diff --git a/frontend/src/App.vue b/frontend/src/App.vue
index 4dc1caa..d0962e6 100644
--- a/frontend/src/App.vue
+++ b/frontend/src/App.vue
@@ -874,13 +874,14 @@ onMounted(bootstrap)
       </div>
     </aside>
 
-    <div v-if="mobileMore" class="more-mask" @click.self="mobileMore=false;switchView('settings')"><section id="mobile-more-menu" class="more-sheet" role="dialog" aria-modal="true" aria-label="更多导航" @click.stop><div class="more-sheet-head"><b>更多</b><button class="icon" aria-label="关闭更多菜单" @click="mobileMore=false"><X/></button></div><button @click="switchView('settings')"><Settings/>设置与数据</button></section></div>
+    <div v-if="mobileMore" class="more-mask app-sheet-mask" @click.self="mobileMore=false;switchView('settings')"><section id="mobile-more-menu" class="more-sheet app-sheet app-sheet--actions" role="dialog" aria-modal="true" aria-label="更多导航" @click.stop><div class="more-sheet-head app-sheet__header"><b>更多</b><button class="icon" aria-label="关闭更多菜单" @click="mobileMore=false"><X/></button></div><div class="app-sheet__body"><button @click="switchView('settings')"><Settings/>设置与数据</button></div></section></div>
     <nav class="bottom" aria-label="主要导航"><button :class="{active:activeView==='today'}" @click="switchView('today')"><ListTodo/><span>今天</span></button><button :class="{active:activeView==='habits'}" @click="switchView('habits')"><Repeat2/><span>习惯</span></button><button :class="{active:activeView==='countdowns'}" @click="switchView('countdowns')"><CalendarHeart/><span>倒数日</span></button><button :class="{active:activeView==='tasks'||activeView==='upcoming'||activeView==='trash'||activeView==='settings'}" @click="switchView('settings')"><Settings/><span>设置</span></button></nav>
     <FloatingAddButton v-if="['tasks','today','upcoming','habits','countdowns'].includes(activeView)" :label="activeView==='habits' ? '添加习惯' : activeView==='countdowns' ? '添加倒数日' : '添加任务'" @activate="activateFloatingAdd" />
     <Transition name="task-compose">
-      <div v-if="taskComposeOpen" class="task-compose-mask" @click.self="closeTaskCompose">
-        <form class="task-compose-sheet" :style="taskComposeStyle" role="dialog" aria-modal="true" aria-labelledby="task-compose-title" @submit.prevent="submitTaskCompose">
-          <header><div><small>NEW TASK</small><h2 id="task-compose-title">{{ taskComposeTitle }}</h2></div><button class="icon" type="button" aria-label="关闭添加任务" @click="closeTaskCompose"><X/></button></header>
+      <div v-if="taskComposeOpen" class="task-compose-mask app-sheet-mask" @click.self="closeTaskCompose">
+        <form class="task-compose-sheet app-sheet app-sheet--create" :style="taskComposeStyle" role="dialog" aria-modal="true" aria-labelledby="task-compose-title" @submit.prevent="submitTaskCompose">
+          <header class="app-sheet__header"><div><small>NEW TASK</small><h2 id="task-compose-title">{{ taskComposeTitle }}</h2></div><button class="icon" type="button" aria-label="关闭添加任务" @click="closeTaskCompose"><X/></button></header>
+          <div class="app-sheet__body">
           <label>任务名称<input v-model="composeTitle" class="task-compose-input" placeholder="准备做点什么？" autocomplete="off"></label>
           <div class="task-compose-row"><label>清单<select v-model="composeListId"><option v-for="list in lists" :key="list.id" :value="list.id">{{list.name}}</option></select></label><label>优先级<select v-model.number="composePriority"><option :value="0">无</option><option :value="1">低</option><option :value="2">中</option><option :value="3">高</option></select></label></div>
           <div class="task-compose-date-actions" aria-label="截止时间">
@@ -897,7 +898,8 @@ onMounted(bootstrap)
           <label>重复<select v-model="composeRepeat" :disabled="!composeDueAt"><option value="none">不重复</option><option value="daily">每天</option><option value="weekly">每周</option><option value="monthly">每月</option><option value="yearly">每年</option><option value="custom">自定义…</option></select><small v-if="!composeDueAt" class="field-hint">设置截止时间后可重复</small></label>
           <section v-if="composeRepeat==='custom'" class="repeat-custom-fields"><div><span>每隔</span><input v-model.number="composeRepeatConfig.interval" type="number" min="1"><select v-model="composeRepeatConfig.frequency"><option value="daily">天</option><option value="weekly">周</option><option value="monthly">月</option><option value="yearly">年</option></select></div><label v-if="composeRepeatConfig.frequency==='weekly'">重复日期<span class="weekday-picker"><label v-for="day in weekdayOptions" :key="day.value"><input v-model="composeRepeatConfig.weekdays" type="checkbox" :value="day.value">{{day.label}}</label></span></label><label v-if="composeRepeatConfig.frequency==='monthly'">每月日期<input v-model.number="composeRepeatConfig.monthDays![0]" type="number" min="1" max="31"></label><label>结束方式<select v-model="composeRepeatConfig.endMode"><option value="never">永不结束</option><option value="date">指定日期</option><option value="count">重复次数</option></select></label><label v-if="composeRepeatConfig.endMode==='date'">结束日期<input v-model="composeRepeatConfig.until" type="date"></label><label v-if="composeRepeatConfig.endMode==='count'">重复次数<input v-model.number="composeRepeatConfig.count" type="number" min="1"></label></section>
           <label>备注<textarea v-model="composeDescription" rows="3" placeholder="可选，支持 Markdown"/></label>
-          <footer><button type="button" class="secondary" @click="closeTaskCompose">取消</button><button class="primary-small" :disabled="!composeTitle.trim() || !composeListId">添加任务</button></footer>
+          </div>
+          <footer class="app-sheet__footer"><button type="button" class="secondary" @click="closeTaskCompose">取消</button><button class="primary-small" :disabled="!composeTitle.trim() || !composeListId">添加任务</button></footer>
         </form>
       </div>
     </Transition>
diff --git a/frontend/src/CountdownPanel.test.ts b/frontend/src/CountdownPanel.test.ts
index a495ab8..3912b72 100644
--- a/frontend/src/CountdownPanel.test.ts
+++ b/frontend/src/CountdownPanel.test.ts
@@ -21,7 +21,7 @@ describe('countdown modal accessibility', () => {
     expect(source).toContain('item.id !== focusItem.value?.id')
     expect(source).toContain('`kind-${item.kind}`')
     expect(source).toContain(':class="`kind-${focusItem.kind}`"')
-    expect(source).toContain('class="countdown-detail-sheet"')
