diff --git a/DESIGN.md b/DESIGN.md
new file mode 100644
index 0000000..5b76d51
--- /dev/null
+++ b/DESIGN.md
@@ -0,0 +1,50 @@
+# Puter interface rules
+
+Puter is a compact macOS system utility. Its visual hierarchy is the page title,
+live data, and the selected item's details. Keep the user's attention on those.
+
+## Direction
+
+The chosen direction pairs a Liquid Glass navigation layer with a compact,
+readable data workspace. The earlier flat utility treatment was too bland;
+a full glass dashboard would distract from the dense process table. Glass belongs
+to navigation and actions, while resource color and larger values give data hierarchy.
+
+- Use the system font, semantic text styles, and tabular digits for telemetry.
+- Use the system accent for selection and actions. Resource/chart colors convey
+  resource identity; status colors also require a text or symbol label.
+- Keep data surfaces opaque and readable. Native toolbar controls receive the
+  platform's material treatment; the inset sidebar uses regular Liquid Glass.
+  Related page actions use glass buttons inside a GlassEffectContainer.
+  Never layer glass on table rows or resource readings.
+- Honor Reduce Transparency with an opaque sidebar. Older systems use regular
+  material and bordered controls. Resource meters show actual percentages,
+  not decorative or simulated activity.
+- Retain macOS 14 support. Newer APIs require macOS availability guards.
+- Shared geometry lives in `PuterLayout`: 20-point page inset, 16-point section
+  spacing, 8-point control spacing. Native control metrics take precedence.
+
+## Shell and interaction
+
+- One native toolbar sits above the content. The sidebar is inset eight points
+  below it, with one 16-point rounded navigation surface instead of a hard divider.
+- The window uses a unified hidden-title toolbar with native traffic lights and
+  outer corners. A regular-material surround connects the toolbar to the inset,
+  opaque workspace. Launch, refresh, and update actions share a glass container.
+  Do not replace native window chrome with a custom draggable header.
+- Compact and expanded navigation use the same List, row heights, and ordering.
+  Width changes are immediate; frequently updated process data is not animated.
+- Each page retains its search while switching pages. An explicit "Go to details"
+  clears that destination's filter so it cannot hide the requested process.
+- Window-local selection and search belong to ContentView. Shared telemetry
+  remains in the observable monitor; do not add a forwarding view-model layer.
+- Appearance is System, Light, or Dark. System is the default.
+- Resource summaries adapt to the available width; tables keep their user-sized
+  columns and horizontal scrolling. Search-empty and collecting states are explicit.
+
+## Verification
+
+Check both appearances, compact/expanded navigation, the inspector open/closed,
+search-empty states, keyboard navigation, context menus, and sidebar toggles.
+Check resizing and motion in the running app. A screenshot verifies the captured
+layout, not frame rate. Do not claim animation performance without measuring it.
diff --git a/POWER-REPORTING.md b/POWER-REPORTING.md
new file mode 100644
index 0000000..32dac6a
--- /dev/null
+++ b/POWER-REPORTING.md
@@ -0,0 +1,53 @@
+# Power reporting
+
+Battery telemetry now uses IORegistryEntryCreateCFProperties on AppleSmartBattery,
+not regular expressions over human-readable `ioreg` output. On this macOS build,
+the tree-prefix indentation caused the old reader to miss BatteryInstalled and
+every top-level battery/adapter field.
+
+Readings have separate meanings:
+
+- System load: PowerTelemetryData.SystemLoad in milliwatts, converted to watts.
+- Charger → Mac: SystemPowerIn, only while ExternalConnected. This includes
+  charging; it is not wall-socket consumption or the charger's rated maximum.
+- Battery: voltage × signed current. Positive current charges, negative current
+  discharges. Two's-complement unsigned current is decoded as signed Int64.
+- Reported capability: AdapterDetails.Watts. The charger's model name may say
+  140 W while the current connection reports only 94 W available.
+- Negotiated ceiling: AdapterVoltage × Current, not measured current draw.
+
+Unknown readings are not rendered as zero. Zero battery current remains a valid
+idle reading. Disconnected adapters are dropped even if stale registry details
+remain. Capacity falls back to nested BatteryData on newer registry layouts.
+Missing capacity/temperature no longer implies a dead battery or 0 °C.
