html, body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  width: 100%;
  height: 100%;
  background-color: #0f0f14;
}

canvas {
  display: block;
}

.overlay {
  display: flex;
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: max-content;
  max-width: 95%;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: rgba(20, 20, 28, 0.85);
  backdrop-filter: blur(8px);
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  z-index: 10;
}

.overlay button, 
.overlay select {
  background-color: #272738;
  color: #f1f1f5;
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 12px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
}

.overlay button:hover, 
.overlay select:hover {
  background-color: #383850;
  border-color: rgba(255, 255, 255, 0.3);
}

.overlay input[type=range] {
  accent-color: #670cdd;
  cursor: pointer;
  height: 14px;
}