diff --git a/packages/client/src/components/emoji-picker.section.vue b/packages/client/src/components/emoji-picker.section.vue
index 52f704748..e2a80d546 100644
--- a/packages/client/src/components/emoji-picker.section.vue
+++ b/packages/client/src/components/emoji-picker.section.vue
@@ -1,15 +1,17 @@
 <template>
+<!-- このコンポーネントの要素のclassは親から利用されるのでむやみに弄らないこと -->
 <section>
 	<header class="_acrylic" @click="shown = !shown">
 		<i class="toggle fa-fw" :class="shown ? 'fas fa-chevron-down' : 'fas fa-chevron-up'"></i> <slot></slot> ({{ emojis.length }})
 	</header>
-	<div v-if="shown">
-		<button v-for="emoji in emojis"
+	<div v-if="shown" class="body">
+		<button
+			v-for="emoji in emojis"
 			:key="emoji"
-			class="_button"
+			class="_button item"
 			@click="emit('chosen', emoji, $event)"
 		>
-			<MkEmoji :emoji="emoji" :normal="true"/>
+			<MkEmoji class="emoji" :emoji="emoji" :normal="true"/>
 		</button>
 	</div>
 </section>
diff --git a/packages/client/src/components/emoji-picker.vue b/packages/client/src/components/emoji-picker.vue
index 64732e703..2f974cbda 100644
--- a/packages/client/src/components/emoji-picker.vue
+++ b/packages/client/src/components/emoji-picker.vue
@@ -3,63 +3,67 @@
 	<input ref="search" v-model.trim="q" class="search" data-prevent-emoji-insert :class="{ filled: q != null && q != '' }" :placeholder="i18n.ts.search" type="search" @paste.stop="paste" @keyup.enter="done()">
 	<div ref="emojis" class="emojis">
 		<section class="result">
-			<div v-if="searchResultCustom.length > 0">
-				<button v-for="emoji in searchResultCustom"
+			<div v-if="searchResultCustom.length > 0" class="body">
+				<button
+					v-for="emoji in searchResultCustom"
 					:key="emoji.id"
-					class="_button"
+					class="_button item"
 					:title="emoji.name"
 					tabindex="0"
 					@click="chosen(emoji, $event)"
 				>
 					<!--<MkEmoji v-if="emoji.char != null" :emoji="emoji.char"/>-->
-					<img :src="disableShowingAnimatedImages ? getStaticImageUrl(emoji.url) : emoji.url"/>
+					<img class="emoji" :src="disableShowingAnimatedImages ? getStaticImageUrl(emoji.url) : emoji.url"/>
 				</button>
 			</div>
-			<div v-if="searchResultUnicode.length > 0">
-				<button v-for="emoji in searchResultUnicode"
+			<div v-if="searchResultUnicode.length > 0" class="body">
+				<button
+					v-for="emoji in searchResultUnicode"
 					:key="emoji.name"
-					class="_button"
+					class="_button item"
 					:title="emoji.name"
 					tabindex="0"
 					@click="chosen(emoji, $event)"
 				>
-					<MkEmoji :emoji="emoji.char"/>
+					<MkEmoji class="emoji" :emoji="emoji.char"/>
 				</button>
 			</div>
 		</section>
 
-		<div v-if="tab === 'index'" class="index">
+		<div v-if="tab === 'index'" class="group index">
 			<section v-if="showPinned">
-				<div>
-					<button v-for="emoji in pinned"
+				<div class="body">
+					<button
+						v-for="emoji in pinned"
 						:key="emoji"
-						class="_button"
+						class="_button item"
 						tabindex="0"
 						@click="chosen(emoji, $event)"
 					>
-						<MkEmoji :emoji="emoji" :normal="true"/>
+						<MkEmoji class="emoji" :emoji="emoji" :normal="true"/>
 					</button>
 				</div>
 			</section>
 
