diff --git a/apps/web/src/components/BranchToolbar.tsx b/apps/web/src/components/BranchToolbar.tsx
index 62c5e20da9f820c421472507f1d77dd88b4598ea..c2db48184c7c8f19e07986072d7cc0e77c021e86 100644
--- a/apps/web/src/components/BranchToolbar.tsx
+++ b/apps/web/src/components/BranchToolbar.tsx
@@ -248,7 +248,7 @@ export const BranchToolbar = memo(function BranchToolbar({
   if (!hasActiveThread || !activeProject) return null;
 
   return (
-    <div className="chat-composer-context-strip -mt-2 mx-auto flex w-[calc(100%-1.5rem)] max-w-[calc(48rem-1.5rem)] items-center gap-2 pt-3 pe-2 pb-1 ps-2">
+    <div className="flex w-full items-center gap-2 border-t border-border/60 px-3 py-2">
       {isMobile ? (
         <MobileRunContextSelector
           envLocked={envLocked}
diff --git a/apps/web/src/components/ChatView.tsx b/apps/web/src/components/ChatView.tsx
index 974f204a8d460d30501a66e61aea7a844b478a2c..87520c6f84faee7a57971f59fb789df21cf36874 100644
--- a/apps/web/src/components/ChatView.tsx
+++ b/apps/web/src/components/ChatView.tsx
@@ -5569,125 +5569,125 @@ function ChatViewContent(props: ChatViewProps) {
                         : undefined
                     }
                   >
-                    <div
-                      ref={attachDraftHeroComposerAnchorRef}
-                      className="relative z-10 isolate mx-auto w-full max-w-3xl before:pointer-events-none before:absolute before:inset-x-0 before:bottom-0 before:-z-10 before:h-2 before:rounded-b-[22px] before:bg-background"
-                    >
-                      <ChatComposer
-                        composerRef={composerRef}
-                        composerDraftTarget={composerDraftTarget}
-                        environmentId={environmentId}
-                        routeKind={routeKind}
-                        routeThreadRef={routeThreadRef}
-                        draftId={draftId}
-                        activeThreadId={activeThreadId}
-                        activeThreadEnvironmentId={activeThread?.environmentId}
-                        activeThread={activeThread}
-                        isServerThread={isServerThread}
-                        isLocalDraftThread={isLocalDraftThread}
-                        forceExpandedOnMobile={forceExpandedMobileComposer && isDraftHeroState}
-                        projectSelectionRequired={isLocalDraftThread && activeProject === null}
-                        phase={phase}
-                        isConnecting={isConnecting}
-                        isSendBusy={isSendBusy}
-                        isPreparingWorktree={isPreparingWorktree}
-                        environmentUnavailable={activeEnvironmentUnavailableState}
-                        activePendingApproval={activePendingApproval}
-                        pendingApprovals={pendingApprovals}
-                        pendingUserInputs={pendingUserInputs}
-                        activePendingProgress={activePendingProgress}
-                        activePendingResolvedAnswers={activePendingResolvedAnswers}
-                        activePendingIsResponding={activePendingIsResponding}
-                        activePendingDraftAnswers={activePendingDraftAnswers}
-                        activePendingQuestionIndex={activePendingQuestionIndex}
-                        respondingRequestIds={respondingRequestIds}
-                        showPlanFollowUpPrompt={showPlanFollowUpPrompt}
-                        activeProposedPlan={activeProposedPlan}
-                        activePlan={activePlan as { turnId?: TurnId } | null}
-                        sidebarProposedPlan={sidebarProposedPlan as { turnId?: TurnId } | null}
-                        planSidebarLabel={planSidebarLabel}
-                        planSidebarOpen={planSidebarOpen}
-                        runtimeMode={runtimeMode}
-                        interactionMode={interactionMode}
-                        lockedProvider={lockedProvider}
-                        providerStatuses={providerStatuses as ServerProvider[]}
-                        activeProjectDefaultModelSelection={activeProject?.defaultModelSelection}
-                        activeThreadModelSelection={activeThread?.modelSelection}
-                        activeThreadActivities={activeThread?.activities}
-                        resolvedTheme={resolvedTheme}
-                        settings={settings}
-                        keybindings={keybindings}
-                        terminalOpen={Boolean(terminalUiState.terminalOpen)}
-                        gitCwd={gitCwd}
-                        promptRef={promptRef}
-                        composerImagesRef={composerImagesRef}
-                        composerTerminalContextsRef={composerTerminalContextsRef}
-                        composerElementContextsRef={composerElementContextsRef}
-                        onSend={onSend}
-                        onInterrupt={onInterrupt}
-                        onImplementPlanInNewThread={onImplementPlanInNewThread}
-                        onRespondToApproval={onRespondToApproval}
-                        onSelectActivePendingUserInputOption={onSelectActivePendingUserInputOption}
-                        onAdvanceActivePendingUserInput={onAdvanceActivePendingUserInput}
-                        onPreviousActivePendingUserInputQuestion={
-                          onPreviousActivePendingUserInputQuestion
-                        }
-                        onChangeActivePendingUserInputCustomAnswer={
-                          onChangeActivePendingUserInputCustomAnswer
-                        }
-                        onProviderModelSelect={onProviderModelSelect}
-                        getModelDisabledReason={getModelDisabledReason}
-                        toggleInteractionMode={toggleInteractionMode}
-                        handleRuntimeModeChange={handleRuntimeModeChange}
-                        handleInteractionModeChange={handleInteractionModeChange}
-                        togglePlanSidebar={togglePlanSidebar}
-                        focusComposer={focusComposer}
-                        scheduleComposerFocus={scheduleComposerFocus}
-                        setThreadError={setThreadError}
-                        onExpandImage={onExpandTimelineImage}
-                      />
-                    </div>
-                    <div
-                      className={cn(
-                        "min-h-0",
-                        isDraftHeroState ? "absolute inset-x-0 top-full" : null,
-                      )}
-                    >
-                      <div
-                        data-terminal-open={terminalUiState.terminalOpen ? "true" : undefined}