+Available SMC power readings remain a fallback; fresh registry data takes priority.
+
+Registry keys are hardware/OS-dependent and are not a universal power-meter API.
+Values are point-in-time samples; their sum may differ because of sampling times,
+conversion losses and sensor coverage. No wall-power or cable e-marker claims.
+
+The dropdown is a native NSPopover anchored to an NSStatusItem. Left-click toggles
+the panel, right-click presents native metric/update-speed submenus. Command-Shift-M
+opens the same panel from the Options menu. Power rows have contextual copy actions
+and explanatory help. The native popover owns its outer material and rounding;
+actions use Liquid Glass on macOS 26+. Reduce Transparency uses an opaque content
+background. There is no second glass rectangle with competing corner radii.
+
+Popover show/close events join the existing demand scheduler. Opening it requests
+power/system samples at five-second cadence, without full process inventory,
+port enumeration, fan scanning or slow hardware diagnostics. Closing it drops
+that demand. Menu-bar readings remain observed even with the main window closed.
+
+Tests cover charging, discharging, two's-complement current, zero vs unknown,
+invalid values, nested capacities and dropdown-only sampling demand.
+
+Validation on 22 September 2026: 38 tests passed and Release built successfully.
+Computer use verified the panel's live battery/charger values, removed duplicate
+corner arcs, and opened the native reading submenu with Battery power and Charger
+input choices. The submenu originally dismissed its parent; native menu-tracking
+notifications now suspend transient popover dismissal while menus are active.
+Actual right-click status-button behavior and all appearance/accessibility modes
+still need broader manual coverage; automated tests do not establish those.
+
+Native API reference:
+https://developer.apple.com/documentation/iokit/1514310-ioregistryentrycreatecfpropertie
diff --git a/PROFILING.md b/PROFILING.md
new file mode 100644
index 0000000..57d0a76
--- /dev/null
+++ b/PROFILING.md
@@ -0,0 +1,132 @@
+# Release profiling — 22 September 2026
+
+## Setup
+
+Apple M4 Pro, 48 GiB RAM, macOS 27.0 (26A428), Xcode 27.
+Optimized SwiftPM Release build of the current uncommitted working tree.
+Isolated ad-hoc signed app: `/private/tmp/puter-profile-release.app`.
+Processes page, default Normal cadence, grouped categories, about 650–690 processes.
+Installed application was not replaced. No application source was changed during profiling.
+
+## Measurements
+
+Each counter measurement lasted 20 seconds, without Instruments attached.
+CPU is a percentage of **one core**, unlike puter's machine-normalized CPU column.
+Counters came from `proc_pid_rusage` v4, converting CPU Mach ticks with
+`mach_timebase_info`; memory is physical footprint, not resident size.
+
+| State | CPU (one core) | Interrupt wake-ups / 20 s | Physical footprint, start → end |
+| --- | ---: | ---: | ---: |
+| Processes visible, updating | 9.032% | 35 | 66.55 → 65.72 MiB |
+| After minimize action (activity not independently verified) | 8.992% | 52 | 71.64 → 66.84 MiB |
+| Hidden/inactive, menu-bar consumer enabled | 8.929% | 58 | 70.09 → 69.81 MiB |
+| Paused | 0.014% | 3 | 69.83 → 69.36 MiB |
+
+For the hidden measurement, NSRunningApplication reported `isActive=false` and
+`isHidden=true`; those flags were checked again after its separate trace.
+The 3-second `sample` capture reported 81.6 MiB footprint, 95.4 MiB lifetime peak.
+These short observations do not establish a memory leak or long-term plateau.
+
+## Trace-backed findings
+
+Two separate 15-second Time Profiler traces were captured. Percentages below are
+inclusive sampled CPU weights; nested paths overlap and must not be added.
+
+1. **Repeated process grouping dominates the UI work.** In the visible trace,
+   85.9% of sampled CPU weight belonged to the main thread; 42.0% passed through
+   `ProcessesView.grouped`, and 29.6% through `ProcessGrouping.appPath(for:)`.
+   `displayedGroups` invokes this computed property from category filtering,
+   table rendering and empty-state checks. Each computation enumerates running
+   applications, groups processes, parses app paths, and sorts the result.