 			<section>
 				<header class="_acrylic"><i class="far fa-clock fa-fw"></i> {{ i18n.ts.recentUsed }}</header>
-				<div>
-					<button v-for="emoji in recentlyUsedEmojis"
+				<div class="body">
+					<button
+						v-for="emoji in recentlyUsedEmojis"
 						:key="emoji"
-						class="_button"
+						class="_button item"
 						@click="chosen(emoji, $event)"
 					>
-						<MkEmoji :emoji="emoji" :normal="true"/>
+						<MkEmoji class="emoji" :emoji="emoji" :normal="true"/>
 					</button>
 				</div>
 			</section>
 		</div>
-		<div>
+		<div class="group">
 			<header class="_acrylic">{{ i18n.ts.customEmojis }}</header>
 			<XSection v-for="category in customEmojiCategories" :key="'custom:' + category" :initial-shown="false" :emojis="customEmojis.filter(e => e.category === category).map(e => ':' + e.name + ':')" @chosen="chosen">{{ category || i18n.ts.other }}</XSection>
 		</div>
-		<div>
+		<div class="group">
 			<header class="_acrylic">{{ i18n.ts.emoji }}</header>
 			<XSection v-for="category in categories" :key="category" :emojis="emojilist.filter(e => e.category === category).map(e => e.char)" @chosen="chosen">{{ category }}</XSection>
 		</div>
@@ -76,6 +80,7 @@
 <script lang="ts" setup>
 import { ref, computed, watch, onMounted } from 'vue';
 import * as Misskey from 'misskey-js';
+import XSection from './emoji-picker.section.vue';
 import { emojilist, UnicodeEmojiDef, unicodeEmojiCategories as categories } from '@/scripts/emojilist';
 import { getStaticImageUrl } from '@/scripts/get-static-image-url';
 import Ripple from '@/components/ripple.vue';
@@ -83,7 +88,6 @@ import * as os from '@/os';
 import { isTouchUsing } from '@/scripts/touch';
 import { deviceKind } from '@/scripts/device-kind';
 import { emojiCategories, instance } from '@/instance';
-import XSection from './emoji-picker.section.vue';
 import { i18n } from '@/i18n';
 import { defaultStore } from '@/store';
 
@@ -266,7 +270,7 @@ watch(q, () => {
 function focus() {
 	if (!['smartphone', 'tablet'].includes(deviceKind) && !isTouchUsing) {
 		search.value?.focus({
-			preventScroll: true
+			preventScroll: true,
 		});
 	}
 }
@@ -415,19 +419,16 @@ defineExpose({
 					font-size: 15px;
 				}
 
-				> div {
+				> .body {
 					display: grid;
 					grid-template-columns: var(--columns);
+					font-size: 30px;
 
-					> button {
+					> .item {
 						aspect-ratio: 1 / 1;
 						width: auto;
 						height: auto;
 						min-width: 0;
-
-						> * {
-							font-size: 30px;
-						}
 					}
 				}
 			}
@@ -478,7 +479,7 @@ defineExpose({
 			display: none;
 		}
 
-		> div {
+		> .group {
 			&:not(.index) {
 				padding: 4px 0 8px 0;
 				border-top: solid 0.5px var(--divider);
@@ -513,16 +514,18 @@ defineExpose({
 				}
 			}
 
-			> div {
+			> .body {
 				position: relative;
 				padding: $pad;
 
-				> button {
+				> .item {
 					position: relative;
 					padding: 0;
 					width: var(--eachSize);
 					height: var(--eachSize);
+					contain: strict;
 					border-radius: 4px;
+					font-size: 24px;
 
 					&:focus-visible {
 						outline: solid 2px var(--focus);
@@ -538,8 +541,7 @@ defineExpose({
 						box-shadow: inset 0 0.15em 0.3em rgba(27, 31, 35, 0.15);
 					}
 
