/* ============================================
   HAYDEE AI EDUCATION PLATFORM - MASTER STYLESHEET
   ============================================ */

/* --------------------------------------------
   TABLE OF CONTENTS
   1. CSS Variables & Reset
   2. Typography
   3. Layout Utilities
   4. Header & Navigation
   5. Hero Section
   6. Buttons & Links
   7. Cards & Components
   8. Features Section
   9. AI Teachers Grid
   10. How It Works
   11. Schools Section
   12. Testimonials
   13. Pricing
   14. CTA Section
   15. Footer
   16. About Page
   17. AI Teachers Directory
   18. Pricing Page
   19. Contact Page
   20. FAQ Page
   21. Login Pages
   22. Student Dashboard
   23. Teacher Dashboard
   24. School Dashboard
   25. Admin Dashboard
   26. AI Chat Interface
   27. Animations
   28. Glassmorphism
   29. Responsive
   30. Dark Mode
   -------------------------------------------- */

/* 1. CSS Variables & Reset */
:root {
  --primary: #2563EB;
  --primary-dark: #1D4ED8;
  --primary-light: #3B82F6;
  --secondary: #06B6D4;
  --secondary-dark: #0891B2;
  --accent: #F59E0B;
  --accent-dark: #D97706;
  --bg-white: #FFFFFF;
  --bg-secondary: #F8FAFC;
  --bg-dark: #0F172A;
  --text-dark: #0F172A;
  --text-secondary: #475569;
  --text-light: #94A3B8;
  --success: #10B981;
  --warning: #F59E0B;
  --error: #EF4444;
  --border: #E2E8F0;
  --border-light: #F1F5F9;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 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);
  --shadow-glow: 0 0 20px rgba(37,99,235,0.15);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  --font-primary: 'Poppins', sans-serif;
  --font-secondary: 'Inter', sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --glass-bg: rgba(255,255,255,0.7);
  --glass-border: rgba(255,255,255,0.2);
  --glass-shadow: 0 8px 32px rgba(0,0,0,0.08);
  --sidebar-width: 280px;
  --sidebar-collapsed: 72px;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-secondary);
  color: var(--text-dark);
  background: var(--bg-white);
  line-height: 1.6;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

ul {
  list-style: none;
}

/* 2. Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-dark);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(2rem, 4vw, 3rem); letter-spacing: -0.01em; }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

.section-tag {
  display: inline-block;
  font-family: var(--font-primary);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary);
  background: rgba(37,99,235,0.08);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
}

.text-gradient {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-orange {
  background: linear-gradient(135deg, var(--accent), #EF4444);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 3. Layout Utilities */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-wide {
  max-width: 1400px;
}

.section {
  padding: 100px 0;
  position: relative;
}

.section-sm {
  padding: 60px 0;
}

.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.grid {
  display: grid;
  gap: 30px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-auto { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.gap-sm { gap: 12px; }
.gap-md { gap: 24px; }
.gap-lg { gap: 40px; }

.mt-sm { margin-top: 12px; }
.mt-md { margin-top: 24px; }
.mt-lg { margin-top: 40px; }
.mb-sm { margin-bottom: 12px; }
.mb-md { margin-bottom: 24px; }
.mb-lg { margin-bottom: 40px; }

/* 4. Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
  height: var(--header-height);
}

.header.scrolled {
  background: rgba(255,255,255,0.95);
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--text-dark);
}

.header-logo .logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.2rem;
  font-weight: 700;
}

.header-logo span {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-family: var(--font-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 4px 0;
  transition: var(--transition);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  transition: var(--transition);
  border-radius: 2px;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

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

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: var(--transition);
}

.mobile-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* 5. Hero Section */
.hero {
  min-height: 100vh;
  padding-top: var(--header-height);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #EEF2FF 0%, #F0F9FF 50%, #FFF7ED 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 60px 0;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(37,99,235,0.08);
  border: 1px solid rgba(37,99,235,0.12);
  padding: 8px 20px;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease;
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.hero-title {
  font-size: clamp(2.5rem, 5.5vw, 4.2rem);
  font-weight: 800;
  line-height: 1.05;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
  animation: fadeInUp 0.6s ease 0.1s both;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 520px;
  margin-bottom: 32px;
  animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  animation: fadeInUp 0.6s ease 0.3s both;
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  animation: fadeInUp 0.6s ease 0.4s both;
}

.hero-stat h3 {
  font-size: 1.75rem;
  color: var(--primary);
  margin-bottom: 4px;
}

