Port and re-write icon code.

src/styles/_page.scss

@@ -8,7 +8,7 @@
 }
 
 html {
-    contain: content;
+    // contain: content;
     background: var(--background);
     background-size: cover !important;
     background-repeat: no-repeat !important;
@@ -16,6 +16,8 @@ html {
 
 html,
 body {
+    margin: 0;
+    height: 100%;
     font-family: "Open Sans", sans-serif;
     -webkit-font-smoothing: antialiased;
     -moz-osx-font-smoothing: grayscale;
@@ -29,3 +31,11 @@ body {
 
     scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
 }
+
+#app {
+    position: fixed;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+}