Add new styles for app shell, tokens, and vault components

- Introduced `shell.css` for the main application layout, including styles for the app shell, top bar, and user interactions.
- Created `tokens.css` to define CSS variables for theming, including colors, shadows, and transition durations for light and dark modes.
- Developed `vault.css` for the vault component, implementing grid layouts, sidebar styles, search inputs, and list item designs.

src/router-public.ts

@@ -66,6 +66,15 @@ function handleNwFavicon(): Response {
   });
 }
 
+function handleMissingWebsiteIcon(): Response {
+  return new Response(null, {
+    status: 404,
+    headers: {
+      'Cache-Control': 'public, max-age=300',
+    },
+  });
+}
+
 function buildIconServiceBase(origin: string): string {
   return `${origin}/icons`;
 }
@@ -127,9 +136,9 @@ function normalizeIconHost(rawHost: string): string | null {
   }
 }
 
-async function handleWebsiteIcon(host: string): Promise<Response> {
+async function handleWebsiteIcon(host: string, fallbackMode: 'default' | 'not-found' = 'default'): Promise<Response> {
   const normalizedHost = normalizeIconHost(host);
-  if (!normalizedHost) return handleNwFavicon();
+  if (!normalizedHost) return fallbackMode === 'not-found' ? handleMissingWebsiteIcon() : handleNwFavicon();
 
   const encodedHost = encodeURIComponent(normalizedHost);
   const requestHeaders = { 'User-Agent': 'NodeWarden/1.0' };
@@ -172,9 +181,9 @@ async function handleWebsiteIcon(host: string): Promise<Response> {
       });
     }
 
-    return handleNwFavicon();
+    return fallbackMode === 'not-found' ? handleMissingWebsiteIcon() : handleNwFavicon();
   } catch {
-    return handleNwFavicon();
+    return fallbackMode === 'not-found' ? handleMissingWebsiteIcon() : handleNwFavicon();
   }
 }
 
@@ -221,7 +230,8 @@ export async function handlePublicRoute(
 
   const iconMatch = path.match(/^\/icons\/([^/]+)\/icon\.png$/i);
   if (iconMatch && method === 'GET') {
-    return handleWebsiteIcon(iconMatch[1]);
+    const fallbackMode = new URL(request.url).searchParams.get('fallback') === '404' ? 'not-found' : 'default';
+    return handleWebsiteIcon(iconMatch[1], fallbackMode);
   }
 
   const publicAttachmentMatch = path.match(/^\/api\/attachments\/([a-f0-9-]+)\/([a-f0-9-]+)$/i);

webapp/src/components/TotpCodesPage.tsx

@@ -65,6 +65,10 @@ function TotpListIcon({ cipher }: { cipher: Cipher }) {
   const uri = firstCipherUri(cipher);
   const host = hostFromUri(uri);
   const [errored, setErrored] = useState(() => (host ? failedIconHosts.has(host) : false));
+  useEffect(() => {
+    setErrored(host ? failedIconHosts.has(host) : false);
+  }, [host]);
+
   if (host && !errored) {
     return (
       <img

webapp/src/components/vault/vault-page-helpers.tsx

@@ -1,4 +1,4 @@
-import { useState } from 'preact/hooks';
+import { useEffect, useState } from 'preact/hooks';
 import {
   CreditCard,
   FileKey2,
@@ -161,7 +161,7 @@ export function hostFromUri(uri: string): string {
 }
 
 export function websiteIconUrl(host: string): string {
-  return `/icons/${encodeURIComponent(host)}/icon.png`;
+  return `/icons/${encodeURIComponent(host)}/icon.png?fallback=404`;
 }
 
 export function createEmptyLoginUri(): VaultDraftLoginUri {
@@ -433,6 +433,10 @@ export function VaultListIcon({ cipher }: { cipher: Cipher }) {
   const uri = firstCipherUri(cipher);
   const host = hostFromUri(uri);
   const [errored, setErrored] = useState(() => (host ? failedIconHosts.has(host) : false));
+  useEffect(() => {
+    setErrored(host ? failedIconHosts.has(host) : false);
+  }, [host]);
+
   if (host && !errored) {
     return (
       <img

webapp/src/lib/api/vault-sync.ts

@@ -14,7 +14,13 @@ export async function loadVaultSyncSnapshot(authedFetch: AuthedFetch): Promise<V
   if (existing) return existing;
 
   const request = (async () => {
-    const resp = await authedFetch('/api/sync');
+    const resp = await authedFetch('/api/sync', {
+      cache: 'no-store',
+      headers: {
+        'Cache-Control': 'no-cache',
+        Pragma: 'no-cache',
+      },
+    });
     if (!resp.ok) throw new Error('Failed to load vault');
     const body = await parseJson<VaultSyncResponse>(resp);
     return body || {};

webapp/src/styles/auth.css

@@ -0,0 +1,193 @@
+.loading-screen {
+  height: 100%;
+  display: grid;
+  place-items: center;
+  color: var(--muted);
+  font-size: 18px;
+  animation: fade-in-up var(--dur-panel) var(--ease-out-strong) both;
+}
+
+.auth-page {
+  min-height: 100%;
+  display: grid;
+  place-items: center;
+  padding: 24px;
+  position: relative;
+  background: transparent;
+}
+
+.public-send-page {
+  min-height: 80vh;
+  align-items: center;
+  justify-items: center;
+}
+
+.auth-card {
+  width: 100%;
+  position: relative;
+  background: var(--panel);
+  border: 1px solid var(--line);
+  border-radius: 24px;
+  box-shadow: var(--shadow-lg);
+  padding: 30px;
+  overflow: hidden;
+  transform-origin: 50% 24%;
+  animation: surface-enter 520ms var(--ease-out-strong) both;
+}
+
+.auth-card h1 {
+  margin: 0 0 4px 0;
+  text-align: center;
+}
+
+.standalone-shell {
+  width: min(640px, 100%);
+  display: grid;
+  gap: 14px;
+  animation: fade-in-up 420ms var(--ease-out-strong) both;
+}
+
+.standalone-brand {
+  display: inline-flex;
+  align-items: center;
+  gap: 14px;
+  margin-bottom: 12px;
+}
+
+.standalone-brand-outside {
+  justify-content: center;
+  width: 100%;
+  margin-bottom: 2px;
+}
+
+.standalone-brand-logo {
+  width: 56px;
+  height: 56px;
+  object-fit: contain;
+  flex-shrink: 0;
+  filter: drop-shadow(0 8px 18px rgba(43, 102, 217, 0.22));
+}
+
+.standalone-brand-wordmark {
+  display: block;
+  height: auto;
+  width: clamp(200px, 30vw, 360px);
+  max-width: 100%;
+  filter: drop-shadow(0 10px 22px rgba(43, 102, 217, 0.18));
+}
+
+.standalone-title {
+  margin: 0 0 4px 0;
+  text-align: left;
+  font-size: 31px;
+  line-height: 1.15;
+  letter-spacing: -0.035em;
+}
+
+.standalone-muted {
+  text-align: left;
+}
+
+.jwt-warning-head {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 10px;
+  margin-bottom: 10px;
+  color: #b45309;
+  text-align: center;
+}
+
+.jwt-warning-box {
+  border: 1px solid #f1d8a5;
+  border-radius: 12px;
+  background: #fffaf0;
+  padding: 12px 14px;
+}
+
+.jwt-warning-label {
+  font-size: 13px;
+  font-weight: 700;
+  color: #92400e;
+  margin-bottom: 6px;
+}
+
+.jwt-warning-copy {
+  margin: 0 0 14px;
+  color: #475569;
+  line-height: 1.6;
+}
+
+.jwt-warning-list {
+  margin: 0;
+  padding-left: 18px;
+  color: #334155;
+  line-height: 1.55;
+}
+
+.jwt-inline-link {
+  color: #1d4ed8;
+  font-weight: 700;
+  text-decoration: none;
+}
+
+.jwt-inline-link:hover {
+  text-decoration: underline;
+}
+
+.jwt-secret-fields {
+  margin-top: 8px;
+  display: grid;
+  gap: 6px;
+}
+
+.jwt-secret-row {
+  display: grid;
+  grid-template-columns: 88px minmax(0, 1fr);
+  gap: 8px;
+  align-items: start;
+}
+
+.jwt-secret-row > span {
+  color: #64748b;
+}
+
+.jwt-generator {
+  margin-top: 14px;
+}
+
+.jwt-generator-actions {
+  margin-top: 10px;
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  flex-wrap: wrap;
+}
+
+.jwt-copy-hint {
+  color: #15803d;
+  font-size: 13px;
+  font-weight: 700;
+}
+
+.standalone-footer {
+  width: 100%;
+  text-align: center;
+  font-size: 13px;
+  color: #64748b;
+}
+
+.standalone-footer a {
+  color: #1d4ed8;
+  font-weight: 700;
+  text-decoration: none;
+}
+
+.standalone-footer a:hover {
+  text-decoration: underline;
+}
+
+.standalone-version {
+  font-weight: 700;
+  color: #1d4ed8;
+}

webapp/src/styles/base.css

@@ -0,0 +1,27 @@
+* {
+  box-sizing: border-box;
+}
+
+html,
+body,
+#root {
+  margin: 0;
+  padding: 0;
+  width: 100%;
+  height: 100%;
+  color: var(--text);
+  background: var(--bg-accent);
+  font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
+}
+
+body {
+  position: relative;
+  transition:
+    background-color var(--dur-medium) var(--ease-smooth),
+    color var(--dur-medium) var(--ease-smooth);
+}
+
+body.dialog-open {
+  overflow: hidden;
+  overscroll-behavior: contain;
+}

