diff --git a/packages/ui/package.json b/packages/ui/package.json
index 8b8f22098..725702618 100644
--- a/packages/ui/package.json
+++ b/packages/ui/package.json
@@ -64,10 +64,21 @@
     "extends": "@silverhand/react"
   },
   "stylelint": {
-    "extends": "@silverhand/eslint-config-react/.stylelintrc"
+    "extends": "@silverhand/eslint-config-react/.stylelintrc",
+    "rules": {
+      "selector-pseudo-class-no-unknown": [
+        true,
+        {
+          "ignorePseudoClasses": [
+            "global"
+          ]
+        }
+      ]
+    }
   },
   "prettier": "@silverhand/eslint-config/.prettierrc",
   "dependencies": {
+    "react-device-detect": "^2.2.2",
     "use-debounced-loader": "^0.1.1"
   }
 }
diff --git a/packages/ui/src/components/AppContent/index.module.scss b/packages/ui/src/components/AppContent/index.module.scss
index b28d9b9b6..d77fba575 100644
--- a/packages/ui/src/components/AppContent/index.module.scss
+++ b/packages/ui/src/components/AppContent/index.module.scss
@@ -1,30 +1,61 @@
 @use '@/scss/underscore' as _;
-@use '@/scss/colors' as colors;
-@use '@/scss/basic' as basic;
+@use '@/scss/mobile' as mobile;
+@use '@/scss/desktop' as desktop;
 
-/* Foundation */
-.light {
-  @include colors.light-theme;
-}
-
-.dark {
-  @include colors.dark-theme;
-}
-
-body {
-  @include colors.universal;
-  @include basic.fonts;
-  @include basic.layout;
-  background: var(--color-base);
-  color: var(--color-text);
-  font: var(--font-body);
-}
 
 .content {
-  position: absolute;
-  top: 0;
-  left: 0;
-  right: 0;
-  min-height: 100%;
-  background: var(--color-base);
+  @include _.flex_column;
+  background-color: var(--color-base);
+}
+
+main {
+  position: absolute;
+  inset: 0;
+  background: var(--color-surface);
+  color: var(--color-text);
+  font: var(--font-body);
+  @include _.flex_column;
+}
+
+/* Foundation */
+:global(body.mobile) {
+  &.light {
+    @include mobile.colors-light-theme;
+  }
+
+  &.dark {
+    @include mobile.colors-dark-theme;
+  }
+
+  @include mobile.colors-universal;
+  @include mobile.fonts;
+  @include mobile.layout;
+
+  .content {
+    flex: 1;
+    align-self: stretch;
+    padding: _.unit(6) _.unit(5);
+    position: relative;
+  }
+}
+
+:global(body.desktop) {
+  &.light {
+    @include desktop.colors-light-theme;
+  }
+
+  &.dark {
+    @include desktop.colors-dark-theme;
+  }
+
+  @include desktop.colors-universal;
+  @include desktop.fonts;
+  @include desktop.layout;
+
+  .content {
+    width: 640px;
+    min-height: 640px;
+    position: relative;
+    padding: _.unit(6);
+  }
 }
diff --git a/packages/ui/src/components/AppContent/index.tsx b/packages/ui/src/components/AppContent/index.tsx
index 877ab17d2..3f248b54a 100644
--- a/packages/ui/src/components/AppContent/index.tsx
+++ b/packages/ui/src/components/AppContent/index.tsx
@@ -1,5 +1,6 @@
-import classNames from 'classnames';
+import { conditionalString } from '@silverhand/essentials';
 import React, { ReactNode, useEffect, useCallback, useContext } from 'react';
+import { isMobile } from 'react-device-detect';
 import { useDebouncedLoader } from 'use-debounced-loader';
 
 import LoadingLayer from '@/components/LoadingLayer';
@@ -24,14 +25,17 @@ const AppContent = ({ children }: Props) => {
   }, [setToast]);
 
   useEffect(() => {
-    document.body.classList.remove(styles.light ?? '');
-    document.body.classList.remove(styles.dark ?? '');
-    document.body.classList.add(styles[theme] ?? '');
+    document.body.classList.remove(conditionalString(styles.light), conditionalString(styles.dark));
+    document.body.classList.add(conditionalString(styles[theme]));
   }, [theme]);
 
