diff --git a/doom/.config/doom/README.org b/doom/.config/doom/README.org
index 5613a20..a9a407a 100644
--- a/doom/.config/doom/README.org
+++ b/doom/.config/doom/README.org
@@ -48,6 +48,10 @@ they are implemented.
 Place your private configurations. It is optional.
 
 #+begin_src emacs-lisp
+(setq org-src-coderef-format nil)
+
+(setq org-src-coderef-format nil)
+
 (setq user-full-name "Thierry Pouplier"
       user-mail-address "tpouplier@tdnde.com")
 #+end_src
diff --git a/doom/.config/doom/config.el b/doom/.config/doom/config.el
index b087f19..d485358 100644
--- a/doom/.config/doom/config.el
+++ b/doom/.config/doom/config.el
@@ -1,5 +1,9 @@
 ;;; $DOOMDIR/config.el -*- lexical-binding: t; -*-
 
+(setq org-src-coderef-format nil)
+
+(setq org-src-coderef-format nil)
+
 (setq user-full-name "Thierry Pouplier"
       user-mail-address "tpouplier@tdnde.com")
 
diff --git a/doom/.config/doom/nil b/doom/.config/doom/nil
new file mode 100644
index 0000000..951d4bc
--- /dev/null
+++ b/doom/.config/doom/nil
@@ -0,0 +1,33 @@
+(setq doom-theme 'doom-gruvbox)
+;; Enable flashing mode-line on errors
+(doom-themes-visual-bell-config)
+;; Corrects (and improves) org-mode's native fontification.
+(doom-themes-org-config)
+
+(after! org
+  ;; 1. Update existing faces (Org defines 1-8 by default)
+  (set-face-attribute 'org-document-title nil :height 2.0 :weight 'bold)
+  (set-face-attribute 'org-level-1 nil :weight 'semi-bold :height 1.45)
+  (set-face-attribute 'org-level-2 nil :weight 'semi-bold :height 1.35)
+  (set-face-attribute 'org-level-3 nil :weight 'semi-bold :height 1.25)
+  (set-face-attribute 'org-level-4 nil :weight 'semi-bold :height 1.15)
+  (set-face-attribute 'org-level-5 nil :weight 'normal :height 1.10)
+  (set-face-attribute 'org-level-6 nil :weight 'normal :height 1.05)
+  (set-face-attribute 'org-level-7 nil :weight 'normal :height 1.02)
+  (set-face-attribute 'org-level-8 nil :weight 'normal :height 1.00)
+
+  ;; 2. Create missing faces (9-20) and inherit them directly from org-level-8
+  (cl-loop for lvl from 9 to 20
+           do (let ((face-name (intern (format "org-level-%d" lvl))))
+                (custom-declare-face face-name
+                                     '((t :inherit org-level-8))
+                                     (format "Face for org heading level %d." lvl)
+                                     :group 'org-faces)))
+
+  ;; 3. Add the newly created faces to Org's level list
+  (setq org-level-faces
+        (append org-level-faces
+                (mapcar (lambda (lvl) (intern (format "org-level-%d" lvl)))
+                        (number-sequence 9 20))))
+
+  (setq org-n-level-faces (length org-level-faces)))