diff --git a/Auto Run Docs/SpecKit-web-header-analyzer-Phase-09-Polish.md b/Auto Run Docs/SpecKit-web-header-analyzer-Phase-09-Polish.md
index a964997..d814bb0 100644
--- a/Auto Run Docs/SpecKit-web-header-analyzer-Phase-09-Polish.md	
+++ b/Auto Run Docs/SpecKit-web-header-analyzer-Phase-09-Polish.md	
@@ -19,7 +19,7 @@ This phase performs final integration, accessibility audit, responsive testing,
 
 - [x] T046 Wire all components together in `frontend/src/app/page.tsx` — integrate HeaderInput, FileDropZone, AnalysisControls, AnalyseButton, ProgressIndicator, ReportContainer, CaptchaChallenge into the single-view application with correct data flow. Ensure: input feeds to analysis hook, progress hook drives progress indicator, result feeds to report container, 429 errors trigger CAPTCHA modal, cache hook restores state on mount. Notes: added AnalysisControls + CAPTCHA retry flow, extended analysis hook for bypass token handling, confirmed cache restore.
 - [x] T047 Verify WCAG 2.1 AA compliance across all components (NFR-03) — ARIA labels, keyboard nav order, focus indicators, colour contrast ratios (dark theme). Fix violations. Test with screen reader simulation. Ensure all interactive elements have visible focus states. Notes: added keyboard-accessible file picker with ARIA descriptions, focus-visible outlines on drop zone/summary/search fields, boosted low-contrast text from 40% to 60%, linked CAPTCHA dialog description, added file picker tests; ran `npx vitest run src/__tests__/FileDropZone.test.tsx`.
-- [ ] T048 [P] Verify responsive layout 320px–2560px (NFR-04) at breakpoints: 320px, 768px, 1024px, 1440px, 2560px. No horizontal scroll, no overlapping elements, readable text. Fix any layout issues discovered
+- [x] T048 [P] Verify responsive layout 320px–2560px (NFR-04) at breakpoints: 320px, 768px, 1024px, 1440px, 2560px. No horizontal scroll, no overlapping elements, readable text. Fix any layout issues discovered. Notes: stacked control cards on small screens, added min-w-0 + flex-wrap on report UI, and break-words handling for long header values, hop chain hostnames/IPs, and search pills to prevent overflow.
 - [ ] T049 [P] Run full linting pass — `ruff check backend/` and `ruff format backend/` zero errors; `npx eslint src/` and `npx prettier --check src/` zero errors; no `any` types in TypeScript. Fix all violations
 - [ ] T050 [P] Run full test suites and verify coverage — `pytest backend/tests/ --cov` ≥80% new modules (NFR-06); `npx vitest run --coverage` ≥80% new components (NFR-07). Add missing tests if coverage is below threshold
 - [ ] T051 [P] Verify initial page load <3s on simulated 4G (constitution P7). Use Lighthouse with Slow 4G preset. Target score ≥90. Fix blocking resources or missing lazy-loading if score is below target
diff --git a/frontend/src/__tests__/report/HopChainVisualisation.test.tsx b/frontend/src/__tests__/report/HopChainVisualisation.test.tsx
index 90c10a1..1ead9b1 100644
--- a/frontend/src/__tests__/report/HopChainVisualisation.test.tsx
+++ b/frontend/src/__tests__/report/HopChainVisualisation.test.tsx
@@ -88,4 +88,16 @@ describe("HopChainVisualisation", () => {
 
