/* ============================================================
   CoreSynch — Modern Redesign Stylesheet
   ============================================================ */

/* ── Variables ── */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: rgba(99, 102, 241, 0.08);
  --primary-glow: rgba(99, 102, 241, 0.25);
  --secondary: #0ea5e9;
  --accent: #f59e0b;
  --success: #10b981;
  --danger: #ef4444;
  --dark: #0f172a;
  --gray-900: #1e293b;
  --gray-700: #334155;
  --gray-500: #64748b;
  --gray-400: #94a3b8;
  --gray-200: #e2e8f0;
  --gray-100: #f1f5f9;
  --gray-50: #f8fafc;
  --white: #ffffff;
  --bg: #f8fafc;
  --surface: #ffffff;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.1);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--gray-900);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main { flex: 1; }

img { max-width: 100%; height: auto; }
a { text-decoration: none; color: inherit; }
a:hover { text-decoration: none; }

/* ── Container ── */
.container { max-width: 1200px; padding-left: 1.5rem; padding-right: 1.5rem; }

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  background: rgba(255, 255, 255, 0.85) !important;
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--gray-200);
  padding: 0.65rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar-brand {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--dark) !important;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.navbar-brand i { color: var(--primary); font-size: 1.3rem; }

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-500) !important;
  padding: 0.45rem 0.9rem !important;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.nav-link:hover {
  color: var(--gray-900) !important;
  background: var(--gray-100);
}

.nav-link.btn-primary {
  background: var(--primary) !important;
  color: var(--white) !important;
  padding: 0.45rem 1.1rem !important;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.85rem;
}

.nav-link.btn-primary:hover {
  background: var(--primary-dark) !important;
  transform: translateY(-1px);
}

.navbar-toggler { border: none; padding: 0.4rem; }
.navbar-toggler:focus { box-shadow: none; }
.navbar-toggler-icon { width: 1.2em; height: 1.2em; }

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
  position: relative;
  padding: 5rem 0 4rem;
  background: linear-gradient(135deg, #f8fafc 0%, #eef2ff 50%, #f0f9ff 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 70%;
  height: 140%;
  background: radial-gradient(ellipse, rgba(99, 102, 241, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -10%;
  width: 50%;
  height: 80%;
  background: radial-gradient(ellipse, rgba(14, 165, 233, 0.04) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(99, 102, 241, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99, 102, 241, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.15);
  padding: 0.35rem 0.85rem;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: 1.25rem;
}

.hero-badge i { font-size: 0.75rem; }

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: var(--dark);
  margin-bottom: 1rem;
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--primary) 0%, #818cf8 50%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--gray-500);
  max-width: 540px;
  margin-bottom: 1.75rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.btn-hero-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--primary);
  color: var(--white);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.25s ease;
  border: none;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
}

.btn-hero-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
  color: var(--white);
}

.btn-hero-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--white);
  color: var(--gray-700);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  border: 1.5px solid var(--gray-200);
  transition: all 0.25s ease;
}

.btn-hero-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.hero-stats {
  display: flex;
  gap: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--gray-200);
}

.hero-stat {
  display: flex;
  flex-direction: column;
}

.hero-stat-value {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--dark);
  line-height: 1.2;
}

.hero-stat-label {
  font-size: 0.8rem;
  color: var(--gray-400);
  font-weight: 500;
}

/* Hero right panel card */
.hero-panel {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(99, 102, 241, 0.1);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-lg);
}

.hero-panel-item {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--gray-100);
}

.hero-panel-item:last-child { border-bottom: none; }

.hero-panel-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.hero-panel-icon.purple { background: rgba(99, 102, 241, 0.12); color: var(--primary); }
.hero-panel-icon.green { background: rgba(16, 185, 129, 0.12); color: var(--success); }
.hero-panel-icon.amber { background: rgba(245, 158, 11, 0.12); color: var(--accent); }

.hero-panel-info { flex: 1; min-width: 0; }
.hero-panel-info .title { font-weight: 600; font-size: 0.9rem; color: var(--dark); }
.hero-panel-info .subtitle { font-size: 0.78rem; color: var(--gray-400); }

.hero-panel-status {
  font-size: 0.78rem;
  font-weight: 600;
  flex-shrink: 0;
}

