:host {
  background-color: rgba(var(--smoothly-default-color), 1);
  opacity: var(--opacity);
  pointer-events: var(--pointer-events);
  transition: opacity 400ms;
  z-index: 3;
  border-radius: 50%;
  box-shadow: var(--smoothly-shadow);
  height: 3rem;
  width: 3rem;
  position: fixed;
  bottom: var(--bottom);
  right: var(--right);
  outline: none;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
}