footer{
  background-color: var(--swamp); 
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.cta-button {
  background-color: var(--main);
  padding: 14px 30px;
  border-radius: 10px;
}

@media (max-width: 639px) {
  .cta-bar .cell {
    margin: 10px auto;
  }  
}