small updates

README.md

@@ -10,7 +10,7 @@
 - includes some [extended markdown syntax](https://markdownguide.org/extended-syntax/)
 
 ## preview
-- live: https://dym.sh/markdown-raw/live/
+- live: https://dym.sh/markdown-raw/
 - codepen: https://codepen.io/dym-sh/pen/XWKbYVP/left/?editors=1100
 
-<a href='./preview.png'><img height=600 border=2 alt='preview' src='./preview.png'></a>
+<a href='./th.png'><img height=600 border=2 alt='preview' src='./th.png'></a>

index.html

@@ -3,14 +3,21 @@
 <title>markdown.raw()</title>
 <meta name='viewport' content='width=device-width, initial-scale=1.0'>
 <link href='markdown.css' rel='stylesheet'>
-
+<meta name="og:title"        content="markdown.raw()">
+<meta name="og:site_name"    content="markdown.raw()">
+<meta name="description"     content="CSS style to make HTML look like raw markdown">
+<meta name="og:description"  content="CSS style to make HTML look like raw markdown">
+<meta name="og:type"         content="website">
+<meta name="og:url"          content="https://dym.sh/markdown-raw/">
+<meta name="og:image"        content="https://dym.sh/markdown-raw/th.png">
+<meta name="twitter:card"    content="summary_large_image">
 
 <table cellpadding=20 cellspacing=20 width=100%>
 <thead>
   <th colspan=2>
     markdown.raw() – CSS style to make HTML look like raw markdown
-    <br><br>uses CSS4 <a href='https://developer.mozilla.org/en-US/docs/Web/CSS/:is#Browser_compatibility'>:is()</a>
-    <br><br>more info on <a href='https://github.com/dym-sh/markdown-raw'>github</a>
+    <br><br>by <a href='https://dym.sh'>Dym Sohin</a>
+    <br><br>code <a href='https://source.garden/dym/markdown-raw'>repo</a>
     <br><br>
   </th>
 </thead>