:root {
  color-scheme: dark;
  --museum-bg: #07111f;
  --museum-panel: rgba(9, 18, 34, 0.84);
  --museum-panel-strong: rgba(10, 22, 40, 0.96);
  --museum-stroke: rgba(148, 163, 184, 0.18);
  --museum-text: #e5eefc;
  --museum-muted: #9fb2cd;
  --museum-accent: #60a5fa;
  --museum-accent-2: #38bdf8;
  --museum-warm: #f59e0b;
  --museum-card: rgba(15, 28, 48, 0.88);
  --museum-shadow: 0 24px 48px rgba(0, 0, 0, 0.28);
  --museum-radius: 22px;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top, rgba(56, 189, 248, 0.14), transparent 30%),
    linear-gradient(180deg, #0a1628 0%, #07111f 100%);
  color: var(--museum-text);
}

body {
  overflow: hidden;
}

a {
  color: inherit;
}

.museum-shell {
  min-height: 100vh;
  padding: 1rem;
}

.museum-topbar {
  display: flex;
  justify-content: space-between;
  gap: 1.25rem;
  align-items: flex-start;
  padding: 1.2rem 1.35rem;
  border: 1px solid var(--museum-stroke);
  border-radius: var(--museum-radius);
  background: linear-gradient(180deg, rgba(15, 30, 54, 0.88), rgba(8, 18, 35, 0.96));
  box-shadow: var(--museum-shadow);
}

.museum-kicker,
.museum-detail-kicker {
  margin: 0 0 0.35rem;
  color: var(--museum-accent-2);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  font-weight: 800;
}

.museum-topbar h1,
.museum-panel h2,
.museum-details h2 {
  margin: 0;
  font-size: clamp(1.35rem, 2vw, 2rem);
}

.museum-subtitle {
  max-width: 64ch;
  margin: 0.55rem 0 0;
  color: var(--museum-muted);
  line-height: 1.6;
}

.museum-actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
}

.museum-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--museum-stroke);
  text-decoration: none;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.museum-button:hover {
  transform: translateY(-1px);
}

.museum-button-primary {
  background: linear-gradient(135deg, var(--museum-accent), var(--museum-accent-2));
  color: #04111e;
}

.museum-button-secondary {
  background: rgba(96, 165, 250, 0.1);
  color: var(--museum-text);
}

.museum-layout {
  display: grid;
  grid-template-columns: minmax(270px, 330px) minmax(0, 1fr) minmax(280px, 340px);
  gap: 1rem;
  margin-top: 1rem;
  height: calc(100vh - 168px);
}

.museum-sidebar,
.museum-details,
.museum-stage {
  min-height: 0;
}

.museum-panel,
.museum-stage-frame {
  height: 100%;
  border-radius: var(--museum-radius);
  border: 1px solid var(--museum-stroke);
  background: var(--museum-panel);
  box-shadow: var(--museum-shadow);
  backdrop-filter: blur(18px);
}

.museum-panel {
  padding: 1.1rem;
  overflow: auto;
}

.museum-controls {
  display: grid;
  gap: 0.55rem;
}

.museum-label {
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--museum-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.museum-input,
.museum-select {
  width: 100%;
  min-height: 42px;
  padding: 0.78rem 0.9rem;
  border-radius: 14px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  background: rgba(4, 11, 24, 0.78);
  color: var(--museum-text);
  font: inherit;
}

.museum-input:focus,
.museum-select:focus,
.museum-chip:focus-visible,
.museum-card:focus-visible,
.museum-text-toggle:focus-visible {
  outline: 2px solid var(--museum-accent);
  outline-offset: 2px;
}

.museum-filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1rem;
}

.museum-chip {
  padding: 0.55rem 0.8rem;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  background: rgba(10, 20, 38, 0.78);
  color: var(--museum-text);
  font: inherit;
  cursor: pointer;
}

.museum-chip.active {
  background: linear-gradient(135deg, rgba(96, 165, 250, 0.22), rgba(56, 189, 248, 0.22));
  border-color: rgba(96, 165, 250, 0.42);
  color: #ffffff;
}

.museum-stats {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin: 1rem 0 0.85rem;
  font-size: 0.84rem;
  color: var(--museum-muted);
}

.museum-card-list {
  display: grid;
  gap: 0.7rem;
}

.museum-card {
  width: 100%;
  text-align: left;
  padding: 0.95rem;
  border: 1px solid rgba(148, 163, 184, 0.15);
  border-radius: 18px;
  background: var(--museum-card);
  color: var(--museum-text);
  cursor: pointer;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.museum-card:hover {
  transform: translateY(-1px);
  border-color: rgba(96, 165, 250, 0.45);
}

