move styles and js to the root directory

styles/components/_global_layout.scss

@@ -0,0 +1,36 @@
+body {
+  background-color: $color-gray-lightest;
+  display: flex;
+  flex-direction: column;
+  justify-content: flex-start;
+  min-height: 100vh;
+
+  > footer {
+    margin-top: auto;
+  }
+
+  &.modalOpen {
+    overflow-y: hidden;
+  }
+}
+
+.global-layout {
+  display: flex;
+  flex-wrap: nowrap;
+  flex-grow: 1;
+
+  .global-navigation {
+    margin-top: -1px;
+  }
+
+  .global-panel-container {
+    margin: $gap;
+    max-width: $site-max-width;
+    overflow-x: hidden;
+    flex-grow: 1;
+
+    @include media($medium-screen) {
+      margin: $gap * 2;
+    }
+  }
+}