diff --git a/src/App.tsx b/src/App.tsx
index 5b8d12f..e751e19 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1056,7 +1056,7 @@ function App() {
         />
       )}
       <div
-        className={`app-sidebar-shell relative z-20 shrink-0 transition-all duration-300 ease-[cubic-bezier(0.2,0.8,0.2,1)] ${
+        className={`app-sidebar-shell relative z-20 shrink-0 transition-[width,margin-inline-start,margin-inline-end,opacity] duration-300 ease-[cubic-bezier(0.2,0.8,0.2,1)] ${
           isSidebarOnRight ? 'app-sidebar-shell--right' : 'app-sidebar-shell--left'
         } ${
           isSidebarVisible ? 'opacity-100' : 'opacity-0 pointer-events-none'
diff --git a/src/components/DownloadItem.tsx b/src/components/DownloadItem.tsx
index 66b320d..f9b99ca 100644
--- a/src/components/DownloadItem.tsx
+++ b/src/components/DownloadItem.tsx
@@ -279,7 +279,7 @@ export const DownloadItem = React.memo<DownloadItemProps>(({
             >
               {(download.status === 'queued' || download.status === 'staged') && queueIndex !== -1 ? (
                 <>
-                  <Clock size={12} className={download.status === 'queued' ? 'animate-pulse shrink-0' : 'shrink-0'} />
+                  <Clock size={12} className={download.status === 'queued' ? 'animate-pulse motion-reduce:animate-none shrink-0' : 'shrink-0'} />
                   <span className="truncate">
                     {downloadStatusLabel} #{queueIndex + 1}
                   </span>
diff --git a/src/components/DownloadTable.tsx b/src/components/DownloadTable.tsx
index 8f97d32..2b589de 100644
--- a/src/components/DownloadTable.tsx
+++ b/src/components/DownloadTable.tsx
@@ -2307,13 +2307,17 @@ export const DownloadTable: React.FC<DownloadTableProps> = ({ filter, onSummaryC
 
               {itemsToQueue.length > 0 && (
                 <div className="group relative">
-                  <button className="w-full text-left px-3 py-2 hover:bg-item-hover transition-colors flex justify-between items-center">
+                  <button
+                    type="button"
+                    aria-haspopup="menu"
+                    className="w-full text-left px-3 py-2 hover:bg-item-hover transition-colors flex justify-between items-center"
+                  >
                     {t($ => $.downloadTable.addToQueue)}
                     <ChevronRight size={14} className="download-context-menu-chevron" />
                   </button>
-                  <div className="download-context-submenu absolute top-0 hidden group-hover:block min-w-[150px] bg-bg-modal border border-border-modal rounded-lg shadow-lg py-1.5 z-50">
+                  <div className="download-context-submenu absolute top-0 min-w-[150px] bg-bg-modal border border-border-modal rounded-lg shadow-lg py-1.5 z-50" role="menu">
                     {queues.map(q => (
-                      <button key={q.id} onClick={() => {
+                      <button key={q.id} role="menuitem" onClick={() => {
                         setContextMenu(null);
                         void assignToQueue(itemsToQueue.map(item => item.id), q.id).catch(error => {
                           showInteractionError(t($ => $.downloadTable.moveManyFailed), error);
@@ -2426,13 +2430,17 @@ export const DownloadTable: React.FC<DownloadTableProps> = ({ filter, onSummaryC
 
