fix: custom stylesheet documentation (closes #103)

config.toml

@@ -41,7 +41,9 @@ socials = [
     { name = "github", url = "https://github.com/not-matthias/", icon = "github" },
 ]
 
-custom_css = []
+stylesheets = [
+    #"custom.css"    # at /static/custom.css
+]
 
 [extra.analytics]
 enabled = false

content/posts/configuration.md

@@ -118,6 +118,20 @@ Specifies the path to the favicon image for your blog.
 
 This sets the small icon that appears in the browser tab for your website.
 
+## Custom Stylesheets (`stylesheets`)
+
+Allows you to add custom stylesheets to your blog.
+
+- Type: Array of files located in the `static` directory
+- Default: []
+- Usage:
+  ```toml
+  stylesheets = [
+    "custom.css",           # static/custom.css
+    "/css/another.css"      # static/css/another.css
+  ]
+  ```
+
 ## Fancy Code Styling (`fancy_code`)
 
 Enables enhanced styling for code blocks.