diff --git a/frontend/src/components/CollectionsView.jsx b/frontend/src/components/CollectionsView.jsx
index bd542e7..48e4271 100644
--- a/frontend/src/components/CollectionsView.jsx
+++ b/frontend/src/components/CollectionsView.jsx
@@ -1,15 +1,25 @@
-import { useState, useEffect, useCallback } from 'react'
-import { listCollections, createCollection, getCollection } from '../api.js'
+import { useState, useEffect, useCallback, useRef } from 'react'
+import {
+  listCollections, createCollection, getCollection,
+  addEntryToCollection, removeEntryFromCollection,
+  updateEntryVisibility, updateCollection, deleteCollection,
+} from '../api.js'
 
-const VIS_LABELS = { 0: 'Private', 1: 'Public', 2: 'Users only', 3: 'Public' }
+const VIS_OPTIONS = [
+  { value: 0, label: 'Private' },
+  { value: 2, label: 'Users only' },
+  { value: 3, label: 'Public' },
+]
+const VIS_LABEL = v => VIS_OPTIONS.find(o => o.value === v)?.label ?? String(v)
 
 export default function CollectionsView({ archiveId }) {
   const [collections, setCollections] = useState([])
   const [loading, setLoading] = useState(false)
   const [error, setError] = useState(null)
-  const [selectedColl, setSelectedColl] = useState(null)
+  const [selectedUid, setSelectedUid] = useState(null)
   const [collDetail, setCollDetail] = useState(null)
   const [detailLoading, setDetailLoading] = useState(false)
+  const [detailError, setDetailError] = useState(null)
 
   // Create form
   const [newName, setNewName] = useState('')
@@ -18,7 +28,21 @@ export default function CollectionsView({ archiveId }) {
   const [creating, setCreating] = useState(false)
   const [createError, setCreateError] = useState(null)
 
-  const refresh = useCallback(async () => {
+  // Add-entry form
+  const [addUid, setAddUid] = useState('')
+  const [addVis, setAddVis] = useState(2)
+  const [adding, setAdding] = useState(false)
+  const [addError, setAddError] = useState(null)
+
+  // Inline rename state
+  const [renaming, setRenaming] = useState(false)
+  const [renameVal, setRenameVal] = useState('')
+  const renameRef = useRef(null)
+
+  const selected = collections.find(c => c.collection_uid === selectedUid) ?? null
+  const isDefault = selected?.slug === '_default_'
+
+  const refreshList = useCallback(async () => {
     if (!archiveId) return
     setLoading(true)
     setError(null)
@@ -32,16 +56,25 @@ export default function CollectionsView({ archiveId }) {
     }
   }, [archiveId])
 
-  useEffect(() => { refresh() }, [refresh])
-
-  useEffect(() => {
-    if (!selectedColl) { setCollDetail(null); return }
+  const refreshDetail = useCallback(async (uid) => {
+    if (!uid) { setCollDetail(null); return }
     setDetailLoading(true)
-    getCollection(archiveId, selectedColl.collection_uid)
-      .then(d => setCollDetail(d))
-      .catch(e => setError(e.message))
-      .finally(() => setDetailLoading(false))
-  }, [selectedColl, archiveId])
+    setDetailError(null)
+    try {
+      const d = await getCollection(archiveId, uid)
+      setCollDetail(d)
+    } catch (e) {
+      setDetailError(e.message)
+    } finally {
+      setDetailLoading(false)
+    }
+  }, [archiveId])
+
+  useEffect(() => { refreshList() }, [refreshList])
+  useEffect(() => { refreshDetail(selectedUid) }, [selectedUid, refreshDetail])
+
+  // Auto-focus rename input
+  useEffect(() => { if (renaming && renameRef.current) renameRef.current.focus() }, [renaming])
 
   async function handleCreate(e) {
     e.preventDefault()
@@ -51,11 +84,12 @@ export default function CollectionsView({ archiveId }) {
     setCreating(true)
     setCreateError(null)
     try {
-      await createCollection(archiveId, name, slug, newVis)
+      const coll = await createCollection(archiveId, name, slug, newVis)
       setNewName('')
       setNewSlug('')
       setNewVis(2)
-      await refresh()
+      await refreshList()
+      setSelectedUid(coll.collection_uid)
     } catch (err) {
       setCreateError(err.message)
     } finally {
@@ -63,71 +97,240 @@ export default function CollectionsView({ archiveId }) {
     }
   }
 
