/* ═══════════════════════════════════════════════════
   BIONOTES — Homepage Sections CSS
   Ticker | Features | Carousel | Trending | Stats
   Journey | Testimonials | FAQ | CTA
═══════════════════════════════════════════════════ */

/* ════════════════════════════════
   1. STATS TICKER STRIP
════════════════════════════════ */
.stats-ticker {
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-secondary));
  padding: 0.7rem 0;
  overflow: hidden;
  position: relative;
  z-index: 2;
}
[data-theme="light"] .stats-ticker {
  background: linear-gradient(90deg, #00cc8f, #00b8d9);
}
.ticker-wrap { display: flex; overflow: hidden; user-select: none; }
.ticker-track {
  display: flex;
  gap: 4rem;
  animation: tickerScroll 28s linear infinite;
  will-change: transform;
  flex-shrink: 0;
}
.ticker-track:hover { animation-play-state: paused; }
.ticker-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: #000;
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  white-space: nowrap;
  text-transform: uppercase;
}
.ticker-sep {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: rgba(0,0,0,0.25);
  flex-shrink: 0;
}
@keyframes tickerScroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ════════════════════════════════
   2. FEATURE HIGHLIGHTS
════════════════════════════════ */
.features-section {
  padding: 5rem 2rem;
  max-width: 1360px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.feature-card {
  position: relative;
  padding: 2.5rem 2rem;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--trans-normal);
  cursor: default;
}
.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 30%, rgba(var(--fc-rgb, 0,255,178), 0.08) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.4s;
}
.feature-card:hover { border-color: rgba(var(--fc-rgb, 0,255,178), 0.35); transform: translateY(-6px); box-shadow: 0 24px 60px rgba(0,0,0,0.4), 0 0 40px rgba(var(--fc-rgb,0,255,178),0.08); }
.feature-card:hover::before { opacity: 1; }

[data-theme="light"] .feature-card { background: rgba(255,255,255,0.7); border-color: rgba(0,0,0,0.06); box-shadow: 0 4px 20px rgba(0,0,0,0.06); }

.feature-num {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  color: var(--clr-text-mute);
  margin-bottom: 1.5rem;
}
.feature-icon {
  font-size: 2.8rem;
  margin-bottom: 1.25rem;
  display: block;
  filter: drop-shadow(0 0 16px rgba(var(--fc-rgb,0,255,178),0.4));
  transition: filter 0.4s, transform 0.4s;
}
.feature-card:hover .feature-icon { filter: drop-shadow(0 0 28px rgba(var(--fc-rgb,0,255,178),0.7)); transform: scale(1.1) rotate(-5deg); }
.feature-title {
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 0.75rem;
}
.feature-desc { font-size: 0.88rem; color: var(--clr-text-dim); line-height: 1.7; }
.feature-accent {
  position: absolute;
  bottom: 0; right: 0;
  font-family: var(--font-head);
  font-size: 6rem;
  font-weight: 900;
  color: rgba(var(--fc-rgb, 0,255,178), 0.05);
  line-height: 1;
  pointer-events: none;
  letter-spacing: -0.05em;
}

/* ════════════════════════════════
   3. SUBJECTS CAROUSEL (enhanced)
════════════════════════════════ */
.subjects-section {
  padding: 5rem 0 6rem;
  position: relative;
  z-index: 1;
  overflow: hidden;
}
.subjects-section-inner {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 2rem;
}
.carousel-wrapper {
  position: relative;
  margin-top: 2.5rem;
}
.carousel-track-clip {
  overflow: hidden;
  border-radius: var(--radius-xl);
}
.carousel-track {
  display: flex;
  gap: 1.5rem;
  transition: transform 0.5s cubic-bezier(0.4,0,0.2,1);
  will-change: transform;
  padding: 0.5rem;
}
/* Use the existing .subject-card but with more detail */
.subject-card-carousel {
  min-width: 320px;
  flex-shrink: 0;
}
.carousel-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.75rem;
  margin-top: 2rem;
}
.carousel-btn {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  color: var(--clr-text-dim);
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--trans-fast);
}
.carousel-btn:hover { background: var(--clr-primary); color: #000; border-color: transparent; }
.carousel-dots {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}
.carousel-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--clr-border);
  transition: all 0.3s;
  cursor: none;
}
.carousel-dot.active { background: var(--clr-primary); width: 20px; border-radius: 3px; }

