diff --git a/src/app/insights/blood-pressure/page.tsx b/src/app/insights/blood-pressure/page.tsx
index 252395a67..36518729c 100644
--- a/src/app/insights/blood-pressure/page.tsx
+++ b/src/app/insights/blood-pressure/page.tsx
@@ -9,6 +9,7 @@ import { useTranslations } from "@/lib/i18n/context";
 import { useInsightsLayoutPrefs } from "@/hooks/use-insights-layout-prefs";
 import { useChartDomainStats } from "@/hooks/use-chart-domain-stats";
 import { Button } from "@/components/ui/button";
+import { Card, CardContent } from "@/components/ui/card";
 import { HealthChartDynamic } from "@/components/charts/health-chart-dynamic";
 import { SlugInsightStatusCard } from "@/components/insights/slug-insight-status-card";
 import { MeasurementDiversityNudge } from "@/components/insights/measurement-diversity-nudge";
@@ -189,18 +190,24 @@ export default function InsightsBlutdruckPage() {
         const pp = Math.round(sbp - dbp);
         const map = Math.round((sbp + 2 * dbp) / 3);
         return (
-          <p
-            data-slot="bp-derived-caption"
-            className="text-muted-foreground text-sm leading-relaxed"
-          >
-            {t("insights.subPage.bpDerived.pulsePressure", {
-              value: pp,
-            })}{" "}
-            {t("insights.subPage.bpDerived.meanArterialPressure", {
-              value: map,
-            })}{" "}
-            {t("insights.subPage.bpDerived.caveat")}
-          </p>
+          // Card shell at the compact density so the explainer shares the
+          // spine's left text edge (the bare paragraph sat at the container
+          // edge, ~16–24 px left of every neighbouring card's text) — and
+          // foreground, not muted: multi-sentence explainer prose is
+          // content, muted stays reserved for meta.
+          <Card data-slot="bp-derived-caption" className="gap-2 py-3 md:py-4">
+            <CardContent>
+              <p className="text-sm leading-relaxed">
+                {t("insights.subPage.bpDerived.pulsePressure", {
+                  value: pp,
+                })}{" "}
+                {t("insights.subPage.bpDerived.meanArterialPressure", {
+                  value: map,
+                })}{" "}
+                {t("insights.subPage.bpDerived.caveat")}
+              </p>
+            </CardContent>
+          </Card>
         );
       })()}
 
diff --git a/src/app/insights/medications/page.tsx b/src/app/insights/medications/page.tsx
index e5b7d4af7..02eef163f 100644
--- a/src/app/insights/medications/page.tsx
+++ b/src/app/insights/medications/page.tsx
@@ -210,7 +210,7 @@ export default function InsightsMedikamentePage() {
                 ? t("medications.categoryVitamin")
                 : t("medications.categoryOther");
           return (
-            <Card key={med.id} className="gap-2 py-4 md:gap-3 md:py-5">
+            <Card key={med.id} className="gap-2 py-3 md:py-4">
               <CardHeader>
                 <TileHeader icon={Pill} title={med.name} />
                 <div className="text-muted-foreground mt-1 flex flex-wrap items-center gap-x-2 gap-y-1 text-xs">
diff --git a/src/components/dashboard/recent-workouts-tile.tsx b/src/components/dashboard/recent-workouts-tile.tsx
index ad111d972..a4557b5c0 100644
--- a/src/components/dashboard/recent-workouts-tile.tsx
+++ b/src/components/dashboard/recent-workouts-tile.tsx
@@ -103,7 +103,9 @@ export function RecentWorkoutsTile() {
   return (
     <div
       data-slot="recent-workouts-tile"
-      className={cn("bg-card border-border space-y-3 rounded-xl border p-4")}
+      className={cn(
+        "bg-card border-border space-y-3 rounded-xl border p-4 md:p-6",
+      )}
     >
       <div className="flex items-center justify-between gap-3">
         <div className="flex items-center gap-2">
diff --git a/src/components/gamification/recent-achievements-card.tsx b/src/components/gamification/recent-achievements-card.tsx
index df45024f8..061af2df7 100644
--- a/src/components/gamification/recent-achievements-card.tsx
+++ b/src/components/gamification/recent-achievements-card.tsx
@@ -111,7 +111,7 @@ export function RecentAchievementsCard() {
   return (
     <div
       data-slot="recent-achievements-card"
-      className="bg-card border-border space-y-3 rounded-xl border p-4"
+      className="bg-card border-border space-y-3 rounded-xl border p-4 md:p-6"
     >
       <div className="flex items-center justify-between gap-3">
         <div className="flex items-center gap-2">
diff --git a/src/components/insights/derived/coach-read-strip.tsx b/src/components/insights/derived/coach-read-strip.tsx
index 6e5eb68aa..8971fd4ea 100644
--- a/src/components/insights/derived/coach-read-strip.tsx
+++ b/src/components/insights/derived/coach-read-strip.tsx
@@ -8,6 +8,7 @@ import { useMounted } from "@/hooks/use-mounted";
 import { useTranslations } from "@/lib/i18n/context";
 import { queryKeys } from "@/lib/query-keys";
 import { apiGet } from "@/lib/api/api-fetch";
+import { Card, CardContent, CardHeader } from "@/components/ui/card";
 import { TileHeader } from "@/components/insights/tile-header";
 import type { CoachReadStripData } from "@/lib/insights/derived/coach-read-shape";
 
@@ -109,28 +110,35 @@ export function CoachReadStrip({
   // fires defensively.)