+  async function handleRenameCommit() {
+    const name = renameVal.trim()
+    if (!name || !selected) { setRenaming(false); return }
+    try {
+      await updateCollection(archiveId, selected.collection_uid, { name })
+      await refreshList()
+      setCollDetail(d => d ? { ...d, name } : d)
+    } catch (e) {
+      setError(e.message)
+    } finally {
+      setRenaming(false)
+    }
+  }
+
+  async function handleVisChange(newVisVal) {
+    if (!selected) return
+    try {
+      await updateCollection(archiveId, selected.collection_uid, { default_visibility_bits: newVisVal })
+      await refreshList()
+      setCollDetail(d => d ? { ...d, default_visibility_bits: newVisVal } : d)
+    } catch (e) {
+      setError(e.message)
+    }
+  }
+
+  async function handleDelete() {
+    if (!selected) return
+    if (!window.confirm(`Delete collection "${selected.name}"? Entries will not be deleted.`)) return
+    try {
+      await deleteCollection(archiveId, selected.collection_uid)
+      setSelectedUid(null)
+      setCollDetail(null)
+      await refreshList()
+    } catch (e) {
+      setError(e.message)
+    }
+  }
+
+  async function handleAddEntry(e) {
+    e.preventDefault()
+    const uid = addUid.trim()
+    if (!uid || !selected) return
+    setAdding(true)
+    setAddError(null)
+    try {
+      await addEntryToCollection(archiveId, selected.collection_uid, uid, addVis)
+      setAddUid('')
+      await refreshDetail(selected.collection_uid)
+    } catch (err) {
+      setAddError(err.message)
+    } finally {
+      setAdding(false)
+    }
+  }
+
+  async function handleRemoveEntry(entryUid) {
+    if (!selected) return
+    try {
+      await removeEntryFromCollection(archiveId, selected.collection_uid, entryUid)
+      await refreshDetail(selected.collection_uid)
+    } catch (e) {
+      setDetailError(e.message)
+    }
+  }
+
+  async function handleEntryVisChange(entryUid, vis) {
+    if (!selected) return
+    try {
+      await updateEntryVisibility(archiveId, selected.collection_uid, entryUid, vis)
+      setCollDetail(d => d ? {
+        ...d,
+        entries: d.entries.map(en =>
+          en.entry_uid === entryUid ? { ...en, collection_visibility_bits: vis } : en
+        ),
+      } : d)
+    } catch (e) {
+      setDetailError(e.message)
+    }
+  }
+
   if (!archiveId) return <div className="view-placeholder">Select an archive.</div>
 
   return (
     <div className="collections-view">
-      <h2 className="view-heading">Collections</h2>
+      <h2 className="collections-heading">Collections</h2>
 
       {loading && <div className="muted">Loading…</div>}
-      {error && <div className="error-text">{error}</div>}
+      {error && <div className="collections-error">{error} <button onClick={() => setError(null)} className="coll-dismiss">×</button></div>}
 
       <div className="collections-layout">
-        <div className="collections-list">
+        {/* Sidebar */}
+        <div className="collections-sidebar">
           {collections.map(c => (
-            <div
+            <button
               key={c.collection_uid}
-              className={`collection-row${selectedColl?.collection_uid === c.collection_uid ? ' is-selected' : ''}`}
-              onClick={() => setSelectedColl(c)}
+              className={`coll-row${selectedUid === c.collection_uid ? ' is-active' : ''}`}
+              onClick={() => setSelectedUid(c.collection_uid)}
             >
-              <span className="collection-name">{c.name}</span>
-              <span className="muted" style={{ fontSize: '0.8em' }}>
-                {VIS_LABELS[c.default_visibility_bits] ?? c.default_visibility_bits}
-              </span>
-            </div>
+              <span className="coll-row-name">{c.name}</span>
+              <span className="coll-row-meta">{VIS_LABEL(c.default_visibility_bits)}</span>
+            </button>
           ))}
           {collections.length === 0 && !loading && (
-            <div className="muted">No collections yet.</div>
+            <div className="muted" style={{ padding: '8px 12px' }}>No collections yet.</div>
           )}
         </div>
 