webapp/src/styles/dark.css

@@ -0,0 +1,458 @@
+:root[data-theme='dark'] body,
+:root[data-theme='dark'] #root,
+:root[data-theme='dark'] .app-page,
+:root[data-theme='dark'] .auth-page {
+  background: transparent;
+  color: var(--text);
+}
+
+:root[data-theme='dark'] .app-shell,
+:root[data-theme='dark'] .auth-card,
+:root[data-theme='dark'] .dialog,
+:root[data-theme='dark'] .jwt-warning-box,
+:root[data-theme='dark'] .backup-operations-sidebar,
+:root[data-theme='dark'] .backup-destination-sidebar,
+:root[data-theme='dark'] .backup-detail-panel,
+:root[data-theme='dark'] .settings-subcard,
+:root[data-theme='dark'] .list-panel,
+:root[data-theme='dark'] .card,
+:root[data-theme='dark'] .sidebar-block,
+:root[data-theme='dark'] .empty {
+  background: var(--panel);
+  border-color: var(--line);
+  color: var(--text);
+  box-shadow: var(--shadow-lg);
+}
+
+:root[data-theme='dark'] .topbar,
+:root[data-theme='dark'] .mobile-tabbar,
+:root[data-theme='dark'] .sort-menu,
+:root[data-theme='dark'] .create-menu,
+:root[data-theme='dark'] .dialog-card,
+:root[data-theme='dark'] .mobile-sidebar-sheet,
+:root[data-theme='dark'] .mobile-detail-sheet {
+  background: var(--panel-soft);
+  border-color: var(--line);
+  color: var(--text);
+}
+
+:root[data-theme='dark'] .dialog-card.warning {
+  border-color: rgba(248, 113, 113, 0.36);
+  background: linear-gradient(180deg, rgba(39, 16, 16, 0.98), rgba(27, 12, 12, 0.98));
+  box-shadow:
+    0 36px 90px rgba(5, 5, 5, 0.56),
+    0 0 0 1px rgba(248, 113, 113, 0.12) inset;
+}
+
+:root[data-theme='dark'] .dialog-mask.warning {
+  background:
+    radial-gradient(circle at top, rgba(127, 29, 29, 0.28), transparent 34%),
+    linear-gradient(180deg, rgba(20, 12, 12, 0.64), rgba(2, 6, 23, 0.82));
+}
+
+:root[data-theme='dark'] .dialog-warning-badge {
+  background: linear-gradient(180deg, rgba(127, 29, 29, 0.8), rgba(69, 10, 10, 0.86));
+  color: #fda4af;
+  box-shadow:
+    0 12px 30px rgba(0, 0, 0, 0.32),
+    0 0 0 1px rgba(248, 113, 113, 0.14) inset;
+}
+
+:root[data-theme='dark'] .dialog-warning-kicker,
+:root[data-theme='dark'] .dialog-card.warning .dialog-title {
+  color: #fecaca;
+}
+
+:root[data-theme='dark'] .dialog-message.warning {
+  border-color: rgba(248, 113, 113, 0.18);
+  background: linear-gradient(180deg, rgba(69, 10, 10, 0.54), rgba(67, 20, 7, 0.46));
+  color: #fecdd3;
+  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.18) inset;
+}
+
+:root[data-theme='dark'] .app-side,
+:root[data-theme='dark'] .sidebar,
+:root[data-theme='dark'] .mobile-sidebar-sheet .sidebar-block {
+  background: var(--panel-muted);
+  border-color: var(--line);
+}
+
+:root[data-theme='dark'] .auth-card {
+  background: var(--panel);
+}
+
+:root[data-theme='dark'] .brand,
+:root[data-theme='dark'] .mobile-page-title,
+:root[data-theme='dark'] .detail-title,
+:root[data-theme='dark'] .dialog-title,
+:root[data-theme='dark'] .standalone-title,
+:root[data-theme='dark'] .kv-main strong,
+:root[data-theme='dark'] .list-title,
+:root[data-theme='dark'] .sidebar-title,
+:root[data-theme='dark'] h1,
+:root[data-theme='dark'] h2,
+:root[data-theme='dark'] h3,
+:root[data-theme='dark'] h4 {
+  color: var(--text);
+}
+
+:root[data-theme='dark'] .standalone-brand-wordmark,
+:root[data-theme='dark'] .brand-wordmark {
+  text-shadow: 0 16px 28px rgba(2, 6, 23, 0.32);
+}
+
+:root[data-theme='dark'] .muted,
+:root[data-theme='dark'] .detail-sub,
+:root[data-theme='dark'] .field-help,
+:root[data-theme='dark'] .list-sub,
+:root[data-theme='dark'] .kv-label,
+:root[data-theme='dark'] .standalone-muted,
+:root[data-theme='dark'] .standalone-footer,
+:root[data-theme='dark'] .backup-inline-note,
+:root[data-theme='dark'] .backup-browser-empty,
+:root[data-theme='dark'] .or,
+:root[data-theme='dark'] .mobile-tab,
+:root[data-theme='dark'] .side-link,
+:root[data-theme='dark'] .user-chip,
+:root[data-theme='dark'] .list-count {
+  color: var(--muted);
+}
+
+:root[data-theme='dark'] .user-chip {
+  background: rgba(17, 34, 56, 0.94);
+  border-color: var(--line);
+  box-shadow: 0 12px 24px rgba(1, 7, 18, 0.24);
+}
+
+:root[data-theme='dark'] .side-link:hover,
+:root[data-theme='dark'] .mobile-tab:hover {
+  background: rgba(132, 182, 255, 0.11);
+}
+
+:root[data-theme='dark'] .side-link.active,
+:root[data-theme='dark'] .mobile-tab.active,
+:root[data-theme='dark'] .sort-menu-item.active,
+:root[data-theme='dark'] .list-item.active {
+  background: linear-gradient(135deg, rgba(132, 182, 255, 0.2), rgba(56, 189, 248, 0.08));
+  border-color: rgba(132, 182, 255, 0.28);
+  color: var(--primary);
+}
+
+:root[data-theme='dark'] .input,
+:root[data-theme='dark'] .textarea,
+:root[data-theme='dark'] select.input,
+:root[data-theme='dark'] .dialog input,
+:root[data-theme='dark'] .dialog textarea,
+:root[data-theme='dark'] .dialog select {
+  background: rgba(13, 24, 40, 0.94);
+  border-color: rgba(103, 136, 186, 0.36);
+  color: var(--text);
+  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
+}
+
+:root[data-theme='dark'] .input::placeholder,
+:root[data-theme='dark'] .textarea::placeholder,
+:root[data-theme='dark'] input::placeholder,
+:root[data-theme='dark'] textarea::placeholder {
+  color: #7488a8;
+}
+
+:root[data-theme='dark'] .input:focus,
+:root[data-theme='dark'] .textarea:focus,
+:root[data-theme='dark'] .search-input:focus,
+:root[data-theme='dark'] .dialog input:focus,
+:root[data-theme='dark'] .dialog textarea:focus,
+:root[data-theme='dark'] .dialog select:focus {
+  border-color: rgba(132, 182, 255, 0.54);
+  background-color: rgba(16, 30, 49, 0.98);
+  box-shadow: 0 0 0 4px rgba(132, 182, 255, 0.12), 0 10px 22px rgba(5, 13, 28, 0.24), inset 0 1px 0 rgba(255, 255, 255, 0.04);
+}
+
+:root[data-theme='dark'] select.input {
+  background-image:
+    linear-gradient(45deg, transparent 50%, #8fb8ff 50%),
+    linear-gradient(135deg, #8fb8ff 50%, transparent 50%);
+}
+
+:root[data-theme='dark'] .input-readonly {
+  background: #0f1b2d;
+  color: var(--muted-strong);
+}
+
+:root[data-theme='dark'] .input:disabled,
+:root[data-theme='dark'] .btn:disabled {
+  background: #132033;
+  border-color: #22334c;
+  color: #70829d;
+}
+
+:root[data-theme='dark'] .btn-secondary {
+  background: linear-gradient(180deg, rgba(22, 41, 66, 0.98), rgba(16, 31, 52, 0.98));
+  border-color: rgba(132, 182, 255, 0.22);
+  color: #a9cdff;
+  box-shadow: 0 12px 22px rgba(1, 7, 18, 0.18);
+}
+
+:root[data-theme='dark'] .btn-secondary:hover {
+  background: linear-gradient(180deg, rgba(26, 49, 79, 0.98), rgba(19, 37, 61, 0.98));
+  border-color: rgba(132, 182, 255, 0.3);
+}
+
+:root[data-theme='dark'] .btn-danger {
+  background: linear-gradient(180deg, rgba(45, 23, 33, 0.98), rgba(35, 18, 28, 0.98));
+  border-color: rgba(255, 139, 168, 0.38);
+  color: #ff9bb0;
+}
+
+:root[data-theme='dark'] .btn-danger:hover {
+  background: linear-gradient(180deg, rgba(56, 27, 40, 0.98), rgba(41, 19, 31, 0.98));
+  border-color: rgba(255, 171, 192, 0.42);
+}
+
+:root[data-theme='dark'] .btn-primary {
+  background: linear-gradient(135deg, #79acff, #57c2ff 76%);
+  border-color: rgba(176, 214, 255, 0.22);
+  color: #061120;
+  box-shadow: 0 18px 32px rgba(10, 26, 52, 0.34);
+}
+
+:root[data-theme='dark'] .btn-primary:hover {
+  background: linear-gradient(135deg, #90bcff, #6accff 76%);
+  box-shadow: 0 22px 36px rgba(10, 26, 52, 0.38);
+}
+
+:root[data-theme='dark'] .toolbar.actions,
+:root[data-theme='dark'] .list-head,
