:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-glow: rgba(59, 130, 246, 0.35);
  --success: #10b981;
  --success-hover: #059669;
  --success-bg: rgba(16, 185, 129, 0.15);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.15);
  --danger: #ef4444;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border: #334155;
  --border-focus: #60a5fa;
  --card-bg: rgba(30, 41, 59, 0.85);
  --glass-border: rgba(255, 255, 255, 0.08);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* Header */
header {
  height: 54px;
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 100;
}

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

.logo-badge {
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  padding: 5px 10px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.5px;
  box-shadow: 0 0 15px var(--accent-glow);
}

.app-title {
  font-size: 16px;
  font-weight: 600;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Main Layout */
.main-container {
  display: flex;
  flex: 1;
  height: calc(100vh - 54px);
  overflow: hidden;
}

/* Left Panel: Viewer */
.viewer-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: #090d16;
  position: relative;
  overflow: hidden;
}

/* Viewer Toolbar */
.toolbar {
  height: 48px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  z-index: 10;
  gap: 10px;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Tool Buttons */
.btn-tool {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 12px;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-tool:hover {
  background: var(--border);
  color: var(--text-primary);
}

.toggle-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: all 0.2s;
}

.btn-tool.active {
  background: rgba(16, 185, 129, 0.2);
  border-color: var(--success);
  color: #34d399;
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.3);
}

.btn-tool.active .toggle-indicator {
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
}

.btn-pen.active {
  background: rgba(245, 158, 11, 0.2);
  border-color: var(--warning);
  color: #fbbf24;
  box-shadow: 0 0 12px rgba(245, 158, 11, 0.3);
}

.btn-pen.active .toggle-indicator {
  background: var(--warning);
  box-shadow: 0 0 8px var(--warning);
}

.pen-controls-group {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-primary);
  padding: 2px 6px;
  border-radius: 6px;
  border: 1px solid var(--border);
}

.pen-select {
  padding: 3px 6px;
  font-size: 11px;
  height: 26px;
  border-radius: 4px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border);
  cursor: pointer;
}

.page-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-primary);
  padding: 3px 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
  font-size: 12px;
}

.page-input {
  width: 42px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-primary);
  text-align: center;
  font-size: 12px;
  padding: 2px;
}

/* Canvas Area */
.canvas-wrapper {
  flex: 1;
  position: relative;
  overflow: auto;
  display: block;
  text-align: center;
  padding: 20px 20px 100px 20px;
  cursor: default;
  background: radial-gradient(circle, #1e293b 10%, #090d16 90%);
  scroll-behavior: smooth;
}

#pdfCanvas {
  display: inline-block;
  vertical-align: top;
  margin: 0 auto;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7);
  border-radius: 4px;
  transform-origin: top center;
  transition: transform 0.15s ease-out;
}

/* Right Panel: Modes & Tabs */
.sidebar-panel {
  width: 500px;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 20;
}

/* Mode Switcher Banner */
.mode-switcher-bar {
  background: #0b1120;
  padding: 8px 12px;
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--border);
}

.mode-pill {
  flex: 1;
  padding: 7px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.2s;
}

.mode-pill:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.mode-pill.active {
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  border-color: #60a5fa;
  color: #ffffff;
  box-shadow: 0 0 12px var(--accent-glow);
}

.sidebar-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  background: var(--bg-primary);
}

.tab-btn {
  flex: 1;
  padding: 10px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.2s;
}

.tab-btn.active {
  color: var(--text-primary);
  border-bottom: 2px solid var(--accent);
  background: var(--bg-secondary);
}

.tab-content {
  flex: 1;
  overflow-y: auto;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tab-pane {
  display: none;
  height: 100%;
}

.tab-pane.active {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* AI Scan Button Banner */
.ai-scan-banner {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(139, 92, 246, 0.15));
  border: 1px solid rgba(96, 165, 250, 0.3);
  border-radius: 8px;
  padding: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.btn-ai-scan {
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  color: #fff;
  border: none;
  padding: 8px 16px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 0 15px var(--accent-glow);
  transition: all 0.2s;
}

.btn-ai-scan:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 20px var(--accent-glow);
}

/* Header Meta Card */
.header-meta-card {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