-        {selectedColl && (
-          <div className="collection-detail">
-            <h3 className="collection-detail-name">{selectedColl.name}</h3>
-            <div className="muted" style={{ marginBottom: '0.75rem' }}>
-              Default visibility: {VIS_LABELS[selectedColl.default_visibility_bits] ?? selectedColl.default_visibility_bits}
-            </div>
-            {detailLoading ? (
-              <div className="muted">Loading entries…</div>
-            ) : collDetail ? (
-              collDetail.entries.length === 0 ? (
-                <div className="muted">No entries visible to you in this collection.</div>
+        {/* Detail pane */}
+        {selected ? (
+          <div className="coll-detail">
+            {/* Header */}
+            <div className="coll-detail-header">
+              {renaming ? (
+                <input
+                  ref={renameRef}
+                  className="coll-rename-input"
+                  value={renameVal}
+                  onChange={e => setRenameVal(e.target.value)}
+                  onBlur={handleRenameCommit}
+                  onKeyDown={e => {
+                    if (e.key === 'Enter') handleRenameCommit()
+                    if (e.key === 'Escape') setRenaming(false)
+                  }}
+                />
               ) : (
-                <ul className="collection-entries-list">
-                  {collDetail.entries.map(entry => (
-                    <li key={entry.entry_uid} className="collection-entry-item">
-                      <span className="entry-title">
-                        {entry.title || entry.entry_uid}
-                      </span>
-                      <span className="muted" style={{ fontSize: '0.8em' }}>
-                        {entry.source_kind}
-                      </span>
-                    </li>
-                  ))}
-                </ul>
-              )
-            ) : null}
+                <h3
+                  className={`coll-detail-name${isDefault ? '' : ' coll-detail-name--editable'}`}
+                  title={isDefault ? undefined : 'Click to rename'}
+                  onClick={() => { if (!isDefault) { setRenameVal(selected.name); setRenaming(true) } }}
+                >
+                  {collDetail?.name ?? selected.name}
+                  {!isDefault && <span className="coll-edit-hint"> ✎</span>}
+                </h3>
+              )}
+              {!isDefault && (
+                <button className="coll-delete-btn" onClick={handleDelete} title="Delete collection">Delete</button>
+              )}
+            </div>
+
+            {/* Visibility */}
+            <div className="coll-detail-vis">
+              <span className="coll-vis-label">Default visibility</span>
+              <select
+                className="coll-vis-select"
+                value={collDetail?.default_visibility_bits ?? selected.default_visibility_bits}
+                onChange={e => handleVisChange(Number(e.target.value))}
+                disabled={isDefault}
+              >
+                {VIS_OPTIONS.map(o => <option key={o.value} value={o.value}>{o.label}</option>)}
+              </select>
+            </div>
+
+            {/* Entries */}
+            <div className="coll-entries-section">
+              <div className="coll-section-heading">Entries</div>
+              {detailLoading && <div className="muted">Loading…</div>}
+              {detailError && <div className="collections-error">{detailError}</div>}
+              {!detailLoading && collDetail && (
+                collDetail.entries.length === 0 ? (
+                  <div className="muted">No entries in this collection.</div>
+                ) : (
+                  <ul className="coll-entries-list">
+                    {collDetail.entries.map(entry => (
+                      <li key={entry.entry_uid} className="coll-entry-row">
+                        <div className="coll-entry-info">
+                          <span className="coll-entry-title">{entry.title || entry.entry_uid}</span>
+                          <span className="coll-entry-kind muted">{entry.source_kind}</span>
+                        </div>
+                        <div className="coll-entry-actions">
+                          <select
+                            className="coll-entry-vis-select"
+                            value={entry.collection_visibility_bits}
+                            onChange={e => handleEntryVisChange(entry.entry_uid, Number(e.target.value))}
+                          >
+                            {VIS_OPTIONS.map(o => <option key={o.value} value={o.value}>{o.label}</option>)}
+                          </select>
+                          {!isDefault && (
+                            <button
+                              className="coll-entry-remove"
+                              onClick={() => handleRemoveEntry(entry.entry_uid)}
+                              title="Remove from collection"
+                            >×</button>
+                          )}
+                        </div>
+                      </li>
+                    ))}
+                  </ul>
+                )
+              )}
+            </div>
+
+            {/* Add entry (non-default only) */}
+            {!isDefault && (
+              <form className="coll-add-entry-form" onSubmit={handleAddEntry}>
+                <div className="coll-section-heading">Add entry</div>
+                <div className="coll-add-entry-row">
+                  <input
+                    className="coll-add-entry-input"
+                    type="text"
+                    value={addUid}
+                    onChange={e => setAddUid(e.target.value)}
+                    placeholder="entry_uid"
+                    required
+                  />
+                  <select
+                    className="coll-vis-select"
+                    value={addVis}
+                    onChange={e => setAddVis(Number(e.target.value))}
+                  >
+                    {VIS_OPTIONS.map(o => <option key={o.value} value={o.value}>{o.label}</option>)}
+                  </select>
+                  <button className="coll-add-btn" type="submit" disabled={adding}>
+                    {adding ? '…' : 'Add'}
+                  </button>
+                </div>
+                {addError && <div className="collections-error" style={{ marginTop: 4 }}>{addError}</div>}
+              </form>
+            )}
+          </div>
+        ) : (
+          <div className="coll-detail coll-detail--empty">
+            <div className="muted">Select a collection to view details.</div>
           </div>
         )}
       </div>
 
