diff --git a/HANDOFF.md b/HANDOFF.md
index adad8bb..83461fa 100644
--- a/HANDOFF.md
+++ b/HANDOFF.md
@@ -4,7 +4,7 @@
 
 - 프로젝트명: 10 Minute Planner 웹 UI
 - 기술 스택: Vue 3 + Vite + TailwindCSS + JavaScript
-- 현재 기준 버전: `v0.1.28` 준비 중
+- 현재 기준 버전: `v0.1.29` 준비 중
 - Git 원격 저장소: `https://git.sori.studio/zenn/planner.sori.studio.git`
 
 ## 기준 디자인
@@ -170,6 +170,9 @@
 - 집중 보기 오른쪽 패널은 다시 정리해서 `왼쪽 컬럼: CALENDAR / TASK LABELS / D-DAY`, `오른쪽 컬럼: STATS / NEXT DAY`, `하단 전체 폭: READ NEXT / PREV SNAPSHOT` 구조로 맞췄다.
 - 달력은 과하게 키우지 않고 컴팩트한 크기를 유지한 채, 우측 정보 패널 내부 배치만 다시 조정하는 쪽으로 방향을 잡았다.
 - `PRINT 2-UP`은 브라우저/프린터 기본 여백 차이로 오른쪽 페이지가 잘릴 수 있어서, 프레임 폭과 스케일을 조금 더 보수적으로 줄여 안정성을 높였다.
+- 플래너 집중 보기 반응형 기준은 `1620px 이상: 우측 패널 2열`, `1280px 이상 ~ 1619px 이하: 우측 패널 1열 + 최대 360px`, `1280px 미만: 우측 패널 오버레이` 구조로 다시 정리했다.
+- 오버레이 구간에서는 본문 오른쪽 위의 `OPEN SIDE PANEL` 버튼으로 패널을 열고, 배경 클릭이나 `CLOSE` 버튼으로 닫는다.
+- `2 PAGE SPREAD`는 화면 폭을 기준으로 배율을 자동 계산해서 오른쪽 페이지가 잘리는 현상을 줄이는 방향으로 조정했다.
 - 비로그인 랜딩 카드는 상단 고정이 아니라 화면 중앙에 오도록 정렬을 수정했다.
 - 현재 환경에서는 Docker 데몬이 꺼져 있어서 `docker compose build` 실검증은 하지 못했고, 데몬 시작 후 다시 확인이 필요하다.
 - 이미지 저장 기능은 추후 `print-only` 또는 별도 export 전용 레이아웃을 기준으로 구현하면 화면/인쇄/공유 결과를 맞추기 쉽다.
diff --git a/package-lock.json b/package-lock.json
index c6188c2..8cd99d9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "ten-minute-planner",
-  "version": "0.1.28",
+  "version": "0.1.29",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "ten-minute-planner",
-      "version": "0.1.28",
+      "version": "0.1.29",
       "dependencies": {
         "vue": "^3.5.13"
       },
diff --git a/package.json b/package.json
index a485000..8c7805f 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "ten-minute-planner",
   "private": true,
-  "version": "0.1.28",
+  "version": "0.1.29",
   "type": "module",
   "scripts": {
     "dev": "vite",
diff --git a/src/App.vue b/src/App.vue
index 286baa8..d508c82 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1,5 +1,5 @@
 <script setup>
-import { computed, onMounted, reactive, ref, watch, nextTick } from 'vue'
+import { computed, nextTick, onBeforeUnmount, onMounted, reactive, ref, watch } from 'vue'
 import AuthDialog from './components/AuthDialog.vue'
 import GoalsDashboard from './components/GoalsDashboard.vue'
 import MiniCalendar from './components/MiniCalendar.vue'
@@ -45,6 +45,8 @@ const syncMessage = ref('')
 const syncToastVisible = ref(false)
 const selectedDate = ref(new Date())
 const calendarViewDate = ref(new Date(selectedDate.value))
+const windowWidth = ref(typeof window === 'undefined' ? 1920 : window.innerWidth)
+const rightPanelOpen = ref(false)
 const statsRangeStart = ref(toKey(new Date(new Date().setDate(new Date().getDate() - 6))))
 const statsRangeEnd = ref(toKey(new Date()))
 const authForm = reactive({
@@ -687,6 +689,50 @@ const readNextItems = computed(() => {
   ]
 })
 
