diff --git a/package-lock.json b/package-lock.json
index 6861736..e5a9491 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -798,18 +798,6 @@
         "tslib": "^2.4.0"
       }
     },
-    "node_modules/@types/node": {
-      "version": "25.8.0",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-25.8.0.tgz",
-      "integrity": "sha512-TCFSk8IZh+iLX1xtksoBVtdmgL+1IX0fC9BeU4QqFSuNdN/K+HUlhqOzEmSYYpZUVsLYcPqc9KX+60iDuninSQ==",
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "peer": true,
-      "dependencies": {
-        "undici-types": ">=7.24.0 <7.24.7"
-      }
-    },
     "node_modules/@types/react": {
       "version": "19.2.14",
       "resolved": "https://registry.npmjs.org/@types/react/-/react-19.2.14.tgz",
@@ -4647,9 +4635,9 @@
       }
     },
     "node_modules/tmp": {
-      "version": "0.2.5",
-      "resolved": "https://registry.npmjs.org/tmp/-/tmp-0.2.5.tgz",
-      "integrity": "sha512-voyz6MApa1rQGUxT3E+BK7/ROe8itEx7vD8/HEvt4xwXucvQ5G5oeEiHkmHZJuBO21RpOf+YYm9MOivj709jow==",
+      "version": "0.2.7",
+      "resolved": "https://registry.npmjs.org/tmp/-/tmp-0.2.7.tgz",
+      "integrity": "sha512-e0votIpp4Uo2AJYSzVHV6xCcawuiez3DzqDAbrTc3YxBkplN6e+dM13ZeIcZnDg/QpSuU2zfZ3rzwY8ukEnaXw==",
       "license": "MIT",
       "engines": {
         "node": ">=14.14"
@@ -4719,15 +4707,6 @@
       "integrity": "sha512-/aCDEGatGvZ2BIk+HmLf4ifCJFwvKFNb9/JeZPMulfgFracn9QFcAf5GO8B/mweUjSoblS5In0cWhqpfs/5PQA==",
       "license": "MIT"
     },
-    "node_modules/undici-types": {
-      "version": "7.24.6",
-      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.24.6.tgz",
-      "integrity": "sha512-WRNW+sJgj5OBN4/0JpHFqtqzhpbnV0GuB+OozA9gCL7a993SmU+1JBZCzLNxYsbMfIeDL+lTsphD5jN5N+n0zg==",
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "peer": true
-    },
     "node_modules/unicode-properties": {
       "version": "1.4.1",
       "resolved": "https://registry.npmjs.org/unicode-properties/-/unicode-properties-1.4.1.tgz",
diff --git a/src/components/FederatedRoomCard.jsx b/src/components/FederatedRoomCard.jsx
index 61ab7b1..d63bcec 100644
--- a/src/components/FederatedRoomCard.jsx
+++ b/src/components/FederatedRoomCard.jsx
@@ -30,8 +30,21 @@ export default function FederatedRoomCard({ room, onRemove }) {
 
   const recordingOn = room.allow_recording === 1 || room.allow_recording === true;
 
+  const openRoom = () => navigate(`/federation/rooms/${room.id}`);
+
   return (
-    <div className={`card-hover group p-5 cursor-pointer ${isDeleted ? 'opacity-60' : ''}`} onClick={() => navigate(`/federation/rooms/${room.id}`)}>
+    <div
+      role="link"
+      tabIndex={0}
+      aria-label={room.room_name}
+      onClick={openRoom}
+      onKeyDown={(e) => {
+        if (e.target !== e.currentTarget) return;
+        if (e.key === 'Enter' || e.key === ' ') { e.preventDefault(); openRoom(); }
+      }}
+      className={`card-hover group p-5 cursor-pointer focus:outline-hidden focus:ring-2 focus:ring-th-ring focus:ring-offset-2 ${isDeleted ? 'opacity-60' : ''}`}
+      style={{ '--tw-ring-offset-color': 'var(--bg-primary)' }}
+    >
       <div className="flex items-start justify-between mb-3">
         <div className="flex-1 min-w-0">
           <div className="flex items-center gap-2">
@@ -107,6 +120,7 @@ export default function FederatedRoomCard({ room, onRemove }) {
         <button
           onClick={handleRemove}
           className="btn-ghost text-xs py-1.5 px-2 text-th-error hover:text-th-error"
+          aria-label={t('federation.removeRoom')}
           title={t('federation.removeRoom')}
         >
           <Trash2 size={14} />
diff --git a/src/components/Modal.jsx b/src/components/Modal.jsx
index e45933f..597162e 100644
--- a/src/components/Modal.jsx
+++ b/src/components/Modal.jsx
@@ -1,15 +1,49 @@
+import { useEffect, useId, useRef } from 'react';
 import { X } from 'lucide-react';
+import { useLanguage } from '../contexts/LanguageContext';
 
 export default function Modal({ title, children, onClose, maxWidth = 'max-w-lg' }) {
+  const { t } = useLanguage();
+  const titleId = useId();
+  const dialogRef = useRef(null);
+  const previouslyFocused = useRef(null);
+
+  useEffect(() => {
+    previouslyFocused.current = document.activeElement;
+    const handleKey = (e) => {
+      if (e.key === 'Escape') onClose?.();
+    };
+    document.addEventListener('keydown', handleKey);
+    // Focus the dialog so screen readers announce it and keyboard focus lands inside
+    dialogRef.current?.focus();
+    return () => {
+      document.removeEventListener('keydown', handleKey);
+      previouslyFocused.current?.focus?.();
+    };
+  }, [onClose]);
+
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center p-4">
-      <div className="fixed inset-0 bg-black/60 backdrop-blur-xs" onClick={onClose} />
-      <div className={`relative bg-th-card rounded-2xl border border-th-border shadow-2xl w-full ${maxWidth}`}>
+      <div
+        className="fixed inset-0 bg-black/60 backdrop-blur-xs"
+        onClick={onClose}
+        aria-hidden="true"
+      />
+      <div
+        ref={dialogRef}
+        role="dialog"
+        aria-modal="true"
+        aria-labelledby={titleId}
+        tabIndex={-1}
+        className={`relative bg-th-card rounded-2xl border border-th-border shadow-2xl w-full ${maxWidth} focus:outline-hidden`}
+      >
         {/* Header */}
         <div className="flex items-center justify-between px-6 py-4 border-b border-th-border rounded-t-2xl">
-          <h2 className="text-lg font-semibold text-th-text">{title}</h2>
+          <h2 id={titleId} className="text-lg font-semibold text-th-text">{title}</h2>
           <button
+            type="button"
             onClick={onClose}
+            aria-label={t('common.close')}
             className="p-2 rounded-lg hover:bg-th-hover text-th-text-s transition-colors"
           >
             <X size={20} />
diff --git a/src/components/Navbar.jsx b/src/components/Navbar.jsx
index 865d546..804d6ff 100644
--- a/src/components/Navbar.jsx
+++ b/src/components/Navbar.jsx
@@ -44,6 +44,7 @@ export default function Navbar({ onMenuClick }) {
         <div className="flex items-center gap-3">
           <button
             onClick={onMenuClick}
+            aria-label={t('nav.navigation')}
             className="lg:hidden p-2 rounded-lg hover:bg-th-hover text-th-text-s transition-colors"
           >
             <Menu size={20} />
@@ -59,6 +60,9 @@ export default function Navbar({ onMenuClick }) {
           <div className="relative" ref={dropdownRef}>
             <button
               onClick={() => setDropdownOpen(!dropdownOpen)}
+              aria-label={user?.display_name || user?.name}
+              aria-haspopup="menu"
+              aria-expanded={dropdownOpen}
               className="flex items-center gap-2 p-1.5 rounded-lg hover:bg-th-hover transition-colors"
             >
               <div
@@ -68,7 +72,7 @@ export default function Navbar({ onMenuClick }) {
                 {user?.avatar_image ? (
                   <img
                     src={`${api.defaults.baseURL}/auth/avatar/${user.avatar_image}`}
-                    alt="Avatar"
+                    alt=""
                     className="w-full h-full object-cover"
                   />
                 ) : (
diff --git a/src/components/NotificationBell.jsx b/src/components/NotificationBell.jsx
index 421bb4b..a0d070c 100644
--- a/src/components/NotificationBell.jsx
+++ b/src/components/NotificationBell.jsx
@@ -83,6 +83,11 @@ export default function NotificationBell() {
       <button
         onClick={() => setOpen(prev => !prev)}
         className="relative p-2 rounded-lg hover:bg-th-hover text-th-text-s transition-colors"
+        aria-label={unreadCount > 0
+          ? `${t('notifications.bell')} (${unreadCount})`
+          : t('notifications.bell')}
+        aria-haspopup="true"
+        aria-expanded={open}
         title={t('notifications.bell')}
       >
         <Bell size={20} />
@@ -174,6 +179,7 @@ export default function NotificationBell() {
                       <button
                         onClick={(e) => handleDelete(e, n.id)}
                         className="opacity-0 group-hover:opacity-100 p-0.5 rounded-sm hover:text-th-error transition-all text-th-text-s/50"
+                        aria-label={t('notifications.delete')}
                         title={t('notifications.delete')}
                       >
                         <X size={13} />
diff --git a/src/components/RoomCard.jsx b/src/components/RoomCard.jsx
index 48ab9d4..1b14ee2 100644
--- a/src/components/RoomCard.jsx
+++ b/src/components/RoomCard.jsx
@@ -43,8 +43,21 @@ export default function RoomCard({ room, onDelete }) {
     return () => clearInterval(interval);
   }, [room.uid]);
 
