diff --git a/packages/web/src/app/(admin)/admin/curation/items/page.tsx b/packages/web/src/app/(admin)/admin/curation/items/page.tsx
index 08d2516..d536a64 100644
--- a/packages/web/src/app/(admin)/admin/curation/items/page.tsx
+++ b/packages/web/src/app/(admin)/admin/curation/items/page.tsx
@@ -13,6 +13,16 @@ import {
 import { Card, CardContent } from '@/components/ui/card';
 import { Badge } from '@/components/ui/badge';
 import { Button } from '@/components/ui/button';
+import {
+  AlertDialog,
+  AlertDialogAction,
+  AlertDialogCancel,
+  AlertDialogContent,
+  AlertDialogDescription,
+  AlertDialogFooter,
+  AlertDialogHeader,
+  AlertDialogTitle,
+} from '@/components/ui/alert-dialog';
 
 interface CurationItem {
   id: string;
@@ -58,6 +68,9 @@ export default function CurationItemsPage() {
   const [loading, setLoading] = useState(true);
   const [deletingId, setDeletingId] = useState<string | null>(null);
 
+  // Delete confirmation state
+  const [deleteTarget, setDeleteTarget] = useState<CurationItem | null>(null);
+
   // Filters
   const [category, setCategory] = useState('all');
   const [sourceId, setSourceId] = useState('all');
@@ -101,21 +114,25 @@ export default function CurationItemsPage() {
   };
 
   const handleDelete = async (item: CurationItem) => {
-    if (!confirm(`"${item.title}" 아이템을 삭제하시겠습니까?`)) return;
+    setDeleteTarget(item);
+  };
+
+  const confirmDelete = async () => {
+    if (!deleteTarget) return;
 
     try {
-      setDeletingId(item.id);
-      const response = await fetch(`/api/admin/curation/items/${item.id}`, {
+      setDeletingId(deleteTarget.id);
+      const response = await fetch(`/api/admin/curation/items/${deleteTarget.id}`, {
         method: 'DELETE',
       });
 
       if (!response.ok) throw new Error('Failed to delete item');
 
+      setDeleteTarget(null);
       // Refresh current page
       fetchItems(pagination.page, category, sourceId);
     } catch (err) {
       console.error('Error deleting item:', err);
-      alert('삭제에 실패했습니다.');
     } finally {
       setDeletingId(null);
     }
@@ -206,7 +223,10 @@ export default function CurationItemsPage() {
                   className="font-medium text-sm hover:underline line-clamp-2 flex items-start gap-1 group"
                 >
                   <span className="flex-1">{item.title}</span>
-                  <ExternalLink className="h-3.5 w-3.5 mt-0.5 shrink-0 opacity-0 group-hover:opacity-100 transition-opacity" />
+                  <span className="opacity-0 group-hover:opacity-100 transition-opacity flex items-center gap-0.5 mt-0.5 shrink-0">
+                    <ExternalLink className="h-3.5 w-3.5" aria-hidden="true" />
+                    <span className="sr-only">(새 탭에서 열기)</span>
+                  </span>
                 </a>
 
