#footer {
  display: none;
  align-items: center;
  text-align: center;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: #fff;
  padding: 10px 0;
  box-shadow: 0 -1px 3px rgba(0,0,0,0.1);
  z-index: 999999;
}
html.waiting-file #footer {
  display: flex;
}

.footer-left,
.footer-right {
  flex: 0 0 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.footer-left a {
  width: 80%;
  text-align: center;
  color: #007bff;
  text-decoration: none;
}
.footer-left a:hover {
  text-decoration: underline;
}
.footer-right label {
  width: 16%;
  text-align: center;
}
.footer-right select {
  width: 64%;
  text-align: center;
  background-color: #f5f5f5;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 0.25em 0.5em;
}

@media (max-width: 600px) {
  #footer {
    flex-direction: column;
  }
  .footer-left,
  .footer-right {
    flex: none;
    width: 100%;
  }
  .footer-left a,
  .footer-right select {
    margin: 5px 0;
  }
}