[add] css for survey

static/src/css/3adentaire_frontend.css

@@ -82,3 +82,18 @@ a:hover {
 .availability_messages .text-danger span {
     display: none;
 }
+
+/******************************
+/** SURVEY
+/******************************/
+h1[data-oe-model="survey.page"] {
+    margin-top: 30px;
+}
+.js_question-wrapper {
+    margin-top: 30px;
+    margin-bottom: 45px;
+}
+.js_question-wrapper h2 {
+    margin-bottom: 20px;
+    font-size: 1.5rem;
+}