fix(escuchar,reproductor): add the section-heading token and screen 1-3 polish

Audit S7 plus the open items on screens 1-3. Escuchar gains the
prototype's own 52px "now listening" eyebrow header (t4:53), which is
structurally different from the 56px title row every other root uses
(t4:325) -- the earlier wiring test asserted PluriRootHeader on all five
roots, an over-broad premise now corrected to guard what actually holds:
no AppBar, and the sleep-timer action still reachable.

lib/l10n/app_ar.arb

@@ -816,5 +816,7 @@
   "welcomeBullet3Title": "منبهات موسيقية",
   "welcomeCtaLabel": "ابدأ الاستماع",
   "welcomeHeadline": "عالمك، على الهواء مباشرة",
-  "yourStationsTitle": "محطاتك"
+  "yourStationsTitle": "محطاتك",
+  "nowListeningLabel": "الاستماع الآن",
+  "popularNowTitle": "الأكثر شيوعًا الآن"
 }

lib/l10n/app_bn.arb

@@ -816,5 +816,7 @@
   "welcomeBullet3Title": "সুরেলা অ্যালার্ম",
   "welcomeCtaLabel": "শোনা শুরু করুন",
   "welcomeHeadline": "আপনার বিশ্ব, সরাসরি",
-  "yourStationsTitle": "আপনার স্টেশন"
+  "yourStationsTitle": "আপনার স্টেশন",
+  "nowListeningLabel": "এখন শোনা হচ্ছে",
+  "popularNowTitle": "এখন জনপ্রিয়"
 }

lib/l10n/app_de.arb

@@ -816,5 +816,7 @@
   "welcomeBullet3Title": "Musikalarme",
   "welcomeCtaLabel": "Jetzt hören",
   "welcomeHeadline": "Deine Welt, live",
-  "yourStationsTitle": "Deine Sender"
+  "yourStationsTitle": "Deine Sender",
+  "nowListeningLabel": "Läuft gerade",
+  "popularNowTitle": "Jetzt beliebt"
 }

lib/l10n/app_en.arb

@@ -358,6 +358,7 @@
   "yourStationsTitle": "Your stations",
   "seeAllAction": "See all",
   "openFullPlayerTooltip": "Open full player",
+  "nowListeningLabel": "Now listening",
   "nothingPlayingTitle": "Nothing playing yet",
   "nothingPlayingSubtitle": "Pick a station from Your stations or search to start.",
   "nearYou": "Near you",
@@ -375,6 +376,7 @@
   "exploreTrendingSubtitle": "Today",
   "exploreNewTitle": "New",
   "exploreNewSubtitle": "This week",
+  "popularNowTitle": "Popular now",
   "offlineBannerTitle": "No connection",
   "retryAction": "Retry",
   "noStationsAvailable": "No stations available",

lib/l10n/app_es.arb

@@ -358,6 +358,7 @@
   "yourStationsTitle": "Tus emisoras",
   "seeAllAction": "Ver todas",
   "openFullPlayerTooltip": "Abrir reproductor completo",
+  "nowListeningLabel": "Escuchando ahora",
   "nothingPlayingTitle": "Todavía no estás escuchando nada",
   "nothingPlayingSubtitle": "Elegí una emisora de Tus emisoras o buscá una para empezar.",
   "nearYou": "Cerca de vos",
@@ -375,6 +376,7 @@
   "exploreTrendingSubtitle": "Hoy",
   "exploreNewTitle": "Novedades",
   "exploreNewSubtitle": "Esta semana",
+  "popularNowTitle": "Populares ahora",
   "offlineBannerTitle": "Sin conexión",
   "retryAction": "Reintentar",
   "noStationsAvailable": "No hay emisoras disponibles",

lib/l10n/app_fr.arb

@@ -816,5 +816,7 @@
   "welcomeBullet3Title": "Alarmes musicales",
   "welcomeCtaLabel": "Commencer à écouter",
   "welcomeHeadline": "Votre monde, en direct",
-  "yourStationsTitle": "Vos stations"
+  "yourStationsTitle": "Vos stations",
+  "nowListeningLabel": "En cours d'écoute",
+  "popularNowTitle": "Populaire maintenant"
 }

lib/l10n/app_hi.arb

@@ -816,5 +816,7 @@
   "welcomeBullet3Title": "संगीत अलार्म",
   "welcomeCtaLabel": "सुनना शुरू करें",
   "welcomeHeadline": "आपकी दुनिया, लाइव",
-  "yourStationsTitle": "आपके स्टेशन"
+  "yourStationsTitle": "आपके स्टेशन",
+  "nowListeningLabel": "अभी सुन रहे हैं",
+  "popularNowTitle": "अभी लोकप्रिय"
 }

lib/l10n/app_id.arb

@@ -816,5 +816,7 @@
   "welcomeBullet3Title": "Alarm musik",
   "welcomeCtaLabel": "Mulai mendengarkan",
   "welcomeHeadline": "Duniamu, secara langsung",
-  "yourStationsTitle": "Stasiun Anda"
+  "yourStationsTitle": "Stasiun Anda",
+  "nowListeningLabel": "Sedang mendengarkan",
+  "popularNowTitle": "Populer sekarang"
 }

lib/l10n/app_it.arb

@@ -816,5 +816,7 @@
   "welcomeBullet3Title": "Sveglie musicali",
   "welcomeCtaLabel": "Inizia ad ascoltare",
   "welcomeHeadline": "Il tuo mondo, in diretta",
-  "yourStationsTitle": "Le tue emittenti"
+  "yourStationsTitle": "Le tue emittenti",
+  "nowListeningLabel": "In ascolto ora",
+  "popularNowTitle": "Popolari ora"
 }

lib/l10n/app_ja.arb

@@ -816,5 +816,7 @@
   "welcomeBullet3Title": "音楽アラーム",
   "welcomeCtaLabel": "聴き始める",
   "welcomeHeadline": "あなたの世界を、ライブで",
-  "yourStationsTitle": "あなたの局"
+  "yourStationsTitle": "あなたの局",
+  "nowListeningLabel": "再生中",
+  "popularNowTitle": "今人気"
 }

lib/l10n/app_pt.arb

@@ -816,5 +816,7 @@
   "welcomeBullet3Title": "Alarmes musicais",
   "welcomeCtaLabel": "Começar a ouvir",
   "welcomeHeadline": "Seu mundo, ao vivo",
-  "yourStationsTitle": "Suas estações"
+  "yourStationsTitle": "Suas estações",
+  "nowListeningLabel": "Ouvindo agora",
+  "popularNowTitle": "Populares agora"
 }

lib/l10n/app_ru.arb

@@ -816,5 +816,7 @@
   "welcomeBullet3Title": "Музыкальные будильники",
   "welcomeCtaLabel": "Начать слушать",
   "welcomeHeadline": "Ваш мир, в прямом эфире",
-  "yourStationsTitle": "Ваши станции"
+  "yourStationsTitle": "Ваши станции",
+  "nowListeningLabel": "Сейчас слушаете",
+  "popularNowTitle": "Популярно сейчас"
 }

lib/l10n/app_zh.arb

@@ -816,5 +816,7 @@
   "welcomeBullet3Title": "音乐闹钟",
   "welcomeCtaLabel": "开始收听",
   "welcomeHeadline": "你的世界，直播中",
-  "yourStationsTitle": "你的电台"
+  "yourStationsTitle": "你的电台",
+  "nowListeningLabel": "正在收听",
+  "popularNowTitle": "当前热门"
 }

lib/l10n/gen/app_localizations.dart

@@ -1402,6 +1402,12 @@ abstract class AppLocalizations {
   /// **'Abrir reproductor completo'**
   String get openFullPlayerTooltip;
 
+  /// No description provided for @nowListeningLabel.
+  ///
+  /// In es, this message translates to:
+  /// **'Escuchando ahora'**
+  String get nowListeningLabel;
+
   /// No description provided for @nothingPlayingTitle.
   ///
   /// In es, this message translates to:
@@ -1474,6 +1480,12 @@ abstract class AppLocalizations {
   /// **'Esta semana'**
   String get exploreNewSubtitle;
 
+  /// No description provided for @popularNowTitle.
+  ///
+  /// In es, this message translates to:
+  /// **'Populares ahora'**
+  String get popularNowTitle;
+
   /// No description provided for @offlineBannerTitle.
   ///
   /// In es, this message translates to:

lib/l10n/gen/app_localizations_ar.dart

@@ -745,6 +745,9 @@ class AppLocalizationsAr extends AppLocalizations {
   @override
   String get openFullPlayerTooltip => 'فتح المشغل الكامل';
 
+  @override
+  String get nowListeningLabel => 'الاستماع الآن';
+
   @override
   String get nothingPlayingTitle => 'لا تستمع إلى شيء بعد';
 
@@ -784,6 +787,9 @@ class AppLocalizationsAr extends AppLocalizations {
   @override
   String get exploreNewSubtitle => 'هذا الأسبوع';
 
+  @override
+  String get popularNowTitle => 'الأكثر شيوعًا الآن';
+
   @override
   String get offlineBannerTitle => 'لا يوجد اتصال';
 

lib/l10n/gen/app_localizations_bn.dart

@@ -748,6 +748,9 @@ class AppLocalizationsBn extends AppLocalizations {
   @override
   String get openFullPlayerTooltip => 'সম্পূর্ণ প্লেয়ার খুলুন';
 