+:root[data-theme='dark'] .mobile-panel-head,
+:root[data-theme='dark'] .backup-recommendation-header,
+:root[data-theme='dark'] .backup-operations-sidebar,
+:root[data-theme='dark'] .backup-destination-sidebar,
+:root[data-theme='dark'] .backup-detail-panel,
+:root[data-theme='dark'] .detail-actions,
+:root[data-theme='dark'] .topbar,
+:root[data-theme='dark'] .app-side,
+:root[data-theme='dark'] .kv-row,
+:root[data-theme='dark'] .attachment-row,
+:root[data-theme='dark'] .backup-browser-row {
+  border-color: var(--line);
+}
+
+:root[data-theme='dark'] .input,
+:root[data-theme='dark'] .search-input,
+:root[data-theme='dark'] .list-item,
+:root[data-theme='dark'] .sidebar-block {
+  background: rgba(15, 28, 45, 0.94);
+}
+
+:root[data-theme='dark'] .sidebar,
+:root[data-theme='dark'] .content,
+:root[data-theme='dark'] .list-col,
+:root[data-theme='dark'] .detail-col {
+  color: var(--text);
+}
+
+:root[data-theme='dark'] .mobile-sidebar-mask,
+:root[data-theme='dark'] .dialog-mask {
+  background: var(--overlay-strong);
+}
+
+:root[data-theme='dark'] .toast {
+  background: linear-gradient(180deg, rgba(19, 34, 54, 0.98), rgba(14, 26, 42, 0.98));
+  border-color: #263a57;
+  color: var(--text);
+}
+
+:root[data-theme='dark'] .toast.success {
+  background: #0f2a1f;
+  border-color: #1f5b44;
+  color: #9be2bd;
+}
+
+:root[data-theme='dark'] .toast.error {
+  background: #2a1720;
+  border-color: #6c2b41;
+  color: #ffb1c0;
+}
+
+:root[data-theme='dark'] .toast.warning {
+  background: #2d2413;
+  border-color: #7b6230;
+  color: #f7d48b;
+}
+
+:root[data-theme='dark'] .jwt-warning-head,
+:root[data-theme='dark'] .jwt-warning-label,
+:root[data-theme='dark'] .jwt-warning-copy,
+:root[data-theme='dark'] .jwt-warning-list {
+  color: #f4d48a;
+}
+
+:root[data-theme='dark'] .theme-switch-input:focus + .theme-switch-slider {
+  box-shadow: 0 0 0 2px rgba(132, 182, 255, 0.24);
+}
+
+:root[data-theme='dark'] .search-input,
+:root[data-theme='dark'] .list-head .search-input,
+:root[data-theme='dark'] .mobile-settings-card,
+:root[data-theme='dark'] .mobile-settings-link,
+:root[data-theme='dark'] .table tr,
+:root[data-theme='dark'] .settings-subcard,
+:root[data-theme='dark'] .backup-operations-sidebar,
+:root[data-theme='dark'] .backup-destination-sidebar,
+:root[data-theme='dark'] .backup-detail-panel,
+:root[data-theme='dark'] .dialog-card,
+:root[data-theme='dark'] .backup-browser-path,
+:root[data-theme='dark'] .backup-browser-list,
+:root[data-theme='dark'] .create-menu,
+:root[data-theme='dark'] .create-menu-item,
+:root[data-theme='dark'] .sort-menu,
+:root[data-theme='dark'] .sort-menu-item,
+:root[data-theme='dark'] .backup-recommendation-card,
+:root[data-theme='dark'] .backup-recommendation-dav-item,
+:root[data-theme='dark'] .backup-destination-item,
+:root[data-theme='dark'] .totp-code-row,
+:root[data-theme='dark'] .list-item {
+  background:
+    linear-gradient(180deg, rgba(18, 32, 52, 0.92), rgba(14, 26, 42, 0.92));
+  border-color: var(--line);
+  color: var(--text);
+}
+
+:root[data-theme='dark'] .list-item:hover,
+:root[data-theme='dark'] .sort-menu-item:hover,
+:root[data-theme='dark'] .create-menu-item:hover,
+:root[data-theme='dark'] .mobile-settings-link:hover,
+:root[data-theme='dark'] .backup-destination-item:hover {
+  background:
+    linear-gradient(180deg, rgba(24, 44, 70, 0.96), rgba(16, 31, 51, 0.96));
+  border-color: rgba(118, 150, 197, 0.32);
+}
+
+:root[data-theme='dark'] .list-item.active {
+  background: linear-gradient(135deg, rgba(132, 182, 255, 0.2), rgba(56, 189, 248, 0.1));
+  border-color: rgba(122, 176, 255, 0.34);
+  box-shadow: inset 0 0 0 1px rgba(200, 225, 255, 0.06), 0 12px 24px rgba(5, 13, 28, 0.18);
+}
+
+:root[data-theme='dark'] .list-item::before {
+  background:
+    linear-gradient(90deg, rgba(132, 182, 255, 0.08), transparent 24%, transparent 76%, rgba(56, 189, 248, 0.08)),
+    radial-gradient(circle at 18px 50%, rgba(255, 255, 255, 0.06), transparent 44%);
+}
+
+:root[data-theme='dark'] .backup-destination-item.active,
+:root[data-theme='dark'] .backup-interval-preset.active,
+:root[data-theme='dark'] .mobile-settings-link.active,
+:root[data-theme='dark'] .tree-btn.active {
+  background: linear-gradient(135deg, rgba(132, 182, 255, 0.2), rgba(56, 189, 248, 0.1));
+  border-color: rgba(132, 182, 255, 0.34);
+  color: #f4f8ff;
+}
+
+:root[data-theme='dark'] .theme-switch-slider {
+  background: linear-gradient(180deg, #1d3659, #142845);
+  border-color: rgba(120, 152, 198, 0.34);
+}
+
+:root[data-theme='dark'] .theme-switch-slider::before {
+  background: linear-gradient(180deg, #f8fbff, #dce9ff);
+  box-shadow: 0 3px 10px rgba(2, 8, 20, 0.28);
+}
+
+:root[data-theme='dark'] .theme-switch .moon svg {
+  fill: #8db6ff;
+}
+
+:root[data-theme='dark'] .theme-switch .sun svg {
+  opacity: 0.82;
+}
+
+:root[data-theme='dark'] .totp-code-name,
+:root[data-theme='dark'] .backup-destination-name,
+:root[data-theme='dark'] .backup-browser-entry,
+:root[data-theme='dark'] .mobile-settings-link,
+:root[data-theme='dark'] .backup-browser-path strong,
+:root[data-theme='dark'] .backup-option-label,
+:root[data-theme='dark'] .sort-menu-item,
+:root[data-theme='dark'] .create-menu-item,
+:root[data-theme='dark'] .tree-btn,
+:root[data-theme='dark'] .folder-add-btn,
+:root[data-theme='dark'] .list-icon-fallback,
+:root[data-theme='dark'] .totp-code-main strong,
+:root[data-theme='dark'] .totp-timer-value {
+  color: var(--text);
+}
+
+:root[data-theme='dark'] .totp-code-username,
+:root[data-theme='dark'] .backup-destination-meta,
+:root[data-theme='dark'] .backup-browser-meta,
+:root[data-theme='dark'] .table td::before,
+:root[data-theme='dark'] .backup-recommendation-step,
+:root[data-theme='dark'] .backup-recommendation-inline-note,
+:root[data-theme='dark'] .backup-recommendation-linked-item,
+:root[data-theme='dark'] .backup-inline-suffix,
+:root[data-theme='dark'] .folder-delete-btn,
+:root[data-theme='dark'] .folder-add-btn:hover,
+:root[data-theme='dark'] .tree-label,
+:root[data-theme='dark'] .list-sub {
+  color: var(--muted);
+}
+
+:root[data-theme='dark'] .import-export-panel p,
+:root[data-theme='dark'] .dialog-message,
+:root[data-theme='dark'] .local-error,
+:root[data-theme='dark'] .status-ok {
+  color: var(--muted);
+}
+
+:root[data-theme='dark'] .backup-destination-type {
+  background: #1d3048;
+  color: #c9d8eb;
+}
+
+:root[data-theme='dark'] .backup-help-trigger {
+  border-color: #38618f;
+  background: #173150;
+  color: #9ec5ff;
+}
+
+:root[data-theme='dark'] .backup-help-trigger:hover,
+:root[data-theme='dark'] .backup-help-trigger:focus-visible {
+  border-color: #5f92d7;
+  background: #20426a;
+}
+
+:root[data-theme='dark'] .backup-help-bubble {
+  background: var(--panel);
+  border-color: var(--line);
+  color: var(--text);
+}
+
+:root[data-theme='dark'] .backup-help-bubble::before {
+  background: var(--panel);
+  border-left-color: var(--line);
+  border-top-color: var(--line);
+}
+
+:root[data-theme='dark'] .table td {
+  border-bottom-color: #203047;
+}
+
+:root[data-theme='dark'] .local-error {
+  color: #ff9bb0;
+}
+
+:root[data-theme='dark'] .status-ok {
+  color: #9be2bd;
+}
+
+:root[data-theme='dark'] .totp-qr {
+  background: #ffffff;
+  border-color: rgba(15, 23, 42, 0.12);
+}
+
+:root[data-theme='dark'] .totp-qr svg,
+:root[data-theme='dark'] .totp-qr img {
+  background: #ffffff;
+  border-radius: 8px;
+}

