diff --git a/src/client/app/common/views/components/signin.vue b/src/client/app/common/views/components/signin.vue
index e02af8154..7025ecea3 100644
--- a/src/client/app/common/views/components/signin.vue
+++ b/src/client/app/common/views/components/signin.vue
@@ -1,16 +1,16 @@
 <template>
 <form class="mk-signin" :class="{ signing }" @submit.prevent="onSubmit">
 	<div class="avatar" :style="{ backgroundImage: user ? `url('${ user.avatarUrl }')` : null }" v-show="withAvatar"></div>
-	<ui-input v-model="username" type="text" pattern="^[a-zA-Z0-9_]+$" spellcheck="false" autofocus required @input="onUsernameChange">
+	<ui-input v-model="username" type="text" pattern="^[a-zA-Z0-9_]+$" spellcheck="false" autofocus required @input="onUsernameChange" styl="fill">
 		<span>%i18n:@username%</span>
 		<span slot="prefix">@</span>
 		<span slot="suffix">@{{ host }}</span>
 	</ui-input>
-	<ui-input v-model="password" type="password" required>
+	<ui-input v-model="password" type="password" required styl="fill">
 		<span>%i18n:@password%</span>
 		<span slot="prefix">%fa:lock%</span>
 	</ui-input>
-	<ui-input v-if="user && user.twoFactorEnabled" v-model="token" type="number" required/>
+	<ui-input v-if="user && user.twoFactorEnabled" v-model="token" type="number" required styl="fill"/>
 	<ui-button type="submit" :disabled="signing">{{ signing ? '%i18n:@signing-in%' : '%i18n:@signin%' }}</ui-button>
 	<p style="margin: 8px 0;">%i18n:@or% <a :href="`${apiUrl}/signin/twitter`">%i18n:@signin-with-twitter%</a></p>
 </form>
diff --git a/src/client/app/common/views/components/signup.vue b/src/client/app/common/views/components/signup.vue
index e55d7ee3e..b817ca729 100644
--- a/src/client/app/common/views/components/signup.vue
+++ b/src/client/app/common/views/components/signup.vue
@@ -1,12 +1,12 @@
 <template>
 <form class="mk-signup" @submit.prevent="onSubmit" :autocomplete="Math.random()">
 	<template v-if="meta">
-		<ui-input v-if="meta.disableRegistration" v-model="invitationCode" type="text" :autocomplete="Math.random()" spellcheck="false" required>
+		<ui-input v-if="meta.disableRegistration" v-model="invitationCode" type="text" :autocomplete="Math.random()" spellcheck="false" required styl="fill">
 			<span>%i18n:@invitation-code%</span>
 			<span slot="prefix">%fa:id-card-alt%</span>
 			<p slot="text" v-html="'%i18n:@invitation-info%'.replace('{}', meta.maintainer.url)"></p>
 		</ui-input>
-		<ui-input v-model="username" type="text" pattern="^[a-zA-Z0-9_]{1,20}$" :autocomplete="Math.random()" spellcheck="false" required @input="onChangeUsername">
+		<ui-input v-model="username" type="text" pattern="^[a-zA-Z0-9_]{1,20}$" :autocomplete="Math.random()" spellcheck="false" required @input="onChangeUsername" styl="fill">
 			<span>%i18n:@username%</span>
 			<span slot="prefix">@</span>
 			<span slot="suffix">@{{ host }}</span>
@@ -18,7 +18,7 @@
 			<p slot="text" v-if="usernameState == 'min-range'" style="color:#FF1161">%fa:exclamation-triangle .fw% %i18n:@too-short%</p>
 			<p slot="text" v-if="usernameState == 'max-range'" style="color:#FF1161">%fa:exclamation-triangle .fw% %i18n:@too-long%</p>
 		</ui-input>
-		<ui-input v-model="password" type="password" :autocomplete="Math.random()" required @input="onChangePassword" :with-password-meter="true">
+		<ui-input v-model="password" type="password" :autocomplete="Math.random()" required @input="onChangePassword" :with-password-meter="true" styl="fill">
 			<span>%i18n:@password%</span>
