:root {
  color-scheme: dark;
  font-family: "Inter", "Segoe UI", system-ui, sans-serif;
}

body {
  margin: 0;
  background: #ffffff;
  color: #e5ecff;
  overflow: hidden;
}

#gpuCanvas {
  width: 100vw;
  height: 100vh;
  display: block;
}

.hud {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 10;
  padding: 12px 14px;
  background: rgba(6, 10, 18, 0.7);
  border: 1px solid rgba(80, 110, 180, 0.4);
  border-radius: 10px;
  backdrop-filter: blur(6px);
  max-width: 320px;
}

.title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.subtitle {
  font-size: 12px;
  color: #9fb0d1;
}

.controls {
  margin-top: 10px;
  display: grid;
  gap: 6px;
}

.control-row {
  display: grid;
  grid-template-columns: 64px 1fr 56px;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: #c6d2ef;
}

.control-row select,
.control-row input[type="range"] {
  width: 100%;
}

.control-row select {
  grid-column: 2 / span 2;
  background: rgba(15, 22, 36, 0.9);
  color: #e5ecff;
  border: 1px solid rgba(90, 120, 190, 0.5);
  border-radius: 6px;
  padding: 4px 6px;
  font-size: 11px;
}

.control-row .value {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.status {
  margin-top: 8px;
  font-size: 12px;
  color: #b9c7ea;
  white-space: pre-line;
}

.hint {
  margin-top: 6px;
  font-size: 11px;
  color: #7f8db1;
}