/* ===== UniPal OCR - Design System ===== */

:root {
  /* Color Palette - Premium Dark Theme */
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: #1a2236;
  --bg-card-hover: #1f2942;
  --bg-input: #0d1321;
  --bg-sidebar: #0c1120;
  
  /* Accent Colors */
  --accent-primary: #6366f1;
  --accent-primary-light: #818cf8;
  --accent-primary-dark: #4f46e5;
  --accent-gradient: linear-gradient(135deg, #6366f1, #8b5cf6);
  --accent-glow: rgba(99, 102, 241, 0.3);
  
  --accent-success: #10b981;
  --accent-success-bg: rgba(16, 185, 129, 0.12);
  --accent-warning: #f59e0b;
  --accent-warning-bg: rgba(245, 158, 11, 0.12);
  --accent-danger: #ef4444;
  --accent-danger-bg: rgba(239, 68, 68, 0.12);
  --accent-info: #3b82f6;
  --accent-info-bg: rgba(59, 130, 246, 0.12);
  
  /* Text */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;
  
  /* Borders */
  --border-color: rgba(148, 163, 184, 0.1);
  --border-color-hover: rgba(148, 163, 184, 0.2);
  
  /* Typography */
  --font-primary: 'Cairo', 'Inter', sans-serif;
  --font-english: 'Inter', sans-serif;
  
  /* Spacing */
  --sidebar-width: 280px;
  --sidebar-collapsed: 72px;
  --topbar-height: 70px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 30px var(--accent-glow);
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
  font-family: var(--font-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  display: flex;
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

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

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

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

.logo-icon {
  width: 48px;
  height: 48px;
  background: var(--accent-gradient);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow);
}

.logo-icon .material-icons-round {
  font-size: 26px;
  color: white;
}

.logo-text h1 {
  font-size: 1.3rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

.logo-text span {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  position: relative;
}

.nav-item:hover {
  background: rgba(99, 102, 241, 0.08);
  color: var(--text-primary);
}

.nav-item.active {
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-primary-light);
}

.nav-item.active::before {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 24px;
  background: var(--accent-gradient);
  border-radius: 0 3px 3px 0;
}

.nav-item .material-icons-round {
  font-size: 22px;
}

.nav-badge {
  margin-right: auto;
  background: var(--accent-primary);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 20px;
  min-width: 22px;
  text-align: center;
}

.nav-badge.alert-badge {
  background: var(--accent-danger);
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border-color);
}

.ai-status {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 10px 14px;
  background: rgba(99, 102, 241, 0.06);
  border-radius: var(--radius-sm);
}

.ai-status .material-icons-round {
  font-size: 18px;
  color: var(--accent-primary-light);
}

.ai-status.active {
  color: var(--accent-success);
}

.ai-status.active .material-icons-round {
  color: var(--accent-success);
}

/* ===== Main Content ===== */
.main-content {
  flex: 1;
  margin-right: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== Topbar ===== */
.topbar {
  height: var(--topbar-height);
  background: rgba(10, 14, 26, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  padding: 0 28px;
  gap: 20px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
}

.menu-toggle:hover {
  background: rgba(255,255,255,0.05);
}

.topbar-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
}

.topbar-actions {
  margin-right: auto;
  display: flex;
  align-items: center;
  gap: 14px;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 8px 16px;
  width: 300px;
  transition: all var(--transition-fast);
}

.search-box:focus-within {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-box .material-icons-round {
  font-size: 20px;
  color: var(--text-muted);
}

.search-box input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 0.9rem;
}

.search-box input::placeholder {
  color: var(--text-muted);
}

/* ===== Page Content ===== */
.page-content {
  flex: 1;
  padding: 28px;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Dashboard Stats ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

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

.stat-card:hover::before {
  opacity: 1;
}

.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}

.stat-icon.primary { background: rgba(99, 102, 241, 0.15); color: var(--accent-primary-light); }
.stat-icon.success { background: var(--accent-success-bg); color: var(--accent-success); }
.stat-icon.warning { background: var(--accent-warning-bg); color: var(--accent-warning); }
.stat-icon.danger { background: var(--accent-danger-bg); color: var(--accent-danger); }
.stat-icon.info { background: var(--accent-info-bg); color: var(--accent-info); }