+  useEffect(() => {
+    document.body.classList.add(isMobile ? 'mobile' : 'desktop');
+  }, []);
+
   return (
-    <main className={classNames(styles.content, styles[theme])}>
-      {children}
+    <main>
+      <div className={styles.content}>{children}</div>
       <Toast message={toast} isVisible={Boolean(toast)} callback={hideToast} />
       {debouncedLoading && <LoadingLayer />}
     </main>
diff --git a/packages/ui/src/components/Drawer/index.module.scss b/packages/ui/src/components/Drawer/index.module.scss
index 1c0ed4958..896f546ee 100644
--- a/packages/ui/src/components/Drawer/index.module.scss
+++ b/packages/ui/src/components/Drawer/index.module.scss
@@ -30,7 +30,6 @@
 
 
 /* stylelint-disable selector-class-pattern */
-/* stylelint-disable-next-line selector-pseudo-class-no-unknown */
 :global {
   .ReactModal__Content[role='popup'] {
     transform: translateY(100%);
diff --git a/packages/ui/src/components/NavBar/index.module.scss b/packages/ui/src/components/NavBar/index.module.scss
index 0ef896af7..e98e0527b 100644
--- a/packages/ui/src/components/NavBar/index.module.scss
+++ b/packages/ui/src/components/NavBar/index.module.scss
@@ -10,7 +10,7 @@
 
   svg {
     position: absolute;
-    left: _.unit(4);
+    left: _.unit(-2);
     top: 50%;
     transform: translateY(-50%);
     fill: var(--color-text);
diff --git a/packages/ui/src/pages/Callback/index.module.scss b/packages/ui/src/pages/Callback/index.module.scss
index b4307e2e9..261cf702a 100644
--- a/packages/ui/src/pages/Callback/index.module.scss
+++ b/packages/ui/src/pages/Callback/index.module.scss
@@ -2,9 +2,9 @@
 
 
 .wrapper {
-  @include _.page-wrapper;
-  position: absolute;
-  inset: 0;
+  @include _.full-page;
+  @include _.flex-column;
+  justify-content: flex-start;
 }
 
 .connector {
diff --git a/packages/ui/src/pages/Consent/index.module.scss b/packages/ui/src/pages/Consent/index.module.scss
index ababfac6a..98fe51026 100644
--- a/packages/ui/src/pages/Consent/index.module.scss
+++ b/packages/ui/src/pages/Consent/index.module.scss
@@ -1,7 +1,9 @@
 @use '@/scss/underscore' as _;
 
 .wrapper {
-  @include _.page-wrapper;
+  @include _.full-page;
+  @include _.flex-column;
+  justify-content: flex-start;
 
   .header {
     margin-top: _.unit(30);
diff --git a/packages/ui/src/pages/ErrorPage/index.module.scss b/packages/ui/src/pages/ErrorPage/index.module.scss
index 1b6afa959..6c1734a25 100644
--- a/packages/ui/src/pages/ErrorPage/index.module.scss
+++ b/packages/ui/src/pages/ErrorPage/index.module.scss
@@ -1,14 +1,14 @@
 @use '@/scss/underscore' as _;
 
-.container {
-  position: absolute;
-  inset: 0;
+.wrapper {
+  @include _.full-page;
   @include _.flex-column;
   align-items: stretch;
 
-  .wrapper {
+  .container {
     flex: 1;
-    @include _.page-wrapper;
+    @include _.flex-column;
+    justify-content: flex-start;
   }
 