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

.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.8s ease 0.3s both;
}

.hero-robot {
  width: 100%;
  max-width: 400px;
  aspect-ratio: 1;
  background: linear-gradient(135deg, var(--primary-light), var(--secondary));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 8rem;
  color: white;
  position: relative;
  box-shadow: 0 40px 80px rgba(37,99,235,0.25);
  animation: float 6s ease-in-out infinite;
}

.hero-floating-card {
  position: absolute;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  font-weight: 500;
  animation: float 5s ease-in-out infinite;
  white-space: nowrap;
  border: 1px solid rgba(255,255,255,0.3);
}

.hero-floating-card .card-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.hero-floating-card:nth-child(2) { top: 10%; right: -10%; animation-delay: 0.5s; }
.hero-floating-card:nth-child(3) { bottom: 15%; left: -10%; animation-delay: 1s; }
.hero-floating-card:nth-child(4) { bottom: 5%; right: 5%; animation-delay: 1.5s; }

.hero-shapes {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-shape {
  position: absolute;
  border-radius: 50%;
  opacity: 0.08;
}

.hero-shape:nth-child(1) {
  width: 600px;
  height: 600px;
  background: var(--primary);
  top: -200px;
  right: -200px;
}

.hero-shape:nth-child(2) {
  width: 400px;
  height: 400px;
  background: var(--secondary);
  bottom: -100px;
  left: -100px;
}

.hero-shape:nth-child(3) {
  width: 200px;
  height: 200px;
  background: var(--accent);
  top: 50%;
  right: 20%;
}

/* 6. Buttons & Links */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-family: var(--font-primary);
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: var(--transition);
}

.btn:hover::after {
  background: rgba(255,255,255,0.1);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  box-shadow: 0 4px 14px rgba(37,99,235,0.35);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(37,99,235,0.45);
  transform: translateY(-2px);
}

.btn-secondary {
  background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
  color: white;
  box-shadow: 0 4px 14px rgba(6,182,212,0.35);
}

.btn-secondary:hover {
  box-shadow: 0 6px 20px rgba(6,182,212,0.45);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: white;
  transform: translateY(-2px);
}

.btn-ghost {
  background: rgba(37,99,235,0.08);
  color: var(--primary);
}

.btn-ghost:hover {
  background: rgba(37,99,235,0.15);
  transform: translateY(-2px);
}

.btn-white {
  background: white;
  color: var(--primary);
  box-shadow: var(--shadow-md);
}

.btn-white:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.btn-sm { padding: 8px 18px; font-size: 0.85rem; }
.btn-lg { padding: 16px 36px; font-size: 1.05rem; }
.btn-xl { padding: 20px 44px; font-size: 1.1rem; }

.btn-icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: var(--radius-sm);
}

.btn-icon.btn-sm { width: 36px; height: 36px; font-size: 0.9rem; }

/* 7. Cards & Components */
.card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.card-hover {
  cursor: pointer;
}

.card-hover:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-6px);
}

.card-glass {
  background: rgba(255,255,255,0.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.3);
  box-shadow: var(--glass-shadow);
}

.card-glass:hover {
  background: rgba(255,255,255,0.8);
  box-shadow: var(--shadow-lg);
}

.card-image {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.card-body {
  padding: 24px;
}

.card-body-sm {
  padding: 16px;
}

/* 8. Features Section */
.features {
  background: var(--bg-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 60px;
}

.feature-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  background: rgba(37,99,235,0.08);
  color: var(--primary);
}

.feature-card h4 {
  margin-bottom: 8px;
  font-size: 1.15rem;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* 9. AI Teachers Grid */
.teachers-section {
  background: var(--bg-white);
}

.teachers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 60px;
}

.teacher-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
  position: relative;
}

.teacher-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.teacher-card-header {
  padding: 24px 24px 16px;
  text-align: center;
  position: relative;
}

.teacher-card-header .teacher-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  box-shadow: var(--shadow-md);
}

.teacher-card-header h4 {
  font-size: 1.15rem;
  margin-bottom: 4px;
}

.teacher-card-header .teacher-subject {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.teacher-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-free {
  background: rgba(16,185,129,0.1);
  color: var(--success);
}

.badge-premium {
  background: rgba(245,158,11,0.1);
  color: var(--accent);
}

.badge-new {
  background: rgba(37,99,235,0.1);
  color: var(--primary);
}

.teacher-card-body {
  padding: 0 24px 16px;
}

.teacher-card-body p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.teacher-card-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.teacher-card-footer .btn {
  flex: 1;
}