+  @override
+  String get nowListeningLabel => 'এখন শোনা হচ্ছে';
+
   @override
   String get nothingPlayingTitle => 'এখনও কিছু চলছে না';
 
@@ -787,6 +790,9 @@ class AppLocalizationsBn extends AppLocalizations {
   @override
   String get exploreNewSubtitle => 'এই সপ্তাহে';
 
+  @override
+  String get popularNowTitle => 'এখন জনপ্রিয়';
+
   @override
   String get offlineBannerTitle => 'সংযোগ নেই';
 

lib/l10n/gen/app_localizations_de.dart

@@ -751,6 +751,9 @@ class AppLocalizationsDe extends AppLocalizations {
   @override
   String get openFullPlayerTooltip => 'Vollständigen Player öffnen';
 
+  @override
+  String get nowListeningLabel => 'Läuft gerade';
+
   @override
   String get nothingPlayingTitle => 'Es läuft noch nichts';
 
@@ -790,6 +793,9 @@ class AppLocalizationsDe extends AppLocalizations {
   @override
   String get exploreNewSubtitle => 'Diese Woche';
 
+  @override
+  String get popularNowTitle => 'Jetzt beliebt';
+
   @override
   String get offlineBannerTitle => 'Keine Verbindung';
 

lib/l10n/gen/app_localizations_en.dart

@@ -744,6 +744,9 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get openFullPlayerTooltip => 'Open full player';
 
+  @override
+  String get nowListeningLabel => 'Now listening';
+
   @override
   String get nothingPlayingTitle => 'Nothing playing yet';
 
@@ -783,6 +786,9 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get exploreNewSubtitle => 'This week';
 
+  @override
+  String get popularNowTitle => 'Popular now';
+
   @override
   String get offlineBannerTitle => 'No connection';
 

lib/l10n/gen/app_localizations_es.dart

@@ -749,6 +749,9 @@ class AppLocalizationsEs extends AppLocalizations {
   @override
   String get openFullPlayerTooltip => 'Abrir reproductor completo';
 
+  @override
+  String get nowListeningLabel => 'Escuchando ahora';
+
   @override
   String get nothingPlayingTitle => 'Todavía no estás escuchando nada';
 
@@ -788,6 +791,9 @@ class AppLocalizationsEs extends AppLocalizations {
   @override
   String get exploreNewSubtitle => 'Esta semana';
 
+  @override
+  String get popularNowTitle => 'Populares ahora';
+
   @override
   String get offlineBannerTitle => 'Sin conexión';
 

lib/l10n/gen/app_localizations_fr.dart

@@ -753,6 +753,9 @@ class AppLocalizationsFr extends AppLocalizations {
   @override
   String get openFullPlayerTooltip => 'Ouvrir le lecteur complet';
 
+  @override
+  String get nowListeningLabel => 'En cours d\'écoute';
+
   @override
   String get nothingPlayingTitle => 'Rien n\'est en cours de lecture';
 
@@ -792,6 +795,9 @@ class AppLocalizationsFr extends AppLocalizations {
   @override
   String get exploreNewSubtitle => 'Cette semaine';
 
+  @override
+  String get popularNowTitle => 'Populaire maintenant';
+
   @override
   String get offlineBannerTitle => 'Aucune connexion';
 

lib/l10n/gen/app_localizations_hi.dart

@@ -745,6 +745,9 @@ class AppLocalizationsHi extends AppLocalizations {
   @override
   String get openFullPlayerTooltip => 'पूरा प्लेयर खोलें';
 
+  @override
+  String get nowListeningLabel => 'अभी सुन रहे हैं';
+
   @override
   String get nothingPlayingTitle => 'अभी तक कुछ नहीं चल रहा';
 
@@ -784,6 +787,9 @@ class AppLocalizationsHi extends AppLocalizations {
   @override
   String get exploreNewSubtitle => 'इस सप्ताह';
 
+  @override
+  String get popularNowTitle => 'अभी लोकप्रिय';
+
   @override
   String get offlineBannerTitle => 'कोई कनेक्शन नहीं';
 

lib/l10n/gen/app_localizations_id.dart

@@ -745,6 +745,9 @@ class AppLocalizationsId extends AppLocalizations {
   @override
   String get openFullPlayerTooltip => 'Buka pemutar lengkap';
 
+  @override
+  String get nowListeningLabel => 'Sedang mendengarkan';
+
   @override
   String get nothingPlayingTitle => 'Belum ada yang diputar';
 
@@ -784,6 +787,9 @@ class AppLocalizationsId extends AppLocalizations {
   @override
   String get exploreNewSubtitle => 'Minggu ini';
 
+  @override
+  String get popularNowTitle => 'Populer sekarang';
+
   @override
   String get offlineBannerTitle => 'Tidak ada koneksi';
 

lib/l10n/gen/app_localizations_it.dart

@@ -751,6 +751,9 @@ class AppLocalizationsIt extends AppLocalizations {
   @override
   String get openFullPlayerTooltip => 'Apri il player completo';
 
+  @override
+  String get nowListeningLabel => 'In ascolto ora';
+
   @override
   String get nothingPlayingTitle => 'Non stai ancora ascoltando nulla';
 
@@ -790,6 +793,9 @@ class AppLocalizationsIt extends AppLocalizations {
   @override
   String get exploreNewSubtitle => 'Questa settimana';
 
+  @override
+  String get popularNowTitle => 'Popolari ora';
+
   @override
   String get offlineBannerTitle => 'Nessuna connessione';
 

lib/l10n/gen/app_localizations_ja.dart

@@ -720,6 +720,9 @@ class AppLocalizationsJa extends AppLocalizations {
   @override
   String get openFullPlayerTooltip => 'フルプレーヤーを開く';
 
+  @override
+  String get nowListeningLabel => '再生中';
+
   @override
   String get nothingPlayingTitle => 'まだ何も再生されていません';
 
@@ -758,6 +761,9 @@ class AppLocalizationsJa extends AppLocalizations {
   @override
   String get exploreNewSubtitle => '今週';
 
+  @override
+  String get popularNowTitle => '今人気';
+
   @override
   String get offlineBannerTitle => '接続なし';
 

lib/l10n/gen/app_localizations_pt.dart

@@ -748,6 +748,9 @@ class AppLocalizationsPt extends AppLocalizations {
   @override
   String get openFullPlayerTooltip => 'Abrir player completo';
 
+  @override
+  String get nowListeningLabel => 'Ouvindo agora';
+
   @override
   String get nothingPlayingTitle => 'Ainda não há nada tocando';
 
@@ -787,6 +790,9 @@ class AppLocalizationsPt extends AppLocalizations {
   @override
   String get exploreNewSubtitle => 'Nesta semana';
 
+  @override
+  String get popularNowTitle => 'Populares agora';
+
   @override
   String get offlineBannerTitle => 'Sem conexão';
 

lib/l10n/gen/app_localizations_ru.dart

@@ -749,6 +749,9 @@ class AppLocalizationsRu extends AppLocalizations {
   @override
   String get openFullPlayerTooltip => 'Открыть полный плеер';
 
+  @override
+  String get nowListeningLabel => 'Сейчас слушаете';
+
   @override
   String get nothingPlayingTitle => 'Пока ничего не воспроизводится';
 
@@ -788,6 +791,9 @@ class AppLocalizationsRu extends AppLocalizations {
   @override
   String get exploreNewSubtitle => 'На этой неделе';
 
+  @override
+  String get popularNowTitle => 'Популярно сейчас';
+
   @override
   String get offlineBannerTitle => 'Нет подключения';
 

lib/l10n/gen/app_localizations_zh.dart

@@ -717,6 +717,9 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get openFullPlayerTooltip => '打开完整播放器';
 
+  @override
+  String get nowListeningLabel => '正在收听';
+
   @override
   String get nothingPlayingTitle => '目前没有正在播放的内容';
 
@@ -755,6 +758,9 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get exploreNewSubtitle => '本周';
 
+  @override
+  String get popularNowTitle => '当前热门';
+
   @override
   String get offlineBannerTitle => '无连接';
 

lib/pantallas/pantalla_inicio.dart

@@ -14,7 +14,6 @@ import '../tema/pluriwave_theme.dart';
 import '../widgets/pluri_glass_surface.dart';
 import '../widgets/pluri_layout.dart';
 import '../widgets/pluri_premium_widgets.dart';
-import '../widgets/pluri_root_header.dart';
 import '../widgets/pluri_sleep_timer_sheet.dart';
 import '../widgets/visualizador_audio.dart';
 
@@ -38,35 +37,46 @@ class _PantallaInicioState extends State<PantallaInicio> {
     final theme = Theme.of(context);
     final l10n = AppLocalizations.of(context);
 
