diff --git a/src/components/PageHeader/ItemPage.astro b/src/components/PageHeader/ItemPage.astro
index 6213d90494..96c8481678 100644
--- a/src/components/PageHeader/ItemPage.astro
+++ b/src/components/PageHeader/ItemPage.astro
@@ -19,7 +19,7 @@ if (titleAuthor) {
 }
 ---
 
-<div class="px-5 md:px-lg pt-5xl lg:pt-3xl pb-sm">
+<div class="px-5 md:px-lg pt-[11.25rem] lg:pt-3xl pb-sm">
   <div class="pb-xs flex flex-nowrap gap-2.5">
     <a href={topic.url}>{topic.name}</a>
     <span class="grid place-items-center"
diff --git a/src/components/ReferenceDirectoryWithFilter/index.tsx b/src/components/ReferenceDirectoryWithFilter/index.tsx
index c510ec7807..3cf5295e09 100644
--- a/src/components/ReferenceDirectoryWithFilter/index.tsx
+++ b/src/components/ReferenceDirectoryWithFilter/index.tsx
@@ -1,3 +1,4 @@
+import { useMemo, useState } from "preact/hooks";
 import type { ReferenceDocContentItem } from "@/src/content/types";
 import flask from "@src/content/ui/images/icons/flask.svg?raw";
 import warning from "@src/content/ui/images/icons/warning.svg?raw";
@@ -10,17 +11,24 @@ type ReferenceDirectoryEntry = ReferenceDocContentItem & {
   };
 };
 
+type ReferenceDirectorySubcategory = {
+  name: string;
+  entry?: ReferenceDirectoryEntry;
+  entries: ReferenceDirectoryEntry[];
+};
+
+type ReferenceDirectoryCategory = {
+  name: string;
+  subcats: ReferenceDirectorySubcategory[];
+};
+
 type ReferenceDirectoryProps = {
-  categoryData: {
-    name: string;
-    subcats: {
-      name: string;
-      entry?: ReferenceDirectoryEntry;
-      entries: ReferenceDirectoryEntry[];
-    }[];
-  }[];
+  categoryData: ReferenceDirectoryCategory[];
 };
 
+const normalizeSearchText = (value: string): string =>
+  value.replace(/<[^>]*>/g, " ").replace(/\s+/g, " ").trim().toLowerCase();
+
 /**
  * Convert Reference description to one-line description
  * @param description String description
@@ -51,6 +59,34 @@ const getOneLineDescription = (description: string): string => {
 export const ReferenceDirectoryWithFilter = ({
   categoryData,
 }: ReferenceDirectoryProps) => {
+  const [searchTerm, setSearchTerm] = useState("");
+
+  const filteredCategoryData = useMemo<ReferenceDirectoryCategory[]>(() => {
+    const normalizedQuery = normalizeSearchText(searchTerm);
+
+    if (!normalizedQuery) {
+      return categoryData;
+    }
+
+    return categoryData
+      .map((category) => ({
+        ...category,
+        subcats: category.subcats
+          .map((subcat) => ({
+            ...subcat,
+            entries: subcat.entries.filter((entry) => {
+              const searchableText = `${entry.data.title} ${entry.data.description}`;
+
+              return normalizeSearchText(searchableText).includes(
+                normalizedQuery,
+              );
+            }),
+          }))
+          .filter((subcat) => subcat.entries.length > 0),
+      }))
+      .filter((category) => category.subcats.length > 0);
+  }, [categoryData, searchTerm]);
+
   const renderEntries = (entries: ReferenceDirectoryEntry[]) =>
     entries.length === 0 ? null : (
       <div class="content-grid">
@@ -95,8 +131,8 @@ export const ReferenceDirectoryWithFilter = ({
   };
 
   const getSubcatHeading = (
-    subcat: { name: string; entry?: any },
-    category: { name: string },
+    subcat: ReferenceDirectorySubcategory,
+    category: ReferenceDirectoryCategory,
   ) => {
     if (!subcatShouldHaveHeading(subcat, category)) {
       return null;
@@ -121,7 +157,15 @@ export const ReferenceDirectoryWithFilter = ({
   };
 
   const renderCategoryData = () => {
-    return categoryData.map((category) => (
+    if (filteredCategoryData.length === 0) {
+      return (
+        <p class="text-body-large mt-[var(--gutter-lg)]">
+          No matching references found.
+        </p>
+      );
+    }
+
+    return filteredCategoryData.map((category) => (
       <section key={category.name}>
         <h2
           class={
@@ -145,6 +189,22 @@ export const ReferenceDirectoryWithFilter = ({
 
