diff --git a/spa/src/components/review-card.tsx b/spa/src/components/review-card.tsx
index d795fbd..83ee277 100644
--- a/spa/src/components/review-card.tsx
+++ b/spa/src/components/review-card.tsx
@@ -17,9 +17,10 @@ type ReviewCardProps = {
   isFederated?: boolean
   actorUrl?: string
   onEdit?: () => void
+  onShowDetail?: () => void
 }
 
-export function ReviewCard({ movie, review, userName, userId, isFederated, actorUrl, onEdit }: ReviewCardProps) {
+export function ReviewCard({ movie, review, userName, userId, isFederated, actorUrl, onEdit, onShowDetail }: ReviewCardProps) {
   const card = (
     <Card size="sm">
       <CardContent className="flex gap-3">
@@ -59,7 +60,17 @@ export function ReviewCard({ movie, review, userName, userId, isFederated, actor
             <StarDisplay rating={review.rating} />
             {review.watch_medium && <WatchMediumBadge medium={review.watch_medium} />}
           </div>
-          {review.comment && <p className="mt-1 line-clamp-2 text-xs text-muted-foreground">{review.comment}</p>}
+          {review.comment && (
+            <p
+              className="mt-1 line-clamp-2 text-xs text-muted-foreground"
+              role={onShowDetail ? "button" : undefined}
+              tabIndex={onShowDetail ? 0 : undefined}
+              onClick={onShowDetail}
+              onKeyDown={onShowDetail ? (e) => e.key === "Enter" && onShowDetail() : undefined}
+            >
+              {review.comment}
+            </p>
+          )}
         </div>
       </CardContent>
     </Card>
diff --git a/spa/src/components/review-detail-sheet.tsx b/spa/src/components/review-detail-sheet.tsx
new file mode 100644
index 0000000..3b3388c
--- /dev/null
+++ b/spa/src/components/review-detail-sheet.tsx
@@ -0,0 +1,51 @@
+import { VisuallyHidden } from "radix-ui"
+import { Drawer, DrawerContent, DrawerTitle } from "@/components/ui/drawer"
+import { StarDisplay } from "@/components/star-display"
+import { WatchMediumBadge } from "@/components/watch-medium-badge"
+import { shortDate } from "@/lib/date"
+import { posterUrl } from "@/lib/api/client"
+import type { MovieDto, ReviewDto } from "@/lib/api/common"
+
+type ReviewDetailSheetProps = {
+  open: boolean
+  onOpenChange: (open: boolean) => void
+  movie: MovieDto
+  review: ReviewDto
+  userName?: string
+}
+
+export function ReviewDetailSheet({ open, onOpenChange, movie, review, userName }: ReviewDetailSheetProps) {
+  return (
+    <Drawer open={open} onOpenChange={onOpenChange}>
+      <DrawerContent className="mx-auto max-w-lg">
+        <VisuallyHidden.Root><DrawerTitle>{movie.title}</DrawerTitle></VisuallyHidden.Root>
+        <div className="p-5 pb-8">
+          <div className="mb-4 flex gap-3">
+            <div className="h-24 w-16 flex-shrink-0 overflow-hidden rounded-lg bg-muted">
+              {movie.poster_path && <img src={posterUrl(movie.poster_path)} alt="" className="size-full object-cover" />}
+            </div>
+            <div>
+              <p className="text-lg font-bold">{movie.title}</p>
+              <p className="text-sm text-muted-foreground">
+                {movie.release_year}{movie.director && ` · ${movie.director}`}
+              </p>
+              {userName && <p className="mt-1 text-xs text-muted-foreground">{userName}</p>}
+            </div>
+          </div>
+
+          <div className="mb-4 flex items-center gap-2">
+            <StarDisplay rating={review.rating} />
+            {review.watch_medium && <WatchMediumBadge medium={review.watch_medium} />}
+            <span className="text-xs text-muted-foreground">{shortDate(review.watched_at)}</span>
+          </div>
+
+          {review.comment && (
+            <p className="select-text whitespace-pre-wrap text-sm leading-relaxed">
+              {review.comment}
+            </p>
+          )}
+        </div>
+      </DrawerContent>
+    </Drawer>
+  )
+}
diff --git a/spa/src/components/review-form-fields.tsx b/spa/src/components/review-form-fields.tsx
index 6c62246..0d6f846 100644
--- a/spa/src/components/review-form-fields.tsx
+++ b/spa/src/components/review-form-fields.tsx
@@ -1,3 +1,4 @@
+import { useCallback, useRef } from "react"
 import { useTranslation } from "react-i18next"
 import { CalendarIcon } from "lucide-react"
 import { format } from "date-fns"
@@ -38,7 +39,7 @@ export function ReviewFormFields({
         <div className="flex justify-center"><StarRating value={rating} onChange={onRatingChange} /></div>
       </div>
 