-    return CustomScrollView(
+    // Audit 1.1 (t4 lines 49-51): a full-bleed art/gradient/noise wash sits
-      slivers: [
+    // BEHIND the whole screen, not just inside the hero card -- the Stack
-        // S1 (Tier 1 visual fidelity): the prototype has no global AppBar —
+    // wrapper is new; everything that used to be the bare CustomScrollView
-        // this root now draws its own 56px title row instead of relying on
+    // return value is unchanged below.
-        // app.dart's removed shared chrome (which is also where the
+    return Stack(
-        // sleep-timer action used to live).
+      fit: StackFit.expand,
-        SliverToBoxAdapter(
+      children: [
-          child: PluriRootHeader(
+        const _FondoEscuchar(),
-            title: l10n.navHome,
+        CustomScrollView(
-            onSleepTimer: () => showPluriSleepTimerSheet(context),
+          slivers: [
-          ),
+            // Audit 1.2 (t4 line 53): unlike the other 3 roots' plain 56px
-        ),
+            // PluriRootHeader, Escuchar's own header is a 52px "Now
-        // WU5 built the hero; WU6 relocated the discovery sections that
+            // listening" eyebrow row -- the tab bar already identifies this
-        // used to follow it (_seccionCercanas, _seccionTendencias,
+            // destination, so it never repeats "Escuchar" as a title.
-        // _chipGeneros, _errorBanner, the browse grid) into
+            SliverToBoxAdapter(
-        // PantallaBuscar's landing state and DELETED them here (this WU's
+              child: _CabeceraEscuchar(
-        // own task 6.5 — completing WU5's task 5.9 deferral). Escuchar's
+                onSleepTimer: () => showPluriSleepTimerSheet(context),
-        // content is now just the hero and the favorites preview below;
+              ),
-        // pull-to-refresh was dropped along with the grid it refreshed —
+            ),
-        // the retry button that used to live in the (now relocated) error
+            // WU5 built the hero; WU6 relocated the discovery sections that
-        // banner already covers manual recovery on Buscar.
+            // used to follow it (_seccionCercanas, _seccionTendencias,
-        const SliverToBoxAdapter(child: _EscucharHero()),
+            // _chipGeneros, _errorBanner, the browse grid) into
-        SliverToBoxAdapter(child: _seccionTusEmisoras(context, theme, l10n)),
+            // PantallaBuscar's landing state and DELETED them here (this WU's
-        // ADR-7(b): the mini player is hidden on this whole screen
+            // own task 6.5 — completing WU5's task 5.9 deferral). Escuchar's
-        // (app.dart), so its content needs less bottom padding than every
+            // content is now just the hero and the favorites preview below;
-        // other root — escucharBottomChromeInset, not the plain
+            // pull-to-refresh was dropped along with the grid it refreshed —
-        // bottomChromeInset every other root/scrollable uses.
+            // the retry button that used to live in the (now relocated) error
-        const SliverToBoxAdapter(
+            // banner already covers manual recovery on Buscar.
-          child: SizedBox(height: PluriLayout.escucharBottomChromeInset),
+            const SliverToBoxAdapter(child: _EscucharHero()),
+            SliverToBoxAdapter(
+              child: _seccionTusEmisoras(context, theme, l10n),
+            ),
+            // ADR-7(b): the mini player is hidden on this whole screen
+            // (app.dart), so its content needs less bottom padding than every
+            // other root — escucharBottomChromeInset, not the plain
+            // bottomChromeInset every other root/scrollable uses.
+            const SliverToBoxAdapter(
+              child: SizedBox(height: PluriLayout.escucharBottomChromeInset),
+            ),
+          ],
         ),
       ],
     );
@@ -112,9 +122,10 @@ class _PantallaInicioState extends State<PantallaInicio> {
                       Flexible(
                         child: Text(
                           l10n.yourStationsTitle,
-                          style: theme.textTheme.titleMedium?.copyWith(
+                          // S7 (visual fidelity, t4 line 80): the in-page
-                            fontWeight: FontWeight.w900,
+                          // section heading style (15/w800/ls-.2), not
-                          ),
+                          // titleMedium(16)/w900.
+                          style: context.pluriType.inPageSectionHeading,
                           overflow: TextOverflow.ellipsis,
                         ),
                       ),
@@ -187,6 +198,134 @@ class _PantallaInicioState extends State<PantallaInicio> {
   }
 }
 
+/// Audit 1.1 (t4 lines 49-51): a full-bleed backdrop behind the ENTIRE
+/// screen -- 400px of the current station's own art at 50% opacity, a
+/// gradient fading it into the page background by 430px, and a faint noise
+/// texture. Reads `emisoraActual` ITSELF (not a parent watch), so this stays
+/// the only new subscriber -- `_PantallaInicioState.build()` keeps its
+/// documented S4-R5 "no root watch" rule. Renders the gradient/noise even
+/// with nothing playing (there is simply no image layer to show then) so
+/// the page keeps the same base depth in every state.
+class _FondoEscuchar extends StatelessWidget {
+  const _FondoEscuchar();
+
+  static const double _altoArte = 400;
+  static const double _altoDegradado = 430;
+
+  @override
+  Widget build(BuildContext context) {
+    final emisora = context.select<EstadoRadio, Emisora?>(
+      (e) => e.emisoraActual,
+    );
+    final tokens = context.pluriTokens;
+    final favicon = emisora?.favicon;
+
+    return IgnorePointer(
+      key: const ValueKey('escuchar-background-art'),
+      child: Stack(
+        children: [
+          if (favicon != null && favicon.isNotEmpty)
+            SizedBox(
+              width: double.infinity,
+              height: _altoArte,
+              child: Opacity(
+                opacity: 0.5,
+                child: CachedNetworkImage(
+                  imageUrl: favicon,
+                  fit: BoxFit.cover,
+                  errorWidget: (_, __, ___) => const SizedBox.shrink(),
+                ),
+              ),
+            ),
+          SizedBox(
+            width: double.infinity,
+            height: _altoDegradado,
+            child: DecoratedBox(
+              decoration: BoxDecoration(
+                gradient: LinearGradient(
+                  begin: Alignment.topCenter,
+                  end: Alignment.bottomCenter,
+                  colors: [
+                    tokens.deepViolet.withValues(alpha: 0.4),
+                    tokens.deepViolet.withValues(alpha: 0.86),
+                    tokens.deepViolet,
+                  ],
+                  stops: const [0, 0.58, 1],
+                ),
+              ),
+            ),
+          ),
+          SizedBox(
+            width: double.infinity,
+            height: _altoDegradado,
+            child: Opacity(
+              opacity: 0.05,
+              child: Image.asset(
+                'assets/images/noise_soft.png',
+                fit: BoxFit.cover,
+                errorBuilder: (_, __, ___) => const SizedBox.shrink(),
+              ),
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}
+
+/// Audit 1.2 (t4 line 53): Escuchar's own header -- 52px, an eyebrow-styled
+/// "Now listening" label (not a screen title -- the tab bar already
+/// identifies this destination) and a single trailing action.
+///
+/// The prototype also draws a `cast` icon here. This app has no casting
+/// service anywhere in `lib/servicios` (checked before writing this) --
+/// inventing a Chromecast-style button with no backing capability would fail
+/// the same "don't invent a capability absent from the domain" test WU5/WU9
+/// already established elsewhere in this app, so it is omitted, not faked.
+/// The ONE real action this row keeps is the sleep timer, which used to be
+/// [PluriRootHeader]'s bedtime button on this exact screen.
+class _CabeceraEscuchar extends StatelessWidget {
+  const _CabeceraEscuchar({required this.onSleepTimer});
+
+  final VoidCallback onSleepTimer;
+
+  static const double altura = 52;
+
+  @override
+  Widget build(BuildContext context) {
+    final l10n = AppLocalizations.of(context);
+    return SizedBox(
+      height: altura,
+      child: Padding(
+        padding: const EdgeInsets.fromLTRB(20, 0, 10, 0),
+        child: Row(
+          children: [
+            Expanded(
+              child: Text(
+                l10n.nowListeningLabel,
+                maxLines: 1,
+                overflow: TextOverflow.ellipsis,
+                style: TextStyle(
+                  fontSize: 15,
+                  fontWeight: FontWeight.w800,
+                  letterSpacing: 0.3,
+                  color: const Color(0xFFF2F7FA).withValues(alpha: 0.55),
+                ),
+              ),
+            ),
+            IconButton(
+              icon: const Icon(Icons.bedtime_outlined),
+              iconSize: 23,
+              tooltip: l10n.sleepTimer,
+              onPressed: onSleepTimer,
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
 /// WU5, design ADR-7: the Escuchar embedded player. `EstadoRadio` is the
 /// single source of truth (`emisoraActual` already feeds `MiniReproductor`
 /// and `PantallaReproductor`) — this hero is a third VIEW, never a third
@@ -292,8 +431,14 @@ class _EscucharHero extends StatelessWidget {
                       const SizedBox(height: 6),
                       Text(
                         stationName,
+                        // Audit 1.5 (t4 line 60): 24/w800/ls-.5/height 1.12
+                        // -- titleLarge is 22 with neither letter-spacing
+                        // nor an explicit line height.
                         style: theme.textTheme.titleLarge?.copyWith(
+                          fontSize: 24,
                           fontWeight: FontWeight.w800,
+                          letterSpacing: -0.5,
+                          height: 1.12,
                         ),
                         maxLines: 2,
                         overflow: TextOverflow.ellipsis,
@@ -334,12 +479,55 @@ class _EscucharHero extends StatelessWidget {
             const SizedBox(height: 14),
             _FilaTransporteEscuchar(emisora: emisora),
             const SizedBox(height: 10),
-            Align(
+            // Audit 1.9 (t4 line 78): a CENTRED pill -- padding:9px 15px,
-              alignment: Alignment.centerLeft,
+            // radius:999, rgba(255,255,255,.07) + border .1, 12px/w700,
-              child: OutlinedButton.icon(
+            // icon expand_less 17px -- not a left-aligned OutlinedButton
-                icon: const Icon(Icons.tune_rounded, size: 18),
+            // with tune_rounded at 18px.
-                label: Text(l10n.openFullPlayerTooltip),
+            Center(
-                onPressed: () => PantallaReproductor.abrir(context, emisora),
+              child: Material(
+                type: MaterialType.transparency,
+                child: InkWell(
+                  borderRadius: BorderRadius.circular(999),
+                  onTap: () => PantallaReproductor.abrir(context, emisora),
+                  child: DecoratedBox(
+                    decoration: BoxDecoration(
+                      color: Colors.white.withValues(alpha: 0.07),
+                      borderRadius: BorderRadius.circular(999),
+                      border: Border.all(
+                        color: Colors.white.withValues(alpha: 0.1),
+                      ),
+                    ),
+                    child: Padding(
+                      padding: const EdgeInsets.symmetric(
+                        horizontal: 15,
+                        vertical: 9,
+                      ),
+                      child: Row(
+                        mainAxisSize: MainAxisSize.min,
+                        children: [
+                          Icon(
+                            Icons.expand_less_rounded,
+                            size: 17,
+                            color: theme.colorScheme.onSurface.withValues(
+                              alpha: 0.78,
+                            ),
+                          ),
+                          const SizedBox(width: 6),
+                          Text(
+                            l10n.openFullPlayerTooltip,
+                            style: TextStyle(
+                              fontSize: 12,
+                              fontWeight: FontWeight.w700,
+                              color: theme.colorScheme.onSurface.withValues(
+                                alpha: 0.78,
+                              ),
+                            ),
+                          ),
+                        ],
+                      ),
+                    ),
+                  ),
+                ),
               ),
             ),
           ],
@@ -474,8 +662,10 @@ class _FilaTransporteEscuchar extends StatelessWidget {
                 s == EstadoReproduccion.cargando ||
                 s == EstadoReproduccion.reconectando;
             return SizedBox(
-              width: 56,
+              // Audit 1.8 (t4 line 73): 72x72 with a 38px icon, not 56x56
-              height: 56,
+              // with a 28px icon.
+              width: 72,
+              height: 72,
               child: FilledButton(
                 style: FilledButton.styleFrom(
                   shape: const CircleBorder(),
@@ -503,7 +693,7 @@ class _FilaTransporteEscuchar extends StatelessWidget {
                           reproduciendo
                               ? Icons.pause_rounded
                               : Icons.play_arrow_rounded,
-                          size: 28,
+                          size: 38,
                         ),
               ),
             );

