diff --git a/frontend/src/components/Leaderboard.tsx b/frontend/src/components/Leaderboard.tsx
new file mode 100644
index 0000000..c8c8fab
--- /dev/null
+++ b/frontend/src/components/Leaderboard.tsx
@@ -0,0 +1,78 @@
+import { useState, useEffect } from 'react'
+import { useTranslation } from 'react-i18next'
+import { IconTrophyFilled, IconClockFilled, IconBulbFilled, IconAwardFilled, IconRosetteDiscountCheckFilled } from '@tabler/icons-react'
+import { motion } from 'motion/react'
+import * as api from '../api'
+import type { LeaderboardEntry } from '../api'
+import { useStore } from '../store'
+
+type Entry = LeaderboardEntry
+
+function formatTime(secs: number) {
+  const m = Math.floor(secs / 60)
+  const s = secs % 60
+  return m > 0 ? `${m}:${s.toString().padStart(2, '0')}` : `${s}s`
+}
+
+function RankIcon({ rank }: { rank: number }) {
+  if (rank === 1) return <span aria-label="1st place"><IconTrophyFilled size={13} style={{ color: '#fbbf24' }} /></span>
+  if (rank === 2) return <span aria-label="2nd place"><IconAwardFilled size={13} style={{ color: '#94a3b8' }} /></span>
+  if (rank === 3) return <span aria-label="3rd place"><IconRosetteDiscountCheckFilled size={13} style={{ color: '#d97706' }} /></span>
+  return <span>{rank}.</span>
+}
+
+export default function Leaderboard() {
+  const { t } = useTranslation()
+  const puzzleId = useStore(s => s.puzzleId)
+  const elapsed = useStore(s => s.elapsed)
+  const hintsUsed = useStore(s => s.hintsUsed)
+  const [entries, setEntries] = useState<Entry[]>([])
+  const [loading, setLoading] = useState(true)
+
+  useEffect(() => {
+    if (!puzzleId) return
+    const t0 = setTimeout(() => setLoading(true), 0)
+    api.fetchLeaderboard(puzzleId).then(data => {
+      setEntries(data.entries || [])
+      setLoading(false)
+    }).catch(() => setLoading(false))
+    return () => clearTimeout(t0)
+  }, [puzzleId])
+
+  if (loading || entries.length === 0) return null
+
+  const userRank = entries.findIndex(e => e.time > elapsed) + 1 || entries.length + 1
+
+  return (
+    <motion.div
+      className="leaderboard"
+      initial={{ opacity: 0, y: -8 }}
+      animate={{ opacity: 1, y: 0 }}
+      transition={{ duration: 0.3, delay: 0.5 }}
+    >
+      <div className="leaderboard-header">
+        <IconTrophyFilled size={12} aria-hidden="true" />
+        <span>{t('leaderboard.title')}</span>
+      </div>
+      <div className="leaderboard-list">
+        {entries.slice(0, 10).map((entry, i) => (
+          <div key={i} className={`leaderboard-row ${i < 3 ? 'leaderboard-top' : ''}`}>
+            <span className="leaderboard-rank"><RankIcon rank={i + 1} /></span>
+            <span className="leaderboard-name">{entry.name || t('common.anonymous')}</span>
+            <span className="leaderboard-time">
+              <IconClockFilled size={10} aria-hidden="true" /> {formatTime(entry.time)}
+            </span>
+            {entry.hints > 0 && (
+              <span className="leaderboard-hints">
+                <IconBulbFilled size={9} aria-hidden="true" /> {entry.hints}
+              </span>
+            )}
+          </div>
+        ))}
+      </div>
+      <div className="leaderboard-you">
+        {t('leaderboard.yourTime', { time: formatTime(elapsed), detail: (hintsUsed > 0 ? (hintsUsed === 1 ? t('leaderboard.hintCount', { count: hintsUsed }) : t('leaderboard.hintCount_plural', { count: hintsUsed })) + ', ' : '') + '#' + userRank })}
+      </div>
+    </motion.div>
+  )
+}