-                        className="chat-composer-lower-chrome relative z-0 pb-[calc(env(safe-area-inset-bottom)+1rem)] sm:pb-[calc(env(safe-area-inset-bottom)+1.25rem)]"
-                      >
-                        {isGitRepo && (
-                          <div className="pointer-events-auto">
-                            <BranchToolbar
-                              environmentId={activeThread.environmentId}
-                              threadId={activeThread.id}
-                              {...(routeKind === "draft" && draftId ? { draftId } : {})}
-                              onEnvModeChange={onEnvModeChange}
-                              startFromOrigin={startFromOrigin}
-                              onStartFromOriginChange={onStartFromOriginChange}
-                              {...(canOverrideServerThreadEnvMode
-                                ? { effectiveEnvModeOverride: envMode }
-                                : {})}
-                              {...(canOverrideServerThreadEnvMode
-                                ? {
-                                    activeThreadBranchOverride: activeThreadBranch,
-                                    onActiveThreadBranchOverrideChange:
-                                      setPendingServerThreadBranch,
-                                  }
-                                : {})}
-                              envLocked={envLocked}
-                              onComposerFocusRequest={scheduleComposerFocus}
-                              {...(canCheckoutPullRequestIntoThread
-                                ? { onCheckoutPullRequestRequest: openPullRequestDialog }
-                                : {})}
-                              {...(hasMultipleEnvironments ? { onEnvironmentChange } : {})}
-                              availableEnvironments={logicalProjectEnvironments}
-                            />
-                          </div>
-                        )}
+                    <div className="chat-composer-glass-host mx-auto w-full max-w-3xl overflow-hidden rounded-[22px]">
+                      <div ref={attachDraftHeroComposerAnchorRef} className="relative z-10 isolate">
+                        <ChatComposer
+                          composerRef={composerRef}
+                          composerDraftTarget={composerDraftTarget}
+                          environmentId={environmentId}
+                          routeKind={routeKind}
+                          routeThreadRef={routeThreadRef}
+                          draftId={draftId}
+                          activeThreadId={activeThreadId}
+                          activeThreadEnvironmentId={activeThread?.environmentId}
+                          activeThread={activeThread}
+                          isServerThread={isServerThread}
+                          isLocalDraftThread={isLocalDraftThread}
+                          forceExpandedOnMobile={forceExpandedMobileComposer && isDraftHeroState}
+                          projectSelectionRequired={isLocalDraftThread && activeProject === null}
+                          phase={phase}
+                          isConnecting={isConnecting}
+                          isSendBusy={isSendBusy}
+                          isPreparingWorktree={isPreparingWorktree}
+                          environmentUnavailable={activeEnvironmentUnavailableState}
+                          activePendingApproval={activePendingApproval}
+                          pendingApprovals={pendingApprovals}
+                          pendingUserInputs={pendingUserInputs}
+                          activePendingProgress={activePendingProgress}
+                          activePendingResolvedAnswers={activePendingResolvedAnswers}
+                          activePendingIsResponding={activePendingIsResponding}
+                          activePendingDraftAnswers={activePendingDraftAnswers}
+                          activePendingQuestionIndex={activePendingQuestionIndex}
+                          respondingRequestIds={respondingRequestIds}
+                          showPlanFollowUpPrompt={showPlanFollowUpPrompt}
+                          activeProposedPlan={activeProposedPlan}
+                          activePlan={activePlan as { turnId?: TurnId } | null}
+                          sidebarProposedPlan={sidebarProposedPlan as { turnId?: TurnId } | null}
+                          planSidebarLabel={planSidebarLabel}
+                          planSidebarOpen={planSidebarOpen}
+                          runtimeMode={runtimeMode}
+                          interactionMode={interactionMode}
+                          lockedProvider={lockedProvider}
+                          providerStatuses={providerStatuses as ServerProvider[]}
+                          activeProjectDefaultModelSelection={activeProject?.defaultModelSelection}
+                          activeThreadModelSelection={activeThread?.modelSelection}
+                          activeThreadActivities={activeThread?.activities}
+                          resolvedTheme={resolvedTheme}
+                          settings={settings}
+                          keybindings={keybindings}
+                          terminalOpen={Boolean(terminalUiState.terminalOpen)}
+                          gitCwd={gitCwd}
+                          promptRef={promptRef}
+                          composerImagesRef={composerImagesRef}
+                          composerTerminalContextsRef={composerTerminalContextsRef}
+                          composerElementContextsRef={composerElementContextsRef}
+                          onSend={onSend}
+                          onInterrupt={onInterrupt}
+                          onImplementPlanInNewThread={onImplementPlanInNewThread}
+                          onRespondToApproval={onRespondToApproval}
+                          onSelectActivePendingUserInputOption={
+                            onSelectActivePendingUserInputOption
+                          }
+                          onAdvanceActivePendingUserInput={onAdvanceActivePendingUserInput}
+                          onPreviousActivePendingUserInputQuestion={
+                            onPreviousActivePendingUserInputQuestion
+                          }
+                          onChangeActivePendingUserInputCustomAnswer={
+                            onChangeActivePendingUserInputCustomAnswer
+                          }
+                          onProviderModelSelect={onProviderModelSelect}
+                          getModelDisabledReason={getModelDisabledReason}
+                          toggleInteractionMode={toggleInteractionMode}
+                          handleRuntimeModeChange={handleRuntimeModeChange}
+                          handleInteractionModeChange={handleInteractionModeChange}