+    expect(source).toContain('class="countdown-detail-sheet app-sheet app-sheet--detail"')
     expect(source).toContain('ref="detailCloseButton"')
     expect(source).toContain('detailCloseButton.value?.focus()')
     expect(source).toContain('@keydown="trapDetailFocus"')
diff --git a/frontend/src/CountdownPanel.vue b/frontend/src/CountdownPanel.vue
index 1d1fc8b..c4b9c12 100644
--- a/frontend/src/CountdownPanel.vue
+++ b/frontend/src/CountdownPanel.vue
@@ -195,17 +195,17 @@ onBeforeUnmount(() => { previousFocus = null })
       <div v-if="showArchived" class="archived-countdowns"><article v-for="item in archived" :key="item.id"><b>{{item.title}}</b><small>{{formatDateShort(item.display_date)}}<template v-if="item.lunar_text"> · {{item.lunar_text}}</template><template v-if="item.calendar_mode==='lunar'"> · 农历</template></small><button @click="restore(item)"><ArchiveRestore/>恢复</button><button class="danger-text" @click="purge(item)"><Trash2/>永久删除</button></article></div>
     </div>
     <Transition name="countdown-detail">
-      <div v-if="detailItem" class="countdown-detail-mask" @click.self="closeDetail"><article class="countdown-detail-sheet" role="dialog" aria-modal="true" aria-labelledby="countdown-detail-title" @keydown.esc="closeDetail" @keydown="trapDetailFocus">
-        <header><div><small>重要日子详情</small><h3 id="countdown-detail-title">{{detailItem.title}}</h3></div><button ref="detailCloseButton" type="button" aria-label="关闭详情" @click="closeDetail"><X/></button></header>
-        <div class="countdown-detail-days"><strong>{{detailItem.days===0?'今天':Math.abs(detailItem.days)}}</strong><span v-if="detailItem.days!==0">天</span><b>{{countdownDayText(detailItem.days)}}</b></div>
-        <dl><div><dt>日期</dt><dd>{{primaryDate(detailItem)}}</dd></div><div v-if="secondaryDate(detailItem)"><dt>换算</dt><dd>{{secondaryDate(detailItem)}}</dd></div><div><dt>类型</dt><dd>{{countdownKindLabel(detailItem.kind)}} · {{detailItem.calendar_mode==='lunar'?'农历':'公历'}} · {{repeatBadge(detailItem) || '不重复'}}</dd></div></dl>
-        <footer><button v-if="!detailItem.pinned" type="button" @click="pin(detailItem)"><Pin/>置顶</button><button type="button" @click="edit(detailItem)"><Pencil/>编辑</button><button type="button" class="danger-text" @click="archiveItem(detailItem)"><Archive/>归档</button></footer>
+      <div v-if="detailItem" class="countdown-detail-mask app-sheet-mask" @click.self="closeDetail"><article class="countdown-detail-sheet app-sheet app-sheet--detail" role="dialog" aria-modal="true" aria-labelledby="countdown-detail-title" @keydown.esc="closeDetail" @keydown="trapDetailFocus">
+        <header class="app-sheet__header"><div><small>重要日子详情</small><h3 id="countdown-detail-title">{{detailItem.title}}</h3></div><button ref="detailCloseButton" type="button" aria-label="关闭详情" @click="closeDetail"><X/></button></header>
+        <div class="app-sheet__body"><div class="countdown-detail-days"><strong>{{detailItem.days===0?'今天':Math.abs(detailItem.days)}}</strong><span v-if="detailItem.days!==0">天</span><b>{{countdownDayText(detailItem.days)}}</b></div>
+        <dl><div><dt>日期</dt><dd>{{primaryDate(detailItem)}}</dd></div><div v-if="secondaryDate(detailItem)"><dt>换算</dt><dd>{{secondaryDate(detailItem)}}</dd></div><div><dt>类型</dt><dd>{{countdownKindLabel(detailItem.kind)}} · {{detailItem.calendar_mode==='lunar'?'农历':'公历'}} · {{repeatBadge(detailItem) || '不重复'}}</dd></div></dl></div>
+        <footer class="app-sheet__footer"><button v-if="!detailItem.pinned" type="button" @click="pin(detailItem)"><Pin/>置顶</button><button type="button" @click="edit(detailItem)"><Pencil/>编辑</button><button type="button" class="danger-text" @click="archiveItem(detailItem)"><Archive/>归档</button></footer>
       </article></div>
     </Transition>
     <Transition name="countdown-compose">
-      <div v-if="open" class="countdown-modal-mask" @click.self="closeDialog"><form class="countdown-modal" :style="composerStyle" role="dialog" aria-modal="true" aria-labelledby="countdown-dialog-title" @submit.prevent="save" @keydown.esc="closeDialog" @keydown="trapDialogFocus">
-        <header><div><small>{{editingId?'调整重要日子':'快速记下重要日子'}}</small><h3 id="countdown-dialog-title">{{editingId?'编辑倒数日':'新建倒数日'}}</h3></div><button type="button" aria-label="关闭" @click="closeDialog"><X/></button></header>
-        <label>名称<input ref="titleInput" v-model="form.title" maxlength="200" required placeholder="例如：去北海道旅行" autofocus></label>
+      <div v-if="open" class="countdown-modal-mask app-sheet-mask" @click.self="closeDialog"><form class="countdown-modal app-sheet app-sheet--create" :style="composerStyle" role="dialog" aria-modal="true" aria-labelledby="countdown-dialog-title" @submit.prevent="save" @keydown.esc="closeDialog" @keydown="trapDialogFocus">
+        <header class="app-sheet__header"><div><small>{{editingId?'调整重要日子':'快速记下重要日子'}}</small><h3 id="countdown-dialog-title">{{editingId?'编辑倒数日':'新建倒数日'}}</h3></div><button type="button" aria-label="关闭" @click="closeDialog"><X/></button></header>
+        <div class="app-sheet__body"><label>名称<input ref="titleInput" v-model="form.title" maxlength="200" required placeholder="例如：去北海道旅行" autofocus></label>
         <label v-if="form.calendar_mode==='solar'">日期<input v-model="form.event_date" type="date" required></label>
         <label>类型<select v-model="form.kind" @change="applyKindDefaults"><option value="countdown">倒数日</option><option value="anniversary">纪念日</option><option value="birthday">生日</option></select></label>
         <details class="countdown-advanced" :open="showAdvanced" @toggle="showAdvanced=($event.target as HTMLDetailsElement).open"><summary><span>更多设置</span><ChevronDown/></summary>
@@ -218,8 +218,8 @@ onBeforeUnmount(() => { previousFocus = null })
           <label v-if="form.calendar_mode==='lunar'"><input v-model="form.leap_month" type="checkbox"> 闰月（如果是闰月，勾选这里）</label>
           <label><input v-model="form.ignore_year" type="checkbox"> 忽略年份<span v-if="form.calendar_mode==='lunar'">，每年按农历计算</span></label>
           <label>重复<select v-model="form.repeat_rule" :disabled="form.ignore_year"><option value="none">不重复</option><option value="weekly">每周</option><option value="monthly">每月</option><option value="yearly">每年</option></select></label>
-        </details>
-        <footer><button type="button" class="secondary" @click="closeDialog">取消</button><button class="primary-small">保存</button></footer>
+        </details></div>