/* ════════════════════════════════
   4. TRENDING NOTES
════════════════════════════════ */
.trending-section {
  padding: 5rem 2rem;
  max-width: 1360px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.trending-header-wrap {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 2.5rem;
  gap: 1rem;
  flex-wrap: wrap;
}
.view-all-btn {
  font-family: var(--font-head);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--clr-primary);
  text-decoration: none;
  border: 1px solid rgba(0,255,178,0.3);
  padding: 8px 20px;
  border-radius: 99px;
  transition: all var(--trans-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.view-all-btn:hover { background: rgba(0,255,178,0.08); border-color: var(--clr-primary); }

.trending-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}
.trending-note-card {
  position: relative;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  overflow: hidden;
  transition: all var(--trans-normal);
  cursor: none;
}
.trending-note-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--tn-color, #00FFB2), transparent);
}
.trending-note-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  border-color: rgba(var(--tn-rgb, 0,255,178), 0.3);
}
[data-theme="light"] .trending-note-card { background: rgba(255,255,255,0.7); }

.trending-rank {
  position: absolute;
  top: 1.25rem; right: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: var(--clr-text-mute);
}
.hot-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  color: #ff6b35;
  background: rgba(255,107,53,0.1);
  border: 1px solid rgba(255,107,53,0.25);
  padding: 3px 10px;
  border-radius: 99px;
  margin-bottom: 0.75rem;
  display: inline-flex;
  width: fit-content;
}
.trending-subject-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  color: var(--tn-color, #00FFB2);
  background: rgba(var(--tn-rgb, 0,255,178), 0.08);
  border: 1px solid rgba(var(--tn-rgb, 0,255,178), 0.2);
  padding: 3px 10px;
  border-radius: 99px;
  margin-bottom: 0.6rem;
  width: fit-content;
}
.trending-title {
  font-family: var(--font-head);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--clr-text);
  line-height: 1.4;
  margin-bottom: 0.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.trending-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--clr-text-mute);
  margin-bottom: 1.25rem;
}
.trending-actions { display: flex; gap: 0.5rem; }
.tn-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-head);
  font-size: 0.62rem;
  letter-spacing: 0.05em;
  font-weight: 700;
  padding: 7px 16px;
  border-radius: 99px;
  transition: all var(--trans-fast);
  border: 1px solid transparent;
  text-decoration: none;
  cursor: none;
}
.tn-view { color: #000; background: var(--tn-color, var(--clr-primary)); }
.tn-view:hover { transform: scale(1.05); box-shadow: 0 0 16px rgba(var(--tn-rgb,0,255,178),0.4); }
.tn-dl { color: var(--clr-text-dim); border-color: var(--clr-border); background: transparent; }
.tn-dl:hover { border-color: var(--tn-color, var(--clr-primary)); color: var(--tn-color, var(--clr-primary)); }

/* ════════════════════════════════
   5. STATS SHOWCASE
════════════════════════════════ */
.stats-showcase {
  padding: 6rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  z-index: 1;
}
.stats-showcase::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    rgba(0,255,178,0.03) 0%,
    rgba(123,97,255,0.04) 50%,
    rgba(0,217,255,0.03) 100%
  );
  pointer-events: none;
}
.stats-showcase-inner {
  max-width: 1000px;
  margin: 0 auto;
}
.big-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}
.big-stat {
  position: relative;
  padding: 2.5rem 1.5rem;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--trans-normal);
}
.big-stat:hover {
  border-color: var(--clr-border-hi);
  transform: translateY(-4px);
  box-shadow: var(--glow-green);
}
.big-stat-num {
  font-family: var(--font-head);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.big-stat-label {
  font-family: var(--font-head);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--clr-text);
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}
.big-stat-sub { font-size: 0.78rem; color: var(--clr-text-dim); font-family: var(--font-mono); }
.big-stat-glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, rgba(0,255,178,0.05), transparent 70%);
  opacity: 0;
  transition: opacity 0.4s;
}
.big-stat:hover .big-stat-glow { opacity: 1; }