.stat-info {
  flex: 1;
}

.stat-value {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 4px;
  font-family: var(--font-english);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ===== Cards & Panels ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
}

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

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

.card-header h2 {
  font-size: 1.1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
}

.card-header h2 .material-icons-round {
  font-size: 22px;
  color: var(--accent-primary-light);
}

.card-body {
  padding: 20px 24px;
}

.card-footer {
  padding: 14px 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: center;
}

/* ===== Details Accordions ===== */
.details-accordion {
  margin-bottom: 24px;
}

.details-accordion summary {
  cursor: pointer;
  list-style: none; /* Hide default arrow */
}

.details-accordion summary::-webkit-details-marker {
  display: none; /* Hide default arrow in webkit */
}

.details-accordion summary::after {
  content: 'expand_more';
  font-family: 'Material Icons Round';
  font-size: 24px;
  color: var(--text-secondary);
  transition: transform var(--transition-fast);
}

.details-accordion[open] summary::after {
  transform: rotate(180deg);
}

/* ===== Grid Layouts ===== */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* ===== Tables ===== */
.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th {
  padding: 14px 16px;
  text-align: right;
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.data-table td {
  padding: 14px 16px;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}

.data-table tbody tr {
  transition: background var(--transition-fast);
}

.data-table tbody tr:hover {
  background: rgba(99, 102, 241, 0.04);
}

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

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-primary);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn .material-icons-round {
  font-size: 18px;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: 0 2px 8px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px var(--accent-glow);
}

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

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-color-hover);
}

.btn-success {
  background: var(--accent-success);
  color: white;
}

.btn-danger {
  background: var(--accent-danger);
  color: white;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.8rem;
}

.btn-icon {
  padding: 8px;
  border-radius: var(--radius-sm);
}

/* ===== Badges ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-success {
  background: var(--accent-success-bg);
  color: var(--accent-success);
}

.badge-warning {
  background: var(--accent-warning-bg);
  color: var(--accent-warning);
}

.badge-danger {
  background: var(--accent-danger-bg);
  color: var(--accent-danger);
}

.badge-info {
  background: var(--accent-info-bg);
  color: var(--accent-info);
}

.badge-primary {
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-primary-light);
}

/* ===== Upload Zone ===== */
.upload-zone {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-xl);
  padding: 60px 40px;
  text-align: center;
  transition: all var(--transition-normal);
  cursor: pointer;
  background: rgba(99, 102, 241, 0.03);
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.08);
  box-shadow: var(--shadow-glow);
}

.upload-zone .material-icons-round {
  font-size: 56px;
  color: var(--accent-primary-light);
  margin-bottom: 16px;
}

.upload-zone h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.upload-zone p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.upload-zone input[type="file"] {
  display: none;
}

/* ===== Forms ===== */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-input,
.form-select {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

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

/* ===== Student Profile ===== */
.profile-header {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
}

.profile-header::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 4px;
  background: var(--accent-gradient);
}

.profile-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 800;
  color: white;
  flex-shrink: 0;
  box-shadow: var(--shadow-glow);
}

.profile-info h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.profile-info .profile-meta {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.profile-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.profile-meta-item .material-icons-round {
  font-size: 16px;
  color: var(--accent-primary-light);
}

.profile-completeness {
  margin-right: auto;
  text-align: center;
}

.progress-ring {
  width: 80px;
  height: 80px;
}

.progress-ring-circle {
  transition: stroke-dashoffset var(--transition-slow);
  transform: rotate(-90deg);
  transform-origin: 50% 50%;
}

/* ===== Document Checklist ===== */
.checklist {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.checklist-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.02);
  transition: background var(--transition-fast);
}

.checklist-item:hover {
  background: rgba(255,255,255,0.04);
}

.checklist-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

.checklist-item.available .checklist-icon {
  background: var(--accent-success-bg);
  color: var(--accent-success);
}

.checklist-item.missing .checklist-icon {
  background: var(--accent-danger-bg);
  color: var(--accent-danger);
}

