diff --git a/report.tmpl b/report.tmpl
index d85195c..6d56475 100644
--- a/report.tmpl
+++ b/report.tmpl
@@ -7,30 +7,45 @@
       import * as d3 from "https://cdn.jsdelivr.net/npm/d3@7/+esm";
     </script>
     <style>
-      column {
+      rows {
         display: flex;
         flex-direction: column;
         flex-grow: 1;
       }
-      row {
+      columns {
         display: flex;
         flex-direction: row;
         flex-grow: 1;
       }
+      rows, columns { border: 1px solid red; }
     </style>
   </header>
   <body>
     <h1>Report</h1>
-    <row>
-      <column>
-        <row>c1 r1</row>
-        <row>c1 r2</row>
-      </column>
-      <column>
-        <row>c2 r1</row>
-        <row>c2 r2</row>
-      </column>
-    </row>
+    <columns>
+      <rows style="max-width: 12.5em">
+        <columns>filter1</columns>
+        <columns>filter2</columns>
+      </rows>
+      <rows>
+        <rows>
+          <rows>
+            <h2>Alert Volume by Name</h2>
+            <div>DRAW ME</div>
+          </rows>
+          <columns>
+            <rows>
+              <h3>by Day</h3>
+              <div>DRAW ME</div>
+            </rows>
+            <rows>
+              <h3>by Hour</h3>
+              <div>DRAW ME</div>
+            </rows>
+          </columns>
+        </rows>
+      </rows>
+    </columns>
   </body>
   <footer>
   </footer>
