/* ─── Design Tokens ─────────────────────────────────────────────── */
:root {
  --bg:            #080a0c;
  --bg-panel:      #0d1014;
  --bg-overlay:    rgba(5, 7, 9, 0.94);
  --line:          rgba(255, 255, 255, 0.07);
  --line-bright:   rgba(255, 255, 255, 0.18);
  --accent:        #00e5ff;
  --accent-dim:    rgba(0, 229, 255, 0.15);
  --accent-glow:   rgba(0, 229, 255, 0.06);
  --text-primary:  #e8eaed;
  --text-secondary:#7a8694;
  --text-label:    #3d5166;
  --font-mono:     'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  --font-display:  'Space Grotesk', 'Inter', system-ui, sans-serif;
  --gap:           2px;
  --panel-width:   360px;
  --ease-out:      cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in:       cubic-bezier(0.7, 0, 0.84, 0);
}

/* ─── Reset ─────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 14px; -webkit-font-smoothing: antialiased; }
body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-mono);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ─── Noise texture overlay ──────────────────────────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.6;
}

/* ─── Typography ─────────────────────────────────────────────────── */
h1, h2, h3 { font-weight: 700; letter-spacing: 0.12em; }
p { line-height: 1.6; }

/* ─── Header ─────────────────────────────────────────────────────── */
#museum-header {
  padding: 72px 48px 56px;
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}

#museum-header::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.4;
}

.header-inner {
  max-width: 960px;
}

.header-top-bar {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--text-label);
  margin-bottom: 32px;
}

#museum-title {
  font-family: var(--font-mono);
  font-size: clamp(2.8rem, 8vw, 6rem);
  font-weight: 700;
  letter-spacing: 0.25em;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 16px;
  text-shadow: 0 0 60px rgba(0, 229, 255, 0.12);
}

#museum-subtitle {
  font-size: 11px;
  letter-spacing: 0.25em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 20px;
}

#museum-description {
  font-family: var(--font-display, var(--font-mono));
  font-size: 13px;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 40px;
}

.header-pipeline {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.pipeline-node {
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--text-label);
  border: 1px solid var(--line);
  padding: 4px 10px;
  transition: color 200ms, border-color 200ms;
}

.pipeline-node.active {
  color: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

.pipeline-arrow {
  font-size: 11px;
  color: var(--text-label);
}

/* ─── Gallery ─────────────────────────────────────────────────────── */
#gallery {
  padding: 0;
}

.set-block {
  margin-bottom: 64px;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 600ms var(--ease-out), transform 600ms var(--ease-out);
}

.set-block.visible {
  opacity: 1;
  transform: translateY(0);
}

.set-header {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 20px;
  padding: 20px 48px 14px;
  border-top: 1px solid var(--line);
}

.set-number {
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--text-label);
  flex-shrink: 0;
}

.set-title {
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--text-secondary);
  text-transform: uppercase;
  flex-shrink: 0;
}

.set-prompt {
  font-size: 9px;
  letter-spacing: 0.06em;
  line-height: 1.7;
  color: var(--accent);
  border: 1px solid var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
  padding: 4px 10px;
  flex: 1 1 320px;
}

.set-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gap);
}

/* ─── Thumbnail card ──────────────────────────────────────────────── */
.thumb-card {
  aspect-ratio: 1 / 1;
  overflow: hidden;
  position: relative;
  cursor: pointer;
  background: #0a0c0e;
}

.thumb-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 500ms var(--ease-out), filter 500ms var(--ease-out);
  filter: saturate(0.55) brightness(0.8);
}

.thumb-card:hover img,
.thumb-card:focus-visible img {
  transform: scale(1.04);
  filter: saturate(1) brightness(1);
}

.thumb-card:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: -1px;
}

.thumb-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(0,0,0,0.6) 100%);
  z-index: 1;
  opacity: 0;
  transition: opacity 400ms;
}

.thumb-card:hover::before {
  opacity: 1;
}

.thumb-card::after {
  content: attr(data-id);
  position: absolute;
  bottom: 10px;
  left: 12px;
  font-size: 9px;
  letter-spacing: 0.18em;
  color: rgba(255, 255, 255, 0.3);
  z-index: 2;
  pointer-events: none;
  transition: color 300ms;
}

.thumb-card:hover::after {
  color: var(--accent);
}

.thumb-title-hint {
  position: absolute;
  bottom: 10px;
  right: 12px;
  font-size: 9px;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0);
  z-index: 2;
  pointer-events: none;
  max-width: 55%;
  text-align: right;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color 300ms 50ms;
}

.thumb-card:hover .thumb-title-hint {
  color: rgba(255, 255, 255, 0.55);
}

/* ─── Review card (set 10) ───────────────────────────────────────── */
.review-card {
  aspect-ratio: 1 / 1;
  overflow: hidden;
  position: relative;
  cursor: pointer;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  transition: border-color 200ms, background 200ms;
}

.review-card:hover,
.review-card:focus-visible {
  border-color: var(--accent);
  background: var(--accent-glow);
}

.review-card:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: -1px;
}

.review-card-label {
  font-size: 8px;
  letter-spacing: 0.25em;
  color: var(--text-label);
  text-transform: uppercase;
}

.review-card-reviewer {
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--text-secondary);
  text-align: center;
  padding: 0 16px;
  transition: color 200ms;
}

.review-card:hover .review-card-reviewer,
.review-card:focus-visible .review-card-reviewer {
  color: var(--accent);
}

