.odin-scroll-animation,
.odin-scroll-animation * { box-sizing: border-box; }

.odin-scroll-animation {
  position: relative;
  width: 100vw;
  height: 500vh;
  margin-left: calc(50% - 50vw);
  background: #000;
  color: #f6f6f6;
  font-family: Arial, Helvetica, sans-serif;
}

.odin-sticky-stage {
  position: sticky;
  top: 0;
  height: 100vh;
  min-height: 650px;
  overflow: hidden;
  isolation: isolate;
  background: radial-gradient(circle at 50% 55%, #111 0%, #050505 36%, #000 72%);
}

.odin-ambient-glow {
  position: absolute;
  inset: 15% 20%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,.055), transparent 66%);
  filter: blur(35px);
}

.odin-topline {
  position: absolute;
  z-index: 20;
  top: 34px;
  left: 48px;
  right: 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .36em;
}

.odin-chapter { color: #787878; letter-spacing: .18em; font-weight: 500; }

.odin-product-layer {
  position: absolute;
  z-index: 3;
  left: 50%;
  top: 50%;
  width: min(88vw, 1600px);
  height: min(78vh, 880px);
  object-fit: contain;
  transform-origin: center;
  translate: -50% -50%;
  will-change: opacity, transform;
  pointer-events: none;
}

.odin-case-layer { width: min(83vw, 1500px); height: min(64vh, 720px); }
.odin-open-layer { width: min(91vw, 1740px); height: min(70vh, 800px); z-index: 2; }
.odin-glasses-front { width: min(72vw, 1240px); height: min(48vh, 520px); z-index: 5; }
.odin-feature-layer { width: min(92vw, 1660px); height: min(82vh, 880px); }
.odin-bottom-layer { width: min(72vw, 1100px); height: min(82vh, 900px); }
.odin-mobile-labels { display: none; }

.odin-led-pulse {
  position: absolute;
  z-index: 8;
  left: 48.9%;
  top: 56.5%;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: white;
  box-shadow: 0 0 12px 3px rgba(255,255,255,.7);
  pointer-events: none;
}

.odin-scroll-cue {
  position: absolute;
  z-index: 20;
  bottom: 38px;
  left: 50%;
  translate: -50% 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: #9c9c9c;
  text-transform: uppercase;
  letter-spacing: .2em;
  font-size: 10px;
}

.odin-scroll-cue i { width: 1px; height: 28px; background: linear-gradient(#aaa, transparent); }
.odin-progress-track { position: absolute; z-index: 20; left: 48px; right: 48px; bottom: 22px; height: 1px; background: #202020; }
.odin-progress-track span { display: block; width: 100%; height: 100%; transform-origin: left center; background: #f5f5f5; }

@media (max-width: 900px) {
  .odin-scroll-animation { height: 600vh; }
  .odin-sticky-stage { min-height: 560px; }
  .odin-topline { top: 24px; left: 20px; right: 20px; font-size: 11px; }
  .odin-progress-track { left: 20px; right: 20px; bottom: 14px; }
  .odin-scroll-cue { bottom: 28px; }
  .odin-ambient-glow { inset: 20% 0; }
  .odin-product-layer { width: 112vw; height: 58vh; top: 43%; }
  .odin-case-layer { width: 112vw; height: 48vh; top: 44%; }
  .odin-open-layer { width: 122vw; height: 52vh; top: 44%; }
  .odin-glasses-front { width: 94vw; height: 36vh; top: 45%; }
  .odin-feature-layer { width: 138vw; height: 62vh; top: 38%; }
  .odin-bottom-layer { width: 106vw; height: 64vh; top: 39%; }
  .odin-led-pulse { left: 49%; top: 48%; width: 9px; height: 9px; }
  .odin-mobile-labels {
    position: absolute;
    z-index: 15;
    left: 18px;
    right: 18px;
    bottom: 72px;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
    pointer-events: none;
    will-change: opacity;
  }
  .odin-mobile-labels span {
    padding: 8px 11px;
    border: 1px solid rgba(255,255,255,.22);
    border-radius: 999px;
    background: rgba(5,5,5,.72);
    backdrop-filter: blur(10px);
    color: #f3f3f3;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: .08em;
    text-transform: uppercase;
  }
  .odin-labels-bottom { bottom: 82px; }
}

@media (prefers-reduced-motion: reduce) {
  .odin-product-layer { transition: none; }
}