webapp/src/styles/forms.css

@@ -0,0 +1,309 @@
+.muted {
+  margin: 0 0 16px 0;
+  text-align: center;
+  color: var(--muted);
+  line-height: 1.65;
+}
+
+.field {
+  display: block;
+  margin-bottom: 14px;
+}
+
+.field > span {
+  display: block;
+  margin-bottom: 8px;
+  font-size: 14px;
+  font-weight: 600;
+}
+
+.input {
+  width: 100%;
+  height: 48px;
+  border: 1px solid rgba(74, 103, 150, 0.42);
+  border-radius: 14px;
+  padding: 10px 14px;
+  font-size: 16px;
+  outline: none;
+  color: var(--text);
+  background: var(--panel);
+  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9);
+  transition:
+    border-color var(--dur-fast) var(--ease-smooth),
+    box-shadow var(--dur-fast) var(--ease-out-soft),
+    background-color var(--dur-fast) var(--ease-smooth),
+    transform var(--dur-fast) var(--ease-out-soft);
+}
+
+select.input {
+  appearance: none;
+  -webkit-appearance: none;
+  -moz-appearance: none;
+  padding-right: 42px;
+  background-image:
+    linear-gradient(45deg, transparent 50%, #365fa8 50%),
+    linear-gradient(135deg, #365fa8 50%, transparent 50%);
+  background-position:
+    calc(100% - 18px) calc(50% - 3px),
+    calc(100% - 12px) calc(50% - 3px);
+  background-size: 6px 6px, 6px 6px;
+  background-repeat: no-repeat;
+}
+
+input[type='file'].input {
+  height: auto;
+  min-height: 48px;
+  padding: 8px 10px;
+  font-size: 14px;
+  line-height: 1.4;
+}
+
+input[type='file'].input::file-selector-button {
+  height: 32px;
+  border: 1px solid #3f5b9e;
+  border-radius: 999px;
+  padding: 0 12px;
+  background: #eef4ff;
+  color: #1f4ea0;
+  font-weight: 700;
+  cursor: pointer;
+  margin-right: 10px;
+}
+
+input[type='file'].input::file-selector-button:hover {
+  background: #dfeaff;
+  border-color: #2f5fd8;
+}
+
+.textarea {
+  min-height: 110px;
+  height: auto;
+  resize: vertical;
+}
+
+.input:focus {
+  border-color: rgba(43, 102, 217, 0.6);
+  background-color: #fbfdff;
+  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.11), 0 10px 20px rgba(37, 99, 235, 0.08), inset 0 1px 0 rgba(255, 255, 255, 0.95);
+  transform: translateY(-1px);
+}
+
+.input-readonly {
+  background: #eef2f7;
+  color: #475569;
+}
+
+.input:disabled {
+  background: #e2e8f0;
+  border-color: #cbd5e1;
+  color: #94a3b8;
+  cursor: not-allowed;
+}
+
+.password-wrap {
+  position: relative;
+}
+
+.password-wrap .input {
+  padding-right: 44px;
+}
+
+.password-toggle {
+  position: absolute;
+  right: 8px;
+  top: 50%;
+  transform: translateY(-50%);
+  border: none;
+  background: transparent;
+  color: #275ac2;
+  cursor: pointer;
+  display: grid;
+  place-items: center;
+  transition: color var(--dur-fast) var(--ease-smooth), transform var(--dur-fast) var(--ease-out-soft);
+}
+
+.eye-btn {
+  position: absolute;
+  right: 10px;
+  bottom: 9px;
+  width: 30px;
+  height: 30px;
+  border: none;
+  background: transparent;
+  cursor: pointer;
+  display: grid;
+  place-items: center;
+  color: #334155;
+  transition: color var(--dur-fast) var(--ease-smooth), transform var(--dur-fast) var(--ease-out-soft);
+}
+
+.password-toggle:hover,
+.eye-btn:hover {
+  color: var(--primary);
+  transform: translateY(-1px) scale(1.04);
+}
+
+.btn {
+  height: 36px;
+  border: 1px solid transparent;
+  border-radius: 999px;
+  padding: 0 16px;
+  font-size: 15px;
+  font-weight: 700;
+  cursor: pointer;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  gap: 6px;
+  text-decoration: none;
+  transition:
+    transform var(--dur-fast) var(--ease-out-soft),
+    box-shadow var(--dur-fast) var(--ease-out-soft),
+    background-color var(--dur-fast) var(--ease-smooth),
+    border-color var(--dur-fast) var(--ease-smooth),
+    color var(--dur-fast) var(--ease-smooth),
+    opacity var(--dur-fast) var(--ease-smooth);
+}
+
+.topbar-actions .btn,
+.user-chip,
+.side-link,
+.mobile-tab {
+  --mag-x: 0px;
+  --mag-y: 0px;
+  position: relative;
+  overflow: hidden;
+}
+
+.topbar-actions .btn::before,
+.user-chip::before,
+.side-link::before,
+.mobile-tab::before {
+  content: '';
+  position: absolute;
+  left: var(--mx, 50%);
+  top: var(--my, 50%);
+  width: 110px;
+  height: 110px;
+  border-radius: 999px;
+  background: radial-gradient(circle, rgba(255, 255, 255, 0.36), rgba(255, 255, 255, 0.08) 42%, transparent 72%);
+  transform: translate(-50%, -50%) scale(0.68);
+  opacity: 0;
+  pointer-events: none;
+  transition:
+    opacity var(--dur-fast) var(--ease-smooth),
+    transform var(--dur-medium) var(--ease-out-soft);
+}
+
+.topbar-actions .btn:hover::before,
+.user-chip:hover::before,
+.side-link:hover::before,
+.mobile-tab:hover::before {
+  opacity: 1;
+  transform: translate(-50%, -50%) scale(1);
+}
+
+.btn:hover:not(:disabled) {
+  transform: translateY(-2px) scale(1.01);
+}
+
+.btn:active:not(:disabled) {
+  transform: translateY(0) scale(0.985);
+}
+
+.btn-icon {
+  flex-shrink: 0;
+}
+
+.btn.full {
+  width: 100%;
+  height: 50px;
+  font-size: 22px;
+  margin: 10px 0;
+}
+
+.btn-primary {
+  background: linear-gradient(135deg, #2563eb, #3b82f6 72%);
+  border-color: rgba(15, 63, 152, 0.32);
+  color: #fff;
+  box-shadow: 0 14px 28px rgba(37, 99, 235, 0.24);
+}
+
+.btn-primary:hover {
+  background: linear-gradient(135deg, #1d4ed8, #3377f0 72%);
+  border-color: rgba(15, 63, 152, 0.38);
+  box-shadow: 0 18px 34px rgba(37, 99, 235, 0.28);
+}
+
+.btn-secondary {
+  background: var(--panel);
+  border-color: rgba(37, 99, 235, 0.22);
+  color: var(--primary-strong);
+  box-shadow: 0 8px 18px rgba(13, 31, 68, 0.05);
+}
+
+.btn-secondary:hover {
+  background: #f4f8ff;
+  border-color: rgba(37, 99, 235, 0.34);
+}
+
+.btn-danger {
+  background: rgba(255, 255, 255, 0.8);
+  border-color: rgba(217, 45, 87, 0.28);
+  color: var(--danger);
+}
+
+.btn-danger:hover {
+  background: rgba(255, 241, 242, 0.96);
+  border-color: rgba(217, 45, 87, 0.38);
+}
+
+.btn:disabled {
+  background: #e2e8f0;
+  border-color: #cbd5e1;
+  color: #94a3b8;
+  cursor: not-allowed;
+}
+
+.or {
+  text-align: center;
+  margin: 10px 0;
+  color: #334155;
+}
+
+.field-help {
+  margin-top: 8px;
+  font-size: 13px;
+  line-height: 1.5;
+  color: #667085;
+}
+
+.auth-support-row {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 10px;
+  margin: -2px 0 12px;
+}
+
+.auth-link-btn {
+  border: none;
+  background: transparent;
+  padding: 0;
+  color: #1d4ed8;
+  font-size: 13px;
+  font-weight: 700;
+  cursor: pointer;
+  transition: color var(--dur-fast) var(--ease-smooth), transform var(--dur-fast) var(--ease-out-soft), opacity var(--dur-fast) var(--ease-smooth);
+}
+
+.auth-link-btn:hover {
+  text-decoration: underline;
+  transform: translateX(2px);
+}
+
+.auth-link-btn:disabled {
+  color: #94a3b8;
+  cursor: not-allowed;
+  text-decoration: none;
+}

webapp/src/styles/motion.css

@@ -0,0 +1,127 @@
+@keyframes toast-life {
+  from {
+    transform: scaleX(1);
+    transform-origin: left center;
+  }
+  to {
+    transform: scaleX(0);
+    transform-origin: left center;
+  }
+}
+
+@keyframes fade-in {
+  from {
+    opacity: 0;
+  }
+  to {
+    opacity: 1;
+  }
+}
+
+@keyframes fade-in-up {
+  from {
+    opacity: 0;
+    transform: translate3d(0, 16px, 0);
+  }
+  to {
+    opacity: 1;
+    transform: translate3d(0, 0, 0);
+  }
+}
+
+@keyframes shell-enter {
+  from {
+    opacity: 0;
+    transform: translate3d(0, 18px, 0) scale(0.992);
+  }
+  to {
+    opacity: 1;
+    transform: translate3d(0, 0, 0) scale(1);
+  }
+}
+
+@keyframes surface-enter {
+  from {
+    opacity: 0;
+    transform: translate3d(0, 20px, 0) scale(0.985);
+  }
+  to {
+    opacity: 1;
+    transform: translate3d(0, 0, 0) scale(1);
+  }
+}
+
+@keyframes menu-in {
+  from {
+    opacity: 0;
+    transform: translate3d(0, 10px, 0) scale(0.96);
+  }
+  to {
+    opacity: 1;
+    transform: translate3d(0, 0, 0) scale(1);
+  }
+}
+
+@keyframes dialog-in {
+  from {
+    opacity: 0;
+    transform: translate3d(0, 18px, 0) scale(0.96);
+  }
+  to {
+    opacity: 1;
+    transform: translate3d(0, 0, 0) scale(1);
+  }
+}
+
+@keyframes toast-in {
+  from {
+    opacity: 0;
+    transform: translate3d(18px, 0, 0) scale(0.97);
+  }
+  to {
+    opacity: 1;
+    transform: translate3d(0, 0, 0) scale(1);
+  }
+}
+
+@keyframes stagger-rise {
+  from {
+    opacity: 0;
+    transform: translate3d(0, 18px, 0) scale(0.985);
+  }
+  to {
+    opacity: 1;
+    transform: translate3d(0, 0, 0) scale(1);
+  }
+}
+
+@keyframes fade-out {
+  from {
+    opacity: 1;
+  }
+  to {
+    opacity: 0;
+  }
+}
+
+@keyframes dialog-out {
+  from {
+    opacity: 1;
+    transform: translate3d(0, 0, 0) scale(1);
+  }
+  to {
+    opacity: 0;
+    transform: translate3d(0, 10px, 0) scale(0.972);
+  }
+}
+
+@keyframes route-stage-in {
+  from {
+    opacity: 0;
+    transform: translate3d(0, 14px, 0);
+  }
+  to {
+    opacity: 1;
+    transform: translate3d(0, 0, 0);
+  }
+}

