#sixty8-3d-experience {
  --bg: #03050a;
  --text: #f5f7fb;
  --muted: rgba(245, 247, 251, 0.62);
  --blue: #2f6fff;
  --line: rgba(255, 255, 255, 0.16);
  --sixty8-viewport-width: 100%;
  position: relative;
  width: var(--sixty8-viewport-width);
  max-width: none;
  height: 700vh;
  margin-top: 0;
  margin-right: calc((100% - var(--sixty8-viewport-width)) / 2);
  margin-bottom: 0;
  margin-left: calc((100% - var(--sixty8-viewport-width)) / 2);
  padding: 0;
  overflow-x: clip;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.4;
  isolation: isolate;
}

#sixty8-3d-experience,
#sixty8-3d-experience *,
#sixty8-3d-experience *::before,
#sixty8-3d-experience *::after {
  box-sizing: border-box;
}

#sixty8-3d-experience a { color: inherit; }

#sixty8-3d-experience .stage {
  position: sticky;
  top: 0;
  width: 100%;
  height: 100vh;
  margin: 0;
  padding: 0;
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(circle at 50% 55%, rgba(25, 61, 145, 0.13), transparent 28rem),
    linear-gradient(180deg, #020308 0%, #050914 100%);
}

#sixty8-3d-experience .scene-layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  pointer-events: none;
}

#sixty8-3d-experience .scene-background { z-index: 0; }

#sixty8-3d-experience .idea-art {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  object-position: center;
  opacity: 0;
  transform: translate(-50%, -50%);
  transform-origin: center;
  -webkit-mask-image: radial-gradient(ellipse 82% 88% at 44% 48%, #000 58%, transparent 100%);
  mask-image: radial-gradient(ellipse 82% 88% at 44% 48%, #000 58%, transparent 100%);
  will-change: transform, opacity;
}

#sixty8-3d-experience .scene-midground { z-index: 1; }

#sixty8-3d-experience .brand-ambient {
  position: absolute;
  z-index: 1;
  left: -8%;
  top: -8%;
  width: 78%;
  height: 62%;
  opacity: 0;
  pointer-events: none;
  background: radial-gradient(
    ellipse at 46% 48%,
    rgba(30, 83, 196, 0.18) 0%,
    rgba(13, 42, 105, 0.10) 34%,
    rgba(3, 5, 10, 0) 72%
  );
  will-change: opacity;
}

#sixty8-3d-experience .idea-sketch {
  position: absolute;
  left: 59.6%;
  top: 38.3%;
  height: 39vh;
  width: auto;
  overflow: visible;
  opacity: 0;
  transform: translate(-50%, -50%);
  transform-origin: center;
  pointer-events: none;
  will-change: opacity, transform;
}

#sixty8-3d-experience .idea-sketch-path {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
}

#sixty8-3d-experience .sketch-main {
  stroke: rgba(35, 38, 42, 0.88);
  stroke-width: 5;
}

#sixty8-3d-experience .sketch-rough {
  stroke: rgba(21, 25, 29, 0.42);
  stroke-width: 2.2;
  transform: translate(2px, -1.2px);
}

#sixty8-3d-experience .sketch-construction {
  stroke: rgba(48, 53, 58, 0.28);
  stroke-width: 1.4;
}

#sixty8-3d-experience .scene-hero { z-index: 2; }
#sixty8-3d-experience .scene-tablet { z-index: 3; }
#sixty8-3d-experience .scene-foreground { z-index: 3; }

#sixty8-3d-experience .vignette {
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
  background: radial-gradient(circle at center, transparent 40%, rgba(0, 0, 0, 0.5) 115%);
}

#sixty8-3d-experience .technical-annotations {
  position: absolute;
  inset: 0;
  z-index: 5;
  pointer-events: none;
  overflow: hidden;
}

#sixty8-3d-experience .technical-callout {
  --label-x: 100px;
  --label-y: -50px;
  position: absolute;
  left: 0;
  top: 0;
  opacity: 0;
  will-change: transform, opacity;
}

#sixty8-3d-experience .callout-line {
  position: absolute;
  left: 0;
  top: 0;
  overflow: visible;
}

#sixty8-3d-experience .callout-line path {
  fill: none;
  stroke: rgba(141, 178, 255, 0.72);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
}

#sixty8-3d-experience .callout-hotspot {
  position: absolute;
  left: -3px;
  top: -3px;
  width: 7px;
  height: 7px;
  border: 1px solid #9bbcff;
  border-radius: 50%;
  background: #071634;
  box-shadow: 0 0 0 3px rgba(91, 139, 232, 0.12);
}

#sixty8-3d-experience .callout-label {
  position: absolute;
  left: var(--label-x);
  top: var(--label-y);
  width: max-content;
  color: rgba(220, 231, 255, 0.88);
  font-size: 0.61rem;
  line-height: 1;
  font-weight: 700;
  letter-spacing: 0.15em;
  white-space: nowrap;
  transform: translateY(-50%);
}

#sixty8-3d-experience .chapter {
  position: absolute;
  z-index: 6;
  left: clamp(1.5rem, 7vw, 7rem);
  bottom: clamp(2rem, 9vh, 7rem);
  width: min(520px, calc(100vw - 3rem));
  margin: 0;
  padding: 0;
  opacity: 0;
  transform: translateY(28px);
  pointer-events: none;
}

#sixty8-3d-experience .chapter h2 {
  max-width: none;
  margin: 0.5rem 0 0;
  padding: 0;
  color: var(--text);
  font-family: inherit;
  font-size: clamp(2.7rem, 6vw, 6rem);
  line-height: 0.94;
  letter-spacing: -0.055em;
  font-weight: 670;
  text-transform: none;
}