+   Next fix: prepare one stable grouped/sorted snapshot per relevant input change,
+   cache executable-path → application identity, and reuse category partitions.
+
+2. **Background demand is not behaving as intended at runtime.** The hidden trace
+   still includes full `nativeProcessRecords` scans (5.1% inclusive), grouping
+   (38.6%) and SwiftUI graph transactions (58.0%). CPU did not materially fall when
+   hidden. Pure SamplingDemand unit tests therefore do not validate lifecycle
+   integration. The precise reason for the stale demand is not established.
+   Next fix: instrument scheduler demand transitions and connect them to actual
+   window visibility/occlusion and application activity; add integration tests.
+
+3. **Disk-capacity lookup remains in every telemetry capture.** `diskUsage()` is
+   unconditional even on the lightweight path. It accounts for 8.4% of visible
+   trace weight and 14.4% of hidden trace weight. It requests available capacity
+   for important usage, which is not a high-frequency activity counter.
+   Next fix: cache capacity and refresh it on a slower, disk-view-specific cadence.
+
+4. **Pause provides a genuinely quiet baseline.** It reduced measured CPU to
+   0.014% and produced no process-attributed disk I/O during the sample. This makes
+   always-on rendering alone unlikely to explain the updating-state cost.
+
+## Evidence
+
+- Visible trace: `/private/tmp/puter-foreground-release.trace`
+- Hidden trace: `/private/tmp/puter-background-release.trace`
+- Exported tables: `/private/tmp/puter-time-profile.xml`, `/private/tmp/puter-background-profile.xml`
+- Stack sample: `/private/tmp/puter-release-sample.txt`
+- Counter helper: `/private/tmp/puter-profile-counters.c`
+- Trace aggregation: `/private/tmp/analyze-puter-trace.py`
+
+Traces are local only and may contain process names, paths and environment metadata.
+They were not uploaded. Temporary artifacts may be removed by macOS.
+
+## Limits and next validation
+
+This was a short live-machine study, not a before/after comparison against the old
+poller. Other applications and an earlier preview were running; system memory
+utilization was high. No GPU energy, scroll hitch rate or frame-time claim is made.
+Instrumented samples are used for attribution, not as the low-overhead CPU metric.
+
+Fix lifecycle integration first, then repeated grouping and capacity lookup.
+Repeat these exact 20-second scenarios and add a SwiftUI scrolling trace before
+calling the performance work complete.
+
+## Fix pass — 22 September 2026
+
+Implemented window-visibility-driven demand with notification-driven rescheduling
+and live-state reconciliation before a scheduled sample. Visible unfocused windows
+remain live; hidden/minimized/occluded windows do not request process inventories.
+Recording and menu-bar consumers retain their separate demand policies.
+Initial load and explicit Refresh may request a single inventory.
+
+Moved process grouping to inventory application, added a bounded app-path cache
+(including negative results), and shared each table projection across category
+rendering and empty-state checks. Cached disk capacity separately from activity
+counters, refreshing on initial/manual requests, volume enumeration and every
+60 seconds on visible Performance.
+
+Release preview: `/private/tmp/puter-profile-fixed2.app`, PID 31379.
+32 tests passed, including new grouped-search, identity, totals and path-cache
+regressions. `git diff --check` passed. Installed app was not replaced.
+
+| Scenario, 20 seconds | Before, one-core CPU | After, one-core CPU |
+| --- | ---: | ---: |
+| Processes visible, updating | 9.032% | 3.541% |
+| Hidden, menu-bar consumer enabled | 8.929% | 0.914% |
+
+Visible wake-ups: 34; footprint 73.41 → 75.24 MiB. Hidden wake-ups: 19;
+footprint 141.45 → 118.56 MiB, after visiting Hardware. Hidden state was checked
+before and after the valid run (`active=false`, `hidden=true`). An earlier hidden
+attempt was discarded because the preview was externally changed to Hardware
+and unhidden mid-measurement. No memory-improvement claim is made.
+
+Visible 15-second trace: 963 ms sampled CPU versus the earlier 2114 ms.
+`ProcessesView.grouped` fell from 42.0% to 2.8% of sampled weight;
+`ProcessGrouping.groups` was 6.5%, and `appPath` about 0.1% (previously 29.6%).
+No `diskUsage` stack was sampled. Percentages are inclusive, overlapping weights.
