#join-group-form-overlay {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, .5);
  display: flex;
  align-items: center;
  justify-content: center;
}

#join-group-form-wrapper {
  background-color: #fff;
  max-width: calc(100% - 30px);
  width: 800px;
  padding: 2rem;
  box-shadow: 0 0 5px 5px #ddd;
}