-      <Textarea value={comment} onChange={(e) => onCommentChange(e.target.value)} placeholder={t("logReview.commentPlaceholder")} className="mb-5" rows={3} />
+      <AutoGrowTextarea value={comment} onChange={onCommentChange} placeholder={t("logReview.commentPlaceholder")} className="mb-5" />
 
       <div className="mb-5">
         <p className="mb-2 text-xs uppercase tracking-wide text-muted-foreground">{t("logReview.watchedAt")}</p>
@@ -68,3 +69,38 @@ export function ReviewFormFields({
     </>
   )
 }
+
+function AutoGrowTextarea({
+  value,
+  onChange,
+  placeholder,
+  className,
+}: {
+  value: string
+  onChange: (v: string) => void
+  placeholder?: string
+  className?: string
+}) {
+  const ref = useRef<HTMLTextAreaElement>(null)
+  const handleInput = useCallback(() => {
+    const el = ref.current
+    if (!el) return
+    el.style.height = "auto"
+    el.style.height = `${el.scrollHeight}px`
+  }, [])
+
+  return (
+    <Textarea
+      ref={ref}
+      value={value}
+      onChange={(e) => {
+        onChange(e.target.value)
+        handleInput()
+      }}
+      placeholder={placeholder}
+      className={className}
+      rows={2}
+      style={{ overflow: "hidden", resize: "none" }}
+    />
+  )
+}
diff --git a/spa/src/routes/_app/index.tsx b/spa/src/routes/_app/index.tsx
index 8209c07..1520e34 100644
--- a/spa/src/routes/_app/index.tsx
+++ b/spa/src/routes/_app/index.tsx
@@ -16,6 +16,7 @@ import { StarRating } from "@/components/star-rating"
 import { useAuth } from "@/components/auth-provider"
 import { useQueryClient } from "@tanstack/react-query"
 import { EditReviewSheet } from "@/components/edit-review-sheet"
+import { ReviewDetailSheet } from "@/components/review-detail-sheet"
 import { useInfiniteActivityFeed, useDeleteReview } from "@/hooks/use-diary"
 import type { FeedEntryDto } from "@/lib/api/diary"
 import { SearchOverlay } from "@/components/search-overlay"
@@ -69,6 +70,7 @@ function FeedTab() {
     useInfiniteActivityFeed({ sort_by: sortBy })
   const deleteReview = useDeleteReview()
   const [editingEntry, setEditingEntry] = useState<FeedEntryDto | null>(null)
+  const [detailEntry, setDetailEntry] = useState<FeedEntryDto | null>(null)
   const items = data?.pages.flatMap((p) => p.items) ?? []
   const loadMore = useCallback(() => fetchNextPage(), [fetchNextPage])
 
@@ -123,6 +125,7 @@ function FeedTab() {
                 isFederated={entry.is_federated}
                 actorUrl={entry.actor_url}
                 onEdit={isOwn ? () => setEditingEntry(entry) : undefined}
+                onShowDetail={entry.review.comment ? () => setDetailEntry(entry) : undefined}
               />
             )
             return isOwn ? (
@@ -149,6 +152,16 @@ function FeedTab() {
           review={editingEntry.review}
         />
       )}
+
+      {detailEntry && (
+        <ReviewDetailSheet
+          open={!!detailEntry}
+          onOpenChange={(open) => !open && setDetailEntry(null)}
+          movie={detailEntry.movie}
+          review={detailEntry.review}
+          userName={detailEntry.user_display_name}
+        />
+      )}
     </div>
   )
 }