diff --git a/src/components/RepoHealthPanel.tsx b/src/components/RepoHealthPanel.tsx
new file mode 100644
index 00000000..36b10d9c
--- /dev/null
+++ b/src/components/RepoHealthPanel.tsx
@@ -0,0 +1,100 @@
+"use client";
+
+import { useEffect } from "react";
+import type { RepoHealthScore } from "@/types/repo-health";
+interface Props {
+  health: RepoHealthScore;
+  isOpen: boolean;
+  onClose: () => void;
+}
+
+function ScoreBar({ score, maxScore }: { score: number; maxScore: number }) {
+  const pct = Math.round((score / maxScore) * 100);
+  const color = pct >= 70 ? "bg-[var(--accent)]" : pct >= 40 ? "bg-[var(--warning)]" : "bg-[var(--destructive)]";
+  return (
+    <div className="h-1.5 w-full overflow-hidden rounded-full bg-[var(--control)]">
+      <div className={`h-full rounded-full transition-all duration-500 ${color}`} style={{ width: `${pct}%` }} />
+    </div>
+  );
+}
+
+export default function RepoHealthPanel({ health, isOpen, onClose }: Props) {
+  useEffect(() => {
+    const handler = (e: KeyboardEvent) => {
+      if (e.key === "Escape") {
+        onClose();
+      }
+    };
+
+    document.addEventListener("keydown", handler);
+
+    return () => {
+      document.removeEventListener("keydown", handler);
+    };
+  }, [onClose]);
+
+  if (!isOpen) return null;
+  const s = health.signals;
+  const shortName = health.repo.split("/")[1] ?? health.repo;
+
+  const commitScore = Math.min(20, Math.round((s.commitFrequency / 10) * 20));
+  const prScore = Math.min(20, Math.round(s.prMergeRate * 25));
+  const prTimeScore = s.avgPrOpenTimeHours === 0 ? 20 : Math.max(0, Math.round(20 - (s.avgPrOpenTimeHours / 168) * 20));
+  const issueScore = Math.max(0, Math.round(20 - s.openIssuesCount * 2));
+  const recencyScore = Math.max(0, Math.round(20 - (s.daysSinceLastCommit / 30) * 20));
+
+  const dimensions = [
+    { label: "Commit Activity", score: commitScore, tip: commitScore < 10 ? "Aim for at least 10 commits per month." : "Good commit frequency!" },
+    { label: "PR Merge Rate", score: prScore, tip: prScore < 10 ? "Review and close stale pull requests." : "Healthy merge rate." },
+    { label: "PR Turnaround", score: prTimeScore, tip: prTimeScore < 10 ? "Try to review and merge PRs faster." : "PRs are moving quickly." },
+    { label: "Issue Load", score: issueScore, tip: issueScore < 10 ? "Triage and close outdated issues." : "Issue backlog looks manageable." },
+    { label: "Recent Activity", score: recencyScore, tip: recencyScore < 10 ? `Last commit was ${s.daysSinceLastCommit} days ago.` : "Repo is actively maintained." },
+  ];
+
+  return (
+      <div
+        className="fixed inset-0 z-50 flex items-end justify-center sm:items-center"
+        role="dialog"
+        aria-modal="true"
+        aria-labelledby="health-panel-title"
+      >
+      <div className="absolute inset-0 bg-black/50" onClick={onClose} aria-hidden="true" />
+      <div className="relative z-10 w-full max-w-md rounded-t-2xl sm:rounded-2xl border border-[var(--border)] bg-[var(--card)] p-6 shadow-xl">
+        <div className="flex items-center justify-between mb-5">
+          <div>
+            <h2
+              id="health-panel-title"
+              className="text-base font-semibold text-[var(--card-foreground)]"
+            >
+              Health Breakdown
+            </h2>
+            <p className="text-sm text-[var(--muted-foreground)]">{shortName}</p>
+          </div>
+          <div className="flex items-center gap-3">
+            <span className={`text-2xl font-bold ${health.grade === "green" ? "text-[var(--accent)]" : health.grade === "yellow" ? "text-[var(--warning,#ca8a04)]" : "text-[var(--destructive)]"}`}>
