/* ======================================================
   NITHIN REDDY K — Course Page Specific Styles
   Premium Coaching Website
   ====================================================== */

/* ---------- Course Hero ---------- */
.course-hero {
  min-height: 70vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 140px 0 80px;
}
.course-hero-bg {
  position: absolute;
  inset: 0;
}
.course-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.course-hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(10,14,26,0.95) 0%, rgba(10,14,26,0.7) 50%, rgba(10,14,26,0.4) 100%),
    linear-gradient(180deg, rgba(10,14,26,0.9) 0%, transparent 40%, rgba(10,14,26,0.6) 100%);
}
.course-hero .hero-shape {
  z-index: 1;
}
.course-hero-container {
  position: relative;
  z-index: 2;
}
.course-hero-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.course-hero-breadcrumb a { color: var(--text-muted); }
.course-hero-breadcrumb a:hover { color: var(--accent); }
.course-hero-breadcrumb span { color: var(--accent); }
.course-hero-breadcrumb i { font-size: 0.7rem; }

.course-hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  background: rgba(245, 166, 35, 0.1);
  border: 1px solid rgba(245, 166, 35, 0.15);
  padding: 8px 20px;
  border-radius: 50px;
  margin-bottom: 20px;
}

.course-hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  color: var(--text-light);
  line-height: 1.15;
  margin-bottom: 20px;
  max-width: 800px;
}

.course-hero-desc {
  font-size: 1.15rem;
  color: var(--text);
  max-width: 650px;
  line-height: 1.8;
  margin-bottom: 32px;
}

.course-hero-meta {
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}
.course-hero-meta-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-size: 0.95rem;
}
.course-hero-meta-item i {
  width: 40px; height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(245, 166, 35, 0.1);
  border-radius: 10px;
  color: var(--accent);
  font-size: 1rem;
}

.course-hero-cta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- Course Nav Tabs ---------- */
.course-tabs {
  position: sticky;
  top: var(--nav-height);
  z-index: 50;
  background: rgba(10, 14, 26, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.course-tabs-container {
  display: flex;
  gap: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.course-tabs-container::-webkit-scrollbar { display: none; }
.course-tab {
  padding: 16px 24px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  font-family: var(--font-sans);
}
.course-tab:hover { color: var(--text); }
.course-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ---------- Course Sections ---------- */
.course-section-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  color: var(--text-light);
  margin-bottom: 32px;
}
.course-section-title i {
  color: var(--accent);
  margin-right: 12px;
}

/* Overview */
.overview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.overview-text p {
  color: var(--text);
  font-size: 1.02rem;
  margin-bottom: 16px;
  line-height: 1.8;
}
.overview-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.overview-highlight {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  transition: var(--transition);
}
.overview-highlight:hover {
  border-color: rgba(245, 166, 35, 0.12);
  box-shadow: var(--shadow-glow);
  transform: translateY(-3px);
}
.overview-highlight i {
  font-size: 1.8rem;
  color: var(--accent);
  margin-bottom: 12px;
}
.overview-highlight h4 {
  font-size: 1rem;
  color: var(--text-light);
  margin-bottom: 6px;
}
.overview-highlight span {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ---------- Curriculum Accordion ---------- */
.curriculum-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.curriculum-module {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}
.curriculum-module:hover { border-color: rgba(245, 166, 35, 0.1); }
.curriculum-module-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  gap: 16px;
}
.curriculum-module-header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}
.curriculum-module-number {
  width: 40px; height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-accent);
  color: var(--primary);
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: 10px;
  flex-shrink: 0;
}
.curriculum-module-title {
  font-weight: 600;
  color: var(--text-light);
  font-size: 1rem;
}
.curriculum-module-count {
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
}
.curriculum-module-toggle {
  color: var(--text-muted);
  transition: var(--transition);
  font-size: 0.85rem;
}
.curriculum-module.open .curriculum-module-toggle {
  transform: rotate(180deg);
}

