umami/components/settings/SettingsButton.module.css

.button {
  position: relative;
}

.panel {
  background: var(--gray50);
  border: 1px solid var(--gray500);
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 100%;
  right: 0;
  padding: 20px;
  z-index: 100;
}

.panel dd {
  display: flex;
}