+                          togglePlanSidebar={togglePlanSidebar}
+                          focusComposer={focusComposer}
+                          scheduleComposerFocus={scheduleComposerFocus}
+                          setThreadError={setThreadError}
+                          onExpandImage={onExpandTimelineImage}
+                        />
+                      </div>
+                      <div className="min-h-0">
+                        <div
+                          data-terminal-open={terminalUiState.terminalOpen ? "true" : undefined}
+                          className="relative z-0"
+                        >
+                          {isGitRepo && (
+                            <div className="pointer-events-auto">
+                              <BranchToolbar
+                                environmentId={activeThread.environmentId}
+                                threadId={activeThread.id}
+                                {...(routeKind === "draft" && draftId ? { draftId } : {})}
+                                onEnvModeChange={onEnvModeChange}
+                                startFromOrigin={startFromOrigin}
+                                onStartFromOriginChange={onStartFromOriginChange}
+                                {...(canOverrideServerThreadEnvMode
+                                  ? { effectiveEnvModeOverride: envMode }
+                                  : {})}
+                                {...(canOverrideServerThreadEnvMode
+                                  ? {
+                                      activeThreadBranchOverride: activeThreadBranch,
+                                      onActiveThreadBranchOverrideChange:
+                                        setPendingServerThreadBranch,
+                                    }
+                                  : {})}
+                                envLocked={envLocked}
+                                onComposerFocusRequest={scheduleComposerFocus}
+                                {...(canCheckoutPullRequestIntoThread
+                                  ? { onCheckoutPullRequestRequest: openPullRequestDialog }
+                                  : {})}
+                                {...(hasMultipleEnvironments ? { onEnvironmentChange } : {})}
+                                availableEnvironments={logicalProjectEnvironments}
+                              />
+                            </div>
+                          )}
+                        </div>
                       </div>
                     </div>
+                    <div
+                      aria-hidden
+                      className="h-[calc(env(safe-area-inset-bottom)+1rem)] sm:h-[calc(env(safe-area-inset-bottom)+1.25rem)]"
+                    />
                   </div>
                 </div>
               </div>
diff --git a/apps/web/src/components/ProjectScriptsControl.tsx b/apps/web/src/components/ProjectScriptsControl.tsx
index ee8d607ee0b2c8ffe88932ff63e8185bfb3b897b..9d6e33ba9e2d721d20a082075294de3d04f832a3 100644
--- a/apps/web/src/components/ProjectScriptsControl.tsx
+++ b/apps/web/src/components/ProjectScriptsControl.tsx
@@ -276,7 +276,7 @@ export default function ProjectScriptsControl({
             >
               <ChevronDownIcon className="size-4" />
             </MenuTrigger>
-            <MenuPopup align="end" className="command-menu-surface">
+            <MenuPopup align="end">
               {scripts.map((script) => {
                 const shortcutLabel = shortcutLabelForCommand(
                   keybindings,
@@ -364,10 +364,7 @@ export default function ProjectScriptsControl({
         }}
         open={dialogOpen}
       >
-        <DialogPopup
-          backdropClassName="bg-black/40 backdrop-blur-none"
-          className="command-palette-dialog-surface workflow-dialog-surface before:hidden"
-        >
+        <DialogPopup className="before:hidden">
           <DialogHeader>
             <DialogTitle>{isEditing ? "Edit Action" : "Add Action"}</DialogTitle>
             <DialogDescription>
@@ -392,7 +389,7 @@ export default function ProjectScriptsControl({
                     >
                       <ScriptIcon icon={icon} className="size-4.5" />
                     </PopoverTrigger>
-                    <PopoverPopup align="start" className="command-menu-surface">
+                    <PopoverPopup align="start">
                       <div className="grid grid-cols-3 gap-2">
                         {SCRIPT_ICONS.map((entry) => {
                           const isSelected = entry.id === icon;
diff --git a/apps/web/src/components/chat/ChatComposer.tsx b/apps/web/src/components/chat/ChatComposer.tsx
index 264575a1ddaa5f7b69198dee5b1a8eededb2e61a..26b33992452d5dec685781b4b0ee00f1a1eca76f 100644
--- a/apps/web/src/components/chat/ChatComposer.tsx
+++ b/apps/web/src/components/chat/ChatComposer.tsx
@@ -2154,7 +2154,7 @@ export const ChatComposer = memo(function ChatComposer(props: ChatComposerProps)
           ref={composerSurfaceRef}
           data-chat-composer-mobile-collapsed={isComposerCollapsedMobile ? "true" : "false"}
           className={cn(
-            "chat-composer-glass rounded-[20px] transition-[background-color] duration-200",
+            "rounded-[20px] transition-[background-color] duration-200",
             isDragOverComposer ? "bg-accent/45 ring-1 ring-primary/70" : null,
             projectSelectionRequired ? "opacity-75" : null,
             composerProviderState.composerSurfaceClassName,
diff --git a/apps/web/src/components/settings/AddProviderInstanceDialog.tsx b/apps/web/src/components/settings/AddProviderInstanceDialog.tsx
index ed808e30b0cea6ccf98b9b3cf7ced45cc5de6018..378ce2e3e3c69808fa03f02f852a9625dec426e6 100644
--- a/apps/web/src/components/settings/AddProviderInstanceDialog.tsx
+++ b/apps/web/src/components/settings/AddProviderInstanceDialog.tsx
@@ -222,8 +222,8 @@ export function AddProviderInstanceDialog({ open, onOpenChange }: AddProviderIns
   return (
     <Dialog open={open} onOpenChange={onOpenChange}>
       <DialogPopup className="max-w-xl overflow-hidden">
-        <div className="flex min-h-0 flex-col overflow-hidden border-foreground/10 bg-background shadow-2xl">
-          <DialogHeader className="border-b border-border/70 bg-background">
+        <div className="flex min-h-0 flex-col overflow-hidden">
+          <DialogHeader className="border-b border-border/70">
             <DialogTitle>Add provider instance</DialogTitle>
             <DialogDescription>
               Configure an additional provider instance — for example, a second Codex install
@@ -239,7 +239,7 @@ export function AddProviderInstanceDialog({ open, onOpenChange }: AddProviderIns
 