+  const openRoom = () => navigate(`/rooms/${room.uid}`);
+
   return (
-    <div className="card-hover group p-5 cursor-pointer" onClick={() => navigate(`/rooms/${room.uid}`)}>
+    <div
+      role="link"
+      tabIndex={0}
+      aria-label={room.name}
+      onClick={openRoom}
+      onKeyDown={(e) => {
+        if (e.target !== e.currentTarget) return;
+        if (e.key === 'Enter' || e.key === ' ') { e.preventDefault(); openRoom(); }
+      }}
+      className="card-hover group p-5 cursor-pointer focus:outline-hidden focus:ring-2 focus:ring-th-ring focus:ring-offset-2"
+      style={{ '--tw-ring-offset-color': 'var(--bg-primary)' }}
+    >
       <div className="flex items-start justify-between mb-3">
         <div className="flex-1 min-w-0">
           <div className="flex items-center gap-2">
@@ -121,6 +134,9 @@ export default function RoomCard({ room, onDelete }) {
           <button
             onClick={(e) => { e.stopPropagation(); setShowCopyMenu(v => !v); }}
             className="btn-ghost text-xs py-1.5 px-2"
+            aria-label={t('room.copyLink')}
+            aria-haspopup="menu"
+            aria-expanded={showCopyMenu}
             title={t('room.copyLink')}
           >
             <Copy size={14} />
@@ -148,6 +164,7 @@ export default function RoomCard({ room, onDelete }) {
           <button
             onClick={(e) => { e.stopPropagation(); onDelete(room); }}
             className="btn-ghost text-xs py-1.5 px-2 text-th-error hover:text-th-error"
+            aria-label={t('common.delete')}
             title={t('common.delete')}
           >
             <Trash2 size={14} />
diff --git a/src/components/Sidebar.jsx b/src/components/Sidebar.jsx
index e443f12..8e04805 100644
--- a/src/components/Sidebar.jsx
+++ b/src/components/Sidebar.jsx
@@ -60,6 +60,7 @@ export default function Sidebar({ open, onClose }) {
             <BrandLogo size="md" className="flex-1 min-w-0" />
             <button
               onClick={onClose}
+              aria-label={t('common.close')}
               className="lg:hidden p-1.5 rounded-lg hover:bg-th-hover text-th-text-s transition-colors"
             >
               <X size={18} />
@@ -112,7 +113,7 @@ export default function Sidebar({ open, onClose }) {
                 {user?.avatar_image ? (
                   <img
                     src={`${api.defaults.baseURL}/auth/avatar/${user.avatar_image}`}
-                    alt="Avatar"
+                    alt=""
                     className="w-full h-full object-cover"
                   />
                 ) : (
diff --git a/src/components/ThemeSelector.jsx b/src/components/ThemeSelector.jsx
index 68c5b09..f5d9604 100644
--- a/src/components/ThemeSelector.jsx
+++ b/src/components/ThemeSelector.jsx
@@ -10,17 +10,23 @@ export default function ThemeSelector({ onClose }) {
 
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center p-4">
-      <div className="fixed inset-0 bg-black/60 backdrop-blur-xs" onClick={onClose} />
+      <div className="fixed inset-0 bg-black/60 backdrop-blur-xs" onClick={onClose} aria-hidden="true" />
 
-      <div className="relative bg-th-card rounded-2xl border border-th-border shadow-2xl w-full max-w-2xl max-h-[80vh] overflow-hidden">
+      <div
+        role="dialog"
+        aria-modal="true"
+        aria-labelledby="theme-selector-title"
+        className="relative bg-th-card rounded-2xl border border-th-border shadow-2xl w-full max-w-2xl max-h-[80vh] overflow-hidden"
+      >
         {/* Header */}
         <div className="flex items-center justify-between px-6 py-4 border-b border-th-border">
           <div>
-            <h2 className="text-lg font-semibold text-th-text">{t('themes.selectTheme')}</h2>
+            <h2 id="theme-selector-title" className="text-lg font-semibold text-th-text">{t('themes.selectTheme')}</h2>
             <p className="text-sm text-th-text-s mt-0.5">{t('themes.selectThemeSubtitle')}</p>
           </div>
           <button
             onClick={onClose}
+            aria-label={t('common.close')}
             className="p-2 rounded-lg hover:bg-th-hover text-th-text-s transition-colors"
           >
             <X size={20} />
diff --git a/src/i18n/de.json b/src/i18n/de.json
index 9d24296..fc85f9b 100644
--- a/src/i18n/de.json
+++ b/src/i18n/de.json
@@ -23,7 +23,9 @@
     "protected": "Geschützt",
     "live": "Live",
     "error": "Fehler",
-    "success": "Erfolg"
+    "success": "Erfolg",
+    "gridView": "Rasteransicht",
+    "listView": "Listenansicht"
   },
   "nav": {
     "dashboard": "Dashboard",
diff --git a/src/i18n/en.json b/src/i18n/en.json
index 94410f1..d8a803a 100644
--- a/src/i18n/en.json
+++ b/src/i18n/en.json
@@ -23,7 +23,9 @@
     "protected": "Protected",
     "live": "Live",
     "error": "Error",
-    "success": "Success"
+    "success": "Success",
+    "gridView": "Grid view",
+    "listView": "List view"
   },
   "nav": {
     "dashboard": "Dashboard",
diff --git a/src/pages/Admin.jsx b/src/pages/Admin.jsx
index df269ab..a957bb1 100644
--- a/src/pages/Admin.jsx
+++ b/src/pages/Admin.jsx
@@ -423,17 +423,18 @@ export default function Admin() {
         <div className="grid gap-6 sm:grid-cols-2">
           {/* Logo upload */}
           <div>
-            <label className="block text-sm font-medium text-th-text mb-2">{t('admin.logoLabel')}</label>
+            <p className="block text-sm font-medium text-th-text mb-2">{t('admin.logoLabel')}</p>
             <div className="flex items-center gap-4">
               {hasLogo && logoUrl ? (
                 <div className="relative group">
                   <img
                     src={`${logoUrl}?t=${Date.now()}`}
-                    alt="Logo"
+                    alt=""
                     className="w-14 h-14 rounded-xl object-contain border border-th-border bg-th-bg p-1"
                   />
                   <button
                     onClick={handleLogoRemove}
+                    aria-label={t('common.delete')}
                     className="absolute -top-2 -right-2 w-5 h-5 bg-th-error text-white rounded-full flex items-center justify-center opacity-0 group-hover:opacity-100 transition-opacity"
                   >
                     <XIcon size={12} />
@@ -471,11 +472,12 @@ export default function Admin() {
 