               {contextItem.status !== 'completed' && (
                 <div className="group relative">
-                  <button className="w-full text-left px-3 py-2 hover:bg-item-hover transition-colors flex justify-between items-center">
+                  <button
+                    type="button"
+                    aria-haspopup="menu"
+                    className="w-full text-left px-3 py-2 hover:bg-item-hover transition-colors flex justify-between items-center"
+                  >
                     {t($ => $.downloadTable.addToQueue)}
                     <ChevronRight size={14} className="download-context-menu-chevron" />
                   </button>
-                  <div className="download-context-submenu absolute top-0 hidden group-hover:block min-w-[150px] bg-bg-modal border border-border-modal rounded-lg shadow-lg py-1.5 z-50">
+                  <div className="download-context-submenu absolute top-0 min-w-[150px] bg-bg-modal border border-border-modal rounded-lg shadow-lg py-1.5 z-50" role="menu">
                     {queues.map(q => (
-                      <button key={q.id} onClick={() => {
+                      <button key={q.id} role="menuitem" onClick={() => {
                         setContextMenu(null);
                         void assignToQueue([contextItem.id], q.id).catch(error => {
                           showInteractionError(t($ => $.downloadTable.moveOneFailed), error);
diff --git a/src/components/KeychainPermissionModal.tsx b/src/components/KeychainPermissionModal.tsx
index 78da33f..deac59c 100644
--- a/src/components/KeychainPermissionModal.tsx
+++ b/src/components/KeychainPermissionModal.tsx
@@ -207,7 +207,7 @@ export const KeychainPermissionModal: React.FC<KeychainPermissionModalProps> = (
           <button
             onClick={handleGrant}
             disabled={isGranting || grantRequestPending}
-            className="px-4 py-2 rounded-lg text-sm font-medium transition-colors bg-accent text-white hover:bg-accent/90 disabled:opacity-50"
+            className="px-4 py-2 rounded-lg text-sm font-medium transition-colors bg-accent text-accent-foreground hover:bg-accent/90 disabled:opacity-50"
           >
             {isGranting || grantRequestPending ? t($ => $.keychain.enabling) : grantLabel}
           </button>
diff --git a/src/components/SchedulerView.tsx b/src/components/SchedulerView.tsx
index 19a22ae..f47a578 100644
--- a/src/components/SchedulerView.tsx
+++ b/src/components/SchedulerView.tsx
@@ -342,7 +342,7 @@ export default function SchedulerView() {
                       disabled={!draft.enabled}
                       onClick={() => toggleDay(day.value)}
                       className={`h-8 w-8 rounded-full text-[12px] font-semibold ${
-                        selected ? 'bg-accent text-white' : 'bg-bg-input text-text-primary hover:bg-item-hover'
+                        selected ? 'bg-accent text-accent-foreground' : 'bg-bg-input text-text-primary hover:bg-item-hover'
                       }`}
                     >
                       {t($ => $.scheduler.days[day.key])}
diff --git a/src/components/SettingsView.tsx b/src/components/SettingsView.tsx
index 7a1cbb8..7187b0b 100644
--- a/src/components/SettingsView.tsx
+++ b/src/components/SettingsView.tsx
@@ -725,10 +725,11 @@ runEngineChecks(false);
       <button
         type="button"
         data-active={active}
+        aria-current={active ? 'page' : undefined}
         onClick={() => settings.setActiveSettingsTab(type)}
-        className={`settings-tab-button flex min-w-0 flex-1 flex-col items-center justify-center px-1 text-center cursor-default ${
+        className={`settings-tab-button flex min-w-0 flex-1 flex-col items-center justify-center px-1 text-center cursor-pointer ${
           active
-            ? 'text-white'
+            ? 'text-accent-foreground'
             : 'text-text-primary hover:bg-item-hover'
         }`}
       >
@@ -755,6 +756,7 @@ runEngineChecks(false);
         {/* Content Area */}
         <div className="settings-scroll flex-1 overflow-y-auto">
           <div className="settings-content-shell w-full">
+            <div key={activeTab} className="settings-page-transition">
             <h1 className="settings-title text-text-primary">{activeTabLabel}</h1>
             <div className="settings-content max-w-[720px]">
 
