/* PPT 25–28: one visual proposition per frame. */
#p25.interaction-story--v46 {
  /* Primitive tokens */
  --i46-black: #000;
  --i46-panel: #1d1d1d;
  --i46-panel-alt: #202020;
  --i46-white: #f4f4f4;
  --i46-gray: #8b8b8f;
  --i46-gray-deep: #4b4b4f;
  --i46-rule: rgb(255 255 255 / .18);

  /* Semantic tokens */
  --i46-surface-calm: var(--i46-black);
  --i46-surface-principle: var(--i46-panel);
  --i46-text-primary: var(--i46-white);
  --i46-text-quiet: var(--i46-gray);
  --i46-text-connector: var(--i46-gray-deep);
  --i46-motion-composed: cubic-bezier(.22, .76, .2, 1);

  /* Component tokens */
  --i46-gutter: clamp(30px, 4.2vw, 80px);
  --i46-small: clamp(11px, .78vw, 14px);
  --i46-display: clamp(72px, 8.4vw, 150px);

  background: var(--i46-surface-calm) !important;
}

#p25.interaction-story--v46 .interaction-story__sticky {
  padding: clamp(24px, 2.4vw, 42px) var(--i46-gutter) clamp(26px, 2.8vw, 46px);
  background: var(--i46-surface-calm);
}

#p25.interaction-story--v46 .interaction-story__masthead {
  grid-template-columns: minmax(190px, 1fr) minmax(520px, 1.5fr);
  min-height: 54px;
  background: transparent;
}

#p25.interaction-story--v46 .interaction-story__masthead-left {
  opacity: .62;
}

#p25.interaction-story--v46 .interaction-story__status {
  margin-top: 3px;
  color: var(--i46-text-quiet);
  text-transform: none;
}

#p25.interaction-story--v46 .interaction-story__steps {
  grid-column: 2;
  gap: clamp(18px, 2.5vw, 48px);
}

#p25.interaction-story--v46 .interaction-story__steps button {
  color: var(--i46-text-connector);
  font-size: var(--i46-small);
  font-weight: 400;
}

#p25.interaction-story--v46 .interaction-story__steps button[aria-current='step'] {
  color: var(--i46-text-primary);
}

#p25.interaction-story--v46 .interaction-story__stage {
  inset: clamp(108px, 12vh, 136px) var(--i46-gutter) clamp(42px, 5.8vh, 66px);
}

#p25.interaction-story--v46 .interaction-story__act {
  display: block;
  transform: translate3d(0, 22px, 0);
  transition:
    opacity 420ms ease,
    transform 560ms var(--i46-motion-composed),
    visibility 0s linear 420ms;
}

#p25.interaction-story--v46 .interaction-story__act.is-current {
  transform: translate3d(0, 0, 0);
}

.interaction-v46__unity {
  position: relative;
  height: 100%;
}

.interaction-v46__formula {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: clamp(18px, 2.6vw, 48px);
  padding-top: clamp(90px, 13vh, 150px);
  white-space: nowrap;
}

.interaction-v46__term h2,
.interaction-v46__connector {
  margin: 0;
  font-size: var(--i46-display);
  line-height: .9;
  font-weight: 400;
  letter-spacing: -.07em;
}

.interaction-v46__term h2 {
  color: var(--i46-text-primary);
}

.interaction-v46__connector {
  color: var(--i46-text-connector);
}

.interaction-v46__term p {
  margin: clamp(20px, 3vh, 34px) 0 0;
  color: var(--i46-text-quiet);
  font-size: clamp(13px, .95vw, 17px);
  line-height: 1.7;
  text-align: center;
}

.interaction-v46__term p b {
  color: var(--i46-text-connector);
  font-weight: 400;
}

.interaction-v46__note {
  position: absolute;
  bottom: clamp(4px, 1.2vh, 16px);
  left: 0;
  max-width: 44ch;
}

.interaction-v46__note p,
.interaction-v46__note strong {
  display: block;
  margin: 0;
  font-size: var(--i46-small);
  line-height: 1.65;
}

.interaction-v46__note p { color: var(--i46-text-quiet); }
.interaction-v46__note strong {
  margin-top: 14px;
  color: var(--i46-text-primary);
  font-weight: 400;
}

.interaction-v46__duality {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(18px, 2.2vw, 36px);
  height: 100%;
}

