/* ========================================
   Home Page Styles
   ======================================== */

/* Hero */
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
  padding: 80px 0;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(240,180,41,0.08);
  border: 1px solid rgba(240,180,41,0.2);
  padding: 6px 16px;
  border-radius: 20px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-yellow);
  margin-bottom: 28px;
  animation: fadeInUp 0.5s ease forwards;
}

.hero-title {
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  font-weight: 800;
  color: var(--accent-yellow);
  margin-bottom: 24px;
  animation: fadeInUp 0.6s 0.1s ease both;
  font-family: var(--font-display);
  line-height: 1.1;
}

.hero-title em {
  font-style: normal;
  color: var(--text-primary);
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 36px;
  animation: fadeInUp 0.6s 0.2s ease both;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp 0.6s 0.3s ease both;
}

.hero-tags {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 40px;
  animation: fadeInUp 0.6s 0.4s ease both;
}

.hero-tag {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* Featured Courses on Home */
.home-courses {
  background: var(--bg-primary);
}

/* Ebook Section */
.ebooks-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.ebook-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}

.ebook-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.ebook-card:hover {
  border-color: rgba(240,180,41,0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

.ebook-cover {
  background: linear-gradient(135deg, var(--bg-card-hover) 0%, #0d1117 100%);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 180px;
  position: relative;
  border-bottom: 1px solid var(--border-color);
}

.ebook-cover-icon {
  font-size: 2.5rem;
}

.ebook-cover-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  text-align: center;
  font-family: var(--font-display);
}

.ebook-cover-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.ebook-accent {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.ebook-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.ebook-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  font-family: var(--font-display);
}

.ebook-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  flex: 1;
  margin-bottom: 16px;
}

.ebook-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 14px;
}

.ebook-free-badge {
  background: rgba(63,185,80,0.12);
  color: #3fb950;
  border: 1px solid rgba(63,185,80,0.25);
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 0.7rem;
  font-weight: 700;
}

/* AI Assistant Section */
.ai-section {
  background: var(--bg-primary);
  padding: 100px 0;
}

.ai-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
  max-width: 860px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
}

.ai-wrapper::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-yellow), var(--accent-yellow-light), var(--accent-yellow));
}

.ai-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}

.ai-avatar {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, rgba(240,180,41,0.2), rgba(240,180,41,0.05));
  border: 1px solid rgba(240,180,41,0.3);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.ai-title-group h3 {
  font-size: 1.2rem;
  color: var(--text-primary);
  font-family: var(--font-display);
}

.ai-title-group p {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.ai-chat-area {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  min-height: 180px;
  margin-bottom: 20px;
  max-height: 320px;
  overflow-y: auto;
}

.ai-message {
  margin-bottom: 16px;
}

.ai-message-bot {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.ai-message-user {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  justify-content: flex-end;
}

.ai-msg-avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: rgba(240,180,41,0.1);
  border: 1px solid rgba(240,180,41,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.ai-msg-bubble {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 12px 16px;
  font-size: 0.875rem;
  color: var(--text-primary);
  max-width: 85%;
  line-height: 1.6;
}

.ai-msg-bubble.user {
  background: rgba(240,180,41,0.08);
  border-color: rgba(240,180,41,0.2);
}

.ai-input-row {
  display: flex;
  gap: 12px;
}

.ai-input {
  flex: 1;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 0.875rem;
  color: var(--text-primary);
  font-family: var(--font-body);
  transition: var(--transition);
  outline: none;
}

.ai-input:focus {
  border-color: var(--accent-yellow);
  box-shadow: 0 0 0 3px rgba(240,180,41,0.1);
}

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

.ai-send-btn {
  background: var(--accent-yellow);
  color: #0d1117;
  border: none;
  border-radius: var(--radius-sm);
  padding: 12px 20px;
  font-weight: 700;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 0.875rem;
  transition: var(--transition);
  white-space: nowrap;
}

.ai-send-btn:hover {
  background: var(--accent-yellow-light);
  transform: translateY(-1px);
}

.ai-send-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.ai-typing {
  display: flex;
  gap: 4px;
  padding: 4px 0;
}

.ai-typing span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-yellow);
  animation: typing-dot 1.2s infinite;
}

.ai-typing span:nth-child(2) { animation-delay: 0.2s; }
.ai-typing span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing-dot {
  0%, 60%, 100% { opacity: 0.3; transform: scale(1); }
  30% { opacity: 1; transform: scale(1.2); }
}

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

.why-card {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.why-card:hover {
  border-color: rgba(240,180,41,0.3);
  transform: translateY(-4px);
}

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

.why-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  font-family: var(--font-display);
}

.why-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Testimonials */
.testimonials-section {
  background: var(--bg-secondary);
  padding: 100px 0;
  border-top: 1px solid var(--border-color);
}

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

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition);
}

.testimonial-card:hover {
  border-color: rgba(240,180,41,0.2);
  transform: translateY(-3px);
}

.testimonial-stars {
  color: var(--accent-yellow);
  font-size: 0.9rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.testimonial-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
  font-style: italic;
}

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

.author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(240,180,41,0.1);
  border: 1px solid rgba(240,180,41,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.author-name {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-display);
}

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

@media (max-width: 1024px) {
  .why-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .why-grid {
    grid-template-columns: 1fr;
  }
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .ai-wrapper {
    padding: 28px 20px;
  }
  .ebook-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .ebook-grid {
    grid-template-columns: 1fr;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    justify-content: center;
  }
}