+Trace: `/private/tmp/puter-fixed-visible.trace`; export:
+`/private/tmp/puter-fixed-visible.xml`.
+
+The separate hidden trace sampled 300 ms CPU in 15 seconds (previously 1444 ms).
+It contained no sampled process-inventory, process-group construction or disk
+capacity stacks. The remaining sampled work is mostly SwiftUI/AppKit updates;
+menu-bar system counters intentionally remain enabled. Hidden state was again
+verified after capture. Evidence: `/private/tmp/puter-fixed-hidden.trace` and
+`/private/tmp/puter-fixed-hidden.xml`.
+
+These are short live-machine observations, not a controlled benchmark. Process
+counts were around 700, system memory pressure differed from the first pass,
+and a test build ran during the visible counter sample. The savings are supported
+by the changed call stacks, but precise percentages will vary with workload.
+Scrolling/frame-time and long-term energy measurements remain separate work.
diff --git a/RELEASE_NOTES_1.2.0.md b/RELEASE_NOTES_1.2.0.md
new file mode 100644
index 0000000..e0157df
--- /dev/null
+++ b/RELEASE_NOTES_1.2.0.md
@@ -0,0 +1,16 @@
+# puter 1.2.0
+
+- Refreshed app shell, Liquid Glass controls, aligned toolbar actions and search.
+- New geometric loop-p Icon Composer icon and updated header branding.
+- Demand-aware sampling and process-group caching to reduce unnecessary monitoring work.
+- Improved battery power reporting, distinguishing measured power from charger capability.
+- Updated menu-bar monitor with resource summaries and power details.
+- Expanded battery, sampling-demand and process-group regression coverage.
+
+## Distribution
+
+Apple Silicon build for macOS 14 or later. Liquid Glass styling requires macOS 26 or later.
+
+The DMG and app ZIP are Developer ID signed and Apple notarized. Install manually from this release; Sparkle automatic updates are not configured in this build.
+
+Validation: 38 tests pass. Package validation, notarization and Gatekeeper checks are performed before publication. Live UI checks were performed on the development preview; a fresh packaged UI smoke test was blocked by repeated computer-use service crashes.
diff --git a/SAMPLING.md b/SAMPLING.md
new file mode 100644
index 0000000..7f75864
--- /dev/null
+++ b/SAMPLING.md
@@ -0,0 +1,42 @@
+# Sampling and events
+
+One cancellable scheduler follows `SamplingDemand`. No timer is scheduled while
+paused, or when the app has no visible window, menu-bar, alert, or recording consumer.
+Settings and startup pages do not request process inventory. Services are sampled
+only while their page is active. Background CPU/memory/network menu-bar readings
+use lightweight system counters, not process enumeration or per-app nettop.
+
+CPU time, I/O rates, fan speeds and service state still require samples: public
+macOS notifications are not a replacement for continuously changing counters.
+Recording deliberately retains system/process sampling in the background.
+App-history collection is opportunistic rather than an always-running daemon.
+
+Existing workspace notifications invalidate app and volume inventory; app-event
+bursts are coalesced over 200ms. Volume enumeration no longer runs every ten
+seconds. IOKit power-source, memory-pressure and thermal notifications remain.
+USB/port inventory still reconciles while hardware is being consumed, because
+the current implementation does not have an IOKit device-matching observer.
+
+Validation: eight SamplingDemand tests cover idle, pause, services, menu-bar,
+recording and alerts. The native sampler budget test passed: full process sample
+averaged 65.5ms versus 7.5ms for system-only telemetry on this machine. These are
+scan-cost measurements, not before/after whole-app CPU or energy measurements.
+
+## Profiling-driven corrections
+
+Demand now reads current application hidden state and the visibility, minimized
+state and occlusion of titled windows. A visible unfocused window remains live.
+Hide/unhide and window occlusion/minimize notifications reschedule the existing
+task; each scheduled wake also reconciles live demand before doing any work.
+There is no added visibility polling timer. Startup and explicit Refresh can
+request one inventory even without a visible consumer.
+
+Process groups are prepared once per inventory result, outside view evaluation.
+A bounded executable-path cache includes misses. Table rendering shares one
+sorted/filtered projection among category rows and the empty-state check; search
+still preserves matching-member behavior and group identity.