           {/* App name */}
           <div>
-            <label className="block text-sm font-medium text-th-text mb-2">{t('admin.appNameLabel')}</label>
+            <label htmlFor="admin-app-name" className="block text-sm font-medium text-th-text mb-2">{t('admin.appNameLabel')}</label>
             <div className="flex items-center gap-2">
               <div className="relative flex-1">
-                <Type size={16} className="absolute left-3 top-1/2 -translate-y-1/2 text-th-text-s" />
+                <Type size={16} className="absolute left-3 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
                 <input
+                  id="admin-app-name"
                   type="text"
                   value={editAppName}
                   onChange={e => setEditAppName(e.target.value)}
@@ -520,12 +522,13 @@ export default function Admin() {
         {/* Default theme */}
         <div className="mt-6 pt-6 border-t border-th-border">
           <div className="flex items-center gap-2 mb-1">
-            <Palette size={16} className="text-th-accent" />
-            <label className="block text-sm font-medium text-th-text">{t('admin.defaultThemeLabel')}</label>
+            <Palette size={16} className="text-th-accent" aria-hidden="true" />
+            <label htmlFor="admin-default-theme" className="block text-sm font-medium text-th-text">{t('admin.defaultThemeLabel')}</label>
           </div>
           <p className="text-xs text-th-text-s mb-3">{t('admin.defaultThemeDesc')}</p>
           <div className="flex items-center gap-2">
             <select
+              id="admin-default-theme"
               value={editDefaultTheme}
               onChange={e => setEditDefaultTheme(e.target.value)}
               className="input-field text-sm flex-1"
@@ -549,16 +552,17 @@ export default function Admin() {
         {/* Legal links */}
         <div className="mt-6 pt-6 border-t border-th-border">
           <div className="flex items-center gap-2 mb-1">
-            <LinkIcon size={16} className="text-th-accent" />
-            <label className="block text-sm font-medium text-th-text">{t('admin.legalLinksTitle')}</label>
+            <LinkIcon size={16} className="text-th-accent" aria-hidden="true" />
+            <p className="block text-sm font-medium text-th-text">{t('admin.legalLinksTitle')}</p>
           </div>
           <p className="text-xs text-th-text-s mb-4">{t('admin.legalLinksDesc')}</p>
           <div className="grid gap-4 sm:grid-cols-2">
             {/* Imprint */}
             <div>
-              <label className="block text-xs font-medium text-th-text-s mb-1">{t('admin.imprintUrl')}</label>
+              <label htmlFor="admin-imprint-url" className="block text-xs font-medium text-th-text-s mb-1">{t('admin.imprintUrl')}</label>
               <div className="flex items-center gap-2">
                 <input
+                  id="admin-imprint-url"
                   type="url"
                   value={editImprintUrl}
                   onChange={e => setEditImprintUrl(e.target.value)}
@@ -577,9 +581,10 @@ export default function Admin() {
             </div>
             {/* Privacy Policy */}
             <div>
-              <label className="block text-xs font-medium text-th-text-s mb-1">{t('admin.privacyUrl')}</label>
+              <label htmlFor="admin-privacy-url" className="block text-xs font-medium text-th-text-s mb-1">{t('admin.privacyUrl')}</label>
               <div className="flex items-center gap-2">
                 <input
+                  id="admin-privacy-url"
                   type="url"
                   value={editPrivacyUrl}
                   onChange={e => setEditPrivacyUrl(e.target.value)}
@@ -647,13 +652,14 @@ export default function Admin() {
         {/* Send invite form */}
         <form onSubmit={handleSendInvite} className="flex items-center gap-2 mb-6">
           <div className="relative flex-1">
-            <Mail size={16} className="absolute left-3 top-1/2 -translate-y-1/2 text-th-text-s" />
+            <Mail size={16} className="absolute left-3 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
             <input
               type="email"
               value={inviteEmail}
               onChange={e => setInviteEmail(e.target.value)}
               className="input-field pl-9 text-sm"
               placeholder={t('auth.emailPlaceholder')}
+              aria-label={t('auth.email')}
               required
             />
           </div>
@@ -738,8 +744,9 @@ export default function Admin() {
           <form onSubmit={handleOauthSave} className="space-y-4">
             <div className="grid gap-4 sm:grid-cols-2">
               <div>
-                <label className="block text-sm font-medium text-th-text mb-1">{t('admin.oauthIssuer')}</label>
+                <label htmlFor="admin-oauth-issuer" className="block text-sm font-medium text-th-text mb-1">{t('admin.oauthIssuer')}</label>
                 <input
+                  id="admin-oauth-issuer"
                   type="url"
                   value={oauthForm.issuer}
                   onChange={e => setOauthForm(f => ({ ...f, issuer: e.target.value }))}
@@ -750,8 +757,9 @@ export default function Admin() {
                 <p className="text-xs text-th-text-s mt-1">{t('admin.oauthIssuerHint')}</p>
               </div>
               <div>
-                <label className="block text-sm font-medium text-th-text mb-1">{t('admin.oauthClientId')}</label>
+                <label htmlFor="admin-oauth-client-id" className="block text-sm font-medium text-th-text mb-1">{t('admin.oauthClientId')}</label>
                 <input
+                  id="admin-oauth-client-id"
                   type="text"
                   value={oauthForm.clientId}
                   onChange={e => setOauthForm(f => ({ ...f, clientId: e.target.value }))}
@@ -764,9 +772,11 @@ export default function Admin() {
 