@@ -1448,7 +1450,7 @@ runEngineChecks(false);
                     type="button"
                     onClick={handleAddLogin}
                     disabled={isSavingLogin}
-                    className="bg-accent hover:bg-accent text-white px-4 py-1.5 rounded-lg text-xs font-semibold shadow flex items-center gap-1.5"
+                    className="bg-accent hover:bg-accent text-accent-foreground px-4 py-1.5 rounded-lg text-xs font-semibold shadow flex items-center gap-1.5"
                   >
                     <Plus size={14} /> {isSavingLogin ? t($ => $.settings.siteLogins.saving) : t($ => $.settings.siteLogins.addLogin)}
                   </button>
@@ -1611,7 +1613,7 @@ className="app-button px-3 py-1.5 text-[12px] flex items-center gap-1.5 disabled
                     </p>
                     <button 
                       onClick={() => settings.setShowKeychainModal(true)}
-                      className="px-4 py-1.5 rounded-md text-xs font-medium transition-colors bg-accent text-white hover:bg-accent/90 shadow-sm"
+                      className="px-4 py-1.5 rounded-md text-xs font-medium transition-colors bg-accent text-accent-foreground hover:bg-accent/90 shadow-sm"
                     >
                     {platform.portable ? t($ => $.settings.integrations.reviewPortablePairing) : t($ => $.settings.integrations.grantCredentialAccess)}
                     </button>
@@ -1635,7 +1637,7 @@ className="app-button px-3 py-1.5 text-[12px] flex items-center gap-1.5 disabled
                   <div className="space-y-2">
                     <button
                       onClick={() => void copyToken()}
-                      className="w-full bg-accent hover:bg-accent text-white font-medium py-1 px-2 rounded text-[11px] flex items-center justify-center gap-1 shadow transition-colors"
+                      className="w-full bg-accent hover:bg-accent text-accent-foreground font-medium py-1 px-2 rounded text-[11px] flex items-center justify-center gap-1 shadow transition-colors"
                     >
                       <Copy size={11} /> {t($ => $.settings.integrations.copyToken)}
                     </button>
@@ -1798,7 +1800,7 @@ className="app-button px-3 py-1.5 text-[12px] flex items-center gap-1.5 disabled
                       role="switch"
                       aria-checked={settings.autoCheckUpdates}
                       onClick={() => settings.setAutoCheckUpdates(!settings.autoCheckUpdates)}
-                      className={`relative inline-flex h-5 w-9 shrink-0 cursor-default items-center rounded-full transition-colors duration-200 ease-in-out border border-transparent ${settings.autoCheckUpdates ? 'bg-accent' : 'bg-border-color'}`}
+                      className={`relative inline-flex h-5 w-9 shrink-0 cursor-pointer items-center rounded-full transition-colors duration-200 ease-in-out border border-transparent ${settings.autoCheckUpdates ? 'bg-accent' : 'bg-border-color'}`}
                     >
                       <span className={`pointer-events-none inline-block h-4 w-4 transform rounded-full bg-white shadow transition duration-200 ease-in-out ${settings.autoCheckUpdates ? 'translate-x-4' : 'translate-x-0'}`} />
                     </button>
@@ -1829,6 +1831,7 @@ className="app-button px-3 py-1.5 text-[12px] flex items-center gap-1.5 disabled
           )}
 
