html, body {
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: #000;
  font-family: system-ui, sans-serif;
}

#app {
  position: fixed;
  inset: 0;
}

.controls-ui {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  background: rgba(0, 0, 0, 0.4);
  padding: 10px 20px;
  border-radius: 6px;
  backdrop-filter: blur(8px);
  z-index: 1000;
}

.controls-ui button,
.controls-ui input[type="range"] {
  cursor: pointer;
}