feat: change styles of pages views to version 3

src/views/pages/Page404.vue

@@ -1,15 +1,15 @@
 <template>
-  <div class="app flex-row align-items-center">
-    <div class="container">
-      <CRow class="justify-content-center">
+  <div class="app c-flex-row c-align-items-center">
+    <CContainer>
+      <CRow class="c-justify-content-center">
         <CCol md="6">
-          <div class="clearfix">
-            <h1 class="float-left display-3 mr-4">404</h1>
-            <h4 class="pt-3">Oops! You're lost.</h4>
-            <p class="text-muted">The page you are looking for was not found.</p>
+          <div class="c-clearfix">
+            <h1 class="c-float-left c-display-3 c-mr-4">404</h1>
+            <h4 class="c-pt-3">Oops! You're lost.</h4>
+            <p class="c-text-muted">The page you are looking for was not found.</p>
           </div>
           <CFormInput
-            class="mb-0"
+            class="c-mb-0"
             prepend="<i class='fa fa-search'></i>"
             placeholder="What are you looking for?"
           >
@@ -19,7 +19,7 @@
           </CFormInput>
         </CCol>
       </CRow>
-    </div>
+    </CContainer>
   </div>
 </template>