diff --git a/containers/libreportal/frontend/components/apps/overview/css/overview.css b/containers/libreportal/frontend/components/apps/overview/css/overview.css
index a42733d..7840eef 100644
--- a/containers/libreportal/frontend/components/apps/overview/css/overview.css
+++ b/containers/libreportal/frontend/components/apps/overview/css/overview.css
@@ -42,6 +42,33 @@
    the area padding the old header used to provide at the top. */
 .overview-tabbed { margin-top: 0; padding: 22px 24px 24px; }
 
+/* Tab header: title + blurb left, action buttons right, divider underneath —
+   the same shape as the per-app .backup-title / .updater-title rows (the
+   .config-title base supplies the 20px padding + bottom border). */
+#overview-view .ov-tab-header {
+  display: flex;
+  align-items: flex-start;
+  justify-content: space-between;
+  gap: 16px;
+}
+#overview-view .ov-tab-header-main { flex: 1; min-width: 0; }
+#overview-view .ov-tab-header-actions {
+  display: flex;
+  gap: 10px;
+  align-items: center;
+  flex-shrink: 0;
+}
+
+/* Recessed dark panel holding each tab's body — same recipe as the per-app
+   .tasks-container / .backup-snapshots-container / .updater-detail-container,
+   so the fleet tabs read exactly like the app-detail tabs. */
+#overview-view .ov-tab-body {
+  margin: 16px;
+  padding: 16px;
+  background: rgba(var(--bg-rgb), 0.2);
+  border-radius: 8px;
+}
+
 /* ---- Updates: filter chips + toolbar ------------------------------------ */
 .ov-toolbar {
   display: flex;
@@ -164,6 +191,11 @@
   border-radius: 0;
   background: transparent;
   cursor: pointer;
+  /* Type matches .main-tab-button so the nested strip reads like the outer
+     overview tab strip, not like the backup page's vertical sidebar. */
+  font-size: 12px;
+  font-weight: 500;
+  color: var(--text-secondary, #ccc);
 }
 #overview-view #ov-pane-backups .backup-layout > .sidebar .category:hover {
   color: var(--accent);
diff --git a/containers/libreportal/frontend/components/apps/overview/js/overview-manager.js b/containers/libreportal/frontend/components/apps/overview/js/overview-manager.js
index e9db4ab..9786e7e 100644
--- a/containers/libreportal/frontend/components/apps/overview/js/overview-manager.js
+++ b/containers/libreportal/frontend/components/apps/overview/js/overview-manager.js
@@ -140,34 +140,49 @@ class OverviewManager {
   }
 
   // The shared in-content header. Sourced only from OV_TAB_META so every fleet
-  // tab matches the per-app detail tabs' .config-title (emoji + title + blurb,
-  // inside the pane, above the body). renderTab() prepends this for the string
-  // tabs; mountMigrate() injects it once for the static Migrate pane.
-  renderHeader(id) {
+  // tab matches the per-app detail tabs' title block (emoji + title + blurb
+  // left, action buttons right, divider underneath — the .backup-title shape).
+  // renderTab() prepends this for the string tabs; mountMigrate() injects it
+  // once for the static Migrate pane.
+  renderHeader(id, actions = '') {
     const m = OV_TAB_META[id];
     if (!m) return '';
-    return `<div class="config-title ov-tab-header"><h3>${m.icon} ${this.escape(m.title)}</h3><p>${this.escape(m.desc)}</p></div>`;
+    return `<div class="config-title ov-tab-header">
+      <div class="ov-tab-header-main"><h3>${m.icon} ${this.escape(m.title)}</h3><p>${this.escape(m.desc)}</p></div>
+      ${actions ? `<div class="ov-tab-header-actions">${actions}</div>` : ''}
+    </div>`;
   }
 