webapp/src/styles/overlays.css

@@ -0,0 +1,299 @@
+.dialog-mask {
+  position: fixed;
+  inset: 0;
+  width: 100vw;
+  height: 100dvh;
+  background: rgba(15, 23, 42, 0.5);
+  display: grid;
+  place-items: center;
+  z-index: 1200;
+  padding: 20px;
+  opacity: 0;
+  animation: fade-in var(--dur-medium) var(--ease-smooth) both;
+  backdrop-filter: blur(6px);
+  -webkit-backdrop-filter: blur(6px);
+}
+
+.dialog-card {
+  width: min(460px, 100%);
+  background: #fff;
+  border-radius: 20px;
+  border: 1px solid var(--line);
+  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.2);
+  padding: 20px;
+  text-align: center;
+  transform-origin: 50% 30%;
+  animation: dialog-in 240ms var(--ease-out-strong) both;
+}
+
+.dialog-mask.warning {
+  background:
+    radial-gradient(circle at top, rgba(255, 237, 213, 0.32), transparent 34%),
+    linear-gradient(180deg, rgba(127, 29, 29, 0.36), rgba(15, 23, 42, 0.72));
+  backdrop-filter: blur(10px);
+  -webkit-backdrop-filter: blur(10px);
+}
+
+.dialog-card.warning {
+  width: min(520px, 100%);
+  border: 1px solid rgba(220, 38, 38, 0.22);
+  background:
+    linear-gradient(180deg, rgba(255, 246, 246, 0.98), rgba(255, 255, 255, 0.99));
+  box-shadow:
+    0 36px 90px rgba(69, 10, 10, 0.28),
+    0 0 0 1px rgba(255, 255, 255, 0.7) inset;
+}
+
+.dialog-warning-head {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 12px;
+  margin-bottom: 8px;
+}
+
+.dialog-warning-badge {
+  width: 48px;
+  height: 48px;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  border-radius: 16px;
+  background: linear-gradient(180deg, #fff1f2, #ffe4e6);
+  color: #dc2626;
+  box-shadow:
+    0 12px 30px rgba(220, 38, 38, 0.18),
+    0 0 0 1px rgba(220, 38, 38, 0.08) inset;
+}
+
+.dialog-warning-kicker {
+  font-size: 12px;
+  font-weight: 800;
+  letter-spacing: 0.16em;
+  text-transform: uppercase;
+  color: #b91c1c;
+}
+
+.dialog-mask.closing {
+  animation: fade-out 220ms var(--ease-smooth) both;
+}
+
+.dialog-card.closing {
+  animation: dialog-out 220ms var(--ease-smooth) both;
+}
+
+.dialog-card .field {
+  text-align: left;
+}
+
+.dialog-title {
+  margin: 6px 0;
+  font-size: 30px;
+}
+
+.dialog-message {
+  color: #475467;
+  margin-bottom: 10px;
+}
+
+.dialog-card.warning .dialog-title {
+  color: #7f1d1d;
+  margin-bottom: 10px;
+}
+
+.dialog-message.warning {
+  margin-bottom: 16px;
+  padding: 14px 16px;
+  border-radius: 16px;
+  border: 1px solid rgba(220, 38, 38, 0.16);
+  background: linear-gradient(180deg, rgba(255, 241, 242, 0.94), rgba(255, 247, 237, 0.9));
+  color: #7a2832;
+  line-height: 1.65;
+  box-shadow: 0 10px 28px rgba(248, 113, 113, 0.08) inset;
+}
+
+.dialog-btn {
+  width: 100%;
+  height: 50px;
+  font-size: 20px;
+  margin-top: 8px;
+}
+
+.dialog-extra {
+  margin-top: 8px;
+}
+
+.dialog-divider {
+  height: 1px;
+  background: var(--line);
+  margin: 8px 0 10px;
+}
+
+.import-summary-dialog {
+  max-width: 520px;
+  text-align: left;
+  position: relative;
+  padding-top: 16px;
+}
+
+.import-summary-close {
+  position: absolute;
+  top: 10px;
+  right: 10px;
+  border: none;
+  background: transparent;
+  color: #64748b;
+  font-size: 24px;
+  line-height: 1;
+  cursor: pointer;
+}
+
+.import-summary-close:hover {
+  color: #0f172a;
+}
+
+.import-summary-table-wrap {
+  margin-top: 8px;
+  border: 1px solid var(--line);
+  border-radius: 10px;
+  overflow: hidden;
+}
+
+.import-summary-table {
+  width: 100%;
+  border-collapse: collapse;
+  font-size: 14px;
+}
+
+.import-summary-table th,
+.import-summary-table td {
+  padding: 10px 12px;
+  border-bottom: 1px solid var(--line);
+}
+
+.import-summary-table th {
+  text-align: left;
+  color: #475467;
+  background: #f8fafc;
+}
+
+.import-summary-table td:last-child,
+.import-summary-table th:last-child {
+  text-align: right;
+  width: 96px;
+}
+
+.import-summary-table tbody tr:last-child td {
+  border-bottom: none;
+}
+
+.import-summary-failed-list {
+  margin-top: 10px;
+  padding: 10px 12px;
+  border: 1px solid #fecaca;
+  border-radius: 10px;
+  background: #fef2f2;
+  color: #991b1b;
+  font-size: 13px;
+}
+
+.import-summary-failed-title {
+  font-weight: 700;
+  margin-bottom: 6px;
+}
+
+.import-summary-failed-list ul {
+  margin: 0;
+  padding-left: 18px;
+}
+
+.import-summary-failed-list li + li {
+  margin-top: 4px;
+}
+
+.settings-twofactor-grid {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 12px;
+}
+
+.settings-subcard {
+  border: 1px solid var(--line);
+  border-radius: 12px;
+  padding: 12px;
+  background: #fff;
+}
+
+.settings-subcard h3 {
+  margin-top: 0;
+  margin-bottom: 10px;
+}
+
+.toast-stack {
+  position: fixed;
+  top: 16px;
+  right: 16px;
+  z-index: 1400;
+  width: min(420px, calc(100vw - 20px));
+  list-style: none;
+  margin: 0;
+  padding: 0;
+  display: grid;
+  gap: 10px;
+}
+
+.toast-item {
+  position: relative;
+  border-radius: 10px;
+  border: 1px solid #bbdfc6;
+  background: #dff4e5;
+  color: #0f5132;
+  padding: 12px 14px;
+  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.12);
+  overflow: hidden;
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  animation: toast-in 240ms var(--ease-out-strong) both;
+}
+
+.toast-item.error {
+  border-color: #f2b8c1;
+  background: #fde7eb;
+  color: #9f1239;
+}
+
+.toast-item.warning {
+  border-color: #f2b8c1;
+  background: #fde7eb;
+  color: #9f1239;
+}
+
+.toast-text {
+  font-weight: 700;
+  padding-right: 10px;
+}
+
+.toast-close {
+  border: none;
+  background: transparent;
+  cursor: pointer;
+  font-size: 20px;
+  color: inherit;
+  transition: transform var(--dur-fast) var(--ease-out-soft), opacity var(--dur-fast) var(--ease-smooth);
+}
+
+.toast-close:hover {
+  transform: scale(1.08);
+  opacity: 0.84;
+}
+
+.toast-progress {
+  position: absolute;
+  left: 0;
+  bottom: 0;
+  width: 100%;
+  height: 3px;
+  background: rgba(15, 23, 42, 0.2);
+  animation: toast-life 4.5s linear forwards;
+}

webapp/src/styles/reduced-motion.css

@@ -0,0 +1,32 @@
+@media (prefers-reduced-motion: reduce) {
+  html {
+    scroll-behavior: auto;
+  }
+
+  *,
+  *::before,
+  *::after {
+    animation-duration: 1ms !important;
+    animation-iteration-count: 1 !important;
+    transition-duration: 1ms !important;
+    scroll-behavior: auto !important;
+  }
+
+  .btn:hover:not(:disabled),
+  .btn:active:not(:disabled),
+  .side-link:hover,
+  .tree-btn:hover,
+  .list-item:hover,
+  .list-item.active,
+  .search-input:focus,
+  .input:focus,
+  .password-toggle:hover,
+  .eye-btn:hover,
+  .auth-link-btn:hover,
+  .sort-menu-item:hover,
+  .create-menu-item:hover,
+  .toast-close:hover,
+  .mobile-sidebar-close:hover {
+    transform: none !important;
+  }
+}

