diff --git a/shine-UI/index.html b/shine-UI/index.html
index db4c53ad..94c9d7b4 100644
--- a/shine-UI/index.html
+++ b/shine-UI/index.html
@@ -18,7 +18,7 @@ window.__SHINE_BUILD_HASH__ = '20260819190000';
     <script>
       (function attachStylesWithBuildHash() {
         const v = encodeURIComponent(window.__SHINE_BUILD_HASH__ || 'dev');
-        const cssFiles = ['./styles/main.css', './styles/layout.css', './styles/components.css', './styles/network-graph.css'];
+        const cssFiles = ['./styles/main.css', './styles/layout.css', './styles/components.css', './styles/network-graph.css', './styles/buttons-white.css'];
         cssFiles.forEach((file) => {
           const link = document.createElement('link');
           link.rel = 'stylesheet';
diff --git a/shine-UI/js/app.js b/shine-UI/js/app.js
index e3d3cbc0..dd2f55de 100644
--- a/shine-UI/js/app.js
+++ b/shine-UI/js/app.js
@@ -5,6 +5,7 @@ import {
   syncTrackedRouteHistory,
 } from './router.js';
 import { renderToolbar } from './components/toolbar.js';
+import { attachScrollToBottomButton } from './components/scroll-to-bottom-button.js';
 import { captureClientError, setClientErrorSentNotifier, setClientErrorTransport } from './services/client-error-reporter.js';
 import { initPwaInstallPromptHandling } from './services/pwa-install-service.js';
 import { initPwaPush } from './services/pwa-push-service.js';
@@ -190,6 +191,15 @@ let initialConnectionCompleted = false;
 let orientationLockInFlight = false;
 let currentChromeCleanup = null;
 const CALL_PUSH_PENDING_ACTION_KEY = 'shine-ui-call-push-pending-action-v1';
+const SCROLL_TO_BOTTOM_PAGE_IDS = new Set([
+  'messages-list',
+  'chat-view',
+  'channels-list',
+  'channel-view',
+  'channel-thread-view',
+  'notifications-view',
+]);
+
 const GUEST_ALLOWED_PAGES = new Set([
   'start-view',
   'entry-settings-view',
@@ -1128,6 +1138,14 @@ function renderPageFailureFallback(pageId, error) {
   refreshConnectionUi();
 }
 
+function attachPageScrollToBottom(pageId, screen) {
+  if (!SCROLL_TO_BOTTOM_PAGE_IDS.has(pageId)) return null;
+
+  return attachScrollToBottomButton({
+    scrollContainer: () => screen.querySelector('.dm-chat-wrap') || screenEl,
+  });
+}
+
 function renderApp() {
   syncTrackedRouteHistory(window.location.pathname || '/');
   const route = getRoute();
@@ -1164,7 +1182,12 @@ function renderApp() {
     }
 
     screenEl.append(screen);
-    currentCleanup = typeof screen.cleanup === 'function' ? screen.cleanup : null;
+    const pageCleanup = typeof screen.cleanup === 'function' ? screen.cleanup : null;
+    const scrollToBottomControl = attachPageScrollToBottom(pageId, screen);
+    currentCleanup = () => {
+      pageCleanup?.();
+      scrollToBottomControl?.cleanup();
+    };
 
     screenEl.classList.toggle('no-app-chrome', !showAppChrome);
     screenEl.classList.toggle('preauth-flow', PRE_AUTH_PAGES.includes(pageId));
diff --git a/shine-UI/js/components/scroll-to-bottom-button.js b/shine-UI/js/components/scroll-to-bottom-button.js
index cd2aea97..3470062c 100644
--- a/shine-UI/js/components/scroll-to-bottom-button.js
+++ b/shine-UI/js/components/scroll-to-bottom-button.js
@@ -30,6 +30,7 @@ export function attachScrollToBottomButton({
   button.className = 'scroll-to-bottom-btn';
   button.title = title;
   button.setAttribute('aria-label', 'Прокрутить ленту вниз');
+  button.tabIndex = -1;
   button.append(buildArrowIcon());
   target.append(button);
 
