*{
  box-sizing:border-box;
  margin:0;
  padding:0;
}
body {
  height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  background-color: #212121;
  font-family:arial;
}
.radio-input {
  display: flex;
  align-items: center;
  justify-content: center;
}

.radio-input input {
  appearance: none;
  width: 2em;
  height: 2em;
  background-color: #171717;
  box-shadow: inset 2px 5px 10px rgb(5, 5, 5);
  border-radius: 5px;
  transition: .4s ease-in-out;
}

.radio-input input:hover {
  scale: 1.2;
  cursor: pointer;
  box-shadow: none;
}

.radio-input .plus1 {
  position: relative;
  top: 0.01em;
  left: -1.45em;
  width: 1.3em;
  height: 0.2em;
  background-color: red;
  rotate: 45deg;
  scale: 0;
  border-radius: 5px;
  transition: .4s ease-in-out;
}

.radio-input .plus2 {
  position: relative;
  width: 1.3em;
  height: 0.2em;
  background-color: red;
  transform: rotate(90deg);
  border-radius: 5px;
  transition: .4s ease-in-out;
}

.radio-input input:checked {
  box-shadow: none;
}

.radio-input input:checked + .plus1 {
  transform: rotate(180deg);
  scale: 1;
}