   .icon {
diff --git a/packages/ui/src/pages/ErrorPage/index.tsx b/packages/ui/src/pages/ErrorPage/index.tsx
index 546e8a8a6..402b8c7c6 100644
--- a/packages/ui/src/pages/ErrorPage/index.tsx
+++ b/packages/ui/src/pages/ErrorPage/index.tsx
@@ -18,9 +18,9 @@ const ErrorPage = ({ title = 'description.not_found', message }: Props) => {
   const navigate = useNavigate();
 
   return (
-    <div className={styles.container}>
+    <div className={styles.wrapper}>
       <NavBar />
-      <div className={styles.wrapper}>
+      <div className={styles.container}>
         <ErrorIcon className={styles.icon} />
         <div className={styles.title}>{t(title)}</div>
         {message && <div className={styles.message}>{message}</div>}
diff --git a/packages/ui/src/pages/Passcode/index.module.scss b/packages/ui/src/pages/Passcode/index.module.scss
index 45b789f15..65357687d 100644
--- a/packages/ui/src/pages/Passcode/index.module.scss
+++ b/packages/ui/src/pages/Passcode/index.module.scss
@@ -1,8 +1,11 @@
 @use '@/scss/underscore' as _;
 
 .wrapper {
-  @include _.page-wrapper;
-  padding-top: _.unit(2);
+  @include _.full-page;
+}
+
+.container {
+  margin-top: _.unit(2);
 }
 
 .title {
diff --git a/packages/ui/src/pages/Passcode/index.tsx b/packages/ui/src/pages/Passcode/index.tsx
index 86757a893..3f75e52d6 100644
--- a/packages/ui/src/pages/Passcode/index.tsx
+++ b/packages/ui/src/pages/Passcode/index.tsx
@@ -43,14 +43,14 @@ const Passcode = () => {
   }
 
   return (
-    <>
+    <div className={styles.wrapper}>
       <NavBar />
-      <div className={styles.wrapper}>
+      <div className={styles.container}>
         <div className={styles.title}>{t('action.enter_passcode')}</div>
         <div className={styles.detail}>{t('description.enter_passcode', { address: target })}</div>
         <PasscodeValidation type={type} method={method} target={target} />
       </div>
-    </>
+    </div>
   );
 };
 
diff --git a/packages/ui/src/pages/Register/index.module.scss b/packages/ui/src/pages/Register/index.module.scss
index 7cfa4d351..c56283503 100644
--- a/packages/ui/src/pages/Register/index.module.scss
+++ b/packages/ui/src/pages/Register/index.module.scss
@@ -1,8 +1,11 @@
 @use '@/scss/underscore' as _;
 
 .wrapper {
-  @include _.page-wrapper;
-  padding-top: _.unit(2);
+  @include _.full-page;
+}
+
+.container {
+  margin-top: _.unit(2);
 }
 
 
diff --git a/packages/ui/src/pages/Register/index.tsx b/packages/ui/src/pages/Register/index.tsx
index 076309dc7..f41e84f5d 100644
--- a/packages/ui/src/pages/Register/index.tsx
+++ b/packages/ui/src/pages/Register/index.tsx
@@ -34,13 +34,13 @@ const Register = () => {
   }
 
   return (
-    <>
+    <div className={styles.wrapper}>
       <NavBar />
-      <div className={styles.wrapper}>
+      <div className={styles.container}>
         <div className={styles.title}>{t('action.create_account')}</div>
         {registerForm}
       </div>
-    </>
+    </div>
   );
 };
 
diff --git a/packages/ui/src/pages/SecondarySignIn/index.module.scss b/packages/ui/src/pages/SecondarySignIn/index.module.scss
index 7cfa4d351..c56283503 100644
--- a/packages/ui/src/pages/SecondarySignIn/index.module.scss
+++ b/packages/ui/src/pages/SecondarySignIn/index.module.scss
@@ -1,8 +1,11 @@
 @use '@/scss/underscore' as _;
 