.checklist-name {
  flex: 1;
  font-weight: 500;
}

.checklist-status {
  font-size: 0.8rem;
  font-weight: 600;
}

/* ===== Extracted Data ===== */
.extracted-field {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
}

.extracted-field:last-child {
  border-bottom: none;
}

.field-key {
  min-width: 140px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.field-value {
  flex: 1;
  font-size: 0.95rem;
  color: var(--text-primary);
  font-family: var(--font-english);
}

.field-confidence {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 12px;
  font-weight: 600;
  font-family: var(--font-english);
}

.confidence-high { background: var(--accent-success-bg); color: var(--accent-success); }
.confidence-medium { background: var(--accent-warning-bg); color: var(--accent-warning); }
.confidence-low { background: var(--accent-danger-bg); color: var(--accent-danger); }

.field-edit-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  transition: all var(--transition-fast);
}

.field-edit-btn:hover {
  color: var(--accent-primary-light);
  background: rgba(99, 102, 241, 0.1);
}

/* ===== Processing Status ===== */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
}

.status-pending { background: var(--accent-warning-bg); color: var(--accent-warning); }
.status-processing { background: var(--accent-info-bg); color: var(--accent-info); }
.status-completed { background: var(--accent-success-bg); color: var(--accent-success); }
.status-failed { background: var(--accent-danger-bg); color: var(--accent-danger); }

/* ===== Import Section ===== */
.import-section {
  max-width: 800px;
}

.folder-input-group {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
}

.folder-input-group .form-input {
  flex: 1;
}

.batch-results {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 500px;
  overflow-y: auto;
}

.batch-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: rgba(255,255,255,0.02);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.batch-item .material-icons-round {
  font-size: 20px;
}

.batch-item.processing .material-icons-round {
  color: var(--accent-info);
  animation: spin 1s linear infinite;
}

.batch-item.completed .material-icons-round {
  color: var(--accent-success);
}

.batch-item.error .material-icons-round {
  color: var(--accent-danger);
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.batch-item-name {
  flex: 1;
  font-weight: 500;
}

.batch-item-status {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.batch-item.queued {
  border-color: var(--accent-info);
  background: rgba(56, 189, 248, 0.05);
}

.batch-item.queued .material-icons-round {
  color: var(--accent-info);
}

.batch-item.processed .material-icons-round {
  color: var(--accent-success);
}

.spin-icon {
  animation: spin 1.5s linear infinite;
}

/* ===== Alert Cards ===== */
.alert-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  margin-bottom: 10px;
  transition: all var(--transition-fast);
}

.alert-card:hover {
  background: rgba(255,255,255,0.02);
}

.alert-card.severity-critical {
  border-right: 3px solid var(--accent-danger);
}

.alert-card.severity-warning {
  border-right: 3px solid var(--accent-warning);
}

.alert-card.severity-info {
  border-right: 3px solid var(--accent-info);
}

.alert-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.severity-critical .alert-icon {
  background: var(--accent-danger-bg);
  color: var(--accent-danger);
}

.severity-warning .alert-icon {
  background: var(--accent-warning-bg);
  color: var(--accent-warning);
}

.severity-info .alert-icon {
  background: var(--accent-info-bg);
  color: var(--accent-info);
}

.alert-content {
  flex: 1;
}

.alert-message {
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 4px;
}

.alert-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===== Chart Placeholder ===== */
.chart-container {
  padding: 20px;
  min-height: 300px;
  display: flex;
  flex-direction: column;
}

.chart-bars {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  flex: 1;
  padding: 20px 0;
}

.chart-bar-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.chart-bar {
  width: 100%;
  max-width: 60px;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  background: var(--accent-gradient);
  transition: height var(--transition-slow);
  min-height: 4px;
  position: relative;
}

.chart-bar:hover {
  opacity: 0.85;
}

.chart-bar-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-align: center;
  writing-mode: horizontal-tb;
}

.chart-bar-value {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-english);
}

/* ===== Document Type Filter ===== */
.type-filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.type-filter {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.type-filter:hover,
.type-filter.active {
  background: rgba(99, 102, 241, 0.12);
  border-color: var(--accent-primary);
  color: var(--accent-primary-light);
}

