#demo {
  padding: 10px;
  background: var(--surface);
}

canvas {
  width: 100%;
}

.sourcecode {
  display: flex;
  gap: 1rem;
}

.sourcecode a {
  gap: 0.25rem;
  display: flex;
  align-items: center;
  text-decoration: none;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
  margin-top: 1rem;
  padding: 1rem;
  background: var(--surface);
}

.controls label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.controls input[type="checkbox"] {
  width: 1rem;
  height: 1rem;
  accent-color: var(--accent);
}

.controls input[type="range"] {
  width: 10rem;
  accent-color: var(--accent);
}

.controls #animation-speed {
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  accent-color: #666;
}

.controls #animation-speed::-webkit-slider-runnable-track {
  /* height: 0.5rem; */
  border-radius: 1rem;
  background: linear-gradient(
    90deg,
    var(--accent-red) 0% 29%,
    var(--accent-mid) 29% 30%,
    var(--accent) 30% 100%
  );
}

.controls #animation-speed::-moz-range-track {
  height: 0.5rem;
  border-radius: 1rem;
  background: linear-gradient(
    90deg,
    var(--accent-red) 0% 29%,
    var(--accent-mid) 29% 30%,
    var(--accent) 30% 100%
  );
}

.controls select {
  padding: 0.35rem 0.5rem;
  border: 1px solid var(--accent);
  border-radius: 4px;
  background: var(--surface);
  color: var(--accent);
}

.controls input:focus,
.controls select:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

#controls-BVH {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

#controls-BVH input[type="range"] {
  width: 6rem;
}

.canvas-wrapper {
  position: relative;
}

#loader-wrapper {
  position: absolute;
  width: 100%;
  height: 100%;
  display: none;
}

#loader-wrapper.show {
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: rgba(0, 0, 0, 0.5);
}

.spinner {
  border: 16px solid var(--surface);
  border-top: 16px solid var(--accent);
  border-radius: 50%;
  padding: 10%;
  animation: spin 2s linear infinite;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}