                 {/* Source + Date */}
@@ -280,6 +300,22 @@ export default function CurationItemsPage() {
           </Button>
         </div>
       )}
+
+      {/* Delete Confirmation Dialog */}
+      <AlertDialog open={!!deleteTarget} onOpenChange={(open) => !open && setDeleteTarget(null)}>
+        <AlertDialogContent>
+          <AlertDialogHeader>
+            <AlertDialogTitle>아이템 삭제</AlertDialogTitle>
+            <AlertDialogDescription>
+              &ldquo;{deleteTarget?.title}&rdquo; 아이템을 삭제하시겠습니까? 이 작업은 되돌릴 수 없습니다.
+            </AlertDialogDescription>
+          </AlertDialogHeader>
+          <AlertDialogFooter>
+            <AlertDialogCancel>취소</AlertDialogCancel>
+            <AlertDialogAction onClick={confirmDelete}>삭제</AlertDialogAction>
+          </AlertDialogFooter>
+        </AlertDialogContent>
+      </AlertDialog>
     </div>
   );
 }
diff --git a/packages/web/src/app/(admin)/admin/curation/page.tsx b/packages/web/src/app/(admin)/admin/curation/page.tsx
index b6baaaa..bb736e8 100644
--- a/packages/web/src/app/(admin)/admin/curation/page.tsx
+++ b/packages/web/src/app/(admin)/admin/curation/page.tsx
@@ -12,6 +12,17 @@ import {
 } from '@/components/ui/card';
 import { Button } from '@/components/ui/button';
 import { Input } from '@/components/ui/input';
+import { Label } from '@/components/ui/label';
+import {
+  AlertDialog,
+  AlertDialogAction,
+  AlertDialogCancel,
+  AlertDialogContent,
+  AlertDialogDescription,
+  AlertDialogFooter,
+  AlertDialogHeader,
+  AlertDialogTitle,
+} from '@/components/ui/alert-dialog';
 import { AdminDashboardSkeleton, PageError } from '@/components/ui/page-state';
 import { CrawlModal } from './crawl-modal';
 import type { CrawlStatus, CrawlSourceResult, CrawlSummary } from './crawl-modal';
@@ -60,6 +71,9 @@ export default function AdminCurationPage() {
   const [editError, setEditError] = useState<string | null>(null);
   const [saving, setSaving] = useState(false);
 
+  // Delete confirmation state
+  const [deleteTarget, setDeleteTarget] = useState<CurationSource | null>(null);
+
   // Crawl modal state
   const [crawlModalOpen, setCrawlModalOpen] = useState(false);
   const [crawlStatus, setCrawlStatus] = useState<CrawlStatus>('idle');
@@ -185,17 +199,15 @@ export default function AdminCurationPage() {
   };
 
   const handleDelete = async (source: CurationSource) => {
-    if (
-      !confirm(
-        `"${source.name}" 소스를 삭제하시겠습니까?\n수집된 ${source.itemCount}개의 아이템도 함께 삭제됩니다.`,
-      )
-    ) {
-      return;
-    }
+    setDeleteTarget(source);
+  };
+
+  const confirmDelete = async () => {
+    if (!deleteTarget) return;
 
     try {
-      setUpdatingId(source.id);
-      const response = await fetch(`/api/admin/curation/${source.id}`, {
+      setUpdatingId(deleteTarget.id);
+      const response = await fetch(`/api/admin/curation/${deleteTarget.id}`, {
         method: 'DELETE',
       });
 
@@ -203,6 +215,7 @@ export default function AdminCurationPage() {
         throw new Error('Failed to delete source');
       }
 
+      setDeleteTarget(null);
       await fetchSources();
     } catch (err) {
       console.error('Error deleting source:', err);
@@ -361,6 +374,23 @@ export default function AdminCurationPage() {
         errorMessage={crawlErrorMessage}
       />
 
