body {
  background-color: #000;
}

#canvas {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  margin: 0;
  padding: 0;
}

.stopBtn {
  -webkit-appearance: none; /* iOSのデフォルトスタイルを無効化 */
  -webkit-text-size-adjust: 100%;
  position: fixed;
  text-align: center;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%);
  line-height: 1;
  text-decoration: none;
  color: #555555;
  font-size: 30px;
  border-radius: 50%;
  width: 200px;
  height: 200px;
  font-weight: bold;
  border: 2px solid #555555;
  transition: 0.3s;
  box-shadow: 0px 6px 0px -2px rgb(209, 67, 67);
  background-color: rgba(249, 144, 144, 0.8);
}

.startBtn {
  -webkit-appearance: none; /* iOSのデフォルトスタイルを無効化 */
  -webkit-text-size-adjust: 100%;
  position: fixed;
  bottom: 100px;
  text-align: center;
  left: 50%;
  transform: translateX(-50%);
  line-height: 1;
  text-decoration: none;
  color: #555555;
  font-size: 30px;
  border-radius: 50%;
  width: 200px;
  height: 200px;
  font-weight: bold;
  border: 2px solid #555555;
  transition: 0.3s;
  box-shadow: 0px 6px 0px -2px rgba(67, 145, 209, 1);
  background-color: #90caf9;
}

#result {
  position: fixed;
  width: 100%;
  top: 50%;
  text-align: center;
  /* left: 50%; */
  transform: translateY(-50%);
  font-size: 200px;

  color: #4410f0;
  text-shadow: 0px 0px 10px rgb(16, 16, 240);
  font-weight: bold;
}

#result_c {
  position: fixed;
  width: 100%;
  text-align: center;
  top: 50%;
  /* left: 50%; */
  transform: translateY(-200px);
  font-size: 50px;

  color: #ff6200;
  text-shadow: 0px 0px 10px rgb(240, 109, 16);
  font-weight: bold;
}

#result_o {
  position: fixed;
  width: 100%;
  text-align: center;
  top: 50%;
  /* left: 50%; */
  transform: translateY(-200px);
  font-size: 50px;

  color: #000000;
  text-shadow: 0px 0px 10px rgb(16, 16, 240);
  font-weight: bold;
}