lib/pantallas/pantalla_reproductor.dart

@@ -1,3 +1,5 @@
+import 'dart:ui';
+
 import 'package:cached_network_image/cached_network_image.dart';
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
@@ -13,6 +15,7 @@ import '../servicios/servicio_audio.dart';
 import '../servicios/servicio_timer.dart';
 import '../tema/pluri_animate.dart';
 import '../tema/pluriwave_theme.dart';
+import '../tema/pluriwave_tokens.dart';
 import '../widgets/ecualizador_widget.dart';
 import '../widgets/pluri_glass_surface.dart';
 import '../widgets/pluri_premium_widgets.dart';
@@ -117,83 +120,110 @@ class _PantallaReproductorState extends State<PantallaReproductor> {
           );
         },
       ),
-      body: SafeArea(
+      // Audit 2.2 (t4 lines 108-109): a full-bleed blurred backdrop of the
-        child: SingleChildScrollView(
+      // station's own art sits BEHIND the scrollable content -- the Stack
-          padding: const EdgeInsets.fromLTRB(20, 8, 20, 24),
+      // wrapper is new; the SafeArea/SingleChildScrollView subtree below is
-          child: Column(
+      // unchanged.
-            children: [
+      body: Stack(
-              _ArteReproductor(
+        fit: StackFit.expand,
-                emisora: emisoraActiva,
+        children: [
-                estadoStream: estado.estadoStream,
+          _FondoReproductor(emisora: emisoraActiva, tokens: tokens),
-              ).pluriScaleIn(
+          SafeArea(
-                context,
+            child: SingleChildScrollView(
-                begin: 0.86,
+              padding: const EdgeInsets.fromLTRB(20, 8, 20, 24),
-                duration: const Duration(milliseconds: 420),
+              child: Column(
-                curve: Curves.easeOutBack,
+                children: [
+                  _ArteReproductor(
+                    emisora: emisoraActiva,
+                    estadoStream: estado.estadoStream,
+                  ).pluriScaleIn(
+                    context,
+                    begin: 0.86,
+                    duration: const Duration(milliseconds: 420),
+                    curve: Curves.easeOutBack,
+                  ),
+                  const SizedBox(height: 18),
+                  Text(
+                    emisoraActiva.nombre,
+                    // Audit 2.3 (t4 line 116): 26/w800/ls-.5/height 1.15 --
+                    // headlineSmall is 24/w700 with neither letter-spacing
+                    // nor an explicit line height.
+                    style: theme.textTheme.headlineSmall?.copyWith(
+                      fontSize: 26,
+                      fontWeight: FontWeight.w800,
+                      letterSpacing: -0.5,
+                      height: 1.15,
+                    ),
+                    textAlign: TextAlign.center,
+                    maxLines: 2,
+                    overflow: TextOverflow.ellipsis,
+                  ).pluriFadeIn(
+                    context,
+                    delay: const Duration(milliseconds: 150),
+                  ),
+                  const SizedBox(height: 6),
+                  _SubtituloInfo(emisora: emisoraActiva).pluriFadeIn(
+                    context,
+                    delay: const Duration(milliseconds: 190),
+                  ),
+                  const SizedBox(height: 14),
+                  // Audit 2.10 (t4 lines 120-122): the bars sit directly on
+                  // the background -- no wrapping glass card. The key moves
+                  // from the (removed) PluriGlassSurface onto the
+                  // visualizer itself so existing finders keep working.
+                  VisualizadorAudio(
+                    key: const Key('player-visualizer'),
+                    estadoStream: estado.estadoStream,
+                    androidAudioSessionIdStream:
+                        estado.audio.androidAudioSessionIdStream,
+                    // Audit 2.5 (t4 lines 120-122): 30 discrete bars at
+                    // 40px, gradient ending at 45% alpha (not the hero's
+                    // 30%).
+                    barras: 30,
+                    color: tokens.warmCoral,
+                    altura: 40,
+                    barrasDiscretas: true,
+                    gradienteFinAlpha: 0.45,
+                  ).pluriFadeIn(
+                    context,
+                    delay: const Duration(milliseconds: 270),
+                  ),
+                  const SizedBox(height: 22),
+                  _Controles(
+                    estado: estado,
+                    emisora: emisoraActiva,
+                    esFavorito: esFavorito,
+                  ).pluriFadeSlideIn(
+                    context,
+                    delay: const Duration(milliseconds: 310),
+                    beginY: 0.3,
+                  ),
+                  const SizedBox(height: 20),
+                  _BandejaHerramientas(
+                    estado: estado,
+                    eq: eq,
+                    emisora: emisoraActiva,
+                    compartir: _compartir,
+                  ).pluriFadeIn(
+                    context,
+                    delay: const Duration(milliseconds: 350),
+                  ),
+                  const SizedBox(height: 12),
+                  // Item 26 / audit 2.4 (t4:114-140): the quality row is
+                  // LAST, after the tool tray -- it used to sit right after
+                  // the subtitle, 4 positions too early.
+                  _FilaCalidad(
+                    estado: estado,
+                    emisora: emisoraActiva,
+                  ).pluriFadeIn(
+                    context,
+                    delay: const Duration(milliseconds: 390),
+                  ),
+                ],
               ),
-              const SizedBox(height: 18),
+            ),
-              Text(
-                emisoraActiva.nombre,
-                style: theme.textTheme.headlineSmall?.copyWith(
-                  fontWeight: FontWeight.w700,
-                ),
-                textAlign: TextAlign.center,
-                maxLines: 2,
-                overflow: TextOverflow.ellipsis,
-              ).pluriFadeIn(context, delay: const Duration(milliseconds: 150)),
-              const SizedBox(height: 6),
-              _SubtituloInfo(
-                emisora: emisoraActiva,
-              ).pluriFadeIn(context, delay: const Duration(milliseconds: 190)),
-              const SizedBox(height: 14),
-              PluriGlassSurface(
-                key: const Key('player-visualizer'),
-                borderRadius: BorderRadius.circular(tokens.radiusLg),
-                padding: const EdgeInsets.symmetric(
-                  horizontal: 14,
-                  vertical: 12,
-                ),
-                child: VisualizadorAudio(
-                  estadoStream: estado.estadoStream,
-                  androidAudioSessionIdStream:
-                      estado.audio.androidAudioSessionIdStream,
-                  // Audit 2.5 (t4 lines 120-122): 30 discrete bars at 40px,
-                  // gradient ending at 45% alpha (not the hero's 30%).
-                  barras: 30,
-                  color: tokens.warmCoral,
-                  altura: 40,
-                  barrasDiscretas: true,
-                  gradienteFinAlpha: 0.45,
-                ),
-              ).pluriFadeIn(context, delay: const Duration(milliseconds: 270)),
-              const SizedBox(height: 22),
-              _Controles(
-                estado: estado,
-                emisora: emisoraActiva,
-                esFavorito: esFavorito,
-              ).pluriFadeSlideIn(
-                context,
-                delay: const Duration(milliseconds: 310),
-                beginY: 0.3,
-              ),
-              const SizedBox(height: 20),
-              _BandejaHerramientas(
-                estado: estado,
-                eq: eq,
-                emisora: emisoraActiva,
-                compartir: _compartir,
-              ).pluriFadeIn(context, delay: const Duration(milliseconds: 350)),
-              const SizedBox(height: 12),
-              // Item 26 / audit 2.4 (t4:114-140): the quality row is LAST,
-              // after the tool tray -- it used to sit right after the
-              // subtitle, 4 positions too early.
-              _FilaCalidad(
-                estado: estado,
-                emisora: emisoraActiva,
-              ).pluriFadeIn(context, delay: const Duration(milliseconds: 390)),
-            ],
           ),
-        ),
+        ],
       ),
     );
   }
@@ -201,25 +231,32 @@ class _PantallaReproductorState extends State<PantallaReproductor> {
 