+
+Disk capacity is cached independently of disk activity: initial/manual refresh,
+volume enumeration, and at most once per minute on visible Performance. Normal
+telemetry samples reuse the cached capacity instead of querying the filesystem.
+See PROFILING.md for Release measurements and caveats.
diff --git a/Sources/puter/AppUtilitiesViews.swift b/Sources/puter/AppUtilitiesViews.swift
index 3ef47e8..725a5b9 100644
--- a/Sources/puter/AppUtilitiesViews.swift
+++ b/Sources/puter/AppUtilitiesViews.swift
@@ -76,6 +76,7 @@ struct SettingsView: View {
     @Environment(SystemMonitor.self) private var monitor
     @EnvironmentObject private var updates: UpdateController
     @AppStorage("alwaysOnTop") private var alwaysOnTop = false
+    @AppStorage("appAppearance") private var appearance: PuterAppearance = .system
     @AppStorage("defaultStartPage") private var defaultStartPage: TaskSection = .processes
     @AppStorage("diagnosticReportDuration") private var diagnosticDuration = 5
     @AppStorage("diagnosticAskEveryTime") private var diagnosticAskEveryTime = true
@@ -96,6 +97,11 @@ struct SettingsView: View {
             PageHeader(title: "Settings", subtitle: "Customize puter")
             Form {
                 Section("General") {
+                    Picker("Appearance", selection: $appearance) {
+                        ForEach(PuterAppearance.allCases) { appearance in
+                            Text(appearance.rawValue).tag(appearance)
+                        }
+                    }
                     Picker("Default start page", selection: $defaultStartPage) {
                         ForEach(TaskSection.allCases.filter { $0 != .settings }) { section in
                             Text(section.rawValue).tag(section)
@@ -113,9 +119,11 @@ struct SettingsView: View {
                 }
 
                 Section("Process data") {
-                    LabeledContent("Refresh interval", value: intervalLabel)
+                    LabeledContent("Live-view interval", value: intervalLabel)
                     LabeledContent("Process source", value: "macOS process table")
                     LabeledContent("Memory units", value: "Automatic")
+                    Text("Process and service scans run only for visible consumers or recording. Power-source and volume changes use system notifications. With no live consumers, scheduled sampling stops.")
+                        .font(.caption).foregroundStyle(.secondary)
                 }
 
                 Section("Menu bar") {
diff --git a/Sources/puter/BatteryRegistryReader.swift b/Sources/puter/BatteryRegistryReader.swift
new file mode 100644
index 0000000..4987e12
--- /dev/null
+++ b/Sources/puter/BatteryRegistryReader.swift
@@ -0,0 +1,73 @@
+import Foundation
+import IOKit
+
+/// Read typed registry values; `ioreg`'s human-readable indentation is not an API.
+enum BatteryRegistryReader {
+    static func read() -> BatterySnapshot {
+        let service = IOServiceGetMatchingService(kIOMainPortDefault, IOServiceMatching("AppleSmartBattery"))
+        guard service != 0 else { return BatterySnapshot() }
+        defer { IOObjectRelease(service) }
+        var properties: Unmanaged<CFMutableDictionary>?
+        guard IORegistryEntryCreateCFProperties(service, &properties, kCFAllocatorDefault, 0) == KERN_SUCCESS,
+              let values = properties?.takeRetainedValue() as? [String: Any] else { return BatterySnapshot() }
+        return parse(values)
+    }
+
+    static func parse(_ values: [String: Any]) -> BatterySnapshot {
+        let batteryData = values["BatteryData"] as? [String: Any] ?? [:]
+        func number(_ key: String) -> Double { (values[key] as? NSNumber)?.doubleValue ?? 0 }
+        func capacity(_ top: String, _ nested: String) -> Double {
+            (values[top] as? NSNumber)?.doubleValue ?? (batteryData[nested] as? NSNumber)?.doubleValue ?? 0
+        }
+        func flag(_ key: String) -> Bool { (values[key] as? NSNumber)?.boolValue ?? false }
+        let telemetry = values["PowerTelemetryData"] as? [String: Any] ?? [:]
+        func power(_ key: String) -> Double? {
+            guard let value = telemetry[key] as? NSNumber else { return nil }
+            let watts = value.doubleValue / 1_000
+            return watts.isFinite && (0...1_000).contains(watts) ? watts : nil
+        }
+        // IORegistry sometimes represents negative current as an unsigned two's-complement integer.
