diff --git a/src/popup/index.html b/src/popup/index.html
index 336431c..2dcb560 100644
--- a/src/popup/index.html
+++ b/src/popup/index.html
@@ -1064,87 +1064,134 @@
                 <h2 id="tx-detail-heading" class="font-bold mb-2">
                     Transaction
                 </h2>
-                <div id="tx-detail-type-section" class="mb-4 hidden">
-                    <div class="text-xs text-muted mb-1">Type</div>
-                    <div id="tx-detail-type" class="text-xs font-bold"></div>
-                </div>
-                <div class="mb-4">
-                    <div class="text-xs text-muted mb-1">Status</div>
-                    <div id="tx-detail-status" class="text-xs"></div>
-                </div>
-                <div class="mb-4">
-                    <div class="text-xs text-muted mb-1">Time</div>
-                    <div id="tx-detail-time" class="text-xs"></div>
-                </div>
-                <div class="mb-4">
-                    <div class="text-xs text-muted mb-1">Amount</div>
-                    <div id="tx-detail-value" class="text-xs"></div>
-                </div>
-                <div class="mb-4 hidden">
-                    <div class="text-xs text-muted mb-1">Native quantity</div>
-                    <div id="tx-detail-native" class="text-xs"></div>
-                </div>
-                <div class="mb-4">
-                    <div class="text-xs text-muted mb-1">From</div>
-                    <div id="tx-detail-from" class="text-xs break-all"></div>
-                </div>
-                <div class="mb-4">
-                    <div class="text-xs text-muted mb-1">To</div>
-                    <div id="tx-detail-to" class="text-xs break-all"></div>
-                </div>
-                <div id="tx-detail-token-contract-section" class="mb-4 hidden">
-                    <div class="text-xs text-muted mb-1">Token contract</div>
-                    <div
-                        id="tx-detail-token-contract"
-                        class="text-xs break-all"
-                    ></div>
-                </div>
-                <div id="tx-detail-calldata-section" class="mb-4 hidden">
-                    <div
-                        id="tx-detail-calldata-well"
-                        class="mb-3 border border-border border-dashed p-2"
-                    >
-                        <div class="text-xs text-muted mb-1">Action</div>
+
+                <!-- ── Identity ── -->
+                <div class="tx-detail-group mb-1">
+                    <div class="mb-3">
+                        <div class="text-xs text-muted mb-1">
+                            Transaction hash
+                        </div>
                         <div
-                            id="tx-detail-calldata-action"
-                            class="text-xs font-bold mb-2"
+                            id="tx-detail-hash"
+                            class="text-xs break-all"
                         ></div>
+                    </div>
+                    <div id="tx-detail-type-section" class="mb-3 hidden">
+                        <div class="text-xs text-muted mb-1">Type</div>
                         <div
-                            id="tx-detail-calldata-details"
-                            class="text-xs"
+                            id="tx-detail-type"
+                            class="text-xs font-bold"
+                        ></div>
+                    </div>
+                    <div class="mb-3">
+                        <div class="text-xs text-muted mb-1">Status</div>
+                        <div id="tx-detail-status" class="text-xs"></div>
+                    </div>
+                    <div class="mb-1">
+                        <div class="text-xs text-muted mb-1">Time</div>
+                        <div id="tx-detail-time" class="text-xs"></div>
+                    </div>
+                </div>
+
+                <!-- ── Value ── -->
+                <div class="tx-detail-group mb-1">
+                    <div class="mb-3">
+                        <div class="text-xs text-muted mb-1">Amount</div>
+                        <div id="tx-detail-value" class="text-xs"></div>
+                    </div>
+                    <div class="mb-3 hidden">
+                        <div class="text-xs text-muted mb-1">
+                            Native quantity
+                        </div>
+                        <div id="tx-detail-native" class="text-xs"></div>
+                    </div>
+                    <div
+                        id="tx-detail-token-contract-section"
+                        class="mb-1 hidden"
+                    >
+                        <div class="text-xs text-muted mb-1">
+                            Token contract
+                        </div>
+                        <div
+                            id="tx-detail-token-contract"
+                            class="text-xs break-all"
                         ></div>
                     </div>
                 </div>
-                <div class="mb-4">
-                    <div class="text-xs text-muted mb-1">Transaction hash</div>
-                    <div id="tx-detail-hash" class="text-xs break-all"></div>
+
+                <!-- ── Parties ── -->
+                <div class="tx-detail-group mb-1">
+                    <div class="mb-3">
+                        <div class="text-xs text-muted mb-1">From</div>
+                        <div
+                            id="tx-detail-from"
+                            class="text-xs break-all"
+                        ></div>
+                    </div>
+                    <div class="mb-1">
+                        <div class="text-xs text-muted mb-1">To</div>
+                        <div id="tx-detail-to" class="text-xs break-all"></div>
+                    </div>
                 </div>
-                <div id="tx-detail-block-section" class="mb-4 hidden">
-                    <div class="text-xs text-muted mb-1">Block</div>
-                    <div id="tx-detail-block" class="text-xs"></div>
+
+                <!-- ── Protocol ── -->
+                <div id="tx-detail-calldata-section" class="mb-1 hidden">
+                    <div class="tx-detail-group mb-1">
+                        <div
+                            id="tx-detail-calldata-well"
+                            class="border border-border border-dashed p-2"
+                        >
+                            <div class="text-xs text-muted mb-1">Action</div>
+                            <div
+                                id="tx-detail-calldata-action"
+                                class="text-xs font-bold mb-2"
+                            ></div>
+                            <div
+                                id="tx-detail-calldata-details"
+                                class="text-xs"
+                            ></div>
+                        </div>
+                    </div>
                 </div>
-                <div id="tx-detail-nonce-section" class="mb-4 hidden">
-                    <div class="text-xs text-muted mb-1">Nonce</div>
-                    <div id="tx-detail-nonce" class="text-xs"></div>
-                </div>
-                <div id="tx-detail-fee-section" class="mb-4 hidden">
-                    <div class="text-xs text-muted mb-1">Transaction fee</div>
-                    <div id="tx-detail-fee" class="text-xs"></div>
-                </div>
-                <div id="tx-detail-gasprice-section" class="mb-4 hidden">
-                    <div class="text-xs text-muted mb-1">Gas price</div>
-                    <div id="tx-detail-gasprice" class="text-xs"></div>
-                </div>
-                <div id="tx-detail-gasused-section" class="mb-4 hidden">
-                    <div class="text-xs text-muted mb-1">Gas used</div>
-                    <div id="tx-detail-gasused" class="text-xs"></div>
+
+                <!-- ── On-chain details ── -->
+                <div
+                    id="tx-detail-onchain-group"
+                    class="tx-detail-group mb-1 hidden"
+                >
+                    <div id="tx-detail-block-section" class="mb-3 hidden">
+                        <div class="text-xs text-muted mb-1">Block</div>
+                        <div id="tx-detail-block" class="text-xs"></div>
+                    </div>
+                    <div id="tx-detail-nonce-section" class="mb-3 hidden">
+                        <div class="text-xs text-muted mb-1">Nonce</div>
+                        <div id="tx-detail-nonce" class="text-xs"></div>
+                    </div>
+                    <div id="tx-detail-fee-section" class="mb-3 hidden">
+                        <div class="text-xs text-muted mb-1">
+                            Transaction fee
+                        </div>
+                        <div id="tx-detail-fee" class="text-xs"></div>
+                    </div>
+                    <div id="tx-detail-gasprice-section" class="mb-3 hidden">
+                        <div class="text-xs text-muted mb-1">Gas price</div>
+                        <div id="tx-detail-gasprice" class="text-xs"></div>
+                    </div>
+                    <div id="tx-detail-gasused-section" class="mb-1 hidden">
+                        <div class="text-xs text-muted mb-1">Gas used</div>
+                        <div id="tx-detail-gasused" class="text-xs"></div>
+                    </div>
                 </div>
+
+                <!-- ── Raw data ── -->
                 <div id="tx-detail-rawdata-section" class="mb-4 hidden">
-                    <div class="text-xs text-muted mb-1">Raw data</div>
-                    <div
-                        id="tx-detail-rawdata"
-                        class="text-xs break-all font-mono border border-border border-dashed p-2"
-                    ></div>
+                    <div class="tx-detail-group">
+                        <div class="text-xs text-muted mb-1">Raw data</div>
+                        <div
+                            id="tx-detail-rawdata"
+                            class="text-xs break-all font-mono border border-border border-dashed p-2"
+                        ></div>
+                    </div>
                 </div>
             </div>
 
