.my-float-button {
  position: fixed;
  bottom: 80px;
  right: 20px;
  z-index: 9999;
  background-image: url('./KakaoTalk_logo.svg.png');
  background-size: cover;
  width: 60px;
  height: 60px;
  display: block;
  text-indent: -9999px;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
}

/* PC용 */
@media (min-width: 768px) {
  .my-float-button {
    bottom: 40px;
    right: 40px;
  }
}