/* Scene Explorer */

:root {
  --ex-bg: #f4f6f9;
  --ex-card: #ffffff;
  --ex-ink: #1d2433;
  --ex-muted: #5d6677;
  --ex-faint: #dfe3ea;
  --ex-accent: #2f6fd6;
  --ex-gt: #ffc61a;
  --ex-pred: #ff4d5e;
  --ex-dark: #0d0f12;
}

.explorer-section {
  background: var(--ex-bg);
  padding: 3.5rem 1rem 3rem;
}

.explorer-section .title.is-3 {
  margin-bottom: 0.5rem;
}

.explorer-intro {
  color: var(--ex-muted);
  max-width: 52rem;
  margin: 0 auto 1.75rem;
}

#explorer-app {
  max-width: 1280px;
  margin: 0 auto;
  outline: none;
}

/* toolbar ----------------------------------------------------------------- */

.ex-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  align-items: center;
  margin-bottom: 0.75rem;
}

.ex-group {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  align-items: center;
}

.ex-group-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ex-muted);
  margin-right: 0.2rem;
}

.ex-chip {
  font: inherit;
  font-size: 0.85rem;
  border: 1px solid var(--ex-faint);
  background: var(--ex-card);
  color: var(--ex-ink);
  border-radius: 999px;
  padding: 0.25rem 0.8rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.ex-chip:hover {
  border-color: #b9c1cf;
}

.ex-chip.is-active {
  background: var(--ex-ink);
  border-color: var(--ex-ink);
  color: #fff;
}

.ex-chip:focus-visible,
.ex-thumb:focus-visible,
.ex-tab:focus-visible {
  outline: 2px solid var(--ex-accent);
  outline-offset: 2px;
}

/* thumbnail strip ----------------------------------------------------------- */

.ex-strip-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.ex-step {
  flex: none;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  border: 1px solid var(--ex-faint);
  background: var(--ex-card);
  color: var(--ex-ink);
  cursor: pointer;
  font-size: 1rem;
}

.ex-step:hover {
  border-color: #b9c1cf;
}

#ex-strip {
  display: flex;
  gap: 0.6rem;
  overflow-x: auto;
  padding: 0.25rem 0.1rem 0.6rem;
  scroll-snap-type: x proximity;
  flex: 1;
}

.ex-thumb {
  flex: none;
  width: 104px;
  padding: 0;
  border: 2px solid transparent;
  border-radius: 10px;
  overflow: hidden;
  background: var(--ex-card);
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(20, 30, 50, 0.12);
  scroll-snap-align: start;
  transition: transform 0.15s, border-color 0.15s;
}

.ex-thumb:hover {
  transform: translateY(-2px);
}

.ex-thumb.is-active {
  border-color: var(--ex-gt);
}

.ex-thumb img {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
}

.ex-thumb-label {
  display: flex;
  justify-content: space-between;
  gap: 0.25rem;
  font-size: 0.68rem;
  padding: 0.25rem 0.35rem;
  color: var(--ex-muted);
}

.ex-tag {
  font-weight: 600;
  text-transform: capitalize;
}

.ex-winter { color: #3b7bbf; }
.ex-spring { color: #3c9a4f; }
.ex-summer { color: #c58b00; }
.ex-autumn { color: #c2562c; }

/* main grid ------------------------------------------------------------------ */

.ex-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr);
  gap: 1.25rem;
  align-items: start;
}

.ex-card {
  background: var(--ex-card);
  border-radius: 14px;
  box-shadow: 0 1px 3px rgba(20, 30, 50, 0.08), 0 8px 24px rgba(20, 30, 50, 0.06);
  overflow: hidden;
}

.ex-aerial-wrap {
  position: relative;
  background: var(--ex-dark);
}

#ex-aerial {
  display: block;
  width: 100%;
  aspect-ratio: 1;
}

.ex-aerial-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.75rem 0.9rem;
  border-top: 1px solid var(--ex-faint);
}

.ex-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  padding: 0 0.9rem 0.85rem;
  font-size: 0.8rem;
  color: var(--ex-muted);
}

.ex-legend span::before {
  content: "";
  display: inline-block;
  width: 0.7rem;
  height: 0.7rem;
  margin-right: 0.35rem;
  vertical-align: -0.05rem;
  border-radius: 50%;
}

.ex-legend .lg-gt::before { background: var(--ex-gt); border: 1px solid #222; }
.ex-legend .lg-pred::before { background: transparent; border: 2px solid var(--ex-pred); }
.ex-legend .lg-post::before { background: linear-gradient(90deg, #51127c, #fc8961, #fcfdbf); border-radius: 3px; }
.ex-legend .lg-lidar::before { background: linear-gradient(90deg, #30123b, #1ae4b6, #faba39, #7a0403); border-radius: 3px; }

