diff --git a/apps/marketing/src/pages/index.astro b/apps/marketing/src/pages/index.astro
index ea8f4fc337660b2c982c1e2f352ffed3ea1f810a..2ccef66cd10d729013fcb34be4bacafaffebb349 100644
--- a/apps/marketing/src/pages/index.astro
+++ b/apps/marketing/src/pages/index.astro
@@ -39,12 +39,14 @@
         <h1 class="tagline">T3 Code is the best way to code with AI.</h1>
 
         <a
+          id="download-btn"
           href="https://github.com/pingdotgg/t3code/releases"
-          target="_blank"
-          rel="noopener noreferrer"
           class="hero-button"
         >
-          Download now
+          <svg class="hero-button-icon hero-button-icon--apple" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 814 1000" aria-hidden="true"><path fill="currentColor" d="M788.1 340.9c-5.8 4.5-108.2 62.2-108.2 190.5 0 148.4 130.3 200.9 134.2 202.2-.6 3.2-20.7 71.9-68.7 141.9-42.8 61.6-87.5 123.1-155.5 123.1s-85.5-39.5-164-39.5c-76.5 0-103.7 40.8-165.9 40.8s-105.6-57-155.5-127C46.7 790.7 0 663 0 541.8c0-194.4 126.4-297.5 250.8-297.5 66.1 0 121.2 43.4 162.7 43.4 39.5 0 101.1-46 176.3-46 28.5 0 130.9 2.6 198.3 99.2zm-234-181.5c31.1-36.9 53.1-88.1 53.1-139.3 0-7.1-.6-14.3-1.9-20.1-50.6 1.9-110.8 33.7-147.1 75.8-28.5 32.4-55.1 83.6-55.1 135.5 0 7.8 1.3 15.6 1.9 18.1 3.2.6 8.4 1.3 13.6 1.3 45.4 0 102.5-30.4 135.5-71.3z"/></svg>
+          <svg class="hero-button-icon hero-button-icon--windows" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 88 88" aria-hidden="true"><path fill="currentColor" d="m0 12.402 35.687-4.86.016 34.423-35.67.203zm35.67 33.529.028 34.453L.028 75.48.026 45.7zm4.326-39.025L87.314 0v41.527l-47.318.376zm47.329 39.349-.011 41.34-47.318-6.678-.066-34.739z"/></svg>
+          <svg class="hero-button-icon hero-button-icon--linux" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 295" aria-hidden="true"><defs><linearGradient id="lt0" x1="48.548%" x2="51.047%" y1="115.276%" y2="41.364%"><stop offset="0%" stop-color="#FFEED7"/><stop offset="100%" stop-color="#BDBFC2"/></linearGradient><linearGradient id="lt6" x1="49.984%" x2="49.984%" y1="89.845%" y2="40.632%"><stop offset="0%" stop-color="#FFEED7"/><stop offset="100%" stop-color="#BDBFC2"/></linearGradient><linearGradient id="lt8" x1="49.841%" x2="50.241%" y1="13.229%" y2="94.673%"><stop offset="0%" stop-color="#FFF" stop-opacity=".8"/><stop offset="100%" stop-color="#FFF" stop-opacity="0"/></linearGradient><linearGradient id="ltc" x1="53.467%" x2="38.949%" y1="48.921%" y2="98.1%"><stop offset="0%" stop-color="#FFA63F"/><stop offset="100%" stop-color="#FF0"/></linearGradient><linearGradient id="lte" x1="30.581%" x2="65.887%" y1="34.024%" y2="89.175%"><stop offset="0%" stop-color="#FFA63F"/><stop offset="100%" stop-color="#FF0"/></linearGradient><linearGradient id="lti" x1="49.733%" x2="50.558%" y1="17.609%" y2="99.385%"><stop offset="0%" stop-color="#FFA63F"/><stop