body {
  margin: 0;
  background: #000;
  overflow: hidden;
  width: 100vw;
  height: 100vh;
  font-family: sans-serif;
  color: #fff;
}
canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  display: block;
}
#charcanvas {
  display: none;
}
#hudTop {
  position: fixed;
  left: 12px;
  bottom: 12px;
  right: auto;
  top: auto;
  z-index: 12;
  display: flex;
  gap: 8px;
}
#hudTop button {
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(0,0,0,0.6);
  color: #fff;
  cursor: pointer;
}
#hudTop button.active {
  background: rgba(62, 132, 255, 0.82);
  border-color: rgba(255,255,255,0.34);
}
#cameraHud {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 10;
  min-width: 128px;
  padding: 8px 10px;
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 8px;
  background: rgba(0,0,0,0.42);
  color: rgba(255,255,255,0.82);
  font: 11px/1.45 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: 0;
  pointer-events: none;
  text-shadow: 0 1px 2px rgba(0,0,0,0.65);
}
#fpsHud {
  position: fixed;
  top: 12px;
  right: 12px;
  z-index: 11;
  min-width: 108px;
  padding: 8px 10px;
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 8px;
  background: rgba(0,0,0,0.42);
  color: rgba(255,255,255,0.82);
  font: 11px/1.45 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: 0;
  pointer-events: none;
  text-shadow: 0 1px 2px rgba(0,0,0,0.65);
  text-align: right;
}
#clockHud {
  position: fixed;
  left: 12px;
  bottom: 52px;
  z-index: 10;
  min-width: 172px;
  padding: 8px 10px;
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 8px;
  background: rgba(0,0,0,0.42);
  color: rgba(255,255,255,0.82);
  font: 11px/1.45 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: 0;
  pointer-events: none;
  text-shadow: 0 1px 2px rgba(0,0,0,0.65);
}
#compareLabels {
  position: fixed;
  top: 58px;
  left: 0;
  right: 0;
  z-index: 9;
  display: grid;
  grid-template-columns: 1fr 1fr;
  pointer-events: none;
  color: rgba(255,255,255,0.76);
  font: 11px/1.3 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  text-shadow: 0 1px 2px rgba(0,0,0,0.7);
}
#compareLabels span {
  justify-self: center;
  padding: 4px 8px;
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 999px;
  background: rgba(0,0,0,0.34);
}
#settingsOverlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.72);
  z-index: 11;
}
.hidden {
  display: none !important;
}
#controls {
  position: fixed;
  z-index: 12;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(960px, calc(100vw - 32px));
  max-height: calc(100vh - 40px);
  overflow: auto;
  background: rgba(12,12,12,0.96);
  padding: 0;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.16);
  font-size: 12px;
  box-shadow: 0 22px 80px rgba(0,0,0,0.55);
}
.settingsHeader {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  background: rgba(12,12,12,0.98);
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.settingsHeader h2 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
}
.settingsHeader p {
  margin: 4px 0 0;
  color: rgba(255,255,255,0.58);
}
.settingsTabs {
  position: sticky;
  top: 65px;
  z-index: 1;
  display: flex;
  gap: 6px;
  padding: 10px 14px;
  background: rgba(12,12,12,0.98);
  border-bottom: 1px solid rgba(255,255,255,0.10);
  overflow-x: auto;
}
#controls .settingsTabs button {
  flex: 0 0 auto;
  min-width: 82px;
  padding: 7px 10px;
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.13);
  background: rgba(255,255,255,0.045);
  color: rgba(255,255,255,0.74);
}
#controls .settingsTabs button.active {
  background: rgba(62, 132, 255, 0.30);
  border-color: rgba(126, 174, 255, 0.62);
  color: #fff;
}
.settingsGrid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  padding: 14px;
}
#controls fieldset {
  min-width: 0;
  margin: 0;
  padding: 12px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.13);
  background: rgba(255,255,255,0.045);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
#controls fieldset.tabHidden {
  display: none;
}
#controls legend {
  padding: 0 6px;
  color: rgba(255,255,255,0.72);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0;
}
#controls label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  white-space: normal;
  color: rgba(255,255,255,0.88);
}
.hint {
  margin: -4px 0 0;
  color: rgba(255,255,255,0.52);
  font-size: 11px;
  line-height: 1.35;
}
.webgpuHidden {
  display: none !important;
}
#controls input[type="range"] {
  width: 100%;
  min-width: 0;
}
#controls input[type="text"] {
  min-width: 0;
  width: 100%;
  box-sizing: border-box;
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: 6px;
  background: rgba(0,0,0,0.28);
  color: rgba(255,255,255,0.9);
  padding: 7px 8px;
  outline: none;
}
#controls .inline {
  flex-direction: row;
  align-items: center;
  gap: 6px;
}
#rhiBackendStatus {
  color: rgba(255,255,255,0.65);
  min-width: 72px;
}
#physicsBackendStatus {
  color: rgba(255,255,255,0.72);
  min-width: 112px;
}
#physicsBackendStatus.active {
  color: #8ee9a4;
}
#terrainProviderStatus {
  color: rgba(255,255,255,0.72);
  min-width: 160px;
}
.terrainPreview {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.13);
  background: rgba(0,0,0,0.24);
}
#controls button {
  padding: 7px 12px;
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.06);
  color: #fff;
  cursor: pointer;
  font-size: 12px;
}
.rangeReadout {
  align-self: flex-end;
  color: rgba(255,255,255,0.62);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 11px;
}
#controls select {
  min-width: 88px;
  max-width: 100%;
}
@media (max-width: 820px) {
  .settingsGrid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 560px) {
  .settingsGrid {
    grid-template-columns: 1fr;
  }
}