/* ════════════════════════════════
   6. SEMESTER JOURNEY / ROADMAP
════════════════════════════════ */
.journey-section {
  padding: 6rem 2rem;
  max-width: 1360px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.journey-intro {
  max-width: 560px;
  margin-bottom: 3.5rem;
}
.journey-intro p { color: var(--clr-text-dim); font-size: 0.95rem; line-height: 1.75; margin-top: 0.75rem; }

.semester-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}
.semester-card {
  position: relative;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.25rem;
  overflow: hidden;
  transition: all var(--trans-normal);
}
.semester-card.active {
  border-color: rgba(0,255,178,0.4);
  background: rgba(0,255,178,0.04);
}
.semester-card.coming-soon { opacity: 0.45; }
.semester-card:not(.coming-soon):hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.3), var(--glow-green);
  border-color: var(--clr-border-hi);
}
.sem-num {
  font-family: var(--font-head);
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--clr-border);
  line-height: 1;
  margin-bottom: 0.5rem;
  transition: color 0.3s;
}
.semester-card.active .sem-num { color: var(--clr-primary); filter: drop-shadow(0 0 12px rgba(0,255,178,0.4)); }
.sem-label {
  font-family: var(--font-head);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--clr-text);
  margin-bottom: 0.35rem;
}
.sem-subjects {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--clr-text-dim);
  line-height: 1.7;
}
.sem-status {
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.sem-status.live { color: var(--clr-primary); }
.sem-status.soon { color: var(--clr-text-mute); }
.sem-active-badge {
  position: absolute;
  top: 1rem; right: 1rem;
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.1em;
  color: #000;
  background: var(--clr-primary);
  padding: 2px 8px;
  border-radius: 4px;
}

/* ════════════════════════════════
   7. TESTIMONIALS
════════════════════════════════ */
.testimonials-section {
  padding: 6rem 2rem;
  position: relative;
  overflow: hidden;
  z-index: 1;
}
.testimonials-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent, rgba(0,255,178,0.025), transparent);
  pointer-events: none;
}
.testimonials-inner {
  max-width: 1100px;
  margin: 0 auto;
}
.testimonials-carousel-wrap {
  position: relative;
  margin-top: 3rem;
  overflow: hidden;
}
.testimonials-track {
  display: flex;
  gap: 1.5rem;
  transition: transform 0.5s cubic-bezier(0.4,0,0.2,1);
}
.testimonial-card {
  min-width: calc(33.333% - 1rem);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: 2.25rem;
  position: relative;
  overflow: hidden;
  transition: all var(--trans-normal);
  flex-shrink: 0;
}
.testimonial-card:hover {
  border-color: var(--clr-border-hi);
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.3);
}
[data-theme="light"] .testimonial-card { background: rgba(255,255,255,0.8); }

.quote-mark {
  font-family: serif;
  font-size: 4rem;
  line-height: 0.5;
  color: var(--clr-primary);
  opacity: 0.3;
  margin-bottom: 1rem;
  display: block;
}
.testimonial-text {
  font-size: 0.92rem;
  color: var(--clr-text-dim);
  line-height: 1.8;
  margin-bottom: 1.5rem;
  font-style: italic;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.author-avatar {
  width: 42px; height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  font-family: var(--font-head);
  font-weight: 700;
  color: #000;
  font-size: 0.85rem;
}
.author-name {
  font-family: var(--font-head);
  font-size: 0.8rem;
  color: var(--clr-text);
  font-weight: 600;
}
.author-year {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--clr-text-mute);
}
.stars {
  position: absolute;
  top: 1.5rem; right: 1.5rem;
  color: #FFD700;
  font-size: 0.8rem;
  letter-spacing: 2px;
}
.testimonials-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-top: 2rem;
}