           <div
             data-slot="dialog-panel"
-            className="space-y-4 border-b border-border/70 bg-muted/20 px-6 py-5"
+            className="space-y-4 border-b border-border/70 bg-foreground/[0.025] px-6 py-5"
           >
             <AnimatedHeight>
               <div className={cn("grid gap-2", wizardStep !== 0 && "hidden")}>
@@ -409,7 +409,7 @@ export function AddProviderInstanceDialog({ open, onOpenChange }: AddProviderIns
             </AnimatedHeight>
           </div>
 
-          <DialogFooter className="border-t bg-background">
+          <DialogFooter className="border-t bg-transparent">
             <Button
               variant="outline"
               size="sm"
diff --git a/apps/web/src/components/settings/SettingsPanels.tsx b/apps/web/src/components/settings/SettingsPanels.tsx
index 5b29c5494cc78879e24238ce3622fc26540b3897..ff4edccec0d2272dd9b208b1215ea7b15eee1102 100644
--- a/apps/web/src/components/settings/SettingsPanels.tsx
+++ b/apps/web/src/components/settings/SettingsPanels.tsx
@@ -18,7 +18,11 @@ import {
   settlePromise,
   squashAtomCommandFailure,
 } from "@t3tools/client-runtime/state/runtime";
-import { DEFAULT_UNIFIED_SETTINGS } from "@t3tools/contracts/settings";
+import {
+  DEFAULT_UNIFIED_SETTINGS,
+  MAX_GLASS_OPACITY,
+  MIN_GLASS_OPACITY,
+} from "@t3tools/contracts/settings";
 import { createModelSelection } from "@t3tools/shared/model";
 import * as Arr from "effect/Array";
 import * as Duration from "effect/Duration";
@@ -389,6 +393,7 @@ export function useSettingsRestore(onRestored?: () => void) {
   const changedSettingLabels = useMemo(
     () => [
       ...(theme !== "system" ? ["Theme"] : []),
+      ...(settings.glassOpacity !== DEFAULT_UNIFIED_SETTINGS.glassOpacity ? ["Glass opacity"] : []),
       ...(settings.timestampFormat !== DEFAULT_UNIFIED_SETTINGS.timestampFormat
         ? ["Time format"]
         : []),
@@ -440,6 +445,7 @@ export function useSettingsRestore(onRestored?: () => void) {
       settings.defaultThreadEnvMode,
       settings.newWorktreesStartFromOrigin,
       settings.diffIgnoreWhitespace,
+      settings.glassOpacity,
       settings.automaticGitFetchInterval,
       settings.enableAssistantStreaming,
       settings.enableProviderUpdateChecks,
@@ -465,6 +471,7 @@ export function useSettingsRestore(onRestored?: () => void) {
       timestampFormat: DEFAULT_UNIFIED_SETTINGS.timestampFormat,
       wordWrap: DEFAULT_UNIFIED_SETTINGS.wordWrap,
       diffIgnoreWhitespace: DEFAULT_UNIFIED_SETTINGS.diffIgnoreWhitespace,
+      glassOpacity: DEFAULT_UNIFIED_SETTINGS.glassOpacity,
       sidebarThreadPreviewCount: DEFAULT_UNIFIED_SETTINGS.sidebarThreadPreviewCount,
       autoOpenPlanSidebar: DEFAULT_UNIFIED_SETTINGS.autoOpenPlanSidebar,
       enableAssistantStreaming: DEFAULT_UNIFIED_SETTINGS.enableAssistantStreaming,
@@ -559,6 +566,51 @@ export function GeneralSettingsPanel() {
           }
         />
 
