* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: #0b0c0e;
  color: #e8edf5;
  min-height: 100vh;
}

.demo-back {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 50;
  color: #8fa3bf;
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  background: rgba(11, 12, 14, 0.75);
  border: 1px solid #2a3342;
  border-radius: 999px;
  padding: 0.45rem 0.95rem;
  backdrop-filter: blur(6px);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.demo-back:hover {
  color: #e8edf5;
  border-color: #1e90ff;
}

.app-shell {
  max-width: 1000px;
  margin: 0 auto;
  padding: 4.5rem 1.25rem 3.5rem;
}

.page-header {
  text-align: center;
  margin-bottom: 2rem;
}

.eyebrow {
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.7rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: #1e90ff;
  margin-bottom: 0.6rem;
}

.page-header h1 {
  font-family: 'Inter Tight', 'Inter', sans-serif;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.lede {
  color: #8fa3bf;
  max-width: 58ch;
  margin: 0 auto;
  line-height: 1.6;
}

/* ─── Player ─────────────────────────────────────────────── */
.player-wrap {
  margin-bottom: 2.75rem;
}

.player {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #06070a;
  border: 1px solid #1d2532;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(30, 144, 255, 0.05);
}

#video-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1.2s ease;
}

.player.lit #video-canvas {
  opacity: 1;
}

.video-stage {
  position: absolute;
  inset: 0 0 44px 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 1.5rem;
  text-align: center;
  transition: opacity 0.5s ease;
}

.player.fading .video-stage,
.player.fading #video-canvas {
  opacity: 0;
}

/* ─── Poster / play overlay ──────────────────────────────── */
.poster {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  background: radial-gradient(ellipse at center, rgba(30, 144, 255, 0.08), rgba(6, 7, 10, 0.72) 70%);
  transition: opacity 0.4s ease;
}

.poster.hidden {
  opacity: 0;
  pointer-events: none;
}

.play-button {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  border: 1px solid rgba(30, 144, 255, 0.55);
  background: rgba(30, 144, 255, 0.14);
  color: #e8edf5;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-left: 6px;
  cursor: pointer;
  box-shadow: 0 0 40px rgba(30, 144, 255, 0.35);
  transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.play-button:hover {
  transform: scale(1.07);
  background: rgba(30, 144, 255, 0.28);
  box-shadow: 0 0 60px rgba(30, 144, 255, 0.5);
}

.poster-label {
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: #8fa3bf;
}

/* ─── Player bar ─────────────────────────────────────────── */
.player-bar {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 6;
  height: 44px;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0 0.9rem;
  background: rgba(8, 9, 12, 0.82);
  border-top: 1px solid #1d2532;
  backdrop-filter: blur(8px);
}

.bar-button {
  background: none;
  border: none;
  color: #8fa3bf;
  font-size: 1.05rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.25rem;
  transition: color 0.2s ease;
}

.bar-button:hover {
  color: #e8edf5;
}

.progress-track {
  flex: 1;
  height: 4px;
  border-radius: 999px;
  background: #1d2532;
  overflow: hidden;
}

.progress-fill {
  width: 0%;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, #1e90ff, #78b4ff);
  box-shadow: 0 0 10px rgba(30, 144, 255, 0.6);
}

.time-readout {
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.72rem;
  color: #8fa3bf;
  white-space: nowrap;
}

.live-badge {
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.58rem;
  letter-spacing: 0.22em;
  color: #1e90ff;
  border: 1px solid rgba(30, 144, 255, 0.4);
  border-radius: 999px;
  padding: 0.25rem 0.55rem;
  white-space: nowrap;
}

/* ─── Video text content ─────────────────────────────────── */
.video-line {
  margin: 0;
  color: #e8edf5;
  font-size: clamp(1.15rem, 3.4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.3;
  max-width: 20ch;
}

.video-word {
  display: inline-block;
  opacity: 0;
  transform: translateY(26px);
  filter: blur(12px);
  transition:
    opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.6s cubic-bezier(0.22, 1, 0.36, 1),
    filter 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.video-line.in .video-word {
  opacity: 1;
  transform: none;
  filter: blur(0);
}

.video-line.out .video-word {
  opacity: 0;
  transform: translateY(-18px);
  filter: blur(8px);
  transition-duration: 0.45s;
}

.video-word.glow {
  color: #1e90ff;
  text-shadow: 0 0 26px rgba(30, 144, 255, 0.55);
}

.video-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.9rem;
}

.video-logo h2 {
  margin: 0;
  color: #ffffff;
  font-size: clamp(1.8rem, 5.5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: 0.45em;
  padding-left: 0.45em;
  opacity: 0;
  transition:
    letter-spacing 1.4s cubic-bezier(0.22, 1, 0.36, 1),
    padding-left 1.4s cubic-bezier(0.22, 1, 0.36, 1),
    opacity 1.1s ease;
}

.video-logo.in h2 {
  letter-spacing: 0.06em;
  padding-left: 0.06em;
  opacity: 1;
}

.video-logo .logo-rule {
  width: 0;
  height: 1px;
  background: #1e90ff;
  box-shadow: 0 0 14px rgba(30, 144, 255, 0.65);
  transition: width 1.2s cubic-bezier(0.22, 1, 0.36, 1) 0.35s;
}

.video-logo.in .logo-rule {
  width: min(240px, 50%);
}

.video-logo .logo-tag {
  margin: 0;
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.62rem;
  letter-spacing: 0.5em;
  padding-left: 0.5em;
  color: #8fa3bf;
  text-transform: uppercase;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.8s ease 0.75s, transform 0.8s ease 0.75s;
}

.video-logo.in .logo-tag {
  opacity: 1;
  transform: none;
}

/* ─── Explainer ──────────────────────────────────────────── */
.explainer h2 {
  font-family: 'Inter Tight', 'Inter', sans-serif;
  font-size: 1.5rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 1.4rem;
}

.explainer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.explainer-grid article {
  background: #101319;
  border: 1px solid #1d2532;
  border-radius: 12px;
  padding: 1.25rem 1.2rem;
}

.explainer-grid h3 {
  font-size: 1rem;
  font-weight: 700;
  color: #1e90ff;
  margin-bottom: 0.5rem;
}

.explainer-grid p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: #8fa3bf;
}

@media (max-width: 720px) {
  .app-shell {
    padding-top: 4rem;
  }

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

  .play-button {
    width: 64px;
    height: 64px;
  }

  .live-badge {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .video-word,
  .video-logo h2,
  .video-logo .logo-rule,
  .video-logo .logo-tag {
    transition-duration: 0.01s;
    transition-delay: 0s;
  }
}