-      <details className="create-collection-form" style={{ marginTop: '1.5rem' }}>
+      {/* Create form */}
+      <details className="coll-create-details" style={{ marginTop: '1.5rem' }}>
         <summary style={{ cursor: 'pointer', fontWeight: 600 }}>Create collection</summary>
         <form onSubmit={handleCreate} style={{ marginTop: '0.75rem', display: 'flex', flexDirection: 'column', gap: '0.5rem', maxWidth: 400 }}>
           <label>
             Name
             <input
-              className="form-input"
+              className="capture-input"
               type="text"
               value={newName}
               onChange={e => { setNewName(e.target.value); if (!newSlug) setNewSlug(e.target.value.toLowerCase().replace(/[^a-z0-9]+/g, '-').replace(/^-|-$/g, '')) }}
@@ -138,7 +341,7 @@ export default function CollectionsView({ archiveId }) {
           <label>
             Slug
             <input
-              className="form-input"
+              className="capture-input"
               type="text"
               value={newSlug}
               onChange={e => setNewSlug(e.target.value)}
@@ -148,14 +351,12 @@ export default function CollectionsView({ archiveId }) {
           </label>
           <label>
             Default visibility
-            <select className="form-input" value={newVis} onChange={e => setNewVis(Number(e.target.value))}>
-              <option value={0}>Private (admin/owner only)</option>
-              <option value={2}>Users only (logged in)</option>
-              <option value={3}>Public</option>
+            <select className="capture-input" style={{ height: 42 }} value={newVis} onChange={e => setNewVis(Number(e.target.value))}>
+              {VIS_OPTIONS.map(o => <option key={o.value} value={o.value}>{o.label}</option>)}
             </select>
           </label>
-          {createError && <div className="muted" style={{ color: 'var(--accent)' }}>{createError}</div>}
-          <button className="btn" type="submit" disabled={creating}>
+          {createError && <div className="collections-error">{createError}</div>}
+          <button className="capture-submit" type="submit" disabled={creating} style={{ alignSelf: 'flex-start', padding: '8px 20px' }}>
             {creating ? 'Creating…' : 'Create'}
           </button>
         </form>
diff --git a/frontend/src/styles.css b/frontend/src/styles.css
index 8916da2..d5a2470 100644
--- a/frontend/src/styles.css
+++ b/frontend/src/styles.css
@@ -640,3 +640,291 @@ select {
   opacity: 0.45;
   cursor: default;
 }
+
+/* ── Collections view ─────────────────────────────────────────────────────── */
+
+.collections-view {
+  padding: 24px;
+}
+
+.collections-heading {
+  margin: 0 0 16px;
+  font-size: 22px;
+  font-family: Georgia, "Times New Roman", serif;
+}
+
+.collections-error {
+  color: var(--accent);
+  font-size: 13px;
+  margin-bottom: 8px;
+}
+
+.coll-dismiss {
+  background: none;
+  border: none;
+  cursor: pointer;
+  color: var(--accent);
+  font-size: 16px;
+  line-height: 1;
+  padding: 0 4px;
+}
+
+.collections-layout {
+  display: grid;
+  grid-template-columns: 220px 1fr;
+  gap: 0;
+  border: 1px solid var(--line);
+  min-height: 340px;
+}
+
+.collections-sidebar {
+  border-right: 1px solid var(--line);
+  overflow-y: auto;
+}
+
+.coll-row {
+  display: flex;
+  flex-direction: column;
+  width: 100%;
+  padding: 10px 14px;
+  border: none;
+  border-bottom: 1px solid var(--line-soft);
+  background: none;
+  cursor: pointer;
+  text-align: left;
+  gap: 2px;
+}
+
+.coll-row:hover {
+  background: var(--paper-2);
+}
+
+.coll-row.is-active {
+  background: var(--paper-2);
+  border-left: 3px solid var(--accent);