+        <SettingsRow
+          title="Glass opacity"
+          description="Control how transparent glass surfaces are. Higher values make menus, dialogs, and the composer more solid."
+          resetAction={
+            settings.glassOpacity !== DEFAULT_UNIFIED_SETTINGS.glassOpacity ? (
+              <SettingResetButton
+                label="glass opacity"
+                onClick={() =>
+                  updateSettings({ glassOpacity: DEFAULT_UNIFIED_SETTINGS.glassOpacity })
+                }
+              />
+            ) : null
+          }
+          control={
+            <div className="flex w-full items-center gap-3 sm:w-52">
+              <input
+                aria-label="Glass opacity"
+                className="glass-opacity-slider min-w-0 flex-1"
+                id="glass-opacity"
+                max={MAX_GLASS_OPACITY}
+                min={MIN_GLASS_OPACITY}
+                onChange={(event) => {
+                  const glassOpacity = Number(event.currentTarget.value);
+                  if (
+                    Number.isInteger(glassOpacity) &&
+                    glassOpacity >= MIN_GLASS_OPACITY &&
+                    glassOpacity <= MAX_GLASS_OPACITY
+                  ) {
+                    updateSettings({ glassOpacity });
+                  }
+                }}
+                step={5}
+                type="range"
+                value={settings.glassOpacity}
+              />
+              <output
+                className="w-10 text-right font-mono text-xs tabular-nums text-muted-foreground"
+                htmlFor="glass-opacity"
+              >
+                {settings.glassOpacity}%
+              </output>
+            </div>
+          }
+        />
+
         <SettingsRow
           title="Time format"
           description="System default follows your browser or OS clock preference."
diff --git a/apps/web/src/components/ui/alert-dialog.tsx b/apps/web/src/components/ui/alert-dialog.tsx
index c92f1b8082da998b98d16bed3fea676107a6e769..0d1994f8240fcfff331b921f517edbdba8ec47eb 100644
--- a/apps/web/src/components/ui/alert-dialog.tsx
+++ b/apps/web/src/components/ui/alert-dialog.tsx
@@ -19,7 +19,7 @@ function AlertDialogBackdrop({ className, ...props }: AlertDialogPrimitive.Backd
     <AlertDialogPrimitive.Backdrop
       forceRender
       className={cn(
-        "fixed inset-0 z-50 bg-background/60 backdrop-blur-xs transition-all duration-200 data-ending-style:opacity-0 data-starting-style:opacity-0",
+        "fixed inset-0 z-50 bg-black/20 backdrop-blur-[2px] transition-all duration-200 data-ending-style:opacity-0 data-starting-style:opacity-0 dark:bg-black/55",
         className,
       )}
       data-slot="alert-dialog-backdrop"
@@ -56,7 +56,7 @@ function AlertDialogPopup({
       >
         <AlertDialogPrimitive.Popup
           className={cn(
-            "-translate-y-[calc(1.25rem*var(--nested-dialogs))] relative row-start-2 flex max-h-full min-h-0 w-full min-w-0 max-w-lg scale-[calc(1-0.1*var(--nested-dialogs))] flex-col rounded-2xl border bg-popover not-dark:bg-clip-padding text-popover-foreground opacity-[calc(1-0.1*var(--nested-dialogs))] shadow-lg/5 transition-[scale,opacity,translate] duration-200 ease-in-out will-change-transform before:pointer-events-none before:absolute before:inset-0 before:rounded-[calc(var(--radius-2xl)-1px)] before:shadow-[0_1px_--theme(--color-black/4%)] data-nested:data-ending-style:translate-y-8 data-nested:data-starting-style:translate-y-8 data-nested-dialog-open:origin-top data-ending-style:scale-98 data-starting-style:scale-98 data-ending-style:opacity-0 data-starting-style:opacity-0 dark:before:shadow-[0_-1px_--theme(--color-white/6%)]",
+            "dialog-glass -translate-y-[calc(1.25rem*var(--nested-dialogs))] relative row-start-2 flex max-h-full min-h-0 w-full min-w-0 max-w-lg scale-[calc(1-0.1*var(--nested-dialogs))] flex-col rounded-2xl border border-border/70 text-popover-foreground opacity-[calc(1-0.1*var(--nested-dialogs))] transition-[scale,opacity,translate] duration-200 ease-in-out will-change-transform before:pointer-events-none before:absolute before:inset-0 before:rounded-[calc(var(--radius-2xl)-1px)] before:shadow-[0_1px_--theme(--color-black/4%)] data-nested:data-ending-style:translate-y-8 data-nested:data-starting-style:translate-y-8 data-nested-dialog-open:origin-top data-ending-style:scale-98 data-starting-style:scale-98 data-ending-style:opacity-0 data-starting-style:opacity-0 dark:before:shadow-[0_-1px_--theme(--color-white/6%)]",
             bottomStickOnMobile &&
               "max-sm:max-w-none max-sm:rounded-none max-sm:border-x-0 max-sm:border-t max-sm:border-b-0 max-sm:opacity-[calc(1-min(var(--nested-dialogs),1))] max-sm:data-ending-style:translate-y-4 max-sm:data-starting-style:translate-y-4 max-sm:before:hidden max-sm:before:rounded-none",
             className,
diff --git a/apps/web/src/components/ui/command.tsx b/apps/web/src/components/ui/command.tsx
index 90aa7328cac25913eec0d210aa7ec20e0b546d87..f22eac4a86073388d8fe6fa541c3f58a5c005408 100644
--- a/apps/web/src/components/ui/command.tsx
+++ b/apps/web/src/components/ui/command.tsx
@@ -30,7 +30,7 @@ function CommandDialogBackdrop({ className, ...props }: CommandDialogPrimitive.B
   return (
     <CommandDialogPrimitive.Backdrop
       className={cn(
-        "fixed inset-0 z-50 bg-black/40 transition-opacity duration-200 data-ending-style:opacity-0 data-starting-style:opacity-0",
+        "fixed inset-0 z-50 bg-black/20 backdrop-blur-[2px] transition-opacity duration-200 data-ending-style:opacity-0 data-starting-style:opacity-0 dark:bg-black/55",
         className,
       )}
       data-slot="command-dialog-backdrop"
diff --git a/apps/web/src/components/ui/dialog.tsx b/apps/web/src/components/ui/dialog.tsx
index 90a6049763da0a577d9a86dc582e5bbab778ef3e..3e15fb20e637701333b645eaef89b1f8877afdda 100644