.hero-panel-status.done { color: var(--success); }
.hero-panel-status.free { color: var(--accent); }

/* ── Glow orb decoration ── */
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  opacity: 0.5;
}

.hero-orb-1 {
  width: 300px;
  height: 300px;
  background: var(--primary);
  top: -100px;
  right: -50px;
  opacity: 0.08;
}

.hero-orb-2 {
  width: 200px;
  height: 200px;
  background: var(--secondary);
  bottom: -50px;
  left: 20%;
  opacity: 0.06;
}

/* ============================================================
   SECTION COMMON
   ============================================================ */
.section {
  padding: 4rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--primary-light);
  border: 1px solid rgba(99, 102, 241, 0.12);
  padding: 0.3rem 0.8rem;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  color: var(--dark);
  letter-spacing: -0.03em;
  margin-bottom: 0.6rem;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--gray-500);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ============================================================
   FEATURES GRID
   ============================================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-card:hover {
  border-color: rgba(99, 102, 241, 0.15);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

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

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  margin-bottom: 1rem;
}

.feature-icon.purple { background: rgba(99, 102, 241, 0.1); color: var(--primary); }
.feature-icon.green { background: rgba(16, 185, 129, 0.1); color: var(--success); }
.feature-icon.amber { background: rgba(245, 158, 11, 0.1); color: var(--accent); }
.feature-icon.blue { background: rgba(14, 165, 233, 0.1); color: var(--secondary); }
.feature-icon.rose { background: rgba(244, 63, 94, 0.1); color: #e11d48; }
.feature-icon.cyan { background: rgba(6, 182, 212, 0.1); color: #0891b2; }

.feature-card h5 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 0.4rem;
}

.feature-card p {
  font-size: 0.85rem;
  color: var(--gray-500);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.feature-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: gap 0.2s ease;
}

.feature-link:hover { gap: 0.5rem; color: var(--primary-dark); }

/* ============================================================
   CONVERTER CARD (Main Document Converter)
   ============================================================ */
.converter-card {
  background: var(--surface);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s ease;
}

.converter-card:hover { box-shadow: var(--shadow-md); }

.converter-card-header {
  padding: 1.25rem 1.75rem;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.converter-card-header h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--dark);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
}

.converter-card-body { padding: 1.75rem; }

.upload-zone {
  border: 2px dashed var(--gray-200);
  border-radius: var(--radius-md);
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  background: var(--gray-50);
}

.upload-zone:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.upload-zone.dragover {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.06);
  border-style: solid;
  transform: scale(1.01);
}

.upload-zone-icon {
  width: 56px;
  height: 56px;
  background: rgba(99, 102, 241, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 0.75rem;
  font-size: 1.4rem;
  color: var(--primary);
  transition: transform 0.3s ease;
}

.upload-zone:hover .upload-zone-icon { transform: translateY(-3px); }

.upload-zone h5 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 0.2rem;
}

.upload-zone p {
  font-size: 0.8rem;
  color: var(--gray-400);
  margin-bottom: 0.75rem;
}

/* File card */
.file-card {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.file-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.file-icon {
  width: 36px;
  height: 36px;
  background: rgba(99, 102, 241, 0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1rem;
  flex-shrink: 0;
}

/* Format badges */
.format-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.format-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--gray-100);
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--gray-700);
}

/* Result card */
.result-card {
  text-align: center;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.result-icon {
  width: 48px;
  height: 48px;
  background: rgba(16, 185, 129, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 0.75rem;
  font-size: 1.3rem;
  color: var(--success);
}

/* ============================================================
   FREE TOOL CARDS (Word→PDF, Image→PDF)
   ============================================================ */
.free-tool-card {
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.free-tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 200px;
  height: 200px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 50%;
  transform: translate(50%, -50%);
  pointer-events: none;
}

.free-tool-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: rgba(255, 255, 255, 0.15);
  padding: 0.2rem 0.7rem;
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.free-tool-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.free-tool-card p {
  font-size: 0.85rem;
  opacity: 0.9;
  margin-bottom: 1rem;
  line-height: 1.6;
}

/* ============================================================
   PDF TOOLS CARD
   ============================================================ */
.pdf-tools-card {
  background: var(--surface);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
}