+const isWideFocusSidebar = computed(() => windowWidth.value >= 1620)
+const isOverlayFocusSidebar = computed(() => windowWidth.value < 1280)
+const showInlineFocusSidebar = computed(() => !isOverlayFocusSidebar.value)
+const focusSidebarOuterClass = computed(() =>
+  showInlineFocusSidebar.value
+    ? isWideFocusSidebar.value
+      ? 'xl:w-[640px]'
+      : 'xl:w-full xl:max-w-[360px]'
+    : '',
+)
+const focusSidebarGridClass = computed(() =>
+  isWideFocusSidebar.value
+    ? '2xl:grid-cols-[280px_minmax(0,1fr)] 2xl:items-start'
+    : 'grid-cols-1',
+)
+const spreadScale = computed(() => {
+  const reservedWidth = windowWidth.value >= 1280 ? 410 : 96
+  const availableWidth = Math.max(windowWidth.value - reservedWidth, 980)
+  const baseWidth = 1548
+  const nextScale = Math.min(1, availableWidth / baseWidth)
+
+  return Number(Math.max(nextScale, 0.86).toFixed(3))
+})
+const spreadCanvasStyle = computed(() => {
+  const scale = spreadScale.value
+  return {
+    width: `${1548 * scale}px`,
+    minWidth: `${1548 * scale}px`,
+  }
+})
+const spreadPageFrameStyle = computed(() => {
+  const scale = spreadScale.value
+  return {
+    width: `${762 * scale}px`,
+    height: `${1118 * scale}px`,
+  }
+})
+const spreadPageStyle = computed(() => ({
+  width: '762px',
+  maxWidth: 'none',
+  transform: `scale(${spreadScale.value})`,
+  transformOrigin: 'top left',
+}))
+
 watch(
   [plannerRecords, selectedDate, calendarViewDate, statsRangeStart, statsRangeEnd],
   () => {
@@ -733,6 +779,22 @@ function areTaskLabelsNumbered(record) {
   return record.tasks.every((task, index) => task.label === createTaskLabel(index))
 }
 
+function updateWindowWidth() {
+  windowWidth.value = window.innerWidth
+
+  if (windowWidth.value >= 1280) {
+    rightPanelOpen.value = false
+  }
+}
+
+function openRightPanel() {
+  rightPanelOpen.value = true
+}
+
+function closeRightPanel() {
+  rightPanelOpen.value = false
+}
+
 function setSyncFeedback(status, message, options = {}) {
   const {
     visible = true,
@@ -1294,8 +1356,14 @@ onMounted(() => {
   setSyncFeedback('local', '로그인 후 클라우드 저장을 사용할 수 있습니다.', {
     visible: false,
   })
+  updateWindowWidth()
+  window.addEventListener('resize', updateWindowWidth)
   restoreAuthSession()
 })
+
+onBeforeUnmount(() => {
+  window.removeEventListener('resize', updateWindowWidth)
+})
 </script>
 
 <template>
@@ -1522,9 +1590,25 @@ onMounted(() => {
 
       <section
         v-else-if="screenMode === 'planner' && viewMode === 'focus'"
-        class="print-hidden grid gap-6 xl:h-full xl:min-h-0 xl:grid-cols-[minmax(0,1fr)_460px] 2xl:grid-cols-[minmax(0,1fr)_640px]"
+        class="print-hidden relative grid gap-6 xl:h-full xl:min-h-0"
+        :class="showInlineFocusSidebar ? 'xl:grid-cols-[minmax(0,1fr)_minmax(0,360px)] 2xl:grid-cols-[minmax(0,1fr)_640px]' : ''"
       >
+        <div
+          v-if="isOverlayFocusSidebar && rightPanelOpen"
+          class="fixed inset-0 z-30 bg-stone-900/18 backdrop-blur-[2px]"
+          @click="closeRightPanel"
+        />
+
         <div class="scrollbar-hide print-target rounded-[28px] border border-white/60 bg-white/45 p-4 shadow-[0_18px_60px_rgba(28,25,23,0.06)] xl:h-full xl:min-h-0 xl:overflow-y-auto xl:pr-3">
+          <div v-if="isOverlayFocusSidebar" class="mb-4 flex justify-end">
+            <button
+              type="button"
+              class="rounded-full border border-stone-200 bg-white px-4 py-2 text-[11px] font-bold tracking-[0.16em] text-stone-700 transition hover:border-stone-400 hover:text-ink"
+              @click="openRightPanel"
+            >
+              OPEN SIDE PANEL
+            </button>
+          </div>
           <PlannerPage
             :date-main="selectedDateDisplay.main"
             :date-weekday="selectedDateDisplay.weekday"
@@ -1547,9 +1631,29 @@ onMounted(() => {
           />
         </div>
 
