fix(guide): restructure curriculum guide articles (#36501)

* fix: restructure certifications guide articles
* fix: added 3 dashes line before prob expl
* fix: added 3 dashes line before hints
* fix: added 3 dashes line before solutions

guide/english/certifications/responsive-web-design/css-grid/create-your-first-css-grid/index.md

@@ -1,15 +1,19 @@
 ---
 title: Create Your First CSS Grid
 ---
-## Create Your First CSS Grid
+# Create Your First CSS Grid
+
+
+---
+## Hints
 
 ### Hint 1
 
 To change display of any element, the following syntax is used:
 
-````css
+```css
 display: propertyName;
-````
+```
 
 ### Hint 2
 
@@ -19,10 +23,16 @@ Change the display property of the .container element
 
 Set the display of the .container element to grid
 
-### Solution
+
+---
+## Solutions
+
+<details><summary>Solution 1 (Click to Show/Hide)</summary>
 
 To set the display of the .container element to grid:
 
-````css
+```css
 display: grid;
-````
+```
+
+</details>