     expect(connectors.length).toBe(hopChain.length - 1);
   });
+
+  it("adds wrapping classes for long hostnames and IPs", () => {
+    const { container } = render(<HopChainVisualisation hopChain={hopChain} />);
+
+    const firstHop = getByTestId(container, "hop-chain-node-0");
+    const spanNodes = Array.from(firstHop.querySelectorAll("span"));
+    const hostnameNode = spanNodes.find((node) => node.textContent === "mail.sender.example");
+    const ipNode = spanNodes.find((node) => node.textContent === "192.0.2.10");
+
+    expect(hostnameNode?.className ?? "").toContain("break-words");
+    expect(ipNode?.className ?? "").toContain("break-all");
+  });
 });
diff --git a/frontend/src/__tests__/report/TestResultCard.test.tsx b/frontend/src/__tests__/report/TestResultCard.test.tsx
index 7137047..d7f34c0 100644
--- a/frontend/src/__tests__/report/TestResultCard.test.tsx
+++ b/frontend/src/__tests__/report/TestResultCard.test.tsx
@@ -127,4 +127,25 @@ describe("TestResultCard", () => {
     const errorIndicator = getByTestId(container, `test-result-error-${result.testId}`);
     expect(errorIndicator.textContent ?? "").toMatch(/SpamAssassin database timeout/);
   });
+
+  it("adds wrapping classes for long header values", () => {
+    const result = buildResult({
+      testId: 505,
+      headerValue: "X".repeat(200),
+    });
+    const { container } = render(<TestResultCard result={result} />);
+
+    const details = container.querySelector(`#test-result-details-${result.testId}`);
+    if (!details) {
+      throw new Error("Expected test details container to be rendered.");
+    }
+
+    const headerValue = details.querySelector("span.font-mono");
+    if (!headerValue) {
+      throw new Error("Expected header value to be rendered.");
+    }
+
+    expect(headerValue.className).toContain("break-words");
+    expect(headerValue.className).toContain("whitespace-pre-wrap");
+  });
 });
diff --git a/frontend/src/components/AnalysisControls.tsx b/frontend/src/components/AnalysisControls.tsx
index c5ceef0..cb69a90 100644
--- a/frontend/src/components/AnalysisControls.tsx
+++ b/frontend/src/components/AnalysisControls.tsx
@@ -59,7 +59,7 @@ export default function AnalysisControls({ config, onChange }: AnalysisControlsP
           <span className="font-mono text-[10px] text-text/50">US2</span>
         </div>
         <div className="mt-4 grid gap-3 sm:grid-cols-2">
-          <div className="flex items-center justify-between gap-4 rounded-xl border border-info/10 bg-background/40 p-4">
+          <div className="flex flex-col items-start gap-3 rounded-xl border border-info/10 bg-background/40 p-4 sm:flex-row sm:items-center sm:justify-between">
             <div className="flex items-start gap-3">
               <div className="mt-1 rounded-full border border-info/20 bg-background/60 p-2 text-xs text-info/80">
                 <FontAwesomeIcon icon={faGlobe} />
@@ -83,7 +83,7 @@ export default function AnalysisControls({ config, onChange }: AnalysisControlsP
               {resolvedConfig.resolve ? "On" : "Off"}
             </button>
           </div>
-          <div className="flex items-center justify-between gap-4 rounded-xl border border-info/10 bg-background/40 p-4">
+          <div className="flex flex-col items-start gap-3 rounded-xl border border-info/10 bg-background/40 p-4 sm:flex-row sm:items-center sm:justify-between">
             <div className="flex items-start gap-3">
               <div className="mt-1 rounded-full border border-info/20 bg-background/60 p-2 text-xs text-info/80">
                 <FontAwesomeIcon icon={faCode} />
diff --git a/frontend/src/components/AnalysisResults.tsx b/frontend/src/components/AnalysisResults.tsx
index c7790f4..57344d9 100644
--- a/frontend/src/components/AnalysisResults.tsx
+++ b/frontend/src/components/AnalysisResults.tsx
@@ -52,9 +52,11 @@ export default function AnalysisResults({ report }: AnalysisResultsProps) {
               className="rounded-2xl border border-info/10 bg-background/40 p-4"
             >
               <div className="flex flex-wrap items-center justify-between gap-3">
-                <div className="flex flex-col">
-                  <span className="text-sm font-semibold text-text/90">{result.testName}</span>
-                  <span className="text-xs text-text/50">
+                <div className="min-w-0 flex flex-col">
+                  <span className="break-words text-sm font-semibold text-text/90">
+                    {result.testName}
+                  </span>
+                  <span className="break-words text-xs text-text/50">
                     Test #{result.testId} · {result.headerName}
                   </span>
                 </div>
@@ -69,10 +71,10 @@ export default function AnalysisResults({ report }: AnalysisResultsProps) {
               </div>
 
               {result.analysis ? (
-                <p className="mt-3 text-sm text-text/70">{result.analysis}</p>
+                <p className="mt-3 break-words text-sm text-text/70">{result.analysis}</p>
               ) : null}
               {result.description ? (
-                <p className="mt-1 text-xs text-text/50">{result.description}</p>
+                <p className="mt-1 break-words text-xs text-text/50">{result.description}</p>
               ) : null}
 