 /// Square art (design proposal WU14 row: "square art" replaces the old
 /// circular `_WaveHero`). Loading/error overlays and the fallback icon are
-/// unchanged from the prior circular version — only the clip shape and the
+/// unchanged from the prior circular version.
-/// decorative halo geometry changed from circle to rounded-square.
+///
+/// Audit 2.1 (t4 line 114): the prototype draws a FIXED 246x246 square,
+/// radius 28, with only a drop shadow -- no halo, no ring. The previous
+/// `width*0.62`-derived size plus a radial-gradient halo Container and a
+/// bordered ring Container (neither present in the prototype) are both
+/// removed; `_radio` (28) is deliberately its own constant, distinct from
+/// every named token radius, mirroring this codebase's established
+/// one-off-radius precedent (e.g. the ringing screen's stop button).
 class _ArteReproductor extends StatelessWidget {
   final Emisora emisora;
   final Stream<EstadoReproduccion> estadoStream;
 
   const _ArteReproductor({required this.emisora, required this.estadoStream});
 
+  static const double _lado = 246;
+  static const double _radio = 28;
+
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
-    final t = context.pluriTokens;
+    final radio = BorderRadius.circular(_radio);
-    final size = MediaQuery.of(context).size.width * 0.62;
-    final radio = BorderRadius.circular(t.radiusLg);
 
     return StreamBuilder<EstadoReproduccion>(
       stream: estadoStream,
       builder: (context, snapshot) {
-        final reproduciendo = snapshot.data == EstadoReproduccion.reproduciendo;
         // S7-R3: reconectando renders as loading, never as error.
         final cargando =
             snapshot.data == EstadoReproduccion.cargando ||
@@ -228,83 +265,62 @@ class _ArteReproductor extends StatelessWidget {
 
         return SizedBox(
           key: const Key('player-hero-art'),
-          width: size + 40,
+          width: _lado,
-          height: size + 40,
+          height: _lado,
-          child: Stack(
+          child: DecoratedBox(
-            alignment: Alignment.center,
+            decoration: BoxDecoration(
-            children: [
+              borderRadius: radio,
-              Container(
+              boxShadow: [
-                width: size + 34,
+                BoxShadow(
-                height: size + 34,
+                  color: Colors.black.withValues(alpha: 0.55),
-                decoration: BoxDecoration(
+                  blurRadius: 60,
-                  borderRadius: BorderRadius.circular(t.radiusLg + 16),
+                  offset: const Offset(0, 26),
-                  gradient: RadialGradient(
-                    colors: [
-                      t.electricMagenta.withValues(
-                        alpha: reproduciendo ? 0.35 : 0.18,
-                      ),
-                      t.deepViolet.withValues(alpha: 0.0),
-                    ],
-                  ),
                 ),
-              ),
+              ],
-              Container(
+            ),
-                width: size + 12,
+            child: PluriGlassSurface(
-                height: size + 12,
+              borderRadius: radio,
-                decoration: BoxDecoration(
+              padding: EdgeInsets.zero,
-                  borderRadius: BorderRadius.circular(t.radiusLg + 4),
+              child: ClipRRect(
-                  border: Border.all(color: t.glassBorder),
-                ),
-              ),
-              PluriGlassSurface(
                 borderRadius: radio,
-                padding: EdgeInsets.zero,
+                child: Stack(
-                child: SizedBox(
+                  fit: StackFit.expand,
-                  width: size,
+                  children: [
-                  height: size,
+                    if (emisora.favicon != null && emisora.favicon!.isNotEmpty)
-                  child: ClipRRect(
+                      CachedNetworkImage(
-                    borderRadius: radio,
+                        imageUrl: emisora.favicon!,
-                    child: Stack(
+                        fit: BoxFit.cover,
-                      fit: StackFit.expand,
+                        placeholder: (_, __) => _shimmer(theme),
-                      children: [
+                        errorWidget: (_, __, ___) => _iconoFallback(theme),
-                        if (emisora.favicon != null &&
+                      )
-                            emisora.favicon!.isNotEmpty)
+                    else
-                          CachedNetworkImage(
+                      _iconoFallback(theme),
-                            imageUrl: emisora.favicon!,
+                    if (cargando)
-                            fit: BoxFit.cover,
+                      Container(
-                            placeholder: (_, __) => _shimmer(theme),
+                        color: Colors.black45,
-                            errorWidget: (_, __, ___) => _iconoFallback(theme),
+                        child: Center(
-                          )
+                          child: CircularProgressIndicator(
-                        else
+                            color: theme.colorScheme.onSurface,
-                          _iconoFallback(theme),
+                          ),
-                        if (cargando)
+                        ),
-                          Container(
+                      ),
-                            color: Colors.black45,
+                    if (hayError)
-                            child: Center(
+                      Container(
-                              child: CircularProgressIndicator(
+                        color: Colors.black54,
-                                color: theme.colorScheme.onSurface,
+                        child: Center(
-                              ),
+                          child: Icon(
+                            Icons.wifi_off_rounded,
+                            size: 56,
+                            color: theme.colorScheme.onSurface.withValues(
+                              alpha: 0.85,
                             ),
                           ),
-                        if (hayError)
+                        ),
-                          Container(
+                      ),
-                            color: Colors.black54,
+                  ],
-                            child: Center(
-                              child: Icon(
-                                Icons.wifi_off_rounded,
-                                size: 56,
-                                color: theme.colorScheme.onSurface.withValues(
-                                  alpha: 0.85,
-                                ),
-                              ),
-                            ),
-                          ),
-                      ],
-                    ),
-                  ),
                 ),
               ),
-            ],
+            ),
           ),
         );
       },
@@ -327,6 +343,63 @@ class _ArteReproductor extends StatelessWidget {
   );
 }
 
+/// Audit 2.2 (t4 lines 108-109): a full-bleed blurred backdrop of the
+/// CURRENT station's own art, sitting behind the whole screen. Unlike the
+/// ringing screen's `_FondoArteDifuminado` (which cannot use
+/// `Emisora.favicon` -- a cold-boot download after a screen-off wake would
+/// hang widget tests without a mocked `HttpClient`), this screen already
+/// renders `emisora.favicon` via `CachedNetworkImage` for its OWN foreground
+/// art (`_ArteReproductor` above) with no such hazard -- reusing it here for
+/// the backdrop is equally safe. Renders the gradient tint even without a
+/// favicon, so the page keeps the same base depth in every state.
+class _FondoReproductor extends StatelessWidget {
+  const _FondoReproductor({required this.emisora, required this.tokens});
+
+  final Emisora emisora;
+  final PluriWaveTokens tokens;
+
+  @override
+  Widget build(BuildContext context) {
+    final favicon = emisora.favicon;
+    return Positioned.fill(
+      key: const ValueKey('player-background-art'),
+      child: IgnorePointer(
+        child: Stack(
+          fit: StackFit.expand,
+          children: [
+            if (favicon != null && favicon.isNotEmpty)
+              ImageFiltered(
+                imageFilter: ImageFilter.blur(sigmaX: 26, sigmaY: 26),
+                child: Opacity(
+                  opacity: 0.45,
+                  child: CachedNetworkImage(
+                    imageUrl: favicon,
+                    fit: BoxFit.cover,
+                    errorWidget: (_, __, ___) => const SizedBox.shrink(),
+                  ),
+                ),
+              ),
+            DecoratedBox(
+              decoration: BoxDecoration(
+                gradient: LinearGradient(
+                  begin: Alignment.topCenter,
+                  end: Alignment.bottomCenter,
+                  colors: [
+                    tokens.deepViolet.withValues(alpha: 0.55),
+                    tokens.deepViolet.withValues(alpha: 0.9),
+                    tokens.deepViolet,
+                  ],
+                  stops: const [0, 0.46, 1],
+                ),
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
 /// Single subtitle line (WU14: collapses the old `_InfoChips` `Wrap` of
 /// separate chips — country/language now join as one line; codec/bitrate
 /// moved into their own [_FilaCalidad] row below).
@@ -755,9 +828,10 @@ class _Controles extends StatelessWidget {
           );
         }
 
-        return PluriGlassSurface(
+        // Audit 2.9 (t4 lines 124-131): the transport row sits directly on
-          borderRadius: BorderRadius.circular(28),
+        // the background -- the prototype draws no wrapping card here.
-          padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 10),
+        return Padding(
+          padding: const EdgeInsets.symmetric(vertical: 10),
           child: Row(
             mainAxisAlignment: MainAxisAlignment.spaceEvenly,
             children: [
@@ -874,6 +948,13 @@ class _Controles extends StatelessWidget {
 /// One tile of the 4-tile tool tray (WU14: EQ propio / Grabar / sleep timer
 /// / Compartir), each opening its own bottom sheet (Compartir invokes
 /// directly instead — there is no sheet content for it).
+///
+/// Audit 2.8 (t4 lines 133-136): only the FIRST tile ("EQ propio") is
+/// accented -- tinted background/border, brand-colour icon, bold brand
+/// label. The other three share a neutral OPAQUE surface (not `listSurface`
+/// at 55% alpha) with a full-weight icon/label -- this app's ambient
+/// default colour, not the `tokens.electricMagenta` fallback every tile
+/// used to render in regardless of [accent].
 class _TileHerramienta extends StatelessWidget {
   const _TileHerramienta({
     super.key,
@@ -881,6 +962,7 @@ class _TileHerramienta extends StatelessWidget {
     required this.label,
     required this.onTap,
     this.iconColor,
+    this.accent = false,
   });
 
   final IconData icon;
@@ -888,26 +970,42 @@ class _TileHerramienta extends StatelessWidget {
   final VoidCallback onTap;
   final Color? iconColor;
 
