.quick-add-button {
  display: none;
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 120;
  width: 58px;
  height: 58px;
  border: 1px solid rgba(100, 216, 255, 0.5);
  border-radius: 18px;
  color: #fff;
  background: #118ed1;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.34);
  font-size: 29px;
  cursor: pointer;
}

@media (max-width: 860px) {
  .quick-add-button {
    display: grid;
    place-items: center;
  }

  body.auth-open .quick-add-button,
  body.modal-open .quick-add-button {
    display: none;
  }
}