offset="100%" stop-color="#FF0"/></linearGradient></defs><g fill="none"><path fill="#000" d="M63.213 215.474c-11.387-16.346-13.591-69.606 12.947-102.39C89.292 97.383 92.69 86.455 93.7 71.67c.734-16.805-11.846-66.851 35.537-70.616 48.027-3.857 45.364 43.526 45.088 68.596-.183 21.12 15.52 33.15 26.355 49.68 19.927 30.303 18.274 82.461-3.765 110.745-27.916 35.354-51.791 20.018-67.678 21.304-29.752 1.745-30.762 17.54-66.024-35.905"/><path fill="url(#lt6)" d="M81.027 145.684c6.52-14.785 20.386-40.772 20.662-60.883 0-15.978 47.843-19.835 51.7-3.856 3.856 15.978 13.59 39.853 19.834 51.424 6.245 11.478 24.335 48.118 5.051 80.074-17.356 28.284-69.973 50.69-98.073-3.856-9.55-18.917-7.806-42.333.826-62.903"/><path fill="url(#lt8)" d="M166.428 151.285c0 16.162-15.519 37.1-42.15 36.916-27.456.183-39.118-20.754-39.118-36.916 0-16.161 18.182-29.293 40.588-29.293 22.498.092 40.68 13.132 40.68 29.293"/><path fill="#000" stroke="#000" stroke-width=".977" d="M176.805 117.86c13.59 11.02 38.292 49.587 2.204 74.748-11.846 7.806 10.468 32.508 23.049 19.927 43.618-43.894-1.102-94.308-16.53-111.664-13.774-15.151-25.987 3.49-8.723 16.989z"/><path fill="#000" stroke="#000" stroke-width="1.25" d="M79.925 122.727c-8.907 14.509-30.211 48.669-1.652 66.484 38.384 23.6 27.548 47.108-7.53 25.895-49.404-29.568-5.97-89.257 13.774-112.03 22.59-25.529 4.316 4.683-4.592 19.65z"/><path fill="url(#ltc)" stroke="#E68C3F" stroke-width="6.25" d="M51.835 258.542c-20.57-10.928-50.414 2.112-39.578-27.457 2.204-6.704-3.214-16.805.275-23.325 4.133-7.989 13.04-6.244 18.366-11.57 5.234-5.51 8.54-15.06 18.366-13.59 9.734 1.468 16.254 13.406 23.049 28.099 5.05 10.468 22.865 25.253 21.672 37.007-1.47 17.998-21.948 21.396-42.15 10.836z" transform="translate(10)"/><path fill="url(#lte)" stroke="#E68C3F" stroke-width="6.251" d="M194.445 253.49c15.06-18.273 48.578-14.508 25.988-39.577-4.775-5.418-3.306-16.989-9.183-21.947-6.887-6.061-14.509-1.102-21.488-4.224-6.979-3.398-14.325-9.918-22.865-5.327-8.54 4.684-9.459 16.805-10.285 32.783-.735 11.479-11.203 30.671-5.602 41.231 8.081 16.346 29.11 14.142 43.435-2.938z" transform="translate(10)"/><path fill="url(#lti)" stroke="#E68C3F" stroke-width="3.75" d="M97.107 66.344c3.673-3.398 12.58-13.774 29.477-2.939 3.122 2.02 5.693 2.204 11.662 4.775 12.03 4.96 6.336 16.897-6.52 20.937-5.51 1.745-10.468 8.449-20.386 7.806-8.54-.46-10.744-6.06-15.978-9.091-9.275-5.234-10.652-12.305-5.602-16.07 5.051-3.765 6.98-5.143 7.347-5.418z" transform="translate(10)"/><path fill="#000" d="M133.186 57.712c-.092 5.234 2.48 9.458 5.877 9.458 3.306 0 6.153-4.224 6.245-9.366.091-5.234-2.48-9.459-5.878-9.459-3.397 0-6.152 4.225-6.244 9.367m-21.212.092c.459 4.316-1.194 7.989-3.582 8.356-2.387.276-4.683-2.938-5.142-7.254-.46-4.316 1.194-7.99 3.581-8.357 2.388-.275 4.684 2.939 5.143 7.255"/></g></svg>
+          <span id="download-label">Download now</span>
         </a>
 