-					> * {
-						font-size: 24px;
+					> .emoji {
 						height: 1.25em;
 						vertical-align: -.25em;
 						pointer-events: none;
diff --git a/packages/client/src/components/media-image.vue b/packages/client/src/components/media-image.vue
index 43639f677..9d417bd99 100644
--- a/packages/client/src/components/media-image.vue
+++ b/packages/client/src/components/media-image.vue
@@ -2,9 +2,9 @@
 <div v-if="hide" class="qjewsnkg" @click="hide = false">
 	<ImgWithBlurhash class="bg" :hash="image.blurhash" :title="image.comment" :alt="image.comment"/>
 	<div class="text">
-		<div>
-			<b><i class="fas fa-exclamation-triangle"></i> {{ $ts.sensitive }}</b>
-			<span>{{ $ts.clickToShow }}</span>
+		<div class="wrapper">
+			<b style="display: block;"><i class="fas fa-exclamation-triangle"></i> {{ $ts.sensitive }}</b>
+			<span style="display: block;">{{ $ts.clickToShow }}</span>
 		</div>
 	</div>
 </div>
@@ -37,8 +37,8 @@ let hide = $ref(true);
 const url = (props.raw || defaultStore.state.loadRawImages)
 	? props.image.url
 	: defaultStore.state.disableShowingAnimatedImages
-			? getStaticImageUrl(props.image.thumbnailUrl)
-			: props.image.thumbnailUrl;
+		? getStaticImageUrl(props.image.thumbnailUrl)
+		: props.image.thumbnailUrl;
 
 // Plugin:register_note_view_interruptor を使って書き換えられる可能性があるためwatchする
 watch(() => props.image, () => {
@@ -68,15 +68,11 @@ watch(() => props.image, () => {
 		justify-content: center;
 		align-items: center;
 
-		> div {
+		> .wrapper {
 			display: table-cell;
 			text-align: center;
 			font-size: 0.8em;
 			color: #fff;
-
-			> * {
-				display: block;
-			}
 		}
 	}
 }
diff --git a/packages/client/src/components/post-form-attaches.vue b/packages/client/src/components/post-form-attaches.vue
index 6b9827407..98bf2df09 100644
--- a/packages/client/src/components/post-form-attaches.vue
+++ b/packages/client/src/components/post-form-attaches.vue
@@ -2,7 +2,7 @@
 <div v-show="files.length != 0" class="skeikyzd">
 	<XDraggable v-model="_files" class="files" item-key="id" animation="150" delay="100" delay-on-touch-only="true">
 		<template #item="{element}">
-			<div @click="showFileMenu(element, $event)" @contextmenu.prevent="showFileMenu(element, $event)">
+			<div class="file" @click="showFileMenu(element, $event)" @contextmenu.prevent="showFileMenu(element, $event)">
 				<MkDriveFileThumbnail :data-id="element.id" class="thumbnail" :file="element" fit="cover"/>
 				<div v-if="element.isSensitive" class="sensitive">
 					<i class="fas fa-exclamation-triangle icon"></i>
@@ -22,18 +22,18 @@ import * as os from '@/os';
 export default defineComponent({
 	components: {
 		XDraggable: defineAsyncComponent(() => import('vuedraggable').then(x => x.default)),
-		MkDriveFileThumbnail
+		MkDriveFileThumbnail,
 	},
 
 	props: {
 		files: {
 			type: Array,
-			required: true
+			required: true,
 		},
 		detachMediaFn: {
 			type: Function,
-			required: false
-		}
+			required: false,
+		},
 	},
 
 	emits: ['updated', 'detach', 'changeSensitive', 'changeName'],
@@ -51,8 +51,8 @@ export default defineComponent({
 			},
 			set(value) {
 				this.$emit('updated', value);
-			}
-		}
+			},
+		},
 	},
 
