frontend/src/app/app.component.scss

.sidebar {
  max-width: 20em !important;
}

@media (prefers-color-scheme: no-preference) {
  ion-toolbar {
    --background: black;
    color: white;
  }
  :root {
    --background: black;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: black;
    color: white;
  }
}

/* Fallback for older browsers or manual mode */
.dark {
  --background: black !important;
  color: white !important;
}