.teacher-fav {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  cursor: pointer;
  color: var(--text-light);
  transition: var(--transition);
  font-size: 1rem;
}

.teacher-fav:hover,
.teacher-fav.active {
  color: var(--error);
  border-color: var(--error);
}

/* 10. How It Works */
.how-it-works {
  background: var(--bg-secondary);
  position: relative;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
  margin-top: 60px;
  position: relative;
}

.timeline-step {
  text-align: center;
  position: relative;
}

.timeline-number {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-primary);
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto 20px;
  box-shadow: 0 8px 24px rgba(37,99,235,0.2);
}

.timeline-icon {
  font-size: 2rem;
  margin-bottom: 16px;
  display: block;
}

.timeline-step h4 {
  margin-bottom: 8px;
  font-size: 1.1rem;
}

.timeline-step p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

.timeline-connector {
  display: none;
}

/* 11. Schools Section */
.schools-section {
  background: linear-gradient(135deg, #EEF2FF 0%, #F0F9FF 100%);
}

.schools-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.schools-preview {
  position: relative;
}

.schools-preview-img {
  width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border);
}

.schools-features {
  margin-top: 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.schools-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  font-weight: 500;
}

.schools-feature-item .check {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(16,185,129,0.1);
  color: var(--success);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  flex-shrink: 0;
}

/* 12. Testimonials */
.testimonials {
  background: var(--bg-white);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  margin-top: 60px;
}

.testimonial-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
}

.testimonial-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.testimonial-stars {
  color: var(--accent);
  font-size: 1rem;
  margin-bottom: 16px;
}

.testimonial-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 24px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: white;
  font-size: 1rem;
}

.testimonial-name {
  font-weight: 600;
  font-size: 0.95rem;
}

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

/* 13. Pricing */
.pricing-section {
  background: var(--bg-secondary);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-top: 60px;
}

.pricing-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  transition: var(--transition);
  position: relative;
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.pricing-card.featured {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(37,99,235,0.1), var(--shadow-lg);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
}

.pricing-badge {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translate(-50%, -50%);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  padding: 6px 20px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
}

.pricing-card h4 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}

.pricing-card .pricing-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.pricing-amount {
  margin-bottom: 24px;
}

.pricing-amount .amount {
  font-family: var(--font-primary);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-dark);
}

.pricing-amount .period {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.pricing-features {
  margin-bottom: 32px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.pricing-features li .check {
  color: var(--success);
  flex-shrink: 0;
}

/* 14. CTA Section */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, #1D4ED8 50%, var(--secondary) 100%);
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.cta-content {
  text-align: center;
  position: relative;
  z-index: 1;
}

.cta-content h2 {
  color: white;
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 16px;
}

.cta-content p {
  color: rgba(255,255,255,0.85);
  font-size: 1.15rem;
  margin-bottom: 36px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.cta-buttons .btn-white:hover {
  background: var(--bg-secondary);
}

/* 15. Footer */
.footer {
  background: var(--bg-dark);
  color: white;
  padding: 80px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-about .header-logo {
  margin-bottom: 16px;
}

.footer-about .header-logo span {
  color: white;
  -webkit-text-fill-color: white;
}

.footer-about p {
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 360px;
  margin-bottom: 24px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.6);
  transition: var(--transition);
  font-size: 1.1rem;
}

.footer-social a:hover {
  background: var(--primary);
  color: white;
}

.footer h5 {
  color: white;
  font-size: 1rem;
  margin-bottom: 20px;
  font-family: var(--font-secondary);
  font-weight: 600;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: rgba(255,255,255,0.5);
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: white;
  padding-left: 4px;
}

.footer-newsletter p {
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
  margin-bottom: 16px;
  line-height: 1.7;
}

.footer-newsletter-form {
  display: flex;
  gap: 8px;
}

.footer-newsletter-form input {
  flex: 1;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.06);
  color: white;
  font-family: var(--font-secondary);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
}

.footer-newsletter-form input::placeholder {
  color: rgba(255,255,255,0.35);
}

.footer-newsletter-form input:focus {
  border-color: rgba(255,255,255,0.3);
  background: rgba(255,255,255,0.1);
}

.footer-bottom {
  text-align: center;
  padding: 24px 0;
  color: rgba(255,255,255,0.35);
  font-size: 0.85rem;
}

