html, body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: #0a0f1f;
  font-family: Georgia, serif;
}

canvas {
  display: block;
}

/* sliders */
input[type=range] {
  -webkit-appearance: none;
  height: 4px;
  background: #aa3333;
  border-radius: 2px;
  outline: none;
}

input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  background: white;
  border-radius: 50%;
  cursor: pointer;
}