 .wrapper {
-  @include _.page-wrapper;
-  padding-top: _.unit(2);
+  @include _.full-page;
+}
+
+.container {
+  margin-top: _.unit(2);
 }
 
 
diff --git a/packages/ui/src/pages/SecondarySignIn/index.tsx b/packages/ui/src/pages/SecondarySignIn/index.tsx
index b405f19d1..d5ab02124 100644
--- a/packages/ui/src/pages/SecondarySignIn/index.tsx
+++ b/packages/ui/src/pages/SecondarySignIn/index.tsx
@@ -34,13 +34,13 @@ const SecondarySignIn = () => {
   }
 
   return (
-    <>
+    <div className={styles.wrapper}>
       <NavBar />
-      <div className={styles.wrapper}>
+      <div className={styles.container}>
         <div className={styles.title}>{t('action.sign_in')}</div>
         {signInForm}
       </div>
-    </>
+    </div>
   );
 };
 
diff --git a/packages/ui/src/pages/SignIn/index.module.scss b/packages/ui/src/pages/SignIn/index.module.scss
index 80e5e90e0..924456c5c 100644
--- a/packages/ui/src/pages/SignIn/index.module.scss
+++ b/packages/ui/src/pages/SignIn/index.module.scss
@@ -1,7 +1,9 @@
 @use '@/scss/underscore' as _;
 
 .wrapper {
-  @include _.page-wrapper;
+  @include _.full-page;
+  @include _.flex-column;
+  justify-content: flex-start;
 
   .header {
     margin: _.unit(8);
diff --git a/packages/ui/src/pages/SocialRegister/index.module.scss b/packages/ui/src/pages/SocialRegister/index.module.scss
index 43af2c306..61026a456 100644
--- a/packages/ui/src/pages/SocialRegister/index.module.scss
+++ b/packages/ui/src/pages/SocialRegister/index.module.scss
@@ -1,5 +1,9 @@
 @use '@/scss/underscore' as _;
 
 .wrapper {
-  @include _.page-wrapper;
+  @include _.full-page;
+}
+
+.container {
+  margin-top: _.unit(2);
 }
diff --git a/packages/ui/src/pages/SocialRegister/index.tsx b/packages/ui/src/pages/SocialRegister/index.tsx
index a2cad1ed0..c909ab783 100644
--- a/packages/ui/src/pages/SocialRegister/index.tsx
+++ b/packages/ui/src/pages/SocialRegister/index.tsx
@@ -20,12 +20,12 @@ const SocialRegister = () => {
   }
 
   return (
-    <>
+    <div className={styles.wrapper}>
       <NavBar title={t('description.bind_account_title')} />
-      <div className={styles.wrapper}>
+      <div className={styles.container}>
         <SocialCreateAccount connectorId={connector} />
       </div>
-    </>
+    </div>
   );
 };
 
