404 page now has button to navigate to previous page.

src/components/404.vue

@@ -1,38 +1,74 @@
 <template>
+  <div>
     <section class="not-found">
       <h1 class="not-found__title">Page Not Found</h1>
     </section>
+    <seasoned-button class="button" @click="goBack">go back to previous page</seasoned-button>
+  </div>
 </template>
 
+<script>
+import store from '@/store'
+import SeasonedButton from '@/components/ui/SeasonedButton'
+
+export default {
+  components: { SeasonedButton },
+  methods: {
+    goBack() {
+      this.$router.go(-1)
+    }
+  },
+  created() {
+    if (this.$popup.isOpen == true)
+      this.$popup.close()
+  }
+}
+</script>
+
 <style lang="scss" scoped>
 @import "./src/scss/variables";
 @import "./src/scss/media-queries";
 
+.button {
+  font-size: 1.2rem;
+  position: fixed;
+  top: 50%;
+  left: calc(50% + 46px);
+  transform: translate(-50%, -50%);
+
+  @include mobile {
+    top: 60%;
+    left: 50%;
+    font-size: 1rem;
+    width: content;
+  }
+}
+
 .not-found {
   display: flex;
   height: calc(100vh - var(--header-size));
-  width: 100%;
   background: url('~assets/pulp-fiction.jpg') no-repeat 50% 50%;
   background-size: cover;
-  justify-content: center;
+  align-items: center;
+  flex-direction: column;
 
-  &:before {
+  &::before {
     content: "";
     position: absolute;
     height: calc(100vh - var(--header-size));
     width: 100%;
+    pointer-events: none;
     background: $background-40;
   }
   &__title {
-   padding-top: 40vh;
-    font-size: 2rem;
+    margin-top: 30vh;
+    font-size: 2.5rem;
     font-weight: 500;
     color: $text-color;
     position: relative;
-    margin: 0;
 
     @include tablet-min {
-      font-size: 2.3rem;
+      font-size: 3.5rem;
     }
   }
 }