/* HCTU gallery — exhibition wall + portal viewer */

.gallery-expo {
  position: relative;
  padding: 28px 0 clamp(72px, 9vw, 120px);
  overflow: clip;
}

.gallery-expo-glow {
  pointer-events: none;
  position: absolute;
  inset: 0;
  background:
    radial-gradient(900px 420px at 12% 0%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 60%),
    radial-gradient(720px 380px at 92% 18%, color-mix(in srgb, var(--lime) 12%, transparent), transparent 62%),
    repeating-linear-gradient(90deg, color-mix(in srgb, var(--border) 70%, transparent) 0 1px, transparent 1px 56px);
  mask-image: linear-gradient(180deg, transparent, #000 12%, #000 86%, transparent);
}

.gallery-expo-inner {
  position: relative;
  max-width: min(1380px, calc(100vw - 24px));
  margin: 0 auto;
  padding: 0 clamp(12px, 2vw, 20px);
}

.expo-toolbar {
  display: flex;
  justify-content: center;
  margin-bottom: 28px;
}

.expo-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  padding: 6px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--panel) 78%, transparent);
  border: 1px solid var(--border);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-sm);
}

.expo-filter {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 0;
  background: transparent;
  color: var(--text-muted);
  padding: 8px 14px;
  border-radius: 999px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.expo-filter em {
  font-style: normal;
  font-size: 0.72rem;
  min-width: 1.4em;
  padding: 1px 6px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--soft) 80%, transparent);
}

.expo-filter:hover {
  color: var(--text);
  transform: translateY(-1px);
}

.expo-filter.is-on {
  background: var(--lime);
  color: #071428;
}

.expo-filter.is-on em {
  background: rgba(7, 20, 40, 0.16);
  color: #071428;
}

[data-theme="dark"] .expo-filter.is-on {
  background: var(--lime);
  color: #071428;
}

.expo-wall {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  grid-auto-rows: 72px;
  grid-auto-flow: dense;
  gap: 14px;
  perspective: 1600px;
}

.expo-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  cursor: pointer;
  transform-style: preserve-3d;
  transition: transform 0.35s ease, opacity 0.28s ease, filter 0.28s ease;
}

.expo-card[hidden] {
  display: none !important;
}

.expo-card[data-kind="image"] {
  grid-column: span 4;
  grid-row: span 5;
}

.expo-card[data-kind="image"]:nth-child(7n + 1) {
  grid-column: span 8;
  grid-row: span 7;
}

.expo-card[data-kind="image"]:nth-child(5n + 3) {
  grid-column: span 5;
  grid-row: span 6;
}

.expo-card[data-kind="video"] {
  grid-column: span 7;
  grid-row: span 6;
}

.expo-card[data-kind="gif"] {
  grid-column: span 4;
  grid-row: span 5;
}

.expo-card[data-kind="svg"] {
  grid-column: span 4;
  grid-row: span 6;
}

.expo-mat {
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
  border-radius: 22px;
  padding: 9px;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--panel) 92%, #fff), var(--panel));
  border: 1px solid color-mix(in srgb, var(--border) 80%, transparent);
  box-shadow:
    var(--shadow-md),
    inset 0 1px 0 rgba(255, 255, 255, 0.35);
  transform: rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)) translateZ(0);
  transform-style: preserve-3d;
  transition: transform 0.18s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}

.expo-card:hover .expo-mat,
.expo-card:focus-visible .expo-mat {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  box-shadow:
    0 22px 48px rgba(7, 20, 40, 0.16),
    0 0 0 1px color-mix(in srgb, var(--accent) 30%, transparent);
}

.expo-media {
  position: relative;
  height: 100%;
  min-height: 160px;
  overflow: hidden;
  border-radius: 14px;
  background: #0b1522;
}

.expo-media img,
.expo-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transform: scale(1.02);
  transition: transform 0.7s cubic-bezier(0.16, 1, 0.3, 1), filter 0.4s ease;
}

.expo-card[data-kind="svg"] .expo-media,
.expo-card[data-kind="gif"] .expo-media {
  background-color: #f3f6fb;
  background-image:
    linear-gradient(45deg, #e4eaf3 25%, transparent 25%),
    linear-gradient(-45deg, #e4eaf3 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #e4eaf3 75%),
    linear-gradient(-45deg, transparent 75%, #e4eaf3 75%);
  background-size: 18px 18px;
  background-position: 0 0, 0 9px, 9px -9px, -9px 0;
}

.expo-card[data-kind="svg"] .expo-media img,
.expo-card[data-kind="gif"] .expo-media img {
  object-fit: contain;
  padding: 12px;
  background: transparent;
}

