:root {
  --museum-ink: #172019;
  --museum-cinnabar: #b9412f;
  --museum-gold: #c7a35d;
  --museum-ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* Lightweight opening: opacity and small transforms only. */
.museum-opening-lite {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: grid;
  place-items: center;
  color: #efe9dc;
  background: linear-gradient(135deg, #101713 0%, #18241d 58%, #111713 100%);
  opacity: 1;
  transform: translate3d(0, 0, 0);
  transition: opacity 480ms ease, transform 620ms var(--museum-ease);
}

.museum-opening-lite::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  background: linear-gradient(transparent, rgba(199, 163, 93, 0.5), transparent);
  transform: scaleY(0);
  animation: liteRule 620ms 180ms var(--museum-ease) forwards;
}

.museum-opening-lite.is-leaving {
  opacity: 0;
  transform: translate3d(0, -14px, 0);
  pointer-events: none;
}

.museum-opening-lite__inner {
  position: relative;
  z-index: 1;
  width: min(700px, calc(100% - 40px));
  text-align: center;
}

.museum-opening-lite__seal {
  display: grid;
  place-items: center;
  width: 68px;
  aspect-ratio: 1;
  margin: 0 auto 22px;
  border: 2px solid #d4664e;
  color: #efb49f;
  font-family: "STKaiti", "KaiTi", "Kaiti SC", serif;
  font-size: 2.4rem;
  opacity: 0;
  transform: scale(1.18);
  animation: liteSeal 500ms 120ms var(--museum-ease) forwards;
}

.museum-opening-lite__title {
  margin: 0;
  font-family: "STKaiti", "KaiTi", "Kaiti SC", serif;
  font-size: clamp(3.4rem, 7vw, 7rem);
  font-weight: 400;
  line-height: 0.98;
  letter-spacing: 0.06em;
  opacity: 0;
  transform: translate3d(0, 16px, 0);
  animation: liteRise 600ms 300ms var(--museum-ease) forwards;
}

.museum-opening-lite__title span {
  display: block;
  margin-top: 0.1em;
  color: #d0aa65;
}

.museum-opening-lite__caption {
  margin: 24px 0 0;
  color: rgba(239, 233, 220, 0.68);
  font-family: "FangSong", "STFangsong", serif;
  font-size: 0.92rem;
  letter-spacing: 0.3em;
  opacity: 0;
  animation: liteFade 420ms 680ms ease forwards;
}

.museum-opening-lite__skip {
  position: fixed;
  right: 22px;
  bottom: 20px;
  z-index: 2;
  min-width: 64px;
  min-height: 44px;
  border: 0;
  color: rgba(239, 233, 220, 0.7);
  background: transparent;
  font: 0.8rem/1 "FangSong", serif;
  letter-spacing: 0.16em;
  cursor: pointer;
}

.museum-opening-lite__skip:hover,
.museum-opening-lite__skip:focus-visible {
  color: #fff3dc;
  outline: 1px solid rgba(199, 163, 93, 0.5);
  outline-offset: 5px;
}

.museum-opening-active {
  overflow: hidden;
}

/* Editorial museum title: compact hierarchy, no oversized two-line block. */
.about-card .feature-copy {
  position: relative;
  max-width: 1140px;
  padding-top: clamp(58px, 6vw, 104px);
  padding-bottom: clamp(58px, 6vw, 104px);
}

.about-card .feature-copy::before {
  content: "";
  position: absolute;
  top: clamp(54px, 6vw, 100px);
  bottom: clamp(54px, 6vw, 100px);
  left: -22px;
  width: 1px;
  background: linear-gradient(var(--museum-cinnabar), rgba(185, 65, 47, 0.08));
  pointer-events: none;
}

#about-title {
  display: grid;
  grid-template-columns: max-content minmax(50px, 1fr);
  grid-template-areas:
    "kicker rule"
    "primary primary"
    "secondary secondary";
  column-gap: 20px;
  width: min(100%, 960px);
  max-width: none;
  margin: 0.3em 0 0.58em;
  font-size: initial;
  line-height: 1;
}

.about-title-kicker {
  grid-area: kicker;
  align-self: center;
  color: var(--museum-cinnabar);
  font-family: "FangSong", "STFangsong", serif;
  font-size: clamp(0.9rem, 1vw, 1.12rem);
  font-weight: 700;
  letter-spacing: 0.28em;
  white-space: nowrap;
}

.about-title-rule {
  grid-area: rule;
  align-self: center;
  height: 1px;
  background: linear-gradient(90deg, rgba(185, 65, 47, 0.75), transparent 72%);
}

.about-title-primary {
  position: relative;
  z-index: 1;
  grid-area: primary;
  width: max-content;
  max-width: 100%;
  margin-top: 0.13em;
  color: var(--museum-ink);
  font-family: "STKaiti", "KaiTi", "Kaiti SC", serif;
  font-size: clamp(4.8rem, 6.8vw, 8.5rem);
  font-weight: 400;
  line-height: 0.9;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.about-title-primary::after {
  content: attr(data-echo);
  position: absolute;
  z-index: -1;
  inset: 0 auto auto 0;
  color: transparent;
  -webkit-text-stroke: 1px rgba(185, 65, 47, 0.22);
  transform: translate(0.075em, 0.07em);
  pointer-events: none;
}