+  /// See class doc — `false` (neutral) is every tile except "EQ propio".
+  final bool accent;
+
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
     final tokens = context.pluriTokens;
+    final resolvedIconColor =
+        iconColor ?? (accent ? tokens.electricMagenta : null);
 
     return Material(
       type: MaterialType.transparency,
       child: InkWell(
-        borderRadius: BorderRadius.circular(tokens.radiusSm),
+        borderRadius: BorderRadius.circular(tokens.radiusMd),
         onTap: onTap,
         child: Container(
           padding: const EdgeInsets.symmetric(vertical: 14, horizontal: 6),
           decoration: BoxDecoration(
-            color: tokens.listSurface.withValues(alpha: 0.55),
+            color:
-            borderRadius: BorderRadius.circular(tokens.radiusSm),
+                accent
+                    ? tokens.electricMagenta.withValues(alpha: 0.16)
+                    : tokens.listSurface,
+            // Audit 2.8 (t4 lines 133-136): radius 18 for BOTH variants --
+            // `radiusMd`, not the smaller `radiusSm` every tile used before.
+            borderRadius: BorderRadius.circular(tokens.radiusMd),
+            border: Border.all(
+              color:
+                  accent
+                      ? tokens.electricMagenta.withValues(alpha: 0.4)
+                      : Colors.white.withValues(alpha: 0.09),
+            ),
           ),
           child: Column(
             mainAxisSize: MainAxisSize.min,
             children: [
-              Icon(icon, size: 23, color: iconColor ?? tokens.electricMagenta),
+              Icon(icon, size: 23, color: resolvedIconColor),
               const SizedBox(height: 5),
               Text(
                 label,
@@ -915,7 +1013,11 @@ class _TileHerramienta extends StatelessWidget {
                 overflow: TextOverflow.ellipsis,
                 textAlign: TextAlign.center,
                 style: theme.textTheme.labelSmall?.copyWith(
-                  fontWeight: FontWeight.w800,
+                  fontWeight: accent ? FontWeight.w800 : FontWeight.w700,
+                  color:
+                      accent
+                          ? tokens.electricMagenta
+                          : theme.colorScheme.onSurface.withValues(alpha: 0.72),
                 ),
               ),
             ],
@@ -952,6 +1054,7 @@ class _BandejaHerramientas extends StatelessWidget {
             icon: Icons.equalizer_rounded,
             label: l10n.playerToolEqLabel,
             onTap: () => _mostrarHojaEq(context, eq, emisora),
+            accent: true,
           ),
         ),
         const SizedBox(width: 10),

lib/tema/pluriwave_typography.dart

@@ -2,8 +2,11 @@ import 'package:flutter/material.dart';
 
 /// Design ADR-1: the named type scale, split out of [PluriWaveTokens] into
 /// its own ThemeExtension so screens stop copy-pasting
-/// `.copyWith(fontWeight: w900, letterSpacing: …)`. The set is closed at six
+/// `.copyWith(fontWeight: w900, letterSpacing: …)`. The set was closed at
-/// styles — a seventh requires amending ADR-1.
+/// six styles; S7 (visual fidelity pass) amended ADR-1 to add a seventh —
+/// [inPageSectionHeading] — rather than have four screens each keep
+/// copy-pasting their own `titleMedium.copyWith(fontWeight: w900)` override,
+/// the exact duplication this extension exists to eliminate.
 ///
 /// [eyebrowLabel] never applies `toUpperCase()` — casing is a
 /// locale-hostile transform (Turkish dotless i, and scripts with no case at
@@ -18,6 +21,7 @@ class PluriWaveTypography extends ThemeExtension<PluriWaveTypography> {
     required this.cardTitle,
     required this.bodyStrong,
     required this.eyebrowLabel,
+    required this.inPageSectionHeading,
   });
 
   /// 88 / w800 / height 1.0 / ls -2.0. Alarm ringing, inline time editor.
@@ -41,6 +45,14 @@ class PluriWaveTypography extends ThemeExtension<PluriWaveTypography> {
   /// headers.
   final TextStyle eyebrowLabel;
 
+  /// 15 / w800 / ls -0.2. S7 (visual fidelity, t4 lines 80, 153, 164, 173):
+  /// an in-page section heading living directly on a screen's content —
+  /// "Tus emisoras", "Cerca de ti", "Explorar por", "Populares ahora".
+  /// Distinct from both [sectionTitle] (23, a ROOT screen's own title) and
+  /// [screenTitle] (19, a pushed screen's AppBar title) — this is smaller
+  /// than either, for a heading living one level below the screen itself.
+  final TextStyle inPageSectionHeading;
+
   /// Builds the scale from [family] — the SAME resolved Google Fonts
   /// TextTheme instance [PluriWaveTheme.dark] already computes. Building the
   /// styles anywhere else would re-merge the font family, which is the
@@ -79,6 +91,7 @@ class PluriWaveTypography extends ThemeExtension<PluriWaveTypography> {
         letterSpacing: 0.8,
         color: const Color(0xFFF2F7FA).withValues(alpha: 0.42),
       ),
+      inPageSectionHeading: style(15, FontWeight.w800, letterSpacing: -0.2),
     );
   }
 
@@ -90,6 +103,7 @@ class PluriWaveTypography extends ThemeExtension<PluriWaveTypography> {
     TextStyle? cardTitle,
     TextStyle? bodyStrong,
     TextStyle? eyebrowLabel,
+    TextStyle? inPageSectionHeading,
   }) {
     return PluriWaveTypography(
       heroTime: heroTime ?? this.heroTime,
@@ -98,6 +112,7 @@ class PluriWaveTypography extends ThemeExtension<PluriWaveTypography> {
       cardTitle: cardTitle ?? this.cardTitle,
       bodyStrong: bodyStrong ?? this.bodyStrong,
       eyebrowLabel: eyebrowLabel ?? this.eyebrowLabel,
+      inPageSectionHeading: inPageSectionHeading ?? this.inPageSectionHeading,
     );
   }
 
@@ -117,6 +132,9 @@ class PluriWaveTypography extends ThemeExtension<PluriWaveTypography> {
       bodyStrong: TextStyle.lerp(bodyStrong, other.bodyStrong, t) ?? bodyStrong,
       eyebrowLabel:
           TextStyle.lerp(eyebrowLabel, other.eyebrowLabel, t) ?? eyebrowLabel,
+      inPageSectionHeading:
+          TextStyle.lerp(inPageSectionHeading, other.inPageSectionHeading, t) ??
+          inPageSectionHeading,
     );
   }
 }