/* Form Styles */
.form-card {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.form-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--glass-border);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.form-group label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-group label .req {
  color: var(--danger);
}

.form-control {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 7px 10px;
  color: var(--text-primary);
  font-size: 12px;
  transition: border-color 0.2s;
}

.form-control:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.form-control-sm {
  padding: 4px 6px;
  font-size: 12px;
}

.form-actions {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}

.help-card {
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 6px;
  padding: 8px 10px;
}

/* Autocomplete dropdown with Keyboard Support */
.autocomplete-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border-focus);
  border-radius: 6px;
  max-height: 200px;
  overflow-y: auto;
  z-index: 100;
  box-shadow: 0 10px 25px rgba(0,0,0,0.6);
  display: none;
}

.autocomplete-dropdown.show {
  display: block;
}

.autocomplete-item {
  padding: 8px 12px;
  font-size: 12px;
  cursor: pointer;
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.autocomplete-item:hover, .autocomplete-item.selected {
  background: var(--accent);
  color: #fff;
}

.autocomplete-item.selected::after {
  content: '↵ Enter';
  font-size: 10px;
  opacity: 0.8;
}

/* AI Scanned Items Table */
.ai-items-container {
  flex: 1;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-primary);
}

.ai-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}

.ai-table th {
  background: #1e293b;
  padding: 8px;
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 2;
}

.ai-table td {
  padding: 6px 8px;
  border-bottom: 1px solid var(--glass-border);
  vertical-align: middle;
}

/* Light Yellow Recheck Row Highlight */
.row-recheck {
  background: rgba(254, 240, 138, 0.16) !important;
  border-left: 3px solid #facc15;
}

.row-recheck:hover {
  background: rgba(254, 240, 138, 0.25) !important;
}

.row-validated {
  background: rgba(16, 185, 129, 0.08);
  border-left: 3px solid #10b981;
}

/* Modal */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 3000;
}

.modal-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 440px;
  max-width: 90vw;
  box-shadow: 0 20px 40px rgba(0,0,0,0.6);
  display: flex;
  flex-direction: column;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 16px;
  cursor: pointer;
}

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

.modal-body {
  padding: 18px;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 12px 18px;
  border-top: 1px solid var(--border);
  background: var(--bg-primary);
}

/* Buttons */
.btn {
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.2s;
}

.btn:hover {
  background: var(--border);
}

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

.btn-primary:hover {
  background: var(--accent-hover);
}

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

.btn-success:hover {
  background: var(--success-hover);
}

.btn-danger {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

.btn-sm {
  padding: 4px 8px;
  font-size: 11px;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 2px 6px;
  border-radius: 10px;
  font-size: 10px;
  font-weight: 600;
}

.badge-exact {
  background: #065f46;
  color: #6ee7b7;
}

.badge-high {
  background: #1e3a8a;
  color: #93c5fd;
}

.badge-recheck {
  background: #854d0e;
  color: #fef08a;
}

/* Chips */
.suggestion-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 4px;
}

.chip {
  padding: 3px 7px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 11px;
  cursor: pointer;
  transition: all 0.15s;
}

.chip:hover, .chip.selected {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* Toasts */
.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  z-index: 2000;
}

.toast {
  background: var(--bg-secondary);
  color: #fff;
  padding: 10px 14px;
  border-radius: 6px;
  border: 1px solid var(--glass-border);
  box-shadow: 0 8px 20px rgba(0,0,0,0.5);
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  animation: slideUp 0.25s ease;
}

@keyframes slideUp {
  from { transform: translateY(15px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* Table Inline Autocomplete Dropdown */
.table-autocomplete-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: #1e293b;
  border: 1px solid #3b82f6;
  border-radius: 6px;
  max-height: 180px;
  overflow-y: auto;
  z-index: 100;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.6);
  display: none;
}

.table-autocomplete-dropdown.show {
  display: block;
}

.table-autocomplete-item {
  padding: 6px 10px;
  font-size: 11px;
  color: #f1f5f9;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.table-autocomplete-item:hover,
.table-autocomplete-item.selected {
  background: #2563eb;
  color: #ffffff;
  font-weight: 600;
}

.table-autocomplete-item.selected::after {
  content: '↵ Enter';
  font-size: 9px;
  opacity: 0.8;
}