#sixty8-3d-experience .chapter p:not(.chapter-number) {
  max-width: 430px;
  margin: 1rem 0 0;
  padding: 0;
  color: var(--muted);
  font-family: inherit;
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  line-height: 1.55;
  font-weight: 400;
}

#sixty8-3d-experience .chapter-number {
  margin: 0;
  padding: 0;
  color: #8db2ff;
  font-family: inherit;
  font-size: 0.72rem;
  line-height: 1.4;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

#sixty8-3d-experience .chapter-final { pointer-events: auto; }

#sixty8-3d-experience .cta {
  display: inline-flex;
  gap: 0.8rem;
  align-items: center;
  margin-top: 1.5rem;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 999px;
  padding: 0.9rem 1.25rem;
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  line-height: 1.4;
  font-weight: 650;
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.05);
}

#sixty8-3d-experience .cta span { color: #8db2ff; }

#sixty8-3d-experience .progress {
  position: absolute;
  z-index: 7;
  right: clamp(1.25rem, 3vw, 3rem);
  top: 50%;
  width: 2px;
  height: min(34vh, 280px);
  transform: translateY(-50%);
  background: var(--line);
  overflow: hidden;
}

#sixty8-3d-experience #progress-bar {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 0%;
  background: #7ca9ff;
}

@media (min-width: 761px) and (max-width: 1100px) and (orientation: portrait) {
  #sixty8-3d-experience .idea-art {
    object-fit: cover;
    object-position: 50% 50%;
    -webkit-mask-image: radial-gradient(ellipse 98% 94% at 50% 46%, #000 62%, transparent 100%);
    mask-image: radial-gradient(ellipse 98% 94% at 50% 46%, #000 62%, transparent 100%);
  }

  #sixty8-3d-experience .chapter {
    left: clamp(2.5rem, 7vw, 4.75rem);
    bottom: 6.5vh;
    width: min(620px, calc(100vw - 5rem));
  }

  #sixty8-3d-experience .chapter h2 { font-size: clamp(3.75rem, 8.7vw, 5.65rem); }

  #sixty8-3d-experience .chapter p:not(.chapter-number) {
    max-width: 390px;
    font-size: 1.05rem;
  }

  #sixty8-3d-experience .chapter-final { bottom: 5.5vh; }

  #sixty8-3d-experience .cta {
    min-height: 56px;
    margin-top: 1.6rem;
    padding: 1rem 1.55rem;
    font-size: 1rem;
    gap: 0.9rem;
  }

  #sixty8-3d-experience .progress { right: 1.5rem; }
  #sixty8-3d-experience .callout-label { font-size: 0.57rem; }

  #sixty8-3d-experience .brand-ambient {
    left: -12%;
    top: -2%;
    width: 92%;
    height: 48%;
  }
}

@media (min-width: 761px) and (max-width: 820px) and (orientation: portrait) {
  #sixty8-3d-experience .callout-optional { display: none; }
}

@media (max-width: 760px) {
  #sixty8-3d-experience {
    height: 600vh;
    overflow-x: clip;
  }

  #sixty8-3d-experience .stage { height: 100svh; }

  #sixty8-3d-experience .chapter {
    left: max(1.25rem, env(safe-area-inset-left));
    right: max(1.25rem, env(safe-area-inset-right));
    bottom: max(2rem, calc(env(safe-area-inset-bottom) + 1rem));
    width: auto;
  }

  #sixty8-3d-experience .chapter h2 {
    margin-top: 0.4rem;
    font-size: clamp(2.45rem, 12.1vw, 3.35rem);
    line-height: 0.92;
  }

  #sixty8-3d-experience .chapter p:not(.chapter-number) {
    max-width: 34ch;
    margin-top: 0.8rem;
    font-size: clamp(0.92rem, 3.8vw, 1rem);
    line-height: 1.45;
  }

  #sixty8-3d-experience .chapter-final { bottom: max(1rem, env(safe-area-inset-bottom)); }

  #sixty8-3d-experience .cta {
    min-height: 52px;
    margin-top: 1rem;
    padding: 0.9rem 1.3rem;
    font-size: 0.96rem;
    pointer-events: auto;
  }

  #sixty8-3d-experience .progress {
    display: block;
    right: max(0.75rem, env(safe-area-inset-right));
    top: 40%;
    height: min(22vh, 150px);
  }

  #sixty8-3d-experience .technical-callout[data-callout="surface"],
  #sixty8-3d-experience .callout-optional { display: none; }

  #sixty8-3d-experience .callout-label {
    font-size: 0.5rem;
    letter-spacing: 0.12em;
  }

  #sixty8-3d-experience .idea-art {
    object-fit: cover;
    object-position: 50% 0%;
    -webkit-mask-image: none;
    mask-image: none;
  }

  #sixty8-3d-experience .idea-sketch {
    left: 50%;
    top: 35.5%;
    height: 32vh;
  }

  #sixty8-3d-experience .sketch-rough,
  #sixty8-3d-experience .sketch-construction { display: none; }

  #sixty8-3d-experience .brand-ambient {
    left: -20%;
    top: -4%;
    width: 105%;
    height: 48%;
    opacity: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  #sixty8-3d-experience { height: 140vh; }
  #sixty8-3d-experience .chapter:not(.chapter-final) { display: none; }
  #sixty8-3d-experience .chapter-final { opacity: 1 !important; transform: none !important; }
  #sixty8-3d-experience .technical-annotations { display: none; }
  #sixty8-3d-experience .idea-art { display: none; }
  #sixty8-3d-experience .idea-sketch { display: none; }
}