Remove outdated warning and update link of @page

files/en-us/web/css/@page/index.md

@@ -154,16 +154,13 @@ Where the `<page-body>` includes:
 
 and `<pseudo-page>` represents these pseudo-classes:
 
-- [`:blank`](https://drafts.csswg.org/css-page/#blank-pseudo)
+- {{Cssxref(":blank")}}
 - {{Cssxref(":first")}}
 - {{Cssxref(":left")}}
 - {{Cssxref(":right")}}
 
 ## Margin at-rules
 
-> [!WARNING]
-> The margin at-rules have not been implemented by any user agent (updated: August 2023).
-
 The margin at-rules are used inside of the `@page` at-rule. They each target a different section of the document printed page, styling the area of the printed page based on the property values set in the style block:
 
 ```css
@@ -385,13 +382,14 @@ button.addEventListener("click", () => {
 #### Result
 
 Clicking the print button will launch a print dialog with the html sections split into individual pages.
-{{ EmbedLiveSample('Using the size property to change the page orientation', '100%', 520) }}
+
+{{EmbedLiveSample('Using the size property to change the page orientation', '100%', 520)}}
 
 ### @page pseudo-class examples
 
 Please refer to the various [pseudo-classes](/en-US/docs/Web/CSS/Pseudo-classes) of `@page` for examples.
 
-- [`:blank`](https://drafts.csswg.org/css-page/#blank-pseudo)
+- {{Cssxref(":blank")}}
 - {{Cssxref(":first")}}
 - {{Cssxref(":left")}}
 - {{Cssxref(":right")}}