+      {/* Delete Confirmation Dialog */}
+      <AlertDialog open={!!deleteTarget} onOpenChange={(open) => !open && setDeleteTarget(null)}>
+        <AlertDialogContent>
+          <AlertDialogHeader>
+            <AlertDialogTitle>소스 삭제</AlertDialogTitle>
+            <AlertDialogDescription>
+              &ldquo;{deleteTarget?.name}&rdquo; 소스를 삭제하시겠습니까? 수집된 {deleteTarget?.itemCount}개의
+              아이템도 함께 삭제됩니다. 이 작업은 되돌릴 수 없습니다.
+            </AlertDialogDescription>
+          </AlertDialogHeader>
+          <AlertDialogFooter>
+            <AlertDialogCancel>취소</AlertDialogCancel>
+            <AlertDialogAction onClick={confirmDelete}>삭제</AlertDialogAction>
+          </AlertDialogFooter>
+        </AlertDialogContent>
+      </AlertDialog>
+
       {/* Stats Cards */}
       <div className="grid grid-cols-2 gap-3 md:grid-cols-4 md:gap-4">
         <Card>
@@ -443,8 +473,12 @@ export default function AdminCurationPage() {
               <CardDescription>{filteredSources.length}개의 소스</CardDescription>
             </div>
             <div className="relative">
-              <Search className="absolute left-2.5 top-2.5 h-4 w-4 text-muted-foreground" />
+              <Search className="absolute left-2.5 top-2.5 h-4 w-4 text-muted-foreground" aria-hidden="true" />
+              <Label htmlFor="curation-search" className="sr-only">
+                소스 검색
+              </Label>
               <Input
+                id="curation-search"
                 placeholder="검색..."
                 className="pl-8 w-full sm:w-[200px]"
                 value={searchQuery}
diff --git a/packages/web/src/app/(admin)/admin/fines/page.tsx b/packages/web/src/app/(admin)/admin/fines/page.tsx
index 4d13f16..27aa3d0 100644
--- a/packages/web/src/app/(admin)/admin/fines/page.tsx
+++ b/packages/web/src/app/(admin)/admin/fines/page.tsx
@@ -7,6 +7,7 @@ import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/com
 import { Badge } from '@/components/ui/badge';
 import { Button } from '@/components/ui/button';
 import { Input } from '@/components/ui/input';
+import { Label } from '@/components/ui/label';
 import {
   AlertDialog,
   AlertDialogAction,
@@ -301,8 +302,12 @@ export default function AdminFinesPage() {
             </div>
             <div className="flex items-center gap-2">
               <div className="relative w-full sm:w-auto">
-                <Search className="absolute left-2.5 top-2.5 h-4 w-4 text-muted-foreground" />
+                <Search className="absolute left-2.5 top-2.5 h-4 w-4 text-muted-foreground" aria-hidden="true" />
+                <Label htmlFor="fines-search" className="sr-only">
+                  벌금 검색
+                </Label>
                 <Input
+                  id="fines-search"
                   placeholder="검색..."
                   className="pl-8 w-full sm:w-[200px]"
                   value={searchQuery}
diff --git a/packages/web/src/app/(admin)/admin/members/member-form-dialog.tsx b/packages/web/src/app/(admin)/admin/members/member-form-dialog.tsx
index 289273b..5882226 100644
--- a/packages/web/src/app/(admin)/admin/members/member-form-dialog.tsx
+++ b/packages/web/src/app/(admin)/admin/members/member-form-dialog.tsx
@@ -184,7 +184,12 @@ export function MemberFormDialog({
         <form onSubmit={handleSubmit} className="space-y-4">
           {/* Error messages */}
           {errors.length > 0 && (
-            <div className="rounded-md bg-destructive/10 p-3 text-sm text-destructive">
+            <div
+              role="alert"
+              aria-live="assertive"
+              id="form-errors"
+              className="rounded-md bg-destructive/10 p-3 text-sm text-destructive"
+            >
               {errors.map((error, index) => (
                 <p key={index}>{error}</p>
               ))}
@@ -202,6 +207,8 @@ export function MemberFormDialog({
               value={formData.name}
               onChange={handleChange}
               placeholder="홍길동"
+              aria-invalid={errors.some((e) => e.includes('이름'))}
+              aria-describedby={errors.length > 0 ? 'form-errors' : undefined}
             />
           </div>
 
@@ -216,6 +223,8 @@ export function MemberFormDialog({
               value={formData.part}
               onChange={handleChange}
               placeholder="frontend, backend, design, pm 등"
+              aria-invalid={errors.some((e) => e.includes('파트'))}
+              aria-describedby={errors.length > 0 ? 'form-errors' : undefined}
             />
           </div>
 
@@ -230,6 +239,8 @@ export function MemberFormDialog({
               value={formData.discordId}
               onChange={handleChange}
               placeholder="123456789012345678"
+              aria-invalid={errors.some((e) => e.includes('Discord ID'))}
+              aria-describedby={errors.length > 0 ? 'form-errors' : undefined}
             />
           </div>
 
@@ -242,6 +253,7 @@ export function MemberFormDialog({
               value={formData.discordUsername}
               onChange={handleChange}
               placeholder="username#1234"
+              aria-describedby={errors.length > 0 ? 'form-errors' : undefined}
             />
           </div>
 
