/* ============================================
   AI Page - Modern Design & Theme System
   ============================================ */

:root {
  /* AI Page Color Variables */
  --ai-primary: #6366f1;
  --ai-primary-light: #818cf8;
  --ai-primary-dark: #4f46e5;
  --ai-secondary: #ec4899;
  --ai-accent: #14b8a6;
  --ai-gradient-1: linear-gradient(135deg, #6366f1 0%, #ec4899 100%);
  --ai-gradient-2: linear-gradient(135deg, #14b8a6 0%, #06b6d4 100%);
  --ai-gradient-3: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);

  /* Typography */
  --font-family-heading: "Poppins", "Inter", sans-serif;

  /* Spacing - Extended */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 20px 40px rgba(99, 102, 241, 0.2);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;
  --radius-full: 9999px;
}

/* Light Theme */
[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f5f7ff;
  --bg-tertiary: #eef2ff;
  --text-primary: #1e1b4b;
  --text-secondary: #3730a3;
  --text-tertiary: #6366f1;
  --border-color: #ddd6fe;
  --border-color-light: #ede9fe;
}

/* Dark Theme */
[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-tertiary: #94a3b8;
  --border-color: #334155;
  --border-color-light: #1e293b;
}

/* Apply defaults */
body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition:
    background-color var(--transition-normal),
    color var(--transition-normal);
}

/* ============================================
   Hero Section - Redesigned
   ============================================ */

.hero {
  background: var(--ai-gradient-1);
  color: white;
  padding: 5rem 2rem;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='100' height='100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M20 20 L80 80 M80 20 L20 80' stroke='white' stroke-width='0.5' opacity='0.1'/%3E%3C/svg%3E");
  opacity: 0.5;
  animation: slideBackground 20s linear infinite;
}

@keyframes slideBackground {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(100px);
  }
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
}

.hero-title {
  font-family: var(--font-family-heading);
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 800;
  margin-bottom: var(--space-4);
  animation: slideInUp 0.8s ease-out;
}

.hero-subtitle {
  font-size: clamp(1rem, 3vw, 1.3rem);
  line-height: 1.8;
  opacity: 0.95;
  animation: slideInUp 0.8s ease-out 0.2s backwards;
  max-width: 700px;
  margin: 0 auto;
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   Section Styling - Enhanced
   ============================================ */

.intro-section,
.section {
  padding: var(--space-16) var(--space-6);
  transition: all var(--transition-normal);
}

.section-title {
  font-family: var(--font-family-heading);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  text-align: center;
  margin-bottom: var(--space-6);
  color: var(--ai-primary);
  position: relative;
  display: inline-block;
  width: 100%;
}

.section-subtitle {
  text-align: center;
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-12);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

/* ============================================
   AI Cards - Modern Design
   ============================================ */

.grid-responsive {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-8);
  max-width: 1300px;
  margin: 0 auto;
}

.ai-card {
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.08);
}

.ai-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--ai-gradient-1);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
}

.ai-card:hover {
  transform: translateY(-10px);
  border-color: var(--ai-primary);
  box-shadow: var(--shadow-hover);
  background: var(--bg-primary);
}

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

.ai-card-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.ai-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  flex-shrink: 0;
  transition: all var(--transition-normal);
}

.ai-icon.brain {
  background: linear-gradient(135deg, #6366f1 0%, #a78bfa 100%);
  color: white;
}

.ai-icon.learning {
  background: linear-gradient(135deg, #14b8a6 0%, #06b6d4 100%);
  color: white;
}

.ai-icon.neural {
  background: linear-gradient(135deg, #ec4899 0%, #f59e0b 100%);
  color: white;
}

.ai-icon.tools {
  background: linear-gradient(135deg, #ef4444 0%, #f97316 100%);
  color: white;
}

.ai-card:hover .ai-icon {
  transform: scale(1.1) rotate(5deg);
}

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

.ai-card-info h3 {
  font-family: var(--font-family-heading);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
  color: var(--text-primary);
}

