diff --git a/frontend/src/lib/components/ArticleCard.svelte b/frontend/src/lib/components/ArticleCard.svelte
index a917f44..82a8958 100644
--- a/frontend/src/lib/components/ArticleCard.svelte
+++ b/frontend/src/lib/components/ArticleCard.svelte
@@ -1,5 +1,12 @@
 <script>
-  let { article, onaction, onreplace, hero = false } = $props();
+  let { article, onaction, onreplace, ontag, hero = false } = $props();
+
+  const humanize = (s) => (s || '').replace(/-/g, ' ');
+  // Grouping tags are the doorways; cap at 3 so cards stay calm. Fall back to
+  // the primary topic for articles the re-tag hasn't reached yet.
+  let pills = $derived(
+    (article.tags?.length ? article.tags : article.topic ? [article.topic] : []).slice(0, 3)
+  );
 
   // Reset image-failure when the article changes (cards swap in place).
   let failed = $state(false);
@@ -34,8 +41,13 @@
 
   <div class="body">
     <div class="tags">
-      {#if article.topic}<span class="tag">{article.topic}</span>{/if}
-      {#if article.flavor}<span class="tag soft">{article.flavor}</span>{/if}
+      {#each pills as t, i (t)}
+        {#if ontag}
+          <button type="button" class="tag" class:soft={i > 0} onclick={() => ontag(t)}>{humanize(t)}</button>
+        {:else}
+          <span class="tag" class:soft={i > 0}>{humanize(t)}</span>
+        {/if}
+      {/each}
     </div>
     <div class="src">{article.source}</div>
 
@@ -79,13 +91,17 @@
   }
 
   .body { padding: 16px 18px 14px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
-  .tags { display: flex; align-items: center; gap: 7px; flex-wrap: wrap; font-size: 0.66rem; }
+  .tags { display: flex; align-items: center; gap: 7px; flex-wrap: wrap; }
   .tag {
-    background: var(--accent); color: #fff; border-radius: 999px;
-    padding: 3px 11px 2px; font-family: var(--label); font-weight: 300;
-    text-transform: uppercase; letter-spacing: 0.055em;
+    background: var(--accent); color: #fff; border: none; border-radius: 999px;
+    padding: 3px 11px 2px; font-family: var(--label); font-weight: 300; font-size: 0.66rem;
+    text-transform: uppercase; letter-spacing: 0.055em; line-height: 1.5;
+    transition: background 0.14s ease, color 0.14s ease;
   }
   .tag.soft { background: var(--accent-soft); color: var(--accent-deep); }
+  button.tag { cursor: pointer; }
+  button.tag:hover { background: var(--accent-deep); color: #fff; }
+  button.tag.soft:hover { background: var(--accent); color: #fff; }
   /* Source on its own line below the tags, left-justified, for uniformity. */
   .src { color: var(--muted); font-size: 0.78rem; margin: -2px 0 2px; }
 
diff --git a/frontend/src/routes/+page.svelte b/frontend/src/routes/+page.svelte
index b0d1925..3d8f195 100644
--- a/frontend/src/routes/+page.svelte
+++ b/frontend/src/routes/+page.svelte
@@ -10,7 +10,8 @@
 
   let moods = $state([]);
   let topics = $state([]);
-  let selected = $state('today'); // 'today' | a mood key | a topic key
+  let families = $state([]);
+  let selected = $state('today'); // 'today' | a mood key | a topic key | 'tag:<slug>'
   let brief = $state(null);
   let feed = $state([]);
   let userPrefs = $state(P.blank());
@@ -61,16 +62,28 @@
   }
 
   const cap = (s) => (s ? s[0].toUpperCase() + s.slice(1) : s);
+  const humanize = (s) => (s || '').replace(/-/g, ' ');
   let filtersOn = $derived(P.active(userPrefs));
   let currentMood = $derived(moods.find((m) => m.key === selected));
   let currentTopic = $derived(topics.find((t) => t.key === selected));
+  let currentTag = $derived(selected.startsWith('tag:') ? selected.slice(4) : null);
+  // The family a grouping tag belongs to — for the lane's calm subtitle.
+  let tagFamily = $derived(
+    currentTag ? families.find((f) => f.tags.some((t) => t.key === currentTag)) : null
+  );
   let viewLabel = $derived(
-    selected === 'today' ? 'Highlights from Today' : (currentMood?.label ?? cap(currentTopic?.key) ?? '')
+    selected === 'today'
+      ? 'Highlights from Today'
+      : currentTag
+        ? humanize(currentTag)
+        : (currentMood?.label ?? cap(currentTopic?.key) ?? '')
   );
   let viewSubtitle = $derived(
     selected === 'today'
       ? (brief?.brief_date ?? '')
-      : (currentMood?.description ?? currentTopic?.description ?? '')
+      : currentTag
+        ? (tagFamily?.description ?? '')
+        : (currentMood?.description ?? currentTopic?.description ?? '')
   );
   let activeTab = $derived(showYou ? 'you' : selected === 'today' ? 'today' : 'browse');
 