               {result.status === "error" ? (
diff --git a/frontend/src/components/ProgressIndicator.tsx b/frontend/src/components/ProgressIndicator.tsx
index 5711c0b..16482a3 100644
--- a/frontend/src/components/ProgressIndicator.tsx
+++ b/frontend/src/components/ProgressIndicator.tsx
@@ -142,7 +142,10 @@ export default function ProgressIndicator({
 
       <div className="mt-4 space-y-3">
         <div className="flex flex-wrap items-center justify-between gap-2">
-          <span data-testid="progress-current-test" className="text-sm font-semibold text-text/80">
+          <span
+            data-testid="progress-current-test"
+            className="break-words text-sm font-semibold text-text/80"
+          >
             {progress?.currentTest ?? "Preparing analysis"}
           </span>
           <span data-testid="progress-percentage" className="text-sm font-semibold text-text/70">
@@ -170,7 +173,7 @@ export default function ProgressIndicator({
         >
           <p className="font-semibold text-spam">Timeout reached at {timeoutSeconds} seconds.</p>
           <p className="mt-2 text-text/70">Incomplete tests:</p>
-          <p data-testid="timeout-tests" className="mt-1 font-mono text-text/70">
+          <p data-testid="timeout-tests" className="mt-1 break-words font-mono text-text/70">
             {incompleteTests.length > 0 ? incompleteTests.join(", ") : "None"}
           </p>
         </div>
diff --git a/frontend/src/components/report/HopChainVisualisation.tsx b/frontend/src/components/report/HopChainVisualisation.tsx
index 879f584..0094106 100644
--- a/frontend/src/components/report/HopChainVisualisation.tsx
+++ b/frontend/src/components/report/HopChainVisualisation.tsx
@@ -47,22 +47,24 @@ export default function HopChainVisualisation({ hopChain }: HopChainVisualisatio
                   <span className="flex h-10 w-10 items-center justify-center rounded-xl border border-info/20 bg-info/10 text-info">
                     <FontAwesomeIcon icon={faServer} />
                   </span>
-                  <div className="flex-1">
+                  <div className="min-w-0 flex-1">
                     <div className="flex flex-wrap items-baseline gap-2">
-                      <span className="text-sm font-semibold text-text/90">{node.hostname}</span>
+                      <span className="break-words text-sm font-semibold text-text/90">
+                        {node.hostname}
+                      </span>
                       {node.ip ? (
-                        <span className="font-mono text-xs text-text/60">{node.ip}</span>
+                        <span className="break-all font-mono text-xs text-text/60">{node.ip}</span>
                       ) : null}
                     </div>
                     <div className="mt-2 flex flex-wrap gap-4 text-xs text-text/60">
                       {node.timestamp ? (
-                        <span className="flex items-center gap-2">
+                        <span className="flex items-center gap-2 break-words">
                           <FontAwesomeIcon icon={faClock} className="text-[10px]" />
                           {node.timestamp}
                         </span>
                       ) : null}
                       {node.serverInfo ? (
-                        <span className="flex items-center gap-2">
+                        <span className="flex items-center gap-2 break-words">
                           <FontAwesomeIcon icon={faNetworkWired} className="text-[10px]" />
                           {node.serverInfo}
                         </span>
diff --git a/frontend/src/components/report/ReportSearchBar.tsx b/frontend/src/components/report/ReportSearchBar.tsx
index 7b8bc3e..f9c48b6 100644
--- a/frontend/src/components/report/ReportSearchBar.tsx
+++ b/frontend/src/components/report/ReportSearchBar.tsx
@@ -40,14 +40,14 @@ export default function ReportSearchBar({
       className="rounded-2xl border border-info/10 bg-surface/50 p-4 shadow-[0_0_30px_rgba(15,23,42,0.18)]"
     >
       <div className="flex flex-wrap items-center gap-3">
-        <label className="flex flex-1 items-center gap-2 rounded-full border border-info/20 bg-background/40 px-3 py-2 text-sm text-text/70 focus-within:border-info/40 focus-within:outline focus-within:outline-2 focus-within:outline-offset-2 focus-within:outline-info">
+        <label className="flex min-w-0 flex-1 items-center gap-2 rounded-full border border-info/20 bg-background/40 px-3 py-2 text-sm text-text/70 focus-within:border-info/40 focus-within:outline focus-within:outline-2 focus-within:outline-offset-2 focus-within:outline-info">
           <FontAwesomeIcon icon={faMagnifyingGlass} className="text-xs text-text/60" />
           <input
             type="text"
             value={query}
             onInput={handleInput}
             onKeyDown={handleKeyDown}