test/pantallas/pantalla_inicio_test.dart

@@ -10,6 +10,7 @@ import 'package:pluriwave/estado/estado_radio.dart';
 import 'package:pluriwave/l10n/gen/app_localizations.dart';
 import 'package:pluriwave/modelos/emisora.dart';
 import 'package:pluriwave/pantallas/pantalla_inicio.dart';
+import 'package:pluriwave/widgets/pluri_root_header.dart';
 import 'package:pluriwave/widgets/visualizador_audio.dart';
 import 'package:provider/provider.dart';
 import 'package:shared_preferences/shared_preferences.dart';
@@ -404,6 +405,299 @@ void main() {
       expect(texto.style?.color, const Color(0xFF21D4D9));
     },
   );
+
+  testWidgets(
+    'S7 visual fidelity: "Tus emisoras" uses the in-page section heading '
+    'style (15/w800/ls-.2), not titleMedium(16)/w900',
+    (tester) async {
+      _setLargeSurfaceSize(tester);
+      final favoritos = FakeServicioFavoritos();
+      final estado = EstadoRadio(
+        audio: FakeServicioAudio(),
+        favoritos: favoritos,
+        radio: FakeServicioRadio(),
+        servicioEcualizador: FakeServicioEcualizador(),
+        servicioGrabacion: FakeServicioGrabacionRadio(),
+        resolverArchivoCustom: _archivoCustomVacio,
+        iniciarAutomaticamente: false,
+      );
+      addTearDown(estado.dispose);
+      await tester.runAsync(estado.inicializar);
+      await favoritos.agregar(emisoraDemo(uuid: 'f1', nombre: 'Favorita Uno'));
+      await estado.cargarFavoritos();
+
+      await tester.pumpWidget(
+        _conProviders(estado, _testApp(const PantallaInicio())),
+      );
+      await _pumpStableFrame(tester);
+
+      final texto = tester.widget<Text>(find.text('Tus emisoras'));
+      expect(texto.style?.fontSize, 15, reason: 'prototype t4 line 80');
+      expect(texto.style?.fontWeight, FontWeight.w800);
+      expect(texto.style?.letterSpacing, -0.2);
+    },
+  );
+
+  testWidgets(
+    'visual fidelity (audit 1.1): a full-bleed art/gradient/noise wash '
+    'sits behind the whole screen, keyed so it can be found',
+    (tester) async {
+      _setLargeSurfaceSize(tester);
+      final favoritos = FakeServicioFavoritos();
+      final estado = EstadoRadio(
+        audio: FakeServicioAudio(),
+        favoritos: favoritos,
+        radio: FakeServicioRadio(),
+        servicioEcualizador: FakeServicioEcualizador(),
+        servicioGrabacion: FakeServicioGrabacionRadio(),
+        resolverArchivoCustom: _archivoCustomVacio,
+        iniciarAutomaticamente: false,
+      );
+      addTearDown(estado.dispose);
+      await tester.runAsync(estado.inicializar);
+      final sonando = emisoraDemo(uuid: 'f1', nombre: 'Favorita Uno');
+      await favoritos.agregar(sonando);
+      await estado.cargarFavoritos();
+      await tester.runAsync(() => estado.reproducir(sonando));
+
+      await tester.pumpWidget(
+        _conProviders(estado, _testApp(const PantallaInicio())),
+      );
+      await _pumpBounded(tester);
+
+      expect(
+        find.byKey(const ValueKey('escuchar-background-art')),
+        findsOneWidget,
+        reason:
+            'prototype t4 lines 49-51: full-bleed art at .5 opacity + a '
+            'gradient + a noise texture',
+      );
+    },
+  );
+
+  testWidgets(
+    'visual fidelity (audit 1.1): the background wash still renders with '
+    'nothing playing (gradient/noise only, no station art to show)',
+    (tester) async {
+      _setLargeSurfaceSize(tester);
+      final estado = EstadoRadio(
+        audio: FakeServicioAudio(),
+        favoritos: FakeServicioFavoritos(),
+        radio: FakeServicioRadio(),
+        servicioEcualizador: FakeServicioEcualizador(),
+        servicioGrabacion: FakeServicioGrabacionRadio(),
+        resolverArchivoCustom: _archivoCustomVacio,
+        iniciarAutomaticamente: false,
+      );
+      addTearDown(estado.dispose);
+      await tester.runAsync(estado.inicializar);
+
+      await tester.pumpWidget(
+        _conProviders(estado, _testApp(const PantallaInicio())),
+      );
+      await _pumpStableFrame(tester);
+
+      expect(
+        find.byKey(const ValueKey('escuchar-background-art')),
+        findsOneWidget,
+      );
+    },
+  );
+
+  testWidgets('visual fidelity (audit 1.2): Escuchar has its own 52px "Now '
+      'listening" eyebrow header, not the shared 56px PluriRootHeader', (
+    tester,
+  ) async {
+    _setLargeSurfaceSize(tester);
+    final estado = EstadoRadio(
+      audio: FakeServicioAudio(),
+      favoritos: FakeServicioFavoritos(),
+      radio: FakeServicioRadio(),
+      servicioEcualizador: FakeServicioEcualizador(),
+      servicioGrabacion: FakeServicioGrabacionRadio(),
+      resolverArchivoCustom: _archivoCustomVacio,
+      iniciarAutomaticamente: false,
+    );
+    addTearDown(estado.dispose);
+    await tester.runAsync(estado.inicializar);
+
+    await tester.pumpWidget(
+      _conProviders(estado, _testApp(const PantallaInicio())),
+    );
+    await _pumpStableFrame(tester);
+
+    expect(find.byType(PluriRootHeader), findsNothing);
+    expect(
+      find.text('Escuchando ahora'),
+      findsOneWidget,
+      reason: 'prototype t4 line 53: "ESCUCHANDO AHORA"',
+    );
+    expect(find.byIcon(Icons.bedtime_outlined), findsOneWidget);
+
+    final cabeceras = tester
+        .widgetList<SizedBox>(find.byType(SizedBox))
+        .where((s) => s.height == 52);
+    expect(cabeceras, isNotEmpty, reason: 'prototype t4 line 53: height:52px');
+  });
+
+  testWidgets(
+    "visual fidelity (audit 1.2): the header's bedtime icon still opens "
+    'the shared sleep-timer sheet',
+    (tester) async {
+      _setLargeSurfaceSize(tester);
+      final estado = EstadoRadio(
+        audio: FakeServicioAudio(),
+        favoritos: FakeServicioFavoritos(),
+        radio: FakeServicioRadio(),
+        servicioEcualizador: FakeServicioEcualizador(),
+        servicioGrabacion: FakeServicioGrabacionRadio(),
+        resolverArchivoCustom: _archivoCustomVacio,
+        iniciarAutomaticamente: false,
+      );
+      addTearDown(estado.dispose);
+      await tester.runAsync(estado.inicializar);
+
+      await tester.pumpWidget(
+        _conProviders(estado, _testApp(const PantallaInicio())),
+      );
+      await _pumpStableFrame(tester);
+
+      await tester.tap(find.byIcon(Icons.bedtime_outlined));
+      await _pumpStableFrame(tester);
+
+      expect(find.byType(ActionChip), findsWidgets);
+    },
+  );
+
+  testWidgets('visual fidelity (audit 1.5): the station name is 24/w800/ls-.5/'
+      'height 1.12, not titleLarge(22) with no letter-spacing/height', (
+    tester,
+  ) async {
+    _setLargeSurfaceSize(tester);
+    final favoritos = FakeServicioFavoritos();
+    final estado = EstadoRadio(
+      audio: FakeServicioAudio(),
+      favoritos: favoritos,
+      radio: FakeServicioRadio(),
+      servicioEcualizador: FakeServicioEcualizador(),
+      servicioGrabacion: FakeServicioGrabacionRadio(),
+      resolverArchivoCustom: _archivoCustomVacio,
+      iniciarAutomaticamente: false,
+    );
+    addTearDown(estado.dispose);
+    await tester.runAsync(estado.inicializar);
+    // Deliberately NOT added to favoritos: the "Tus emisoras" grid also
+    // renders a station's bare name, and this assertion targets the
+    // hero's OWN station-name Text specifically -- a favorited station
+    // with the same name would render twice and make `find.text` throw.
+    final sonando = emisoraDemo(uuid: 'f1', nombre: 'Radio Horizonte');
+    await tester.runAsync(() => estado.reproducir(sonando));
+
+    await tester.pumpWidget(
+      _conProviders(estado, _testApp(const PantallaInicio())),
+    );
+    await _pumpBounded(tester);
+
+    final texto = tester.widget<Text>(find.text('Radio Horizonte'));
+    expect(texto.style?.fontSize, 24, reason: 'prototype t4 line 60');
+    expect(texto.style?.fontWeight, FontWeight.w800);
+    expect(texto.style?.letterSpacing, -0.5);
+    expect(texto.style?.height, 1.12);
+  });
+
+  testWidgets(
+    'visual fidelity (audit 1.8): the hero play button is 72x72 with a '
+    '38px icon, not 56x56 with a 28px icon',
+    (tester) async {
+      _setLargeSurfaceSize(tester);
+      final favoritos = FakeServicioFavoritos();
+      final estado = EstadoRadio(
+        audio: FakeServicioAudio(),
+        favoritos: favoritos,
+        radio: FakeServicioRadio(),
+        servicioEcualizador: FakeServicioEcualizador(),
+        servicioGrabacion: FakeServicioGrabacionRadio(),
+        resolverArchivoCustom: _archivoCustomVacio,
+        iniciarAutomaticamente: false,
+      );
+      addTearDown(estado.dispose);
+      await tester.runAsync(estado.inicializar);
+      final sonando = emisoraDemo(uuid: 'f1', nombre: 'Favorita Uno');
+      await favoritos.agregar(sonando);
+      await estado.cargarFavoritos();
+      await tester.runAsync(() => estado.reproducir(sonando));
+
+      await tester.pumpWidget(
+        _conProviders(estado, _testApp(const PantallaInicio())),
+      );
+      await _pumpBounded(tester);
+
+      final botones = tester
+          .widgetList<SizedBox>(find.byType(SizedBox))
+          .where((s) => s.width == 72 && s.height == 72);
+      expect(botones, isNotEmpty, reason: 'prototype t4 line 73');
+
+      final iconos = tester
+          .widgetList<Icon>(find.byType(Icon))
+          .where(
+            (i) =>
+                i.icon == Icons.play_arrow_rounded ||
+                i.icon == Icons.pause_rounded,
+          );
+      expect(iconos, isNotEmpty);
+      expect(iconos.first.size, 38);
+    },
+  );
+
+  testWidgets(
+    'visual fidelity (audit 1.9): the EQ/record/quality pill is centred, '
+    'pill-shaped and uses expand_less at 17px -- not a left-aligned '
+    'OutlinedButton with tune_rounded',
+    (tester) async {
+      _setLargeSurfaceSize(tester);
+      final favoritos = FakeServicioFavoritos();
+      final estado = EstadoRadio(
+        audio: FakeServicioAudio(),
+        favoritos: favoritos,
+        radio: FakeServicioRadio(),
+        servicioEcualizador: FakeServicioEcualizador(),
+        servicioGrabacion: FakeServicioGrabacionRadio(),
+        resolverArchivoCustom: _archivoCustomVacio,
+        iniciarAutomaticamente: false,
+      );
+      addTearDown(estado.dispose);
+      await tester.runAsync(estado.inicializar);
+      final sonando = emisoraDemo(uuid: 'f1', nombre: 'Favorita Uno');
+      await favoritos.agregar(sonando);
+      await estado.cargarFavoritos();
+      await tester.runAsync(() => estado.reproducir(sonando));
+
+      await tester.pumpWidget(
+        _conProviders(estado, _testApp(const PantallaInicio())),
+      );
+      await _pumpBounded(tester);
+
+      expect(find.byType(OutlinedButton), findsNothing);
+      expect(
+        find.byIcon(Icons.expand_less_rounded),
+        findsOneWidget,
+        reason: 'prototype t4 line 78: expand_less at 17px',
+      );
+      final icono = tester.widget<Icon>(find.byIcon(Icons.expand_less_rounded));
+      expect(icono.size, 17);
+
+      final pildoras = tester
+          .widgetList<DecoratedBox>(find.byType(DecoratedBox))
+          .map((d) => d.decoration)
+          .whereType<BoxDecoration>()
+          .where((d) => d.borderRadius == BorderRadius.circular(999));
+      expect(
+        pildoras,
+        isNotEmpty,
+        reason: 'prototype t4 line 78: border-radius:999px pill',
+      );
+    },
+  );
 }
 
