diff --git a/web/src/components/ResumeSyncConfirmModal.vue b/web/src/components/ResumeSyncConfirmModal.vue
new file mode 100644
index 0000000..3739b77
--- /dev/null
+++ b/web/src/components/ResumeSyncConfirmModal.vue
@@ -0,0 +1,146 @@
+<template>
+  <Teleport to="body">
+    <div v-if="show" class="sync-modal__overlay" role="dialog" aria-modal="true"
+         aria-labelledby="sync-modal-title" @keydown.esc="$emit('cancel')">
+      <div class="sync-modal">
+        <h2 id="sync-modal-title" class="sync-modal__title">Replace profile content?</h2>
+
+        <div class="sync-modal__comparison">
+          <div class="sync-modal__col sync-modal__col--before">
+            <div class="sync-modal__col-label">Current profile</div>
+            <div class="sync-modal__col-name">{{ currentSummary.name || '(no name)' }}</div>
+            <div class="sync-modal__col-summary">{{ currentSummary.careerSummary || '(no summary)' }}</div>
+            <div class="sync-modal__col-role">{{ currentSummary.latestRole || '(no experience)' }}</div>
+          </div>
+          <div class="sync-modal__arrow" aria-hidden="true">→</div>
+          <div class="sync-modal__col sync-modal__col--after">
+            <div class="sync-modal__col-label">Replacing with</div>
+            <div class="sync-modal__col-name">{{ sourceSummary.name || '(no name)' }}</div>
+            <div class="sync-modal__col-summary">{{ sourceSummary.careerSummary || '(no summary)' }}</div>
+            <div class="sync-modal__col-role">{{ sourceSummary.latestRole || '(no experience)' }}</div>
+          </div>
+        </div>
+
+        <div v-if="blankFields.length" class="sync-modal__blank-warning">
+          <strong>Fields that will be blank after import:</strong>
+          <ul>
+            <li v-for="f in blankFields" :key="f">{{ f }}</li>
+          </ul>
+          <p class="sync-modal__blank-note">You can fill these in after importing.</p>
+        </div>
+
+        <p class="sync-modal__preserve-note">
+          Your salary, work preferences, and contact details are not affected.
+        </p>
+
+        <div class="sync-modal__actions">
+          <button class="btn-secondary" @click="$emit('cancel')">Keep current profile</button>
+          <button class="btn-danger" @click="$emit('confirm')">Replace profile content</button>
+        </div>
+      </div>
+    </div>
+  </Teleport>
+</template>
+
+<script setup lang="ts">
+interface ContentSummary {
+  name: string
+  careerSummary: string
+  latestRole: string
+}
+
+defineProps<{
+  show: boolean
+  currentSummary: ContentSummary
+  sourceSummary: ContentSummary
+  blankFields: string[]
+}>()
+
+defineEmits<{
+  confirm: []
+  cancel: []
+}>()
+</script>
+
+<style scoped>
+.sync-modal__overlay {
+  position: fixed; inset: 0; z-index: 1000;
+  background: rgba(0,0,0,0.5);
+  display: flex; align-items: center; justify-content: center;
+  padding: var(--space-4);
+}
+.sync-modal {
+  background: var(--color-surface-raised);
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-lg, 0.75rem);
+  padding: var(--space-6);
+  max-width: 600px; width: 100%;
+  max-height: 90vh; overflow-y: auto;
+}
+.sync-modal__title {
+  font-size: 1.15rem; font-weight: 700;
+  margin-bottom: var(--space-5);
+  color: var(--color-text);
+}
+.sync-modal__comparison {
+  display: grid; grid-template-columns: 1fr auto 1fr; gap: var(--space-3);
+  align-items: start; margin-bottom: var(--space-5);
+}
+.sync-modal__arrow {
+  font-size: 1.5rem; color: var(--color-text-muted);
+  padding-top: var(--space-5);
+}
+.sync-modal__col {
+  background: var(--color-surface-alt);
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-md);
+  padding: var(--space-3);
+}
+.sync-modal__col--after { border-color: var(--color-primary); }
+.sync-modal__col-label {
+  font-size: 0.75rem; font-weight: 600; color: var(--color-text-muted);
+  text-transform: uppercase; letter-spacing: 0.05em;
+  margin-bottom: var(--space-2);
+}
+.sync-modal__col-name { font-weight: 600; color: var(--color-text); margin-bottom: var(--space-1); }
+.sync-modal__col-summary {
+  font-size: 0.82rem; color: var(--color-text-muted);
+  overflow: hidden; display: -webkit-box;
+  -webkit-line-clamp: 2; -webkit-box-orient: vertical;
+  margin-bottom: var(--space-1);
+}
+.sync-modal__col-role { font-size: 0.82rem; color: var(--color-text-muted); font-style: italic; }
+.sync-modal__blank-warning {
+  background: color-mix(in srgb, var(--color-warning, #d97706) 10%, var(--color-surface-alt));
+  border: 1px solid color-mix(in srgb, var(--color-warning, #d97706) 30%, var(--color-border));
+  border-radius: var(--radius-md); padding: var(--space-3);
+  margin-bottom: var(--space-4);
+  font-size: 0.85rem;
+}
+.sync-modal__blank-warning ul { margin: var(--space-2) 0 0 var(--space-4); }
+.sync-modal__blank-note { margin-top: var(--space-2); color: var(--color-text-muted); }
+.sync-modal__preserve-note {
+  font-size: 0.82rem; color: var(--color-text-muted);
+  margin-bottom: var(--space-5);
+}
+.sync-modal__actions {
+  display: flex; gap: var(--space-3); justify-content: flex-end; flex-wrap: wrap;
+}
+.btn-danger {
+  padding: var(--space-2) var(--space-4);
+  background: var(--color-error, #dc2626);
+  color: #fff; border: none;
+  border-radius: var(--radius-md); cursor: pointer;
+  font-size: var(--font-sm); font-weight: 600;
+}
+.btn-danger:hover { filter: brightness(1.1); }
+.btn-secondary {
+  padding: var(--space-2) var(--space-4);
+  background: transparent;
+  color: var(--color-text);
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-md); cursor: pointer;
+  font-size: var(--font-sm);
+}
+.btn-secondary:hover { background: var(--color-surface-alt); }
+</style>