diff --git a/src/popup/styles/main.css b/src/popup/styles/main.css
index f0b3a24..b1f2833 100644
--- a/src/popup/styles/main.css
+++ b/src/popup/styles/main.css
@@ -44,3 +44,11 @@ body {
         background-color 225ms ease-out,
         color 225ms ease-out;
 }
+
+/* Transaction detail view — visual grouping of related fields */
+.tx-detail-group {
+    border-bottom: 1px solid var(--color-border-light);
+    padding-bottom: 0.5rem;
+    margin-bottom: 0.5rem;
+    padding-top: 0.25rem;
+}
diff --git a/src/popup/views/transactionDetail.js b/src/popup/views/transactionDetail.js
index f7fcee4..80ec0e3 100644
--- a/src/popup/views/transactionDetail.js
+++ b/src/popup/views/transactionDetail.js
@@ -190,7 +190,9 @@ function render() {
     const rawDataSection = $("tx-detail-rawdata-section");
     if (rawDataSection) rawDataSection.classList.add("hidden");
 
-    // Hide on-chain detail sections until populated
+    // Hide on-chain detail sections (and their group wrapper) until populated
+    const onchainGroup = $("tx-detail-onchain-group");
+    if (onchainGroup) onchainGroup.classList.add("hidden");
     for (const id of [
         "tx-detail-block-section",
         "tx-detail-nonce-section",
@@ -285,6 +287,24 @@ function populateOnChainDetails(txData) {
         );
     }
 
+    // Show the on-chain details group if any child section is visible
+    const onchainGroup = $("tx-detail-onchain-group");
+    if (onchainGroup) {
+        const hasVisible = [
+            "tx-detail-block-section",
+            "tx-detail-nonce-section",
+            "tx-detail-fee-section",
+            "tx-detail-gasprice-section",
+            "tx-detail-gasused-section",
+        ].some((id) => {
+            const el = $(id);
+            return el && !el.classList.contains("hidden");
+        });
+        if (hasVisible) {
+            onchainGroup.classList.remove("hidden");
+        }
+    }
+
     // Bind copy handlers for newly added elements
     for (const id of [
         "tx-detail-block-section",