+}
+
+.coll-row-name {
+  font-size: 14px;
+  font-weight: 600;
+  color: var(--ink);
+}
+
+.coll-row-meta {
+  font-size: 11px;
+  color: var(--muted);
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+}
+
+.coll-detail {
+  padding: 20px 24px;
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+}
+
+.coll-detail--empty {
+  justify-content: center;
+  align-items: center;
+}
+
+.coll-detail-header {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+}
+
+.coll-detail-name {
+  margin: 0;
+  font-size: 18px;
+  font-family: Georgia, "Times New Roman", serif;
+  flex: 1;
+}
+
+.coll-detail-name--editable {
+  cursor: pointer;
+}
+
+.coll-detail-name--editable:hover {
+  color: var(--link);
+}
+
+.coll-edit-hint {
+  font-size: 14px;
+  opacity: 0.5;
+  margin-left: 4px;
+}
+
+.coll-rename-input {
+  flex: 1;
+  font-size: 16px;
+  font-family: Georgia, "Times New Roman", serif;
+  border: 2px solid var(--ink);
+  padding: 4px 8px;
+  background: var(--paper-3);
+  color: var(--ink);
+}
+
+.coll-delete-btn {
+  border: 1px solid var(--accent);
+  background: none;
+  color: var(--accent);
+  padding: 5px 12px;
+  font-size: 13px;
+  cursor: pointer;
+}
+
+.coll-delete-btn:hover {
+  background: var(--accent);
+  color: var(--paper);
+}
+
+.coll-detail-vis {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+}
+
+.coll-vis-label {
+  font-size: 13px;
+  font-weight: 600;
+  color: var(--muted);
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+  white-space: nowrap;
+}
+
+.coll-vis-select {
+  border: 1px solid var(--line);
+  background: var(--paper-3);
+  color: var(--ink);
+  padding: 4px 8px;
+  font-size: 13px;
+}
+
+.coll-section-heading {
+  font-size: 11px;
+  font-weight: 700;
+  color: var(--muted);
+  text-transform: uppercase;
+  letter-spacing: 0.06em;
+  margin-bottom: 8px;
+}
+
+.coll-entries-section {
+  flex: 1;
+}
+
+.coll-entries-list {
+  list-style: none;
+  margin: 0;
+  padding: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+}
+
+.coll-entry-row {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding: 7px 0;
+  border-bottom: 1px solid var(--line-soft);
+}
+
+.coll-entry-info {
+  flex: 1;
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+}
+
+.coll-entry-title {
+  font-size: 14px;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.coll-entry-kind {
+  font-size: 11px;
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+}
+
+.coll-entry-actions {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  flex-shrink: 0;
+}
+
+.coll-entry-vis-select {
+  border: 1px solid var(--line);
+  background: var(--paper-3);
+  color: var(--ink);
+  padding: 3px 6px;
+  font-size: 12px;
+}
+
+.coll-entry-remove {
+  border: none;
+  background: none;
+  cursor: pointer;
+  color: var(--muted);
+  font-size: 18px;
+  line-height: 1;
+  padding: 0 4px;
+}
+
+.coll-entry-remove:hover {
+  color: var(--accent);
+}
+
+.coll-add-entry-form {
+  border-top: 1px solid var(--line-soft);
+  padding-top: 12px;
+}
+
+.coll-add-entry-row {
+  display: flex;
+  gap: 8px;
+  align-items: center;
+}
+
+.coll-add-entry-input {
+  flex: 1;
+  border: 1px solid var(--line);
+  background: var(--paper-3);
+  color: var(--ink);
+  padding: 6px 10px;
+  font-size: 13px;
+  min-width: 0;
+}
+
+.coll-add-btn {
+  border: none;
+  background: var(--ink);
+  color: var(--paper);
+  padding: 6px 14px;
+  font-size: 13px;
+  font-weight: 600;
+  cursor: pointer;
+  white-space: nowrap;
+}
+
+.coll-add-btn:hover {
+  opacity: 0.85;
+}
+
+.coll-add-btn:disabled {
+  opacity: 0.45;
+  cursor: default;
+}
+
+.coll-create-details summary {
+  font-weight: 600;
+  cursor: pointer;
+}