+        let rawCurrent = (values["Amperage"] as? NSNumber)?.int64Value ?? 0
+        let amps = Double(rawCurrent) / 1_000
+        let voltage = number("Voltage") / 1_000
+        let hasCurrent = values["Amperage"] != nil && abs(amps) <= 100 && voltage > 0 && voltage < 100
+        let external = flag("ExternalConnected")
+        let temperature = number("Temperature")
+        let time = Int(number("TimeRemaining"))
+        var battery = BatterySnapshot(
+            isPresent: flag("BatteryInstalled"), chargePercent: min(100, max(0, number("CurrentCapacity"))),
+            isCharging: flag("IsCharging"), isFullyCharged: flag("FullyCharged"),
+            externalPowerConnected: external, cycleCount: Int(number("CycleCount")),
+            designCycleCount: Int(number("DesignCycleCount9C")),
+            currentCapacityMAh: capacity("AppleRawCurrentCapacity", "RemainingCapacity"),
+            fullChargeCapacityMAh: capacity("NominalChargeCapacity", "NominalChargeCapacity"),
+            designCapacityMAh: capacity("DesignCapacity", "DesignCapacity"),
+            voltageVolts: voltage, currentAmps: hasCurrent ? amps : 0,
+            temperatureCelsius: temperature > 1_000 ? temperature / 10 - 273.15 : temperature,
+            timeRemainingMinutes: time > 0 && time < 65_535 ? time : nil,
+            serial: values["Serial"] as? String ?? "",
+            systemPowerWatts: power("SystemLoad") ?? 0,
+            adapterInputWatts: external ? (power("SystemPowerIn") ?? 0) : 0
+        )
+        battery.hasBatteryCurrent = hasCurrent
+        battery.hasBatteryTemperature = values["Temperature"] != nil
+        battery.hasAdapterInput = external && power("SystemPowerIn") != nil
+        battery.hasSystemPower = power("SystemLoad") != nil
+        if external, let adapter = values["AdapterDetails"] as? [String: Any], !adapter.isEmpty {
+            func n(_ key: String) -> Double { (adapter[key] as? NSNumber)?.doubleValue ?? 0 }
+            let profiles = (adapter["UsbHvcMenu"] as? [[String: Any]] ?? []).compactMap { entry -> PowerProfile? in
+                guard let voltage = entry["MaxVoltage"] as? NSNumber,
+                      let current = entry["MaxCurrent"] as? NSNumber else { return nil }
+                return PowerProfile(voltageVolts: voltage.doubleValue / 1_000, currentAmps: current.doubleValue / 1_000)
+            }
+            battery.adapter = PowerAdapterSnapshot(
+                name: adapter["Name"] as? String ?? "Power adapter",
+                manufacturer: adapter["Manufacturer"] as? String ?? "Not reported",
+                serial: adapter["SerialString"] as? String ?? "", ratedWatts: n("Watts"),
+                negotiatedVoltage: n("AdapterVoltage") / 1_000,
+                negotiatedCurrent: n("Current") / 1_000, profiles: profiles
+            )
+        }
+        return battery
+    }
+}
diff --git a/Sources/puter/Components.swift b/Sources/puter/Components.swift
index ef2ab49..4d9986b 100644
--- a/Sources/puter/Components.swift
+++ b/Sources/puter/Components.swift
@@ -12,17 +12,32 @@ struct PageHeader<Trailing: View>: View {
     }
 
     var body: some View {
-        HStack(alignment: .firstTextBaseline) {
-            VStack(alignment: .leading, spacing: 3) {
-                Text(title).font(.title.weight(.semibold))
-                if let subtitle { Text(subtitle).font(.callout).foregroundStyle(.secondary) }
+        ViewThatFits(in: .horizontal) {
+            HStack(alignment: .firstTextBaseline, spacing: 12) {
+                heading.fixedSize(horizontal: true, vertical: false)
+                Spacer(minLength: 0)
+                GlassActions { trailing() }.fixedSize(horizontal: true, vertical: false)
+            }
+            VStack(alignment: .leading, spacing: 8) {
+                heading.frame(maxWidth: .infinity, alignment: .leading)
+                GlassActions { trailing() }.fixedSize(horizontal: true, vertical: false)
+            }
+        }
+        .padding(.horizontal, PuterLayout.pageInset)
+        .padding(.vertical, PuterLayout.sectionSpacing)
+    }
+
+    private var heading: some View {
+        VStack(alignment: .leading, spacing: 4) {
+            Text(title).font(.title.weight(.semibold)).lineLimit(1)
+            if let subtitle {
+                Text(subtitle)
+                    .font(.callout)
+                    .foregroundStyle(.secondary)
