Replace obsolete normalize with a lightweight reset.

assets/sass/reset/document/_document.scss

@@ -0,0 +1,35 @@
+// stylelint-disable property-no-vendor-prefix
+
+
+// Document
+
+html {
+  // Change the default font family in all browsers (opinionated).
+  @include typeface(body);
+  // Correct the line height in all browsers.
+  @include define-type-sizing();
+  // Prevent adjustments of font size.
+  -webkit-text-size-adjust: none;
+  text-size-adjust: none;
+  // On short pages, we want any background gradients to fill the entire height
+  // of the browser.
+  min-height: 100%;
+  // Use the saner border-box model.
+  box-sizing: border-box;
+  // Use smooth scrolling.
+  scroll-behavior: smooth;
+  // Improve text rendering.
+  -webkit-font-smoothing: antialiased;
+
+  @include respond-to(xxl) {
+    @include define-type-sizing($base-font-size-2, $base-line-height-2);
+  }
+}
+
+
+// Use the saner border-box model for all elements.
+*,
+*::before,
+*::after {
+  box-sizing: inherit;
+}