@@ -42,6 +43,7 @@ export function attachScrollToBottomButton({
   const hide = () => {
     button.classList.remove('is-visible');
     button.setAttribute('aria-hidden', 'true');
+    button.tabIndex = -1;
   };
 
   const scheduleRefresh = () => {
@@ -103,6 +105,7 @@ export function attachScrollToBottomButton({
 
     button.classList.toggle('is-visible', shouldShow);
     button.setAttribute('aria-hidden', shouldShow ? 'false' : 'true');
+    button.tabIndex = shouldShow ? 0 : -1;
   }
 
   const scrollToBottom = () => {
diff --git a/shine-UI/js/pages/channel-thread-view.js b/shine-UI/js/pages/channel-thread-view.js
index ae090faf..1357b0c2 100644
--- a/shine-UI/js/pages/channel-thread-view.js
+++ b/shine-UI/js/pages/channel-thread-view.js
@@ -1,5 +1,4 @@
 import { renderHeader } from '../components/header.js';
-import { attachScrollToBottomButton } from '../components/scroll-to-bottom-button.js';
 import { authService, getMessageReactionState, setMessageReactionState, state } from '../state.js';
 import { captureClientError } from '../services/client-error-reporter.js';
 import { toUserMessage } from '../services/ui-error-texts.js';
@@ -1144,7 +1143,6 @@ export function render({ navigate, route, chrome }) {
   screen.className = 'stack channels-screen channels-screen--thread';
   const appScreen = document.getElementById('app-screen');
   appScreen?.classList.add('channels-scroll-clean');
-  const scrollToBottomControl = attachScrollToBottomButton({ scrollContainer: appScreen });
 
   const header = renderHeader({
     title: '',
@@ -1356,7 +1354,6 @@ export function render({ navigate, route, chrome }) {
     invalid.textContent = 'Некорректный идентификатор треда в адресе страницы.';
     screen.append(invalid);
     screen.cleanup = () => {
-      scrollToBottomControl.cleanup();
       appScreen?.classList.remove('channels-scroll-clean');
     };
     return screen;
@@ -1545,7 +1542,6 @@ export function render({ navigate, route, chrome }) {
   })();
 
   screen.cleanup = () => {
-    scrollToBottomControl.cleanup();
     appScreen?.classList.remove('channels-scroll-clean');
   };
 
diff --git a/shine-UI/js/pages/channel-view.js b/shine-UI/js/pages/channel-view.js
index d2122b16..67af4259 100644
--- a/shine-UI/js/pages/channel-view.js
+++ b/shine-UI/js/pages/channel-view.js
@@ -1,5 +1,4 @@
 import { renderHeader } from '../components/header.js';
-import { attachScrollToBottomButton } from '../components/scroll-to-bottom-button.js';
 import {
   authService,
   getMessageReactionState,
@@ -2042,7 +2041,6 @@ export function render({ navigate, route, chrome }) {
   screen.className = 'stack channels-screen channels-screen--channel';
   const appScreen = document.getElementById('app-screen');
   appScreen?.classList.add('channels-scroll-clean');
-  const scrollToBottomControl = attachScrollToBottomButton({ scrollContainer: appScreen });
 
   const statusBox = document.createElement('div');
   statusBox.className = 'card status-line is-unavailable channels-status';
@@ -2488,7 +2486,6 @@ export function render({ navigate, route, chrome }) {
   })();
 
   screen.cleanup = () => {
-    scrollToBottomControl.cleanup();
     appScreen?.classList.remove('channels-scroll-clean');
     if (typeof cleanupSeenTracking === 'function') cleanupSeenTracking();
   };
diff --git a/shine-UI/js/pages/chat-view.js b/shine-UI/js/pages/chat-view.js
index d3f75775..bbd67bdb 100644
--- a/shine-UI/js/pages/chat-view.js
+++ b/shine-UI/js/pages/chat-view.js
@@ -1,5 +1,4 @@
 import { renderHeader } from '../components/header.js';
-import { attachScrollToBottomButton } from '../components/scroll-to-bottom-button.js';
 import { directMessages } from '../mock-data.js';
 import {
   addAppLogEntry,
@@ -907,10 +906,6 @@ export function render({ navigate, route, chrome }) {
 