+        <footer class="app-sheet__footer"><button type="button" class="secondary" @click="closeDialog">取消</button><button class="primary-small">保存</button></footer>
       </form></div>
     </Transition>
   </section>
diff --git a/frontend/src/MvpPanel.vue b/frontend/src/MvpPanel.vue
index b005268..cba1ca0 100644
--- a/frontend/src/MvpPanel.vue
+++ b/frontend/src/MvpPanel.vue
@@ -457,12 +457,12 @@ onBeforeUnmount(() => {
 
       <!-- 完整习惯列表 -->
       <Transition name="task-compose">
-        <div v-if="habitComposerOpen" class="task-compose-mask" @click.self="closeHabitComposer">
-          <form class="task-compose-sheet habit-compose-sheet" :style="habitComposeStyle" role="dialog" aria-modal="true" aria-labelledby="habit-compose-title" @submit.prevent="addHabit" @keydown.esc="closeHabitComposer">
-            <header><div><small>NEW HABIT</small><h2 id="habit-compose-title">添加习惯</h2></div><button class="icon" type="button" aria-label="关闭添加习惯" @click="closeHabitComposer"><X /></button></header>
-            <label>习惯名称<input ref="habitNameInput" v-model="habitName" placeholder="例如：每天喝水 8 杯" aria-label="新习惯名称"></label>
-            <div class="task-compose-row"><label>记录方式<select v-model="habitType" aria-label="习惯类型"><option value="boolean">完成 / 未完成</option><option value="numeric">按数量记录</option></select></label><label v-if="habitType === 'numeric'">目标值<input v-model.number="habitTarget" type="number" min="0" step="any" aria-label="目标值"></label></div>
-            <footer><button type="button" class="secondary" @click="closeHabitComposer">取消</button><button class="primary-small" :disabled="!habitName.trim()">添加习惯</button></footer>
+        <div v-if="habitComposerOpen" class="task-compose-mask app-sheet-mask" @click.self="closeHabitComposer">
+          <form class="task-compose-sheet habit-compose-sheet app-sheet app-sheet--create" :style="habitComposeStyle" role="dialog" aria-modal="true" aria-labelledby="habit-compose-title" @submit.prevent="addHabit" @keydown.esc="closeHabitComposer">
+            <header class="app-sheet__header"><div><small>NEW HABIT</small><h2 id="habit-compose-title">添加习惯</h2></div><button class="icon" type="button" aria-label="关闭添加习惯" @click="closeHabitComposer"><X /></button></header>
+            <div class="app-sheet__body"><label>习惯名称<input ref="habitNameInput" v-model="habitName" placeholder="例如：每天喝水 8 杯" aria-label="新习惯名称"></label>
+            <div class="task-compose-row"><label>记录方式<select v-model="habitType" aria-label="习惯类型"><option value="boolean">完成 / 未完成</option><option value="numeric">按数量记录</option></select></label><label v-if="habitType === 'numeric'">目标值<input v-model.number="habitTarget" type="number" min="0" step="any" aria-label="目标值"></label></div></div>
+            <footer class="app-sheet__footer"><button type="button" class="secondary" @click="closeHabitComposer">取消</button><button class="primary-small" :disabled="!habitName.trim()">添加习惯</button></footer>
           </form>
         </div>
       </Transition>
@@ -487,11 +487,11 @@ onBeforeUnmount(() => {
         <div v-if="!habits.length && !busy" class="empty-panel">还没有习惯，从一件容易坚持的小事开始。</div>
       </div>
       <Transition name="countdown-detail">
-        <div v-if="selectedHabit" class="habit-detail-mask" @click.self="closeHabitDetail">
-          <article ref="habitDetailSheet" class="habit-detail-sheet" role="dialog" aria-modal="true" aria-labelledby="habit-detail-title" tabindex="-1" @keydown.esc="closeHabitDetail">
-            <header><div><small>习惯详情</small><h3 id="habit-detail-title">{{ selectedHabit.name }}</h3></div><button type="button" aria-label="关闭习惯详情" @click="closeHabitDetail"><X/></button></header>
-            <div class="habit-detail-progress"><span>今日进度</span><strong>{{ habitProgressText(selectedHabit) || (isDone(selectedHabit, todayKey) ? '已完成' : '未完成') }}</strong></div>
-            <footer><button type="button" class="danger-text" @click="archiveHabit(selectedHabit)"><ArchiveRestore/>归档习惯</button><button type="button" class="danger-text habit-delete-button" @click="deleteHabit(selectedHabit)"><Trash2/>永久删除</button></footer>
+        <div v-if="selectedHabit" class="habit-detail-mask app-sheet-mask" @click.self="closeHabitDetail">
+          <article ref="habitDetailSheet" class="habit-detail-sheet app-sheet app-sheet--detail" role="dialog" aria-modal="true" aria-labelledby="habit-detail-title" tabindex="-1" @keydown.esc="closeHabitDetail">
+            <header class="app-sheet__header"><div><small>习惯详情</small><h3 id="habit-detail-title">{{ selectedHabit.name }}</h3></div><button type="button" aria-label="关闭习惯详情" @click="closeHabitDetail"><X/></button></header>
+            <div class="app-sheet__body"><div class="habit-detail-progress"><span>今日进度</span><strong>{{ habitProgressText(selectedHabit) || (isDone(selectedHabit, todayKey) ? '已完成' : '未完成') }}</strong></div><button type="button" class="soft-button" @click="archiveHabit(selectedHabit)"><ArchiveRestore/>归档习惯</button></div>
+            <footer class="app-sheet__danger"><button type="button" class="danger-text habit-delete-button" @click="deleteHabit(selectedHabit)"><Trash2/>永久删除</button></footer>
           </article>
         </div>
       </Transition>
diff --git a/frontend/src/style.css b/frontend/src/style.css
index c62dd08..dd332b9 100644
--- a/frontend/src/style.css
+++ b/frontend/src/style.css
@@ -1,6 +1,6 @@
 @import "tailwindcss";
 
-:root{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Noto Sans CJK SC",sans-serif;color:#2d2924;background:#f8f3e8;--accent:#f15a29;--accent-soft:#fbe6dc;--paper:#fffdf8;--sidebar:#f6f0e4;--line:#e7ddcc;--muted:#8b8275;--danger:#bd3827;--shadow:0 12px 36px rgba(78,58,34,.10)}
+:root{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Noto Sans CJK SC",sans-serif;color:#2d2924;background:#f8f3e8;--accent:#f15a29;--accent-soft:#fbe6dc;--paper:#fffdf8;--sidebar:#f6f0e4;--line:#e7ddcc;--muted:#8b8275;--danger:#bd3827;--shadow:0 12px 36px rgba(78,58,34,.10);--sheet-radius:20px;--sheet-scrim:rgba(45,38,31,.4)}
 *{box-sizing:border-box}html{-webkit-text-size-adjust:100%;text-size-adjust:100%}body{margin:0;background:#f8f3e8}button,input,textarea,select{font:inherit;color:inherit}@media(max-width:800px){input,textarea,select{font-size:16px}}button{cursor:pointer}svg{width:18px;height:18px;stroke-width:1.8}.center,.auth-shell{min-height:100vh;display:grid;place-items:center}.center{gap:12px;align-content:center;color:var(--muted)}.loader{width:24px;height:24px;border:2px solid var(--line);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}
