feat: Center buttons

src/components/Question.vue

@@ -102,6 +102,7 @@ const d = ref(0);
       </template>
     </div>
   </div>
+  <div class="btns">
     <template v-if="question.function == 'rapport_hd'">
       <button class="btn calculette" @click="showHidePopup">
         <img src="/abacus.svg" alt="" />
@@ -144,9 +145,17 @@ const d = ref(0);
         ></path>
       </svg>
     </button>
+  </div>
 </template>
 
 <style lang="sass">
+.btns
+  width: 400px
+  max-width: 100%
+  min-width: 280px
+  position: relative
+  margin: 0 auto
+
 .popup
   position: absolute
   background: var(--color-highlight-background)