📚 DOCS: Add big summary card (#404)

Author: choldgraf

docs/conf.py

@@ -62,6 +62,9 @@
 ogp_site_url = "https://myst-parser.readthedocs.io/en/latest"
 # This is the image that GitHub stores for our social media previews
 ogp_image = "https://repository-images.githubusercontent.com/240151150/316bc480-cc23-11eb-96fc-4ab2f981a65d"  # noqa: E501
+ogp_custom_meta_tags = [
+    '<meta name="twitter:card" content="summary_large_image">',
+]
 
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,

docs/index.md

@@ -9,7 +9,7 @@ MyST is a flavor of markdown that is designed for simplicity, flexibility, and e
 
 :::{panels}
 :container: +full-width text-center
-:column: col-4 px-2 py-2
+:column: col-lg-4 px-2 py-2
 :card:
 
 **[CommonMark compliant](commonmark-block-tokens)** ✔
@@ -51,7 +51,7 @@ In addition, here are a few pointers to help you get started.
 
 :::{panels}
 :container: full-width
-:column: col-4 p-2
+:column: col-lg-4 p-2
 ---
 :header: bg-myst-one
 **Get started with MyST**