 .auth-shell{background:radial-gradient(circle at 20% 10%,#ffe3d5 0,transparent 28%),linear-gradient(135deg,#f8f3e8,#fffaf0)}.auth-card{width:min(390px,90vw);padding:38px;background:var(--paper);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);display:grid;gap:16px}.brand{font-size:40px;font-weight:850;letter-spacing:-3px}.brand span{color:var(--accent)}.brand.small{font-size:29px}.auth-card p{margin:0 0 8px;color:var(--muted)}.auth-card label,.detail-form>label{display:grid;gap:7px;font-size:12px;font-weight:650;color:#756d61}.auth-card input,.detail-form input,.detail-form select{width:100%;border:1px solid var(--line);background:#fff;padding:11px;border-radius:9px;outline:none}.auth-card input:focus,.detail-form input:focus,.detail-form select:focus,.detail-form textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(241,90,41,.1)}.primary{border:0;background:var(--accent);color:#fff;padding:12px;border-radius:9px;font-weight:700;box-shadow:0 5px 12px rgba(241,90,41,.2)}.auth-card small{color:var(--danger)}
 .shell{height:100vh;display:grid;grid-template-columns:238px minmax(430px,1fr) 0;background:var(--paper);overflow:hidden;transition:grid-template-columns .22s ease}.shell.detail-open{grid-template-columns:238px minmax(430px,1fr) 350px}.shell.sidebar-collapsed{grid-template-columns:0 minmax(430px,1fr) 0}.shell.sidebar-collapsed.detail-open{grid-template-columns:0 minmax(430px,1fr) 350px}.shell.sidebar-collapsed .sidebar{width:0;min-width:0;overflow:hidden;border-right:0;padding:0}.sidebar{border-right:1px solid var(--line);background:var(--sidebar);display:flex;flex-direction:column;min-height:0;overflow:hidden}.brand-row{height:76px;padding:0 20px;display:flex;align-items:center;justify-content:space-between}.primary-nav{display:grid;padding:4px 12px 12px;gap:3px}.primary-nav button,.settings{display:flex;align-items:center;gap:10px;border:0;background:transparent;padding:10px 12px;border-radius:9px;color:#665e52;text-align:left}.primary-nav button:hover,.list-row:hover,.folder-row>button:hover{background:rgba(255,255,255,.52)}.primary-nav button.active,.list-row.active{background:var(--accent-soft);color:#b7421e;font-weight:700}.section-title{padding:17px 17px 7px 22px;display:flex;justify-content:space-between;align-items:center;color:#958b7d;text-transform:uppercase;letter-spacing:.08em;font-size:11px;font-weight:750}.section-title>span:last-child{display:flex}.mini-icon,.row-actions button{min-width:44px;min-height:44px;border:0;background:transparent;padding:4px;color:#8e8477}.mini-icon svg,.row-actions svg{width:14px;height:14px}.folders{flex:1;min-height:0;padding:0 10px;overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch;scrollbar-width:none}.folders::-webkit-scrollbar{display:none}.folder-row,.list-row{position:relative;display:flex;align-items:center;border-radius:8px}.folder-row>button,.list-row-main{flex:1;min-width:0;border:0;background:transparent;padding:8px;display:flex;align-items:center;gap:7px;color:#6d6559;text-align:left}.folder-row>button>span,.list-row-main>span{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.folder-row>button svg{width:14px}.row-actions{display:flex;position:absolute;right:0;opacity:0;pointer-events:none;transition:opacity .15s}.folder-row:hover .row-actions,.folder-row:focus-within .row-actions,.list-row:hover .row-actions,.list-row:focus-within .row-actions{opacity:1;pointer-events:auto}.list-row-main{width:100%;min-height:44px;padding:8px 7px 8px 31px;color:#665f55}.list-row.active .list-row-main{color:inherit}.list-row i{flex:0 0 8px;width:8px;height:8px;background:#d89b62;border-radius:3px}.settings{margin:auto 12px 14px}.mobile-only,.bottom{display:none}.scrim{display:none}
@@ -31,7 +31,10 @@ main{min-width:0;padding:27px 34px 50px;overflow:auto;background:linear-gradient
 .settings-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.tool-card{display:flex;flex-direction:column;align-items:flex-start;gap:10px}.tool-card>svg{color:var(--accent);width:25px;height:25px}.tool-card p{margin:0;color:var(--muted);font-size:13px}.tool-card.wide{grid-column:1/-1}.password-form{width:100%;display:grid;gap:10px}.password-form label{display:grid;gap:6px;color:#675f54;font-size:12px;font-weight:650}.password-form input{width:100%;border:1px solid var(--line);background:#fff;border-radius:10px;padding:11px 12px;outline:none}.password-form input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(241,90,41,.1)}.password-form button{justify-self:start}.file-button input{display:none}.tool-card pre{width:100%;max-height:180px;overflow:auto;background:#f8f3e8;padding:10px;border-radius:8px;font-size:10px}.session-row,.audit-row{width:100%;display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);padding:9px 0}.session-row span{display:grid}.session-row small,.audit-row small{color:var(--muted);font-size:11px}.inline-error{padding:9px;border-radius:8px;color:var(--danger);background:#fff0ed}.settings.active{background:var(--accent-soft);color:#b7421e;font-weight:700}
 @media(max-width:930px){.task-row,.habit-row,.countdown-row{min-height:62px;background:#fff;border:1px solid var(--line);border-radius:13px;box-shadow:none}.task-list,.habit-list,.countdown-timeline{display:grid;gap:8px}.task-row{padding:4px 7px}.task-row:hover,.task-row.selected{background:#fffaf5}.habit-row{padding:4px 7px}.countdown-row,.countdown-row:first-of-type{border:1px solid var(--line)}.countdown-row{grid-template-columns:minmax(0,1fr) 72px;padding:8px 9px;gap:8px}.task-main strong,.habit-name,.countdown-main>b{font-size:14px;font-weight:650}.meta,.countdown-main>small,.countdown-state small{font-size:11px;color:var(--muted)}.habit-progress{font-size:16px}.drag-handle{width:36px;flex-basis:36px}.task-check{width:44px;flex-basis:44px}.countdown-icon{width:36px;height:36px;border-radius:10px}.countdown-state strong{font-size:24px}.countdown-group{gap:8px}.countdown-group>h3{padding-left:3px}.habit-detail-mask{padding:0}.habit-detail-sheet{width:100%;border-radius:22px 22px 0 0;padding:18px 16px calc(18px + env(safe-area-inset-bottom))}}
 @media(max-width:800px){.settings-grid{grid-template-columns:1fr}.tool-card.wide{grid-column:auto}.habit-main{padding:10px 2px}.numeric-action input{width:62px}}