-        <aside class="scrollbar-hide print-hidden rounded-[28px] border border-white/60 bg-white/50 p-3 shadow-[0_18px_60px_rgba(28,25,23,0.06)] xl:h-full xl:min-h-0 xl:overflow-y-auto">
-          <div class="grid gap-4 rounded-[22px] p-2 2xl:grid-cols-[280px_minmax(0,1fr)] 2xl:items-start">
-            <div class="grid gap-4">
+        <aside
+          v-if="showInlineFocusSidebar || rightPanelOpen"
+          class="scrollbar-hide print-hidden rounded-[28px] border border-white/60 bg-[#f7f2ea]/95 p-3 shadow-[0_18px_60px_rgba(28,25,23,0.12)]"
+          :class="[
+            focusSidebarOuterClass,
+            showInlineFocusSidebar
+              ? 'xl:h-full xl:min-h-0 xl:overflow-y-auto'
+              : 'fixed inset-y-4 right-4 z-40 w-[min(360px,calc(100vw-2rem))] overflow-y-auto',
+          ]"
+        >
+          <div v-if="!showInlineFocusSidebar" class="mb-3 flex items-center justify-between rounded-[18px] border border-stone-200 bg-white/90 px-4 py-3">
+            <p class="text-[11px] font-bold tracking-[0.18em] text-ink">SIDE PANEL</p>
+            <button
+              type="button"
+              class="rounded-full border border-stone-200 px-3 py-1 text-[10px] font-bold tracking-[0.14em] text-stone-600 transition hover:border-stone-400 hover:text-ink"
+              @click="closeRightPanel"
+            >
+              CLOSE
+            </button>
+          </div>
+
+          <div class="grid gap-4 rounded-[22px] p-2" :class="focusSidebarGridClass">
+            <div class="grid gap-4" :class="isWideFocusSidebar ? '' : 'max-w-[360px]'">
               <section class="2xl:w-[280px]">
                 <MiniCalendar
                   :month-label="monthLabel"
@@ -1632,7 +1736,7 @@ onMounted(() => {
               </section>
             </div>
 
-            <div class="grid gap-4">
+            <div class="grid gap-4" :class="isWideFocusSidebar ? '' : 'max-w-[360px]'">
               <section class="rounded-[24px] border border-stone-200 bg-white/82 p-5 shadow-[0_12px_36px_rgba(28,25,23,0.05)]">
                 <article>
                   <p class="text-[11px] font-bold tracking-[0.22em] text-ink">STATS</p>
@@ -1665,9 +1769,9 @@ onMounted(() => {
               </section>
             </div>
 
-            <section class="rounded-[24px] border border-stone-200 bg-white/82 p-5 shadow-[0_12px_36px_rgba(28,25,23,0.05)] 2xl:col-span-2">
+            <section class="rounded-[24px] border border-stone-200 bg-white/82 p-5 shadow-[0_12px_36px_rgba(28,25,23,0.05)]" :class="isWideFocusSidebar ? '2xl:col-span-2' : ''">
               <p class="mb-4 text-[11px] font-bold tracking-[0.22em] text-ink">READ NEXT</p>
-              <div class="grid gap-3 sm:grid-cols-3 2xl:grid-cols-3">
+              <div class="grid gap-3" :class="isWideFocusSidebar ? 'sm:grid-cols-3 2xl:grid-cols-3' : 'grid-cols-1'">
                 <p
                   v-for="item in readNextItems"
                   :key="item"
@@ -1678,9 +1782,9 @@ onMounted(() => {
               </div>
             </section>
 
-            <section class="rounded-[24px] border border-stone-200 bg-white/82 p-5 shadow-[0_12px_36px_rgba(28,25,23,0.05)] 2xl:col-span-2">
+            <section class="rounded-[24px] border border-stone-200 bg-white/82 p-5 shadow-[0_12px_36px_rgba(28,25,23,0.05)]" :class="isWideFocusSidebar ? '2xl:col-span-2' : ''">
               <p class="mb-4 text-[11px] font-bold tracking-[0.22em] text-ink">PREV SNAPSHOT</p>
-              <div class="grid gap-3 sm:grid-cols-3 2xl:grid-cols-3">
+              <div class="grid gap-3" :class="isWideFocusSidebar ? 'sm:grid-cols-3 2xl:grid-cols-3' : 'grid-cols-1'">
                 <p
                   v-for="item in prevSnapshotItems"
                   :key="item"
@@ -1698,9 +1802,10 @@ onMounted(() => {
         v-else-if="screenMode === 'planner'"
         class="scrollbar-hide print-hidden overflow-x-auto rounded-[28px] border border-white/60 bg-white/45 p-4 shadow-[0_18px_60px_rgba(28,25,23,0.06)] sm:p-6 xl:h-full xl:overflow-y-auto"
       >
-        <div class="flex min-w-[1260px] gap-6">
-          <div class="print-target">
+        <div class="mx-auto flex gap-6" :style="spreadCanvasStyle">
+          <div class="print-target overflow-hidden" :style="spreadPageFrameStyle">
             <PlannerPage
+              :style="spreadPageStyle"
               :date-main="selectedDateDisplay.main"
               :date-weekday="selectedDateDisplay.weekday"
               :date-weekday-tone="selectedDateDisplay.weekdayTone"
@@ -1721,8 +1826,9 @@ onMounted(() => {
               @update:timetable="updateTimetable(planner, $event)"
             />
           </div>
-          <div class="print-hidden">
+          <div class="print-hidden overflow-hidden" :style="spreadPageFrameStyle">
             <PlannerPage
+              :style="spreadPageStyle"
               :date-main="secondaryDateDisplay.main"
               :date-weekday="secondaryDateDisplay.weekday"
               :date-weekday-tone="secondaryDateDisplay.weekdayTone"