.ai-card-level {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: white;
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  box-shadow: 0 2px 6px rgba(99, 102, 241, 0.2);
}

.ai-card-description {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-6);
  flex-grow: 1;
}

.ai-card-features {
  list-style: none;
  padding: 0;
  margin-bottom: var(--space-6);
}

.ai-card-features li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.ai-card-features i {
  color: var(--ai-primary);
  width: 20px;
  font-size: 1rem;
  flex-shrink: 0;
}

.ai-card:hover .ai-card-features li {
  transform: translateX(4px);
}

.ai-card-cta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--ai-primary);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.cta-arrow {
  transition: transform var(--transition-fast);
}

.ai-card:hover .cta-arrow {
  transform: translateX(4px);
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
  .hero {
    padding: 3rem 1.5rem;
    min-height: 50vh;
  }

  .hero-title {
    margin-bottom: var(--space-3);
  }

  .intro-section,
  .section {
    padding: var(--space-12) var(--space-4);
  }

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

  .ai-card {
    padding: var(--space-6);
  }

  .ai-icon {
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
  }

  .ai-card-info h3 {
    font-size: 1.1rem;
  }

  .section-title {
    margin-bottom: var(--space-4);
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 2rem 1rem;
    min-height: 45vh;
  }

  .hero-title {
    font-size: 1.5rem;
  }

  .hero-subtitle {
    font-size: 0.95rem;
  }

  .intro-section,
  .section {
    padding: var(--space-8) var(--space-3);
  }

  .ai-card {
    padding: var(--space-4);
  }

  .section-title {
    font-size: 1.5rem;
  }

  .section-subtitle {
    font-size: 0.95rem;
  }

  .ai-card-description {
    font-size: 0.85rem;
  }

  .ai-card-features li {
    font-size: 0.8rem;
    gap: var(--space-2);
  }
}

/* ============================================
   Animation Classes
   ============================================ */

.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease-out forwards;
}

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

/* Stagger animation for grid items */
.grid-responsive > .ai-card:nth-child(1) {
  animation-delay: 0.1s;
}
.grid-responsive > .ai-card:nth-child(2) {
  animation-delay: 0.2s;
}
.grid-responsive > .ai-card:nth-child(3) {
  animation-delay: 0.3s;
}
.grid-responsive > .ai-card:nth-child(4) {
  animation-delay: 0.4s;
}
.grid-responsive > .ai-card:nth-child(5) {
  animation-delay: 0.5s;
}
.grid-responsive > .ai-card:nth-child(6) {
  animation-delay: 0.6s;
}

/* ============================================
   Dark Theme Specific Adjustments
   ============================================ */

[data-theme="dark"] .ai-card {
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .ai-card:hover {
  box-shadow: 0 20px 40px rgba(99, 102, 241, 0.15);
}

[data-theme="dark"] .section-title {
  color: #818cf8;
}

/* ============================================
   Utility Classes
   ============================================ */

.container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

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

.text-lg {
  font-size: 1.1rem;
}

.text-secondary {
  color: var(--text-secondary);
}

.max-width-lg {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   Quiz Section - Modern Styling
   ============================================ */

.quiz-container {
  max-width: 900px;
  margin: 0 auto;
  background: var(--bg-secondary);
  border-radius: var(--radius-xl);
  padding: var(--space-12);
  border: 1px solid var(--border-color);
}

.quiz-progress {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-8);
  gap: var(--space-4);
}

.progress-step {
  flex: 1;
  height: 6px;
  background: var(--border-color);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-step.active {
  background: var(--ai-gradient-1);
}

.quiz-question {
  display: none;
  animation: fadeInUp 0.5s ease-out;
}

.quiz-question.active {
  display: block;
}

.quiz-question h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: var(--space-6);
  color: var(--text-primary);
}