@@ -108,6 +121,12 @@
     try {
       if (key === 'today') {
         await loadToday(fresh);
+      } else if (key.startsWith('tag:')) {
+        const tag = key.slice(4);
+        const q = P.param(userPrefs);
+        const ex = Array.from(dismissed).join(',');
+        feed = (await getJSON(`/api/feed?limit=24&tag=${encodeURIComponent(tag)}${q ? '&' + q : ''}${ex ? '&exclude=' + ex : ''}`)).items;
+        remember(feed);
       } else {
         const q = P.param(P.merge(userPrefs, viewFilter(key)));
         const ex = Array.from(dismissed).join(',');
@@ -189,6 +208,10 @@
     try {
       moods = await getJSON('/api/moods');
       topics = (await getJSON('/api/categories')).topics;
+      // Non-fatal: the groupings backend (B1) may not be deployed yet. If it
+      // isn't, the Explore-by-family section simply stays hidden and cards fall
+      // back to the topic pill — the rest of the page works unchanged.
+      try { families = await getJSON('/api/families'); } catch { families = []; }
       await select('today');
     } catch (e) {
       error = 'Could not reach Upbeat Bytes.';
@@ -258,11 +281,11 @@
       {#if selected === 'today'}
         {#if brief?.items?.length}
           <section class="rise">
-            <ArticleCard article={brief.items[0]} hero onaction={applyAction} onreplace={replaceArticle} />
+            <ArticleCard article={brief.items[0]} hero onaction={applyAction} onreplace={replaceArticle} ontag={(t) => select('tag:' + t)} />
             {#if brief.items.length > 1}
               <div class="grid rest">
                 {#each brief.items.slice(1) as a (a.id)}
-                  <ArticleCard article={a} onaction={applyAction} onreplace={replaceArticle} />
+                  <ArticleCard article={a} onaction={applyAction} onreplace={replaceArticle} ontag={(t) => select('tag:' + t)} />
                 {/each}
               </div>
             {/if}
@@ -274,7 +297,7 @@
       {:else if feed.length}
         <div class="grid rise">
           {#each feed as a (a.id)}
-            <ArticleCard article={a} onaction={applyAction} onreplace={replaceArticle} />
+            <ArticleCard article={a} onaction={applyAction} onreplace={replaceArticle} ontag={(t) => select('tag:' + t)} />
           {/each}
         </div>
       {:else}
@@ -282,12 +305,27 @@
       {/if}
     {/key}
 
-    {#if topics.length}
+    {#if families.length}
       <section id="explore" class="explore">
-        <h2>Explore by topic</h2>
-        <div class="chips">
-          {#each topics as t (t.key)}
-            <button class="chip" class:active={selected === t.key} onclick={() => select(t.key)}>{cap(t.key)}</button>
+        <h2>Explore Upbeat Bytes</h2>
+        <div class="families">
+          {#each families as f (f.name)}
+            {@const tags = f.tags.filter((t) => t.count > 0)}
+            {#if tags.length}
+              <div class="family">
+                <h3>{f.name}</h3>
+                <p class="fdesc">{f.description}</p>
+                <div class="chips">
+                  {#each tags as t (t.key)}
+                    <button
+                      class="chip"
+                      class:active={selected === 'tag:' + t.key}
+                      onclick={() => select('tag:' + t.key)}
+                    >{humanize(t.key)}</button>
+                  {/each}
+                </div>
+              </div>
+            {/if}
           {/each}
         </div>
       </section>
@@ -308,17 +346,21 @@
     background: var(--accent); border-radius: 2px; margin-top: 14px; opacity: 0.8;
   }
 
-  /* Explore by topic — a quiet secondary discovery section, not a nav row. */
-  .explore { margin: 48px 0 8px; padding-top: 26px; border-top: 1px solid var(--line); }
+  /* Explore — a quiet repository of groupings beneath the brief, not a nav row.
+     Four calm families, each a doorway into its tags. */
+  .explore { margin: 52px 0 8px; padding-top: 28px; border-top: 1px solid var(--line); }
   .explore h2 {
-    font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.12em;
-    color: var(--muted); font-family: var(--sans); font-weight: 700; margin: 0 0 12px;
+    font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.14em;
+    color: var(--muted); font-family: var(--label); font-weight: 400; margin: 0 0 22px;
   }
-  .explore .chips { display: flex; flex-wrap: wrap; gap: 8px; }
+  .families { display: grid; grid-template-columns: repeat(auto-fit, minmax(248px, 1fr)); gap: 26px 32px; }
+  .family h3 { font-size: 1.16rem; margin: 0 0 2px; }
+  .family .fdesc { margin: 0 0 11px; color: var(--muted); font-size: 0.86rem; line-height: 1.45; }
+  .explore .chips { display: flex; flex-wrap: wrap; gap: 7px; }
   .explore .chip {
     border: 1px solid var(--line); background: var(--surface); color: var(--ink);
-    border-radius: 999px; padding: 7px 15px; font-size: 0.9rem; cursor: pointer; transition: all 0.14s ease;
-    text-transform: capitalize;
+    border-radius: 999px; padding: 5px 13px; font-size: 0.82rem; cursor: pointer;
+    transition: all 0.14s ease; text-transform: capitalize;
   }
   .explore .chip:hover { border-color: var(--accent); color: var(--accent-deep); }
   .explore .chip.active { background: var(--accent); border-color: var(--accent); color: #fff; }