fix: measurement tier numbering 03/04/05, duplicate metric name, principle margin, financial efficiency 4th card

Author: claude

pages/measurement.html

@@ -279,7 +279,7 @@ <h1>How you know it's working.</h1>
 
       <div class="kpi-tier kpi-tier--ops">
         <div class="kpi-tier-header">
-          <div class="kpi-tier-num">02</div>
+          <div class="kpi-tier-num">03</div>
           <div>
             <div class="kpi-tier-name">Operational Impact</div>
             <div class="kpi-tier-q">Is it improving the work decisions are made from?</div>
@@ -379,7 +379,7 @@ <h1>How you know it's working.</h1>
 
       <div class="kpi-tier kpi-tier--finance">
         <div class="kpi-tier-header">
-          <div class="kpi-tier-num">03</div>
+          <div class="kpi-tier-num">04</div>
           <div>
             <div class="kpi-tier-name">Financial Efficiency</div>
             <div class="kpi-tier-q">Is it reducing avoidable cost and external spend?</div>
@@ -443,12 +443,28 @@ <h1>How you know it's working.</h1>
                 indicate unresolved coverage gaps.</div>
             </div>
           </div>
+          <div class="kpi-card">
+            <div class="kpi-micro-chart"><svg viewBox="0 0 200 36" preserveAspectRatio="none" fill="none">
+              <defs><linearGradient id="grad-roi" x1="0" y1="1" x2="0" y2="0"><stop offset="0%" stop-color="rgba(34,185,220,0)" /><stop offset="100%" stop-color="rgba(34,185,220,0.3)" /></linearGradient></defs>
+              <path d="M0,32 C40,30 80,22 120,14 C150,8 170,5 200,3 L200,36 L0,36 Z" fill="url(#grad-roi)"/>
+              <path d="M0,32 C40,30 80,22 120,14 C150,8 170,5 200,3" stroke="#22b9dc" stroke-width="1.5" fill="none" class="micro-line micro-line-delay3"/>
+              <text x="4" y="12" font-size="8" fill="rgba(255,255,255,0.3)" font-family="sans-serif">£ value per reuse event</text>
+              <text x="4" y="22" font-size="8" fill="rgba(255,255,255,0.2)" font-family="sans-serif">compounds with estate maturity</text>
+            </svg></div>
+            <div class="kpi-name">Knowledge Asset ROI</div>
+            <div class="kpi-desc">The measurable return generated per governed knowledge asset through reuse events, onboarding acceleration, and avoided reinvention cost. Provides the financial case for continued investment in governance.</div>
+            <div class="kpi-signal kpi-signal--good">
+              <div class="kpi-signal-type">Good Signal</div>
+              <div class="kpi-signal-bars"><div class="kpi-signal-bar"></div><div class="kpi-signal-bar"></div><div class="kpi-signal-bar"></div><div class="kpi-signal-bar"></div><div class="kpi-signal-bar"></div></div><div class="kpi-signal-label">The compounding effect</div>
+              <div class="kpi-signal-val">Asset ROI compounds as the estate matures. An asset reused ten times generates ten times the return on the original governance investment, with no incremental capture cost.</div>
+            </div>
+          </div>
         </div>
       </div>
 
       <div class="kpi-tier kpi-tier--health">
         <div class="kpi-tier-header">
-          <div class="kpi-tier-num">04</div>
+          <div class="kpi-tier-num">05</div>
           <div>
             <div class="kpi-tier-name">Estate Health</div>
             <div class="kpi-tier-q">Is the knowledge estate itself in good condition?</div>
@@ -463,7 +479,7 @@ <h1>How you know it's working.</h1>
               <text x="44" y="14" font-size="9" fill="#ef6b6b" font-family="Space Grotesk,sans-serif">70% domains</text>
               <text x="44" y="25" font-size="8" fill="rgba(255,255,255,0.25)" font-family="sans-serif">high concentration</text>
             </svg></div>
-            <div class="kpi-name">Concentration Risk Index</div>
+            <div class="kpi-name">Domain Concentration Score</div>
             <div class="kpi-desc">The proportion of critical knowledge domains where fewer than a defined threshold of
               people hold the relevant expertise. A domain where only one or two people are the recognised source of
               truth is a concentration risk - regardless of whether that knowledge has been documented.</div>
@@ -536,7 +552,7 @@ <h1>How you know it's working.</h1>
 
     </div>
 
-    <div class="kpi-principle fade-in">
+    <div class="kpi-principle fade-in" style="margin-top:0;">
       <div class="kpi-principle-icon">◆</div>
       <div class="kpi-principle-text">
         <div class="kpi-principle-head">The measurement principle</div>