             <div className="grid gap-4 sm:grid-cols-2">
               <div>
-                <label className="block text-sm font-medium text-th-text mb-1">{t('admin.oauthClientSecret')}</label>
+                <label htmlFor="admin-oauth-client-secret" className="block text-sm font-medium text-th-text mb-1">{t('admin.oauthClientSecret')}</label>
                 <input
+                  id="admin-oauth-client-secret"
                   type="password"
+                  autoComplete="new-password"
                   value={oauthForm.clientSecret}
                   onChange={e => setOauthForm(f => ({ ...f, clientSecret: e.target.value }))}
                   className="input-field text-sm"
@@ -777,8 +787,9 @@ export default function Admin() {
                 )}
               </div>
               <div>
-                <label className="block text-sm font-medium text-th-text mb-1">{t('admin.oauthDisplayName')}</label>
+                <label htmlFor="admin-oauth-display-name" className="block text-sm font-medium text-th-text mb-1">{t('admin.oauthDisplayName')}</label>
                 <input
+                  id="admin-oauth-display-name"
                   type="text"
                   value={oauthForm.displayName}
                   onChange={e => setOauthForm(f => ({ ...f, displayName: e.target.value }))}
@@ -941,13 +952,14 @@ export default function Admin() {
       {/* Search */}
       <div className="card p-4 mb-6">
         <div className="relative">
-          <Search size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" />
+          <Search size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
           <input
-            type="text"
+            type="search"
             value={search}
             onChange={e => setSearch(e.target.value)}
             className="input-field pl-11"
             placeholder={t('admin.searchUsers')}
+            aria-label={t('admin.searchUsers')}
           />
         </div>
       </div>
@@ -1099,14 +1111,16 @@ export default function Admin() {
       {/* Reset password modal */}
       {resetPwModal && (
         <div className="fixed inset-0 z-50 flex items-center justify-center p-4">
-          <div className="fixed inset-0 bg-black/60 backdrop-blur-xs" onClick={() => setResetPwModal(null)} />
-          <div className="relative bg-th-card rounded-2xl border border-th-border shadow-2xl w-full max-w-sm p-6">
-            <h3 className="text-lg font-semibold text-th-text mb-4">{t('admin.resetPasswordTitle')}</h3>
+          <div className="fixed inset-0 bg-black/60 backdrop-blur-xs" onClick={() => setResetPwModal(null)} aria-hidden="true" />
+          <div role="dialog" aria-modal="true" aria-labelledby="reset-pw-title" className="relative bg-th-card rounded-2xl border border-th-border shadow-2xl w-full max-w-sm p-6">
+            <h3 id="reset-pw-title" className="text-lg font-semibold text-th-text mb-4">{t('admin.resetPasswordTitle')}</h3>
             <form onSubmit={handleResetPassword}>
               <div className="mb-4">
-                <label className="block text-sm font-medium text-th-text mb-1.5">{t('admin.newPasswordLabel')}</label>
+                <label htmlFor="admin-reset-pw" className="block text-sm font-medium text-th-text mb-1.5">{t('admin.newPasswordLabel')}</label>
                 <input
+                  id="admin-reset-pw"
                   type="password"
+                  autoComplete="new-password"
                   value={newPassword}
                   onChange={e => setNewPassword(e.target.value)}
                   className="input-field"
@@ -1131,16 +1145,18 @@ export default function Admin() {
       {/* Create user modal */}
       {showCreateUser && (
         <div className="fixed inset-0 z-50 flex items-center justify-center p-4">
-          <div className="fixed inset-0 bg-black/60 backdrop-blur-xs" onClick={() => setShowCreateUser(false)} />
-          <div className="relative bg-th-card rounded-2xl border border-th-border shadow-2xl w-full max-w-md p-6">
-            <h3 className="text-lg font-semibold text-th-text mb-4">{t('admin.createUserTitle')}</h3>
+          <div className="fixed inset-0 bg-black/60 backdrop-blur-xs" onClick={() => setShowCreateUser(false)} aria-hidden="true" />
+          <div role="dialog" aria-modal="true" aria-labelledby="create-user-title" className="relative bg-th-card rounded-2xl border border-th-border shadow-2xl w-full max-w-md p-6">
+            <h3 id="create-user-title" className="text-lg font-semibold text-th-text mb-4">{t('admin.createUserTitle')}</h3>
             <form onSubmit={handleCreateUser} className="space-y-4">
               <div>
-                <label className="block text-sm font-medium text-th-text mb-1.5">{t('auth.username')}</label>
+                <label htmlFor="admin-new-username" className="block text-sm font-medium text-th-text mb-1.5">{t('auth.username')}</label>
                 <div className="relative">
-                  <User size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" />
+                  <User size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
                   <input
+                    id="admin-new-username"
                     type="text"
+                    autoComplete="off"
                     value={newUser.name}
                     onChange={e => setNewUser({ ...newUser, name: e.target.value })}
                     className="input-field pl-11"
@@ -1151,11 +1167,13 @@ export default function Admin() {
                 <p className="text-xs text-th-text-s mt-1">{t('auth.usernameHint')}</p>
               </div>
               <div>
-                <label className="block text-sm font-medium text-th-text mb-1.5">{t('auth.displayName')}</label>
+                <label htmlFor="admin-new-display-name" className="block text-sm font-medium text-th-text mb-1.5">{t('auth.displayName')}</label>
                 <div className="relative">
-                  <User size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" />
+                  <User size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
                   <input
+                    id="admin-new-display-name"
                     type="text"
+                    autoComplete="off"
                     value={newUser.display_name}
                     onChange={e => setNewUser({ ...newUser, display_name: e.target.value })}
                     className="input-field pl-11"
@@ -1164,11 +1182,13 @@ export default function Admin() {
                 </div>
               </div>
               <div>
-                <label className="block text-sm font-medium text-th-text mb-1.5">{t('auth.email')}</label>
+                <label htmlFor="admin-new-email" className="block text-sm font-medium text-th-text mb-1.5">{t('auth.email')}</label>
                 <div className="relative">
-                  <Mail size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" />
+                  <Mail size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
                   <input
+                    id="admin-new-email"
                     type="email"
+                    autoComplete="off"
                     value={newUser.email}
                     onChange={e => setNewUser({ ...newUser, email: e.target.value })}
                     className="input-field pl-11"
@@ -1178,11 +1198,13 @@ export default function Admin() {
                 </div>
               </div>
               <div>
-                <label className="block text-sm font-medium text-th-text mb-1.5">{t('auth.password')}</label>
+                <label htmlFor="admin-new-password" className="block text-sm font-medium text-th-text mb-1.5">{t('auth.password')}</label>
                 <div className="relative">
-                  <Lock size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" />
+                  <Lock size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
                   <input
+                    id="admin-new-password"
                     type="password"
+                    autoComplete="new-password"
                     value={newUser.password}
                     onChange={e => setNewUser({ ...newUser, password: e.target.value })}
                     className="input-field pl-11"
@@ -1193,8 +1215,9 @@ export default function Admin() {
                 </div>
               </div>
               <div>
-                <label className="block text-sm font-medium text-th-text mb-1.5">{t('admin.role')}</label>
+                <label htmlFor="admin-new-role" className="block text-sm font-medium text-th-text mb-1.5">{t('admin.role')}</label>
                 <select
+                  id="admin-new-role"
                   value={newUser.role}
                   onChange={e => setNewUser({ ...newUser, role: e.target.value })}
                   className="input-field"
@@ -1227,19 +1250,20 @@ export default function Admin() {
                 <h3 className="text-lg font-semibold text-th-text">{t('admin.roomsTitle')}</h3>
                 <span className="text-sm text-th-text-s">({adminRooms.length})</span>
               </div>
-              <button onClick={() => setShowAllRoomsModal(false)} className="p-1.5 rounded-lg hover:bg-th-hover text-th-text-s transition-colors">
+              <button onClick={() => setShowAllRoomsModal(false)} aria-label={t('common.close')} className="p-1.5 rounded-lg hover:bg-th-hover text-th-text-s transition-colors">
                 <XIcon size={18} />
               </button>
             </div>
             <div className="p-4 border-b border-th-border">
               <div className="relative">
-                <Search size={16} className="absolute left-3 top-1/2 -translate-y-1/2 text-th-text-s" />
+                <Search size={16} className="absolute left-3 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
                 <input
-                  type="text"
+                  type="search"
                   value={allRoomsSearch}
                   onChange={e => setAllRoomsSearch(e.target.value)}
                   className="input-field pl-9 text-sm"
                   placeholder={t('admin.searchRooms')}
+                  aria-label={t('admin.searchRooms')}
                   autoFocus
                 />
               </div>
diff --git a/src/pages/Calendar.jsx b/src/pages/Calendar.jsx
index c72f18a..28fbb87 100644
--- a/src/pages/Calendar.jsx
+++ b/src/pages/Calendar.jsx
@@ -515,8 +515,9 @@ export default function Calendar() {
         <Modal title={editingEvent ? t('calendar.editEvent') : t('calendar.createEvent')} onClose={() => { setShowCreate(false); setEditingEvent(null); }}>
           <form onSubmit={handleSave} className="space-y-4">
             <div>
-              <label className="block text-sm font-medium text-th-text mb-1.5">{t('calendar.eventTitle')} *</label>
+              <label htmlFor="calendar-event-title" className="block text-sm font-medium text-th-text mb-1.5">{t('calendar.eventTitle')} *</label>
               <input
+                id="calendar-event-title"
                 type="text"
                 value={form.title}
                 onChange={e => setForm({ ...form, title: e.target.value })}
@@ -527,8 +528,9 @@ export default function Calendar() {
             </div>
 