   const wrap = document.createElement('div');
   wrap.className = 'chat-wrap dm-chat-wrap';
-  const scrollToBottomControl = attachScrollToBottomButton({
-    scrollContainer: () => boundScrollContainer || wrap,
-  });
-
   const historyLoader = document.createElement('div');
   historyLoader.className = 'dm-history-loader';
   historyLoader.hidden = true;
@@ -1563,7 +1558,6 @@ export function render({ navigate, route, chrome }) {
     void loadHistoryPage({ preserveScroll: true });
   });
   screen.cleanup = () => {
-    scrollToBottomControl.cleanup();
     hideUnreadSeparator({ rerender: false });
     stopAllTwemojiAnimations();
     window.removeEventListener('shine-chat-messages-updated', handleIncomingChatRefresh);
diff --git a/shine-UI/js/pages/notifications-view.js b/shine-UI/js/pages/notifications-view.js
index d9418ef9..85778cfd 100644
--- a/shine-UI/js/pages/notifications-view.js
+++ b/shine-UI/js/pages/notifications-view.js
@@ -306,8 +306,20 @@ export function render({ navigate, chrome } = {}) {
   const tabs = document.createElement('div');
   tabs.className = 'tabs';
   tabs.innerHTML = `
-    <button class="tab-btn ${state.notificationsTab === 'replies' ? 'active' : ''}" data-tab="replies">Ответы</button>
-    <button class="tab-btn ${state.notificationsTab === 'events' ? 'active' : ''}" data-tab="events">События</button>
+    <button
+      type="button"
+      class="tab-btn notification-tab-btn ${state.notificationsTab === 'replies' ? 'active' : ''}"
+      data-tab="replies"
+      data-selected="${state.notificationsTab === 'replies' ? 'true' : 'false'}"
+      aria-selected="${state.notificationsTab === 'replies' ? 'true' : 'false'}"
+    >Ответы</button>
+    <button
+      type="button"
+      class="tab-btn notification-tab-btn ${state.notificationsTab === 'events' ? 'active' : ''}"
+      data-tab="events"
+      data-selected="${state.notificationsTab === 'events' ? 'true' : 'false'}"
+      aria-selected="${state.notificationsTab === 'events' ? 'true' : 'false'}"
+    >События</button>
   `;
 
   const list = document.createElement('div');
@@ -347,13 +359,31 @@ export function render({ navigate, chrome } = {}) {
     }
   }
 
