Theme: Obsdn-Dark-Rmx (now with Light & Dark) - updated 2020-09-11

Thank you for putting this all together!

Here are some snippets I added, seen elsewhere in the forum.

Tags in editor: Meta Post - Common CSS Hacks - #64 by rsdimitrov

div:not(.CodeMirror-activeline) > .CodeMirror-line span.cm-hashtag-end:before {
content: '#';
}

.tag, div:not(.CodeMirror-activeline) > .CodeMirror-line span.cm-hashtag-end {
  background-color: var(--text-accent);
  border: none;
  color: white !important;
  font-size: 11px;
  padding: 1px 8px;
  text-align: center;
  text-decoration: none !important;
  display: inline-block;
  margin: 0px 0px;
  cursor: pointer;
  border-radius: 14px;
}

And a nicer blockquote, slightly modified version of this : Meta Post - Common CSS Hacks - #39 by Thery

/* Add quotation character before quote */
blockquote:before {
    font: 14px/20px italic Times, serif;
    content: "“";
    font-size: 3em;
    line-height: 0.1em;
    vertical-align: -0.4em;
  }
  blockquote p { display: block; 
    padding-inline-start: 2em;
    position: relative;
    top:-1em}
  /* Remove blockquote left margin */
blockquote {
    margin-inline-start: 0;
  }