feat [front]: misc mobile improvement

front/pages/a-propos.vue

@@ -41,7 +41,7 @@
     </section>
     <section class="section">
       <h2 class="title">Partenaires</h2>
-      <ul class="is-flex is-align-items-center partners">
+      <ul class="is-flex is-flex-wrap-wrap is-align-items-center partners">
         <li><a class="cof" href="https://cof.ens.fr/">COF</a></li>
         <li>
           <a href="https://www.ens.psl.eu/">
@@ -70,6 +70,9 @@
 
 .partners
   list-style: none
+  margin-top: -1.5rem
+  > *
+    margin-top: 1.5rem
   > :not(:first-child)
     margin-left: 1.5rem
   img

front/pages/infos-pratiques.vue

@@ -104,7 +104,10 @@ const transports = [
 <style scoped lang="sass">
 .card-container
   justify-content: space-evenly
+  flex-wrap: wrap
+  margin-top: -1.5rem
 
   .card
     flex-basis: 400px
+    margin-top: 1.5rem
 </style>