fix: stijl consistent leerpaden

frontend/src/components/LearningPathSearchField.vue

@@ -31,4 +31,9 @@
     ></v-text-field>
 </template>
 
-<style scoped></style>
+<style scoped>
+    .search-field {
+        width: 25%;
+        min-width: 300px;
+    }
+</style>

frontend/src/components/LearningPathsGrid.vue

@@ -53,9 +53,9 @@
         white-space: normal;
     }
     .results-grid {
-        margin: 20px;
+        margin: 20px auto;
         display: flex;
-        align-items: stretch;
+        justify-content: center;
         gap: 20px;
         flex-wrap: wrap;
     }