#top {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  padding: 0;
  margin: 0;
  width: 100%;
}

#top .container {
  padding-top: 50px;
}

#top .triangle-button {
  top: 0;
}

#top .triangle-button::before { 
  transform: rotate(90deg);
}