docs: fix diagram and code visibility in light/dark modes

- Remove hardcoded Mermaid diagram colors for auto-theme adaptation
- Add dark mode inline code styling (light text on dark background)

Diagrams now render correctly in both light and dark modes. Inline code is readable regardless of theme.

Author: kdroidFilter

docs/auto-update.md

@@ -20,8 +20,6 @@ flowchart LR
         verify --> launch["Launch installer"]
     end
 
-    style build fill:#0f3460,stroke:#16213e,color:#e0e0e0
-    style host fill:#533483,stroke:#16213e,color:#e0e0e0
 ```
 
 !!! tip "Try it yourself"

docs/ci-cd.md

@@ -33,9 +33,6 @@ flowchart TB
     macos_sign --> publish["Publish — GitHub Release\n+ Update YML metadata"]
     msix --> publish
 
-    style tag fill:#e94560,stroke:#16213e,color:#e0e0e0
-    style build fill:#1a1a2e,stroke:#16213e,color:#e0e0e0
-    style publish fill:#0f3460,stroke:#16213e,color:#e0e0e0
 ```
 
 ## `setup-nucleus` Action

docs/graalvm/automatic-metadata.md

@@ -61,8 +61,6 @@ flowchart LR
     serial --> out
     callback --> out
 
-    style scan fill:#0f3460,stroke:#16213e,color:#e0e0e0
-    style out fill:#533483,stroke:#16213e,color:#e0e0e0
 ```
 
 ## Level 5 — Generic cross-platform metadata
@@ -94,10 +92,6 @@ flowchart TB
     -H:ConfigurationFileDirectories=...`"]
     NI --> bin["Native binary"]
 
-    style build fill:#1a1a2e,stroke:#16213e,color:#e0e0e0
-    style merge fill:#0f3460,stroke:#16213e,color:#e0e0e0
-    style NI fill:#533483,stroke:#16213e,color:#e0e0e0
-    style bin fill:#e94560,stroke:#16213e,color:#e0e0e0
 ```
 
 All of this happens transparently — no manual steps required. The result is that **most applications compile and run as native images without any manual reflection configuration**.

docs/native-access/index.md

@@ -15,8 +15,6 @@ flowchart TB
     B --> C["Your JVM code calls it like normal Kotlin"]
 
     B@{ shape: rect }
-
-    style B fill:#0f3460,stroke:#16213e,color:#e0e0e0
 ```
 
 The plugin:

docs/runtime/notification-windows.md

@@ -122,9 +122,6 @@ graph TB
     inputs --> textbox["ToastTextBox"]
     inputs --> selbox["ToastSelectionBox"]
 
-    style TC fill:#0f3460,stroke:#16213e,color:#e0e0e0
-    style visual fill:#533483,stroke:#16213e,color:#e0e0e0
-    style actions fill:#533483,stroke:#16213e,color:#e0e0e0
 ```
 
 ### Data Types

docs/stylesheets/extra.css

@@ -53,3 +53,9 @@
 .md-social {
   display: none;
 }
+
+/* Inline code readability in dark mode */
+[data-md-color-scheme="slate"] .md-typeset code {
+  background-color: #1e293b;
+  color: #e2e8f0;
+}