non-copyable line numbers

_posts/2015-08-28-vim-for-man.md

@@ -83,7 +83,7 @@ a manpage no matter how I opened it. Hence, they should really be in Vim's
 filetype settings for `man`. So, I created a `~/.vim/ftplugin/man.vim`,
 containing:
 
-{% highlight vim linenos %}
+{% highlight vim lineanchors %}
 function! PrepManPager()
 	if !empty ($MAN_PN)
 		silent %! col -b
@@ -118,7 +118,7 @@ A bit of experimentation later, I found that:
 Knowing that I'm reading from `stdin` and that `MAN_PN` is set (to the manpage
 name!), I came up with this version:
 
-{% highlight vim linenos %}
+{% highlight vim lineanchors %}
 " vimrc
 if !empty($MAN_PN)
 	autocmd StdinReadPost * set ft=man | file $MAN_PN

styles/posts.css

@@ -26,12 +26,28 @@ img {
 	max-width: 100%;
 }
 
-.linenos, .lineno {
+/* 
+ * From http://drewsilcock.co.uk/proper-linenumbers/
+ */
+
+pre {
+    counter-reset: line-numbering;
+}
+
+pre a::before {
+  content: counter(line-numbering);
+  counter-increment: line-numbering;
+  padding-right: 1em; /* space after numbers */
+  text-align: right;
+  opacity: 0.4;
+  display: inline-block;
+  -webkit-touch-callout: none;
   -webkit-user-select: none;
   -khtml-user-select: none;
-    -moz-user-select: -moz-none;
-    -o-user-select: none;
+  -moz-user-select: none;
+  -ms-user-select: none;
   user-select: none;
+  min-width: 1em;
 }
 
 @media screen and (orientation:landscape) {