The DIY “perfect phone” hero shot

{
  "input": {
    "prompt": " Studio photo of a custom-built smartphone lying on a clean tabletop, screen on, showing a Linux desktop (tiling window manager or simple GNOME/KDE panel) to immediately signal “this is not Android/iOS.” The case is clearly 3D-printed in multiple plastic colors (e.g., teal, magenta, yellow accents) with visible layer lines and purposeful cutouts. Lighting should highlight the texture and handmade character. No visible brand logos on screen; use generic wallpaper and fake app/window names."
  }
}