-  tabs.querySelectorAll('.tab-btn').forEach((btn) => {
+  function setActiveNotificationTab(nextTab) {
+    const normalizedTab = nextTab === 'events' ? 'events' : 'replies';
+    state.notificationsTab = normalizedTab;
+
+    tabs.querySelectorAll('.notification-tab-btn').forEach((node) => {
+      const selected = node.dataset.tab === normalizedTab;
+      node.classList.toggle('active', selected);
+      node.dataset.selected = selected ? 'true' : 'false';
+      node.setAttribute('aria-selected', selected ? 'true' : 'false');
+    });
+  }
+
+  // Активная кнопка остаётся визуально нажатой до выбора второй вкладки.
+  // При переключении класс active и aria-selected синхронно переходят на новую кнопку.
+  setActiveNotificationTab(state.notificationsTab);
+
+  tabs.querySelectorAll('.notification-tab-btn').forEach((btn) => {
     btn.addEventListener('click', () => {
-      const nextTab = String(btn.dataset.tab || 'replies');
-      if (state.notificationsTab === nextTab) return;
-      state.notificationsTab = nextTab;
-      tabs.querySelectorAll('.tab-btn').forEach((node) => node.classList.remove('active'));
-      btn.classList.add('active');
+      const nextTab = btn.dataset.tab === 'events' ? 'events' : 'replies';
+      if (state.notificationsTab === nextTab) {
+        setActiveNotificationTab(nextTab);
+        return;
+      }
+
+      setActiveNotificationTab(nextTab);
       void load();
     });
   });
diff --git a/shine-UI/styles/buttons-white.css b/shine-UI/styles/buttons-white.css
new file mode 100644
index 00000000..27ef5786
--- /dev/null
+++ b/shine-UI/styles/buttons-white.css
@@ -0,0 +1,165 @@
+/*
+ * Единый визуальный язык кнопок основного приложения:
+ * белое содержимое, без рамок и самостоятельной подложки.
+ *
+ * Исключения:
+ * - фильтры групп на экране «Связи» (.fg-filter-chip) сохраняют прежний вид;
+ * - нижний toolbar (.toolbar-btn) полностью сохраняет исходное оформление.
+ */
+:root button:not(.fg-filter-chip):not(.toolbar-btn),
+:root a.primary-btn,
+:root a.secondary-btn,
+:root a.destructive-btn,
+:root a.ghost-btn,
+:root a.icon-btn,
+:root a.text-btn {
+  color: #ffffff !important;
+  background: transparent !important;
+  background-image: none !important;
+  border: 0 !important;
+  box-shadow: none !important;
+  text-shadow: none !important;
+  backdrop-filter: none !important;
+  -webkit-backdrop-filter: none !important;
+  transition:
+    transform 90ms ease,
+    box-shadow 90ms ease,
+    background-color 90ms ease,
+    filter 120ms ease;
+}
+
+:root button:not(.fg-filter-chip):not(.toolbar-btn):hover,
+:root a.primary-btn:hover,
+:root a.secondary-btn:hover,
+:root a.destructive-btn:hover,
+:root a.ghost-btn:hover,
+:root a.icon-btn:hover,
+:root a.text-btn:hover {
+  color: #ffffff !important;
+  background: transparent !important;
+  border: 0 !important;
+  box-shadow: none !important;
+  filter: brightness(1.12);
+}
+
+/* Короткий press-feedback: кнопка визуально уходит внутрь поверхности.
+ * Эффект существует только пока кнопка физически нажата.
+ */
+:root button:not(.fg-filter-chip):not(.toolbar-btn):active,
+:root a.primary-btn:active,
+:root a.secondary-btn:active,
+:root a.destructive-btn:active,
+:root a.ghost-btn:active,
+:root a.icon-btn:active,
+:root a.text-btn:active {
+  color: #ffffff !important;
+  background: rgba(0, 0, 0, 0.12) !important;
+  border: 0 !important;
+  box-shadow:
+    inset 0 3px 8px rgba(0, 0, 0, 0.58),
+    inset 0 -1px 2px rgba(255, 255, 255, 0.08) !important;
+  transform: translateY(1px) scale(0.97);
+  filter: brightness(0.9);
+}
+
+
+:root button:not(.fg-filter-chip):not(.toolbar-btn):disabled,
+:root button:not(.fg-filter-chip):not(.toolbar-btn)[aria-disabled='true'],
+:root a.primary-btn[aria-disabled='true'],
+:root a.secondary-btn[aria-disabled='true'],
+:root a.destructive-btn[aria-disabled='true'],
+:root a.ghost-btn[aria-disabled='true'],
+:root a.icon-btn[aria-disabled='true'],
+:root a.text-btn[aria-disabled='true'] {
+  color: rgba(255, 255, 255, 0.42) !important;
+  background: transparent !important;
+  border: 0 !important;
+  box-shadow: none !important;
+  transform: none !important;
+  filter: none !important;
+}
+
+/* Убираем декоративные стеклянные/неоновые подложки самих кнопок.
+ * Переключатель канала исключён: его ::after является функциональным бегунком.
+ * Toolbar исключён целиком: у него остаётся исходная графика приложения.
+ */
+:root button:not(.fg-filter-chip):not(.toolbar-btn):not(.channel-toggle-btn)::before,
+:root button:not(.fg-filter-chip):not(.toolbar-btn):not(.channel-toggle-btn)::after {
+  background: transparent !important;
+  background-image: none !important;
+  border-color: transparent !important;
+  box-shadow: none !important;
+}
+
+/* Toolbar возвращён к исходному оформлению. Добавляем только краткое вдавливание
+ * на физическое нажатие; active-вкладка после отпускания остаётся такой, как была.
+ */
+:root .toolbar-btn {
+  transition:
+    transform 90ms ease,
+    box-shadow 90ms ease,