   if (!baselineLine && !driverLine) return null;
 
-  // Standard card anatomy — the same TileHeader-led shape as every other
-  // insights card (foreground icon + title), instead of the former inline
-  // mini-icon strip that read as chrome outside the card system. Body prose
-  // in the regular foreground; muted stays reserved for meta lines.
+  // Standard card anatomy — the real Card + TileHeader + CardContent
+  // primitives at the compact density (the metric-stat-strip reference),
+  // so background, radius, icon spacing and the left text edge match
+  // every other insights tile. The former hand-rolled shell
+  // (`bg-card/60 … px-4 py-3.5`) painted a translucent background and a
+  // text edge ~8 px left of the card norm on md+. Body prose in the
+  // regular foreground; muted stays reserved for meta lines.
   return (
-    <div
-      data-slot="coach-read-strip"
-      className="bg-card/60 border-border/60 space-y-2 rounded-xl border px-4 py-3.5"
-    >
-      <TileHeader icon={Sparkles} title={t("insights.coach.readStrip.label")} />
-      <div className="text-foreground min-w-0 space-y-1 text-sm leading-relaxed">
-        {baselineLine ? (
-          <p data-slot="coach-read-baseline" className="text-pretty">
-            {baselineLine}
-          </p>
-        ) : null}
-        {driverLine ? (
-          <p data-slot="coach-read-driver" className="text-pretty">
-            {driverLine}
-          </p>
-        ) : null}
-      </div>
-    </div>
+    <Card data-slot="coach-read-strip" className="gap-2 py-3 md:py-4">
+      <CardHeader>
+        <TileHeader
+          icon={Sparkles}
+          title={t("insights.coach.readStrip.label")}
+        />
+      </CardHeader>
+      <CardContent>
+        <div className="min-w-0 space-y-1 text-sm leading-relaxed">
+          {baselineLine ? (
+            <p data-slot="coach-read-baseline" className="text-pretty">
+              {baselineLine}
+            </p>
+          ) : null}
+          {driverLine ? (
+            <p data-slot="coach-read-driver" className="text-pretty">
+              {driverLine}
+            </p>
+          ) : null}
+        </div>
+      </CardContent>
+    </Card>
   );
 }
diff --git a/src/components/insights/health-score-card.tsx b/src/components/insights/health-score-card.tsx
index 9eab66de4..1dc4a637b 100644
--- a/src/components/insights/health-score-card.tsx
+++ b/src/components/insights/health-score-card.tsx
@@ -302,7 +302,7 @@ export function HealthScoreCard({
       data-slot="health-score-card"
       data-band={band}
       className={cn(
-        "bg-card/65 rounded-xl border px-4 py-4 shadow-sm backdrop-blur-sm",
+        "bg-card/65 rounded-xl border p-4 shadow-sm backdrop-blur-sm md:p-6",
         BAND_BORDER_CLASS[band],
         // v1.4.27 MB7 / CF-34 — basis-based width so the score column
         // flexes inside the hero strip's `md:flex-row` split. Earlier
diff --git a/src/components/insights/hero-strip.tsx b/src/components/insights/hero-strip.tsx
index 7cde2c5d2..d97dbf8b9 100644
--- a/src/components/insights/hero-strip.tsx
+++ b/src/components/insights/hero-strip.tsx
@@ -368,7 +368,7 @@ export function HeroStrip({
             data-slot="health-score-card-skeleton"
             aria-hidden="true"
             className={cn(
-              "bg-card/65 border-border/60 rounded-xl border px-4 py-4 shadow-sm backdrop-blur-sm",
+              "bg-card/65 border-border/60 rounded-xl border p-4 shadow-sm backdrop-blur-sm md:p-6",
               "w-full md:shrink-0 md:grow-0 md:basis-[22rem] xl:basis-[26rem]",
               "flex h-full min-h-64 flex-col gap-3.5",
             )}
diff --git a/src/components/insights/insight-status-card.tsx b/src/components/insights/insight-status-card.tsx
index 08c86e806..9067a7b5d 100644
--- a/src/components/insights/insight-status-card.tsx
+++ b/src/components/insights/insight-status-card.tsx
@@ -107,7 +107,7 @@ export function InsightStatusCard({
         aria-busy="true"
         aria-live="polite"
         data-testid="insight-status-card-preparing"
-        className="gap-1.5 py-4 md:py-5"
+        className="gap-2 py-3 md:py-4"
       >
         <CardHeader>
           <TileHeader icon={nodeIcon(icon)} title={title} />
@@ -140,11 +140,10 @@ export function InsightStatusCard({
         aria-busy="true"
         aria-live="polite"
         data-testid="insight-status-card-loading"
-        // v1.13.1 — match the canonical `gap-1.5` + `pb-1` heading-to-body
-        // rhythm the populated / preparing / empty states use, so the
-        // heading and the first skeleton line sit on the same tight
-        // baseline across every assessment-card state.
