body {
  margin: 0;
  overflow: hidden;
  font-family: sans-serif;
  background: #05051a;
  color: white;
}

/* Header stays on top, centered */
h1 {
  text-align: center;
  font-size: 2em;
  margin: 10px 0 20px 0;
  z-index: 10;
}

/* Controls below the header */
#controls {
  position: absolute;
  top: 60px; /* push below h1 */
  left: 10px;
  z-index: 10;
  background: rgba(0, 0, 0, 0.6);
  padding: 12px;
  border-radius: 12px;
  font-size: 1rem;
  max-width: 300px;
}

/* Sliders styling */
#controls input[type="range"] {
  width: 100%;
  margin: 4px 0 12px 0;
}
#extraControls {
  position: absolute;
  top: 60px;
  right: 10px;
  z-index: 10;
  background: rgba(0,0,0,0.6);
  padding: 12px;
  border-radius: 12px;
  font-size: 1rem;
  color: white;
}