Another Sticky Button

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.sticky-button {
  z-index: -1;
  position: fixed;
  left: 15px;
  bottom: 15px;
  background: #DD1616;
  padding: 8px 12px !important;
  border-radius: 50px;
  color: #ffffff;
  font-size: 18px;
  font-weight: 900;
  text-decoration: none;
}