How to disable CSD in Wayland?

[geekthought]

I am using the tiling wm Sway on Arch and have shadows on floating windows.

This seemed to be the same issue a few years ago:

#138

I added the tiling hacks to .config/gtk-3/gtk.css. No luck. How can I remove these shadows?

Added to gtk.css:
Using with tiling WMs

Create/append to ~/.config/gtk-3.0/gtk.css:

/* remove window title from Client-Side Decorations */
.solid-csd headerbar .title {
font-size: 0;
}

/* hide extra window decorations/double border */
window decoration {
margin: 0;
border: none;
padding: 0;
}

Extra GTK3 CSS hacks

Create/append to ~/.config/gtk-3.0/gtk.css:

• {
  text-shadow: none;
  }

[actionless]

idk, i don't have wayland setup to test, feel free to update the docs