--- a/apps/web/src/components/ui/dialog.tsx
+++ b/apps/web/src/components/ui/dialog.tsx
@@ -25,7 +25,7 @@ function DialogBackdrop({ className, ...props }: DialogPrimitive.Backdrop.Props)
     <DialogPrimitive.Backdrop
       forceRender
       className={cn(
-        "fixed inset-0 z-50 bg-background/60 backdrop-blur-xs transition-all duration-200 data-ending-style:opacity-0 data-starting-style:opacity-0",
+        "fixed inset-0 z-50 bg-black/20 backdrop-blur-[2px] transition-all duration-200 data-ending-style:opacity-0 data-starting-style:opacity-0 dark:bg-black/55",
         className,
       )}
       data-slot="dialog-backdrop"
@@ -67,7 +67,7 @@ function DialogPopup({
       >
         <DialogPrimitive.Popup
           className={cn(
-            "-translate-y-[calc(1.25rem*var(--nested-dialogs))] relative row-start-2 flex max-h-full min-h-0 w-full min-w-0 max-w-lg scale-[calc(1-0.1*var(--nested-dialogs))] flex-col rounded-2xl border bg-popover not-dark:bg-clip-padding text-popover-foreground opacity-[calc(1-0.1*var(--nested-dialogs))] shadow-lg/5 transition-[scale,opacity,translate] duration-200 ease-in-out will-change-transform before:pointer-events-none before:absolute before:inset-0 before:rounded-[calc(var(--radius-2xl)-1px)] before:shadow-[0_1px_--theme(--color-black/4%)] data-nested:data-ending-style:translate-y-8 data-nested:data-starting-style:translate-y-8 data-nested-dialog-open:origin-top data-ending-style:scale-98 data-starting-style:scale-98 data-ending-style:opacity-0 data-starting-style:opacity-0 dark:before:shadow-[0_-1px_--theme(--color-white/6%)]",
+            "dialog-glass -translate-y-[calc(1.25rem*var(--nested-dialogs))] relative row-start-2 flex max-h-full min-h-0 w-full min-w-0 max-w-lg scale-[calc(1-0.1*var(--nested-dialogs))] flex-col rounded-2xl border border-border/70 text-popover-foreground opacity-[calc(1-0.1*var(--nested-dialogs))] transition-[scale,opacity,translate] duration-200 ease-in-out will-change-transform before:pointer-events-none before:absolute before:inset-0 before:rounded-[calc(var(--radius-2xl)-1px)] before:shadow-[0_1px_--theme(--color-black/4%)] data-nested:data-ending-style:translate-y-8 data-nested:data-starting-style:translate-y-8 data-nested-dialog-open:origin-top data-ending-style:scale-98 data-starting-style:scale-98 data-ending-style:opacity-0 data-starting-style:opacity-0 dark:before:shadow-[0_-1px_--theme(--color-white/6%)]",
             bottomStickOnMobile &&
               "max-sm:max-w-none max-sm:rounded-none max-sm:border-x-0 max-sm:border-t max-sm:border-b-0 max-sm:opacity-[calc(1-min(var(--nested-dialogs),1))] max-sm:data-ending-style:translate-y-4 max-sm:data-starting-style:translate-y-4 max-sm:before:hidden max-sm:before:rounded-none",
             className,
diff --git a/apps/web/src/components/ui/menu.tsx b/apps/web/src/components/ui/menu.tsx
index 655663513937ab9d2331a0bf3eadd5fa25a8a79b..c2b130e51ac9af23e6db664830fb60fc47260cd2 100644
--- a/apps/web/src/components/ui/menu.tsx
+++ b/apps/web/src/components/ui/menu.tsx
@@ -42,7 +42,7 @@ function MenuPopup({
         align={align}
         alignOffset={alignOffset}
         anchor={anchor}
-        className="z-50"
+        className="z-[60]"
         data-slot="menu-positioner"
         side={side}
         sideOffset={sideOffset}
diff --git a/apps/web/src/components/ui/popover.tsx b/apps/web/src/components/ui/popover.tsx
index de0e2e55df1a5d43f8f2570a88a9ff3b193beed5..04a640f5baf980121703734d42ab9f0d43bf061d 100644
--- a/apps/web/src/components/ui/popover.tsx
+++ b/apps/web/src/components/ui/popover.tsx
@@ -42,14 +42,14 @@ function PopoverPopup({
         align={align}
         alignOffset={alignOffset}
         anchor={anchor}
-        className="z-50 h-(--positioner-height) w-(--positioner-width) max-w-(--available-width) transition-[top,left,right,bottom,transform] data-instant:transition-none"
+        className="z-[60] h-(--positioner-height) w-(--positioner-width) max-w-(--available-width) transition-transform data-instant:transition-none"
         data-slot="popover-positioner"
         side={side}
         sideOffset={sideOffset}
       >
         <PopoverPrimitive.Popup
           className={cn(
-            "relative flex h-(--popup-height,auto) w-(--popup-width,auto) origin-(--transform-origin) rounded-lg border bg-popover not-dark:bg-clip-padding text-popover-foreground shadow-lg/5 outline-none transition-[width,height,scale,opacity] before:pointer-events-none before:absolute before:inset-0 before:rounded-[calc(var(--radius-lg)-1px)] before:shadow-[0_1px_--theme(--color-black/4%)] has-data-[slot=calendar]:rounded-xl has-data-[slot=calendar]:before:rounded-[calc(var(--radius-xl)-1px)] data-starting-style:scale-98 data-starting-style:opacity-0 dark:before:shadow-[0_-1px_--theme(--color-white/6%)]",
+            "dropdown-glass relative flex h-(--popup-height,auto) w-(--popup-width,auto) origin-(--transform-origin) rounded-lg text-popover-foreground outline-none transition-[width,height,scale,opacity] before:pointer-events-none before:absolute before:inset-0 before:rounded-[calc(var(--radius-lg)-1px)] before:shadow-[0_1px_--theme(--color-black/4%)] has-data-[slot=calendar]:rounded-xl has-data-[slot=calendar]:before:rounded-[calc(var(--radius-xl)-1px)] data-starting-style:scale-98 data-starting-style:opacity-0 dark:before:shadow-[0_-1px_--theme(--color-white/6%)]",
             tooltipStyle &&
               "w-fit text-balance rounded-md text-xs shadow-md/5 before:rounded-[calc(var(--radius-md)-1px)]",
             className,
diff --git a/apps/web/src/index.css b/apps/web/src/index.css
index 64f225232929db3a662b3178c03b6a6c25593d22..5836d441a15d6a2e677e93c683791da8127c9c53 100644
--- a/apps/web/src/index.css
+++ b/apps/web/src/index.css
@@ -77,6 +77,7 @@ html[data-mobile-composer-route-transition="true"]::view-transition-old(t3-mobil
 