diff --git a/packages/ui/src/scss/_basic.scss b/packages/ui/src/scss/_basic.scss
deleted file mode 100644
index aed87afde..000000000
--- a/packages/ui/src/scss/_basic.scss
+++ /dev/null
@@ -1,22 +0,0 @@
-/* Foundation */
-$font-family: -apple-system,
-  system-ui,
-  'BlinkMacSystemFont',
-  'Segoe UI',
-  'Roboto',
-  'Helvetica Neue',
-  'Helvetica',
-  'Arial',
-  sans-serif;
-
-@mixin fonts {
-  --font-title: 600 32px/40px #{$font-family};
-  --font-body-bold: 500 16px/20px #{$font-family};
-  --font-body: 400 16px/20px #{$font-family};
-  --font-body-small: 500 14px/18px #{$font-family};
-  --font-caption: 400 14px/18px #{$font-family};
-}
-
-@mixin layout {
-  --radius: 8px;
-}
diff --git a/packages/ui/src/scss/_desktop.scss b/packages/ui/src/scss/_desktop.scss
new file mode 100644
index 000000000..b60ff57a1
--- /dev/null
+++ b/packages/ui/src/scss/_desktop.scss
@@ -0,0 +1,63 @@
+/* Foundation */
+$font-family: -apple-system,
+  system-ui,
+  'BlinkMacSystemFont',
+  'Segoe UI',
+  'Roboto',
+  'Helvetica Neue',
+  'Helvetica',
+  'Arial',
+  sans-serif;
+
+@mixin colors-light-theme {
+  --color-surface: #ecebf6;
+  --color-base: #fff;
+  // legacy bellow
+  --color-text: #191c1d;
+  --color-icon: #747778;
+  --color-caption: #747778;
+  --color-outline: #78767f;
+  --color-border: #e0e3e3;
+  --color-disabled: #c4c7c7;
+  --color-primary: #5d34f2;
+  --color-layer: #eff1f1;
+  --color-error: #ba1b1b;
+  --color-toast: rgba(25, 28, 29, 80%);
+  --color-overlay: rgba(25, 28, 29, 16%);
+  --color-dialogue: #fff;
+}
+
+@mixin colors-dark-theme {
+  --color-surface: #25272b;
+  --color-base: #2a2c32;
+  // legacy bellow
+  --color-text: #f7f8f8;
+  --color-icon: #a9acac;
+  --color-caption: #a9acac;
+  --color-outline: #928f9a;
+  --color-border: #444748;
+  --color-disabled: #5c5f60;
+  --color-primary: #7958ff;
+  --color-layer: linear-gradient(0deg, rgba(202, 190, 255, 14%), rgba(202, 190, 255, 14%)), linear-gradient(0deg, rgba(196, 199, 199, 2%), rgba(196, 199, 199, 2%)), #191c1d;
+  --color-error: #dd3730;
+  --color-toast: rgba(247, 248, 248, 80%);
+  --color-overlay: rgba(25, 28, 29, 40%);
+  --color-dialogue: linear-gradient(0deg, rgba(202, 190, 255, 8%), rgba(202, 190, 255, 8%)), linear-gradient(0deg, rgba(196, 199, 199, 2%), rgba(196, 199, 199, 2%)), #191c1d;
+}
+
+
+@mixin colors-universal {
+  --color-primary-button-text: #fff;
+}
+
+@mixin fonts {
+  --font-title: 600 32px/40px #{$font-family};
+  --font-body-bold: 500 16px/20px #{$font-family};
+  --font-body: 400 16px/20px #{$font-family};
+  --font-body-small: 500 14px/18px #{$font-family};
+  --font-caption: 400 14px/18px #{$font-family};
+}
+
+@mixin layout {
+  --radius: 8px;
+}
diff --git a/packages/ui/src/scss/_colors.scss b/packages/ui/src/scss/_mobile.scss
similarity index 64%
rename from packages/ui/src/scss/_colors.scss
rename to packages/ui/src/scss/_mobile.scss
index dd04da37f..112dd75af 100644
--- a/packages/ui/src/scss/_colors.scss
+++ b/packages/ui/src/scss/_mobile.scss
@@ -1,4 +1,15 @@
-@mixin light-theme {
+/* Foundation */
+$font-family: -apple-system,
+  system-ui,
+  'BlinkMacSystemFont',
+  'Segoe UI',
+  'Roboto',
+  'Helvetica Neue',
+  'Helvetica',
+  'Arial',
+  sans-serif;
+
+@mixin colors-light-theme {
   --color-text: #191c1d;
   --color-icon: #747778;
   --color-caption: #747778;
@@ -11,10 +22,11 @@
   --color-toast: rgba(25, 28, 29, 80%);
   --color-overlay: rgba(25, 28, 29, 16%);
   --color-base: #fff;
+  --color-surface: #fff;
   --color-dialogue: #fff;
 }
 
-@mixin dark-theme {
+@mixin colors-dark-theme {
   --color-text: #f7f8f8;
   --color-icon: #a9acac;
   --color-caption: #a9acac;
@@ -27,9 +39,23 @@
   --color-toast: rgba(247, 248, 248, 80%);
   --color-overlay: rgba(25, 28, 29, 40%);
   --color-base: #191c1d;
+  --color-surface: #191c1d;
   --color-dialogue: linear-gradient(0deg, rgba(202, 190, 255, 8%), rgba(202, 190, 255, 8%)), linear-gradient(0deg, rgba(196, 199, 199, 2%), rgba(196, 199, 199, 2%)), #191c1d;
 }
 
