refactor(primary): move gender split out of header into Pupils & Inclusion

Header "Pupils" line reverts to plain inline text matching Headteacher
and website weight. Gender split lives in Pupils & Inclusion as a card
alongside pupil premium / EAL / SEN support — peers of similar weight.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

nextjs-app/components/SchoolDetailView.module.css

@@ -83,95 +83,58 @@
     text-decoration: underline;
 }
 
-/* Pupils block — the "Pupils: N" inline text is upgraded to a richer
-   display whenever we have census gender data and the school is Mixed. */
-.pupilsBlock {
-    display: inline-flex;
-    align-items: center;
-    gap: 0.7rem;
-    padding: 0.3rem 0.65rem 0.3rem 0.4rem;
-    background: rgba(243, 237, 228, 0.5);
-    border-radius: 10px;
-}
-
-.pupilsFigure {
-    font-family: var(--font-playfair), 'Playfair Display', serif;
-    font-size: 1.6rem;
-    font-weight: 700;
-    line-height: 1;
-    letter-spacing: -0.01em;
-    color: var(--text-primary, #1a1612);
-}
-
-.pupilsInfo {
-    display: flex;
-    flex-direction: column;
-    gap: 0.15rem;
-    min-width: 140px;
-}
-
-.pupilsLegend {
-    font-size: 0.72rem;
-    color: var(--text-muted, #6d685f);
-    font-weight: 500;
-    line-height: 1;
-}
-
-.pupilsCapacity {
-    color: var(--text-muted, #6d685f);
-}
-
-.pupilsSplitRow {
+/* Gender split card — sits in the Pupils & Inclusion heroStatGrid */
+.genderSplitValue {
     display: flex;
     align-items: baseline;
-    gap: 0.35rem;
-    font-size: 0.75rem;
-    font-weight: 600;
+    gap: 0.3rem;
+    font-family: var(--font-playfair), "Playfair Display", Georgia, serif;
+    font-size: 1.55rem;
+    font-weight: 700;
     line-height: 1;
+    flex-wrap: wrap;
 }
 
-.pupilsSplitGirls {
+.genderSplitGirls {
     color: #b45778;
 }
 
-.pupilsSplitBoys {
+.genderSplitBoys {
     color: var(--accent-teal, #2d7d7d);
 }
 
-.pupilsSplitSep {
-    color: var(--border-color, #e5dfd5);
-    font-weight: 400;
+.genderSplitLabel {
+    font-family: var(--font-body, inherit);
+    font-size: 0.78rem;
+    font-weight: 500;
+    color: var(--text-muted, #6d685f);
+    letter-spacing: 0;
 }
 
-.pupilsBar {
+.genderSplitSep {
+    color: var(--border-color, #c8beb0);
+    font-weight: 400;
+    font-size: 1.2rem;
+    padding: 0 0.1rem;
+}
+
+.genderBar {
     display: flex;
-    height: 4px;
+    height: 6px;
     border-radius: 999px;
     overflow: hidden;
     background: var(--border-color, #e5dfd5);
     width: 100%;
-    min-width: 140px;
 }
 
-.pupilsBarGirls {
+.genderBarGirls {
     background: #b45778;
 }
 
-.pupilsBarBoys {
+.genderBarBoys {
     background: var(--accent-teal, #2d7d7d);
 }
 
-@media (max-width: 640px) {
-    .pupilsBlock {
-        display: flex;
-        width: 100%;
-    }
-    .pupilsInfo {
-        flex: 1;
-        min-width: 0;
-    }
-}
-
 .actions {
     display: flex;
     gap: 0.5rem;

nextjs-app/components/SchoolDetailView.tsx

@@ -109,11 +109,19 @@ export function SchoolDetailView({
     return `This school is in one of England's less deprived areas (decile ${decile}/10).`;
   };
 
