diff --git a/docs/catalog/blocks/mk-background.mdx b/docs/catalog/blocks/mk-background.mdx
new file mode 100644
index 0000000000..1eef00c071
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+++ b/docs/catalog/blocks/mk-background.mdx
@@ -0,0 +1,44 @@
+---
+title: "Keynote Background"
+description: "Apple-keynote-style procedural gradient backdrop: two soft radial blobs drifting over a base color, with an animatable rounded-card bar mask and optional frosted-glass mode"
+---
+
+# Keynote Background
+
+Apple-keynote-style procedural gradient backdrop: two soft radial blobs drifting over a base color, with an animatable rounded-card bar mask and optional frosted-glass mode
+
+`background` `gradient` `minimal` `professional` `keynote`
+
+<video className="w-full aspect-video rounded-xl object-cover bg-zinc-100 dark:bg-zinc-800" src="https://static.heygen.ai/hyperframes-oss/docs/images/catalog/blocks/mk-background.mp4" poster="https://static.heygen.ai/hyperframes-oss/docs/images/catalog/blocks/mk-background.png" autoPlay muted loop playsInline />
+
+## Install
+
+<CodeGroup>
+
+```bash Terminal
+npx hyperframes add mk-background
+```
+
+</CodeGroup>
+
+## Details
+
+| Property | Value |
+| --- | --- |
+| Type | Block |
+| Dimensions | 1920×1080 |
+| Duration | 10s |
+
+## Files
+
+| File | Target | Type |
+| --- | --- | --- |
+| `mk-background.html` | `compositions/mk-background.html` | hyperframes:composition |
+
+## Usage
+
+After installing, add the block to your host composition:
+
+```html
+<div data-composition-id="mk-background" data-composition-src="compositions/mk-background.html" data-start="0" data-duration="10" data-track-index="1" data-width="1920" data-height="1080"></div>
+```
diff --git a/registry/blocks/mk-background/mk-background.html b/registry/blocks/mk-background/mk-background.html
new file mode 100644
index 0000000000..9b35990601
--- /dev/null
+++ b/registry/blocks/mk-background/mk-background.html
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+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
+    <style>
+      *,
+      *::before,
+      *::after {
+        margin: 0;
+        padding: 0;
+        box-sizing: border-box;
+      }
+      body {
+        background: transparent;
+        overflow: hidden;
+      }
+      #mk-bg-root {
+        /* ---- mk tokens: override these in the host to re-skin the family ---- */
+        --mk-font: "Inter", -apple-system, sans-serif;
+        --mk-stage: #f5f5f7;
+        --mk-base: #ffffff;
+        --mk-blob-1: #ff7ac8;
+        --mk-blob-2: #45d6c8;
+        --mk-stage-dark: #000000;
+        --mk-base-dark: #0a0a0c;
+        --mk-blob-1-dark: #7d5cff;
+        --mk-blob-2-dark: #2d1b69;
+        --mk-radius-card: 40px;
+        --mk-shadow: 0 30px 80px rgba(0, 0, 0, 0.18);
+
+        position: relative;
+        width: 1920px;
+        height: 1080px;
+        overflow: hidden;
+        background: var(--mk-stage);
+      }
+      #mk-bg-root.mk-dark {
+        background: var(--mk-stage-dark);
+      }
+      /* The "Bar" — mKeynote's rounded-rect mask. Full-bleed by default,
+         animatable down to a floating card over the stage. */
+      #mk-bg-card {
+        position: absolute;
+        top: 0;
+        left: 0;
+        width: 1920px;
+        height: 1080px;
+        overflow: hidden;
+        border-radius: 0;
+        background: var(--mk-base);
+        box-shadow: var(--mk-shadow);
+      }
+      .mk-dark #mk-bg-card {
+        background: var(--mk-base-dark);
+      }
+      /* Soft radial blobs — the procedural "mesh gradient". Two oversized
+         radial gradients with a long falloff, drifting slowly. */
+      .mk-bg-blob {
+        position: absolute;
+        border-radius: 50%;
+        will-change: transform;
+      }
+      #mk-bg-blob1 {
+        background: radial-gradient(
+          circle closest-side,
+          var(--mk-blob-1) 0%,
+          rgba(255, 255, 255, 0) 72%
+        );
+      }
+      #mk-bg-blob2 {
+        background: radial-gradient(
+          circle closest-side,
+          var(--mk-blob-2) 0%,
+          rgba(255, 255, 255, 0) 72%
+        );
+      }
+      .mk-dark #mk-bg-blob1 {
+        background: radial-gradient(
+          circle closest-side,
+          var(--mk-blob-1-dark) 0%,
+          rgba(0, 0, 0, 0) 72%
+        );
+      }
+      .mk-dark #mk-bg-blob2 {
+        background: radial-gradient(
+          circle closest-side,
+          var(--mk-blob-2-dark) 0%,
+          rgba(0, 0, 0, 0) 72%
+        );
+      }
+    </style>
+  </head>
+  <body>
+    <div
+      id="mk-bg-root"
+      data-composition-id="mk-background"
+      data-start="0"
+      data-duration="10"
+      data-width="1920"
+      data-height="1080"
+    >
+      <div id="mk-bg-card">
+        <div id="mk-bg-blob1" class="mk-bg-blob" data-layout-allow-overflow></div>
+        <div id="mk-bg-blob2" class="mk-bg-blob" data-layout-allow-overflow></div>
+      </div>
+      <div
+        id="mk-bg-drv"
+        class="clip"
+        data-start="0"
+        data-duration="10"
+        data-track-index="0"
+        style="position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none"
+      ></div>
+    </div>
+    <script>
+      (function () {