.expo-card:hover .expo-media img,
.expo-card:hover .expo-media video,
.expo-card:focus-visible .expo-media img,
.expo-card:focus-visible .expo-media video {
  transform: scale(1.08);
}

.expo-kind {
  position: absolute;
  top: 18px;
  inset-inline-start: 18px;
  z-index: 2;
  padding: 4px 9px;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #fff;
  background: rgba(7, 20, 40, 0.72);
  backdrop-filter: blur(10px);
}

.expo-kind[data-kind="gif"] {
  background: rgba(143, 212, 0, 0.92);
  color: #071428;
}

.expo-kind[data-kind="svg"] {
  background: rgba(0, 194, 224, 0.9);
  color: #071428;
}

.expo-kind[data-kind="video"] {
  background: rgba(26, 92, 255, 0.9);
}

.expo-play {
  position: absolute;
  inset: 50% auto auto 50%;
  transform: translate(-50%, -50%);
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(7, 20, 40, 0.72);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(8px);
  transition: transform 0.25s ease, background 0.25s ease;
}

.expo-play svg {
  width: 20px;
  height: 20px;
  margin-inline-start: 2px;
}

.expo-card:hover .expo-play {
  transform: translate(-50%, -50%) scale(1.08);
  background: rgba(143, 212, 0, 0.92);
  color: #071428;
}

.expo-meta {
  padding: 12px 8px 4px;
}

.expo-meta strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.02rem;
  letter-spacing: -0.02em;
}

.expo-meta p {
  margin-top: 4px;
  color: var(--text-muted);
  font-size: 0.86rem;
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.expo-open {
  display: inline-flex;
  margin-top: 8px;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.22s ease, transform 0.22s ease;
}

.expo-card:hover .expo-open,
.expo-card:focus-visible .expo-open {
  opacity: 1;
  transform: none;
}

.expo-empty {
  text-align: center;
  color: var(--text-muted);
  padding: 48px 16px;
}

/* Portal — cinematic media stage */
.portal {
  position: fixed;
  inset: 0;
  width: 100%;
  max-width: none;
  height: 100%;
  max-height: none;
  margin: 0;
  padding: 0;
  border: 0;
  overflow: hidden;
  background: #05070c;
  color: #fff;
}

.portal::backdrop {
  background: #05070c;
}

.portal-sky,
.portal-bloom {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.portal-sky {
  background:
    radial-gradient(1200px 600px at 50% 120%, rgba(0, 194, 224, 0.16), transparent 55%),
    radial-gradient(800px 480px at 80% 0%, rgba(143, 212, 0, 0.1), transparent 50%),
    linear-gradient(180deg, #05070c, #071018 48%, #0a1422);
}

.portal-sky::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.18;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.45'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

.portal-bloom {
  background: radial-gradient(circle at var(--x, 50%) var(--y, 50%), rgba(0, 194, 224, 0.34), transparent 34%);
  opacity: 0;
}

.portal.is-on .portal-bloom {
  animation: portal-bloom 900ms ease forwards;
}

@keyframes portal-bloom {
  0% { opacity: 0; transform: scale(0.4); }
  35% { opacity: 1; }
  100% { opacity: 0.55; transform: scale(1.2); }
}

.portal-close,
.portal-nav {
  position: absolute;
  z-index: 5;
  border: 0;
  cursor: pointer;
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(12px);
}

.portal-close {
  top: max(16px, env(safe-area-inset-top));
  inset-inline-end: 18px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  font-size: 1.7rem;
  line-height: 1;
}

.portal-nav {
  top: 50%;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  transform: translateY(-50%);
}

.portal-nav::before {
  content: "";
  display: block;
  width: 12px;
  height: 12px;
  margin: 0 auto;
  border-inline-start: 2px solid currentColor;
  border-block-end: 2px solid currentColor;
}

.portal-prev {
  inset-inline-start: 16px;
}

.portal-next {
  inset-inline-end: 16px;
}

.portal-prev::before {
  transform: rotate(45deg);
}

html[dir="ltr"] .portal-prev::before {
  transform: rotate(45deg);
}

.portal-next::before {
  transform: rotate(-135deg);
}

html[dir="rtl"] .portal-prev::before {
  transform: rotate(-135deg);
}

html[dir="rtl"] .portal-next::before {
  transform: rotate(45deg);
}

.portal-stage {
  position: absolute;
  inset: 52px 12px 64px;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.portal-vitrine {
  position: relative;
  pointer-events: auto;
  width: auto;
  height: auto;
  max-width: calc(100vw - 24px);
  max-height: calc(100dvh - 120px);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border-radius: 22px;
  overflow: hidden;
  background: #0b1018;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.08),
    0 40px 90px rgba(0, 0, 0, 0.45),
    0 0 80px rgba(0, 194, 224, 0.12);
  transform-origin: center center;
}