 			<span slot="prefix">%fa:lock%</span>
 			<div slot="text">
@@ -27,7 +27,7 @@
 				<p slot="text" v-if="passwordStrength == 'high'" style="color:#3CB7B5">%fa:check .fw% %i18n:@strong-password%</p>
 			</div>
 		</ui-input>
-		<ui-input v-model="retypedPassword" type="password" :autocomplete="Math.random()" required @input="onChangePasswordRetype">
+		<ui-input v-model="retypedPassword" type="password" :autocomplete="Math.random()" required @input="onChangePasswordRetype" styl="fill">
 			<span>%i18n:@password% (%i18n:@retype%)</span>
 			<span slot="prefix">%fa:lock%</span>
 			<div slot="text">
diff --git a/src/client/app/common/views/components/ui/input.vue b/src/client/app/common/views/components/ui/input.vue
index d7e72409f..abbd5a2fe 100644
--- a/src/client/app/common/views/components/ui/input.vue
+++ b/src/client/app/common/views/components/ui/input.vue
@@ -71,14 +71,18 @@ export default Vue.extend({
 			type: Boolean,
 			required: false,
 			default: false
+		},
+		styl: {
+			type: String,
+			required: false,
+			default: 'line'
 		}
 	},
 	data() {
 		return {
 			v: this.value,
 			focused: false,
-			passwordStrength: '',
-			styl: 'fill'
+			passwordStrength: ''
 		};
 	},
 	computed: {
@@ -117,14 +121,6 @@ export default Vue.extend({
 			}
 		}
 	},
-	inject: {
-		isCardChild: { default: false }
-	},
-	created() {
-		if (this.isCardChild) {
-			this.styl = 'line';
-		}
-	},
 	mounted() {
 		if (this.$refs.prefix) {
 			this.$refs.label.style.left = (this.$refs.prefix.offsetLeft + this.$refs.prefix.offsetWidth) + 'px';
diff --git a/src/client/app/common/views/components/ui/select.vue b/src/client/app/common/views/components/ui/select.vue
index 8c1b8c026..da6f9696b 100644
--- a/src/client/app/common/views/components/ui/select.vue
+++ b/src/client/app/common/views/components/ui/select.vue
@@ -29,13 +29,17 @@ export default Vue.extend({
 		required: {
 			type: Boolean,
 			required: false
+		},
+		styl: {
+			type: String,
+			required: false,
+			default: 'line'
 		}
 	},
 	data() {
 		return {
 			v: this.value,
-			focused: false,
-			styl: 'fill'
+			focused: false
 		};
 	},
 	computed: {
@@ -48,14 +52,6 @@ export default Vue.extend({
 			this.v = v;
 		}
 	},
-	inject: {
-		isCardChild: { default: false }
-	},
-	created() {
-		if (this.isCardChild) {
-			this.styl = 'line';
-		}
-	},
 	mounted() {
 		if (this.$refs.prefix) {
 			this.$refs.label.style.left = (this.$refs.prefix.offsetLeft + this.$refs.prefix.offsetWidth) + 'px';
diff --git a/src/client/app/mobile/views/pages/drive.vue b/src/client/app/mobile/views/pages/drive.vue
index c0fc7b48d..bf02adca9 100644
--- a/src/client/app/mobile/views/pages/drive.vue
+++ b/src/client/app/mobile/views/pages/drive.vue
@@ -44,7 +44,6 @@ export default Vue.extend({
 	},
 	mounted() {
 		document.title = `${(this as any).os.instanceName} Drive`;
-		document.documentElement.style.background = '#fff';
 	},
 	beforeDestroy() {
 		window.removeEventListener('popstate', this.onPopState);
diff --git a/src/client/app/mobile/views/pages/games/reversi.vue b/src/client/app/mobile/views/pages/games/reversi.vue
index f3bba586d..7f8f91900 100644
--- a/src/client/app/mobile/views/pages/games/reversi.vue
+++ b/src/client/app/mobile/views/pages/games/reversi.vue
@@ -11,7 +11,6 @@ import Vue from 'vue';
 export default Vue.extend({
 	mounted() {
 		document.title = `${(this as any).os.instanceName} %i18n:@reversi%`;
-		document.documentElement.style.background = '#fff';
 	},
 	methods: {
 		nav(game, actualNav) {