-.unified-fab{display:grid;place-items:center;position:fixed;z-index:60;right:20px;bottom:22px;width:56px;height:56px;border:0;border-radius:50%;background:var(--accent);color:#fff;box-shadow:0 8px 20px rgba(241,90,41,.28);transition:transform .16s ease,box-shadow .16s ease;touch-action:none;user-select:none}.unified-fab svg{width:25px;height:25px}.unified-fab:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(241,90,41,.32)}.unified-fab:active{transform:scale(.96)}.unified-fab.dragging{transform:scale(1.06);box-shadow:0 12px 28px rgba(241,90,41,.36)}.task-compose-mask{position:fixed;z-index:70;inset:0;background:rgba(45,38,31,.34);display:flex;align-items:flex-end;padding:0}.task-compose-sheet{width:100%;max-height:min(88dvh,720px);overflow:auto;background:#fffdf8;border-radius:24px 24px 0 0;padding:18px 18px calc(20px + env(safe-area-inset-bottom));box-shadow:0 -16px 42px rgba(56,40,24,.2);display:grid;gap:14px;transform-origin:var(--fab-origin-x,calc(100% - 44px)) var(--fab-origin-y,100%)}.task-compose-sheet header{display:flex;align-items:center;justify-content:space-between}.task-compose-sheet header small{color:var(--accent);font-size:10px;font-weight:800;letter-spacing:.12em}.task-compose-sheet h2{margin:2px 0 0;font-size:22px}.task-compose-sheet label{display:grid;gap:6px;color:#675f54;font-size:12px;font-weight:650}.task-compose-sheet input,.task-compose-sheet select,.task-compose-sheet textarea{width:100%;border:1px solid var(--line);background:#fff;border-radius:11px;padding:12px;outline:none;resize:vertical}.task-compose-sheet input:focus,.task-compose-sheet select:focus,.task-compose-sheet textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(241,90,41,.1)}.task-compose-row{display:grid;grid-template-columns:minmax(0,1fr) 105px;gap:10px}.task-compose-date-actions{display:flex;flex-wrap:wrap;align-items:center;gap:8px}.task-compose-date-control{display:flex;align-items:center;min-width:0}.task-compose-date-chip{position:relative;display:inline-flex!important;grid-template-columns:none!important;align-items:center;flex-direction:row!important;gap:7px!important;width:auto;min-height:40px;padding:0 12px;border:1px solid var(--line);border-radius:999px;background:#fffaf3;color:#776e62!important;font-size:13px!important;font-weight:700!important;overflow:hidden;cursor:pointer}.task-compose-date-chip.selected{border-color:#f3b18f;background:var(--accent-soft);color:#b7421e!important}.task-compose-date-chip svg{width:16px;height:16px;flex:none}.task-compose-native-picker{position:absolute;inset:0;opacity:0;cursor:pointer;padding:0!important;border:0!important}.task-compose-date-clear{display:grid;place-items:center;width:34px;height:34px;margin-left:2px;border:0;border-radius:50%;background:transparent;color:var(--muted)}.task-compose-date-clear:hover{background:#f5eee5;color:var(--text)}.task-compose-date-clear svg{width:15px;height:15px}.task-compose-time-add{min-width:0;height:40px;padding:0 13px;border:1px dashed #e5b89d;border-radius:999px;background:transparent;color:var(--accent);font-weight:700}.task-compose-time-add:hover{border-color:var(--accent);background:#fff4e8}.task-compose-time-chip{display:inline-flex!important;grid-template-columns:none!important;align-items:center;flex-direction:row!important;gap:5px!important;width:auto;color:var(--muted)!important;font-size:12px!important}.task-compose-time-chip input{width:102px!important;min-width:0;padding:9px 8px!important;border-radius:999px!important}.task-compose-time-remove{display:grid;place-items:center;flex:0 0 34px;width:34px;height:34px;border:0;border-radius:50%;background:transparent;color:var(--muted)}.task-compose-time-remove:hover{background:#f5eee5;color:var(--text)}.task-compose-time-remove svg{width:15px;height:15px}.task-compose-sheet footer{display:flex;justify-content:flex-end;gap:9px;padding-top:4px}.task-compose-sheet button:disabled{opacity:.45}.task-compose-enter-active,.task-compose-leave-active{transition:background .22s ease}.task-compose-enter-active .task-compose-sheet,.task-compose-leave-active .task-compose-sheet{transition:transform .28s cubic-bezier(.2,.9,.25,1.08),opacity .2s ease}.task-compose-enter-from,.task-compose-leave-to{background:rgba(45,38,31,0)}.task-compose-enter-from .task-compose-sheet,.task-compose-leave-to .task-compose-sheet{transform:translateY(36px) scale(.86);opacity:0}
+.unified-fab{display:grid;place-items:center;position:fixed;z-index:60;right:20px;bottom:22px;width:56px;height:56px;border:0;border-radius:50%;background:var(--accent);color:#fff;box-shadow:0 8px 20px rgba(241,90,41,.28);transition:transform .16s ease,box-shadow .16s ease;touch-action:none;user-select:none}.unified-fab svg{width:25px;height:25px}.unified-fab:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(241,90,41,.32)}.unified-fab:active{transform:scale(.96)}.unified-fab.dragging{transform:scale(1.06);box-shadow:0 12px 28px rgba(241,90,41,.36)}.app-sheet-mask.app-sheet-mask{background:var(--sheet-scrim);overscroll-behavior:contain}.app-sheet{min-height:0;overflow:hidden;background:var(--paper)}.app-sheet__header{min-height:64px;flex:0 0 64px;position:sticky;z-index:3;top:0;background:var(--paper);border-bottom:1px solid var(--line);padding:0 18px}.app-sheet__header>div{min-width:0}.app-sheet__header h2,.app-sheet__header h3{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.app-sheet__header>button{width:44px;height:44px;flex:0 0 44px;display:grid;place-items:center;border:0;background:transparent;border-radius:10px}.app-sheet__body{min-height:0;overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch;display:grid;gap:14px;padding:16px 18px}.app-sheet__footer{position:sticky;bottom:0;z-index:3;margin:0;background:var(--paper);border-top:1px solid var(--line);padding:12px 18px;padding-bottom:calc(16px + env(safe-area-inset-bottom));display:flex;justify-content:flex-end;gap:8px}.app-sheet__danger{border-top:1px solid #f1d4cd;background:#fff8f6;padding:12px 18px;padding-bottom:calc(16px + env(safe-area-inset-bottom));display:flex;justify-content:flex-end}.app-sheet--actions .app-sheet__body{gap:6px;padding:8px 16px calc(16px + env(safe-area-inset-bottom))}.app-sheet--actions .app-sheet__body>button{min-height:50px;width:100%;display:flex;align-items:center;gap:12px;border:0;background:#fff;padding:13px;border-radius:12px;text-align:left}