.quiz-options {
  display: grid;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.quiz-option {
  padding: var(--space-4) var(--space-6);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: var(--bg-primary);
  cursor: pointer;
  transition: all var(--transition-normal);
  font-size: 1rem;
  color: var(--text-primary);
  text-align: left;
}

.quiz-option:hover {
  border-color: var(--ai-primary);
  background: rgba(99, 102, 241, 0.05);
}

.quiz-option.selected {
  border-color: var(--ai-primary);
  background: rgba(99, 102, 241, 0.1);
}

.quiz-option.correct {
  border-color: #10b981;
  background: rgba(16, 185, 129, 0.1);
  color: #10b981;
}

.quiz-option.incorrect {
  border-color: #ef4444;
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}

.quiz-feedback {
  margin-top: var(--space-6);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-lg);
  display: none;
  font-weight: 600;
}

.quiz-feedback.show {
  display: block;
  animation: slideInUp 0.3s ease-out;
}

.quiz-feedback.correct {
  background: rgba(16, 185, 129, 0.1);
  color: #10b981;
}

.quiz-feedback.incorrect {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}

.quiz-button {
  padding: var(--space-3) var(--space-8);
  background: var(--ai-gradient-1);
  color: white;
  border: none;
  border-radius: var(--radius-lg);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  font-size: 1rem;
  display: inline-block;
}

.quiz-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.quiz-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.quiz-results {
  text-align: center;
  padding: var(--space-12);
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  display: none;
  animation: fadeInUp 0.5s ease-out;
}

.quiz-results.show {
  display: block;
}

.quiz-results h3 {
  font-size: 2rem;
  margin-bottom: var(--space-6);
  color: var(--text-primary);
}

.quiz-score {
  font-size: 3rem;
  font-weight: 800;
  background: linear-gradient(
    135deg,
    var(--ai-primary) 0%,
    var(--ai-secondary) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-6);
}

.quiz-message {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
}

/* ============================================
   Page-specific Sections
   ============================================ */

.video-section {
  background: var(--bg-secondary);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin: var(--space-12) 0;
  border: 1px solid var(--border-color);
}

.video-container {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
  border-radius: var(--radius-lg);
}

/* ============================================
   Call to Action Section
   ============================================ */

.cta-section {
  background: var(--ai-gradient-1);
  color: white;
  border-radius: var(--radius-xl);
  padding: var(--space-12);
  text-align: center;
  margin: var(--space-12) 0;
  position: relative;
  overflow: hidden;
}

.cta-section h3 {
  font-size: 2rem;
  margin-bottom: var(--space-4);
  font-weight: 800;
}

.cta-section p {
  font-size: 1.1rem;
  opacity: 0.95;
  margin-bottom: var(--space-8);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta-button {
  padding: var(--space-4) var(--space-8);
  background: white;
  color: var(--ai-primary);
  border: none;
  border-radius: var(--radius-lg);
  font-weight: 700;
  font-size: 1.1rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}

.cta-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

/* ============================================
   Additional Responsive Adjustments
   ============================================ */

@media (max-width: 768px) {
  .quiz-container {
    padding: var(--space-6);
  }

  .cta-section {
    padding: var(--space-8);
    margin: var(--space-8) 0;
  }

  .cta-section h3 {
    font-size: 1.5rem;
  }

  .video-section {
    padding: var(--space-6);
    margin: var(--space-8) 0;
  }
}

@media (max-width: 480px) {
  .quiz-container {
    padding: var(--space-4);
  }

  .quiz-option {
    padding: var(--space-3) var(--space-4);
    font-size: 0.9rem;
  }

  .quiz-button {
    padding: var(--space-2) var(--space-6);
    font-size: 0.95rem;
  }

  .cta-section {
    padding: var(--space-6);
  }

  .cta-section h3 {
    font-size: 1.25rem;
  }

  .cta-section p {
    font-size: 0.95rem;
  }

  .cta-button {
    padding: var(--space-3) var(--space-6);
    font-size: 1rem;
  }
}