@@ -256,6 +268,8 @@ export function MemberFormDialog({
               value={formData.blogUrl}
               onChange={handleChange}
               placeholder="https://velog.io/@username"
+              aria-invalid={errors.some((e) => e.includes('블로그 URL'))}
+              aria-describedby={errors.length > 0 ? 'form-errors' : undefined}
             />
           </div>
 
diff --git a/packages/web/src/app/(admin)/admin/members/page.tsx b/packages/web/src/app/(admin)/admin/members/page.tsx
index 791da9c..d1612a7 100644
--- a/packages/web/src/app/(admin)/admin/members/page.tsx
+++ b/packages/web/src/app/(admin)/admin/members/page.tsx
@@ -18,6 +18,7 @@ import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/com
 import { Badge } from '@/components/ui/badge';
 import { Button } from '@/components/ui/button';
 import { Input } from '@/components/ui/input';
+import { Label } from '@/components/ui/label';
 import {
   Table,
   TableBody,
@@ -257,8 +258,12 @@ export default function AdminMembersPage() {
             </div>
             <div className="flex items-center gap-2">
               <div className="relative w-full sm:w-auto">
-                <Search className="absolute left-2.5 top-2.5 h-4 w-4 text-muted-foreground" />
+                <Search className="absolute left-2.5 top-2.5 h-4 w-4 text-muted-foreground" aria-hidden="true" />
+                <Label htmlFor="members-search" className="sr-only">
+                  멤버 검색
+                </Label>
                 <Input
+                  id="members-search"
                   placeholder="검색..."
                   className="pl-8 w-full sm:w-[200px]"
                   value={searchQuery}
diff --git a/packages/web/src/app/(user)/board/write/page.tsx b/packages/web/src/app/(user)/board/write/page.tsx
index 678e74f..fec9df7 100644
--- a/packages/web/src/app/(user)/board/write/page.tsx
+++ b/packages/web/src/app/(user)/board/write/page.tsx
@@ -227,7 +227,12 @@ export default function BoardWritePage() {
 
       {/* Error Message */}
       {error && (
-        <p className="text-sm text-destructive text-center rounded-md bg-destructive/10 px-4 py-2.5 border border-destructive/20">
+        <p
+          role="alert"
+          aria-live="assertive"
+          id="form-error"
+          className="text-sm text-destructive text-center rounded-md bg-destructive/10 px-4 py-2.5 border border-destructive/20"
+        >
           {error}
         </p>
       )}
diff --git a/packages/web/src/app/(user)/posts/page.tsx b/packages/web/src/app/(user)/posts/page.tsx
index 648deb9..4bcd871 100644
--- a/packages/web/src/app/(user)/posts/page.tsx
+++ b/packages/web/src/app/(user)/posts/page.tsx
@@ -261,7 +261,10 @@ function PostsContent() {
                       <span>{new Date(post.publishedAt).toLocaleDateString('ko-KR')}</span>
                     </div>
                   </div>
-                  <ExternalLink className="h-4 w-4 text-muted-foreground/40 group-hover:text-primary shrink-0 mt-0.5 transition-colors" />
+                  <span className="flex items-center gap-0.5 text-muted-foreground/40 group-hover:text-primary shrink-0 mt-0.5 transition-colors">
+                    <ExternalLink className="h-4 w-4" aria-hidden="true" />
+                    <span className="sr-only">(새 탭에서 열기)</span>
+                  </span>
                 </a>
               ))}
             </div>
@@ -299,10 +302,12 @@ function PostsContent() {
                           href={post.url}
                           target="_blank"
                           rel="noopener noreferrer"
-                          className="text-sm text-primary hover:underline underline-offset-4 line-clamp-1 font-medium"
+                          className="text-sm text-primary hover:underline underline-offset-4 line-clamp-1 font-medium inline-flex items-center gap-1"
                           onClick={() => trackPostView(post.id)}
                         >
                           {post.title}
+                          <ExternalLink className="h-3 w-3" aria-hidden="true" />
+                          <span className="sr-only">(새 탭에서 열기)</span>
                         </a>
                       </TableCell>
                       <TableCell className="text-sm text-foreground/80 py-2.5 whitespace-nowrap">
@@ -333,6 +338,7 @@ function PostsContent() {
                           size="sm"
                           asChild
                           className="h-7 w-7 p-0 text-muted-foreground hover:text-foreground"
+                          aria-label={`${post.title} (새 탭에서 열기)`}
                         >
                           <a
                             href={post.url}
diff --git a/packages/web/src/components/landing/landing-client.tsx b/packages/web/src/components/landing/landing-client.tsx
index 9bf385c..2fdb47e 100644
--- a/packages/web/src/components/landing/landing-client.tsx
+++ b/packages/web/src/components/landing/landing-client.tsx
@@ -13,6 +13,7 @@ import {
   Trophy,
 } from 'lucide-react';
 import { CountUp, DrawLine, FadeUp, StaggerContainer, StaggerItem } from './motion';
+import { ExternalLinkIcon } from '@/components/ui/external-link';
 
