.container {
  display: grid;
  place-content: center;
}

ul {
  width: 560px;
  aspect-ratio: 1;
  list-style: none;
  padding: 0;
  margin: 0;
  position: relative;
  border-radius: 50%;
  display: flex;
  gap: 8px;
}

li {
  transition: 0.2s;
  position: absolute;
  left: 50%;
  top: 50%;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  /* 色相を15ずつ変化させる */
  background: oklch(80% 0.25 calc((sibling-index() - 1) * 15));
  transform: translate(-50%, -50%) rotate(calc((sibling-index() - 1) * 15deg))
    translateY(-240px);
}

@media (max-width: 640px) {
  ul {
    width: 320px;
  }

  li {
    width: 36px;
    height: 36px;
    transform: translate(-50%, -50%) rotate(calc((sibling-index() - 1) * 15deg))
      translateY(-140px);
  }
}