body {
  text-align: center;
  background-color: #222;
  color: white;
  font-family: Arial, Helvetica, sans-serif;
}

.wheel-container {
  position: relative;
  width: 400px;
  height: 400px;
  margin: 20px auto;
}

.arrow {
  position: absolute;
  top: -10px;
  left: 50%;
  width: 30px;
  height: 30px;
  background-color: red;
  clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
  transform: translateX(-50%) rotate(180deg);
}

canvas {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 5px solid white;
}

button {
  padding: 10px 20px;
  font-size: 18px;
  cursor: pointer;
  margin-top: 10px;
}

#result {
  font-size: 20px;
  margin-top: 10px;
}