.ex-setting-note {
  font-size: 0.82rem;
  color: var(--ex-muted);
  padding: 0 0.9rem 0.9rem;
  margin: 0;
}

/* right column --------------------------------------------------------------- */

.ex-right {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.ex-tabs {
  display: flex;
  border-bottom: 1px solid var(--ex-faint);
}

.ex-tab {
  font: inherit;
  font-size: 0.9rem;
  flex: 1;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 0.7rem 0.5rem 0.6rem;
  color: var(--ex-muted);
  cursor: pointer;
}

.ex-tab.is-active {
  color: var(--ex-ink);
  border-bottom-color: var(--ex-ink);
  font-weight: 600;
}

.ex-cams {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  background: var(--ex-dark);
}

.ex-cam {
  position: relative;
  margin: 0;
}

.ex-cam img {
  display: block;
  width: 100%;
  aspect-ratio: 2448 / 1000;
  object-fit: cover;
  cursor: zoom-in;
  background: #1a1d22;
}

.ex-cam figcaption {
  position: absolute;
  left: 0.4rem;
  top: 0.35rem;
  font-size: 0.72rem;
  color: #fff;
  background: rgba(13, 15, 18, 0.6);
  border-radius: 4px;
  padding: 0.05rem 0.4rem;
  text-transform: capitalize;
}

#ex-lidar3d,
#ex-map {
  width: 100%;
  aspect-ratio: 16 / 10;
  background: var(--ex-dark);
}

#ex-lidar3d canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
  cursor: grab;
}

.ex-pane-note {
  font-size: 0.78rem;
  color: var(--ex-muted);
  padding: 0.5rem 0.8rem;
  margin: 0;
}

.ex-map-legend span::before {
  content: "";
  display: inline-block;
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  margin: 0 0.3rem 0 0.6rem;
}

.ex-map-legend .m-train::before { background: #7c93b8; }
.ex-map-legend .m-dev::before { background: #e3a33b; }
.ex-map-legend .m-test::before { background: #d9534f; }
.ex-map-legend .m-shown::before { background: #1d2433; border: 2px solid #fff; box-shadow: 0 0 0 1px #1d2433; }

/* info card ------------------------------------------------------------------ */

.ex-info {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 190px;
  gap: 0.5rem 1rem;
  padding: 1rem 1.1rem;
  align-items: center;
}

.ex-facts {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.3rem 0.9rem;
  margin: 0;
  font-size: 0.88rem;
}

.ex-facts dt {
  color: var(--ex-muted);
}

.ex-facts dd {
  margin: 0;
  color: var(--ex-ink);
  font-variant-numeric: tabular-nums;
}

.ex-facts dd.cap {
  text-transform: capitalize;
}

.ex-errors {
  display: flex;
  gap: 1.5rem;
  grid-column: 1 / -1;
  border-top: 1px solid var(--ex-faint);
  padding-top: 0.75rem;
  margin-top: 0.25rem;
}

.ex-err-value {
  font-family: 'Google Sans', sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--ex-ink);
  line-height: 1.1;
}

.ex-err-label {
  font-size: 0.78rem;
  color: var(--ex-muted);
}

.ex-heading-wrap {
  text-align: center;
}

#ex-heading {
  width: 100%;
  aspect-ratio: 1;
  display: block;
}

.ex-heading-caption {
  font-size: 0.72rem;
  color: var(--ex-muted);
  margin-top: 0.2rem;
}

.ex-id {
  grid-column: 1 / -1;
  font-size: 0.72rem;
  color: #9aa2b1;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.ex-attribution {
  max-width: 1280px;
  margin: 1rem auto 0;
  font-size: 0.75rem;
  color: var(--ex-muted);
  text-align: center;
}

/* states ---------------------------------------------------------------------- */

#explorer-app.is-loading #ex-aerial {
  opacity: 0.6;
  transition: opacity 0.2s;
}

.ex-error {
  display: none;
  padding: 2rem;
  text-align: center;
  color: var(--ex-muted);
}

#explorer-app.has-error .ex-error {
  display: block;
}

#explorer-app.has-error .ex-body {
  display: none;
}

#ex-lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(8, 10, 14, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  cursor: zoom-out;
}

#ex-lightbox[hidden] {
  display: none;
}

#ex-lightbox img {
  max-width: 100%;
  max-height: 100%;
  border-radius: 6px;
}

/* responsive ------------------------------------------------------------------ */

@media (max-width: 960px) {
  .ex-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 520px) {
  .ex-info {
    grid-template-columns: minmax(0, 1fr);
  }
  .ex-heading-wrap {
    max-width: 220px;
    margin: 0 auto;
  }
  .ex-cams {
    grid-template-columns: 1fr;
  }
  .explorer-section {
    padding: 2.5rem 0.75rem 2rem;
  }
}