+@media(max-width:930px){.app-sheet{width:100%;max-height:min(88dvh,760px);display:flex!important;flex-direction:column!important;overflow:hidden!important;border-radius:var(--sheet-radius) var(--sheet-radius) 0 0!important;padding:0!important}.app-sheet--detail,.app-sheet--create{max-width:none!important}.app-sheet-mask{padding:0!important;place-items:end center!important;align-items:flex-end!important}.app-sheet__header{display:flex!important;align-items:center!important;justify-content:space-between!important;width:100%}.app-sheet__body{width:100%;flex:1 1 auto}.app-sheet__body label{display:grid;gap:6px}.app-sheet__footer{width:100%;flex:0 0 auto}.app-sheet__footer .primary-small{min-width:124px}.app-sheet__danger{width:100%;flex:0 0 auto}.app-sheet__danger .danger-text{width:100%;min-height:48px;justify-content:center}}
+
+.task-compose-mask{position:fixed;z-index:70;inset:0;background:rgba(45,38,31,.34);display:flex;align-items:flex-end;padding:0}.task-compose-sheet{width:100%;max-height:min(88dvh,720px);overflow:auto;background:#fffdf8;border-radius:24px 24px 0 0;padding:18px 18px calc(20px + env(safe-area-inset-bottom));box-shadow:0 -16px 42px rgba(56,40,24,.2);display:grid;gap:14px;transform-origin:var(--fab-origin-x,calc(100% - 44px)) var(--fab-origin-y,100%)}.task-compose-sheet header{display:flex;align-items:center;justify-content:space-between}.task-compose-sheet header small{color:var(--accent);font-size:10px;font-weight:800;letter-spacing:.12em}.task-compose-sheet h2{margin:2px 0 0;font-size:22px}.task-compose-sheet label{display:grid;gap:6px;color:#675f54;font-size:12px;font-weight:650}.task-compose-sheet input,.task-compose-sheet select,.task-compose-sheet textarea{width:100%;border:1px solid var(--line);background:#fff;border-radius:11px;padding:12px;outline:none;resize:vertical}.task-compose-sheet input:focus,.task-compose-sheet select:focus,.task-compose-sheet textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(241,90,41,.1)}.task-compose-row{display:grid;grid-template-columns:minmax(0,1fr) 105px;gap:10px}.task-compose-date-actions{display:flex;flex-wrap:wrap;align-items:center;gap:8px}.task-compose-date-control{display:flex;align-items:center;min-width:0}.task-compose-date-chip{position:relative;display:inline-flex!important;grid-template-columns:none!important;align-items:center;flex-direction:row!important;gap:7px!important;width:auto;min-height:40px;padding:0 12px;border:1px solid var(--line);border-radius:999px;background:#fffaf3;color:#776e62!important;font-size:13px!important;font-weight:700!important;overflow:hidden;cursor:pointer}.task-compose-date-chip.selected{border-color:#f3b18f;background:var(--accent-soft);color:#b7421e!important}.task-compose-date-chip svg{width:16px;height:16px;flex:none}.task-compose-native-picker{position:absolute;inset:0;opacity:0;cursor:pointer;padding:0!important;border:0!important}.task-compose-date-clear{display:grid;place-items:center;width:34px;height:34px;margin-left:2px;border:0;border-radius:50%;background:transparent;color:var(--muted)}.task-compose-date-clear:hover{background:#f5eee5;color:var(--text)}.task-compose-date-clear svg{width:15px;height:15px}.task-compose-time-add{min-width:0;height:40px;padding:0 13px;border:1px dashed #e5b89d;border-radius:999px;background:transparent;color:var(--accent);font-weight:700}.task-compose-time-add:hover{border-color:var(--accent);background:#fff4e8}.task-compose-time-chip{display:inline-flex!important;grid-template-columns:none!important;align-items:center;flex-direction:row!important;gap:5px!important;width:auto;color:var(--muted)!important;font-size:12px!important}.task-compose-time-chip input{width:102px!important;min-width:0;padding:9px 8px!important;border-radius:999px!important}.task-compose-time-remove{display:grid;place-items:center;flex:0 0 34px;width:34px;height:34px;border:0;border-radius:50%;background:transparent;color:var(--muted)}.task-compose-time-remove:hover{background:#f5eee5;color:var(--text)}.task-compose-time-remove svg{width:15px;height:15px}.task-compose-sheet footer{display:flex;justify-content:flex-end;gap:9px;padding-top:4px}.task-compose-sheet button:disabled{opacity:.45}.task-compose-enter-active,.task-compose-leave-active{transition:background .22s ease}.task-compose-enter-active .task-compose-sheet,.task-compose-leave-active .task-compose-sheet{transition:transform .28s cubic-bezier(.2,.9,.25,1.08),opacity .2s ease}.task-compose-enter-from,.task-compose-leave-to{background:rgba(45,38,31,0)}.task-compose-enter-from .task-compose-sheet,.task-compose-leave-to .task-compose-sheet{transform:translateY(36px) scale(.86);opacity:0}
 .countdown-compose-enter-active,.countdown-compose-leave-active{transition:background .24s ease}.countdown-compose-enter-active .countdown-modal,.countdown-compose-leave-active .countdown-modal{transition:transform .34s cubic-bezier(.18,.9,.28,1.16),opacity .22s ease,filter .22s ease;transform-origin:var(--fab-origin-x,calc(100% - 43px)) var(--fab-origin-y,calc(100% - 104px))}.countdown-compose-enter-from,.countdown-compose-leave-to{background:rgba(45,38,31,0)}.countdown-compose-enter-from .countdown-modal,.countdown-compose-leave-to .countdown-modal{transform:translate(20px,28px) scale(.18) rotate(8deg);opacity:0;filter:blur(5px)}@media(max-width:930px){.unified-fab{bottom:calc(82px + env(safe-area-inset-bottom))}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}}
 .overdue-section{margin-top:18px}.overdue-heading{color:var(--danger);margin-bottom:6px}.overdue-heading span{min-width:22px;height:22px;padding:0 7px;display:inline-grid;place-items:center;border-radius:999px;background:#fde2dc;color:var(--danger);font-size:11px}.overdue-list{margin-bottom:18px}.overdue-task{background:#fff8f6}.overdue-task .meta,.overdue-badge{color:var(--danger)}.overdue-badge{font-size:11px;font-weight:700;background:#fde2dc;border-radius:999px;padding:4px 8px}.pager{display:flex;align-items:center;justify-content:flex-end;gap:10px;margin:0 0 14px}.pager button:disabled{opacity:.4;cursor:not-allowed}.pager span{color:var(--muted);font-size:13px}.section-heading{display:flex;align-items:center;gap:7px;margin:16px 0 10px;font-size:16px;line-height:1.35;color:#514a40}.section-heading svg{width:17px;height:17px;color:var(--accent)}.