re meta#300 tweaket bøyningsknapp (sentrering, padding)

src/components/Header.vue

@@ -110,6 +110,7 @@ article (table, th, td) {
 
 summary {
   width: 30em;
+  text-align: center;
 }
 
 article h2 {
@@ -142,7 +143,9 @@ details > summary {
   list-style: none;
   border: solid 2px var(--v-primary-base);
   border-radius: 30px;
-  padding: 6px;
+  padding-top: 6px;
+  padding-bottom: 6px;
+  padding-right: 10px;
   color: var(--v-primary-base);
   background-color: #ffffff;
   cursor: pointer;