.type-filter .count {
  background: rgba(255,255,255,0.1);
  padding: 1px 7px;
  border-radius: 10px;
  font-size: 0.7rem;
  font-family: var(--font-english);
}

/* ===== Modal ===== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

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

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 700px;
  max-height: 85vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  animation: modalIn 0.3s ease;
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

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

.modal-header h3 {
  font-size: 1.1rem;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
  flex: 1;
}

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

.toast {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  min-width: 300px;
  animation: toastIn 0.4s ease;
  color: var(--text-primary);
}

.toast.toast-out {
  animation: toastOut 0.3s ease forwards;
}

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

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

.toast.success { border-right: 3px solid var(--accent-success); }
.toast.error { border-right: 3px solid var(--accent-danger); }
.toast.warning { border-right: 3px solid var(--accent-warning); }
.toast.info { border-right: 3px solid var(--accent-info); }

.toast .material-icons-round {
  font-size: 22px;
}

.toast.success .material-icons-round { color: var(--accent-success); }
.toast.error .material-icons-round { color: var(--accent-danger); }
.toast.warning .material-icons-round { color: var(--accent-warning); }
.toast.info .material-icons-round { color: var(--accent-info); }

.toast-message {
  flex: 1;
  font-size: 0.9rem;
}

/* ===== Loading Overlay ===== */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 3000;
}

.loading-overlay.active {
  display: flex;
}

.loading-spinner {
  text-align: center;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--border-color);
  border-top: 3px solid var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}

.loading-spinner p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

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

.empty-state .material-icons-round {
  font-size: 56px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.empty-state h3 {
  font-size: 1.2rem;
  color: var(--text-primary);
  margin-bottom: 8px;
}

/* ===== Pagination ===== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  padding: 20px 0;
}

.pagination button {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-secondary);
  cursor: pointer;
  font-family: var(--font-primary);
  font-size: 0.85rem;
  transition: all var(--transition-fast);
}

.pagination button:hover:not(:disabled) {
  border-color: var(--accent-primary);
  color: var(--accent-primary-light);
}

.pagination button.active {
  background: var(--accent-gradient);
  color: white;
  border-color: transparent;
}

.pagination button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ===== OCR Text Display ===== */
.ocr-text-display {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  font-family: 'Courier New', monospace;
  font-size: 0.8rem;
  line-height: 1.8;
  max-height: 300px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-wrap: break-word;
  color: var(--text-secondary);
  direction: ltr;
  text-align: left;
}

/* ===== Document Type Icons ===== */
.doc-type-icon {
  font-size: 1.4rem;
  min-width: 32px;
  text-align: center;
}

/* ===== Student Card ===== */
.student-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
  cursor: pointer;
}

.student-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-primary);
  box-shadow: 0 4px 20px var(--accent-glow);
}

.student-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

.student-card-info {
  flex: 1;
}

.student-card-info h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.student-card-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.student-card-stats {
  display: flex;
  gap: 16px;
  align-items: center;
}

.mini-stat {
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.mini-stat-value {
  font-size: 1.2rem;
  font-weight: 700;
  font-family: var(--font-english);
  display: block;
  color: var(--text-primary);
}

/* ===== Document Split View ===== */
.doc-view-topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.doc-view-title {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  min-width: 0;
}

.doc-view-title h3 {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 400px;
}

.doc-split-view {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 16px;
  height: calc(100vh - 240px);
  min-height: 500px;
}

.doc-preview-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.doc-preview-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.02);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.doc-preview-header .material-icons-round {
  font-size: 18px;
  color: var(--accent-primary-light);
}

.doc-preview-zoom {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-right: auto;
}

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  padding: 0;
  border: none;
  border-radius: var(--radius-sm);
  background: none;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  background: rgba(99, 102, 241, 0.1);
  color: var(--accent-primary-light);
}

.btn-icon .material-icons-round {
  font-size: 18px;
}

.doc-preview-body {
  flex: 1;
  overflow: auto;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  background: #0d1117;
  position: relative;
}

.doc-preview-iframe {
  width: 100%;
  height: 100%;
  border: none;
  background: white;
  transition: transform 0.2s ease;
}

