Stretch container overview panels to fill remaining viewport height.

Make the overview tab body, card, and section grid grow with the details
shell so Identity/Runtime/Network and related panels use empty vertical
space instead of sitting in a short content-sized block.

ui/modern.css

@@ -854,6 +854,37 @@ body {
   overflow: hidden;
 }
 
+/* Overview tab: stretch card + panels through remaining viewport height */
+#container-details-view #overview-pane.tab-pane.show.active {
+  display: flex !important;
+  flex-direction: column;
+  flex: 1 1 auto;
+  min-height: 0;
+  height: 100%;
+}
+
+#container-details-view #overview-pane .detail-tab-body {
+  flex: 1 1 auto;
+  min-height: 0;
+  height: 100%;
+  overflow: hidden;
+}
+
+#container-details-view #overview-pane .detail-overview-card,
+#container-details-view #overview-pane .detail-section-card--flat {
+  flex: 1 1 auto;
+  min-height: 0;
+  height: 100%;
+  display: flex;
+  flex-direction: column;
+}
+
+#container-details-view #overview-pane .detail-overview-panels {
+  flex: 1 1 auto;
+  min-height: 0;
+  grid-template-rows: 1fr 1fr;
+}
+
 #container-details-view .detail-fill-panel,
 #container-details-view #logs-pane > .detail-fill-panel,
 #container-details-view #terminal-pane > .detail-fill-panel {

ui/styles.css

@@ -3382,9 +3382,21 @@
       gap: 8px;
     }
 
+    /* Overview: fill remaining viewport; panels stretch (scroll only if needed) */
+    #overview-pane.tab-pane.show.active {
+      display: flex;
+      flex-direction: column;
+      flex: 1 1 auto;
+      min-height: 0;
+    }
+
     #overview-pane .detail-tab-body {
-      overflow-y: auto;
-      overflow-x: hidden;
+      flex: 1 1 auto;
+      min-height: 0;
+      height: 100%;
+      display: flex;
+      flex-direction: column;
+      overflow: hidden;
     }
 
     .detail-tab-body.detail-scroll-body,
@@ -3550,12 +3562,24 @@
       font-size: 0.7rem;
     }
 
-    /* Overview compact key/value grid */
+    /* Overview compact key/value grid — card fills tab body height */
     .detail-overview-card {
       display: flex;
       flex-direction: column;
       gap: 10px;
       min-height: 0;
+      flex: 1 1 auto;
+      height: 100%;
+    }
+
+    #overview-pane .detail-section-card.detail-section-card--flat,
+    #overview-pane .detail-overview-card {
+      flex: 1 1 auto;
+      min-height: 0;
+      height: 100%;
+      display: flex;
+      flex-direction: column;
+      margin-bottom: 0;
     }
 
     .detail-overview-hero {
@@ -3664,25 +3688,31 @@
       line-height: 1.2;
     }
 
-    /* Multi-panel body */
+    /* Multi-panel body — grows to fill leftover vertical space */
     .detail-overview-panels {
       display: grid;
       grid-template-columns: repeat(3, minmax(0, 1fr));
+      grid-template-rows: 1fr 1fr;
       gap: 8px 10px;
       min-height: 0;
       flex: 1 1 auto;
+      align-content: stretch;
     }
 
     .detail-overview-section {
       min-width: 0;
-      padding: 6px 8px;
+      min-height: 0;
+      height: 100%;
+      padding: 8px 10px;
       border-radius: 8px;
       background: rgba(255, 255, 255, 0.02);
       border: 1px solid rgba(255, 255, 255, 0.05);
+      display: flex;
+      flex-direction: column;
     }
 
     .detail-overview-section-title {
-      margin: 0 0 4px;
+      margin: 0 0 6px;
       font-size: 0.6875rem;
       font-weight: 700;
       text-transform: uppercase;
@@ -3691,6 +3721,14 @@
       display: flex;
       align-items: center;
       gap: 6px;
+      flex-shrink: 0;
+    }
+
+    .detail-overview-section .detail-kv-grid,
+    .detail-overview-section .detail-chip-row,
+    .detail-overview-section > .text-muted {
+      flex: 1 1 auto;
+      min-height: 0;
     }
 
     .detail-overview-section-title i {
@@ -3854,6 +3892,7 @@
     @media (max-width: 1100px) {
       .detail-overview-panels {
         grid-template-columns: repeat(2, minmax(0, 1fr));
+        grid-template-rows: repeat(3, 1fr);
       }
       .detail-metric-row {
         grid-template-columns: repeat(3, minmax(0, 1fr));
@@ -3861,8 +3900,14 @@
     }
 
     @media (max-width: 640px) {
+      #overview-pane .detail-tab-body {
+        overflow-y: auto;
+      }
       .detail-overview-panels {
         grid-template-columns: 1fr;
+        grid-template-rows: none;
+        grid-auto-rows: auto;
+        flex: 0 0 auto;
       }
       .detail-metric-row {
         grid-template-columns: repeat(2, minmax(0, 1fr));