/* 16. About Page */
.about-hero {
  padding: 140px 0 80px;
  background: linear-gradient(135deg, #EEF2FF 0%, #F0F9FF 100%);
  text-align: center;
}

.about-hero h1 {
  margin-bottom: 16px;
}

.about-hero p {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 600px;
  margin: 0 auto;
}

.about-story {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-image {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.about-mission-vision {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.mission-card {
  padding: 40px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-white);
  transition: var(--transition);
}

.mission-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.mission-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.value-card {
  text-align: center;
  padding: 32px 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.value-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.value-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin: 0 auto 16px;
}

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}

.tech-badge {
  padding: 10px 24px;
  border-radius: var(--radius-full);
  background: var(--bg-white);
  border: 1px solid var(--border);
  font-weight: 500;
  font-size: 0.9rem;
  transition: var(--transition);
}

.tech-badge:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--shadow-md);
}

/* 17. AI Teachers Directory */
.directory-hero {
  padding: 140px 0 60px;
  background: linear-gradient(135deg, #EEF2FF 0%, #F0F9FF 100%);
  text-align: center;
}

.directory-search {
  max-width: 600px;
  margin: 32px auto 0;
  position: relative;
}

.directory-search input {
  width: 100%;
  padding: 16px 24px 16px 52px;
  border-radius: var(--radius-lg);
  border: 2px solid var(--border);
  font-family: var(--font-secondary);
  font-size: 1rem;
  outline: none;
  transition: var(--transition);
  background: var(--bg-white);
}

.directory-search input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(37,99,235,0.08);
}

.directory-search .search-icon {
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
  font-size: 1.1rem;
}

.directory-filters {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
  justify-content: center;
}

.filter-btn {
  padding: 8px 20px;
  border-radius: var(--radius-full);
  background: var(--bg-white);
  border: 1px solid var(--border);
  font-family: var(--font-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-secondary);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.directory-sidebar {
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

/* 18. Pricing Page */
.pricing-hero {
  padding: 140px 0 60px;
  background: linear-gradient(135deg, #EEF2FF 0%, #F0F9FF 100%);
  text-align: center;
}

.pricing-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 32px;
}

.toggle-switch {
  width: 48px;
  height: 26px;
  background: var(--border);
  border-radius: 13px;
  position: relative;
  cursor: pointer;
  transition: var(--transition);
}

.toggle-switch.active {
  background: var(--primary);
}

.toggle-switch .toggle-knob {
  width: 22px;
  height: 22px;
  background: white;
  border-radius: 50%;
  position: absolute;
  top: 2px;
  left: 2px;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.toggle-switch.active .toggle-knob {
  left: 24px;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 40px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
}

.comparison-table th {
  background: var(--bg-secondary);
  padding: 20px 16px;
  font-family: var(--font-primary);
  font-weight: 600;
  font-size: 0.95rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.comparison-table td {
  padding: 16px;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

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

.comparison-table .feature-name {
  font-weight: 600;
  color: var(--text-dark);
}

.comparison-table .check {
  color: var(--success);
}

.comparison-table .cross {
  color: var(--text-light);
}

/* 19. Contact Page */
.contact-hero {
  padding: 140px 0 60px;
  background: linear-gradient(135deg, #EEF2FF 0%, #F0F9FF 100%);
  text-align: center;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contact-form-wrap {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 48px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 8px;
  color: var(--text-dark);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  font-family: var(--font-secondary);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition);
  background: var(--bg-white);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(37,99,235,0.08);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-info-wrap {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-info-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: var(--transition);
}

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

.contact-info-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-info-card h5 {
  margin-bottom: 4px;
  font-size: 1rem;
}

.contact-info-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

.contact-map {
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--border);
  height: 300px;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
}

/* 20. FAQ Page */
.faq-hero {
  padding: 140px 0 60px;
  background: linear-gradient(135deg, #EEF2FF 0%, #F0F9FF 100%);
  text-align: center;
}

.faq-search {
  max-width: 600px;
  margin: 32px auto 0;
  position: relative;
}

.faq-search input {
  width: 100%;
  padding: 16px 24px 16px 52px;
  border-radius: var(--radius-lg);
  border: 2px solid var(--border);
  font-family: var(--font-secondary);
  font-size: 1rem;
  outline: none;
  transition: var(--transition);
  background: var(--bg-white);
}

.faq-search input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(37,99,235,0.08);
}

.faq-search .search-icon {
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
}