         <div class="screenshot-wrap">
@@ -64,6 +66,90 @@
   </body>
 </html>
 
+<script>
+  const REPO = "pingdotgg/t3code";
+  const RELEASES_URL = `https://github.com/${REPO}/releases`;
+  const API_URL = `https://api.github.com/repos/${REPO}/releases/latest`;
+
+  type Platform = { os: "mac" | "win" | "linux"; label: string; arch?: string };
+
+  function detectPlatform(): Platform | null {
+    const ua = navigator.userAgent;
+    if (/Win/i.test(ua)) return { os: "win", label: "Download for Windows" };
+    if (/Mac/i.test(ua)) {
+      const isArm =
+        /arm|aarch/i.test(navigator.platform ?? "") || ua.includes("ARM");
+      return {
+        os: "mac",
+        label: `Download for macOS`,
+        arch: isArm ? "arm64" : "x64",
+      };
+    }
+    if (/Linux/i.test(ua)) return { os: "linux", label: "Download for Linux" };
+    return null;
+  }
+
+  function pickAsset(
+    assets: Array<{ name: string; browser_download_url: string }>,
+    platform: Platform,
+  ): string | null {
+    if (platform.os === "win") {
+      return (
+        assets.find((a) => a.name.endsWith("-x64.exe"))
+          ?.browser_download_url ?? null
+      );
+    }
+    if (platform.os === "mac") {
+      const preferred = assets.find((a) =>
+        a.name.endsWith(`-${platform.arch}.dmg`),
+      );
+      const fallback = assets.find((a) => a.name.endsWith(".dmg"));
+      return (preferred ?? fallback)?.browser_download_url ?? null;
+    }
+    if (platform.os === "linux") {
+      return (
+        assets.find((a) => a.name.endsWith(".AppImage"))
+          ?.browser_download_url ?? null
+      );
+    }
+    return null;
+  }
+
+  async function init() {
+    const btn = document.getElementById("download-btn") as HTMLAnchorElement | null;
+    const label = document.getElementById("download-label");
+    if (!btn || !label) return;
+
+    const platform = detectPlatform();
+    if (!platform) return;
+
+    document.documentElement.dataset.platform = platform.os;
+    label.textContent = platform.label;
+
+    try {
+      const cached = sessionStorage.getItem("t3code-latest-release");
+      const data = cached
+        ? JSON.parse(cached)
+        : await fetch(API_URL).then((r) => r.json());
+
+      if (!cached && data?.assets) {
+        sessionStorage.setItem("t3code-latest-release", JSON.stringify(data));
+      }
+
+      const url = pickAsset(data.assets ?? [], platform);
+      if (url) {
+        btn.href = url;
+        btn.removeAttribute("target");
+        btn.removeAttribute("rel");
+      }
+    } catch {
+      btn.href = RELEASES_URL;
+    }
+  }
+
+  init();
+</script>
+
 <style>
   :root {
     --bg: #09090b;
@@ -198,7 +284,9 @@
   /* ── Hero button ── */
 
   .hero-button {
-    display: inline-block;
+    display: inline-flex;
+    align-items: center;
+    gap: 0.55rem;
     background: #fafafa;
     color: #09090b;
     padding: 0.75rem 2rem;
@@ -220,6 +308,25 @@
     transform: scale(0.98);
   }
 
+  .hero-button-icon {
+    display: none;
+    width: 1em;
+    height: 1em;
+    flex-shrink: 0;
+  }
+
+  :global([data-platform="mac"]) .hero-button-icon--apple {
+    display: block;
+  }
+
+  :global([data-platform="win"]) .hero-button-icon--windows {
+    display: block;
+  }
+
+  :global([data-platform="linux"]) .hero-button-icon--linux {
+    display: block;
+  }
+
   /* ── Screenshot ── */
 
   .screenshot-wrap {