-@mixin universal {
+
+@mixin colors-universal {
   --color-primary-button-text: #fff;
 }
+
+@mixin fonts {
+  --font-title: 600 32px/40px #{$font-family};
+  --font-body-bold: 500 16px/20px #{$font-family};
+  --font-body: 400 16px/20px #{$font-family};
+  --font-body-small: 500 14px/18px #{$font-family};
+  --font-caption: 400 14px/18px #{$font-family};
+}
+
+@mixin layout {
+  --radius: 8px;
+}
diff --git a/packages/ui/src/scss/_underscore.scss b/packages/ui/src/scss/_underscore.scss
index bb63e0e2a..e368ae28d 100644
--- a/packages/ui/src/scss/_underscore.scss
+++ b/packages/ui/src/scss/_underscore.scss
@@ -29,11 +29,9 @@
   color: var(--color-text);
 }
 
-@mixin page-wrapper {
-  position: relative;
-  padding: unit(6) unit(5);
-  @include flex-column;
-  justify-content: flex-start;
+@mixin full-page {
+  flex: 1;
+  align-self: stretch;
 }
 
 @mixin container-width {
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 593fa84ba..2e50cb2a5 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -864,6 +864,7 @@ importers:
       postcss-modules: ^4.3.0
       prettier: ^2.3.2
       react: ^17.0.2
+      react-device-detect: ^2.2.2
       react-dom: ^17.0.2
       react-i18next: ^11.15.4
       react-modal: ^3.14.4
@@ -875,6 +876,7 @@ importers:
       typescript: ^4.6.2
       use-debounced-loader: ^0.1.1
     dependencies:
+      react-device-detect: 2.2.2_sfoxds7t5ydpegc3knd667wn6m
       use-debounced-loader: 0.1.1_react@17.0.2
     devDependencies:
       '@logto/jest-config': link:../jest-config
@@ -16755,6 +16757,17 @@ packages:
       - webpack
     dev: true
 
+  /react-device-detect/2.2.2_sfoxds7t5ydpegc3knd667wn6m:
+    resolution: {integrity: sha512-zSN1gIAztUekp5qUT/ybHwQ9fmOqVT1psxpSlTn1pe0CO+fnJHKRLOWWac5nKxOxvOpD/w84hk1I+EydrJp7SA==}
+    peerDependencies:
+      react: '>= 0.14.0'
+      react-dom: '>= 0.14.0'
+    dependencies:
+      react: 17.0.2
+      react-dom: 17.0.2_react@17.0.2
+      ua-parser-js: 1.0.2
+    dev: false
+
   /react-dnd-html5-backend/16.0.0:
     resolution: {integrity: sha512-be3lKEbbT8FQcoTjFlQ4ZXG/NVrFNJu9W0INc5rm/5EFQpHCkz+xpbB2U8j9uh5Bvk7AsJyQrZznEut0hrNPIA==}
     dependencies:
@@ -19530,6 +19543,10 @@ packages:
     resolution: {integrity: sha512-qLK/Xe9E2uzmYI3qLeOmI0tEOt+TBBQyUIAh4aAgU05FVYzeZrKUdkAZfBNVGRaHVgV0TDkdEngJSw/SyQchkQ==}
     dev: true
 
+  /ua-parser-js/1.0.2:
+    resolution: {integrity: sha512-00y/AXhx0/SsnI51fTc0rLRmafiGOM4/O+ny10Ps7f+j/b8p/ZY11ytMgznXkOVo4GQ+KwQG5UQLkLGirsACRg==}
+    dev: false
+
   /uglify-js/3.15.3:
     resolution: {integrity: sha512-6iCVm2omGJbsu3JWac+p6kUiOpg3wFO2f8lIXjfEb8RrmLjzog1wTPMmwKB7swfzzqxj9YM+sGUM++u1qN4qJg==}
     engines: {node: '>=0.8.0'}