 :root {
   --app-scrollbar-width: 6px;
+  --glass-opacity: 80%;
   --desktop-window-right-resize-inset: 0px;
   --workspace-topbar-height: 52px;
   --workspace-controls-top: 0px;
@@ -362,32 +363,29 @@ html[data-mobile-composer-route-transition="true"]::view-transition-old(t3-mobil
   }
 
   .chat-composer-glass {
-    background: var(--secondary);
+    background: color-mix(in srgb, var(--background) var(--glass-opacity), transparent);
     -webkit-backdrop-filter: blur(16px);
     backdrop-filter: blur(16px);
   }
 
-  .chat-composer-context-strip {
-    position: relative;
-    isolation: isolate;
-  }
-
-  .chat-composer-context-strip::before {
-    position: absolute;
-    z-index: -1;
-    inset: 0;
-    border-radius: 0 0 16px 16px;
-    background: color-mix(in srgb, var(--card) 20%, transparent);
+  .chat-composer-glass-host {
+    background: color-mix(in srgb, var(--background) var(--glass-opacity), transparent);
     box-shadow: 0 12px 28px -18px rgb(0 0 0 / 40%);
-    content: "";
+    -webkit-backdrop-filter: blur(16px);
+    backdrop-filter: blur(16px);
+  }
+
+  .dropdown-glass,
+  .dialog-glass,
+  .workflow-dialog-surface,
+  .command-palette-dialog-surface {
+    background: color-mix(in srgb, var(--background) var(--glass-opacity), transparent);
     -webkit-backdrop-filter: blur(16px);
     backdrop-filter: blur(16px);
   }
 
   .dropdown-glass {
-    background: var(--secondary);
-    -webkit-backdrop-filter: blur(16px);
-    backdrop-filter: blur(16px);
+    border: 1px solid color-mix(in srgb, var(--foreground) 10%, transparent);
     box-shadow: 0 16px 40px -18px rgb(0 0 0 / 55%);
   }
 
@@ -396,30 +394,25 @@ html[data-mobile-composer-route-transition="true"]::view-transition-old(t3-mobil
   }
 
   .command-menu-surface {
-    background: var(--popover);
-    -webkit-backdrop-filter: none;
-    backdrop-filter: none;
+    background: color-mix(in srgb, var(--background) var(--glass-opacity), transparent);
+    -webkit-backdrop-filter: blur(16px);
+    backdrop-filter: blur(16px);
     box-shadow: 0 24px 64px -24px rgb(0 0 0 / 65%);
   }
 
   .workflow-dialog-surface {
-    border-color: transparent;
-    background: var(--secondary);
-    -webkit-backdrop-filter: blur(16px);
-    backdrop-filter: blur(16px);
+    border-color: color-mix(in srgb, var(--foreground) 10%, transparent);
     box-shadow: 0 24px 64px -24px rgb(0 0 0 / 65%);
   }
 
   .command-palette-dialog-surface {
-    border-color: transparent !important;
-    background: var(--secondary) !important;
-    -webkit-backdrop-filter: blur(16px);
-    backdrop-filter: blur(16px);
+    border-color: color-mix(in srgb, var(--foreground) 10%, transparent) !important;
+    background: color-mix(in srgb, var(--background) var(--glass-opacity), transparent) !important;
     box-shadow: 0 24px 64px -24px rgb(0 0 0 / 65%) !important;
   }
 
-  .dark .dropdown-glass {
-    background: color-mix(in srgb, var(--secondary) 80%, var(--background));
+  .dark .dropdown-glass,
+  .dark .dialog-glass {
     box-shadow: 0 18px 44px -18px rgb(0 0 0 / 80%);
   }
 
@@ -433,12 +426,6 @@ html[data-mobile-composer-route-transition="true"]::view-transition-old(t3-mobil
     box-shadow: none;
   }
 
-  .dark .workflow-dialog-surface {
-    background: var(--secondary);
-    -webkit-backdrop-filter: blur(16px);
-    backdrop-filter: blur(16px);
-  }
-
   .dark .command-palette-dialog-surface {
     box-shadow: none !important;
   }
@@ -462,15 +449,15 @@ html[data-mobile-composer-route-transition="true"]::view-transition-old(t3-mobil
     box-shadow: none !important;
   }
 
-  .dark .chat-composer-context-strip::before {
-    background: color-mix(in srgb, var(--card) 45%, transparent);
-    box-shadow: 0 14px 32px -18px rgb(0 0 0 / 75%);
+  .glass-opacity-slider {
+    accent-color: var(--primary);
+    cursor: pointer;
   }
 
-  .chat-composer-lower-chrome {
-    margin-top: -1px;
-    margin-inline-end: var(--app-scrollbar-width);
-    padding-top: 1px;
+  .glass-opacity-slider:focus-visible {
+    border-radius: 9999px;
+    outline: 2px solid var(--ring);
+    outline-offset: 3px;
   }
 
   @media (min-width: 40rem) {
@@ -485,18 +472,15 @@ html[data-mobile-composer-route-transition="true"]::view-transition-old(t3-mobil
   }
 
