.container.cool-btn-container button:not(:last-child) {
  margin-bottom: 15px;
}

[anim="ripple"] {
  position: relative;
  overflow: hidden;
}

[anim="ripple"]:before {
  content: '';
  position: absolute;
  display: block;
  background: var(--ripple-background, white);
  border-radius: 50%;
  top: calc(var(--y) * 1px);
  left: calc(var(--x) * 1px);
  width: calc(var(--d) * 1px);
  height: calc(var(--d) * 1px);
  opacity: calc(var(--o, 1) * var(--ripple-opacity, 0.3));
  transition: calc(var(--t, 0) * var(--ripple-duration, 600ms)) var(--ripple-easing, linear);
  -webkit-transform: translate(-50%, -50%) scale(var(--s, 1));
  transform: translate(-50%, -50%) scale(var(--s, 1));
  -webkit-transform-origin: center;
  transform-origin: center;
}

.btn {
  --ripple-background: white;
  --ripple-opacity: 0.3;
  --ripple-duration: 600ms;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}