   return (
     <div class="-top-[75px] mx-5 min-h-[50vh] md:mx-lg">
+      <div class="mb-[var(--gutter-lg)] max-w-[32rem]">
+        <label class="sr-only" for="reference-directory-filter">
+          Search references
+        </label>
+        <input
+          id="reference-directory-filter"
+          type="search"
+          value={searchTerm}
+          onInput={(event) => {
+            setSearchTerm(event.currentTarget.value);
+          }}
+          placeholder="Search references"
+          aria-label="Search references"
+          class="w-full rounded-[20px] border border-sidebar-type-color bg-body-color px-md py-3 text-body-large placeholder-sidebar-type-color focus:outline-0"
+        />
+      </div>
       {renderCategoryData()}
     </div>
   );
diff --git a/src/components/SearchForm/index.astro b/src/components/SearchForm/index.astro
index 36107a1944..6c5629c5cb 100644
--- a/src/components/SearchForm/index.astro
+++ b/src/components/SearchForm/index.astro
@@ -20,7 +20,7 @@ const t = await getUiTranslator(currentLocale);
     type="search"
     placeholder={t("Search") as string}
     name="term"
-   class="border-accent-type-color border outline-offset-0 placeholder-accent-type-color bg-transparent pl-gutter-md py-[6px] md:py-[4px] lg:py-[8px] h-full w-full rounded-[20px] peer text-base"
+  class="border-accent-type-color border outline-offset-0 placeholder-accent-type-color bg-transparent pl-gutter-md py-[6px] md:py-[4px] lg:py-[8px] h-full w-full rounded-[20px] peer text-3xl"
     aria-label="Search through site content"
     required
   />
diff --git a/src/layouts/ReferenceLayout.astro b/src/layouts/ReferenceLayout.astro
index 021d338f01..ca9e945aca 100644
--- a/src/layouts/ReferenceLayout.astro
+++ b/src/layouts/ReferenceLayout.astro
@@ -153,6 +153,7 @@ const pageJumpToState: JumpToState = {
 
 <BaseLayout title={Astro.props.title} mainContentParentClass="mx-0" jumpToState={pageJumpToState}>
   <ReferenceDirectoryWithFilter
+    client:load
     categoryData={categoryData as any}
   />
 </BaseLayout>
diff --git a/test/components/ReferenceDirectoryWithFilter.test.tsx b/test/components/ReferenceDirectoryWithFilter.test.tsx
new file mode 100644
index 0000000000..ddbfc4c1eb
--- /dev/null
+++ b/test/components/ReferenceDirectoryWithFilter.test.tsx
@@ -0,0 +1,109 @@
+import { cleanup, fireEvent, render, screen } from "@testing-library/preact";
+import { expect, it, suite } from "vitest";
+import { ReferenceDirectoryWithFilter } from "@components/ReferenceDirectoryWithFilter";
+
+suite("ReferenceDirectoryWithFilter", () => {
+  it("filters by title and description, case-insensitively", () => {
+    render(
+      <ReferenceDirectoryWithFilter
+        categoryData={[
+          {
+            name: "p5.MediaElement",
+            subcats: [
+              {
+                name: "video",
+                entries: [
+                  {
+                    id: "1",
+                    slug: "createVideo",
+                    body: "",
+                    collection: "reference",
+                    data: {
+                      module: "Shape",
+                      submodule: "video",
+                      file: "createVideo.mdx",
+                      line: 1,
+                      deprecated: "",
+                      params: [],
+                      path: "p5/createVideo",
+                      title: "createVideo()",
+                      description: "<p>Loads and plays a video element.</p>",
+                    },
+                  },
+                ],
+              },
+              {
+                name: "audio",
+                entries: [
+                  {
+                    id: "2",
+                    slug: "volume",
+                    body: "",
+                    collection: "reference",
+                    data: {
+                      module: "Shape",
+                      submodule: "audio",
+                      file: "volume.mdx",
+                      line: 1,
+                      deprecated: "",
+                      params: [],
+                      path: "p5/volume",
+                      title: "volume()",
+                      description: "<p>Controls the media volume for video playback.</p>",
+                    },
+                  },
+                ],
+              },
+            ],
+          },
+          {
+            name: "p5.Graphics",
+            subcats: [
+              {
+                name: "misc",
+                entries: [
+                  {
+                    id: "3",
+                    slug: "alpha",
+                    body: "",
+                    collection: "reference",
+                    data: {
+                      module: "Shape",
+                      submodule: "misc",
+                      file: "alpha.mdx",
+                      line: 1,
+                      deprecated: "",
+                      params: [],
+                      path: "p5/alpha",
+                      title: "alpha()",
+                      description: "<p>No matching term here.</p>",
+                    },
+                  },
+                ],
+              },
+            ],
+          },
+        ]}
+      />,
+    );
+
+    const searchInput = screen.getByLabelText("Search references");
+
+    expect(screen.getByText("p5.MediaElement")).toBeTruthy();
+    expect(screen.getByText("p5.Graphics")).toBeTruthy();
+    expect(screen.getByText("video")).toBeTruthy();
+    expect(screen.getByText("audio")).toBeTruthy();
+
+    fireEvent.input(searchInput, { target: { value: "VIDEO" } });
+
+    expect(screen.getByText("p5.MediaElement")).toBeTruthy();
+    expect(screen.queryByText("p5.Graphics")).toBeNull();
+    expect(screen.getByText("video")).toBeTruthy();
+    expect(screen.getByText("audio")).toBeTruthy();
+    expect(screen.getByText("createVideo()")).toBeTruthy();
+    expect(screen.getByText("volume()")).toBeTruthy();
+    expect(screen.queryByText("alpha()")).toBeNull();
+
+    cleanup();
+  });
+});
\ No newline at end of file