/* <reset-style> ============================ */
button {
  border: none;
  background: none;
  padding: 0;
  margin: 0;
  cursor: pointer;
  font-family: inherit;
}

/* <main-style> ============================ */
.theme__icon {
  width: 32px;
  height: 32px;
  padding: 4px;
  overflow: hidden;
  position: relative;
}

.theme__icon > :nth-child(1) {
  width: 14px;
  height: 14px;
  border-radius: 24px;
  border: 1px solid #212121;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: rgb(255, 204, 0);
  transition: width .4s, height .4s, border .4s, background-color .4s;
  z-index: 10;
}

.theme__icon:hover > :nth-child(1) {
  width: 24px;
  height: 24px;
  border: 1px solid rgb(245, 245, 247);
  background-color: rgb(245, 245, 247);
}

.theme__icon > :nth-child(2) {
  width: 24px;
  height: 24px;
  border-radius: 24px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: transform .4s;
}

.theme__icon:hover > :nth-child(2) {
  transform: translate(-50%, -50%) rotate(-45deg) scale(.8);
}

.theme__icon > :nth-child(2) > :nth-child(1) {
  display: block;
  width: 2px;
  height: 24px;
  border-radius: 2px;
  position: relative;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  background-color: rgb(255, 204, 0);
}

.theme__icon > :nth-child(2) > :nth-child(2) {
  display: block;
  width: 24px;
  height: 2px;
  border-radius: 2px;
  position: relative;
  top: -54%;
  left: 50%;
  transform: translateX(-50%);
  background-color: rgb(255, 204, 0);
}

.theme__icon > :nth-child(2) > :nth-child(3) {
  display: block;
  width: 24px;
  height: 2px;
  border-radius: 2px;
  position: relative;
  top: -60%;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  background-color: rgb(255, 204, 0);
}

.theme__icon > :nth-child(2) > :nth-child(4) {
  display: block;
  width: 24px;
  height: 2px;
  border-radius: 2px;
  position: relative;
  top: -70%;
  left: 50%;
  transform: translateX(-50%) rotate(-45deg);
  background-color: rgb(255, 204, 0);
}

.theme__icon > :nth-child(3) {
  width: 20px;
  height: 20px;
  border-radius: 24px;
  position: absolute;
  top: 50%;
  left: 100%;
  transform: translateY(-50%);
  background-color: #212121;
  transition: top .4s, left .4s;
  transition-delay: .2s;
  z-index: 20;
}

.theme__icon:hover > :nth-child(3) {
  top: 35%;
  left: 40%;
}