Changed all static inline style to CSS classes

src/components/CreateRoom.vue

@@ -77,7 +77,7 @@
       </v-row>
     </v-container>
 
-    <v-container fluid style="margin-top: 40px">
+    <v-container fluid class="mt-40">
       <v-row align="center">
         <v-col align="center">
           <v-avatar size="50" color="#ededed" @click.stop="showAvatarPicker">
@@ -210,7 +210,7 @@
       name="avatar"
       @change="handlePickedAvatar($event)"
       accept="image/*"
-      style="display: none"
+      class="d-none"
     />
   </div>
 </template>