diff --git a/doc/org/.dir-locals.el.in b/doc/org/.dir-locals.el.in
index fcc80f346..324e84ec9 100644
--- a/doc/org/.dir-locals.el.in
+++ b/doc/org/.dir-locals.el.in
@@ -40,6 +40,8 @@
 	      (shell-file-name . "@SHELL@")
               (ess-ask-for-ess-directory . nil)
               (org-export-html-postamble . nil)
+              (org-html-table-header-tags .
+                 '("<th scope=\"%s\"%s><div><span>" . "</span></div></th>"))
               (org-babel-default-header-args:plantuml
                . ((:results . "file")
                   (:exports . "results")
diff --git a/doc/org/init.el.in b/doc/org/init.el.in
index cfa43eefd..50161fc4f 100644
--- a/doc/org/init.el.in
+++ b/doc/org/init.el.in
@@ -107,6 +107,8 @@
 </div>")
 
 (setq org-export-html-postamble nil)
+(setq org-html-table-header-tags
+      '("<th scope=\"%s\"%s><div><span>" . "</span></div></th>"))
 
 (defun spot-publish-sitemap (title list)
   "Same as org-publish-sitemap-default except it adds the SETUPFILE."
diff --git a/doc/org/spot.css b/doc/org/spot.css
index 0dbe505ae..78a03f19d 100644
--- a/doc/org/spot.css
+++ b/doc/org/spot.css
@@ -26,6 +26,10 @@ pre.src-C\+\+:before{content:'C++'}
 pre.src-hoa:before{content:'HOA';border-color:#d70079}
 img{max-width:100%}
 svg.org-svg{width:auto;max-width:100%}
+table.csv-table {font-family:monospace, courier}
+table.csv-table th {vertical-align:bottom}
+table.csv-table th div {text-align:center}
+table.csv-table th div span{text-align:left;writing-mode:vertical-lr;transform:rotate(180deg);display:inline-block;white-space:nowrap}
 @media screen{
 #table-of-contents{position:fixed;right:0em;top:0em;max-width:50%;max-height:80%;overflow:auto;z-index:10}
 #table-of-contents #text-table-of-contents{display:none}