.interaction-v46__panel {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-width: 0;
  padding: clamp(34px, 4.2vh, 58px) clamp(32px, 3.5vw, 60px);
  background: var(--i46-surface-principle);
}

.interaction-v46__panel:nth-child(2) { background: var(--i46-panel-alt); }

.interaction-v46__panel header p,
.interaction-v46__panel header span,
.interaction-v46__quality-grid span,
.interaction-v46__quality-grid p,
.interaction-v46__adaptive p,
.interaction-v46__adaptive-grid span {
  margin: 0;
  color: var(--i46-text-quiet);
  font-size: var(--i46-small);
  line-height: 1.55;
}

.interaction-v46__panel header h2 {
  margin: 8px 0 12px;
  color: var(--i46-text-primary);
  font-size: clamp(56px, 5.6vw, 102px);
  line-height: .95;
  font-weight: 400;
  letter-spacing: -.06em;
}

.interaction-v46__quality-grid,
.interaction-v46__adaptive-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(14px, 1.7vw, 28px);
  padding-top: clamp(22px, 3vh, 36px);
  border-top: 1px solid var(--i46-rule);
}

.interaction-v46__quality-grid { align-self: end; }
.interaction-v46__quality-grid article,
.interaction-v46__adaptive-grid article {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.interaction-v46__quality-grid strong,
.interaction-v46__adaptive-grid strong,
.interaction-v46__adaptive > strong {
  color: var(--i46-text-primary);
  font-size: clamp(14px, .95vw, 17px);
  font-weight: 500;
}

.interaction-v46__quality-grid p { margin-top: 12px; }

.interaction-v46__adaptive {
  align-self: center;
  padding: clamp(26px, 4vh, 50px) 0;
}

.interaction-v46__adaptive > strong {
  display: block;
  margin-bottom: 12px;
  font-size: clamp(22px, 2vw, 34px);
  font-weight: 400;
}

.interaction-v46__adaptive p { max-width: 36ch; }

.interaction-v46__chain {
  display: grid;
  gap: clamp(14px, 2vh, 24px);
  height: 100%;
  align-content: center;
}

.interaction-v46__chain section {
  display: grid;
  grid-template-columns: minmax(150px, 18%) 1fr;
  align-items: center;
  min-height: clamp(126px, 17vh, 170px);
  padding: clamp(22px, 3vh, 34px) clamp(30px, 3.5vw, 58px);
  border-radius: clamp(24px, 2.8vw, 48px);
  background: var(--i46-panel);
}

.interaction-v46__chain p,
.interaction-v46__chain strong,
.interaction-v46__chain span {
  margin: 0;
}

.interaction-v46__chain section > p {
  color: var(--i46-text-primary);
  font-size: clamp(15px, 1vw, 18px);
}

.interaction-v46__chain section > div {
  display: grid;
  grid-template-columns: minmax(260px, 34%) 1fr;
  align-items: baseline;
  gap: clamp(22px, 3vw, 50px);
}

.interaction-v46__chain strong {
  color: var(--i46-text-primary);
  font-size: clamp(28px, 2.8vw, 52px);
  line-height: 1;
  font-weight: 400;
  letter-spacing: -.04em;
}

.interaction-v46__chain span {
  color: var(--i46-text-quiet);
  font-size: var(--i46-small);
  line-height: 1.6;
}

.interaction-v46__chain span b {
  color: var(--i46-text-primary);
  font-weight: 400;
}

.interaction-v46__exploration {
  display: grid;
  grid-template-rows: auto auto 1fr;
  gap: clamp(20px, 2.8vh, 34px);
  height: 100%;
}

.interaction-v46__exploration > h2 {
  margin: 0;
  color: var(--i46-text-primary);
  font-size: clamp(28px, 2.5vw, 44px);
  line-height: 1;
  font-weight: 400;
  letter-spacing: -.03em;
  text-align: center;
}

.interaction-v46__keywords {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(30px, 7vw, 120px);
  max-width: 980px;
  margin: 0 auto;
}

.interaction-v46__keywords div {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 20px;
}

.interaction-v46__keywords dt,
.interaction-v46__keywords dd {
  margin: 0;
  font-size: var(--i46-small);
  line-height: 1.55;
}