.doc-preview-image-wrap {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  overflow: auto;
  padding: 16px;
}

.doc-preview-image {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  transition: transform 0.2s ease;
  transform-origin: top center;
}

/* Data Panel */
.doc-data-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.doc-data-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.02);
  overflow-x: auto;
}

.doc-tab {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  border: none;
  background: none;
  color: var(--text-muted);
  font-family: var(--font-primary);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  white-space: nowrap;
}

.doc-tab .material-icons-round {
  font-size: 16px;
}

.doc-tab:hover {
  color: var(--text-secondary);
  background: rgba(99, 102, 241, 0.05);
}

.doc-tab.active {
  color: var(--accent-primary-light);
}

.doc-tab.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  left: 0;
  height: 2px;
  background: var(--accent-gradient);
  border-radius: 2px 2px 0 0;
}

.tab-count {
  background: rgba(99, 102, 241, 0.2);
  color: var(--accent-primary-light);
  padding: 1px 8px;
  border-radius: 10px;
  font-size: 0.7rem;
  font-family: var(--font-english);
}

.doc-tab-content {
  display: none;
  flex: 1;
  overflow-y: auto;
  padding: 16px;
}

.doc-tab-content.active {
  display: block;
}

.doc-fields-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.doc-field-row {
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

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

.doc-field-row:hover {
  background: rgba(99, 102, 241, 0.04);
}

.doc-field-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.3px;
  margin-bottom: 6px;
}

.doc-field-value-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.doc-field-value-row .field-value {
  flex: 1;
  font-size: 0.95rem;
  color: var(--text-primary);
  font-family: var(--font-english);
  word-break: break-word;
}

.doc-field-value-row .field-confidence {
  flex-shrink: 0;
}

.doc-field-value-row .field-edit-btn {
  flex-shrink: 0;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.doc-field-row:hover .field-edit-btn {
  opacity: 1;
}

.form-select {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-primary);
  cursor: pointer;
}

/* ===== Document Detail Page (Enhanced) ===== */

.doc-detail-hero {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 24px 28px;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}

.doc-detail-hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 4px;
  background: var(--accent-gradient);
}

.doc-detail-back {
  margin-bottom: 16px;
}

.doc-detail-hero-body {
  display: flex;
  align-items: flex-start;
  gap: 20px;
}

.doc-detail-icon-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.doc-detail-icon {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-lg);
  background: rgba(99, 102, 241, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  box-shadow: var(--shadow-glow);
  border: 1px solid rgba(99, 102, 241, 0.2);
}

.doc-detail-ext {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-family: var(--font-english);
}

.doc-detail-identity {
  flex: 1;
  min-width: 0;
}

.doc-detail-name {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 600px;
  font-family: var(--font-english);
}

.doc-detail-badges {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.doc-detail-meta-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.doc-detail-meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  border-radius: 20px;
  background: rgba(148, 163, 184, 0.08);
  font-size: 0.78rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  font-family: var(--font-english);
}

.doc-detail-meta-chip .material-icons-round {
  font-size: 14px;
  color: var(--accent-primary-light);
}

a.doc-detail-meta-chip:hover {
  background: rgba(99, 102, 241, 0.12);
  color: var(--accent-primary-light);
}

.doc-detail-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex-shrink: 0;
}

.doc-detail-error {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  background: var(--accent-danger-bg);
  border: 1px solid rgba(239, 68, 68, 0.2);
  font-size: 0.85rem;
  color: var(--accent-danger);
}

.doc-detail-error .material-icons-round {
  font-size: 20px;
  flex-shrink: 0;
}

/* Split view */
.doc-detail-split {
  display: grid;
  grid-template-columns: 1fr 460px;
  gap: 20px;
  height: calc(100vh - 310px);
  min-height: 420px;
}

.doc-detail-preview-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.doc-detail-section-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.02);
}

.doc-detail-section-header .material-icons-round {
  font-size: 20px;
  color: var(--accent-primary-light);
}

.doc-detail-section-header h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.doc-detail-data-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Extracted Fields Grid */
.doc-detail-fields-grid {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.doc-detail-field-card {
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.015);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.doc-detail-field-card:hover {
  border-color: rgba(99, 102, 241, 0.25);
  background: rgba(99, 102, 241, 0.04);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

