<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Document</title>
  <style>
body {
  display: grid;
  grid-auto-flow: column;
  grid-gap: 8vw;
  place-content: center;
  margin: 0;
  height: 100vh;
  background: #ecf0f4;
}
button {
  --i: var(--light, 0);
  --not-i: calc(1 - var(--i));
  --j: var(--press, 0);
  --not-j: calc(1 - var(--j));
  z-index: var(--i);
  border: none;
  width: 2em;
  height: 2em;
  border-radius: 15%;
  transform: scale(calc(1 - var(--j)*.02));
  box-shadow: calc(var(--not-j)*-0.25em) calc(var(--not-j)*-0.25em) 0.25em rgba(252, 252, 252, var(--not-j)), calc(var(--not-j)*0.25em) calc(var(--not-j)*0.25em) 0.25em rgba(210, 218, 230, var(--not-j)), inset calc(var(--j)*0.25em) calc(var(--j)*0.25em) 0.25em rgba(210, 218, 230, var(--j)), inset calc(var(--j)*-0.25em) calc(var(--j)*-0.25em) 0.25em rgba(252, 252, 252, var(--j));
  background: #e8e8e8;
  font-size: 2.5em;
  transition: box-shadow 0.3s, transform 0.3s cubic-bezier(0.2, 4, 1, 3);
  cursor: pointer;
}
button::after {
  filter: Contrast(0) Sepia(var(--i)) Hue-Rotate(calc(var(--hue) - 50deg)) Saturate(5) Opacity(calc(var(--i) + .21*var(--not-i))) Drop-Shadow(1px 1px hsla(0, 0%, 100%, var(--not-i)));
  transition: filter 0.3s;
  content: attr(data-ico);
}
button:focus {
  outline: none;
}
button:hover, button:focus {
  --light: 1 ;
}
button:active {
  --press: 1 ;
}
</style>
</head>
<body>

  <button aria-label="heart" data-ico="????" style="--hue: 344deg"></button>
<button aria-label="like" data-ico="????" style="--hue: 247deg"></button>
<button aria-label="star" data-ico="⭐" style="--hue: 48deg"></button>

</body>
</html>