 /// Mirrors the app.dart wiring: EstadoRadio owns the domain notifiers and

test/pantallas/pantalla_reproductor_test.dart

@@ -9,7 +9,10 @@ import 'package:pluriwave/l10n/gen/app_localizations.dart';
 import 'package:pluriwave/modelos/emisora.dart';
 import 'package:pluriwave/modelos/preset_ecualizador.dart';
 import 'package:pluriwave/pantallas/pantalla_reproductor.dart';
+import 'package:pluriwave/tema/pluriwave_tokens.dart';
 import 'package:pluriwave/widgets/ecualizador_widget.dart';
+import 'package:pluriwave/widgets/pluri_glass_surface.dart';
+import 'package:pluriwave/widgets/visualizador_audio.dart';
 import 'package:provider/provider.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
@@ -548,4 +551,157 @@ void main() {
       );
     },
   );
+
+  group('Visual fidelity (screens 1-3 closing pass)', () {
+    testWidgets('audit 2.1: the hero art is a fixed 246x246, not width*0.62', (
+      tester,
+    ) async {
+      final estado = crearEstado();
+      addTearDown(estado.dispose);
+
+      await montarPantalla(tester, estado);
+
+      final sizedBox = tester.widget<SizedBox>(
+        find.byKey(const Key('player-hero-art')),
+      );
+      expect(sizedBox.width, 246, reason: 'prototype t4 line 114');
+      expect(sizedBox.height, 246);
+    });
+
+    testWidgets(
+      'audit 2.2: a full-bleed backdrop sits behind the whole screen',
+      (tester) async {
+        const estacion = Emisora(
+          uuid: 'demo-uuid',
+          nombre: 'Radio Demo',
+          url: 'https://stream.demo/radio',
+          favicon: 'https://example.com/art.png',
+        );
+        final estado = crearEstado();
+        addTearDown(estado.dispose);
+
+        await montarPantalla(tester, estado, estacion: estacion);
+
+        expect(
+          find.byKey(const Key('player-background-art')),
+          findsOneWidget,
+          reason: 'prototype t4 lines 108-109: full-bleed blurred backdrop',
+        );
+      },
+    );
+
+    testWidgets('audit 2.2: the backdrop still renders (gradient only) with no '
+        'station art available', (tester) async {
+      final estado = crearEstado();
+      addTearDown(estado.dispose);
+
+      await montarPantalla(tester, estado);
+
+      expect(find.byKey(const Key('player-background-art')), findsOneWidget);
+    });
+
+    testWidgets('audit 2.3: the title is 26/w800/ls-.5/height 1.15, not '
+        'headlineSmall(24)/w700', (tester) async {
+      final estado = crearEstado();
+      addTearDown(estado.dispose);
+
+      await montarPantalla(tester, estado);
+
+      final texto = tester.widget<Text>(find.text(emisora.nombre));
+      expect(texto.style?.fontSize, 26, reason: 'prototype t4 line 116');
+      expect(texto.style?.fontWeight, FontWeight.w800);
+      expect(texto.style?.letterSpacing, -0.5);
+      expect(texto.style?.height, 1.15);
+    });
+
+    testWidgets(
+      'audit 2.8: only the EQ propio tile is accented -- tinted brand '
+      'background/border, the other three share a neutral opaque surface',
+      (tester) async {
+        final estado = crearEstado();
+        addTearDown(estado.dispose);
+
+        await montarPantalla(tester, estado);
+
+        final eqDecoration =
+            tester
+                    .widget<Container>(
+                      find
+                          .descendant(
+                            of: find.byKey(const Key('player-tool-eq')),
+                            matching: find.byType(Container),
+                          )
+                          .first,
+                    )
+                    .decoration
+                as BoxDecoration;
+        expect(
+          eqDecoration.color,
+          PluriWaveTokens.brand.withValues(alpha: 0.16),
+          reason: 'prototype t4 line 133',
+        );
+
+        final recordDecoration =
+            tester
+                    .widget<Container>(
+                      find
+                          .descendant(
+                            of: find.byKey(const Key('player-tool-record')),
+                            matching: find.byType(Container),
+                          )
+                          .first,
+                    )
+                    .decoration
+                as BoxDecoration;
+        expect(
+          recordDecoration.color,
+          isNot(PluriWaveTokens.brand.withValues(alpha: 0.16)),
+          reason: 'prototype t4 line 134: no explicit accent colour',
+        );
+      },
+    );
+
+    testWidgets(
+      'audit 2.9: the transport row is not wrapped in a glass surface '
+      'card',
+      (tester) async {
+        final estado = crearEstado();
+        addTearDown(estado.dispose);
+
+        await montarPantalla(tester, estado);
+
+        expect(
+          find.ancestor(
+            of: find.byIcon(Icons.favorite_outline_rounded),
+            matching: find.byType(PluriGlassSurface),
+          ),
+          findsNothing,
+          reason: 'prototype t4 lines 124-131: bare row, no glass card',
+        );
+      },
+    );
+
+    testWidgets(
+      'audit 2.10: the visualizer is not wrapped in its own glass card',
+      (tester) async {
+        final estado = crearEstado();
+        addTearDown(estado.dispose);
+
+        await montarPantalla(tester, estado);
+
+        final visualizador = find.byKey(const Key('player-visualizer'));
+        expect(tester.widget(visualizador), isA<VisualizadorAudio>());
+        expect(
+          find.ancestor(
+            of: visualizador,
+            matching: find.byType(PluriGlassSurface),
+          ),
+          findsNothing,
+          reason:
+              'prototype t4 lines 120-122: bars sit on the bare '
+              'background',
+        );
+      },
+    );
+  });
 }

test/pantallas/root_header_wiring_test.dart

@@ -102,8 +102,19 @@ void main() {
   );
 
   testWidgets(
-    'Escuchar draws its own PluriRootHeader with the tab title, no AppBar',
+    'Escuchar is the documented header exception: a 52px "now listening" '
+    'eyebrow instead of a PluriRootHeader title row, and still no AppBar',
     (tester) async {
+      // The prototype gives Escuchar a STRUCTURALLY different header from
+      // every other root (t4 line 53 vs line 325): 52px rather than 56, an
+      // eyebrow at 15px/w800/55% opacity rather than a 23px title, and
+      // trailing actions rather than a CTA. This test originally asserted
+      // `PluriRootHeader` on all five roots — an over-broad premise, since
+      // Escuchar's header was never a title row in the design.
+      //
+      // What still holds unconditionally, and is what this guards: no
+      // AppBar anywhere (systemic item S1), and the sleep-timer action that
+      // used to live in the removed global chrome is still reachable here.
       _suppressListTileInkAssertion();
       setLargeSurface(tester);
       final estado = crearEstadoRadio();
@@ -112,9 +123,18 @@ void main() {
       await tester.pumpWidget(testApp(estado, const PantallaInicio()));
       await pumpStable(tester);
 
-      expect(find.byType(PluriRootHeader), findsOneWidget);
-      expect(titleInHeader('Listen'), findsOneWidget);
       expect(find.byType(AppBar), findsNothing);
+      expect(
+        find.byType(PluriRootHeader),
+        findsNothing,
+        reason: 'Escuchar uses its own eyebrow header, not the shared one',
+      );
+      expect(find.text('Now listening'), findsOneWidget);
+      expect(
+        find.byIcon(Icons.bedtime_outlined),
+        findsOneWidget,
+        reason: 'the sleep-timer action survived the global AppBar removal',
+      );
     },
   );
 

test/tema/pluriwave_typography_test.dart

@@ -65,6 +65,20 @@ void main() {
       expect(type.eyebrowLabel.letterSpacing, 0.8);
     });
 
+    test(
+      'S7 (visual fidelity): inPageSectionHeading is 15 / w800 / '
+      'letter-spacing -0.2 -- the ADR-1 amendment adding a seventh style',
+      () {
+        expect(
+          type.inPageSectionHeading.fontSize,
+          15,
+          reason: 'prototype t4 lines 80, 153, 164, 173',
+        );
+        expect(type.inPageSectionHeading.fontWeight, FontWeight.w800);
+        expect(type.inPageSectionHeading.letterSpacing, -0.2);
+      },
+    );
+
     test('S9 (Tier 1 visual fidelity): eyebrowLabel bakes in the prototype '
         "colour rgba(242,247,250,.42) — it used to carry no colour at all, "
         'so it rendered at full onSurface opacity', () {