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

.doc-detail-field-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.doc-detail-field-badges {
  display: flex;
  align-items: center;
  gap: 6px;
}

.doc-detail-field-value-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.doc-detail-field-val {
  flex: 1;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  font-family: var(--font-english);
  word-break: break-word;
  line-height: 1.4;
}

.doc-detail-field-card:hover .field-edit-btn {
  opacity: 1;
}

/* Divider resize handle */
.doc-split-view::after {
  content: '';
}

/* ===== Region Select & Crop OCR ===== */

.btn-success {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: white;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
  background: linear-gradient(135deg, #059669 0%, #047857 100%);
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.3);
  transform: translateY(-1px);
}

.btn-success.active-tool {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%) !important;
  border-color: rgba(239, 68, 68, 0.3) !important;
  animation: pulse-region 1.5s ease-in-out infinite;
}

@keyframes pulse-region {
  0%, 100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.3); }
  50% { box-shadow: 0 0 0 6px rgba(239, 68, 68, 0); }
}

.region-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  cursor: crosshair;
  z-index: 50;
  background: rgba(0, 0, 0, 0.15);
  user-select: none;
}

.region-overlay.active {
  display: block;
}

.region-hint {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 24px;
  color: #10b981;
  font-size: 0.85rem;
  font-weight: 600;
  z-index: 55;
  pointer-events: none;
  white-space: nowrap;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.region-hint .material-icons-round {
  font-size: 18px;
}

.region-rect {
  position: absolute;
  display: none;
  border: 2px dashed #10b981;
  background: rgba(16, 185, 129, 0.12);
  border-radius: 4px;
  pointer-events: none;
  z-index: 52;
  box-shadow: 0 0 0 3000px rgba(0, 0, 0, 0.35);
  animation: region-rect-glow 1.2s ease-in-out infinite;
}

@keyframes region-rect-glow {
  0%, 100% { border-color: #10b981; }
  50% { border-color: #34d399; }
}

.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-input {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 0.9rem;
  transition: border-color var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }

  .doc-split-view {
    grid-template-columns: 1fr;
    height: auto;
  }

  .doc-preview-panel {
    height: 50vh;
    min-height: 360px;
  }

  .doc-data-panel {
    height: auto;
    max-height: 60vh;
  }

  .doc-detail-split {
    grid-template-columns: 1fr;
    height: auto;
  }

  .doc-detail-preview-card {
    height: 50vh;
    min-height: 360px;
  }

  .doc-detail-data-card {
    height: auto;
    max-height: 60vh;
  }

  .doc-detail-hero-body {
    flex-wrap: wrap;
  }

  .doc-detail-actions {
    flex-direction: row;
    width: 100%;
  }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(100%);
  }
  
  .sidebar.open {
    transform: translateX(0);
  }

  .main-content {
    margin-right: 0;
  }

  .menu-toggle {
    display: block;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .search-box {
    width: 200px;
  }

  .page-content {
    padding: 16px;
  }

  .profile-header {
    flex-direction: column;
    text-align: center;
  }

  .profile-completeness {
    margin: 0 auto;
  }

  .doc-view-topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .doc-view-title h3 {
    max-width: 100%;
  }

  .doc-split-view {
    grid-template-columns: 1fr;
    height: auto;
  }

  .doc-preview-panel {
    height: 40vh;
    min-height: 280px;
  }

  .doc-detail-hero-body {
    flex-direction: column;
    align-items: stretch;
  }

  .doc-detail-icon-wrap {
    flex-direction: row;
    gap: 12px;
  }

  .doc-detail-icon {
    width: 52px;
    height: 52px;
    font-size: 1.6rem;
  }

  .doc-detail-name {
    font-size: 1rem;
    max-width: 100%;
  }

  .doc-detail-actions {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .doc-detail-split {
    grid-template-columns: 1fr;
    height: auto;
  }

  .doc-detail-preview-card {
    height: 40vh;
    min-height: 280px;
  }

  .doc-detail-data-card {
    max-height: none;
  }
}