fix(home): buttons hover visibility since dsfr

app/assets/stylesheets/landing.scss

@@ -162,7 +162,7 @@ $landing-breakpoint: 1040px;
 .usagers-panel,
 .numbers-panel,
 .cta-panel-2 {
-  background-color: $light-grey;
+  background-color: $alt-blue-france;
 }
 
 .more-info {
@@ -252,6 +252,10 @@ $users-breakpoint: 950px;
 .cta-panel {
   background-color: $blue-france-500;
   color: #FFFFFF;
+
+  .fr-btn {
+    box-shadow: inset 0 0 0 1px var(--text-inverted-blue-france);
+  }
 }
 
 .role-panel-wrapper,

app/views/root/landing.html.haml

@@ -30,11 +30,11 @@
             COMMENT_TROUVER_MA_DEMARCHE_URL,
             target: "_blank",
             rel: "noopener noreferrer",
-            class: "role-panel-button-primary"
+            class: "fr-btn fr-btn--lg fr-mr-1w fr-mb-2w"
 
           = link_to "Se connecter",
             new_user_session_path,
-            class: "role-panel-button-secondary"
+            class: "fr-btn fr-btn--secondary fr-btn--lg"
 
   - cache "numbers-panel", :expires_in => 3.hours do
     .landing-panel
@@ -71,7 +71,7 @@
           %p.cta-panel-explanation La réponse est dans l’aide en ligne
         %div
           = link_to "Accéder à l’aide en ligne", FAQ_URL,
-            class: "cta-panel-button-white",
+            class: "fr-btn fr-btn--lg",
             target: "_blank",
             rel: "noopener noreferrer"
         -#   We temporarily disable the link to the contact page on the homepage
@@ -92,4 +92,4 @@
         %div
           = link_to "Découvrez notre outil",
             administration_path,
-            class: "cta-panel-button-blue"
+            class: "fr-btn fr-btn--lg"