diff --git a/engine/optim-classes.sh b/engine/optim-classes.sh
index d632534..1890b3a 100755
--- a/engine/optim-classes.sh
+++ b/engine/optim-classes.sh
@@ -1,4 +1,6 @@
-#!/bin/zsh
+#!/usr/bin/env nix-shell
+#!nix-shell -i zsh
+#!nix-shell -I nixpkgs="https://github.com/NixOS/nixpkgs/archive/19.09.tar.gz"
 
 cd $(git rev-parse --show-toplevel)
 webdir="_site"
diff --git a/engine/shell.nix b/engine/shell.nix
new file mode 100644
index 0000000..0eab84d
--- /dev/null
+++ b/engine/shell.nix
@@ -0,0 +1,11 @@
+# { pkgs ? import <nixpkgs> {} }:
+{ pkgs ? import (fetchTarball https://github.com/NixOS/nixpkgs/archive/19.09.tar.gz) {} }:
+  pkgs.mkShell {
+    buildInputs = [ pkgs.coreutils
+                    pkgs.html-xml-utils
+                    pkgs.zsh
+                    pkgs.perl
+                    pkgs.perlPackages.URI
+                    pkgs.minify
+                  ];
+  }
diff --git a/project.el.sig b/project.el.sig
index 1873af1..b1ea0bb 100644
Binary files a/project.el.sig and b/project.el.sig differ
diff --git a/src/css/min.css b/src/css/min.css
index 9868e8b..9c0809a 100644
--- a/src/css/min.css
+++ b/src/css/min.css
@@ -60,3 +60,50 @@ body > input {
     background: #FFF;
     color: #333;
 }
+
+/* ---- SYNTAX HIGHLIGHTING ---- */
+.org-rainbow-delimiters-depth-1, .org-rainbow-delimiters-depth-9,
+.org-css-selector, .org-nix-attribute, .org-builtin,
+.IN_REVIEW, a {
+    color:var(--c);
+}
+
+.org-rainbow-delimiters-depth-2, .org-nix-builtin, .org-variable-name,
+.org-haskell-definition, .org-haskell-operator, .org-function-name, .org-diff-changed {
+    color:var(--b);
+}
+
+.org-rainbow-delimiters-depth-3, .HOLD, .WAITING {
+    color:var(--v);
+}
+
+.org-rainbow-delimiters-depth-4, .org-diff-hunk-header, .org-sh-quoted-exec,
+.CANCELED {
+    color:var(--m);
+}
+.org-rainbow-delimiters-depth-5, .org-diff-removed, .TODO {
+    color:var(--r);
+}
+.org-rainbow-delimiters-depth-6, .org-haskell-constructor  {
+    color:var(--o);
+}
+.org-rainbow-delimiters-depth-7, .org-type, .org-constant, .org-diff-header,
+.org-haskell-keyword, .org-haskell-type, .IN_PROGRESS {
+    color:var(--y);
+}
+.org-rainbow-delimiters-depth-8, .org-sh-heredoc, .org-diff-added, .org-string,
+.org-doc, .org-keyword, .DONE {
+    color:var(--g);
+}
+
+.org-diff-none, .org-preprocessor, .org-comment-delimiter, .org-comment,
+.org-outshine-level-1, .org-outshine-level-2, .org-outshine-level-3,
+.org-outshine-level-4, .org-outshine-level-5, .org-outshine-level-6,
+.org-outshine-level-7, .org-outshine-level-8, .org-outshine-level-9 {
+    color:var(--fg2);
+}
+
+.org-highlight-numbers-number, .org-highlight-number-number
+ {
+    color:var(--rfg);
+}
diff --git a/src/css/mk.css b/src/css/mk.css
index 35eac58..bf8286f 100644
--- a/src/css/mk.css
+++ b/src/css/mk.css
@@ -3,11 +3,11 @@
 */
 /* Fonts */
 :root {
-    --lh: 16px;
+    --lh: 15px;
 }
 body {
-    font-size: 14px/1.4;
-    font-family: Menlo, monaco, monospace;
+    font-size: 13px;
+    font-family: Menlo, monospace;
     line-height: var(--lh);
 }
 pre, pre code {