.interaction-v46__keywords dt { color: var(--i46-text-primary); }
.interaction-v46__keywords dd { color: var(--i46-text-quiet); }

.interaction-v46__motion-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(8px, .8vw, 14px);
  min-height: 0;
}

.interaction-v46__motion-item {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  gap: 10px;
  min-width: 0;
  min-height: 0;
  margin: 0;
}

.interaction-v46__motion-item video {
  width: 100%;
  height: 100%;
  min-height: 0;
  object-fit: cover;
  background: var(--i46-panel);
}

.interaction-v46__motion-item figcaption {
  display: flex;
  gap: 10px;
  color: var(--i46-text-quiet);
  font-size: clamp(9px, .65vw, 12px);
  line-height: 1.35;
}

.interaction-v46__motion-item figcaption strong {
  color: var(--i46-text-primary);
  font-weight: 400;
}

#p25.interaction-story--v46 .interaction-story__progress {
  background: rgb(255 255 255 / .12);
}

#p25.interaction-story--v46 .interaction-story__progress span {
  background: var(--i46-text-primary);
}

@media (max-width: 1100px) and (min-width: 761px) {
  #p25.interaction-story--v46 .interaction-story__masthead {
    grid-template-columns: 160px 1fr;
  }
  .interaction-v46__formula { gap: 18px; }
  .interaction-v46__panel { padding: 28px; }
  .interaction-v46__quality-grid { gap: 10px; }
  .interaction-v46__chain section > div {
    grid-template-columns: minmax(220px, 38%) 1fr;
  }
}

@media (max-width: 760px) {
  #p25.interaction-story--v46 {
    min-height: auto !important;
  }

  #p25.interaction-story--v46 .interaction-story__sticky {
    height: auto;
    min-height: 0;
    padding: 28px 20px 54px;
  }

  #p25.interaction-story--v46 .interaction-story__masthead {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  #p25.interaction-story--v46 .interaction-story__steps {
    grid-column: 1;
    gap: 8px;
    overflow-x: auto;
  }

  #p25.interaction-story--v46 .interaction-story__steps button {
    justify-content: flex-start;
    min-width: max-content;
  }

  #p25.interaction-story--v46 .interaction-story__stage {
    position: static;
    margin-top: 56px;
  }

  #p25.interaction-story--v46 .interaction-story__act {
    position: relative;
    inset: auto;
    min-height: auto;
    padding: 70px 0;
  }

  .interaction-v46__formula {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    justify-items: center;
    gap: 16px 10px;
    padding-top: 0;
    white-space: normal;
  }

  .interaction-v46__term h2,
  .interaction-v46__connector {
    font-size: clamp(44px, 14vw, 58px);
  }

  .interaction-v46__term h2 { white-space: nowrap; }

  .interaction-v46__formula > .interaction-v46__connector:nth-of-type(2) {
    grid-column: 1;
    grid-row: 2;
    justify-self: end;
    align-self: center;
  }

  .interaction-v46__term--result {
    grid-column: 2 / 4;
    grid-row: 2;
    justify-self: start;
    margin-top: 16px;
  }

  .interaction-v46__note {
    position: static;
    margin-top: 64px;
  }

  .interaction-v46__duality {
    grid-template-columns: 1fr;
    height: auto;
  }

  .interaction-v46__panel {
    min-height: 560px;
    padding: 32px 24px;
  }

  .interaction-v46__quality-grid,
  .interaction-v46__adaptive-grid {
    grid-template-columns: 1fr;
  }

  .interaction-v46__chain { height: auto; }
  .interaction-v46__chain section {
    grid-template-columns: 1fr;
    gap: 28px;
    min-height: 230px;
    padding: 30px 26px;
    border-radius: 28px;
  }

  .interaction-v46__chain section > div {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .interaction-v46__exploration {
    height: auto;
    gap: 34px;
  }

  .interaction-v46__keywords {
    grid-template-columns: 1fr;
    gap: 18px;
    width: 100%;
  }

  .interaction-v46__motion-grid {
    grid-template-columns: 1fr 1fr;
  }

  .interaction-v46__motion-item video {
    aspect-ratio: 3 / 4;
  }
}

@media (prefers-reduced-motion: reduce) {
  #p25.interaction-story--v46 .interaction-story__act {
    transition: none;
    transform: none;
  }
}