html,
body,
#cesiumContainer {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #d9e0e2;
}

#cesiumContainer {
  opacity: 0;
  transition: opacity 180ms ease-out;
}

body.scene-ready #cesiumContainer {
  opacity: 1;
}

#controls,
#diagnostics,
#status {
  position: absolute;
  z-index: 1;
  border-radius: 4px;
  background: rgba(20, 24, 28, 0.82);
  color: #fff;
  font-size: 12px;
  line-height: 1.45;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
}

#loadingOverlay {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: grid;
  place-items: center;
  background: #d9e0e2;
  color: #1b2528;
  font-size: 13px;
  letter-spacing: 0;
  transition: opacity 220ms ease-out, visibility 220ms ease-out;
}

.loading-card {
  display: grid;
  grid-template-columns: 32px minmax(180px, 260px);
  gap: 12px;
  align-items: center;
  padding: 14px 16px;
  border: 1px solid rgba(70, 86, 90, 0.16);
  border-radius: 6px;
  background: rgba(244, 248, 248, 0.88);
  box-shadow: 0 12px 34px rgba(54, 68, 72, 0.20);
}

.loading-spinner {
  width: 28px;
  height: 28px;
  border: 3px solid rgba(42, 67, 72, 0.18);
  border-top-color: #147d8a;
  border-radius: 50%;
  animation: loading-spin 840ms linear infinite;
}

.loading-copy {
  display: grid;
  gap: 3px;
}

.loading-copy strong {
  font-size: 13px;
  font-weight: 650;
}

#loadingOverlay span {
  color: #526064;
}

.loading-bar {
  grid-column: 1 / -1;
  position: relative;
  height: 3px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(42, 67, 72, 0.12);
}

.loading-bar span {
  position: absolute;
  inset: 0 auto 0 0;
  width: 42%;
  border-radius: inherit;
  background: #147d8a;
  animation: loading-bar 1.2s ease-in-out infinite;
}

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

@keyframes loading-bar {
  0% {
    transform: translateX(-110%);
  }
  55% {
    transform: translateX(70%);
  }
  100% {
    transform: translateX(250%);
  }
}

body.scene-ready #loadingOverlay {
  visibility: hidden;
  opacity: 0;
}

body.scene-error #loadingOverlay {
  color: #5b1414;
}

body.scene-error .loading-spinner {
  border-color: rgba(120, 30, 30, 0.18);
  border-top-color: #9f2f2f;
  animation-play-state: paused;
}

body.scene-error .loading-bar span {
  background: #9f2f2f;
  animation-play-state: paused;
}

#controls {
  top: 12px;
  left: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 8px;
}

#status {
  left: 12px;
  bottom: 12px;
  max-width: 560px;
  padding: 8px 10px;
}

#diagnostics {
  right: 12px;
  top: 12px;
  min-width: 280px;
  max-width: 360px;
  padding: 10px 12px;
  white-space: pre-line;
}

#controls button,
#controls select {
  height: 28px;
  border: 0;
  border-radius: 4px;
}

#controls button {
  padding: 0 10px;
  background: #f2f5f7;
  color: #111;
  cursor: pointer;
}

#controls button:active:not(:disabled) {
  transform: translateY(1px);
}

#controls :disabled {
  opacity: 0.45;
  cursor: default;
}

#controls label:has(:disabled) {
  opacity: 0.45;
}

#controls input[type="range"] {
  width: 120px;
}

#controls label {
  display: inline-flex;
  gap: 5px;
  align-items: center;
  white-space: nowrap;
}

/* Playback / layers / camera each read as their own row of the panel. */
.control-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  align-items: center;
}

.control-group + .control-group {
  padding-top: 6px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

/* Per-asset checkboxes hang off the master "Scene" toggle. */
.control-subgroup {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  align-items: center;
  padding-left: 10px;
  border-left: 1px solid rgba(255, 255, 255, 0.16);
}

.control-subgroup:empty {
  display: none;
}

.hidden {
  display: none;
}