diff --git a/app/assets/styles/_variables.scss b/app/assets/styles/_variables.scss
new file mode 100644
index 0000000..20ed590
--- /dev/null
+++ b/app/assets/styles/_variables.scss
@@ -0,0 +1 @@
+$h1-font-size: 3.5rem; //bigger
diff --git a/app/assets/styles/app.scss b/app/assets/styles/app.scss
index 8455cf4..aae2ea6 100644
--- a/app/assets/styles/app.scss
+++ b/app/assets/styles/app.scss
@@ -1,8 +1,15 @@
+// override bootstrap variables
+@import "_variables";
+
+// import Bootstrap 5 styles
+@import "~bootstrap/scss/bootstrap";
+
+
 body {
-    background-color: lightgray;
-    padding: 5em;
+    //background-color: lightgray;
+    //padding: 3em;
     div#boum {
-      background-color: white;
+      //background-color: white;
       padding: 1em;
       border: 1px solid grey;
    }
diff --git a/app/config/packages/twig.yaml b/app/config/packages/twig.yaml
index f9f4cc5..3be7d52 100644
--- a/app/config/packages/twig.yaml
+++ b/app/config/packages/twig.yaml
@@ -1,5 +1,6 @@
 twig:
     default_path: '%kernel.project_dir%/templates'
+    form_themes: ['bootstrap_5_layout.html.twig']
 
 when@test:
     twig:
diff --git a/app/package.json b/app/package.json
index 56ea6f4..8bd8632 100644
--- a/app/package.json
+++ b/app/package.json
@@ -5,6 +5,7 @@
         "@hotwired/stimulus": "^3.0.0",
         "@symfony/stimulus-bridge": "^3.2.0",
         "@symfony/webpack-encore": "^4.0.0",
+        "bootstrap": "^5.2.1",
         "core-js": "^3.23.0",
         "regenerator-runtime": "^0.13.9",
         "webpack": "^5.74.0",
diff --git a/app/yarn.lock b/app/yarn.lock
index 14ff8b7..dd04734 100644
--- a/app/yarn.lock
+++ b/app/yarn.lock
@@ -1829,6 +1829,11 @@ boolbase@^1.0.0:
   resolved "https://registry.yarnpkg.com/boolbase/-/boolbase-1.0.0.tgz#68dff5fbe60c51eb37725ea9e3ed310dcc1e776e"
   integrity sha512-JZOSA7Mo9sNGB8+UjSgzdLtokWAky1zbztM3WRLCbZ70/3cTANmQmOdR7y2g+J0e2WXywy1yS468tY+IruqEww==
 
+bootstrap@^5.2.1:
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/bootstrap/-/bootstrap-5.2.1.tgz#45f97ff05cbe828bad807b014d8425f3aeb8ec3a"
+  integrity sha512-UQi3v2NpVPEi1n35dmRRzBJFlgvWHYwyem6yHhuT6afYF+sziEt46McRbT//kVXZ7b1YUYEVGdXEH74Nx3xzGA==
+
 brace-expansion@^1.1.7:
   version "1.1.11"
   resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-1.1.11.tgz#3c7fcbf529d87226f3d2f52b966ff5271eb441dd"