   @supports not ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
-    .chat-composer-glass {
-      background: var(--secondary);
-    }
-
-    .chat-composer-context-strip::before {
-      background: var(--card);
-    }
-
-    .dropdown-glass {
-      background: color-mix(in srgb, var(--popover) 88%, black);
+    .chat-composer-glass,
+    .chat-composer-glass-host {
+      background: var(--background);
     }
 
+    .dialog-glass,
+    .dropdown-glass,
+    .command-menu-surface,
+    .command-palette-dialog-surface,
     .workflow-dialog-surface {
       background: var(--popover);
     }
diff --git a/apps/web/src/routes/__root.tsx b/apps/web/src/routes/__root.tsx
index ff6bc5b39524888979dbbcdfcffa0ec37c9f859a..346991d114de1596ae301cdade454f919aee7af3 100644
--- a/apps/web/src/routes/__root.tsx
+++ b/apps/web/src/routes/__root.tsx
@@ -127,6 +127,7 @@ function RootRouteView() {
     <ToastProvider>
       <AnchoredToastProvider>
         <DocumentTitleSync />
+        <GlassAppearanceSync />
         {primaryEnvironmentAuthenticated ? <AuthenticatedTracingBootstrap /> : null}
         <RelayClientInstallDialog />
         <ConnectOnboardingDialog />
@@ -141,6 +142,16 @@ function RootRouteView() {
   );
 }
 
+function GlassAppearanceSync() {
+  const glassOpacity = useClientSettings((settings) => settings.glassOpacity);
+
+  useEffect(() => {
+    document.documentElement.style.setProperty("--glass-opacity", `${glassOpacity}%`);
+  }, [glassOpacity]);
+
+  return null;
+}
+
 function DocumentTitleSync() {
   const primaryServerVersion =
     useAtomValue(primaryServerConfigAtom)?.environment.serverVersion ?? null;
diff --git a/packages/contracts/src/settings.test.ts b/packages/contracts/src/settings.test.ts
index 001daf1b239035b9fc29f6e20d932f73a35ec187..023a5724ea39c2d5fb14f11c9f696c29b9eedf95 100644
--- a/packages/contracts/src/settings.test.ts
+++ b/packages/contracts/src/settings.test.ts
@@ -33,6 +33,22 @@ describe("ClientSettings word wrap", () => {
   });
 });
 
+describe("ClientSettings glass opacity", () => {
+  it("defaults to a readable translucent surface", () => {
+    expect(decodeClientSettings({}).glassOpacity).toBe(80);
+  });
+
+  it.each([49, 101, 72.5])("rejects an invalid glass opacity: %s", (value) => {
+    expect(() => decodeClientSettings({ glassOpacity: value })).toThrow();
+    expect(() => decodeClientSettingsPatch({ glassOpacity: value })).toThrow();
+  });
+
+  it.each([50, 75, 100])("accepts a glass opacity within the supported range: %s", (value) => {
+    expect(decodeClientSettings({ glassOpacity: value }).glassOpacity).toBe(value);
+    expect(decodeClientSettingsPatch({ glassOpacity: value }).glassOpacity).toBe(value);
+  });
+});
+
 describe("ClientSettings sidebar v2", () => {
   it("defaults the beta off with a three-day auto-settle threshold", () => {
     const settings = decodeClientSettings({});
diff --git a/packages/contracts/src/settings.ts b/packages/contracts/src/settings.ts
index 2f3c1aafe69c8f55d8ca28bed70fd4fae1c7366b..57ab44a6b66cf0d2bd1379fa3f52754044ed65e1 100644
--- a/packages/contracts/src/settings.ts
+++ b/packages/contracts/src/settings.ts
@@ -48,6 +48,16 @@ export const SidebarAutoSettleAfterDays = Schema.Number.check(
 );
 export type SidebarAutoSettleAfterDays = typeof SidebarAutoSettleAfterDays.Type;
 export const DEFAULT_SIDEBAR_AUTO_SETTLE_AFTER_DAYS: SidebarAutoSettleAfterDays = 3;
+export const MIN_GLASS_OPACITY = 50;
+export const MAX_GLASS_OPACITY = 100;
+export const GlassOpacity = Schema.Int.check(
+  Schema.isBetween({
+    minimum: MIN_GLASS_OPACITY,
+    maximum: MAX_GLASS_OPACITY,
+  }),
+);
+export type GlassOpacity = typeof GlassOpacity.Type;
+export const DEFAULT_GLASS_OPACITY: GlassOpacity = 80;
 
 export const ClientSettingsSchema = Schema.Struct({
   autoOpenPlanSidebar: Schema.Boolean.pipe(Schema.withDecodingDefault(Effect.succeed(false))),
@@ -57,6 +67,9 @@ export const ClientSettingsSchema = Schema.Struct({
     Schema.withDecodingDefault(Effect.succeed([])),
   ),
   diffIgnoreWhitespace: Schema.Boolean.pipe(Schema.withDecodingDefault(Effect.succeed(true))),
+  glassOpacity: GlassOpacity.pipe(
+    Schema.withDecodingDefault(Effect.succeed(DEFAULT_GLASS_OPACITY)),
+  ),
   // Model favorites. Historically keyed by provider kind, now
   // widened to `ProviderInstanceId` so users can favorite a specific model
   // on a custom provider instance (e.g. "Codex Personal · gpt-5") without
@@ -560,6 +573,7 @@ export const ClientSettingsPatch = Schema.Struct({
   confirmThreadArchive: Schema.optionalKey(Schema.Boolean),
   confirmThreadDelete: Schema.optionalKey(Schema.Boolean),
   diffIgnoreWhitespace: Schema.optionalKey(Schema.Boolean),
+  glassOpacity: Schema.optionalKey(GlassOpacity),
   favorites: Schema.optionalKey(
     Schema.Array(
       Schema.Struct({