webapp/src/styles/responsive.css

@@ -0,0 +1,790 @@
+@media (max-width: 1180px) {
+  .app-page {
+    padding: 8px;
+  }
+
+  .app-shell {
+    height: calc(100vh - 16px);
+    border-radius: 12px;
+  }
+
+  .app-main {
+    grid-template-columns: 1fr;
+  }
+
+  .app-side {
+    border-right: none;
+    border-bottom: 1px solid #d9e0ea;
+    display: grid;
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+    align-items: start;
+    align-self: start;
+    height: fit-content;
+    gap: 8px;
+  }
+
+  .app-side > .side-link {
+    min-height: 0;
+  }
+
+  .vault-grid {
+    grid-template-columns: 1fr;
+    height: auto;
+  }
+  .sidebar {
+    max-height: 280px;
+  }
+  .totp-grid,
+  .field-grid {
+    grid-template-columns: 1fr;
+  }
+
+  .totp-copy-btn {
+    justify-self: start;
+  }
+
+  .import-export-panels,
+  .backup-browser-row {
+    grid-template-columns: 1fr;
+  }
+
+  .settings-twofactor-grid {
+    grid-template-columns: 1fr;
+  }
+
+  .standalone-title {
+    font-size: 24px;
+  }
+
+  .standalone-footer {
+    font-size: 12px;
+    line-height: 1.4;
+  }
+}
+
+@media (max-width: 900px) {
+  .auth-page {
+    padding: 14px;
+    align-items: start;
+  }
+
+  .standalone-shell {
+    width: 100%;
+    max-width: 460px;
+    gap: 10px;
+    padding-top: 12px;
+  }
+
+  .standalone-brand-outside {
+    justify-content: flex-start;
+  }
+
+  .standalone-brand-logo {
+    width: 44px;
+    height: 44px;
+  }
+
+  .auth-card {
+    padding: 20px 16px;
+    border-radius: 18px;
+  }
+
+  .btn.full {
+    height: 48px;
+    font-size: 18px;
+  }
+
+  .auth-support-row {
+    align-items: center;
+    flex-direction: row;
+  }
+
+  .app-page {
+    padding: 0;
+    background: transparent;
+  }
+
+  .app-shell {
+    --mobile-topbar-height: 58px;
+    --mobile-tabbar-height: 70px;
+    height: 100dvh;
+    max-width: none;
+    border: none;
+    border-radius: 0;
+    box-shadow: none;
+  }
+
+  .topbar {
+    height: var(--mobile-topbar-height);
+    padding: 0 12px;
+    position: relative;
+    z-index: 20;
+  }
+
+  .brand {
+    min-width: 0;
+    gap: 10px;
+    font-size: 18px;
+  }
+
+  .brand-logo {
+    width: 34px;
+    height: 34px;
+  }
+
+  .mobile-page-title {
+    display: inline;
+  }
+
+  .topbar-actions .user-chip,
+  .topbar-actions > .btn:not(.mobile-sidebar-toggle):not(.mobile-lock-btn),
+  .topbar-actions > .theme-switch-wrap {
+    display: none;
+  }
+
+  .mobile-sidebar-toggle,
+  .mobile-lock-btn {
+    display: inline-flex;
+    width: 36px;
+    min-width: 36px;
+    height: 36px;
+    padding: 0;
+    justify-content: center;
+    font-size: 0;
+    gap: 0;
+  }
+
+  .mobile-sidebar-toggle .btn-icon,
+  .mobile-lock-btn .btn-icon {
+    margin: 0;
+  }
+
+  .mobile-theme-btn {
+    display: inline-flex;
+    align-items: center;
+  }
+
+  .mobile-theme-btn .theme-switch {
+    transform: scale(0.8);
+    transform-origin: center;
+  }
+
+  .app-main {
+    display: flex;
+    flex-direction: column;
+    min-height: 0;
+  }
+
+  .app-side {
+    display: none;
+  }
+
+  .content {
+    flex: 1;
+    min-height: 0;
+    -webkit-overflow-scrolling: touch;
+  }
+
+  .mobile-tabbar {
+    display: grid;
+    grid-template-columns: repeat(4, minmax(0, 1fr));
+    align-items: center;
+    gap: 6px;
+    min-height: var(--mobile-tabbar-height);
+    padding: 8px 10px calc(8px + env(safe-area-inset-bottom));
+    border-top: 1px solid var(--line);
+    background: rgba(248, 251, 255, 0.92);
+  }
+
+  .mobile-tab {
+    display: grid;
+    justify-items: center;
+    gap: 4px;
+    color: #64748b;
+    text-decoration: none;
+    font-size: 11px;
+    font-weight: 700;
+    padding: 6px 4px;
+    border-radius: 12px;
+    transition:
+      transform 220ms var(--ease-out-soft),
+      background-color var(--dur-fast) var(--ease-smooth),
+      color var(--dur-fast) var(--ease-smooth);
+  }
+
+  .mobile-tab:hover {
+    transform: translate3d(var(--mag-x), calc(var(--mag-y) - 1px), 0);
+  }
+
+  .mobile-tab.active {
+    color: var(--primary-strong);
+    background: linear-gradient(135deg, rgba(37, 99, 235, 0.16), rgba(59, 130, 246, 0.08));
+    box-shadow: 0 8px 18px rgba(37, 99, 235, 0.08);
+  }
+
+  .vault-grid {
+    gap: 10px;
+    padding: 0;
+  }
+
+  .sidebar {
+    display: none;
+  }
+
+  .mobile-sidebar-sheet {
+    display: block;
+    position: fixed;
+    left: 10px;
+    right: 10px;
+    top: calc(var(--mobile-topbar-height) + 10px);
+    bottom: auto;
+    max-height: calc(100dvh - 145px);
+    z-index: 55;
+    overflow: auto;
+    border: 1px solid #d8dee8;
+    border-radius: 18px;
+    background: #fff;
+    padding: 12px;
+    box-shadow: 0 18px 40px rgba(15, 23, 42, 0.16);
+    opacity: 0;
+    visibility: hidden;
+    pointer-events: none;
+    transform: translate3d(0, 10px, 0) scale(0.98);
+    transition:
+      opacity 220ms var(--ease-smooth),
+      transform 240ms var(--ease-out-soft),
+      visibility 220ms var(--ease-smooth);
+  }
+
+  .mobile-sidebar-sheet.open {
+    opacity: 1;
+    visibility: visible;
+    pointer-events: auto;
+    transform: translate3d(0, 0, 0) scale(1);
+  }
+
+  .mobile-sidebar-head {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    gap: 10px;
+    margin-bottom: 10px;
+  }
+
+  .mobile-sidebar-title {
+    font-size: 16px;
+    font-weight: 800;
+    color: #0f172a;
+  }
+
+  .mobile-sidebar-close {
+    width: 34px;
+    height: 34px;
+    border: 1px solid #d7dde6;
+    border-radius: 999px;
+    background: #fff;
+    color: #0f172a;
+    display: inline-grid;
+    place-items: center;
+    cursor: pointer;
+    padding: 0;
+    transition:
+      transform var(--dur-fast) var(--ease-out-soft),
+      background-color var(--dur-fast) var(--ease-smooth),
+      border-color var(--dur-fast) var(--ease-smooth);
+  }
+
+  .mobile-sidebar-close:hover {
+    transform: scale(1.05);
+  }
+
+  .mobile-sidebar-sheet .sidebar-block {
+    margin: 0;
+    padding: 0;
+    border: none;
+    border-radius: 0;
+    background: transparent;
+    box-shadow: none;
+  }
+
+  .mobile-sidebar-sheet .tree-btn {
+    margin-bottom: 2px;
+  }
+
+  .mobile-sidebar-sheet .folder-row {
+    align-items: stretch;
+    gap: 4px;
+  }
+
+  .mobile-sidebar-sheet .folder-row .tree-btn {
+    min-height: 42px;
+  }
+
+  .mobile-sidebar-sheet .sidebar-title,
+  .mobile-sidebar-sheet .sidebar-title-row {
+    padding-bottom: 6px;
+    margin-bottom: 0;
+  }
+
+  .mobile-sidebar-sheet .tree-btn {
+    padding-left: 8px;
+    padding-right: 8px;
+    border-radius: 10px;
+  }
+
+  .mobile-sidebar-sheet .tree-btn.active {
+    background: #eef4ff;
+  }
+
+  .mobile-sidebar-sheet .folder-delete-btn {
+    width: 28px;
+    height: 42px;
+    border-radius: 8px;
+  }
+
+  .list-col {
+    max-width: none;
+  }
+
+  .list-head {
+    display: grid;
+    grid-template-columns: minmax(0, 1fr) auto auto auto;
+    gap: 8px;
+    align-items: center;
+  }
+
+  .list-count {
+    grid-column: auto;
+    width: auto;
+    font-size: 12px;
+    white-space: nowrap;
+  }
+
+  .list-head .search-input-wrap {
+    width: 100%;
+    min-width: 0;
+  }
+
+  .list-head .search-input {
+    width: 100%;
+    min-width: 0;
+    height: 42px;
+    border-radius: 14px;
+  }
+
+  .list-icon-btn {
+    width: auto;
+    min-width: 0;
+    padding: 0 12px;
+    font-size: 13px;