.pdf-tools-card .card-body { padding: 1.75rem; }

/* ============================================================
   CTA SECTION
   ============================================================ */
.cta-section {
  text-align: center;
  background: linear-gradient(135deg, var(--dark) 0%, #1e293b 100%);
  border-radius: var(--radius-xl);
  padding: 3.5rem 2rem;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section h2 {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 0.6rem;
  letter-spacing: -0.02em;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.95rem;
  max-width: 480px;
  margin: 0 auto 1.5rem;
  line-height: 1.7;
}

.cta-section .btn-hero-primary { box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4); }
.cta-section .btn-hero-secondary { border-color: rgba(255, 255, 255, 0.15); color: rgba(255, 255, 255, 0.9); background: rgba(255, 255, 255, 0.06); }
.cta-section .btn-hero-secondary:hover { border-color: rgba(255, 255, 255, 0.3); color: var(--white); background: rgba(255, 255, 255, 0.1); }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.5rem 1.2rem;
  transition: all 0.2s ease;
}

.btn-primary {
  background: var(--primary);
  border: none;
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.btn-success { border: none; }
.btn-success:hover { transform: translateY(-1px); }

.btn-outline-secondary:hover { background: var(--gray-100); }

/* ============================================================
   FORM ELEMENTS
   ============================================================ */
.form-select, .form-control {
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--gray-200);
  font-size: 0.875rem;
  padding: 0.5rem 0.8rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-select:focus, .form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.form-label { font-size: 0.85rem; font-weight: 600; color: var(--gray-700); }
.form-check-label { font-size: 0.85rem; }

/* ============================================================
   PROGRESS
   ============================================================ */
.progress {
  border-radius: 100px;
  height: 6px;
  background: var(--gray-200);
}

.progress-bar {
  background: var(--primary);
  border-radius: 100px;
}

/* ============================================================
   ALERTS
   ============================================================ */
.alert {
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
}

.alert-success { background: #d1fae5; color: #065f46; }
.alert-danger { background: #fee2e2; color: #991b1b; }
.alert-info { background: var(--primary-light); color: var(--primary-dark); }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  border-top: 1px solid var(--gray-200);
  padding: 1.25rem 0;
  background: var(--white);
  margin-top: 3rem;
}

.footer a { color: var(--gray-400); transition: color 0.2s ease; }
.footer a:hover { color: var(--primary); }

/* ============================================================
   ANIMATIONS
   ============================================================ */
.animate-fade-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease forwards;
}

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 992px) {
  .hero { padding: 3.5rem 0 2.5rem; }
  .section { padding: 3rem 0; }
  .hero-stats { justify-content: center; }
  .hero-actions { justify-content: center; }
  .hero-subtitle { text-align: center; margin-left: auto; margin-right: auto; }
  .hero-badge { margin-left: auto; margin-right: auto; }
  .hero-title { text-align: center; }
}

@media (max-width: 768px) {
  .hero { padding: 2.5rem 0 2rem; }
  .hero-title { font-size: 1.8rem; }
  .hero-subtitle { font-size: 0.95rem; }
  .hero-stats { gap: 1.25rem; }
  .hero-stat-value { font-size: 1.2rem; }
  .section { padding: 2.5rem 0; }
  .features-grid { grid-template-columns: 1fr; }
  .converter-card-header { flex-direction: column; align-items: flex-start; }
  .cta-section { padding: 2.5rem 1.5rem; }
  .cta-section h2 { font-size: 1.4rem; }
}

/* ============================================================
   REVISION DASHBOARD
   ============================================================ */
.revision-page { padding: 2rem 0; }

.revision-hero {
  background: linear-gradient(135deg, #f8fafc 0%, #eef2ff 50%, #f0f9ff 100%);
  border-radius: var(--radius-xl);
  padding: 2.5rem 2rem;
  margin-bottom: 2rem;
  position: relative;
  overflow: hidden;
}

.revision-hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 60%;
  height: 140%;
  background: radial-gradient(ellipse, rgba(99, 102, 241, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.revision-hero-content { position: relative; z-index: 1; }

.revision-hero h1 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 800;
  color: var(--dark);
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

.revision-hero p {
  color: var(--gray-500);
  font-size: 0.95rem;
  line-height: 1.7;
  max-width: 600px;
  margin-bottom: 1.25rem;
}

