github wiki replacement / mkdocs-docs (#2147)

* Add wiki based on mkdocs

* wording fixes

* fix github bg color on narrow

* Fix left sidebar section headers being bigger than pages

* fix hover accent

* fix list rendering on fractional layout

* fix videos

* fix automatic full links

* remove redundant commented css

* improve dark mode contrast

* update pygments for better child node coloring

* update logo

* remove blank lines

* add systemd language hint

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Co-authored-by: Ivan Molodetskikh <yalterz@gmail.com>

1 files changed, 0 insertions, 193 deletions

diff --git a/wiki/Configuration:-Layer-Rules.md b/wiki/Configuration:-Layer-Rules.md
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--- a/wiki/Configuration:-Layer-Rules.md
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-### Overview
-
-<sup>Since: 25.01</sup>
-
-Layer rules let you adjust behavior for individual layer-shell surfaces.
-They have `match` and `exclude` directives that control which layer-shell surfaces the rule should apply to, and a number of properties that you can set.
-
-Layer rules are processed and work very similarly to window rules, just with different matchers and properties.
-Please read the [window rules wiki page](./Configuration:-Window-Rules.md) to learn how matching works.
-
-Here are all matchers and properties that a layer rule could have:
-
-```kdl
-layer-rule {
-    match namespace="waybar"
-    match at-startup=true
-
-    // Properties that apply continuously.
-    opacity 0.5
-    block-out-from "screencast"
-    // block-out-from "screen-capture"
-
-    shadow {
-        on
-        // off
-        softness 40
-        spread 5
-        offset x=0 y=5
-        draw-behind-window true
-        color "#00000064"
-        // inactive-color "#00000064"
-    }
-
-    geometry-corner-radius 12
-    place-within-backdrop true
-    baba-is-float true
-}
-```
-
-### Layer Surface Matching
-
-Let's look at the matchers in more detail.
-
-#### `namespace`
-
-This is a regular expression that should match anywhere in the surface namespace.
-You can read about the supported regular expression syntax [here](https://docs.rs/regex/latest/regex/#syntax).
-
-```kdl
-// Match surfaces with namespace containing "waybar",
-layer-rule {
-    match namespace="waybar"
-}
-```
-
-You can find the namespaces of all open layer-shell surfaces by running `niri msg layers`.
-
-#### `at-startup`
-
-Can be `true` or `false`.
-Matches during the first 60 seconds after starting niri.
-
-```kdl
-// Show layer-shell surfaces with 0.5 opacity at niri startup, but not afterwards.
-layer-rule {
-    match at-startup=true
-
-    opacity 0.5
-}
-```
-
-### Dynamic Properties
-
-These properties apply continuously to open layer-shell surfaces.
-
-#### `block-out-from`
-
-You can block out surfaces from xdg-desktop-portal screencasts or all screen captures.
-They will be replaced with solid black rectangles.
-
-This can be useful for notifications.
-
-The same caveats and instructions apply as for the [`block-out-from` window rule](./Configuration:-Window-Rules.md#block-out-from), so check the documentation there.
-
-![Screenshot showing a notification visible normally, but blocked out on OBS.](./img/layer-block-out-from-screencast.png)
-
-```kdl
-// Block out mako notifications from screencasts.
-layer-rule {
-    match namespace="^notifications$"
-
-    block-out-from "screencast"
-}
-```
-
-#### `opacity`
-
-Set the opacity of the surface.
-`0.0` is fully transparent, `1.0` is fully opaque.
-This is applied on top of the surface's own opacity, so semitransparent surfaces will become even more transparent.
-
-Opacity is applied to every child of the layer-shell surface individually, so subsurfaces and pop-up menus will show window content behind them.
-
-```kdl
-// Make fuzzel semitransparent.
-layer-rule {
-    match namespace="^launcher$"
-
-    opacity 0.95
-}
-```
-
-#### `shadow`
-
-<sup>Since: 25.02</sup>
-
-Override the shadow options for the surface.
-
-These rules have the same options as the normal [`shadow` config in the layout section](./Configuration:-Layout.md#shadow), so check the documentation there.
-
-Unlike window shadows, layer surface shadows always need to be enabled with a layer rule.
-That is, enabling shadows in the layout config section won't automatically enable them for layer surfaces.
-
-> [!NOTE]
-> Layer surfaces have no way to tell niri about their *visual geometry*.
-> For example, if a layer surface includes some invisible margins (like mako), niri has no way of knowing that, and will draw the shadow behind the entire surface, including the invisible margins.
->
-> So to use niri shadows, you'll need to configure layer-shell clients to remove their own margins or shadows.
-
-```kdl
-// Add a shadow for fuzzel.
-layer-rule {
-    match namespace="^launcher$"
-
-    shadow {
-        on
-    }
-
-    // Fuzzel defaults to 10 px rounded corners.
-    geometry-corner-radius 10
-}
-```
-
-#### `geometry-corner-radius`
-
-<sup>Since: 25.02</sup>
-
-Set the corner radius of the surface.
-
-This setting will only affect the shadow—it will round its corners to match the geometry corner radius.
-
-```kdl
-layer-rule {
-    match namespace="^launcher$"
-
-    geometry-corner-radius 12
-}
-```
-
-#### `place-within-backdrop`
-
-<sup>Since: 25.05</sup>
-
-Set to `true` to place the surface into the backdrop visible in the [Overview](./Overview.md) and between workspaces.
-
-This will only work for *background* layer surfaces that ignore exclusive zones (typical for wallpaper tools).
-Layers within the backdrop will ignore all input.
-
-```kdl
-// Put swaybg inside the overview backdrop.
-layer-rule {
-    match namespace="^wallpaper$"
-
-    place-within-backdrop true
-}
-```
-
-#### `baba-is-float`
-
-<sup>Since: 25.05</sup>
-
-Make your layer surfaces FLOAT up and down.
-
-This is a natural extension of the [April Fools' 2025 feature](./Configuration:-Window-Rules.md#baba-is-float).
-
-```kdl
-// Make fuzzel FLOAT.
-layer-rule {
-    match namespace="^launcher$"
-
-    baba-is-float true
-}
-```