diff --git a/viz/app/item_page.js b/viz/app/item_page.js
index e83fbf5..9574d0b 100644
--- a/viz/app/item_page.js
+++ b/viz/app/item_page.js
@@ -231,9 +231,11 @@ export async function renderItem($app, skuInput) {
   `;
 
   document.getElementById("back").addEventListener("click", () => {
-    location.hash = "#/";
+    const last = sessionStorage.getItem("viz:lastRoute");
+    if (last && last !== location.hash) location.hash = last;
+    else location.hash = "#/";
   });
-
+  
   const $title = document.getElementById("title");
   const $links = document.getElementById("links");
   const $status = document.getElementById("status");
diff --git a/viz/app/search_page.js b/viz/app/search_page.js
index 9dfecc9..1fd8e42 100644
--- a/viz/app/search_page.js
+++ b/viz/app/search_page.js
@@ -131,7 +131,7 @@ export function renderSearch($app) {
                   <div class="itemName">${esc(it.name || "(no name)")}</div>
                   <a class="badge mono skuLink" href="${esc(
                     skuLink
-                  )}" onclick="event.stopPropagation()">${esc(displaySku(it.sku))}</a>
+                  )}" target="_blank" rel="noopener noreferrer" onclick="event.stopPropagation()">${esc(displaySku(it.sku))}</a>
                 </div>
                 <div class="metaRow">
                   <span class="mono price">${esc(price)}</span>
@@ -149,6 +149,7 @@ export function renderSearch($app) {
         const sku = el.getAttribute("data-sku") || "";
         if (!sku) return;
         saveQuery($q.value);
+        sessionStorage.setItem("viz:lastRoute", location.hash);
         location.hash = `#/item/${encodeURIComponent(sku)}`;
       });
     }
@@ -419,7 +420,7 @@ export function renderSearch($app) {
                     <div class="itemName">${esc(r.name || "(no name)")}</div>
                     <a class="badge mono skuLink" href="${esc(
                       skuLink
-                    )}" onclick="event.stopPropagation()">${esc(displaySku(sku))}</a>
+                    )}" target="_blank" rel="noopener noreferrer" onclick="event.stopPropagation()">${esc(displaySku(sku))}</a>
                   </div>
                   <div class="metaRow">
                     <span class="badge"${kindBadgeStyle}>${esc(kindLabel)}</span>
@@ -440,6 +441,7 @@ export function renderSearch($app) {
         const sku = el.getAttribute("data-sku") || "";
         if (!sku) return;
         saveQuery($q.value);
+        sessionStorage.setItem("viz:lastRoute", location.hash);
         location.hash = `#/item/${encodeURIComponent(sku)}`;
       });
     }
diff --git a/viz/app/store_page.js b/viz/app/store_page.js
index 52a89db..c13abb8 100644
--- a/viz/app/store_page.js
+++ b/viz/app/store_page.js
@@ -69,7 +69,10 @@ export async function renderStore($app, storeLabelRaw) {
     </div>
   `;
 
-  document.getElementById("back").addEventListener("click", () => (location.hash = "#/"));
+  document.getElementById("back").addEventListener("click", () => {
+    sessionStorage.setItem("viz:lastRoute", location.hash);
+    location.hash = "#/"
+});
 
   const $q = document.getElementById("q");
   const $status = document.getElementById("status");
@@ -230,7 +233,7 @@ export async function renderStore($app, storeLabelRaw) {
           <div class="itemBody">
             <div class="itemTop">
               <div class="itemName">${esc(it.name || "(no name)")}</div>
-              <a class="badge mono skuLink" href="${esc(skuLink)}" onclick="event.stopPropagation()">${esc(
+              <a class="badge mono skuLink" target="_blank" rel="noopener noreferrer" href="${esc(skuLink)}" onclick="event.stopPropagation()">${esc(
                 displaySku(it.sku)
               )}</a>
             </div>
@@ -294,6 +297,7 @@ export async function renderStore($app, storeLabelRaw) {
     if (!el) return;
     const sku = el.getAttribute("data-sku") || "";
     if (!sku) return;
+    sessionStorage.setItem("viz:lastRoute", location.hash);
     location.hash = `#/item/${encodeURIComponent(sku)}`;
   });
 
diff --git a/viz/style.css b/viz/style.css
index c03734e..51f5c65 100644
--- a/viz/style.css
+++ b/viz/style.css
@@ -245,12 +245,15 @@ a.skuLink:hover { text-decoration: underline; cursor: pointer; }
   margin-top: 12px; /* slightly more gap from the top text */
 }
 
-.storeBar {
-  display: flex;
-  gap: 8px;
-  flex-wrap: wrap;
+.storeBar{
+  display:flex;
+  gap:8px;
+  flex-wrap:wrap;
+  width:100%;
+  justify-content: space-between; /* spread each row to fill */
 }
 
+
 .storeBtn {
   border: 1px solid var(--border);
   background: #0f1318;