             <div>
-              <label className="block text-sm font-medium text-th-text mb-1.5">{t('calendar.description')}</label>
+              <label htmlFor="calendar-event-description" className="block text-sm font-medium text-th-text mb-1.5">{t('calendar.description')}</label>
               <textarea
+                id="calendar-event-description"
                 value={form.description}
                 onChange={e => setForm({ ...form, description: e.target.value })}
                 className="input-field resize-none"
@@ -560,8 +562,9 @@ export default function Calendar() {
             </div>
 
             <div>
-              <label className="block text-sm font-medium text-th-text mb-1.5">{t('calendar.linkedRoom')}</label>
+              <label htmlFor="calendar-event-room" className="block text-sm font-medium text-th-text mb-1.5">{t('calendar.linkedRoom')}</label>
               <select
+                id="calendar-event-room"
                 value={form.room_uid}
                 onChange={e => setForm({ ...form, room_uid: e.target.value })}
                 className="input-field"
@@ -575,10 +578,11 @@ export default function Calendar() {
             </div>
 
             <div>
-              <label className="block text-sm font-medium text-th-text mb-1.5">{t('calendar.reminderLabel')}</label>
+              <label htmlFor="calendar-event-reminder" className="block text-sm font-medium text-th-text mb-1.5">{t('calendar.reminderLabel')}</label>
               <div className="relative">
-                <Bell size={15} className="absolute left-3 top-1/2 -translate-y-1/2 text-th-text-s pointer-events-none" />
+                <Bell size={15} className="absolute left-3 top-1/2 -translate-y-1/2 text-th-text-s pointer-events-none" aria-hidden="true" />
                 <select
+                  id="calendar-event-reminder"
                   value={form.reminder_minutes ?? ''}
                   onChange={e => setForm({ ...form, reminder_minutes: e.target.value === '' ? null : Number(e.target.value) })}
                   className="input-field pl-9"
@@ -595,13 +599,16 @@ export default function Calendar() {
             </div>
 
             <div>
-              <label className="block text-sm font-medium text-th-text mb-1.5">{t('calendar.color')}</label>
-              <div className="flex gap-2">
+              <p id="calendar-event-color-label" className="block text-sm font-medium text-th-text mb-1.5">{t('calendar.color')}</p>
+              <div role="radiogroup" aria-labelledby="calendar-event-color-label" className="flex gap-2">
                 {COLORS.map(c => (
                   <button
                     key={c}
                     type="button"
                     onClick={() => setForm({ ...form, color: c })}
+                    role="radio"
+                    aria-checked={form.color === c}
+                    aria-label={c}
                     className={`w-7 h-7 rounded-full border-2 transition-all ${form.color === c ? 'border-th-text scale-110' : 'border-transparent'}`}
                     style={{ backgroundColor: c }}
                   />
@@ -826,8 +833,9 @@ export default function Calendar() {
           <p className="text-sm text-th-text-s mb-4">{t('calendar.sendFederatedDesc')}</p>
           <form onSubmit={handleFedSend} className="space-y-4">
             <div>
-              <label className="block text-sm font-medium text-th-text mb-1.5">{t('federation.addressLabel')}</label>
+              <label htmlFor="calendar-fed-share-address" className="block text-sm font-medium text-th-text mb-1.5">{t('federation.addressLabel')}</label>
               <input
+                id="calendar-fed-share-address"
                 type="text"
                 value={fedAddress}
                 onChange={e => setFedAddress(e.target.value)}
diff --git a/src/pages/Dashboard.jsx b/src/pages/Dashboard.jsx
index 11764f1..faa644f 100644
--- a/src/pages/Dashboard.jsx
+++ b/src/pages/Dashboard.jsx
@@ -103,9 +103,11 @@ export default function Dashboard() {
         </div>
         <div className="flex items-center gap-2">
           {/* View toggle */}
-          <div className="hidden sm:flex items-center bg-th-bg-s rounded-lg border border-th-border p-0.5">
+          <div role="group" aria-label={t('common.gridView') + ' / ' + t('common.listView')} className="hidden sm:flex items-center bg-th-bg-s rounded-lg border border-th-border p-0.5">
             <button
               onClick={() => setViewMode('grid')}
+              aria-label={t('common.gridView')}
+              aria-pressed={viewMode === 'grid'}
               className={`p-1.5 rounded-md transition-colors ${
                 viewMode === 'grid' ? 'bg-th-accent text-th-accent-t' : 'text-th-text-s hover:text-th-text'
               }`}
@@ -114,6 +116,8 @@ export default function Dashboard() {
             </button>
             <button
               onClick={() => setViewMode('list')}
+              aria-label={t('common.listView')}
+              aria-pressed={viewMode === 'list'}
               className={`p-1.5 rounded-md transition-colors ${
                 viewMode === 'list' ? 'bg-th-accent text-th-accent-t' : 'text-th-text-s hover:text-th-text'
               }`}
@@ -197,8 +201,9 @@ export default function Dashboard() {
         <Modal title={t('dashboard.createRoom')} onClose={() => setShowCreate(false)}>
           <form onSubmit={handleCreate} className="space-y-4">
             <div>
-              <label className="block text-sm font-medium text-th-text mb-1.5">{t('dashboard.roomName')} *</label>
+              <label htmlFor="create-room-name" className="block text-sm font-medium text-th-text mb-1.5">{t('dashboard.roomName')} *</label>
               <input
+                id="create-room-name"
                 type="text"
                 value={newRoom.name}
                 onChange={e => setNewRoom({ ...newRoom, name: e.target.value })}
@@ -210,8 +215,9 @@ export default function Dashboard() {
             </div>
 
             <div>
-              <label className="block text-sm font-medium text-th-text mb-1.5">{t('dashboard.welcomeMessage')}</label>
+              <label htmlFor="create-room-welcome" className="block text-sm font-medium text-th-text mb-1.5">{t('dashboard.welcomeMessage')}</label>
               <textarea
+                id="create-room-welcome"
                 value={newRoom.welcome_message}
                 onChange={e => setNewRoom({ ...newRoom, welcome_message: e.target.value })}
                 className="input-field resize-none"
@@ -222,8 +228,9 @@ export default function Dashboard() {
 