 	methods: {
@@ -66,7 +66,7 @@ export default defineComponent({
 		toggleSensitive(file) {
 			os.api('drive/files/update', {
 				fileId: file.id,
-				isSensitive: !file.isSensitive
+				isSensitive: !file.isSensitive,
 			}).then(() => {
 				this.$emit('changeSensitive', file, !file.isSensitive);
 			});
@@ -75,12 +75,12 @@ export default defineComponent({
 			const { canceled, result } = await os.inputText({
 				title: this.$ts.enterFileName,
 				default: file.name,
-				allowEmpty: false
+				allowEmpty: false,
 			});
 			if (canceled) return;
 			os.api('drive/files/update', {
 				fileId: file.id,
-				name: result
+				name: result,
 			}).then(() => {
 				this.$emit('changeName', file, result);
 				file.name = result;
@@ -88,13 +88,13 @@ export default defineComponent({
 		},
 
 		async describe(file) {
-			os.popup(defineAsyncComponent(() => import("@/components/media-caption.vue")), {
+			os.popup(defineAsyncComponent(() => import('@/components/media-caption.vue')), {
 				title: this.$ts.describeFile,
 				input: {
 					placeholder: this.$ts.inputNewDescription,
-					default: file.comment !== null ? file.comment : "",
+					default: file.comment !== null ? file.comment : '',
 				},
-				image: file
+				image: file,
 			}, {
 				done: result => {
 					if (!result || result.canceled) return;
@@ -105,7 +105,7 @@ export default defineComponent({
 					}).then(() => {
 						file.comment = comment;
 					});
-				}
+				},
 			}, 'closed');
 		},
 
@@ -114,22 +114,22 @@ export default defineComponent({
 			this.menu = os.popupMenu([{
 				text: this.$ts.renameFile,
 				icon: 'fas fa-i-cursor',
-				action: () => { this.rename(file); }
+				action: () => { this.rename(file); },
 			}, {
 				text: file.isSensitive ? this.$ts.unmarkAsSensitive : this.$ts.markAsSensitive,
 				icon: file.isSensitive ? 'fas fa-eye-slash' : 'fas fa-eye',
-				action: () => { this.toggleSensitive(file); }
+				action: () => { this.toggleSensitive(file); },
 			}, {
 				text: this.$ts.describeFile,
 				icon: 'fas fa-i-cursor',
-				action: () => { this.describe(file); }
+				action: () => { this.describe(file); },
 			}, {
 				text: this.$ts.attachCancel,
 				icon: 'fas fa-times-circle',
-				action: () => { this.detachMedia(file.id); }
+				action: () => { this.detachMedia(file.id); },
 			}], ev.currentTarget ?? ev.target).then(() => this.menu = null);
-		}
-	}
+		},
+	},
 });
 </script>
 
@@ -142,7 +142,7 @@ export default defineComponent({
 		display: flex;
 		flex-wrap: wrap;
 