             </div>
+            </div>
           </div>
         </div>
 
diff --git a/src/components/Sidebar.tsx b/src/components/Sidebar.tsx
index 38ea7c7..d7f480e 100644
--- a/src/components/Sidebar.tsx
+++ b/src/components/Sidebar.tsx
@@ -426,7 +426,7 @@ export const Sidebar: React.FC<SidebarProps> = (props) => {
           onClick={() => setActiveView('settings')}
           className="sidebar-nav-item sidebar-settings-button group flex w-full items-center text-[13px] text-start cursor-default font-medium transition-colors"
         >
-          <Settings className={`w-[18px] h-[18px] me-3 shrink-0 ${activeView === 'settings' ? 'text-white' : 'text-text-muted'}`} strokeWidth={activeView === 'settings' ? 2.5 : 2} />
+          <Settings className={`w-[18px] h-[18px] me-3 shrink-0 ${activeView === 'settings' ? 'text-accent-foreground' : 'text-text-muted'}`} strokeWidth={activeView === 'settings' ? 2.5 : 2} />
           <span className="sidebar-nav-label">{t($ => $.navigation.settings)}</span>
         </button>
       </div>
diff --git a/src/components/SpeedLimiterView.tsx b/src/components/SpeedLimiterView.tsx
index 3445eec..d609c0e 100644
--- a/src/components/SpeedLimiterView.tsx
+++ b/src/components/SpeedLimiterView.tsx
@@ -250,7 +250,7 @@ export default function SpeedLimiterView() {
                   disabled={!enabled || isSaving}
                   onClick={() => changeUnit(option)}
                   className={`rounded px-3 py-1.5 text-[12px] font-medium ${
-                    unit === option ? 'bg-accent text-white' : 'text-text-secondary hover:bg-item-hover'
+                    unit === option ? 'bg-accent text-accent-foreground' : 'text-text-secondary hover:bg-item-hover'
                   }`}
                 >
                   {option}
diff --git a/src/index.css b/src/index.css
index 96ca4fc..d18c0b4 100644
--- a/src/index.css
+++ b/src/index.css
@@ -11,11 +11,13 @@
   --item-hover: 0 0% 0% / 0.05;
   --item-selected: 211 100% 50%;
   --accent-color: 211 100% 50%;
+  --accent-foreground: 220 20% 8%;
   --stripe-bg: 0 0% 0% / 0.035;
 
   --text-primary: 0 0% 10%;
-  --text-secondary: 0 0% 40%;
-  --text-muted: 0 0% 55%;
+  /* Supporting text stays readable on light surfaces while retaining a cool neutral hierarchy. */
+  --text-secondary: 220 12% 34%;
+  --text-muted: 220 10% 44%;
   --bg-modal: 0 0% 100%;
   --bg-input: 0 0% 100%;
   --border-modal: 0 0% 85%;
@@ -54,10 +56,12 @@
   --item-hover: 0 0% 0% / 0.05;
   --item-selected: 211 100% 50%;
   --accent-color: 211 100% 50%;
+  --accent-foreground: 220 20% 8%;
   --stripe-bg: 0 0% 0% / 0.035;
   --text-primary: 0 0% 10%;
-  --text-secondary: 0 0% 40%;
-  --text-muted: 0 0% 55%;
+  /* Supporting text stays readable on light surfaces while retaining a cool neutral hierarchy. */
+  --text-secondary: 220 12% 34%;
+  --text-muted: 220 10% 44%;
   --bg-modal: 0 0% 100%;
   --bg-input: 0 0% 100%;
   --border-modal: 0 0% 85%;
@@ -84,10 +88,11 @@
   --item-hover: 0 0% 100% / 0.07;
   --item-selected: 211 100% 56%;
   --accent-color: 211 100% 56%;
+  --accent-foreground: 220 20% 12%;
   --stripe-bg: 0 0% 100% / 0.025;
   --text-primary: 0 0% 91%;
   --text-secondary: 0 0% 75%;
-  --text-muted: 0 0% 50%;
+  --text-muted: 0 0% 60%;
   --bg-modal: 0 0% 13%;
   --bg-input: 0 0% 16%;
   --shadow-color: 0 0% 0% / 0.30;
@@ -128,10 +133,11 @@
   --item-hover: 326 100% 74% / 0.10;
   --item-selected: 326 100% 74%;
   --accent-color: 326 100% 74%;
+  --accent-foreground: 220 20% 12%;
   --stripe-bg: 0 0% 100% / 0.025;
   --text-primary: 60 30% 96%;
   --text-secondary: 228 14% 74%;
-  --text-muted: 229 12% 58%;
+  --text-muted: 229 12% 66%;
   --bg-modal: 232 14% 23%;
   --bg-input: 231 15% 20%;
   --shadow-color: 231 20% 8% / 0.35;
@@ -172,10 +178,11 @@
   --item-hover: 193 43% 67% / 0.12;
   --item-selected: 193 43% 67%;
   --accent-color: 193 43% 67%;
+  --accent-foreground: 220 20% 12%;
   --stripe-bg: 0 0% 100% / 0.025;
   --text-primary: 218 27% 92%;
   --text-secondary: 219 28% 80%;
-  --text-muted: 218 17% 63%;
+  --text-muted: 218 17% 70%;
   --bg-modal: 220 17% 27%;
   --bg-input: 220 16% 24%;
   --shadow-color: 220 25% 10% / 0.34;
@@ -209,6 +216,7 @@
   --color-sidebar-glass: hsl(var(--sidebar-glass));
   --color-main-bg: hsl(var(--main-bg));
   --color-accent: hsl(var(--accent-color));
+  --color-accent-foreground: hsl(var(--accent-foreground));
   --color-border-color: hsl(var(--border-color));
   --color-item-hover: hsl(var(--item-hover));
   --color-item-selected: hsl(var(--item-selected));
@@ -526,7 +534,7 @@ html[data-list-density="relaxed"] {
   .app-button-primary {
     border-color: transparent;
     background: var(--color-accent);
-    color: white;
+    color: var(--color-accent-foreground);
   }
 