             <div className="grid grid-cols-2 gap-4">
               <div>
-                <label className="block text-sm font-medium text-th-text mb-1.5">{t('dashboard.maxParticipants')}</label>
+                <label htmlFor="create-room-max" className="block text-sm font-medium text-th-text mb-1.5">{t('dashboard.maxParticipants')}</label>
                 <input
+                  id="create-room-max"
                   type="number"
                   value={newRoom.max_participants}
                   onChange={e => setNewRoom({ ...newRoom, max_participants: parseInt(e.target.value) || 0 })}
@@ -233,8 +240,9 @@ export default function Dashboard() {
                 />
               </div>
               <div>
-                <label className="block text-sm font-medium text-th-text mb-1.5">{t('dashboard.accessCode')}</label>
+                <label htmlFor="create-room-access-code" className="block text-sm font-medium text-th-text mb-1.5">{t('dashboard.accessCode')}</label>
                 <input
+                  id="create-room-access-code"
                   type="text"
                   value={newRoom.access_code}
                   onChange={e => setNewRoom({ ...newRoom, access_code: e.target.value })}
diff --git a/src/pages/GuestJoin.jsx b/src/pages/GuestJoin.jsx
index 09f54b6..5d9968a 100644
--- a/src/pages/GuestJoin.jsx
+++ b/src/pages/GuestJoin.jsx
@@ -230,11 +230,13 @@ export default function GuestJoin() {
           ) : (
             <form onSubmit={handleJoin} className="space-y-4">
               <div>
-                <label className="block text-sm font-medium text-th-text mb-1.5">{t('room.guestYourName')} *</label>
+                <label htmlFor="guest-name" className="block text-sm font-medium text-th-text mb-1.5">{t('room.guestYourName')} *</label>
                 <div className="relative">
-                  <User size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" />
+                  <User size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
                   <input
+                    id="guest-name"
                     type="text"
+                    autoComplete="name"
                     value={name}
                     onChange={e => !isLoggedIn && setName(e.target.value)}
                     readOnly={isLoggedIn}
@@ -248,11 +250,13 @@ export default function GuestJoin() {
 
               {roomInfo.has_access_code && (
                 <div>
-                  <label className="block text-sm font-medium text-th-text mb-1.5">{t('room.guestAccessCode')}</label>
+                  <label htmlFor="guest-access-code" className="block text-sm font-medium text-th-text mb-1.5">{t('room.guestAccessCode')}</label>
                   <div className="relative">
-                    <Lock size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" />
+                    <Lock size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
                     <input
+                      id="guest-access-code"
                       type="text"
+                      autoComplete="off"
                       value={accessCode}
                       onChange={e => setAccessCode(e.target.value)}
                       className="input-field pl-11"
@@ -263,14 +267,16 @@ export default function GuestJoin() {
               )}
 
               <div>
-                <label className="block text-sm font-medium text-th-text mb-1.5">
+                <label htmlFor="guest-moderator-code" className="block text-sm font-medium text-th-text mb-1.5">
                   {t('room.guestModeratorCode')}
                   <span className="text-th-text-s font-normal ml-1">{t('room.guestModeratorOptional')}</span>
                 </label>
                 <div className="relative">
-                  <Shield size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" />
+                  <Shield size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
                   <input
+                    id="guest-moderator-code"
                     type="text"
+                    autoComplete="off"
                     value={moderatorCode}
                     onChange={e => setModeratorCode(e.target.value)}
                     className="input-field pl-11"
diff --git a/src/pages/Login.jsx b/src/pages/Login.jsx
index 12da358..5a385c2 100644
--- a/src/pages/Login.jsx
+++ b/src/pages/Login.jsx
@@ -189,11 +189,13 @@ export default function Login() {
 
               <form onSubmit={handleSubmit} className="space-y-5">
                 <div>
-                  <label className="block text-sm font-medium text-th-text mb-1.5">{t('auth.email')}</label>
+                  <label htmlFor="login-email" className="block text-sm font-medium text-th-text mb-1.5">{t('auth.email')}</label>
                   <div className="relative">
-                    <Mail size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" />
+                    <Mail size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
                     <input
+                      id="login-email"
                       type="email"
+                      autoComplete="email"
                       value={email}
                       onChange={e => setEmail(e.target.value)}
                       className="input-field pl-11"
@@ -204,11 +206,13 @@ export default function Login() {
                 </div>
 
                 <div>
-                  <label className="block text-sm font-medium text-th-text mb-1.5">{t('auth.password')}</label>
+                  <label htmlFor="login-password" className="block text-sm font-medium text-th-text mb-1.5">{t('auth.password')}</label>
                   <div className="relative">
-                    <Lock size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" />
+                    <Lock size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
                     <input
+                      id="login-password"
                       type="password"
+                      autoComplete="current-password"
                       value={password}
                       onChange={e => setPassword(e.target.value)}
                       className="input-field pl-11"
diff --git a/src/pages/Register.jsx b/src/pages/Register.jsx
index e00197e..82ffa68 100644
--- a/src/pages/Register.jsx
+++ b/src/pages/Register.jsx
@@ -104,11 +104,13 @@ export default function Register() {
 
           <form onSubmit={handleSubmit} className="space-y-5">
             <div>
-              <label className="block text-sm font-medium text-th-text mb-1.5">{t('auth.username')}</label>
+              <label htmlFor="register-username" className="block text-sm font-medium text-th-text mb-1.5">{t('auth.username')}</label>
               <div className="relative">
-                <User size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" />
+                <User size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
                 <input
+                  id="register-username"
                   type="text"
+                  autoComplete="username"
                   value={username}
                   onChange={e => setUsername(e.target.value)}
                   className="input-field pl-11"
@@ -120,11 +122,13 @@ export default function Register() {
             </div>
 
             <div>
-              <label className="block text-sm font-medium text-th-text mb-1.5">{t('auth.displayName')}</label>
+              <label htmlFor="register-display-name" className="block text-sm font-medium text-th-text mb-1.5">{t('auth.displayName')}</label>
               <div className="relative">
-                <User size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" />
+                <User size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
                 <input
+                  id="register-display-name"
                   type="text"
+                  autoComplete="name"
                   value={displayName}
                   onChange={e => setDisplayName(e.target.value)}
                   className="input-field pl-11"
@@ -135,11 +139,13 @@ export default function Register() {
             </div>
 
             <div>
-              <label className="block text-sm font-medium text-th-text mb-1.5">{t('auth.email')}</label>
+              <label htmlFor="register-email" className="block text-sm font-medium text-th-text mb-1.5">{t('auth.email')}</label>
               <div className="relative">
-                <Mail size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" />
+                <Mail size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
                 <input
+                  id="register-email"
                   type="email"
+                  autoComplete="email"
                   value={email}
                   onChange={e => setEmail(e.target.value)}
                   className="input-field pl-11"
@@ -150,11 +156,13 @@ export default function Register() {
             </div>
 
             <div>
-              <label className="block text-sm font-medium text-th-text mb-1.5">{t('auth.password')}</label>
+              <label htmlFor="register-password" className="block text-sm font-medium text-th-text mb-1.5">{t('auth.password')}</label>
               <div className="relative">
-                <Lock size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" />
+                <Lock size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
                 <input
+                  id="register-password"
                   type="password"
+                  autoComplete="new-password"
                   value={password}
                   onChange={e => setPassword(e.target.value)}
                   className="input-field pl-11"
@@ -166,11 +174,13 @@ export default function Register() {
             </div>
 
