:root {
  --size-btn: 96px;
  --size-prediction: 96px;
}
button span{
  font-size:18px;
  font-weight:bold;
  color:#fff;
}
.background{
    background: url('/resource/images/sky-1.png');
}
.prediction__box {
  margin:-16px 8px;
  width: var(--size-btn);
  height: var(--size-btn);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.prediction__btn, .prediction__stars {
  position: absolute;
  top: calc((var(--size-btn) - var(--size-prediction)) / 2);
  left: calc((var(--size-btn) - var(--size-prediction)) / 2);
  width: var(--size-prediction);
  height: var(--size-prediction);
  border-radius: 50%;
}
.prediction__btn {
  z-index: 2;
  background-size: cover;
  cursor: pointer;
  border: none;
  outline: none;
  transition: opacity 0.6s;
  opacity: 0.8;
}
.prediction__btn:hover {
  opacity: 1;
}
.prediction__btn.inactive {
  opacity: 0;
  pointer-events: none;
}
.prediction__border {
  width: 100%;
  height: 100%;
  position: absolute;
}
.prediction__stars {
  z-index: 3;
  opacity: 0.8;
  pointer-events: none;
  transform-origin: 50% 50%;
}
.prediction__stars circle {
  fill: #fff;
}
.prediction__stars.rotate {
  animation: rotate 1s infinite linear;
}

.show {
  opacity: 1;
}

@keyframes rotate {
  to {
    transform: rotate(360deg);
  }
}