+    background-color 90ms ease,
+    color 120ms ease;
+}
+
+:root .toolbar-btn:active {
+  transform: translateY(1px) scale(0.96);
+  background: rgba(0, 0, 0, 0.14) !important;
+  box-shadow:
+    inset 0 4px 10px rgba(0, 0, 0, 0.62),
+    inset 0 -1px 2px rgba(255, 255, 255, 0.08) !important;
+}
+
+/* Клавиатурный фокус остаётся различимым без постоянной рамки кнопки. */
+:root button:not(.fg-filter-chip):not(.toolbar-btn):focus-visible,
+:root a.primary-btn:focus-visible,
+:root a.secondary-btn:focus-visible,
+:root a.destructive-btn:focus-visible,
+:root a.ghost-btn:focus-visible,
+:root a.icon-btn:focus-visible,
+:root a.text-btn:focus-visible {
+  outline: 2px solid rgba(255, 255, 255, 0.62);
+  outline-offset: 2px;
+}
+
+/* Уведомления: «Ответы / События».
+ * ВАЖНО: общий button:hover выше имеет большую специфичность, поэтому для выбранной
+ * вкладки фиксируем отдельный data-selected и перечисляем hover/focus/active.
+ * Так выбранная кнопка остаётся визуально вдавленной и после отпускания мыши.
+ */
+:root body .notifications-screen .tabs button.notification-tab-btn[data-selected='true'],
+:root body .notifications-screen .tabs button.notification-tab-btn[data-selected='true']:hover,
+:root body .notifications-screen .tabs button.notification-tab-btn[data-selected='true']:focus,
+:root body .notifications-screen .tabs button.notification-tab-btn[data-selected='true']:focus-visible,
+:root body .notifications-screen .tabs button.notification-tab-btn[data-selected='true']:active {
+  color: #ffffff !important;
+  background: rgba(0, 0, 0, 0.18) !important;
+  border: 0 !important;
+  box-shadow:
+    inset 0 4px 11px rgba(0, 0, 0, 0.72),
+    inset 0 -1px 2px rgba(255, 255, 255, 0.10) !important;
+  transform: translateY(1px) scale(0.965) !important;
+  filter: brightness(0.88) !important;
+}
+
+:root body .notifications-screen .tabs button.notification-tab-btn[data-selected='false'],
+:root body .notifications-screen .tabs button.notification-tab-btn[data-selected='false']:hover {
+  color: #ffffff !important;
+  background: transparent !important;
+  border: 0 !important;
+  box-shadow: none !important;
+  transform: none !important;
+  filter: none !important;
+}
+
+/* Неактивная вкладка кратко вдавливается во время физического нажатия.
+ * После click data-selected меняется и постоянный стиль остаётся уже на ней.
+ */
+:root body .notifications-screen .tabs button.notification-tab-btn[data-selected='false']:active {
+  background: rgba(0, 0, 0, 0.12) !important;
+  box-shadow:
+    inset 0 3px 8px rgba(0, 0, 0, 0.58),
+    inset 0 -1px 2px rgba(255, 255, 255, 0.08) !important;
+  transform: translateY(1px) scale(0.97) !important;
+  filter: brightness(0.9) !important;
+}
diff --git a/shine-UI/styles/components.css b/shine-UI/styles/components.css
index 286cc78d..7d52f6d6 100644
--- a/shine-UI/styles/components.css
+++ b/shine-UI/styles/components.css
@@ -6408,9 +6408,9 @@ html, body { overflow-x: hidden; }
 .dm-screen .bubble.out {
   justify-self: end;
   border-radius: 18px 18px 4px 18px;
-  border: 1px solid rgba(212, 175, 55, 0.38);
-  background: rgba(212, 175, 55, 0.16);
-  color: rgba(255, 236, 191, 0.96);
+  border: 1px solid rgba(83, 216, 251, 0.4);
+  background: rgba(83, 216, 251, 0.16);
+  color: rgba(225, 248, 255, 0.97);
   backdrop-filter: blur(20px);
   -webkit-backdrop-filter: blur(20px);
 }
@@ -8141,3 +8141,55 @@ html, body { overflow-x: hidden; }
 .notifications-screen .notification-card--clickable:active {
   transform: scale(0.99);
 }
+
+
+/* ===== Общая кнопка прокрутки ленты вниз ===== */
+.scroll-to-bottom-btn {
+  position: absolute;
+  right: 18px;
+  bottom: calc(var(--toolbar-height, 78px) + var(--composer-height, 0px) + 18px + env(safe-area-inset-bottom));
+  width: 48px;
+  height: 48px;
+  margin: 0;
+  padding: 0;
+  cursor: pointer;
+  -webkit-tap-highlight-color: transparent;
+  border-radius: 999px;
+  border: 1px solid rgba(212, 175, 55, 0.45);
+  background: linear-gradient(160deg, rgba(16, 24, 38, 0.94), rgba(12, 18, 30, 0.9));
+  color: rgba(255, 227, 150, 0.96);
+  box-shadow: 0 12px 26px rgba(3, 8, 18, 0.45), 0 0 20px rgba(212, 175, 55, 0.16);
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  z-index: 38;
+  opacity: 0;
+  pointer-events: none;
+  transform: translateY(8px);
+  transition: opacity 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
+}
+
+.scroll-to-bottom-btn.is-visible {
+  opacity: 1;
+  pointer-events: auto;
+  transform: translateY(0);
+}
+
+.scroll-to-bottom-btn:hover {
+  box-shadow: 0 14px 30px rgba(3, 8, 18, 0.55), 0 0 24px rgba(212, 175, 55, 0.22);
+}
+
+.scroll-to-bottom-btn:focus-visible {
+  outline: 2px solid rgba(255, 227, 150, 0.92);
+  outline-offset: 3px;
+}
+
+.scroll-to-bottom-btn__icon {
+  font-size: 22px;
+  line-height: 1;
+  transform: translateY(-1px);
+}
+
+body.chat-topbar-overlay .app-shell.keyboard-open .scroll-to-bottom-btn {
+  bottom: calc(var(--keyboard-offset, 0px) + var(--composer-height, 0px) + 18px);
+}