             <div>
-              <label className="block text-sm font-medium text-th-text mb-1.5">{t('auth.confirmPassword')}</label>
+              <label htmlFor="register-confirm-password" className="block text-sm font-medium text-th-text mb-1.5">{t('auth.confirmPassword')}</label>
               <div className="relative">
-                <Lock size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" />
+                <Lock size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
                 <input
+                  id="register-confirm-password"
                   type="password"
+                  autoComplete="new-password"
                   value={confirmPassword}
                   onChange={e => setConfirmPassword(e.target.value)}
                   className="input-field pl-11"
diff --git a/src/pages/RoomDetail.jsx b/src/pages/RoomDetail.jsx
index c94cb85..d1e7fb3 100644
--- a/src/pages/RoomDetail.jsx
+++ b/src/pages/RoomDetail.jsx
@@ -580,8 +580,9 @@ export default function RoomDetail() {
       {activeTab === 'settings' && isOwner && editRoom && (
         <form onSubmit={handleSaveSettings} className="card p-6 space-y-5 max-w-2xl">
           <div>
-            <label className="block text-sm font-medium text-th-text mb-1.5">{t('dashboard.roomName')}</label>
+            <label htmlFor="room-settings-name" className="block text-sm font-medium text-th-text mb-1.5">{t('dashboard.roomName')}</label>
             <input
+              id="room-settings-name"
               type="text"
               value={editRoom.name}
               onChange={e => setEditRoom({ ...editRoom, name: e.target.value })}
@@ -592,8 +593,9 @@ export default function RoomDetail() {
           </div>
 
           <div>
-            <label className="block text-sm font-medium text-th-text mb-1.5">{t('room.welcomeMsg')}</label>
+            <label htmlFor="room-settings-welcome" className="block text-sm font-medium text-th-text mb-1.5">{t('room.welcomeMsg')}</label>
             <textarea
+              id="room-settings-welcome"
               value={editRoom.welcome_message || ''}
               onChange={e => setEditRoom({ ...editRoom, welcome_message: e.target.value })}
               className="input-field resize-none"
@@ -603,8 +605,9 @@ export default function RoomDetail() {
 
           <div className="grid grid-cols-2 gap-4">
             <div>
-              <label className="block text-sm font-medium text-th-text mb-1.5">{t('room.maxParticipants')}</label>
+              <label htmlFor="room-settings-max" className="block text-sm font-medium text-th-text mb-1.5">{t('room.maxParticipants')}</label>
               <input
+                id="room-settings-max"
                 type="number"
                 value={editRoom.max_participants}
                 onChange={e => setEditRoom({ ...editRoom, max_participants: parseInt(e.target.value) || 0 })}
@@ -613,8 +616,9 @@ export default function RoomDetail() {
               />
             </div>
             <div>
-              <label className="block text-sm font-medium text-th-text mb-1.5">{t('room.accessCode')}</label>
+              <label htmlFor="room-settings-access-code" className="block text-sm font-medium text-th-text mb-1.5">{t('room.accessCode')}</label>
               <input
+                id="room-settings-access-code"
                 type="text"
                 value={editRoom.access_code || ''}
                 onChange={e => setEditRoom({ ...editRoom, access_code: e.target.value })}
@@ -681,8 +685,9 @@ export default function RoomDetail() {
             </label>
             {!!editRoom.learning_analytics && (
               <div className="ml-7">
-                <label className="block text-xs font-medium text-th-text-s mb-1">{t('room.analyticsVisibility')}</label>
+                <label htmlFor="room-settings-analytics-visibility" className="block text-xs font-medium text-th-text-s mb-1">{t('room.analyticsVisibility')}</label>
                 <select
+                  id="room-settings-analytics-visibility"
                   value={editRoom.analytics_visibility || 'owner'}
                   onChange={e => setEditRoom({ ...editRoom, analytics_visibility: e.target.value })}
                   className="input-field text-sm py-1.5 max-w-xs"
@@ -700,8 +705,9 @@ export default function RoomDetail() {
             <h3 className="text-sm font-semibold text-th-text">{t('room.guestAccessTitle')}</h3>
 
             <div>
-              <label className="block text-sm font-medium text-th-text mb-1.5">{t('room.moderatorCode')}</label>
+              <label htmlFor="room-settings-moderator-code" className="block text-sm font-medium text-th-text mb-1.5">{t('room.moderatorCode')}</label>
               <input
+                id="room-settings-moderator-code"
                 type="text"
                 value={editRoom.moderator_code || ''}
                 onChange={e => setEditRoom({ ...editRoom, moderator_code: e.target.value })}
@@ -883,8 +889,9 @@ export default function RoomDetail() {
           <p className="text-sm text-th-text-s mb-4">{t('federation.inviteSubtitle')}</p>
           <form onSubmit={handleFedInvite} className="space-y-4">
             <div>
-              <label className="block text-sm font-medium text-th-text mb-1.5">{t('federation.addressLabel')}</label>
+              <label htmlFor="fed-invite-address" className="block text-sm font-medium text-th-text mb-1.5">{t('federation.addressLabel')}</label>
               <input
+                id="fed-invite-address"
                 type="text"
                 value={fedAddress}
                 onChange={e => { setFedAddress(e.target.value); if (e.target.value) setFedEmails(''); }}
@@ -902,8 +909,9 @@ export default function RoomDetail() {
             </div>
 
             <div>
-              <label className="block text-sm font-medium text-th-text mb-1.5">{t('federation.emailLabel')}</label>
+              <label htmlFor="fed-invite-emails" className="block text-sm font-medium text-th-text mb-1.5">{t('federation.emailLabel')}</label>
               <input
+                id="fed-invite-emails"
                 type="text"
                 value={fedEmails}
                 onChange={e => { setFedEmails(e.target.value); if (e.target.value) setFedAddress(''); }}
@@ -915,8 +923,9 @@ export default function RoomDetail() {
             </div>
 
             <div>
-              <label className="block text-sm font-medium text-th-text mb-1.5">{t('federation.messageLabel')}</label>
+              <label htmlFor="fed-invite-message" className="block text-sm font-medium text-th-text mb-1.5">{t('federation.messageLabel')}</label>
               <textarea
+                id="fed-invite-message"
                 value={fedMessage}
                 onChange={e => setFedMessage(e.target.value)}
                 className="input-field resize-none"
diff --git a/src/pages/Settings.jsx b/src/pages/Settings.jsx
index 7894839..2cd04dd 100644
--- a/src/pages/Settings.jsx
+++ b/src/pages/Settings.jsx
@@ -301,7 +301,7 @@ export default function Settings() {
                     {user?.avatar_image ? (
                       <img
                         src={`${api.defaults.baseURL}/auth/avatar/${user.avatar_image}`}
-                        alt="Avatar"
+                        alt=""
                         className="w-16 h-16 rounded-full object-cover"
                       />
                     ) : (
@@ -316,6 +316,7 @@ export default function Settings() {
                       type="button"
                       onClick={() => fileInputRef.current?.click()}
                       disabled={uploadingAvatar}
+                      aria-label={t('settings.uploadImage')}
                       className="absolute inset-0 rounded-full bg-black/50 flex items-center justify-center opacity-0 group-hover:opacity-100 transition-opacity cursor-pointer"
                     >
                       {uploadingAvatar ? (
@@ -360,12 +361,15 @@ export default function Settings() {
 
