 touch-action: manipulation;
  transform: translateZ(0);
  transition: filter .2s;
  user-select: none;
  -webkit-user-select: none;
  vertical-align: middle;
  white-space: nowrap;
}

button:after {
  background-clip: padding-box;
  box-shadow: inset 4px 4px 4px rgba(15, 15, 15, 0.315),
    4px 4px 4px rgba(28, 28, 28, 0.13);
  border: none;
  border-radius: 16px;
  outline: none;
  bottom: -4px;
  content: "";
  left: 0;
  position: absolute;
  right: 0;
  top: 0;
  z-index: -1;
}

button:main, button:foc