+                    .lineLimit(1)
+                    .help(subtitle)
             }
-            Spacer()
-            trailing()
         }
-        .padding(.horizontal, 20)
-        .padding(.top, 18)
-        .padding(.bottom, 14)
     }
 }
 
@@ -30,19 +45,93 @@ struct ResourceSummaryBar: View {
     let snapshot: SystemSnapshot
 
     var body: some View {
-        HStack(spacing: 22) {
-            Label("\(Formatters.percent(snapshot.cpuPercent)) CPU", systemImage: "cpu")
-            Label("\(Formatters.percent(snapshot.memoryPercent)) Memory", systemImage: "memorychip")
-            Label("\(Formatters.percent(snapshot.diskActivePercent)) Disk activity", systemImage: "internaldrive")
-            Label("\(Formatters.rate(snapshot.networkReceiveRate + snapshot.networkSendRate)) Network", systemImage: "network")
-            Spacer()
+        ViewThatFits(in: .horizontal) {
+            HStack(spacing: PuterLayout.sectionSpacing) {
+                cpu
+                memory
+                disk
+                network
+            }
+            Grid(alignment: .leading, horizontalSpacing: PuterLayout.sectionSpacing, verticalSpacing: 8) {
+                GridRow {
+                    cpu
+                    memory
+                }
+                GridRow {
+                    disk
+                    network
+                }
+            }
         }
-        .font(.callout.weight(.medium))
-        .padding(.horizontal, 20)
-        .padding(.vertical, 9)
-        .background(Color.accentColor.opacity(0.06))
+        .font(.callout)
+        .monospacedDigit()
+        .frame(maxWidth: .infinity, alignment: .leading)
+        .padding(.horizontal, PuterLayout.pageInset)
+        .padding(.bottom, PuterLayout.sectionSpacing)
+        .padding(.top, PuterLayout.controlSpacing)
         .overlay(alignment: .bottom) { Divider() }
     }
+
+    private var cpu: some View {
+        ResourceSummaryMetric(title: "CPU", symbol: "cpu", value: Formatters.percent(snapshot.cpuPercent), color: .blue, percent: snapshot.cpuPercent)
+    }
+    private var memory: some View {
+        ResourceSummaryMetric(title: "Memory", symbol: "memorychip", value: Formatters.percent(snapshot.memoryPercent), color: .purple, percent: snapshot.memoryPercent)
+    }
+    private var disk: some View {
+        ResourceSummaryMetric(title: "Disk activity", symbol: "internaldrive", value: Formatters.percent(snapshot.diskActivePercent), color: .orange, percent: snapshot.diskActivePercent)
+    }
+    private var network: some View {
+        ResourceSummaryMetric(title: "Network", symbol: "network", value: Formatters.rate(snapshot.networkReceiveRate + snapshot.networkSendRate), color: .teal, percent: nil)
+    }
+}
+
+private struct ResourceSummaryMetric: View {
+    let title: String
+    let symbol: String
+    let value: String
+    let color: Color
+    let percent: Double?
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: 6) {
+            Label {
+                Text(title).foregroundStyle(.secondary)
+            } icon: {
+                Image(systemName: symbol).foregroundStyle(color)
+            }
+            .font(.caption.weight(.medium))
+            Text(value).font(.title2.weight(.semibold)).lineLimit(1)
+                .fixedSize(horizontal: true, vertical: false)
+            if let percent {
+                ProgressView(value: min(max(percent, 0), 100), total: 100)
+                    .tint(color)
+                    .accessibilityHidden(true)
+            } else {
+                Text("Receive + send").font(.caption2).foregroundStyle(.secondary)
+            }
+        }
+        .frame(minWidth: 112, alignment: .leading)
+        .frame(maxWidth: .infinity, alignment: .leading)
+        .accessibilityElement(children: .combine)
+    }
+}
+
+struct ProcessInventoryPlaceholder: View {
+    let isLoading: Bool
+    let searchText: String
+
+    var body: some View {
+        if isLoading {
+            ProgressView("Collecting processes…")
+                .controlSize(.small)
+                .frame(maxWidth: .infinity, maxHeight: .infinity)
+        } else if !searchText.isEmpty {
+            ContentUnavailableView.search(text: searchText)
+        } else {
+            ContentUnavailableView("No processes available", systemImage: "list.bullet.rectangle", description: Text("Use Refresh to request a new process snapshot."))
