diff --git a/packages/client/src/components/global/MkPageHeader.vue b/packages/client/src/components/global/MkPageHeader.vue
index 464a965b33..5eaa5e4fee 100644
--- a/packages/client/src/components/global/MkPageHeader.vue
+++ b/packages/client/src/components/global/MkPageHeader.vue
@@ -1,35 +1,35 @@
 <template>
-<div v-if="show" ref="el" class="fdidabkb" :class="{ slim: narrow, thin: thin_ }" :style="{ background: bg }" @click="onClick">
-	<div v-if="narrow" class="buttons left" @click="openAccountMenu">
+	<div v-if="show" ref="el" class="fdidabkb" :class="{ slim: narrow, thin: thin_ }" :style="{ background: bg }" @click="onClick">
+		<div v-if="narrow" class="buttons left" @click="openAccountMenu">
 		<MkAvatar v-if="props.displayMyAvatar && $i" class="avatar" :user="$i" :disable-preview="true"/>
 	</div>
 	<template v-if="metadata">
 		<div v-if="!hideTitle" class="titleContainer" @click="showTabsPopup">
 			<MkAvatar v-if="metadata.avatar" class="avatar" :user="metadata.avatar" :disable-preview="true" :show-indicator="true"/>
-			<i v-else-if="metadata.icon && !narrow" class="icon" :class="metadata.icon"></i>
+				<i v-else-if="metadata.icon && !narrow" class="icon" :class="metadata.icon"></i>
 
-			<div class="title">
-				<MkUserName v-if="metadata.userName" :user="metadata.userName" :nowrap="true" class="title"/>
-				<div v-else-if="metadata.title && !(tabs != null && tabs.length > 0 && narrow)" class="title">{{ metadata.title }}</div>
-				<div v-if="!narrow && metadata.subtitle" class="subtitle">
-					{{ metadata.subtitle }}
+				<div class="title">
+					<MkUserName v-if="metadata.userName" :user="metadata.userName" :nowrap="true" class="title"/>
+					<div v-else-if="metadata.title && !(tabs != null && tabs.length > 0 && narrow)" class="title">{{ metadata.title }}</div>
+					<div v-if="!narrow && metadata.subtitle" class="subtitle">
+						{{ metadata.subtitle }}
+					</div>
 				</div>
 			</div>
-		</div>
-		<div ref="tabsEl" v-if="hasTabs" class="tabs">
-			<button v-for="tab in tabs" :ref="(el) => tabRefs[tab.key] = el" v-tooltip.noDelay="tab.title" class="tab _button" :class="{ active: tab.key != null && tab.key === props.tab }" @mousedown="(ev) => onTabMousedown(tab, ev)" @click="(ev) => onTabClick(tab, ev)">
-				<i v-if="tab.icon" class="icon" :class="tab.icon"></i>
-				<span v-if="deviceKind !== 'desktop' || isTouchUsing || (!tab.iconOnly && !narrow)" class="title">{{ tab.title }}</span>
-			</button>
-			<div ref="tabHighlightEl" class="highlight"></div>
-		</div>
-	</template>
-	<div class="buttons right">
-		<template v-for="action in actions">
-			<button v-tooltip.noDelay="action.text" class="_button button" :class="{ highlighted: action.highlighted }" @click.stop="action.handler" @touchstart="preventDrag"><i :class="action.icon"></i></button>
+			<div ref="tabsEl" v-if="hasTabs" class="tabs">
+				<button v-for="tab in tabs" :ref="(el) => tabRefs[tab.key] = el" v-tooltip.noDelay="tab.title" class="tab _button" :class="{ active: tab.key != null && tab.key === props.tab }" @mousedown="(ev) => onTabMousedown(tab, ev)" @click="(ev) => onTabClick(tab, ev)">
+					<i v-if="tab.icon" class="icon" :class="tab.icon"></i>
+					<span class="title">{{ tab.title }}</span>
+				</button>
+				<div ref="tabHighlightEl" class="highlight"></div>
+			</div>
 		</template>
+		<div class="buttons right">
+			<template v-for="action in actions">
+				<button v-tooltip.noDelay="action.text" class="_button button" :class="{ highlighted: action.highlighted }" @click.stop="action.handler" @touchstart="preventDrag"><i :class="action.icon"></i></button>
+			</template>
+		</div>
 	</div>
-</div>
 </template>
 
