/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary:   #0D3B66;
  --secondary: #1B6B93;
  --accent:    #14919B;
  --bg:        #EDF2F7;
  --surface:   #FFFFFF;
  --text:      #0A1628;
  --muted:     #4A6580;
  --alt-bg:    #F5F9FF;
  --dark-card: #0A1628;
  --radius:    8px;
  --shadow:    0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
}

img { display: block; max-width: 100%; height: auto; }
a   { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== Flecto Header ===== */
.flecto-header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0.6rem 1.5rem;
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(13,59,102,0.08);
}
.flecto-back {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.02em;
}
.flecto-back:hover { color: var(--accent); text-decoration: none; }

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center 30%;
  z-index: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13,59,102,0.85) 0%, rgba(10,22,40,0.7) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  width: 100%;
  padding: 3rem 2rem;
  text-align: center;
  color: #fff;
  animation: fadeUp 0.6s ease 0.3s both;
}

.channel-tag {
  display: inline-block;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
}

.hero-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.8rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 0.75rem;
  color: #fff;
}

.hero-speaker {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.85);
  margin-bottom: 1rem;
}

.hero-meta-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  color: rgba(255,255,255,0.75);
  font-size: 0.9rem;
}
.hero-duration {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.watch-btn {
  display: inline-block;
  padding: 0.75rem 2rem;
  border-radius: 9999px;
  background: var(--accent);
  color: #fff !important;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  transition: background 0.2s, transform 0.2s;
  text-decoration: none !important;
  margin-bottom: 2rem;
}
.watch-btn:hover {
  background: var(--secondary);
  transform: translateY(-1px);
}

.hero-thumbnail {
  margin: 0 auto;
  max-width: 240px;
  border-radius: var(--radius);
  box-shadow: 0 8px 32px rgba(0,0,0,0.35);
}

/* ===== Sections ===== */
.section {
  padding: 4rem 1.5rem;
  background: var(--surface);
}
.section.alt-bg {
  background: var(--alt-bg);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
}

.section-header {
  margin-bottom: 2.5rem;
  border-left: 4px solid var(--accent);
  padding-left: 1rem;
}
.section-header h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}
.section-subtitle {
  margin-top: 0.4rem;
  color: var(--muted);
  font-size: 0.95rem;
}

/* ===== Key Takeaways ===== */
.takeaways-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}

.takeaway-card {
  background: var(--surface);
  border-radius: 12px;
  border-left: 4px solid var(--accent);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  position: relative;
  transition: transform 0.2s, box-shadow 0.2s;
}
.takeaway-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
}

.takeaway-card h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 0.5rem;
  line-height: 1.35;
}
.takeaway-card p {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.65;
}

/* ===== Timeline ===== */
.timeline {
  position: relative;
  padding-left: 2.5rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0.55rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--accent);
  opacity: 0.4;
}

.timeline-item {
  position: relative;
  margin-bottom: 2.5rem;
}
.timeline-item:last-child { margin-bottom: 0; }

.timeline-marker {
  position: absolute;
  left: -2.5rem;
  top: 0.2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
}
.timeline-ts {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 600;
  white-space: nowrap;
}
.timeline-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--surface);
  box-shadow: 0 0 0 2px var(--accent);
}

.timeline-content h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 0.5rem;
}
.timeline-content p {
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.frame-figure {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-top: 0.75rem;
}
.frame-img {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  max-width: 360px;
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}
.frame-figure figcaption {
  font-size: 0.8rem;
  color: var(--muted);
  font-style: italic;
}

@media (min-width: 768px) {
  .timeline-content {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 1.5rem;
    align-items: start;
  }
  .timeline-content h3,
  .timeline-content p {
    grid-column: 1;
  }
  .frame-figure {
    grid-column: 2;
    grid-row: 1 / 3;
    margin-top: 0;
  }
}

/* ===== Visual Highlights ===== */
.highlights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}

.highlight-card {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--surface);
  transition: transform 0.2s, box-shadow 0.2s;
}
.highlight-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.highlight-card.dark-card {
  background: var(--dark-card);
}

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

.highlight-card figcaption {
  padding: 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.highlight-card figcaption strong {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.35;
}
.highlight-card.dark-card figcaption strong {
  color: #fff;
}
.highlight-card figcaption span {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.5;
}
.highlight-card.dark-card figcaption span {
  color: rgba(255,255,255,0.65);
}
.highlight-card figcaption .step-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ===== Transcript Accordion ===== */
.transcript-accordion {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.transcript-accordion summary {
  padding: 1rem 1.5rem;
  background: var(--bg);
  cursor: pointer;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  color: var(--primary);
  font-size: 0.95rem;
  list-style: none;
  user-select: none;
  border-radius: var(--radius);
  transition: background 0.15s;
}
.transcript-accordion summary::-webkit-details-marker { display: none; }
.transcript-accordion summary:hover { background: #dde8f0; }
.transcript-accordion[open] summary { border-radius: var(--radius) var(--radius) 0 0; }

.transcript-body {
  padding: 1.5rem;
  background: var(--surface);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  line-height: 1.85;
  color: var(--text);
  border-radius: 0 0 var(--radius) var(--radius);
  max-height: 60vh;
  overflow-y: auto;
}
.transcript-body p {
  margin-bottom: 0.75rem;
}
.transcript-body .ts {
  color: var(--accent);
  font-weight: 600;
  margin-right: 0.5rem;
}

/* ===== Reveal Animations ===== */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .hero-content { animation: none; }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ===== Responsive ===== */
@media (max-width: 600px) {
  .hero-content { padding: 2rem 1rem; }
  .section { padding: 2.5rem 1rem; }
  .timeline { padding-left: 2rem; }
  .timeline-marker { left: -2rem; }
  .takeaways-grid,
  .highlights-grid { grid-template-columns: 1fr; }
}

/* ===== AI Summary Blocks ===== */
.flecto-note, .flecto-callout, .flecto-card, .flecto-panel {
  margin: 1.25rem 0 0.5rem;
  padding: 1.25rem 1.5rem 1.25rem 1.25rem;
  background: rgba(20, 145, 155, 0.06);
  border-radius: 8px;
  border: 1px solid rgba(20, 145, 155, 0.2);
  border-left: 3px solid var(--accent);
}
.flecto-card::before {
  content: "🤖 AI SUMMARY";
  font-family: monospace;
  font-size: 0.6rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent);
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 0.75rem;
}
.flecto-card h4 {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
}
.flecto-card ul {
  margin: 0;
  padding-left: 1.2em;
  font-size: 0.85rem;
  line-height: 1.7;
}
.flecto-card li {
  margin-bottom: 0.4rem;
}

/* ===== YouTube click-to-timestamp ===== */
.highlight-card[data-yt-ts] { cursor: pointer; }
.highlight-card[data-yt-ts]::before {
  content: "▶";
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%,-50%) scale(0.6);
  font-size: 2.2rem;
  color: #fff;
  opacity: 0;
  z-index: 4;
  transition: transform 0.18s ease, opacity 0.18s ease;
}
.highlight-card[data-yt-ts]:hover::before {
  transform: translate(-50%,-50%) scale(1);
  opacity: 0.95;
}