 // ---------------------------------------------------------------------------
 // Types
@@ -354,18 +355,20 @@ function Footer() {
             href="https://github.com/bbbang105"
             target="_blank"
             rel="noopener noreferrer"
-            className="text-zinc-500 hover:text-white transition-colors"
+            className="text-zinc-500 hover:text-white transition-colors inline-flex items-center gap-1"
           >
             @bbbang105
+            <ExternalLinkIcon />
           </a>
           {' & '}
           <a
             href="https://github.com/choihooo"
             target="_blank"
             rel="noopener noreferrer"
-            className="text-zinc-500 hover:text-white transition-colors"
+            className="text-zinc-500 hover:text-white transition-colors inline-flex items-center gap-1"
           >
             @choihooo
+            <ExternalLinkIcon />
           </a>
         </p>
       </div>
diff --git a/packages/web/src/components/layout/bottom-nav.tsx b/packages/web/src/components/layout/bottom-nav.tsx
index 38326cc..b9994f3 100644
--- a/packages/web/src/components/layout/bottom-nav.tsx
+++ b/packages/web/src/components/layout/bottom-nav.tsx
@@ -61,6 +61,7 @@ export function BottomNav({ isAdmin = false }: BottomNavProps) {
             <Link
               key={item.href}
               href={item.href}
+              aria-current={isActive ? 'page' : undefined}
               className={cn(
                 'flex flex-1 flex-col items-center justify-center gap-0.5 py-1 text-[10px] font-medium transition-colors',
                 isActive ? 'text-primary' : 'text-muted-foreground active:text-foreground'
diff --git a/packages/web/src/components/ui/external-link.tsx b/packages/web/src/components/ui/external-link.tsx
new file mode 100644
index 0000000..443f6da
--- /dev/null
+++ b/packages/web/src/components/ui/external-link.tsx
@@ -0,0 +1,20 @@
+import { ExternalLink } from 'lucide-react';
+import { cn } from '@/lib/utils';
+
+interface ExternalLinkIconProps {
+  className?: string;
+  label?: string;
+}
+
+/**
+ * External link icon with screen reader text for accessibility.
+ * Defaults to "(새 탭에서 열기)" which means "(opens in new tab)" in Korean.
+ */
+export function ExternalLinkIcon({ className, label = '(새 탭에서 열기)' }: ExternalLinkIconProps) {
+  return (
+    <>
+      <ExternalLink className={cn('h-3 w-3', className)} aria-hidden="true" />
+      <span className="sr-only">{label}</span>
+    </>
+  );
+}
diff --git a/packages/web/src/components/ui/index.ts b/packages/web/src/components/ui/index.ts
index 76d3677..d61fb37 100644
--- a/packages/web/src/components/ui/index.ts
+++ b/packages/web/src/components/ui/index.ts
@@ -6,3 +6,4 @@ export { Table, TableHeader, TableBody, TableFooter, TableHead, TableRow, TableC
 export { Separator } from './separator';
 export { Avatar, AvatarImage, AvatarFallback } from './avatar';
 export { Badge, badgeVariants } from './badge';
+export { ExternalLinkIcon } from './external-link';
diff --git a/packages/web/src/components/ui/table.tsx b/packages/web/src/components/ui/table.tsx
index 4f14b5f..fa8148f 100644
--- a/packages/web/src/components/ui/table.tsx
+++ b/packages/web/src/components/ui/table.tsx
@@ -69,9 +69,10 @@ TableRow.displayName = 'TableRow';
 const TableHead = React.forwardRef<
   HTMLTableCellElement,
   React.ThHTMLAttributes<HTMLTableCellElement>
->(({ className, ...props }, ref) => (
+>(({ className, scope = 'col', ...props }, ref) => (
   <th
     ref={ref}
+    scope={scope}
     className={cn(
       'h-12 px-4 text-left align-middle font-medium text-muted-foreground [&:has([role=checkbox])]:pr-0',
       className