.revision-hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.revision-stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.revision-stat-card {
  background: var(--surface);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: all 0.3s ease;
}

.revision-stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(99, 102, 241, 0.15);
}

.revision-stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.revision-stat-icon.purple { background: rgba(99, 102, 241, 0.1); color: var(--primary); }
.revision-stat-icon.green { background: rgba(16, 185, 129, 0.1); color: var(--success); }
.revision-stat-icon.amber { background: rgba(245, 158, 11, 0.1); color: var(--accent); }
.revision-stat-icon.blue { background: rgba(14, 165, 233, 0.1); color: var(--secondary); }

.revision-stat-value {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--dark);
  line-height: 1.2;
}

.revision-stat-label {
  font-size: 0.82rem;
  color: var(--gray-500);
  font-weight: 500;
}

.revision-section {
  background: var(--surface);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.revision-section-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--gray-100);
}

.revision-section-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.revision-section-icon.purple { background: rgba(99, 102, 241, 0.1); color: var(--primary); }
.revision-section-icon.green { background: rgba(16, 185, 129, 0.1); color: var(--success); }

.revision-section-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--dark);
  margin: 0;
}

.revision-section-badge {
  margin-left: auto;
  background: var(--gray-100);
  color: var(--gray-700);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: 100px;
}

.revision-level-card {
  background: linear-gradient(135deg, #f8fafc, #f1f5f9);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  transition: all 0.3s ease;
}

.revision-level-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(99, 102, 241, 0.15);
}

.revision-level-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.revision-level-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.revision-level-icon.purple { background: linear-gradient(135deg, #6366f1, #4f46e5); color: #fff; }
.revision-level-icon.green { background: linear-gradient(135deg, #10b981, #059669); color: #fff; }

.revision-level-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--dark);
  margin: 0;
}

.revision-level-count {
  font-size: 0.78rem;
  color: var(--gray-400);
  font-weight: 500;
}

.revision-class-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.revision-class-list li { margin-bottom: 0.25rem; }

.revision-class-link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-sm);
  color: var(--gray-700);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s ease;
  text-decoration: none;
}

.revision-class-link:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
  padding-left: 1rem;
}

.revision-class-link i {
  font-size: 0.75rem;
  color: var(--primary);
  transition: transform 0.2s ease;
}

.revision-class-link:hover i { transform: translateX(3px); }

.revision-material-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

.revision-material-row:hover {
  background: var(--gray-50);
  border-color: var(--gray-200);
}

.revision-material-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  background: rgba(99, 102, 241, 0.1);
  color: var(--primary);
}

.revision-material-info { flex: 1; min-width: 0; }

.revision-material-title {
  font-weight: 600;
  color: var(--dark);
  font-size: 0.95rem;
  margin-bottom: 0.15rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.revision-material-meta {
  font-size: 0.8rem;
  color: var(--gray-400);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.revision-material-actions { display: flex; gap: 0.5rem; flex-shrink: 0; }

.revision-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.82rem;
  transition: all 0.2s ease;
  text-decoration: none;
  border: none;
}

.revision-btn-primary {
  background: var(--primary);
  color: var(--white);
}

.revision-btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  color: var(--white);
}

.revision-btn-secondary {
  background: var(--gray-100);
  color: var(--gray-700);
}

.revision-btn-secondary:hover {
  background: var(--gray-200);
  color: var(--gray-900);
}

.revision-btn-success {
  background: linear-gradient(135deg, #10b981, #059669);
  color: var(--white);
}

.revision-btn-success:hover {
  transform: translateY(-1px);
  color: var(--white);
}

.revision-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.3rem 0.65rem;
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 600;
}

.revision-badge.cbe { background: #dbeafe; color: #1e40af; }
.revision-badge.f844 { background: #d1fae5; color: #065f46; }
.revision-badge.free { background: #d1fae5; color: #065f46; }
.revision-badge.paid { background: #fef3c7; color: #92400e; }
.revision-badge.type { background: var(--primary-light); color: var(--primary-dark); }
.revision-badge.muted { background: var(--gray-100); color: var(--gray-700); }

.revision-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.revision-toolbar-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--dark);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.revision-toolbar-title .badge {
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: 100px;
}