-        className="gap-1.5 py-4 md:py-5"
+        // Compact card density — the same tier the populated / preparing /
+        // empty states use, so the heading and the first skeleton line sit
+        // on the same baseline across every assessment-card state.
+        className="gap-2 py-3 md:py-4"
       >
         <CardHeader>
           <div className="flex items-center gap-2">
@@ -165,7 +164,7 @@ export function InsightStatusCard({
 
   if (!hasProvider) {
     return (
-      <Card className="gap-1.5 py-4 opacity-80 md:py-5">
+      <Card className="gap-2 py-3 opacity-80 md:py-4">
         <CardHeader>
           <TileHeader icon={nodeIcon(icon)} title={title} />
         </CardHeader>
@@ -187,7 +186,7 @@ export function InsightStatusCard({
 
   if (!text) {
     return (
-      <Card className="gap-1.5 py-4 md:py-5">
+      <Card className="gap-2 py-3 md:py-4">
         <CardHeader>
           <TileHeader icon={nodeIcon(icon)} title={title} />
         </CardHeader>
@@ -211,25 +210,15 @@ export function InsightStatusCard({
       // v1.12.2 — stable hook for the spine guard test, which asserts the
       // assessment is the LAST content block on every bespoke metric page.
       data-slot="insight-assessment"
-      // v1.8.5 W4a — the `Card` primitive ships `gap-4 md:gap-6` as the flex
-      // gap between header and content, which floated the "Einschätzung"
-      // heading ~16-24 px above its prose. Override to `gap-2 md:gap-3` (the
-      // `CardHeader`'s own `pb-2` does not touch the flex gap) and trim the
-      // shell padding to `py-4 md:py-5` so the assessment block reads tight
-      // in the denser sub-page rhythm. The same override lands on every
-      // status variant below so the gap is consistent across states.
-      //
-      // v1.8.6 — drop the purple left accent (`border-l-dracula-purple
-      // border-l-2`). The coloured rule made the assessment card read as
-      // restless against the calmer surrounding cards; the plain card
-      // border carries enough separation on its own.
-      //
-      // v1.12.8 — tighten the header-to-prose gap. The card flex gap is
-      // `gap-1.5` (was `gap-2 md:gap-3`) and the `CardHeader` trims its
-      // bottom padding to `pb-1` (was `pb-2`), so the `<TileHeader>` sits
-      // close to the prose and matches the header-to-body rhythm of the
-      // sibling tiles. The loading skeleton keeps its own spacing.
-      className="animate-insight-in gap-1.5 py-4 md:py-5"
+      // Compact card density (`gap-2 py-3 md:py-4`) — the sanctioned tight
+      // tier, so the assessment shares one header→body rhythm with the
+      // target summary, the read strip, and the stat strip on the same
+      // spine. Earlier bespoke values (`gap-1.5` + `md:py-5`) predate the
+      // two-density contract and were normalised onto it. The same class
+      // lands on every status variant so the gap is consistent across
+      // states. (The one-time purple left accent stays dropped — the plain
+      // card border carries enough separation.)
+      className="animate-insight-in gap-2 py-3 md:py-4"
     >
       <CardHeader>
         {/* v1.11.5 — the top-right "cached" label was removed: it surfaced
diff --git a/src/components/insights/metric-target-summary.tsx b/src/components/insights/metric-target-summary.tsx
index 2f5622e2b..41d4eec69 100644
--- a/src/components/insights/metric-target-summary.tsx
+++ b/src/components/insights/metric-target-summary.tsx
@@ -296,14 +296,14 @@ function TargetReferencePanel({
     target.consistency7d.length > 0;
 
   return (
-    // Card-wrapped so the header-to-body offset matches the `<CardHeader
-    // pb-2>` tiles on the same subpage spine rather than the old bare-div
-    // `space-y-3`. The body keeps its inter-row `space-y-3` inside
+    // Card-wrapped at the compact density so the header-to-body offset
+    // matches the assessment / read-strip / stat-strip tiles on the same
+    // subpage spine. The body keeps its inter-row `space-y-3` inside
     // `CardContent`; every data-slot is preserved.