   .app-button-primary:hover:not(:disabled) {
@@ -1083,7 +1091,7 @@ html[data-list-density="relaxed"] {
     background:
       linear-gradient(180deg, hsl(0 0% 100% / 0.16), transparent 52%),
       hsl(var(--accent-color));
-    color: white;
+    color: hsl(var(--accent-foreground));
     box-shadow:
       inset 0 1px 0 hsl(0 0% 100% / 0.18),
       0 1px 2px hsl(var(--accent-color) / 0.32);
@@ -1413,19 +1421,19 @@ html[data-list-density="relaxed"] {
 
   .sidebar-nav-item[data-active="true"] {
     background: hsl(var(--accent-color)) !important;
-    color: white !important;
+    color: hsl(var(--accent-foreground)) !important;
     box-shadow:
       inset 0 1px 0 hsl(0 0% 100% / 0.12),
       0 1px 0 hsl(0 0% 0% / 0.10);
   }
 
   .sidebar-nav-item[data-active="true"] svg {
-    color: white !important;
+    color: hsl(var(--accent-foreground)) !important;
   }
 
   .sidebar-nav-item[data-active="true"] .sidebar-count {
-    color: white !important;
-    background: hsl(0 0% 100% / 0.16) !important;
+    color: hsl(var(--accent-foreground)) !important;
+    background: hsl(var(--accent-foreground) / 0.16) !important;
   }
 
   .sidebar-nav-item:not([data-active="true"]):hover {
@@ -1468,6 +1476,9 @@ html[data-list-density="relaxed"] {
     padding: 7px 10px;
     border-top: 1px solid hsl(var(--sidebar-border));
     background: hsl(var(--sidebar-hover));
+    border-bottom-right-radius: calc(var(--window-corner-radius) - 1px);
+    border-bottom-left-radius: calc(var(--window-corner-radius) - 1px);
+    overflow: hidden;
   }
 
   .sidebar-settings-button {
@@ -1607,13 +1618,26 @@ html[data-list-density="relaxed"] {
   .settings-tab-button {
     min-height: 64px;
     border-radius: 8px;
-    transition: none;
+    transition:
+      background-color 140ms ease,
+      color 140ms ease,
+      box-shadow 160ms ease,
+      transform 160ms cubic-bezier(0.2, 0.8, 0.2, 1);
+  }
+
+  .settings-tab-button:active {
+    transform: scale(0.98);
+  }
+
+  .settings-tab-button:focus-visible {
+    outline: none;
+    box-shadow: 0 0 0 3px hsl(var(--accent-color) / 0.24);
   }
 
   .settings-tab-button[data-active="true"] {
     background: hsl(var(--accent-color));
     box-shadow: none;
-    color: white;
+    color: hsl(var(--accent-foreground));
   }
 
   .settings-pane {
@@ -1625,6 +1649,11 @@ html[data-list-density="relaxed"] {
     padding: 32px;
   }
 
+  .settings-page-transition {
+    animation: settings-page-in 180ms cubic-bezier(0.2, 0.8, 0.2, 1);
+    transform-origin: top center;
+  }
+
   .settings-title {
     margin: 0 0 24px;
     font-size: 28px;
@@ -1634,7 +1663,8 @@ html[data-list-density="relaxed"] {
   }
 