.revision-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.revision-card {
  background: var(--surface);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  transition: all 0.3s ease;
  text-decoration: none;
  color: inherit;
  display: block;
}

.revision-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(99, 102, 241, 0.15);
  color: inherit;
}

.revision-card-header {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.revision-card-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  background: rgba(99, 102, 241, 0.1);
  color: var(--primary);
}

.revision-card-title {
  font-weight: 700;
  color: var(--dark);
  font-size: 0.95rem;
  line-height: 1.3;
  margin-bottom: 0.2rem;
}

.revision-card-subtitle {
  font-size: 0.8rem;
  color: var(--gray-400);
}

.revision-card-body {
  font-size: 0.85rem;
  color: var(--gray-500);
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

.revision-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 0.75rem;
  border-top: 1px solid var(--gray-100);
}

.revision-filter-bar {
  display: flex;
  align-items: flex-end;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.revision-filter-bar .form-select,
.revision-filter-bar .form-control {
  min-width: 180px;
}

.revision-empty {
  text-align: center;
  padding: 3rem 1rem;
  background: var(--gray-50);
  border-radius: var(--radius-md);
  border: 1px dashed var(--gray-200);
}

.revision-empty-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-size: 1.5rem;
  background: rgba(245, 158, 11, 0.1);
  color: var(--accent);
}

.revision-empty h6 {
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 0.35rem;
}

.revision-empty p {
  color: var(--gray-500);
  font-size: 0.85rem;
  margin: 0;
}

.revision-detail-header {
  background: var(--surface);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.revision-detail-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.75rem;
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--gray-100);
}

.revision-detail-meta-item {
  background: var(--gray-50);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
}

.revision-detail-meta-item small {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--gray-400);
  display: block;
  margin-bottom: 0.25rem;
}

.revision-detail-meta-item .fw-bold {
  font-size: 0.9rem;
  color: var(--dark);
}

.revision-preview-banner {
  background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  color: var(--white);
  margin-bottom: 1.25rem;
}

.revision-preview-banner h4 {
  font-weight: 700;
  margin-bottom: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.revision-preview-banner p {
  margin: 0;
  opacity: 0.85;
  font-size: 0.9rem;
}

.revision-preview-box {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--gray-700);
  white-space: pre-wrap;
  word-wrap: break-word;
  max-height: 500px;
  overflow-y: auto;
}

.revision-quick-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.75rem;
  margin-top: 1rem;
}

.revision-quick-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.9rem 1rem;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--gray-700);
  font-weight: 600;
  font-size: 0.85rem;
  transition: all 0.2s ease;
}

.revision-quick-link:hover {
  background: var(--primary-light);
  border-color: rgba(99, 102, 241, 0.15);
  color: var(--primary-dark);
}

.revision-quick-link i {
  font-size: 1.1rem;
  color: var(--primary);
}

@media (max-width: 768px) {
  .revision-hero { padding: 1.5rem 1rem; }
  .revision-section { padding: 1.25rem; }
  .revision-material-row { flex-wrap: wrap; }
  .revision-material-actions { width: 100%; justify-content: flex-end; }
  .revision-detail-meta { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 576px) {
  .revision-stat-grid { grid-template-columns: 1fr 1fr; }
  .revision-card-grid { grid-template-columns: 1fr; }
  .revision-toolbar { flex-direction: column; align-items: stretch; }
  .revision-filter-bar { flex-direction: column; }
  .revision-filter-bar .form-select,
  .revision-filter-bar .form-control { width: 100%; }
}

/* Revision dashboard adjustments over base */
.revision-page .breadcrumb { margin-bottom: 0.5rem; }
.revision-page h1 { font-size: 1.4rem; font-weight: 800; color: var(--dark); letter-spacing: -0.02em; }

.revision-page .card { border: 1px solid var(--gray-200); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
.revision-page .card:hover { box-shadow: var(--shadow-md); }

.revision-page .table { margin-bottom: 0; }
.revision-page .table thead th {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--gray-500);
  background: var(--gray-50);
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--gray-200);
}
.revision-page .table tbody td {
  padding: 0.85rem 1rem;
  vertical-align: middle;
  border-bottom: 1px solid var(--gray-100);
  font-size: 0.9rem;
}
.revision-page .table tbody tr:hover { background: var(--gray-50); }