+    gap: 6px;
+    white-space: nowrap;
+  }
+
+  .toolbar.actions {
+    justify-content: flex-end;
+    flex-wrap: unset;
+    gap: var(--actions-gap);
+    overflow: visible;
+    padding-bottom: 2px;
+  }
+
+  .actions {
+    gap: var(--actions-gap);
+  }
+
+  .toolbar.actions .btn.small {
+    width: auto;
+    min-width: 0;
+    height: 34px;
+    padding: 0 12px;
+    font-size: 13px;
+    gap: 6px;
+    border-radius: 999px;
+    white-space: nowrap;
+  }
+
+  .mobile-fab-wrap {
+    position: fixed;
+    right: 14px;
+    bottom: calc(14px + var(--mobile-tabbar-height) + env(safe-area-inset-bottom));
+    z-index: 45;
+  }
+
+  .mobile-fab-trigger {
+    width: 36px;
+    height: 56px;
+    padding: 0;
+    border-radius: 999px;
+    font-size: 0;
+    gap: 0;
+    box-shadow: 0 14px 30px rgba(37, 99, 235, 0.28);
+  }
+
+  .mobile-fab-trigger .btn-icon {
+    margin: 0;
+    width: 20px;
+    height: 20px;
+  }
+
+  .mobile-fab-wrap .create-menu {
+    left: auto;
+    right: 0;
+    top: auto;
+    bottom: calc(100% + 10px);
+  }
+
+  .list-panel {
+    border-radius: 16px;
+    overflow: visible;
+  }
+
+  .list-item {
+    padding: 12px;
+    border-radius: 14px;
+  }
+
+  .row-check {
+    width: 18px;
+    height: 18px;
+  }
+
+  .vault-grid.mobile-panel-detail .sidebar,
+  .vault-grid.mobile-panel-detail .list-col,
+  .vault-grid.mobile-panel-edit .sidebar,
+  .vault-grid.mobile-panel-edit .list-col {
+    display: none;
+  }
+
+  .mobile-detail-sheet {
+    display: block;
+    position: fixed;
+    left: 0;
+    right: 0;
+    top: calc(var(--mobile-topbar-height) + env(safe-area-inset-top));
+    bottom: calc(var(--mobile-tabbar-height) + env(safe-area-inset-bottom));
+    z-index: 35;
+    overflow: auto;
+    background: transparent;
+    padding: 0 0 18px;
+    opacity: 0;
+    visibility: hidden;
+    pointer-events: none;
+    transform: translate3d(0, 18px, 0);
+    transition:
+      opacity 220ms var(--ease-smooth),
+      transform 260ms var(--ease-out-soft),
+      visibility 220ms var(--ease-smooth);
+  }
+
+  .mobile-detail-sheet.open {
+    opacity: 1;
+    visibility: visible;
+    pointer-events: auto;
+    transform: translate3d(0, 0, 0);
+  }
+
+  .mobile-panel-head {
+    display: flex;
+    align-items: center;
+    margin: 0 10px 10px;
+  }
+
+  .mobile-panel-back {
+    min-height: 40px;
+  }
+
+  .mobile-detail-sheet > .detail-switch-stage,
+  .mobile-detail-sheet > .card,
+  .mobile-detail-sheet > .empty {
+    margin-left: 10px;
+    margin-right: 10px;
+  }
+
+  .detail-col .card,
+  .import-export-panel,
+  .settings-subcard {
+    border-radius: 16px;
+  }
+
+  .card {
+    padding: 14px 14px;
+  }
+
+  .section-head {
+    align-items: flex-start;
+    gap: 10px;
+    flex-direction: column;
+  }
+
+  .detail-actions {
+    flex-direction: column;
+    align-items: stretch;
+    gap: 10px;
+  }
+
+  .detail-actions .actions {
+    width: 100%;
+  }
+
+  .detail-actions .actions .btn,
+  .detail-delete-btn {
+    width: 100%;
+  }
+
+  .kv-row {
+    grid-template-columns: minmax(64px, 80px) minmax(0, 1fr) auto;
+    align-items: center;
+  }
+
+  .kv-line {
+    flex-direction: row;
+    align-items: center;
+    justify-content: space-between;
+  }
+
+  .kv-actions {
+    width: auto;
+    justify-content: flex-end;
+    flex-wrap: nowrap;
+  }
+
+  .kv-actions .btn.small {
+    width: 34px;
+    min-width: 34px;
+    height: 34px;
+    padding: 0;
+    font-size: 0;
+    gap: 0;
+    border-radius: 999px;
+  }
+
+  .kv-actions .btn.small .btn-icon {
+    margin: 0;
+  }
+
+  .import-export-panels,
+  .settings-twofactor-grid {
+    gap: 10px;
+  }
+
+  .import-export-panel .actions .btn,
+  .settings-subcard .actions .btn,
+  .section-head .actions .btn {
+    width: 100%;
+  }
+
+  .totp-grid {
+    gap: 10px;
+  }
+
+  .totp-qr {
+    min-height: 180px;
+  }
+
+  .totp-qr svg,
+  .totp-qr img {
+    width: 160px;
+    height: 160px;
+  }
+
+  .invite-toolbar {
+    align-items: stretch;
+  }
+
+  .mobile-settings-card {
+    min-height: calc(100dvh - 170px);
+    display: flex;
+    flex-direction: column;
+    gap: 12px;
+  }
+
+  .mobile-settings-subhead {
+    display: flex;
+    align-items: center;
+  }
+
+  .mobile-settings-back {
+    min-height: 38px;
+  }
+
+  .mobile-settings-links {
+    display: grid;
+    gap: 8px;
+    align-content: start;
+  }
+
+  .mobile-settings-link {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    min-height: 46px;
+    padding: 0 12px;
+    border: 1px solid #dbe2ec;
+    border-radius: 14px;
+    background: #f8fafc;
+    color: #0f172a;
+    text-decoration: none;
+    font-weight: 700;
+  }
+
+  .mobile-settings-link.active {
+    background: #e8f0ff;
+    border-color: #b9cff6;
+    color: #175ddc;
+  }
+
+  .mobile-settings-logout {
+    width: 100%;
+    margin-top: auto;
+  }
+
+  .stack,
+  .import-export-page,
+  .totp-codes-page,
+  .detail-col {
+    min-height: auto;
+  }
+
+  .invite-create-group {
+    align-items: stretch;
+    width: 100%;
+  }
+
+  .input.small {
+    width: 100%;
+  }
+
+  .table,
+  .table tbody,
+  .table tr,
+  .table td {
+    display: block;
+    width: 100%;
+  }
+
+  .table thead {
+    display: none;
+  }
+
+  .table tr {
+    border: 1px solid var(--line);
+    border-radius: 14px;
+    background: #fff;
+    padding: 10px 12px;
+    margin-bottom: 10px;
+  }
+
+  .table td {
+    border-bottom: 1px solid #edf1f6;
+    padding: 10px 0;
+  }
+
+  .table td:last-child {
+    border-bottom: none;
+    padding-bottom: 0;
+  }
+
+  .table td::before {
+    display: block;
+    content: attr(data-label);
+    margin-bottom: 4px;
+    color: #64748b;
+    font-size: 12px;
+    font-weight: 700;
+  }
+
+  .dialog-mask {
+    align-items: center;
+    justify-items: center;
+    padding: 16px;
+  }
+
+  .dialog-card {
+    width: 90%;
+    max-width: 460px;
+    max-height: calc(100dvh - 10px);
+    overflow: auto;
+    border-radius: 22px;
+    padding: 18px 16px calc(18px + env(safe-area-inset-bottom));
+  }
+
+  .dialog-card.warning {
+    max-width: 520px;
+  }
+
+  .dialog-warning-strip {
+    margin: -18px -16px 16px;
+  }
+
+  .dialog-title {
+    font-size: 24px;
+  }
+
+  .dialog-btn {
+    height: 46px;
+    font-size: 16px;
+  }
+
+.toast-stack {
+  top: 10px;
+  left: 10px;
+  right: 10px;
+  width: auto;
+}
+}
+
+@media (max-width: 900px) {
+  .backup-grid {
+    grid-template-columns: 1fr;
+  }
+
+  .backup-operations-sidebar,
+  .backup-destination-sidebar {
+    position: static;
+  }
+}
+
+@media (max-width: 640px) {
+  .backup-interval-row {
+    grid-template-columns: 1fr;
+  }
+
+  .backup-browser-row,
+  .field-grid {
+    grid-template-columns: 1fr;
+  }
+
+  .backup-destination-top {
+    align-items: flex-start;
+    flex-direction: column;
+  }
+
+  .backup-add-chooser {
+    flex-direction: column;
+  }
+
+  .backup-name-row {
+    grid-template-columns: 1fr;
+  }
+
+  .backup-option-field {
+    align-items: flex-start;
+  }
+
+  .backup-help-bubble {
+    left: 0;
+    transform: translate(0, -4px);
+  }
+
+  .backup-help-bubble::before {
+    left: 16px;
+    transform: rotate(45deg);
+  }
+
+  .backup-help-wrap:hover .backup-help-bubble,
+  .backup-help-wrap:focus-within .backup-help-bubble,
+  .backup-help-wrap.open .backup-help-bubble {
+    transform: translate(0, 0);
+  }
+}