.faq-categories {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 24px;
}

.faq-accordion {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: var(--primary);
}

.faq-question {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
  background: var(--bg-white);
}

.faq-question:hover {
  background: var(--bg-secondary);
}

.faq-question .faq-toggle {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  color: var(--text-light);
  flex-shrink: 0;
}

.faq-item.active .faq-question {
  background: var(--bg-secondary);
}

.faq-item.active .faq-toggle {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: var(--transition);
}

.faq-answer-inner {
  padding: 0 24px 20px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
}

/* 21. Login Pages */
.login-page {
  min-height: 100vh;
  display: flex;
  background: linear-gradient(135deg, #EEF2FF 0%, #F0F9FF 50%, #FFF7ED 100%);
}

.login-left {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  position: relative;
  overflow: hidden;
}

.login-left-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  opacity: 0.05;
}

.login-card {
  width: 100%;
  max-width: 440px;
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: var(--radius-xl);
  padding: 48px 40px;
  box-shadow: var(--shadow-xl);
  position: relative;
}

.login-card .header-logo {
  justify-content: center;
  margin-bottom: 32px;
}

.login-card h3 {
  text-align: center;
  margin-bottom: 8px;
}

.login-card .login-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 32px;
}

.login-type-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
  background: var(--bg-secondary);
  padding: 4px;
  border-radius: var(--radius-sm);
}

.login-type-tab {
  flex: 1;
  padding: 8px 12px;
  border-radius: 6px;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-secondary);
  background: none;
  border: none;
}

.login-type-tab.active {
  background: var(--bg-white);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.login-right {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  background: linear-gradient(135deg, #EEF2FF 0%, #F0F9FF 100%);
  position: relative;
  overflow: hidden;
}

.login-right-content {
  text-align: center;
  max-width: 400px;
}

.login-right-content .robot-icon {
  font-size: 8rem;
  margin-bottom: 32px;
  display: block;
  animation: float 6s ease-in-out infinite;
}

.login-right-content h2 {
  margin-bottom: 12px;
}

.login-right-content p {
  color: var(--text-secondary);
  line-height: 1.7;
}

.login-features {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 32px;
  text-align: left;
}

.login-feature {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
}

.login-feature .lf-icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
}

/* 22-25. Dashboards Shared Styles */
.dashboard-layout {
  display: flex;
  min-height: 100vh;
  background: var(--bg-secondary);
}

.dashboard-sidebar {
  width: var(--sidebar-width);
  background: var(--bg-white);
  border-right: 1px solid var(--border);
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  overflow-y: auto;
}

.dashboard-sidebar::-webkit-scrollbar {
  width: 4px;
}

.dashboard-sidebar::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

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

.sidebar-toggle {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition);
}

.sidebar-toggle:hover {
  background: var(--bg-secondary);
}

.sidebar-user {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: white;
  font-size: 1rem;
  flex-shrink: 0;
}

.sidebar-user-info h6 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.sidebar-user-info p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.sidebar-nav {
  flex: 1;
  padding: 12px 12px;
}

.sidebar-nav-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-light);
  padding: 16px 12px 8px;
}

.sidebar-nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  cursor: pointer;
  margin-bottom: 2px;
  text-decoration: none;
}

.sidebar-nav-item:hover {
  background: rgba(37,99,235,0.06);
  color: var(--primary);
}

.sidebar-nav-item.active {
  background: rgba(37,99,235,0.1);
  color: var(--primary);
  font-weight: 600;
}

.sidebar-nav-item .nav-icon {
  width: 20px;
  text-align: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.sidebar-nav-item .nav-badge {
  margin-left: auto;
  background: var(--primary);
  color: white;
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-weight: 600;
}

.dashboard-main {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
}

.dashboard-topbar {
  height: var(--header-height);
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.dashboard-topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.dashboard-topbar-left h5 {
  font-size: 1.1rem;
}

.dashboard-topbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.topbar-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
  font-size: 1.1rem;
}

.topbar-btn:hover {
  background: var(--bg-secondary);
}

.topbar-btn .dot {
  width: 8px;
  height: 8px;
  background: var(--error);
  border-radius: 50%;
  position: absolute;
  top: 8px;
  right: 8px;
}

.dashboard-content {
  padding: 32px;
}

.dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
  flex-wrap: wrap;
  gap: 16px;
}

.dashboard-header h2 {
  font-size: 1.5rem;
}

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

/* Dashboard Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition);
}

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

.stat-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.stat-card h3 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 4px;
}