-		> div {
+		> .file {
 			position: relative;
 			width: 64px;
 			height: 64px;
diff --git a/packages/client/src/components/post-form.vue b/packages/client/src/components/post-form.vue
index 0197313e0..77fcd79c1 100644
--- a/packages/client/src/components/post-form.vue
+++ b/packages/client/src/components/post-form.vue
@@ -1,5 +1,6 @@
 <template>
-<div v-size="{ max: [310, 500] }" class="gafaadew"
+<div
+	v-size="{ max: [310, 500] }" class="gafaadew"
 	:class="{ modal, _popup: modal }"
 	@dragover.stop="onDragover"
 	@dragenter="onDragenter"
@@ -11,7 +12,7 @@
 		<button v-click-anime v-tooltip="i18n.ts.switchAccount" class="account _button" @click="openAccountMenu">
 			<MkAvatar :user="postAccount ?? $i" class="avatar"/>
 		</button>
-		<div>
+		<div class="right">
 			<span class="text-count" :class="{ over: textLength > maxTextLength }">{{ maxTextLength - textLength }}</span>
 			<span v-if="localOnly" class="local-only"><i class="fas fa-biohazard"></i></span>
 			<button ref="visibilityButton" v-tooltip="i18n.ts.visibility" class="_button visibility" :disabled="channel != null" @click="setVisibility">
@@ -68,6 +69,8 @@ import * as misskey from 'misskey-js';
 import insertTextAtCursor from 'insert-text-at-cursor';
 import { length } from 'stringz';
 import { toASCII } from 'punycode/';
+import * as Acct from 'misskey-js/built/acct';
+import { throttle } from 'throttle-debounce';
 import XNoteSimple from './note-simple.vue';
 import XNotePreview from './note-preview.vue';
 import XPostFormAttaches from './post-form-attaches.vue';
@@ -75,14 +78,12 @@ import XPollEditor from './poll-editor.vue';
 import { host, url } from '@/config';
 import { erase, unique } from '@/scripts/array';
 import { extractMentions } from '@/scripts/extract-mentions';
-import * as Acct from 'misskey-js/built/acct';
 import { formatTimeString } from '@/scripts/format-time-string';
 import { Autocomplete } from '@/scripts/autocomplete';
 import * as os from '@/os';
 import { stream } from '@/stream';
 import { selectFiles } from '@/scripts/select-file';
 import { defaultStore, notePostInterruptors, postFormActions } from '@/store';
-import { throttle } from 'throttle-debounce';
 import MkInfo from '@/components/ui/info.vue';
 import { i18n } from '@/i18n';
 import { instance } from '@/instance';
@@ -181,7 +182,7 @@ const placeholder = $computed((): string => {
 			i18n.ts._postForm._placeholders.c,
 			i18n.ts._postForm._placeholders.d,
 			i18n.ts._postForm._placeholders.e,
-			i18n.ts._postForm._placeholders.f
+			i18n.ts._postForm._placeholders.f,
 		];
 		return xs[Math.floor(Math.random() * xs.length)];
 	}
@@ -238,10 +239,10 @@ if (props.reply && props.reply.text != null) {
 
 	for (const x of extractMentions(ast)) {
 		const mention = x.host ?
-											`@${x.username}@${toASCII(x.host)}` :
-											(otherHost == null || otherHost === host) ?
-												`@${x.username}` :
-												`@${x.username}@${toASCII(otherHost)}`;
+			`@${x.username}@${toASCII(x.host)}` :
+			(otherHost == null || otherHost === host) ?
+				`@${x.username}` :
+				`@${x.username}@${toASCII(otherHost)}`;
 
 		// 自分は除外
 		if ($i.username === x.username && (x.host == null || x.host === host)) continue;
@@ -263,7 +264,7 @@ if (props.reply && ['home', 'followers', 'specified'].includes(props.reply.visib
 	visibility = props.reply.visibility;
 	if (props.reply.visibility === 'specified') {
 		os.api('users/show', {
-			userIds: props.reply.visibleUserIds.filter(uid => uid !== $i.id && uid !== props.reply.userId)
+			userIds: props.reply.visibleUserIds.filter(uid => uid !== $i.id && uid !== props.reply.userId),
 		}).then(users => {
 			users.forEach(pushVisibleUser);
 		});
@@ -399,7 +400,7 @@ function setVisibility() {
 			if (defaultStore.state.rememberNoteVisibility) {
 				defaultStore.set('localOnly', localOnly);
 			}
-		}
+		},
 	}, 'closed');
 }
 
@@ -522,8 +523,8 @@ function saveDraft() {
 			visibility: visibility,
 			localOnly: localOnly,
 			files: files,
-			poll: poll
-		}
+			poll: poll,
+		},
 	};
 
 	localStorage.setItem('drafts', JSON.stringify(draftData));
@@ -612,11 +613,11 @@ function showActions(ev) {
 		text: action.title,
 		action: () => {
 			action.handler({
-				text: text
+				text: text,
 			}, (key, value) => {
 				if (key === 'text') { text = value; }
 			});
-		}
+		},
 	})), ev.currentTarget ?? ev.target);
 }
 
@@ -726,7 +727,7 @@ onMounted(() => {
 			}
 		}
 
-		> div {
+		> .right {
 			position: absolute;
 			top: 0;
 			right: 0;
@@ -924,7 +925,7 @@ onMounted(() => {
 				line-height: 50px;
 			}
 
-			> div {
+			> .right {
 				> .text-count {
 					line-height: 50px;
 				}