+              {health.score}
+            </span>
+            <button type="button" onClick={onClose} className="rounded-lg p-1.5 text-[var(--muted-foreground)] hover:bg-[var(--control)] transition-colors" aria-label="Close panel">
+              ✕
+            </button>
+          </div>
+        </div>
+        <div className="space-y-4">
+          {dimensions.map((dim) => (
+            <div key={dim.label}>
+              <div className="flex items-center justify-between text-sm mb-1">
+                <span className="text-[var(--card-foreground)]">{dim.label}</span>
+                <span className="text-[var(--muted-foreground)] tabular-nums">{dim.score}/20</span>
+              </div>
+              <ScoreBar score={dim.score} maxScore={20} />
+              {dim.score < 20 && <p className="mt-1 text-xs text-[var(--muted-foreground)]">{dim.tip}</p>}
+            </div>
+          ))}
+        </div>
+        <p className="mt-5 text-xs text-[var(--muted-foreground)] border-t border-[var(--border)] pt-4">
+          Score based on activity in the last 30 days. Updates on page refresh.
+        </p>
+      </div>
+    </div>
+  );
+}
diff --git a/src/components/TopRepos.tsx b/src/components/TopRepos.tsx
index a7b96ea7..4f7a5915 100644
--- a/src/components/TopRepos.tsx
+++ b/src/components/TopRepos.tsx
@@ -3,6 +3,7 @@
 import { useCallback, useEffect, useState } from "react";
 import { useAccount } from "@/components/AccountContext";
 import type { RepoHealthScore } from "@/types/repo-health";
+import RepoHealthPanel from "@/components/RepoHealthPanel";
 
 interface RepoLanguage {
   name: string;
@@ -84,7 +85,7 @@ export default function TopRepos() {
   const [sortDirection, setSortDirection] = useState<"asc" | "desc">("desc");
   const [pinnedRepos, setPinnedRepos] = useState<string[]>([]);
   const [pinError, setPinError] = useState<string | null>(null);
-
+  const [activeHealthRepo, setActiveHealthRepo] = useState<string | null>(null);
   useEffect(() => {
     fetch("/api/user/settings")
       .then((r) => r.json())
@@ -326,12 +327,15 @@ export default function TopRepos() {
                     {healthLoading ? (
                       <div className="h-5 w-9 rounded bg-[var(--card-muted)] animate-pulse" />
                     ) : health ? (
-                      <span
-                        className={`inline-flex items-center rounded-full px-2 py-0.5 text-xs font-semibold ${badgeClass}`}
+                      <button
+                        type="button"
+                        onClick={() => setActiveHealthRepo(repo.name)}
+                        className={`inline-flex items-center rounded-full px-2 py-0.5 text-xs font-semibold cursor-pointer ${badgeClass}`}
                         title={badgeTitle}
+                        aria-label={`View health breakdown for ${shortName}`}
                       >
                         {health.score}
-                      </span>
+                      </button>
                     ) : (
                       <span
                         className="inline-flex items-center rounded-full border border-[var(--border)] bg-[var(--control)] px-2 py-0.5 text-xs font-semibold text-[var(--muted-foreground)]"
@@ -405,6 +409,13 @@ export default function TopRepos() {
          {minutesAgo === 0 ? "Updated just now" : `Updated ${minutesAgo} min ago`}
         </p>
      )}
+      {activeHealthRepo && healthScores[activeHealthRepo] && (
+        <RepoHealthPanel
+          health={healthScores[activeHealthRepo]}
+          isOpen={true}
+          onClose={() => setActiveHealthRepo(null)}
+        />
+      )}
     </div>
   );
 }