webapp/src/styles/shell.css

@@ -0,0 +1,321 @@
+.app-page {
+  min-height: 100%;
+  padding: 20px;
+  position: relative;
+  background: transparent;
+}
+
+.app-shell {
+  height: calc(100vh - 40px);
+  max-width: 1600px;
+  margin: 0 auto;
+  position: relative;
+  background: var(--panel-soft);
+  border: 1px solid var(--line);
+  border-radius: 28px;
+  box-shadow: var(--shadow-lg);
+  display: flex;
+  flex-direction: column;
+  overflow: hidden;
+  animation: shell-enter 560ms var(--ease-out-strong) both;
+}
+
+.topbar {
+  height: 58px;
+  border-bottom: 1px solid var(--line-soft);
+  color: #0f172a;
+  background: rgba(244, 248, 255, 0.72);
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 0 18px;
+  transition: background-color var(--dur-fast) var(--ease-smooth), border-color var(--dur-fast) var(--ease-smooth);
+}
+
+.brand {
+  display: inline-flex;
+  align-items: center;
+  gap: 8px;
+  font-size: 34px;
+  font-weight: 800;
+  color: var(--text);
+}
+
+.brand-wordmark {
+  display: block;
+  height: auto;
+  width: clamp(210px, 20vw, 290px);
+  max-width: 100%;
+  filter: drop-shadow(0 12px 24px rgba(43, 102, 217, 0.12));
+}
+
+.mobile-page-title {
+  display: none;
+  min-width: 0;
+  max-width: min(58vw, 240px);
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  font-size: 19px;
+  line-height: 1.2;
+  font-weight: 800;
+  color: #0f172a;
+}
+
+.brand-logo {
+  width: 42px;
+  height: 42px;
+  object-fit: contain;
+  filter: drop-shadow(0 10px 22px rgba(43, 102, 217, 0.22));
+  transition: transform var(--dur-medium) var(--ease-out-soft), filter var(--dur-medium) var(--ease-out-soft);
+}
+
+.topbar-actions {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+}
+
+.mobile-tabbar {
+  display: none;
+}
+
+.mobile-sidebar-toggle {
+  display: none;
+}
+
+.mobile-lock-btn {
+  display: none;
+}
+
+.mobile-theme-btn {
+  display: none;
+}
+
+.theme-switch-wrap {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.theme-switch {
+  position: relative;
+  display: inline-block;
+  width: 56px;
+  height: 32px;
+}
+
+.theme-switch-input {
+  opacity: 0;
+  width: 0;
+  height: 0;
+}
+
+.theme-switch-slider {
+  position: absolute;
+  cursor: pointer;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  background: linear-gradient(180deg, #dceaff, #c8dcff);
+  border: 1px solid #9dbbec;
+  transition:
+    background var(--dur-medium) var(--ease-out-soft),
+    border-color var(--dur-medium) var(--ease-smooth),
+    box-shadow var(--dur-fast) var(--ease-out-soft),
+    transform var(--dur-fast) var(--ease-out-soft);
+  border-radius: 999px;
+}
+
+.theme-switch-slider::before {
+  position: absolute;
+  content: '';
+  height: 26px;
+  width: 26px;
+  border-radius: 999px;
+  left: 2px;
+  bottom: 2px;
+  z-index: 2;
+  background: linear-gradient(180deg, #ffffff, #edf4ff);
+  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.14);
+  transition:
+    transform var(--dur-medium) var(--ease-out-strong),
+    box-shadow var(--dur-fast) var(--ease-out-soft),
+    background var(--dur-fast) var(--ease-smooth);
+}
+
+.theme-switch .sun svg {
+  position: absolute;
+  top: 6px;
+  left: 32px;
+  z-index: 1;
+  width: 18px;
+  height: 18px;
+  opacity: 0.95;
+  transition: transform var(--dur-medium) var(--ease-out-soft), opacity var(--dur-fast) var(--ease-smooth);
+}
+
+.theme-switch .moon svg {
+  fill: #5b86d6;
+  position: absolute;
+  top: 7px;
+  left: 7px;
+  z-index: 1;
+  width: 16px;
+  height: 16px;
+  opacity: 0.88;
+  transition: transform var(--dur-medium) var(--ease-out-soft), opacity var(--dur-fast) var(--ease-smooth);
+}
+
+.theme-switch-input:checked + .theme-switch-slider {
+  background: linear-gradient(180deg, #173150, #122742);
+  border-color: #35527a;
+}
+
+.theme-switch-input:focus + .theme-switch-slider {
+  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.22);
+}
+
+.theme-switch-input:checked + .theme-switch-slider::before {
+  transform: translateX(24px);
+}
+
+.theme-switch:hover .theme-switch-slider {
+  transform: scale(1.02);
+}
+
+.theme-switch:hover .sun svg,
+.theme-switch:hover .moon svg {
+  transform: scale(1.08);
+}
+
+.topbar-actions .btn {
+  height: 34px;
+  border-radius: 12px;
+  padding: 0 12px;
+  font-size: 13px;
+  font-weight: 600;
+  transform: translate3d(var(--mag-x), var(--mag-y), 0);
+  transition-duration: 220ms;
+}
+
+.topbar-actions .btn:hover:not(:disabled) {
+  transform: translate3d(var(--mag-x), calc(var(--mag-y) - 2px), 0) scale(1.02);
+}
+
+.user-chip {
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  height: 34px;
+  border-radius: 999px;
+  padding: 0 12px;
+  border: 1px solid rgba(148, 163, 184, 0.3);
+  background: rgba(249, 251, 255, 0.92);
+  color: var(--muted-strong);
+  font-size: 14px;
+  font-weight: 600;
+  box-shadow: 0 10px 18px rgba(13, 31, 68, 0.05);
+  transform: translate3d(var(--mag-x), var(--mag-y), 0);
+  transition:
+    transform 220ms var(--ease-out-soft),
+    box-shadow var(--dur-fast) var(--ease-out-soft),
+    border-color var(--dur-fast) var(--ease-smooth),
+    background-color var(--dur-fast) var(--ease-smooth);
+}
+
+.user-chip:hover {
+  transform: translate3d(var(--mag-x), calc(var(--mag-y) - 1px), 0);
+  box-shadow: 0 16px 28px rgba(15, 23, 42, 0.08);
+}
+
+.app-main {
+  flex: 1;
+  min-height: 0;
+  display: grid;
+  grid-template-columns: 200px 1fr;
+}
+
+.app-side {
+  border-right: 1px solid var(--line-soft);
+  padding: 16px 12px;
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.side-link {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding: 11px 12px;
+  border-radius: 14px;
+  color: var(--muted-strong);
+  text-decoration: none;
+  border: 1px solid transparent;
+  font-weight: 600;
+  font-size: 14px;
+  transition:
+    background-color var(--dur-fast) var(--ease-smooth),
+    border-color var(--dur-fast) var(--ease-smooth),
+    color var(--dur-fast) var(--ease-smooth),
+    transform var(--dur-fast) var(--ease-out-soft),
+    box-shadow var(--dur-fast) var(--ease-out-soft);
+}
+
+.side-link:hover {
+  background: #ffffff;
+  border-color: rgba(128, 152, 192, 0.18);
+  color: var(--text);
+  transform: translate3d(calc(var(--mag-x) + 3px), var(--mag-y), 0);
+  box-shadow: 0 14px 24px rgba(15, 23, 42, 0.05);
+}
+
+.side-link.active {
+  background: linear-gradient(135deg, rgba(37, 99, 235, 0.18), rgba(59, 130, 246, 0.08));
+  border-color: rgba(37, 99, 235, 0.28);
+  color: var(--primary-strong);
+  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.64), 0 10px 18px rgba(37, 99, 235, 0.1);
+}
+
+.content {
+  min-height: 0;
+  padding: 14px;
+  overflow: hidden;
+}
+
+.route-stage {
+  height: 100%;
+  min-height: 0;
+  overflow: auto;
+}
+
+@media (min-width: 901px) {
+  .route-stage {
+    animation: route-stage-in 240ms var(--ease-out-soft) both;
+  }
+}
+
+.mobile-sidebar-mask {
+  position: fixed;
+  inset: 0;
+  background: rgba(15, 23, 42, 0.36);
+  z-index: 54;
+  opacity: 0;
+  visibility: hidden;
+  pointer-events: none;
+  transition:
+    opacity 220ms var(--ease-smooth),
+    visibility 220ms var(--ease-smooth);
+}
+
+.mobile-sidebar-mask.open {
+  opacity: 1;
+  visibility: visible;
+  pointer-events: auto;
+}
+
+.mobile-sidebar-head {
+  display: none;
+}

webapp/src/styles/tokens.css

@@ -0,0 +1,46 @@
+:root {
+  --bg-accent: #e7edf8;
+  --panel: #f9fbff;
+  --panel-soft: #f2f6fd;
+  --panel-muted: #e8eff9;
+  --line: rgba(128, 152, 192, 0.32);
+  --line-soft: rgba(143, 167, 206, 0.18);
+  --text: #0b1730;
+  --muted: #60708b;
+  --muted-strong: #334765;
+  --primary: #2563eb;
+  --primary-hover: #1d4ed8;
+  --primary-strong: #0f3f98;
+  --danger: #d92d57;
+  --overlay-strong: rgba(15, 23, 42, 0.56);
+  --shadow-sm: 0 10px 22px rgba(13, 31, 68, 0.045);
+  --shadow-md: 0 22px 48px rgba(13, 31, 68, 0.08);
+  --shadow-lg: 0 28px 76px rgba(13, 31, 68, 0.11);
+  --ease-out-strong: cubic-bezier(0.22, 1, 0.36, 1);
+  --ease-out-soft: cubic-bezier(0.24, 0.8, 0.32, 1);
+  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
+  --dur-fast: 180ms;
+  --dur-medium: 240ms;
+  --dur-panel: 280ms;
+  --actions-gap: clamp(0px, calc((100vw - 520px) * 1), 10px);
+}
+
+:root[data-theme='dark'] {
+  --bg-accent: #06111d;
+  --panel: #0d192b;
+  --panel-soft: #112136;
+  --panel-muted: #0a1626;
+  --line: rgba(108, 141, 190, 0.28);
+  --line-soft: rgba(120, 152, 198, 0.16);
+  --text: #edf4ff;
+  --muted: #8fa6c6;
+  --muted-strong: #c3d5ef;
+  --primary: #84b6ff;
+  --primary-hover: #a6ccff;
+  --primary-strong: #f3f8ff;
+  --danger: #ff8ba8;
+  --overlay-strong: rgba(2, 8, 20, 0.84);
+  --shadow-sm: 0 14px 28px rgba(1, 7, 18, 0.24);
+  --shadow-md: 0 24px 52px rgba(1, 7, 18, 0.36);
+  --shadow-lg: 0 34px 88px rgba(1, 7, 18, 0.46);
+}