+        window.__timelines = window.__timelines || {};
+
+        /* ---- published parameters (mKeynote-style CONFIG) ---- */
+        var CONFIG = {
+          scheme: "light", // "light" | "dark"
+          animationIn: true, // fade/settle entrance
+          animationOut: true, // fade exit
+          drift: true, // ambient blob motion
+          // Soft BG blobs: center as fraction of canvas, radius in px
+          blob1: { x: 0.28, y: 0.32, r: 950, opacity: 0.85 },
+          blob2: { x: 0.74, y: 0.66, r: 1100, opacity: 0.8 },
+          // Bar mask (rounded-rect card). demo:true plays full-bleed -> card -> full-bleed
+          bar: {
+            demo: true, // full-bleed -> rounded card -> full-bleed showcase
+            x: 240,
+            y: 140,
+            width: 1440,
+            height: 800,
+            roundness: 40,
+          },
+          // Content opacity + frost only matter with footage beneath the block
+          contentOpacity: 1,
+          frostBlur: 0, // px; e.g. 24 for the frosted-card look over footage
+        };
+
+        var W = 1920,
+          H = 1080,
+          DUR = 10;
+
+        var root = document.getElementById("mk-bg-root");
+        var card = document.getElementById("mk-bg-card");
+        var blob1 = document.getElementById("mk-bg-blob1");
+        var blob2 = document.getElementById("mk-bg-blob2");
+
+        if (CONFIG.scheme === "dark") root.classList.add("mk-dark");
+
+        function placeBlob(el, b) {
+          var d = b.r * 2;
+          el.style.width = d + "px";
+          el.style.height = d + "px";
+          el.style.left = b.x * W - b.r + "px";
+          el.style.top = b.y * H - b.r + "px";
+          el.style.opacity = String(b.opacity);
+        }
+        placeBlob(blob1, CONFIG.blob1);
+        placeBlob(blob2, CONFIG.blob2);
+
+        card.style.opacity = String(CONFIG.contentOpacity);
+        if (CONFIG.frostBlur > 0) {
+          card.style.backdropFilter = "blur(" + CONFIG.frostBlur + "px) saturate(1.4)";
+        }
+
+        var tl = gsap.timeline({ paused: true });
+
+        /* entrance — fade + blobs settle (power3, no bounce) */
+        if (CONFIG.animationIn) {
+          tl.from(root, { opacity: 0, duration: 0.7, ease: "power2.out" }, 0);
+          tl.from([blob1, blob2], { scale: 1.14, duration: 1.2, ease: "power3.out" }, 0);
+        }
+
+        /* ambient drift — slow sine yoyo, seek-safe timeline tweens */
+        if (CONFIG.drift) {
+          tl.to(
+            blob1,
+            { x: 70, y: 42, duration: 2.35, ease: "sine.inOut", yoyo: true, repeat: 3 },
+            0.3,
+          );
+          tl.to(
+            blob2,
+            { x: -84, y: -36, duration: 2.35, ease: "sine.inOut", yoyo: true, repeat: 3 },
+            0.3,
+          );
+        }
+
+        /* bar-mask demo: full-bleed -> rounded card over the stage -> full-bleed */
+        if (CONFIG.bar.demo) {
+          tl.to(
+            card,
+            {
+              top: CONFIG.bar.y,
+              left: CONFIG.bar.x,
+              width: CONFIG.bar.width,
+              height: CONFIG.bar.height,
+              borderRadius: CONFIG.bar.roundness,
+              duration: 1.1,
+              ease: "power3.inOut",
+            },
+            3.8,
+          );
+          tl.to(
+            card,
+            {
+              top: 0,
+              left: 0,
+              width: W,
+              height: H,
+              borderRadius: 0,
+              duration: 1.0,
+              ease: "power3.inOut",
+            },
+            7.6,
+          );
+        }
+
+        /* exit + hard kill */
+        if (CONFIG.animationOut) {
+          tl.to(root, { opacity: 0, duration: 0.4, ease: "power2.in" }, DUR - 0.45);
+        }
+        tl.set(root, { visibility: "hidden" }, DUR - 0.02);
+
+        window.__timelines["mk-background"] = tl;
+      })();
+    </script>
+  </body>
+</html>
diff --git a/registry/blocks/mk-background/registry-item.json b/registry/blocks/mk-background/registry-item.json
new file mode 100644
index 0000000000..659ddb012a
--- /dev/null
+++ b/registry/blocks/mk-background/registry-item.json
@@ -0,0 +1,20 @@
+{
+  "$schema": "https://hyperframes.heygen.com/schema/registry-item.json",
+  "name": "mk-background",
+  "type": "hyperframes:block",
+  "title": "Keynote Background",
+  "description": "Apple-keynote-style procedural gradient backdrop: two soft radial blobs drifting over a base color, with an animatable rounded-card bar mask and optional frosted-glass mode",
+  "tags": ["background", "gradient", "minimal", "professional", "keynote"],
+  "dimensions": {
+    "width": 1920,
+    "height": 1080
+  },
+  "duration": 10,
+  "files": [
+    {
+      "path": "mk-background.html",
+      "target": "compositions/mk-background.html",
+      "type": "hyperframes:composition"
+    }
+  ]
+}
diff --git a/registry/registry.json b/registry/registry.json
index 5513973ee9..ed5fa5a4a2 100644
--- a/registry/registry.json
+++ b/registry/registry.json
@@ -563,6 +563,10 @@
       "name": "vfx-liquid-glass",
       "type": "hyperframes:block"
     },
+    {
+      "name": "mk-background",
+      "type": "hyperframes:block"
+    },
     {
       "name": "parallax-zoom",
       "type": "hyperframes:component"