.review-card-preview {
  font-size: 8px;
  letter-spacing: 0.05em;
  line-height: 1.6;
  color: var(--text-label);
  text-align: center;
  padding: 0 20px;
  max-height: 52px;
  overflow: hidden;
  opacity: 0;
  transition: opacity 200ms;
}

.review-card:hover .review-card-preview {
  opacity: 1;
}

/* ─── Lightbox reviewer display ──────────────────────────────────── */
#lightbox-reviewer-display {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  text-align: center;
  padding: 48px;
}

#lightbox.is-review #lightbox-img {
  display: none;
}

#lightbox.is-review #lightbox-reviewer-display {
  display: flex;
}

.reviewer-display-label {
  font-size: 9px;
  letter-spacing: 0.25em;
  color: var(--text-label);
  text-transform: uppercase;
}

.reviewer-display-accent {
  width: 60px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.reviewer-display-name {
  font-family: var(--font-mono);
  font-size: clamp(1.2rem, 3.5vw, 2.2rem);
  letter-spacing: 0.15em;
  font-weight: 700;
  color: var(--text-primary);
  text-shadow: 0 0 40px rgba(0, 229, 255, 0.18);
}

/* ─── Footer ─────────────────────────────────────────────────────── */
#museum-footer {
  border-top: 1px solid var(--line);
  padding: 48px 48px 64px;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}

.footer-thanks {
  font-size: 10px;
  letter-spacing: 0.1em;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 520px;
}

.footer-credit {
  font-size: 9px;
  letter-spacing: 0.18em;
  color: var(--text-label);
}

.footer-built {
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--accent);
  border: 1px solid var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
  padding: 4px 10px;
  text-decoration: none;
  transition: box-shadow 200ms;
}

.footer-built:hover {
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.2);
}

/* ─── Lightbox ─────────────────────────────────────────────────────── */
#lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: var(--bg-overlay);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

#lightbox.is-open {
  display: flex;
  animation: lb-fade-in 180ms ease forwards;
}

@keyframes lb-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

#lightbox-image-wrap {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  padding: 48px;
}

#lightbox-img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  display: block;
}

#lightbox-hud-id {
  position: absolute;
  top: 16px;
  left: 20px;
  font-size: 9px;
  letter-spacing: 0.22em;
  color: var(--text-label);
}

/* ─── Metadata panel ──────────────────────────────────────────────── */
#lightbox-panel {
  width: var(--panel-width);
  flex-shrink: 0;
  background: var(--bg-panel);
  border-left: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  padding: 40px 28px 28px;
  overflow-y: auto;
  transform: translateX(100%);
  opacity: 0;
  transition: transform 380ms var(--ease-out), opacity 300ms ease;
  position: relative;
}

#lightbox-panel::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0.5;
}

#lightbox.panel-ready #lightbox-panel {
  transform: translateX(0);
  opacity: 1;
}

.panel-section {
  margin-bottom: 28px;
}

.panel-label {
  font-size: 8px;
  letter-spacing: 0.25em;
  color: var(--text-label);
  margin-bottom: 8px;
  text-transform: uppercase;
}

.panel-value {
  font-size: 12px;
  line-height: 1.65;
  color: var(--text-primary);
  white-space: pre-wrap;
}

#panel-title.panel-value {
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  font-weight: 600;
}

.panel-footer {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

#panel-meta {
  font-size: 9px;
  letter-spacing: 0.18em;
  color: var(--text-label);
}

.panel-authors {
  font-size: 8px;
  letter-spacing: 0.14em;
  color: var(--text-label);
  opacity: 0.6;
}

/* ─── Lightbox nav buttons ────────────────────────────────────────── */
#lightbox-close,
#lightbox-prev,
#lightbox-next {
  position: fixed;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text-secondary);
  cursor: pointer;
  font-family: var(--font-mono);
  transition: color 200ms, border-color 200ms, background 200ms;
  z-index: 1001;
}

#lightbox-close,
#lightbox-prev,
#lightbox-next {
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

#lightbox-close:hover,
#lightbox-prev:hover,
#lightbox-next:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-dim);
}

#lightbox-close {
  top: 20px;
  right: 20px;
  width: 36px;
  height: 36px;
  font-size: 18px;
}

#lightbox-prev,
#lightbox-next {
  position: absolute;
  bottom: 20px;
  width: 28px;
  height: 32px;
  font-size: 16px;
  background: rgba(8, 10, 12, 0.72);
  border-color: var(--line-bright);
  color: var(--text-primary);
  backdrop-filter: blur(6px);
}

#lightbox-prev { left: 20px; }
#lightbox-next { right: 20px; }

/* ─── Scrollbar ───────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--line-bright); }

/* ─── Mobile ──────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  #museum-header { padding: 40px 20px 36px; }
  .set-header { padding: 16px 20px 10px; }

  .set-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  #lightbox.is-open {
    flex-direction: column;
  }

  #lightbox-image-wrap {
    padding: 56px 16px 16px;
    flex: 0 0 55vh;
  }

  #lightbox-panel {
    width: 100%;
    border-left: none;
    border-top: 1px solid var(--line);
    transform: translateY(100%);
    transition: transform 380ms var(--ease-out), opacity 300ms ease;
    flex: 1;
    padding: 20px 20px 24px;
  }

  #lightbox.panel-ready #lightbox-panel {
    transform: translateY(0);
    opacity: 1;
  }

  :root {
    --panel-width: 0px;
  }
}

@media (max-width: 480px) {
  .set-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}