refactor: addressing review comments.

src/.vuepress/components/ScrollTo.vue

@@ -5,7 +5,7 @@
     id="scroll"
   >
     <button class="scroll-button" @click="scrollToTop">
-      <v-icon large class="black--text">mdi-arrow-up</v-icon>
+      <v-icon medium class="white--text">mdi-arrow-up</v-icon>
     </button>
   </div>
 </template>
@@ -61,5 +61,14 @@ export default {
   height: 50px;
   justify-content: center;
   width: 50px;
+  background: #1a3771;
+  border-radius: 25px;
+  box-shadow:
+  0 2.8px 2.2px rgba(0, 0, 0, 0.034),
+  0 6.7px 5.3px rgba(0, 0, 0, 0.048),
+  0 12.5px 10px rgba(0, 0, 0, 0.06),
+  0 22.3px 17.9px rgba(0, 0, 0, 0.072),
+  0 41.8px 33.4px rgba(0, 0, 0, 0.086),
+  0 100px 80px rgba(0, 0, 0, 0.12);
 }
 </style>