#buttonContainer {
  position: absolute;
  bottom: 0;
  width: 100%;
  display: flex;
  justify-content: center;
  gap: 0;
}
#buttonContainer button {
  flex: 1;
  font-size: 2em;
  padding: 12px 0;
  border: 1px solid #999;
  background: rgba(255,255,255, 0.6);
  cursor: pointer;
  border-radius: 0;
}

#buttonContainer button:hover{
  background: #aaaaaa;
}