               {/* Avatar Color (fallback) */}
               <div className="mb-6">
-                <label className="block text-sm font-medium text-th-text mb-3">{t('settings.avatarColor')}</label>
-                <div className="flex flex-wrap gap-2">
+                <p id="avatar-color-label" className="block text-sm font-medium text-th-text mb-3">{t('settings.avatarColor')}</p>
+                <div role="radiogroup" aria-labelledby="avatar-color-label" className="flex flex-wrap gap-2">
                   {avatarColors.map(color => (
                     <button
                       key={color}
                       onClick={() => handleAvatarColor(color)}
+                      role="radio"
+                      aria-checked={user?.avatar_color === color}
+                      aria-label={color}
                       className={`w-7 h-7 rounded-full ring-2 ring-offset-2 transition-all ${
                         user?.avatar_color === color ? 'ring-th-accent' : 'ring-transparent hover:ring-th-border'
                       }`}
@@ -378,11 +382,13 @@ export default function Settings() {
 
               <form onSubmit={handleProfileSave} className="space-y-4">
                 <div>
-                  <label className="block text-sm font-medium text-th-text mb-1.5">{t('auth.username')}</label>
+                  <label htmlFor="settings-username" className="block text-sm font-medium text-th-text mb-1.5">{t('auth.username')}</label>
                   <div className="relative">
-                    <User size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" />
+                    <User size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
                     <input
+                      id="settings-username"
                       type="text"
+                      autoComplete="username"
                       value={profile.name}
                       onChange={e => setProfile({ ...profile, name: e.target.value })}
                       className="input-field pl-11"
@@ -392,11 +398,13 @@ export default function Settings() {
                   <p className="text-xs text-th-text-s mt-1">{t('auth.usernameHint')}</p>
                 </div>
                 <div>
-                  <label className="block text-sm font-medium text-th-text mb-1.5">{t('auth.displayName')}</label>
+                  <label htmlFor="settings-display-name" className="block text-sm font-medium text-th-text mb-1.5">{t('auth.displayName')}</label>
                   <div className="relative">
-                    <User size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" />
+                    <User size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
                     <input
+                      id="settings-display-name"
                       type="text"
+                      autoComplete="name"
                       value={profile.display_name}
                       onChange={e => setProfile({ ...profile, display_name: e.target.value })}
                       className="input-field pl-11"
@@ -404,11 +412,13 @@ export default function Settings() {
                   </div>
                 </div>
                 <div>
-                  <label className="block text-sm font-medium text-th-text mb-1.5">{t('auth.email')}</label>
+                  <label htmlFor="settings-email" className="block text-sm font-medium text-th-text mb-1.5">{t('auth.email')}</label>
                   <div className="relative">
-                    <Mail size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" />
+                    <Mail size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
                     <input
+                      id="settings-email"
                       type="email"
+                      autoComplete="email"
                       value={profile.email}
                       onChange={e => setProfile({ ...profile, email: e.target.value })}
                       className="input-field pl-11"
@@ -430,11 +440,13 @@ export default function Settings() {
               <h2 className="text-lg font-semibold text-th-text mb-6">{t('settings.changePassword')}</h2>
               <form onSubmit={handlePasswordSave} className="space-y-4">
                 <div>
-                  <label className="block text-sm font-medium text-th-text mb-1.5">{t('settings.currentPassword')}</label>
+                  <label htmlFor="settings-current-password" className="block text-sm font-medium text-th-text mb-1.5">{t('settings.currentPassword')}</label>
                   <div className="relative">
-                    <Lock size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" />
+                    <Lock size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
                     <input
+                      id="settings-current-password"
                       type="password"
+                      autoComplete="current-password"
                       value={passwords.currentPassword}
                       onChange={e => setPasswords({ ...passwords, currentPassword: e.target.value })}
                       className="input-field pl-11"
@@ -443,11 +455,13 @@ export default function Settings() {
                   </div>
                 </div>
                 <div>
-                  <label className="block text-sm font-medium text-th-text mb-1.5">{t('settings.newPassword')}</label>
+                  <label htmlFor="settings-new-password" className="block text-sm font-medium text-th-text mb-1.5">{t('settings.newPassword')}</label>
                   <div className="relative">
-                    <Lock size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" />
+                    <Lock size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
                     <input
+                      id="settings-new-password"
                       type="password"
+                      autoComplete="new-password"
                       value={passwords.newPassword}
                       onChange={e => setPasswords({ ...passwords, newPassword: e.target.value })}
                       className="input-field pl-11"
@@ -458,11 +472,13 @@ export default function Settings() {
                   </div>
                 </div>
                 <div>
-                  <label className="block text-sm font-medium text-th-text mb-1.5">{t('settings.confirmNewPassword')}</label>
+                  <label htmlFor="settings-confirm-new-password" className="block text-sm font-medium text-th-text mb-1.5">{t('settings.confirmNewPassword')}</label>
                   <div className="relative">
-                    <Lock size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" />
+                    <Lock size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
                     <input
+                      id="settings-confirm-new-password"
                       type="password"
+                      autoComplete="new-password"
                       value={passwords.confirmPassword}
                       onChange={e => setPasswords({ ...passwords, confirmPassword: e.target.value })}
                       className="input-field pl-11"
@@ -514,11 +530,13 @@ export default function Settings() {
                       <form onSubmit={handleDisable2FA} className="space-y-4 p-4 rounded-xl bg-th-bg-t border border-th-border">
                         <p className="text-sm text-th-text-s">{t('settings.security.disableConfirm')}</p>
                         <div>
-                          <label className="block text-sm font-medium text-th-text mb-1.5">{t('settings.currentPassword')}</label>
+                          <label htmlFor="twofa-disable-password" className="block text-sm font-medium text-th-text mb-1.5">{t('settings.currentPassword')}</label>
                           <div className="relative">
-                            <Lock size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" />
+                            <Lock size={18} className="absolute left-3.5 top-1/2 -translate-y-1/2 text-th-text-s" aria-hidden="true" />
                             <input
+                              id="twofa-disable-password"
                               type="password"
+                              autoComplete="current-password"
                               value={twoFaDisablePassword}
                               onChange={e => setTwoFaDisablePassword(e.target.value)}
                               className="input-field pl-11"
@@ -527,8 +545,9 @@ export default function Settings() {
                           </div>
                         </div>
                         <div>
-                          <label className="block text-sm font-medium text-th-text mb-1.5">{t('settings.security.codeLabel')}</label>
+                          <label htmlFor="twofa-disable-code" className="block text-sm font-medium text-th-text mb-1.5">{t('settings.security.codeLabel')}</label>
                           <input
+                            id="twofa-disable-code"
                             type="text"
                             inputMode="numeric"
                             autoComplete="one-time-code"
@@ -570,6 +589,7 @@ export default function Settings() {
                         <button
                           onClick={() => { navigator.clipboard.writeText(twoFaSetupData.secret); toast.success(t('room.linkCopied')); }}
                           className="btn-ghost py-1.5 px-2 shrink-0"
+                          aria-label={t('room.copyLink')}
                         >
                           <Copy size={14} />
                         </button>
@@ -577,8 +597,9 @@ export default function Settings() {
                     </div>
                     <form onSubmit={handleEnable2FA} className="space-y-3">
                       <div>
-                        <label className="block text-sm font-medium text-th-text mb-1.5">{t('settings.security.verifyCode')}</label>
+                        <label htmlFor="twofa-enable-code" className="block text-sm font-medium text-th-text mb-1.5">{t('settings.security.verifyCode')}</label>
                         <input
+                          id="twofa-enable-code"
                           type="text"
                           inputMode="numeric"
                           autoComplete="one-time-code"