Fix invalid CSS syntax

[Josh-Cena]

Fix some broken CSS

[github-actions]

Preview URLs (20 pages)

• /en-US/docs/Learn_web_development/Core/Frameworks_libraries/Vue_styling
• /en-US/docs/Learn_web_development/Howto/Solve_CSS_problems/CSS_FAQ
• /en-US/docs/Web/API/CSSNestedDeclarations/style
• /en-US/docs/Web/API/CSSNestedDeclarations
• /en-US/docs/Web/API/HTMLImageElement/crossOrigin
• /en-US/docs/Web/API/HTMLLinkElement/hreflang
• /en-US/docs/Web/CSS/-webkit-mask-box-image
• /en-US/docs/Web/CSS/-webkit-mask-repeat-x
• /en-US/docs/Web/CSS/-webkit-mask-repeat-y
• /en-US/docs/Web/CSS/:-moz-loading
• /en-US/docs/Web/CSS/CSS_box_sizing/Understanding_aspect-ratio
• /en-US/docs/Web/CSS/CSS_cascade/Cascade
• /en-US/docs/Web/CSS/CSS_cascade/Specificity
• /en-US/docs/Web/CSS/CSS_containment/Using_CSS_containment
• /en-US/docs/Web/CSS/CSS_nesting/Nesting_and_specificity
• /en-US/docs/Web/CSS/CSS_nesting/Using_CSS_nesting
• /en-US/docs/Web/CSS/calc-keyword
• /en-US/docs/Web/CSS/flex
• /en-US/docs/Web/CSS/transform-function/rotate3d
• /en-US/docs/Web/CSS/transform-origin

Flaws (6)

Note! 16 documents with no flaws that don't need to be listed. 🎉

URL: /en-US/docs/Web/CSS/-webkit-mask-box-image
Title: -webkit-mask-box-image
Flaw count: 2

• broken_links:
  • Can't resolve /en-US/docs/Web/CSS/mask-image-source
  • Can't resolve /en-US/docs/Web/CSS/mask-image-offset

---

URL: /en-US/docs/Web/CSS/calc-keyword
Title: <calc-keyword>
Flaw count: 2

• macros:
  • Can't resolve /en-US/docs/Web/CSS/calc-product
  • Can't resolve /en-US/docs/Web/CSS/calc-value

---

URL: /en-US/docs/Web/CSS/flex
Title: flex
Flaw count: 1

• broken_links:
  • Can't resolve /en-US/docs/Web/CSS/size-keyword

---

URL: /en-US/docs/Web/CSS/transform-function/rotate3d
Title: rotate3d()
Flaw count: 1

• broken_links:
  • Can't resolve /en-US/docs/Web/CSS/zero

(comment last updated: 2025-06-02 11:50:30)

[bsmth]

One small suggestion for https://developer.mozilla.org/en-US/docs/Web/CSS/transform-function/rotate3d

Otherwise, ready, thanks 👍🏻