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}.more-settings{border:1px solid var(--line);border-radius:10px;background:#fff}.more-settings summary{cursor:pointer;padding:11px 13px;color:#756d61;font-size:12px;font-weight:700}.more-settings-body{display:grid;gap:12px;padding:0 13px 13px}.more-settings-body>label{display:grid;grid-template-columns:80px 1fr;align-items:center;gap:7px;color:#756d61;font-size:12px;font-weight:650}.modal-mask{position:fixed;inset:0;z-index:80;background:rgba(45,38,31,.4);display:grid;place-items:center;padding:24px}.modal-box{width:min(360px,92vw);background:#fffdf8;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:22px;display:grid;gap:14px}.modal-box h3{margin:0;font-size:17px}.modal-box label{display:grid;gap:7px;font-size:12px;font-weight:650;color:#756d61}.modal-input{width:100%;border:1px solid var(--line);background:#fff;padding:11px;border-radius:9px;outline:none;font-size:16px}.modal-actions{display:flex;justify-content:flex-end;gap:8px}.countdown-view{display:grid;gap:16px;padding-bottom:36px}.countdown-content{display:grid;gap:16px}.countdown-hero{display:flex;align-items:end;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:10px}.countdown-hero small{display:block;color:var(--muted);font-size:12px}.countdown-layout{display:grid;gap:22px;align-items:start}.countdown-timeline{display:grid;gap:20px;max-width:820px;width:100%;margin:0 auto}.countdown-group{display:grid;gap:2px}.countdown-group>h3{margin:0 0 7px;padding-left:12px;color:#8a8175;font-size:11px;font-weight:750;letter-spacing:.08em}.countdown-row{--countdown-tone:#d9a17c;position:relative;width:100%;min-height:66px;display:grid;grid-template-columns:minmax(0,1fr) 86px;align-items:center;gap:14px;border:0;border-bottom:1px solid var(--line);border-radius:0;background:transparent;padding:9px 10px 9px 17px;text-align:left;color:inherit;transition:background .15s ease,transform .15s ease}.countdown-row:before{content:'';position:absolute;left:3px;top:50%;width:4px;height:4px;border-radius:50%;background:var(--countdown-tone);transform:translateY(-50%)}.countdown-row:first-of-type{border-top:1px solid var(--line)}.countdown-row:hover{background:#fffaf3}.countdown-row:active{transform:scale(.995)}.countdown-row.kind-anniversary{--countdown-tone:#b69b7d}.countdown-row.kind-birthday{--countdown-tone:#9cab8d}.countdown-row.today{--countdown-tone:#71856b}.countdown-row.past{--countdown-tone:#aaa094;opacity:.66}.countdown-row .pinned-icon{position:absolute;right:4px;top:5px}.countdown-icon{width:38px;height:38px;border-radius:12px;background:#fff2e8;display:grid;place-items:center;font-size:19px}.countdown-main{min-width:0;display:grid;gap:4px}.countdown-main>b{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:15px;color:#3f3932}.countdown-main>small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--muted);font-size:11px}.countdown-badges{display:flex;gap:5px}.countdown-badges em{font-style:normal;color:#8a7f72;font-size:10px}.countdown-badges em+em:before{content:'·';margin-right:5px;color:#c1b7aa}.countdown-state{display:grid;justify-items:end;gap:3px}.countdown-state strong{font-variant-numeric:tabular-nums;font-size:26px;line-height:1;color:#62594e}.countdown-state small{color:var(--muted);font-size:10px}.countdown-row.today .countdown-state strong,.countdown-row.today .countdown-state small{color:#71856b}.countdown-row.past .countdown-state strong{color:#887d70}.countdown-focus{--countdown-tone:#d9a17c;width:min(720px,100%);min-height:255px;margin:0 auto;display:grid;place-content:center;justify-items:center;gap:7px;border:1px solid color-mix(in srgb,var(--countdown-tone) 34%,var(--line));border-radius:16px;background:color-mix(in srgb,var(--countdown-tone) 7%,#fffdf8);padding:28px 24px;text-align:center;color:inherit;box-shadow:none;transition:border-color .15s ease,background .15s ease}.countdown-focus:hover{border-color:color-mix(in srgb,var(--countdown-tone) 54%,var(--line));background:color-mix(in srgb,var(--countdown-tone) 10%,#fffdf8)}.countdown-focus.kind-anniversary{--countdown-tone:#b69b7d}.countdown-focus.kind-birthday{--countdown-tone:#9cab8d}.countdown-focus>small{color:#8b8276;font-size:10px;font-weight:750;letter-spacing:.1em}.countdown-focus h3{margin:7px 0 0;font-size:20px;font-weight:680}.countdown-focus p{margin:1px 0 0;color:var(--muted);font-size:11px}.countdown-number{display:flex;align-items:end;gap:6px;margin:4px 0 3px}.countdown-number strong{font-variant-numeric:tabular-nums;font-size:76px;line-height:.9;font-weight:720;letter-spacing:-.05em;color:#3f3932}.countdown-number span{font-size:13px;color:#7a7165;padding-bottom:6px}.countdown-copy{font-size:12px;color:#71685e;font-weight:650}.countdown-empty{min-height:260px;background:#fffdf8;border:1px dashed var(--line);border-radius:16px;padding:26px;color:#766d60;text-align:center;display:grid;gap:9px;place-content:center;justify-items:center}.countdown-empty svg{color:var(--accent);width:30px;height:30px}.countdown-empty span{font-size:12px}.countdown-empty button{margin-top:5px}.archived-toggle,.archived-countdowns button{display:inline-flex;align-items:center;gap:5px;border:1px solid var(--line);background:#fff;border-radius:10px;padding:8px 11px;font-size:12px}.archived-toggle{justify-self:start}.archived-countdowns{display:grid;gap:10px}.archived-countdowns article{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px 14px}.archived-countdowns article b{flex:1}.archived-countdowns article small{color:var(--muted)}.countdown-detail-mask,.countdown-modal-mask{position:fixed;inset:0;background:rgba(45,38,31,.36);display:grid;padding:20px}.countdown-detail-mask{z-index:85;place-items:end center}.countdown-detail-sheet{width:min(500px,100%);background:#fffdf8;border:1px solid var(--line);border-radius:20px;box-shadow:0 12px 36px rgba(56,40,24,.18);padding:18px;display:grid;gap:16px}.countdown-detail-sheet header{display:grid;grid-template-columns:42px 1fr 44px;align-items:center;gap:10px}.countdown-detail-sheet header small{color:var(--muted);font-size:11px}.countdown-detail-sheet header h3{margin:2px 0 0;font-size:19px}.countdown-detail-sheet header button{min-width:44px;min-height:44px;border:0;background:transparent;color:#766d60;border-radius:8px;width:44px;height:44px;display:grid;place-items:center}.countdown-modal header button{min-width:44px;min-height:44px;border:0;background:transparent;color:#766d60;border-radius:8px;width:44px;height:44px;display:grid;place-items:center}.countdown-detail-days{display:flex;align-items:baseline;gap:6px;padding:8px 0}.countdown-detail-days