.container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.container label {
  cursor: pointer;
  position: relative;
  width: 80px;
  height: 80px;
  display: flex;
  justify-content: center;
  align-items: center;
}
label input {
  appearance: none;
}
label span {
  width: 100%;
  height: 100%;
  position: absolute;
  background: linear-gradient(#fff, #ebf5fc, #ebf5fc);
  border-radius: 6px;
  box-shadow: inset 0 5px 1px 0 rgba(0, 0, 0, 0.1),
    0 5px 15px rgba(0, 0, 0, 0.1), 0 -5px 15px rgba(0, 0, 0, 0.15);
}
.container label span::before {
  content: "";
  position: absolute;
  border-top: 1px solid #fff;
  inset: 5px 3px;
  filter: blur(5px);
}
.container label input:checked ~ span {
  box-shadow: inset 0 -5px 0 0 rgba(0, 0, 0, 0.2),
    0 2px 10px rgba(0, 0, 0, 0.75);
  background: linear-gradient(#2b6b73, #31727a, #2b6b73);
}
label p {
  position: relative;
  z-index: 10;
  font-size: 3rem;
  color: #6d8e90;
}
.container label input:checked ~ p {
  color: #fff;
  filter: drop-shadow(0 0 5px #00ffe2) drop-shadow(0 0 8px #00ffe2)
    drop-shadow(0 0 12px #00ffe2) drop-shadow(0 0 16px #00ffe2);
}