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

.stat-change {
  font-size: 0.85rem;
  font-weight: 600;
}

.stat-change.up { color: var(--success); }
.stat-change.down { color: var(--error); }

/* Dashboard Widgets */
.widget-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 24px;
  margin-bottom: 32px;
}

.widget {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

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

.widget-header h5 {
  font-size: 1rem;
  font-weight: 600;
}

.widget-body {
  padding: 24px;
}

/* Activity Items */
.activity-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
}

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

.activity-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-top: 6px;
  flex-shrink: 0;
}

.activity-content {
  flex: 1;
}

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

.activity-content p strong {
  color: var(--text-dark);
}

.activity-time {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-top: 4px;
}

/* Quick Actions Grid */
.quick-actions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.quick-action-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 24px 16px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-white);
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}

.quick-action-btn:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.quick-action-btn .qa-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.quick-action-btn span {
  font-size: 0.9rem;
  font-weight: 600;
}

/* Progress Cards */
.progress-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.progress-card:hover {
  box-shadow: var(--shadow-sm);
}

.progress-circle {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
  flex-shrink: 0;
}

.progress-info h6 {
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.progress-info p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* AI Teacher recommendations */
.recommended-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.recommended-card {
  text-align: center;
  padding: 20px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--bg-white);
  cursor: pointer;
  transition: var(--transition);
}

.recommended-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.recommended-card .rc-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin: 0 auto 12px;
}

.recommended-card h6 {
  font-size: 0.9rem;
  margin-bottom: 4px;
}

.recommended-card p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Chat list in dashboards */
.chat-list-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.chat-list-item:hover {
  background: var(--bg-secondary);
}

.chat-list-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.chat-list-info {
  flex: 1;
  min-width: 0;
}

.chat-list-info h6 {
  font-size: 0.85rem;
  margin-bottom: 2px;
}

.chat-list-info p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-list-time {
  font-size: 0.75rem;
  color: var(--text-light);
  flex-shrink: 0;
}

/* Continue Learning */
.continue-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.continue-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
}

.continue-item:hover {
  border-color: var(--primary);
  background: rgba(37,99,235,0.03);
}

.continue-item .ci-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;
}

.continue-item .ci-info h6 {
  font-size: 0.9rem;
  margin-bottom: 2px;
}

.continue-item .ci-info p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.continue-item .ci-progress {
  margin-left: auto;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
}

/* Students list for teacher dashboard */
.student-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-light);
}

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

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

.data-table th {
  text-align: left;
  padding: 12px 16px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-light);
  border-bottom: 2px solid var(--border);
}

.data-table td {
  padding: 12px 16px;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}

.data-table td:first-child {
  color: var(--text-dark);
  font-weight: 500;
}

.status-badge {
  display: inline-flex;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
}

.status-active {
  background: rgba(16,185,129,0.1);
  color: var(--success);
}

.status-pending {
  background: rgba(245,158,11,0.1);
  color: var(--accent);
}

.status-inactive {
  background: rgba(239,68,68,0.1);
  color: var(--error);
}

/* Chart placeholder */
.chart-placeholder {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, rgba(37,99,235,0.03), rgba(6,182,212,0.03));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-size: 0.9rem;
  border: 1px dashed var(--border);
}

/* 26. AI Chat Interface */
.chat-interface {
  display: flex;
  height: 100vh;
  background: var(--bg-white);
}

.chat-sidebar {
  width: 320px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

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

.chat-sidebar-header h5 {
  font-size: 1rem;
}

.chat-new-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--primary);
  color: white;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: var(--transition);
}

.chat-new-btn:hover {
  background: var(--primary-dark);
}

.chat-sidebar-search {
  padding: 12px 16px;
  position: relative;
}

.chat-sidebar-search input {
  width: 100%;
  padding: 8px 12px 8px 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  font-size: 0.85rem;
  font-family: var(--font-secondary);
  outline: none;
  background: var(--bg-white);
  transition: var(--transition);
}

.chat-sidebar-search input:focus {
  border-color: var(--primary);
}

.chat-sidebar-search .css-icon {
  position: absolute;
  left: 24px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
  font-size: 0.9rem;
}

.chat-sidebar-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.chat-sidebar-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 2px;
}

.chat-sidebar-item:hover {
  background: rgba(37,99,235,0.06);
}

.chat-sidebar-item.active {
  background: rgba(37,99,235,0.1);
}

.chat-sidebar-item .csi-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.chat-sidebar-item .csi-info {
  flex: 1;
  min-width: 0;
}