   renderTab(id) {
     const pane = document.querySelector(`#overview-view .tab-pane[data-tab="${id}"]`);
     if (!pane) return;
-    // Every string-rendered tab leads with the shared in-content header, so the
-    // body renderers below only ever produce the body (never a heading).
+    // Every string-rendered tab follows the per-app detail tab idiom: the
+    // shared header (title + actions + divider) on top, then the body inside
+    // the recessed .ov-tab-body container — so the renderers below only ever
+    // produce the body (never a heading or its action buttons).
+    const checkBtn = (label) => `<button class="updater-btn" data-updater-action="check">↻ ${label}</button>`;
+    const body = (html) => `<div class="ov-tab-body">${html}</div>`;
     switch (id) {
-      case 'overview': pane.innerHTML = this.renderHeader(id) + this.renderOverview(); break;
+      case 'overview':
+        pane.innerHTML = this.renderHeader(id, checkBtn('Check now')) + body(this.renderOverview());
+        break;
       case 'updates': {
         // Preserve which rows are expanded across a rebuild — a background
         // task-refresh repaints the whole table, so restore ALL open rows, not
         // just the single ?app= deep-link.
         const open = Array.from(document.querySelectorAll('#overview-view .ov-row-details:not([hidden])'))
           .map((d) => d.id.replace(/^ov-detail-/, ''));
-        pane.innerHTML = this.renderHeader(id) + this.renderUpdates();
+        const anyUpdate = !!(this.updater && this.updater.apps.some((a) => a.update_available));
+        const actions = checkBtn('Check')
+          + (anyUpdate ? ` <button class="updater-btn updater-btn-primary" data-updater-action="update-all">Update all</button>` : '');
+        pane.innerHTML = this.renderHeader(id, actions) + body(this.renderUpdates());
         open.forEach((app) => this._openDetail(app));
         this._honorAppDeepLink();
         break;
       }
-      case 'improvements': pane.innerHTML = this.renderHeader(id) + this.renderImprovements(); break;
+      case 'improvements':
+        pane.innerHTML = this.renderHeader(id, checkBtn('Check')) + body(this.renderImprovements());
+        break;
       case 'backups': this.mountBackupCenter(pane); break;
       case 'migrate': this.mountMigrate(); break;
     }
@@ -310,8 +325,7 @@ class OverviewManager {
           `<button class="updater-btn" data-overview-action="goto" data-tab="improvements">View</button>`)}
         ${card('backups', b.protectedLabel, 'Backups protected', b.sub,
           `<button class="updater-btn" data-overview-action="goto" data-tab="backups">Backups</button>`)}
-        ${card('system', u.apps, 'Apps tracked', `last scan: ${checked}`,
-          `<button class="updater-btn" data-updater-action="check">Check now</button>`)}
+        ${card('system', u.apps, 'Apps tracked', `last scan: ${checked}`)}
       </div>
       ${(this.updater && this.updater.updates) ? '' : `<div class="updater-hint">No scan data yet — run <strong>Check now</strong> to fetch versions, CVEs &amp; improvements.</div>`}`;
   }
@@ -341,19 +355,16 @@ class OverviewManager {
     const up = this.updater;
     if (!up || !up.apps.length) return `<div class="updater-empty">No installed apps to track.</div>`;
     const shown = this.filterApps(up.apps);
-    const anyUpdate = up.apps.some((a) => a.update_available);
     const nUpd = up.apps.filter((a) => a.update_available).length;
     const nSec = up.apps.filter((a) => (a.cves || []).length).length;
     const chip = (id, label, n) =>
       `<button class="ov-chip${this.filter === id ? ' active' : ''}" data-overview-action="filter" data-filter="${id}">${label}${n != null ? ` <span class="ov-chip-n">${n}</span>` : ''}</button>`;
     const rows = shown.map((a) => this.updateRow(a)).join('') || `<div class="updater-empty">Nothing matches this filter.</div>`;
+    // Check / Update all live in the tab header's action slot (renderTab), so
+    // the toolbar is just the filter chips.
     return `
       <div class="updater-toolbar ov-toolbar">
         <div class="ov-chips">${chip('all', 'All', up.apps.length)}${chip('updates', 'Updates', nUpd)}${chip('security', 'Security', nSec)}</div>
-        <div class="ov-toolbar-actions">
-          <button class="updater-btn" data-updater-action="check">↻ Check</button>
-          ${anyUpdate ? `<button class="updater-btn updater-btn-primary" data-updater-action="update-all">Update all</button>` : ''}
-        </div>
       </div>
       <div class="updater-list ov-updates-list">${rows}</div>`;
   }
@@ -434,7 +445,9 @@ class OverviewManager {
   // ---- Improvements tab (reuse the updater's hotfix renderer) ---------------
 
