.ripple {
  position: relative;
  overflow: hidden;
  &::after {
    content: '';
    display: block;
    position: absolute;
    margin: 0;
    padding: 0;
    left: 50%;
    top: 50%;
    width: 120px;
    height: 120px;
    background-color: #f5f5f5;
    border-radius: 50%;
    opacity: .2;
    transform: translate(-50%, -50%) scale(0);
  }
  &:not(:active):after {
    animation: ripple-effect 1s ease-out;
  }
  &::after {
    visibility: hidden;
  }
  &:focus {
    &::after {
      visibility: visible;
    }
  }
  &-dark {
    &::after {
      background-color: #ddd;
    }
  }
}

button,
.button {
  outline: none;
  cursor: pointer;
}