.curriculum-module-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 24px;
}
.curriculum-module.open .curriculum-module-content {
  max-height: 800px;
  padding: 0 24px 20px;
}
.curriculum-topic {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-top: 1px solid var(--border);
  font-size: 0.92rem;
  color: var(--text);
}
.curriculum-topic:first-child { border-top: none; }
.curriculum-topic i {
  color: var(--accent);
  font-size: 0.85rem;
  width: 20px;
  text-align: center;
}

/* ---------- Instructor ---------- */
.instructor-card {
  display: flex;
  gap: 36px;
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 36px;
  align-items: center;
}
.instructor-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  color: var(--primary);
  flex-shrink: 0;
}
.instructor-info h3 {
  font-size: 1.3rem;
  color: var(--text-light);
  margin-bottom: 4px;
}
.instructor-role {
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 12px;
}
.instructor-info p {
  color: var(--text);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ---------- Pricing ---------- */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: start;
}
.pricing-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 36px;
  text-align: center;
  position: relative;
  transition: var(--transition);
}
.pricing-card:hover {
  border-color: rgba(245, 166, 35, 0.15);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}
.pricing-card-featured {
  border-color: rgba(245, 166, 35, 0.2);
  background: linear-gradient(145deg, rgba(30, 27, 75, 0.6), rgba(15, 23, 42, 0.8));
  box-shadow: var(--shadow-glow);
}
.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-accent);
  color: var(--primary);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 6px 20px;
  border-radius: 50px;
}
.pricing-name {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.pricing-price {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--text-light);
  margin-bottom: 8px;
}
.pricing-price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-muted);
}
.pricing-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.pricing-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
  text-align: left;
}
.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text);
}
.pricing-features li i {
  color: var(--accent);
  font-size: 0.85rem;
}

/* ---------- FAQ ---------- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: rgba(245, 166, 35, 0.1); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  gap: 16px;
  font-size: 0.98rem;
  font-weight: 500;
  color: var(--text-light);
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  font-family: var(--font-sans);
}
.faq-question i {
  color: var(--accent);
  transition: var(--transition);
  font-size: 0.85rem;
  flex-shrink: 0;
}
.faq-item.open .faq-question i {
  transform: rotate(180deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 24px;
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.7;
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px;
}

/* ---------- Course CTA ---------- */
.course-cta {
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}
.course-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(245,166,35,0.06), transparent 70%);
}
.course-cta-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 650px;
  margin: 0 auto;
}
.course-cta h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  color: var(--text-light);
  margin-bottom: 16px;
}
.course-cta p {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 32px;
}
.course-cta-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- Course Testimonials ---------- */
.course-testimonial-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.course-testimonial-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
}
.course-testimonial-card:hover {
  border-color: rgba(245, 166, 35, 0.1);
  box-shadow: var(--shadow-glow);
}
.course-testimonial-stars {
  color: var(--accent);
  margin-bottom: 12px;
  font-size: 0.85rem;
  letter-spacing: 3px;
}
.course-testimonial-text {
  font-size: 0.95rem;
  color: var(--text);
  line-height: 1.7;
  margin-bottom: 16px;
  font-style: italic;
}
.course-testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}
.course-testimonial-avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  flex-shrink: 0;
}
.course-testimonial-author div strong {
  display: block;
  font-size: 0.9rem;
  color: var(--text-light);
}
.course-testimonial-author div span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .overview-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 500px; margin: 0 auto; }
  .course-testimonial-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .course-hero { padding: 100px 0 60px; min-height: auto; }
  .course-hero-meta { gap: 16px; }
  .instructor-card { flex-direction: column; text-align: center; padding: 24px; }
  .overview-highlights { grid-template-columns: 1fr; }
  .curriculum-module-header { padding: 16px; }
  .curriculum-module-header-left { gap: 12px; }
  .curriculum-module-number { width: 32px; height: 32px; font-size: 0.8rem; }
}

@media (max-width: 480px) {
  .course-hero-cta { flex-direction: column; align-items: stretch; }
  .course-hero-cta .btn { width: 100%; }
  .pricing-card { padding: 24px; }
}