     <Card
       data-slot="metric-target-summary"
       data-target-type={target.type}
-      className="gap-2 py-4 md:gap-3 md:py-5"
+      className="gap-2 py-3 md:py-4"
     >
       {/* Row 1: the canonical tile header — a single-word "Ziel" / "Target"
           heading (the range numbers live on the range bar below, so the
diff --git a/src/components/insights/mood/mood-insights-sections.tsx b/src/components/insights/mood/mood-insights-sections.tsx
index 025993f3f..5fe0d9385 100644
--- a/src/components/insights/mood/mood-insights-sections.tsx
+++ b/src/components/insights/mood/mood-insights-sections.tsx
@@ -287,7 +287,7 @@ export function MoodInsightsSections({
         // v1.13.1 — match the canonical `gap-1.5` + `pb-1` heading-to-body
         // rhythm the other assessment cards use, so the heading sits tight
         // above its body instead of floating ~16-24 px above it.
-        className="animate-insight-in gap-1.5 py-4 md:py-5"
+        className="animate-insight-in gap-2 py-3 md:py-4"
       >
         <CardHeader>
           <TileHeader
diff --git a/src/components/insights/sleep-hypnogram.tsx b/src/components/insights/sleep-hypnogram.tsx
index fed7b4ec0..2fe5610f7 100644
--- a/src/components/insights/sleep-hypnogram.tsx
+++ b/src/components/insights/sleep-hypnogram.tsx
@@ -247,7 +247,7 @@ export function SleepHypnogram({ session }: SleepHypnogramProps) {
     // v1.12.0 — card tightened: drop the default Card `gap-4 md:gap-6` to
     // `gap-3` so the header sits closer to the timeline, reclaiming the empty
     // band the maintainer flagged. The chart keeps its 200 px footprint.
-    <Card data-slot="sleep-hypnogram" className="gap-3 md:gap-3">
+    <Card data-slot="sleep-hypnogram" className="gap-2">
       <CardHeader>
         <div className="flex flex-col gap-0.5">
           <TileHeader title={t("insights.sleep.hypnogram.title")} />
diff --git a/src/components/settings/injection-sites-card.tsx b/src/components/settings/injection-sites-card.tsx
index 78cfb3a24..04473f624 100644
--- a/src/components/settings/injection-sites-card.tsx
+++ b/src/components/settings/injection-sites-card.tsx
@@ -73,7 +73,7 @@ export function InjectionSitesCard({
         title={t("settings.globalExcludedInjectionSitesLabel")}
         description={t("settings.globalExcludedInjectionSitesHint")}
       />
-      <div className="mt-3 grid grid-cols-1 gap-2 pl-7 sm:grid-cols-2">
+      <div className="mt-4 grid grid-cols-1 gap-2 pl-7 sm:grid-cols-2">
         {INJECTION_SITE_KEYS.map((site) => (
           <label key={site} className="flex items-center gap-2 text-sm">
             <Checkbox
diff --git a/src/components/settings/modules-section.tsx b/src/components/settings/modules-section.tsx
index d38419b5b..145219093 100644
--- a/src/components/settings/modules-section.tsx
+++ b/src/components/settings/modules-section.tsx
@@ -121,16 +121,15 @@ export function ModulesSection() {
   // was removed: a domain that can't be turned off doesn't need to be listed.
   return (
     <SettingsCard>
+      {/* The "what this section does" hint rides the header's standard
+          description slot; the body follows at the settings-wide mt-4
+          header→content rhythm instead of the former mb-2/mb-3 one-offs. */}
       <SettingsCardHeader
         icon={Blocks}
         title={t("settings.sections.modules.toggleable.title")}
-        className="mb-2"
+        description={t("settings.sections.modules.toggleable.description")}
       />
-      {/* v1.18.6 — restore the one-line "what this section does" hint. */}
-      <p className="text-muted-foreground mb-3 pl-7 text-sm leading-relaxed">
-        {t("settings.sections.modules.toggleable.description")}
-      </p>
-      <div className="divide-border divide-y pl-7">
+      <div className="divide-border mt-4 divide-y pl-7">
         {(Object.keys(MODULE_REGISTRY) as ModuleKey[])
           // Modules switched off in code (pending a rebuild) carry no live
           // toggle — drop the row entirely so a user can't turn one on.