-size: 11px;
  line-height: 1.4;
  position: relative;
}

.window-cut-tag {
  position: absolute;
  top: -8px;
  right: 8px;
  background: #F1F5F9;
  font-size: 8px;
  font-weight: 800;
  color: var(--slate-500);
  padding: 1px 4px;
}

.mini-barcode {
  font-family: var(--font-mono);
  font-weight: bold;
  letter-spacing: 2px;
  font-size: 13px;
  color: #1E3A8A;
}

.letter-subject-line {
  font-size: 12px;
  font-weight: 800;
  color: #0F172A;
  border-bottom: 1px solid var(--slate-200);
  padding-bottom: 6px;
  margin-bottom: 16px;
}

.letter-body-content {
  font-size: 11px;
  line-height: 1.7;
  color: #1E293B;
  white-space: pre-wrap;
  margin-bottom: 40px;
}

.remittance-voucher {
  border-top: 1px dashed var(--slate-400);
  padding-top: 12px;
  margin-top: 24px;
}

.voucher-perforate {
  text-align: center;
  font-size: 8px;
  font-weight: 800;
  color: var(--slate-500);
  letter-spacing: 1px;
  margin-bottom: 10px;
}

.voucher-content {
  background: var(--slate-50);
  border: 1px solid var(--slate-200);
  border-radius: 4px;
  padding: 12px 16px;
  display: flex;
  justify-content: space-between;
  font-size: 11px;
}

/* ==========================================================
   MODALS
   ========================================================== */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

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

.modal-dialog {
  background: #FFFFFF;
  border-radius: var(--radius-xl);
  width: 90%;
  max-width: 620px;
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  animation: modalPop 0.2s ease-out;
}

.modal-dialog.modal-sm {
  max-width: 440px;
}

@keyframes modalPop {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

.modal-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--slate-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 16px;
  font-weight: 800;
  color: var(--navy-900);
}

.modal-close {
  background: transparent;
  border: none;
  font-size: 22px;
  line-height: 1;
  color: var(--slate-400);
  cursor: pointer;
}

.modal-body {
  padding: 24px;
  max-height: 75vh;
  overflow-y: auto;
}

.modal-footer {
  padding: 14px 24px;
  background: var(--slate-50);
  border-top: 1px solid var(--slate-200);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* Printable Thermal Label */
.printable-thermal-label {
  border: 2px dashed #0F172A;
  border-radius: 8px;
  padding: 16px;
  background: #FFFFFF;
  color: #0F172A;
  margin: 0 auto;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 2000;
}

.toast {
  background: #0F172A;
  color: #FFFFFF;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideIn 0.2s ease-out;
}

.toast.success { border-left: 4px solid var(--emerald-500); }
.toast.error { border-left: 4px solid var(--rose-500); }

@keyframes slideIn {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

/* Flex Utilities */
.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.filters-bar {
  display: flex;
  align-items: center;
  gap: 8px;
}

.filter-pill {
  background: var(--slate-100);
  border: 1px solid var(--slate-200);
  border-radius: 16px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--slate-600);
  cursor: pointer;
  transition: all 0.15s ease;
}

.filter-pill:hover {
  background: var(--slate-200);
}

.filter-pill.active {
  background: var(--primary-600);
  color: #FFFFFF;
  border-color: var(--primary-600);
}