.portal-vitrine.is-svg,
.portal-vitrine.is-gif {
  background-color: #101821;
  background-image:
    linear-gradient(45deg, #1a2430 25%, transparent 25%),
    linear-gradient(-45deg, #1a2430 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #1a2430 75%),
    linear-gradient(-45deg, transparent 75%, #1a2430 75%);
  background-size: 24px 24px;
  background-position: 0 0, 0 12px, 12px -12px, -12px 0;
}

.portal-vitrine img,
.portal-vitrine video {
  display: block;
  width: auto;
  height: auto;
  max-width: calc(100vw - 32px);
  max-height: calc(100dvh - 128px);
  object-fit: contain;
  background: transparent;
  transform-origin: center center;
}

.portal-vitrine.is-video video {
  width: min(1100px, calc(100vw - 32px));
  height: auto;
  max-height: calc(100dvh - 128px);
  background: #000;
}

.portal-vitrine [hidden] {
  display: none !important;
}

.portal-dock {
  position: absolute;
  inset-inline: 16px;
  bottom: 12px;
  z-index: 3;
  display: flex;
  align-items: end;
  gap: 16px;
  pointer-events: none;
}

.portal-index {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 4.4rem);
  line-height: 0.8;
  letter-spacing: -0.06em;
  color: rgba(255, 255, 255, 0.18);
  min-width: 4.2ch;
}

.portal-copy {
  min-width: 0;
}

.portal-kind {
  display: inline-block;
  margin-bottom: 6px;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime);
}

.portal-copy h2 {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.4vw, 1.8rem);
  letter-spacing: -0.03em;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.55);
}

.portal-copy p {
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.72);
  max-width: 42rem;
  line-height: 1.6;
}

.portal-hint {
  display: block;
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.38);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.68rem;
}

.portal-strip {
  display: none;
}

.portal-strip::-webkit-scrollbar {
  display: none;
}

.portal-thumb {
  flex: 0 0 auto;
  width: 54px;
  height: 36px;
  padding: 0;
  border: 0;
  border-radius: 8px;
  overflow: hidden;
  opacity: 0.45;
  cursor: pointer;
  background: #111;
  outline: 1px solid rgba(255, 255, 255, 0.08);
}

.portal-thumb.is-on {
  opacity: 1;
  outline: 2px solid var(--lime);
}

.portal-thumb img,
.portal-thumb video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.portal[open] .portal-vitrine {
  animation: portal-rise 420ms cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes portal-rise {
  from {
    opacity: 0.4;
    transform: translateY(16px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 1100px) {
  .expo-wall {
    grid-template-columns: repeat(8, minmax(0, 1fr));
    grid-auto-rows: 64px;
  }

  .expo-card[data-kind="image"],
  .expo-card[data-kind="gif"],
  .expo-card[data-kind="svg"] {
    grid-column: span 4;
    grid-row: span 5;
  }

  .expo-card[data-kind="image"]:nth-child(7n + 1),
  .expo-card[data-kind="video"] {
    grid-column: span 8;
    grid-row: span 6;
  }

  .portal-stage {
    inset: 48px 8px 56px;
  }

  .portal-dock {
    inset-inline: 12px;
  }

  .portal-nav {
    top: auto;
    bottom: 18px;
    transform: none;
    width: 42px;
    height: 42px;
  }
}

@media (max-width: 700px) {
  .expo-filters {
    border-radius: 18px;
  }

  .expo-wall {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-auto-rows: 110px;
    gap: 10px;
  }

  .expo-card[data-kind],
  .expo-card[data-kind="image"]:nth-child(7n + 1),
  .expo-card[data-kind="image"]:nth-child(5n + 3),
  .expo-card[data-kind="video"] {
    grid-column: span 1;
    grid-row: span 2;
  }

  .expo-card:nth-child(3n + 1) {
    grid-column: span 2;
    grid-row: span 3;
  }

  .expo-meta p,
  .expo-open {
    display: none;
  }

  .portal-index {
    display: none;
  }

  .portal-dock {
    bottom: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .expo-card,
  .expo-mat,
  .expo-media img,
  .expo-media video,
  .portal-vitrine,
  .portal-bloom {
    animation: none !important;
    transition: none !important;
    transform: none !important;
  }
}

[data-theme="dark"] .expo-card[data-kind="svg"] .expo-media,
[data-theme="dark"] .expo-card[data-kind="gif"] .expo-media {
  background-color: #101821;
  background-image:
    linear-gradient(45deg, #1a2430 25%, transparent 25%),
    linear-gradient(-45deg, #1a2430 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #1a2430 75%),
    linear-gradient(-45deg, transparent 75%, #1a2430 75%);
}