.chat-sidebar-item .csi-info h6 {
  font-size: 0.85rem;
  font-weight: 600;
}

.chat-sidebar-item .csi-info p {
  font-size: 0.78rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-sidebar-item .csi-time {
  font-size: 0.7rem;
  color: var(--text-light);
  flex-shrink: 0;
}

.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.chat-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-white);
}

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

.chat-teacher-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: white;
}

.chat-teacher-info h6 {
  font-size: 0.95rem;
  font-weight: 600;
}

.chat-teacher-info p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

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

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px 32px;
  background: var(--bg-secondary);
}

.chat-messages-inner {
  max-width: 800px;
  margin: 0 auto;
}

.message {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  animation: fadeInUp 0.3s ease;
}

.message-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  margin-top: 4px;
}

.message-bubble {
  flex: 1;
  max-width: 75%;
}

.message.user {
  flex-direction: row-reverse;
}

.message.user .message-bubble {
  text-align: right;
}

.message-bubble .msg-text {
  display: inline-block;
  background: var(--bg-white);
  padding: 12px 18px;
  border-radius: var(--radius-lg);
  font-size: 0.95rem;
  line-height: 1.6;
  box-shadow: var(--shadow-sm);
  text-align: left;
}

.message.user .message-bubble .msg-text {
  background: var(--primary);
  color: white;
  border-bottom-right-radius: 4px;
}

.message.bot .message-bubble .msg-text {
  border-bottom-left-radius: 4px;
}

.message-bubble .msg-time {
  font-size: 0.75rem;
  color: var(--text-light);
  margin-top: 4px;
  padding: 0 4px;
}

.typing-indicator {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 12px 18px;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  border-bottom-left-radius: 4px;
  box-shadow: var(--shadow-sm);
  width: fit-content;
}

.typing-indicator span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-light);
  animation: typingDot 1.4s infinite ease-in-out;
}

.typing-indicator span:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
  animation-delay: 0.4s;
}

.chat-input-area {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  background: var(--bg-white);
}

.chat-input-wrapper {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  gap: 12px;
  align-items: flex-end;
}

.chat-input-box {
  flex: 1;
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 8px 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-white);
  transition: var(--transition);
}

.chat-input-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.08);
}

.chat-input-box textarea {
  flex: 1;
  border: none;
  outline: none;
  font-family: var(--font-secondary);
  font-size: 0.95rem;
  resize: none;
  max-height: 120px;
  padding: 4px 0;
  background: transparent;
  line-height: 1.5;
}

.chat-input-actions {
  display: flex;
  gap: 4px;
}

.chat-input-action {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  border: none;
  background: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  transition: var(--transition);
  font-size: 1rem;
}

.chat-input-action:hover {
  background: var(--bg-secondary);
  color: var(--text-secondary);
}

.chat-send-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: var(--transition);
  flex-shrink: 0;
}

.chat-send-btn:hover {
  background: var(--primary-dark);
  transform: scale(1.05);
}

.chat-send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.chat-right-sidebar {
  width: 300px;
  background: var(--bg-white);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow-y: auto;
}

.chat-right-section {
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

.chat-right-section h6 {
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.suggested-questions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.suggested-q {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
  background: var(--bg-white);
  color: var(--text-secondary);
  text-align: left;
}

.suggested-q:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(37,99,235,0.03);
}

.quick-actions-chat {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.quick-action-chat-btn {
  padding: 12px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-white);
  cursor: pointer;
  text-align: center;
  transition: var(--transition);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.quick-action-chat-btn .qac-icon {
  font-size: 1.2rem;
  display: block;
  margin-bottom: 4px;
}

.quick-action-chat-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.knowledge-files-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.knowledge-file {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.85rem;
}

.knowledge-file:hover {
  background: var(--bg-secondary);
}

.knowledge-file .kf-icon {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  flex-shrink: 0;
}

.knowledge-file .kf-name {
  flex: 1;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 27. Animations */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

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

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

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

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes typingDot {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

@keyframes slideIn {
  from { transform: translateX(-100%); }
  to { transform: translateX(0); }
}

@keyframes scaleIn {
  from { transform: scale(0.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 28. Glassmorphism */
.glass {
  background: rgba(255,255,255,0.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.3);
  box-shadow: 0 8px 32px rgba(0,0,0,0.06);
}