+  // Gender split availability (only meaningful for Mixed schools with census data)
+  const isMixedSchool = schoolInfo.gender === 'Mixed' || schoolInfo.gender == null;
+  const hasGenderSplit = isMixedSchool
+    && census?.female_pupils != null
+    && census?.male_pupils != null
+    && (census.female_pupils + census.male_pupils) > 0;
+
   // Guard for Pupils & Inclusion — only show if at least one metric is available
   const hasInclusionData = (latestResults?.disadvantaged_pct != null)
     || (latestResults?.eal_pct != null)
     || (latestResults?.sen_support_pct != null)
-    || senDetail != null;
+    || senDetail != null
+    || hasGenderSplit;
 
   const hasSchoolLife = absenceData != null || census?.class_size_avg != null;
   const hasPhonics = phonics != null && phonics.year1_phonics_pct != null;
@@ -236,54 +244,14 @@ export function SchoolDetailView({
                 </span>
               )}
               {(() => {
-                const censusTotal = census?.total_pupils ?? null;
-                const female = census?.female_pupils ?? null;
-                const male = census?.male_pupils ?? null;
-                const total = censusTotal ?? latestResults?.total_pupils ?? null;
-                const isMixed = schoolInfo.gender === 'Mixed' || schoolInfo.gender == null;
-                const hasSplit = isMixed && female != null && male != null && female + male > 0;
-
-                if (hasSplit && total != null) {
-                  const sum = female! + male!;
-                  const girlsPct = Math.round((female! / sum) * 100);
-                  const boysPct = 100 - girlsPct;
-                  return (
-                    <div className={styles.pupilsBlock}>
-                      <div className={styles.pupilsFigure}>{total.toLocaleString()}</div>
-                      <div className={styles.pupilsInfo}>
-                        <div className={styles.pupilsLegend}>
-                          pupils
-                          {schoolInfo.capacity != null && (
-                            <span className={styles.pupilsCapacity}> · capacity {schoolInfo.capacity.toLocaleString()}</span>
-                          )}
-                        </div>
-                        <div className={styles.pupilsSplitRow}>
-                          <span className={styles.pupilsSplitGirls}>{girlsPct}% girls</span>
-                          <span className={styles.pupilsSplitSep}>·</span>
-                          <span className={styles.pupilsSplitBoys}>{boysPct}% boys</span>
-                        </div>
-                        <div
-                          className={styles.pupilsBar}
-                          role="img"
-                          aria-label={`Gender split: ${girlsPct}% girls, ${boysPct}% boys`}
-                        >
-                          <span className={styles.pupilsBarGirls} style={{ width: `${girlsPct}%` }} />
-                          <span className={styles.pupilsBarBoys} style={{ width: `${boysPct}%` }} />
-                        </div>
-                      </div>
-                    </div>
-                  );
-                }
-
-                if (total != null) {
+                const total = census?.total_pupils ?? latestResults?.total_pupils ?? null;
+                if (total == null) return null;
                 return (
                   <span className={styles.headerDetail}>
                     <strong>Pupils:</strong> {total.toLocaleString()}
                     {schoolInfo.capacity != null && ` (capacity: ${schoolInfo.capacity})`}
                   </span>
                 );
-                }
-                return null;
               })()}
               {schoolInfo.trust_name && (
                 <span className={styles.headerDetail}>
@@ -962,6 +930,35 @@ export function SchoolDetailView({
                 )}
               </div>
             )}
+            {hasGenderSplit && (() => {
+              const female = census!.female_pupils!;
+              const male = census!.male_pupils!;
+              const girlsPct = Math.round((female / (female + male)) * 100);
+              const boysPct = 100 - girlsPct;
+              return (
+                <div className={styles.heroStatCard}>
+                  <div className={styles.heroStatLabel}>Boys and girls</div>
+                  <div className={styles.genderSplitValue}>
+                    <span className={styles.genderSplitGirls}>{girlsPct}%</span>
+                    <span className={styles.genderSplitLabel}>girls</span>
+                    <span className={styles.genderSplitSep}>·</span>
+                    <span className={styles.genderSplitBoys}>{boysPct}%</span>
+                    <span className={styles.genderSplitLabel}>boys</span>
+                  </div>
+                  <div
+                    className={styles.genderBar}
+                    role="img"
+                    aria-label={`Gender split: ${girlsPct}% girls, ${boysPct}% boys`}
+                  >
+                    <span className={styles.genderBarGirls} style={{ width: `${girlsPct}%` }} />
+                    <span className={styles.genderBarBoys} style={{ width: `${boysPct}%` }} />
+                  </div>
+                  <div className={styles.heroStatHint}>
+                    {female.toLocaleString()} girls, {male.toLocaleString()} boys
+                  </div>
+                </div>
+              );
+            })()}
           </div>
           {senDetail && (
             <>