diff --git a/custom_theme/main.html b/custom_theme/main.html
index 8fa8a7f..3c2582b 100644
--- a/custom_theme/main.html
+++ b/custom_theme/main.html
@@ -130,6 +130,67 @@
 {% endif %}
 
 {{ super() }}
+
+<div>
+  <h2 id="__comments">{{ lang.t("meta.comments") }}</h2>
+
+  <!-- Comments via Giscus -->
+  <script src="https://giscus.app/client.js"
+    data-repo="jrcain-usgs/asc-public-docs"
+    data-repo-id="R_kgDOLBRqLQ"
+    data-category="Announcements"
+    data-category-id="DIC_kwDOLBRqLc4CfH7h"
+    data-mapping="pathname"
+    data-strict="0"
+    data-reactions-enabled="1"
+    data-emit-metadata="0"
+    data-input-position="bottom"
+    data-theme="preferred_color_scheme"
+    data-lang="en"
+    crossorigin="anonymous"
+    async>
+  </script>
+
+  <!-- Synchronize Giscus theme with palette -->
+  <script>
+    var giscus = document.querySelector("script[src*=giscus]")
+
+    // Set palette on initial load
+    var palette = __md_get("__palette")
+    if (palette && typeof palette.color === "object") {
+      var theme = palette.color.scheme === "slate"
+        ? "transparent_dark"
+        : "light"
+
+      // Instruct Giscus to set theme
+      giscus.setAttribute("data-theme", theme) 
+
+
+    }
+
+    // Register event handlers after documented loaded
+    document.addEventListener("DOMContentLoaded", function() {
+      var ref = document.querySelector("[data-md-component=palette]")
+      ref.addEventListener("change", function() {
+        var palette = __md_get("__palette")
+        if (palette && typeof palette.color === "object") {
+          var theme = palette.color.scheme === "slate"
+            ? "transparent_dark"
+            : "light"
+
+          // Instruct Giscus to change theme
+          var frame = document.querySelector(".giscus-frame")
+          frame.contentWindow.postMessage(
+            { giscus: { setConfig: { theme } } },
+            "https://giscus.app"
+          )
+        }
+      })
+    })
+  </script>
+
+</div>
+
 {% endblock content %}
 
 {% block footer %}