style.css

* {
  margin: 0px;
  padding: 0px;
  box-sizing: border-box;
}
body {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
  min-height: 100vh;
  background: #222;
  overflow: hidden;
}
:root {
  --clr1: lightblue;
  --clr2: rgb(243, 80, 21);
}
label {
  position: relative;
  width: 150px;
  height: 150px;
  margin: 4px;
}
label input {
  appearance: none;
}
label .face {
  position: absolute;
  inset: 0;
  background: #333;
  cursor: pointer;
  border-radius: 50%;
  mix-blend-mode: lighten;
  transition: 0.5s;
}
label input:checked ~ .face{
  background: var(--clr1);
  z-index: 100;
  filter: 
  drop-shadow(0 0 4px  var(--clr1))
  drop-shadow(0 0 16px var(--clr1))
  /* drop-shadow(0 0 250px var(--clr1)); */
}
label:nth-child(even) input:checked ~ .face{
  background: var(--clr2);
  filter: 
  drop-shadow(0 0 4px var(--clr2))
  drop-shadow(0 0 16px var(--clr2))
  /* drop-shadow(0 0 250px var(--clr2)); */
}
label .face::before {
  content: '';
  position: absolute;
  top: 60px;
  left: 45px;
  width: 15px;
  height: 15px;
  background: #111;
  opacity: 0.5;
  border-radius: 50%;
  box-shadow: 45px 0 0 #111;
}
label .face::after {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: 45px;
  width: 40px;
  height: 8px;
  background: #111;
  opacity: 0.5;
  border-radius: 8px;
  transition: 0.5s;
}
label input:checked ~ .face::after{
  width: 40px;
  height: 20px;
  border-radius: 0;
  border-bottom-right-radius: 18px;
  border-bottom-left-radius: 18px;
  transform: translateX(-50%) translateY(10px);
}