   renderImprovements() {
-    return this.updater ? this.updater.renderImprovements() : `<div class="updater-empty">Improvements unavailable.</div>`;
+    // withToolbar=false — the fleet tab's "Check" button lives in the shared
+    // header action slot, so the embedded renderer skips its own toolbar.
+    return this.updater ? this.updater.renderImprovements(false) : `<div class="updater-empty">Improvements unavailable.</div>`;
   }
 
   // ---- Backups tab (fleet health glance; actions deep-link per app) ---------
diff --git a/containers/libreportal/frontend/components/updater/js/updater-page.js b/containers/libreportal/frontend/components/updater/js/updater-page.js
index eb1e774..82be798 100644
--- a/containers/libreportal/frontend/components/updater/js/updater-page.js
+++ b/containers/libreportal/frontend/components/updater/js/updater-page.js
@@ -302,7 +302,9 @@ class UpdaterPage {
       <div class="updater-list">${rows}</div>`;
   }
 
-  renderImprovements() {
+  // withToolbar=false lets an embedding surface (the fleet Overview tab) skip
+  // the inline Check button because it provides one in its own header.
+  renderImprovements(withToolbar = true) {
     if (!this.artifacts) return this.empty('No hotfix data yet. Run a check to fetch the signed improvements index.', true);
     const list = Array.isArray(this.artifacts.artifacts) ? this.artifacts.artifacts : [];
     const signed = !!this.artifacts.signed;
@@ -331,7 +333,7 @@ class UpdaterPage {
       ? `<div class="updater-hint">Small, signed, individually-reversible improvements curated by the LibrePortal team. Security &amp; breakage fixes apply automatically (a snapshot is taken first); the rest are one click. Every apply is logged in History and can be reverted.</div>`
       : `<div class="updater-hint">⚠ The improvements index is <strong>unsigned</strong> (signing not activated on this build) — applying is disabled for safety.</div>`;
     return `${banner}
-      <div class="updater-toolbar"><button class="updater-btn" data-updater-action="check">↻ Check for improvements</button></div>
+      ${withToolbar ? `<div class="updater-toolbar"><button class="updater-btn" data-updater-action="check">↻ Check for improvements</button></div>` : ''}
       <div class="updater-list">${rows}</div>`;
   }
 
diff --git a/containers/libreportal/frontend/themes/nebula/theme.css b/containers/libreportal/frontend/themes/nebula/theme.css
index d8a11f7..6519482 100644
--- a/containers/libreportal/frontend/themes/nebula/theme.css
+++ b/containers/libreportal/frontend/themes/nebula/theme.css
@@ -109,10 +109,15 @@
      1. .tab-navigation — main app tabs (Config / Services / …) and
         the Backup-location sub-tabs (Local / Remote 1 / Remote 2).
      2. .tabs-list inside .tabs-wrapper — config sub-tabs that the
-        app-config form renders inside the Config tab. */
+        app-config form renders inside the Config tab.
+     3. The fleet Overview's Backups tab, where the embedded BackupPage
+        sidebar is restyled into a nested horizontal strip + joined
+        content card (overview.css) — same surface, same anchor. */
 [data-theme="nebula"] .tab-navigation,
 [data-theme="nebula"] .tabs-wrapper .tabs-list,
-[data-theme="nebula"] .tabs-content {
+[data-theme="nebula"] .tabs-content,
+[data-theme="nebula"] #overview-view #ov-pane-backups .backup-layout > .sidebar #backup-sidebar-list,
+[data-theme="nebula"] #overview-view #ov-pane-backups .backup-layout > .main {
   background: var(--sidebar-bg);
 }