 <script lang="ts" setup>
@@ -37,10 +37,7 @@ import { computed, onMounted, onUnmounted, ref, inject, watch, shallowReactive,
 import tinycolor from 'tinycolor2';
 import { popupMenu } from '@/os';
 import { scrollToTop } from '@/scripts/scroll';
-import { i18n } from '@/i18n';
 import { globalEvents } from '@/events';
-import { deviceKind } from '@/scripts/device-kind';
-import { isTouchUsing } from '@/scripts/touch';
 import { injectPageMetadata } from '@/scripts/page-metadata';
 import { $i, openAccountMenu as openAccountMenu_ } from '@/account';
 
@@ -153,12 +150,18 @@ onMounted(() => {
 			if (tabEl && tabHighlightEl) {
 				// offsetWidth や offsetLeft は少数を丸めてしまうため getBoundingClientRect を使う必要がある
 				// https://developer.mozilla.org/ja/docs/Web/API/HTMLElement/offsetWidth#%E5%80%A4
-				const parentRect = tabsEl.getBoundingClientRect();
-				const rect = tabEl.getBoundingClientRect();
-				const left = (rect.left - parentRect.left + tabsEl?.scrollLeft);
-				tabHighlightEl.style.width = rect.width + 'px';
-				tabHighlightEl.style.left = left + 'px';
-				tabsEl.scrollTo({left: left - 80, behavior: "smooth"});
+				const tabSizeX = tabEl.scrollWidth + 20; // + the tab's padding
+				tabEl.style = `--width: ${tabSizeX}px`;
+				setTimeout(() => {
+					const parentRect = tabsEl.getBoundingClientRect();
+					const rect = tabEl.getBoundingClientRect();
+					const left = (rect.left - parentRect.left + tabsEl?.scrollLeft);
+					tabHighlightEl.style.width = tabSizeX + 'px';
+					tabHighlightEl.style.transform = `translateX(${left}px)`;
+					window.requestAnimationFrame(() => {
+						tabsEl?.scrollTo({left: left - 60, behavior: "smooth"});
+					})
+				}, 200);
 			}
 		});
 	}, {
@@ -190,7 +193,6 @@ onUnmounted(() => {
 	-webkit-backdrop-filter: var(--blur, blur(15px));
 	backdrop-filter: var(--blur, blur(15px));
 	border-bottom: solid 0.5px var(--divider);
-	contain: strict;
 	height: var(--height);
 
 	&.thin {
@@ -235,7 +237,7 @@ onUnmounted(() => {
 	> .buttons {
 		--margin: 8px;
 		display: flex;
-    align-items: center;
+		align-items: center;
 		height: var(--height);
 		margin: 0 var(--margin);
 
@@ -349,16 +351,20 @@ onUnmounted(() => {
 		font-size: 1em;
 		overflow-x: auto;
 		white-space: nowrap;
+		contain: strict;
 
 		> .tab {
 			display: inline-flex;
 			align-items: center;
 			position: relative;
-			padding: 0 10px;
+			border-inline: 10px solid transparent;
 			height: 100%;
 			font-weight: normal;
 			opacity: 0.7;
-			transition: color .2s, opacity .2s;
+			width: 38px;
+			--width: 38px;
+			overflow: hidden;
+			transition: color .2s, opacity .2s, width .2s;
 
 			&:hover {
 				opacity: 1;
@@ -368,20 +374,29 @@ onUnmounted(() => {
 				opacity: 1;
 				color: var(--accent);
 				font-weight: 600;
+				width: var(--width);
+			}
+			&:not(.active) > .title {
+				opacity: 0;
 			}
 
 			> .icon + .title {
 				margin-left: 8px;
 			}
+			> .title {
+				transition: opacity .2s;
+			}
 		}
 
 		> .highlight {
 			position: absolute;
 			bottom: 0;
+			left: 0;
 			height: 3px;
 			background: var(--accent);
 			border-radius: 999px;
-			transition: all 0.2s ease;
+			transition: width .2s, transform .2s;
+			transition-timing-function: cubic-bezier(0,0,0,1.2);
 			pointer-events: none;
 		}
 	}