-            className="flex-1 bg-transparent text-xs text-text/80 focus-visible:outline focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-info"
+            className="min-w-0 flex-1 bg-transparent text-xs text-text/80 focus-visible:outline focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-info"
             placeholder="Search test names, headers, or analysis"
             data-testid="report-search-input"
             aria-label="Search report results"
@@ -77,7 +77,7 @@ export default function ReportSearchBar({
       <div className="mt-2 flex flex-wrap items-center gap-2 text-[11px] text-text/50">
         <span>{hasQuery ? "Matches for" : "Showing all results"}</span>
         {hasQuery ? (
-          <span className="rounded-full border border-accent/30 bg-accent/10 px-2 py-0.5 font-mono text-[10px] text-accent">
+          <span className="max-w-full break-words rounded-full border border-accent/30 bg-accent/10 px-2 py-0.5 font-mono text-[10px] text-accent">
             {query}
           </span>
         ) : null}
diff --git a/frontend/src/components/report/SecurityAppliancesSummary.tsx b/frontend/src/components/report/SecurityAppliancesSummary.tsx
index 53f6cf7..2b0d65f 100644
--- a/frontend/src/components/report/SecurityAppliancesSummary.tsx
+++ b/frontend/src/components/report/SecurityAppliancesSummary.tsx
@@ -35,11 +35,11 @@ export default function SecurityAppliancesSummary({ appliances }: SecurityApplia
             <div
               key={`${appliance.vendor}-${appliance.name}`}
               data-testid={`security-appliance-${index}`}
-              className="inline-flex items-center gap-2 rounded-full border border-info/20 bg-background/40 px-3 py-1 text-xs text-text/70"
+              className="inline-flex max-w-full flex-wrap items-center gap-2 rounded-full border border-info/20 bg-background/40 px-3 py-1 text-xs text-text/70"
             >
               <FontAwesomeIcon icon={faShield} className="text-[10px] text-info" />
-              <span className="font-semibold">{appliance.vendor}</span>
-              <span className="text-text/50">{appliance.name}</span>
+              <span className="break-words font-semibold">{appliance.vendor}</span>
+              <span className="break-words text-text/50">{appliance.name}</span>
             </div>
           ))}
         </div>
diff --git a/frontend/src/components/report/TestResultCard.tsx b/frontend/src/components/report/TestResultCard.tsx
index 9f972e5..3099378 100644
--- a/frontend/src/components/report/TestResultCard.tsx
+++ b/frontend/src/components/report/TestResultCard.tsx
@@ -101,10 +101,10 @@ export default function TestResultCard({ result, highlightQuery = "" }: TestResu
         aria-controls={detailsId}
         onClick={toggle}
         onKeyDown={handleKeyDown}
-        className="flex w-full items-center justify-between gap-4 text-left focus-visible:outline focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-info"
+        className="flex w-full flex-wrap items-center justify-between gap-4 text-left focus-visible:outline focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-info"
       >
-        <div className="flex flex-col">
-          <span className="text-sm font-semibold text-text/90">
+        <div className="min-w-0 flex flex-col">
+          <span className="break-words text-sm font-semibold text-text/90">
             {highlightText(result.testName, highlightQuery)}
           </span>
           <span className="text-xs text-text/50">Test #{result.testId}</span>
@@ -136,19 +136,21 @@ export default function TestResultCard({ result, highlightQuery = "" }: TestResu
           <div className="rounded-xl border border-info/10 bg-background/40 p-3">
             <div className="flex flex-col gap-1">
               <span className="text-[10px] uppercase tracking-[0.2em] text-text/60">Header</span>
-              <span className="text-xs text-text/60">
+              <span className="break-words text-xs text-text/60">
                 {highlightText(result.headerName, highlightQuery)}
               </span>
-              <span className="font-mono text-sm text-text/80">{result.headerValue}</span>
+              <span className="break-words whitespace-pre-wrap font-mono text-sm text-text/80">
+                {result.headerValue}
+              </span>
             </div>
 
             {result.analysis ? (
-              <p className="mt-3 text-sm text-text/70">
+              <p className="mt-3 break-words text-sm text-text/70">
                 {highlightText(result.analysis, highlightQuery)}
               </p>
             ) : null}
             {result.description ? (
-              <p className="mt-1 text-xs text-text/50">{result.description}</p>
+              <p className="mt-1 break-words text-xs text-text/50">{result.description}</p>
             ) : null}
 
             {result.status === "error" ? (