.about-title-secondary {
  grid-area: secondary;
  justify-self: end;
  margin-top: 0.18em;
  padding: 0 0.08em 0.14em 0.2em;
  border-bottom: 1px solid rgba(23, 32, 25, 0.35);
  color: #2b302a;
  font-family: "FangSong", "STFangsong", "Songti SC", serif;
  font-size: clamp(2.8rem, 4vw, 5.1rem);
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0.18em;
  white-space: nowrap;
}

.about-card .feature-copy > p:not(.eyebrow) {
  max-width: 54em;
  font-size: clamp(1.08rem, 1.18vw, 1.4rem);
  line-height: 1.88;
}

/* Lightweight reveal: no blur, no clip-path, no continuous texture animation. */
.motion-lite-ready .motion-lite-reveal {
  opacity: 0;
  transform: translate3d(0, 18px, 0);
  transition:
    opacity 520ms ease var(--motion-delay, 0ms),
    transform 620ms var(--museum-ease) var(--motion-delay, 0ms);
}

.motion-lite-ready .motion-lite-reveal.is-visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

.museum-scroll-progress-lite {
  position: fixed;
  z-index: 9998;
  top: 0;
  right: 0;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--museum-cinnabar), var(--museum-gold));
  transform: scaleX(0);
  transform-origin: left center;
  pointer-events: none;
}

/* One-shot hover feedback instead of pointer-follow repainting. */
.artifact-catalog-card {
  position: relative;
  isolation: isolate;
  transition: transform 220ms var(--museum-ease), border-color 220ms ease, box-shadow 220ms ease;
}

.artifact-catalog-card::after {
  content: "";
  position: absolute;
  z-index: 4;
  inset: 0;
  background: linear-gradient(108deg, transparent 34%, rgba(221, 184, 108, 0.14) 49%, transparent 64%);
  transform: translate3d(-120%, 0, 0);
  transition: transform 620ms var(--museum-ease);
  pointer-events: none;
}

.artifact-catalog-card:hover,
.artifact-catalog-card:focus-within {
  border-color: rgba(199, 163, 93, 0.58);
  box-shadow: 0 14px 32px rgba(7, 10, 8, 0.16);
  transform: translate3d(0, -4px, 0);
}

.artifact-catalog-card:hover::after,
.artifact-catalog-card:focus-within::after {
  transform: translate3d(120%, 0, 0);
}

.artifact-card-media img,
.treasure-main-image img,
.treasure-thumbs img {
  transition: transform 420ms var(--museum-ease);
}

.artifact-catalog-card:hover .artifact-card-media img,
.treasure-main-image:hover img,
.treasure-thumbs:hover img {
  transform: scale(1.025);
}

@keyframes liteRule {
  to { transform: scaleY(1); }
}

@keyframes liteSeal {
  from { opacity: 0; transform: scale(1.18); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes liteRise {
  from { opacity: 0; transform: translate3d(0, 16px, 0); }
  to { opacity: 1; transform: translate3d(0, 0, 0); }
}

@keyframes liteFade {
  to { opacity: 1; }
}

@media (max-width: 760px) {
  .museum-opening-lite__title {
    font-size: clamp(3.1rem, 16.5vw, 5rem);
  }

  .about-card .feature-copy {
    padding-top: 46px;
    padding-bottom: 52px;
  }

  .about-card .feature-copy::before {
    display: none;
  }

  #about-title {
    grid-template-columns: max-content minmax(28px, 1fr);
    column-gap: 10px;
    width: 100%;
  }

  .about-title-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.2em;
  }

  .about-title-primary {
    margin-top: 0.22em;
    font-size: clamp(4rem, 21vw, 5.7rem);
    letter-spacing: 0.01em;
  }

  .about-title-secondary {
    justify-self: start;
    margin-top: 0.3em;
    padding-left: 0;
    font-size: clamp(2.35rem, 11.8vw, 3.7rem);
    letter-spacing: 0.1em;
  }

  .about-card .feature-copy > p:not(.eyebrow) {
    font-size: 1.04rem;
    line-height: 1.76;
  }
}

@media (hover: none), (pointer: coarse) {
  .artifact-catalog-card::after {
    display: none;
  }

  .artifact-catalog-card:hover {
    transform: none;
    box-shadow: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .museum-opening-lite,
  .museum-scroll-progress-lite {
    display: none !important;
  }

  .motion-lite-ready .motion-lite-reveal,
  .motion-lite-ready .motion-lite-reveal.is-visible,
  .artifact-catalog-card,
  .artifact-catalog-card::after,
  .artifact-card-media img,
  .treasure-main-image img,
  .treasure-thumbs img {
    opacity: 1;
    transform: none;
    transition: none;
    animation: none;
  }
}