/* ════════════════════════════════
   8. FAQ SECTION
════════════════════════════════ */
.faq-section {
  padding: 5rem 2rem;
  max-width: 860px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.faq-list { margin-top: 2.5rem; display: flex; flex-direction: column; gap: 0.75rem; }
.faq-item {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--trans-fast), box-shadow var(--trans-fast);
}
.faq-item:hover { border-color: var(--clr-border-hi); }
[data-theme="light"] .faq-item { background: rgba(255,255,255,0.75); }

.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  font-family: var(--font-head);
  font-size: 0.88rem;
  color: var(--clr-text);
  text-align: left;
  gap: 1rem;
  transition: color var(--trans-fast);
}
.faq-q:hover { color: var(--clr-primary); }
.faq-chevron {
  color: var(--clr-text-mute);
  font-size: 0.85rem;
  transition: transform 0.35s ease;
  flex-shrink: 0;
}
.faq-item.open .faq-chevron { transform: rotate(180deg); color: var(--clr-primary); }
.faq-item.open .faq-q { color: var(--clr-primary); }

.faq-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4,0,0.2,1), padding 0.3s;
  padding: 0 1.5rem;
}
.faq-item.open .faq-body {
  max-height: 300px;
  padding: 0 1.5rem 1.25rem;
}
.faq-a {
  font-size: 0.875rem;
  color: var(--clr-text-dim);
  line-height: 1.8;
  border-top: 1px solid var(--clr-border);
  padding-top: 1rem;
}

/* ════════════════════════════════
   9. CTA SECTION
════════════════════════════════ */
.cta-section {
  padding: 5rem 2rem;
  position: relative;
  z-index: 1;
  overflow: hidden;
}
.cta-inner {
  max-width: 860px;
  margin: 0 auto;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border-hi);
  border-radius: var(--radius-2xl);
  padding: 4rem 3rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-inner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(0,255,178,0.06) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(0,217,255,0.06) 0%, transparent 50%);
  pointer-events: none;
}
.cta-inner::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--clr-primary), var(--clr-secondary), var(--clr-accent), transparent);
}
[data-theme="light"] .cta-inner {
  background: rgba(255,255,255,0.8);
  box-shadow: 0 8px 40px rgba(0,0,0,0.08);
}
.cta-title {
  font-family: var(--font-head);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 900;
  color: var(--clr-text);
  margin-bottom: 1rem;
  line-height: 1.15;
}
.cta-desc {
  font-size: 1rem;
  color: var(--clr-text-dim);
  max-width: 500px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}
.cta-actions { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; }
.cta-dna-bg {
  position: absolute;
  right: -60px; top: -60px;
  font-size: 18rem;
  opacity: 0.03;
  font-family: 'Orbitron', sans-serif;
  pointer-events: none;
  color: var(--clr-primary);
  line-height: 1;
}

/* ════════════════════════════════
   RESPONSIVE
════════════════════════════════ */
@media (max-width: 1100px) {
  .big-stats-grid { grid-template-columns: repeat(2, 1fr); }
  .semester-grid  { grid-template-columns: repeat(2, 1fr); }
  .testimonial-card { min-width: calc(50% - 0.75rem); }
}
@media (max-width: 900px) {
  .features-grid { grid-template-columns: 1fr; }
  .trending-grid  { grid-template-columns: repeat(2, 1fr); }
  .cta-inner { padding: 2.5rem 1.5rem; }
}
@media (max-width: 600px) {
  .big-stats-grid { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
  .semester-grid  { grid-template-columns: repeat(2, 1fr); }
  .trending-grid  { grid-template-columns: 1fr; }
  .testimonial-card { min-width: 90vw; }
  .subject-card-carousel { min-width: calc(100vw - 4rem); }
}