strong{font-variant-numeric:tabular-nums;font-size:46px;line-height:1}.countdown-detail-days span{color:var(--muted)}.countdown-detail-days b{margin-left:auto;color:var(--accent);font-size:13px}.countdown-detail-sheet dl{margin:0;display:grid;gap:1px;background:var(--line)}.countdown-detail-sheet dl div{display:grid;grid-template-columns:62px 1fr;gap:10px;background:#fffdf8;padding:10px 0}.countdown-detail-sheet dt{color:var(--muted);font-size:12px}.countdown-detail-sheet dd{margin:0;font-size:13px}.countdown-detail-sheet footer{display:flex;justify-content:flex-end;gap:8px}.countdown-detail-sheet footer button{min-height:44px;display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px 13px}.countdown-modal-mask{z-index:90;place-items:center}.countdown-modal{width:min(420px,96vw);background:#fffdf8;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:18px;display:grid;gap:12px}.countdown-modal header{display:flex;justify-content:space-between;align-items:start}.countdown-modal header small{color:var(--muted)}.countdown-modal header h3{margin:2px 0 0}.countdown-modal label{display:grid;gap:6px;color:#675f54;font-size:12px;font-weight:650}.countdown-modal input,.countdown-modal select{border:1px solid var(--line);background:#fff;border-radius:10px;padding:11px 12px;outline:none}.countdown-modal input:focus,.countdown-modal select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(241,90,41,.1)}.countdown-title-fields{display:grid;grid-template-columns:72px 1fr;gap:8px}.countdown-modal footer{display:flex;justify-content:flex-end;gap:8px;padding-top:6px}.countdown-advanced{border:1px solid var(--line);border-radius:11px;background:#fffaf4}.countdown-advanced summary{min-height:44px;display:flex;align-items:center;justify-content:space-between;padding:0 12px;cursor:pointer;color:#756d61;font-size:12px;font-weight:700;list-style:none}.countdown-advanced summary::-webkit-details-marker{display:none}.countdown-advanced summary svg{width:16px;height:16px;transition:transform .16s ease}.countdown-advanced[open] summary svg{transform:rotate(180deg)}.countdown-advanced>label,.countdown-advanced>.countdown-title-fields{margin:0 12px 12px}.countdown-detail-enter-active,.countdown-detail-leave-active{transition:background .2s ease}.countdown-detail-enter-active .countdown-detail-sheet,.countdown-detail-leave-active .countdown-detail-sheet{transition:transform .24s ease,opacity .2s ease}.countdown-detail-enter-from .countdown-detail-sheet,.countdown-detail-leave-to .countdown-detail-sheet{transform:translateY(100%);opacity:.6}@media(max-width:930px){.countdown-layout{grid-template-columns:1fr;gap:16px}.countdown-focus{display:grid;min-height:205px;padding:22px 16px}.countdown-number strong{font-size:64px}.countdown-timeline{gap:16px}}@media(max-width:800px){.countdown-hero{align-items:center}.countdown-hero h2{font-size:19px}.countdown-row{grid-template-columns:minmax(0,1fr) 72px;padding:9px 4px;gap:9px}.countdown-state strong{font-size:25px}.countdown-detail-mask,.countdown-modal-mask{place-items:end;padding:0}.countdown-detail-sheet,.countdown-modal{width:100%;border-radius:22px 22px 0 0;padding:18px 16px calc(18px + env(safe-area-inset-bottom));max-height:min(88dvh,760px);overflow:auto}.countdown-view{position:relative}}
 @media(max-width:930px){.countdown-row,.countdown-row:first-of-type{min-height:62px;grid-template-columns:minmax(0,1fr) 72px;gap:8px;padding:8px 9px 8px 17px;background:transparent;border:0;border-bottom:1px solid var(--line);border-radius:0;box-shadow:none}.countdown-row:first-of-type{border-top:1px solid var(--line)}.countdown-row.pinned,.countdown-row.today{background:transparent}.countdown-state strong{font-size:24px}}
diff --git a/frontend/src/style.test.ts b/frontend/src/style.test.ts
index 469f035..71c144e 100644
--- a/frontend/src/style.test.ts
+++ b/frontend/src/style.test.ts
@@ -30,6 +30,30 @@ describe('mobile navigation styles', () => {
   })
 })
 
+describe('mobile sheet contract', () => {
+  it('uses shared roles for details, creation and secondary actions', () => {
+    expect(app).toContain('class="task-compose-mask app-sheet-mask"')
+    expect(app).toContain('class="task-compose-sheet app-sheet app-sheet--create"')
+    expect(app).toContain('class="more-sheet app-sheet app-sheet--actions"')
+    expect(mvpPanel).toContain('class="task-compose-sheet habit-compose-sheet app-sheet app-sheet--create"')
+    expect(mvpPanel).toContain('class="habit-detail-sheet app-sheet app-sheet--detail"')
+    expect(countdownPanel).toContain('class="countdown-detail-sheet app-sheet app-sheet--detail"')
+    expect(countdownPanel).toContain('class="countdown-modal app-sheet app-sheet--create"')
+    expect(css).toContain('--sheet-radius:20px;--sheet-scrim:rgba(45,38,31,.4)')
+    expect(css).toContain('.app-sheet-mask.app-sheet-mask{background:var(--sheet-scrim)')
+    expect(css).toContain('.app-sheet__header{min-height:64px;')
+    expect(css).toContain('.app-sheet__body{min-height:0;overflow-y:auto;')
+    expect(css).toContain('.app-sheet__footer{position:sticky;bottom:0;')
+    expect(css).toContain('padding-bottom:calc(16px + env(safe-area-inset-bottom))')
+  })
+
+  it('keeps destructive actions in a separate bottom danger zone', () => {
+    expect(mvpPanel).toContain('class="app-sheet__danger"')
+    expect(mvpPanel).toMatch(/app-sheet__danger[\s\S]*?deleteHabit\(selectedHabit\)/)
+    expect(css).toContain('.app-sheet__danger{border-top:1px solid #f1d4cd;')
+  })
+})
+
 describe('mobile list row language', () => {
   it('uses one quiet bordered row surface for tasks, habits, and countdowns on mobile', () => {
     expect(css).toContain('@media(max-width:930px){.task-row,.habit-row,.countdown-row{')
@@ -45,8 +69,8 @@ describe('mobile list row language', () => {
 
   it('keeps destructive habit actions in a detail sheet instead of the list row', () => {
     expect(mvpPanel).not.toContain('<button class="icon ghost" aria-label="归档习惯"')
-    expect(mvpPanel).toContain('class="habit-detail-mask"')
-    expect(mvpPanel).toContain('class="habit-detail-sheet"')
+    expect(mvpPanel).toContain('class="habit-detail-mask app-sheet-mask"')
+    expect(mvpPanel).toContain('class="habit-detail-sheet app-sheet app-sheet--detail"')
     expect(mvpPanel).toContain('@click="archiveHabit(selectedHabit)"')
     expect(mvpPanel).toContain('@click="deleteHabit(selectedHabit)"')
     expect(mvpPanel).toContain('永久删除')