.glass-strong {
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.2);
  box-shadow: 0 8px 32px rgba(0,0,0,0.1);
}

/* 29. Responsive Design */
@media (max-width: 1200px) {
  .hero-grid {
    gap: 40px;
  }

  .chat-right-sidebar {
    display: none;
  }

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

@media (max-width: 1024px) {
  .dashboard-sidebar {
    width: var(--sidebar-collapsed);
  }

  .dashboard-sidebar .sidebar-user-info,
  .dashboard-sidebar .sidebar-nav-label,
  .dashboard-sidebar .sidebar-nav-item span:not(.nav-icon),
  .dashboard-sidebar .nav-badge {
    display: none;
  }

  .dashboard-sidebar .sidebar-nav-item {
    justify-content: center;
    padding: 12px;
  }

  .dashboard-sidebar .sidebar-header .header-logo span {
    display: none;
  }

  .dashboard-main {
    margin-left: var(--sidebar-collapsed);
  }

  .dashboard-sidebar:hover {
    width: var(--sidebar-width);
  }

  .dashboard-sidebar:hover .sidebar-user-info,
  .dashboard-sidebar:hover .sidebar-nav-label,
  .dashboard-sidebar:hover .sidebar-nav-item span:not(.nav-icon),
  .dashboard-sidebar:hover .nav-badge {
    display: block;
  }

  .dashboard-sidebar:hover .sidebar-nav-item {
    justify-content: flex-start;
    padding: 10px 14px;
  }

  .dashboard-sidebar:hover .sidebar-header .header-logo span {
    display: inline;
  }

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

  .about-story {
    grid-template-columns: 1fr;
  }

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

  .chat-sidebar {
    width: 260px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  .nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border);
    padding: 20px 24px;
    flex-direction: column;
    gap: 16px;
    box-shadow: var(--shadow-lg);
    z-index: 999;
  }

  .nav.open {
    display: flex;
  }

  .mobile-toggle {
    display: flex;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .hero-visual {
    display: none;
  }

  .section {
    padding: 60px 0;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .pricing-card.featured {
    transform: none;
  }

  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .login-page {
    flex-direction: column;
  }

  .login-right {
    display: none;
  }

  .dashboard-sidebar {
    width: 0;
    transform: translateX(-100%);
  }

  .dashboard-sidebar.open {
    width: var(--sidebar-width);
    transform: translateX(0);
  }

  .dashboard-main {
    margin-left: 0;
  }

  .dashboard-content {
    padding: 20px 16px;
  }

  .dashboard-topbar {
    padding: 0 16px;
  }

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

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

  .chat-interface {
    flex-direction: column;
  }

  .chat-sidebar {
    width: 100%;
    max-height: 200px;
  }

  .chat-messages {
    padding: 16px;
  }

  .message-bubble {
    max-width: 90%;
  }

  .comparison-table {
    font-size: 0.85rem;
  }

  .contact-form-wrap {
    padding: 24px;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
  }

  .schools-features {
    grid-template-columns: 1fr;
  }

  .teachers-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  }

  .hero-stats {
    flex-wrap: wrap;
    gap: 24px;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .hero-buttons .btn {
    width: 100%;
  }

  .chat-input-wrapper {
    flex-direction: column;
    gap: 8px;
  }

  .chat-send-btn {
    width: 100%;
    border-radius: var(--radius-sm);
  }

  .cta-buttons {
    flex-direction: column;
  }

  .cta-buttons .btn {
    width: 100%;
  }

  .footer-newsletter-form {
    flex-direction: column;
  }

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

  .quick-actions-grid {
    grid-template-columns: 1fr 1fr;
  }

  .quick-actions-chat {
    grid-template-columns: 1fr;
  }
}

/* 30. Dark Mode (optional, for dashboard) */
.dark-mode {
  --bg-white: #1E293B;
  --bg-secondary: #0F172A;
  --text-dark: #F1F5F9;
  --text-secondary: #94A3B8;
  --border: #334155;
  --border-light: #1E293B;
}

.dark-mode .header {
  background: rgba(15,23,42,0.85);
  border-color: #1E293B;
}

.dark-mode .nav-link {
  color: #94A3B8;
}

.dark-mode .hero {
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #0F172A 100%);
}

.dark-mode .features {
  background: #0F172A;
}

.dark-mode .testimonial-card {
  background: #1E293B;
}

.dark-mode .dashboard-sidebar {
  background: #1E293B;
  border-color: #334155;
}