   .settings-section-title {
-    margin: 0 0 7px 12px;
+    margin: 0 0 7px;
+    padding-inline-start: 12px;
     font-size: 12px;
     line-height: 1.2;
     font-weight: 600;
@@ -1763,6 +1793,8 @@ html[data-list-density="relaxed"] {
   box-shadow:
     0 18px 42px hsl(0 0% 0% / 0.28),
     inset 0 1px 0 hsl(0 0% 100% / 0.06);
+  animation: settings-menu-in 140ms cubic-bezier(0.2, 0.8, 0.2, 1);
+  transform-origin: top center;
 }
 
 .settings-combobox-option {
@@ -1841,6 +1873,11 @@ html[data-list-density="relaxed"] {
     box-shadow: 0 0 0 1px hsl(var(--accent-color));
   }
 
+  .theme-option:has(input:focus-visible) {
+    outline: 2px solid hsl(var(--accent-color) / 0.55);
+    outline-offset: 2px;
+  }
+
   .theme-option input {
     position: absolute;
     width: 1px;
@@ -1880,10 +1917,19 @@ html[data-list-density="relaxed"] {
     background: hsl(var(--border-color));
     border-radius: 20px;
     position: relative;
-    cursor: default;
+    cursor: pointer;
     outline: none;
     transition: background 0.2s ease;
   }
+
+  .mac-switch:focus-visible {
+    box-shadow: 0 0 0 3px hsl(var(--accent-color) / 0.24);
+  }
+
+  .mac-switch:disabled {
+    cursor: default;
+    opacity: 0.55;
+  }
   .mac-switch::after {
     content: '';
     position: absolute;
@@ -1907,6 +1953,15 @@ html[data-list-density="relaxed"] {
   button[role="switch"] {
     direction: ltr;
   }
+
+  button[role="switch"]:focus-visible {
+    outline: none;
+    box-shadow: 0 0 0 3px hsl(var(--accent-color) / 0.24);
+  }
+
+  button[role="switch"]:disabled {
+    opacity: 0.55;
+  }
 .downloads-view {
   background: hsl(var(--main-bg));
 }
@@ -2912,6 +2967,24 @@ body.is-queue-dragging * {
 .download-context-submenu {
   inset-inline-start: 100%;
   margin-inline-start: 0.25rem;
+  opacity: 0;
+  visibility: hidden;
+  pointer-events: none;
+  transform: translateY(-3px) scale(0.98);
+  transform-origin: top left;
+  transition:
+    opacity 120ms ease,
+    transform 160ms cubic-bezier(0.2, 0.8, 0.2, 1),
+    visibility 0s linear 120ms;
+}
+
+.group:hover > .download-context-submenu,
+.group:focus-within > .download-context-submenu {
+  opacity: 1;
+  visibility: visible;
+  pointer-events: auto;
+  transform: translateY(0) scale(1);
+  transition-delay: 0s;
 }
 
 .app-workspace--sidebar-right .download-context-submenu {
@@ -2919,6 +2992,7 @@ body.is-queue-dragging * {
   inset-inline-end: 100%;
   margin-inline-start: 0;
   margin-inline-end: 0.25rem;
+  transform-origin: top right;
 }
 
 html[dir="rtl"] .download-context-menu-chevron {
@@ -3175,6 +3249,28 @@ html[dir="rtl"] .download-context-menu-chevron {
   to { opacity: 1; }
 }
 
+@keyframes settings-page-in {
+  from {
+    opacity: 0;
+    transform: translateY(6px);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
+@keyframes settings-menu-in {
+  from {
+    opacity: 0;
+    transform: translateY(-3px) scale(0.98);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0) scale(1);
+  }
+}
+
 @keyframes modal-backdrop-in {
   from { background-color: hsl(0 0% 0% / 0); }
   to { background-color: hsl(0 0% 0% / 0.2); }