.museum-card.active {
  border-color: rgba(96, 165, 250, 0.48);
  background: linear-gradient(180deg, rgba(12, 28, 49, 0.98), rgba(13, 34, 60, 0.96));
}

.museum-card-title-row,
.museum-card-meta-row {
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
  align-items: flex-start;
}

.museum-card h3 {
  margin: 0;
  font-size: 1rem;
}

.museum-card-student,
.museum-card-date,
.museum-card-description {
  margin: 0.3rem 0 0;
  color: var(--museum-muted);
  line-height: 1.45;
  font-size: 0.88rem;
}

.museum-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.28rem 0.52rem;
  border-radius: 999px;
  background: rgba(96, 165, 250, 0.14);
  color: #cfe7ff;
  font-size: 0.74rem;
  font-weight: 700;
  white-space: nowrap;
}

.museum-empty-list {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: 18px;
  background: rgba(10, 20, 38, 0.72);
  color: var(--museum-muted);
}

.museum-stage-frame {
  position: relative;
  overflow: hidden;
  min-height: 0;
}

a-scene {
  display: block;
  width: 100%;
  height: 100%;
}

.museum-overlay {
  position: absolute;
  z-index: 3;
  border: 1px solid rgba(148, 163, 184, 0.16);
  background: rgba(7, 17, 31, 0.74);
  backdrop-filter: blur(12px);
  box-shadow: var(--museum-shadow);
}

.museum-help {
  top: 1rem;
  left: 1rem;
  max-width: 300px;
  padding: 0.9rem 1rem;
  border-radius: 18px;
}

.museum-help h2 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
}

.museum-help p {
  margin: 0.4rem 0;
  color: var(--museum-muted);
  line-height: 1.5;
  font-size: 0.88rem;
}

.museum-banner {
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.65rem 0.95rem;
  border-radius: 999px;
  color: #f8fbff;
  font-size: 0.85rem;
  font-weight: 700;
}

.museum-loading,
.museum-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 2rem;
  z-index: 4;
  background: rgba(5, 11, 22, 0.72);
}

.museum-empty[hidden],
.museum-loading[hidden] {
  display: none;
}

.museum-spinner {
  width: 52px;
  height: 52px;
  margin: 0 auto 1rem;
  border: 4px solid rgba(255, 255, 255, 0.16);
  border-top-color: var(--museum-accent-2);
  border-radius: 999px;
  animation: museum-spin 1s linear infinite;
}

@keyframes museum-spin {
  to {
    transform: rotate(360deg);
  }
}

.museum-detail-meta,
.museum-detail-date,
.museum-detail-description {
  color: var(--museum-muted);
  line-height: 1.6;
}

.museum-detail-description {
  margin-top: 1rem;
}

.museum-text-toggle {
  margin-top: 0.6rem;
  padding: 0;
  border: none;
  background: none;
  color: var(--museum-accent-2);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.museum-meta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
  margin: 1rem 0 0;
}

.museum-meta-grid dt {
  margin: 0 0 0.18rem;
  color: var(--museum-muted);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 800;
}

.museum-meta-grid dd {
  margin: 0;
  line-height: 1.45;
}

.museum-link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1rem;
}

.museum-inline-link {
  color: #d5ecff;
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

kbd {
  display: inline-block;
  padding: 0.14rem 0.4rem;
  border-radius: 8px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  background: rgba(148, 163, 184, 0.1);
  font-size: 0.8rem;
}

@media (max-width: 1180px) {
  body {
    overflow: auto;
  }

  .museum-layout {
    grid-template-columns: 1fr;
    height: auto;
  }

  .museum-sidebar,
  .museum-details {
    order: 2;
  }

  .museum-stage {
    order: 1;
  }

  .museum-stage-frame {
    height: min(72vh, 680px);
  }
}

@media (max-width: 720px) {
  .museum-shell {
    padding: 0.65rem;
  }

  .museum-topbar {
    padding: 1rem;
  }

  .museum-topbar,
  .museum-actions,
  .museum-stats,
  .museum-meta-grid {
    display: grid;
  }

  .museum-actions {
    grid-template-columns: 1fr;
  }

  .museum-meta-grid {
    grid-template-columns: 1fr;
  }

  .museum-help {
    left: 0.7rem;
    right: 0.7rem;
    max-width: none;
  }

  .museum-banner {
    left: 0.7rem;
    right: 0.7rem;
    bottom: 0.7rem;
    transform: none;
    border-radius: 18px;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}