+        }
+    }
 }
 
 struct UpdateStatus: View {
diff --git a/Sources/puter/ContentView.swift b/Sources/puter/ContentView.swift
index cd4b3bf..28ac86a 100644
--- a/Sources/puter/ContentView.swift
+++ b/Sources/puter/ContentView.swift
@@ -9,6 +9,7 @@ struct ContentView: View {
     @Environment(SystemMonitor.self) private var monitor
     @State private var selection: TaskSection?
     @State private var searchText = ""
+    @State private var sectionSearches: [TaskSection: String] = [:]
     @State private var showingNewTask = false
     @State private var detailSelection: Int32?
     @AppStorage("sidebarCompact") private var sidebarCompact = false
@@ -19,23 +20,29 @@ struct ContentView: View {
     }
 
     var body: some View {
-        NavigationSplitView(columnVisibility: .constant(.all)) {
+        HStack(spacing: 0) {
             Sidebar(selection: $selection, compact: sidebarCompact)
-                .navigationSplitViewColumnWidth(
-                    min: sidebarCompact ? 68 : 190,
-                    ideal: sidebarCompact ? 68 : 210,
-                    max: sidebarCompact ? 68 : 260
-                )
-        } detail: {
+                .frame(width: (sidebarCompact ? PuterLayout.compactSidebarWidth : PuterLayout.expandedSidebarWidth) - 16)
+                .modifier(NavigationGlass())
+                .padding(8)
             detailView
-                .toolbar(removing: .sidebarToggle)
+                .frame(maxWidth: .infinity, maxHeight: .infinity)
+                .background(.background, in: .rect(cornerRadius: 16))
+                .clipShape(.rect(cornerRadius: 16))
+                .padding(.vertical, 8)
+                .padding(.trailing, 8)
+        }
+        .frame(maxWidth: .infinity, maxHeight: .infinity)
+        .background(.regularMaterial)
+        .toolbarBackground(.regularMaterial, for: .windowToolbar)
+        .toolbar {
+            TaskToolbarContent(showingNewTask: $showingNewTask, sidebarCompact: $sidebarCompact,
+                               searchText: $searchText, searchPrompt: searchPrompt)
         }
-        .navigationSplitViewStyle(.balanced)
-        .toolbar(removing: .sidebarToggle)
         .navigationTitle("")
-        .background(WindowToolbarCleaner())
-        .onChange(of: selection) { _, section in
-            searchText = ""
+        .onChange(of: selection) { previous, section in
+            sectionSearches[previous ?? .processes] = searchText
+            searchText = sectionSearches[section ?? .processes] ?? ""
             monitor.setActiveSection(section ?? .processes)
         }
         .onReceive(NotificationCenter.default.publisher(for: .runNewTask)) { _ in showingNewTask = true }
@@ -64,34 +71,26 @@ struct ContentView: View {
             switch selection ?? .processes {
             case .processes:
                 ProcessesView(searchText: searchText) { process in
-                    detailSelection = process.pid
-                    selection = .details
+                    showDetails(for: process)
                 }
-                .searchable(text: $searchText, placement: .toolbar, prompt: "Search processes by name, PID, or user")
             case .performance:
                 PerformanceView()
             case .history:
                 AppHistoryView(searchText: searchText) { process in
-                    detailSelection = process.pid
-                    selection = .details
+                    showDetails(for: process)
                 }
-                .searchable(text: $searchText, placement: .toolbar, prompt: "Search app history")
             case .startup:
                 StartupAppsView()
             case .users:
                 UsersView { process in
-                    detailSelection = process.pid
-                    selection = .details
+                    showDetails(for: process)
                 }
             case .details:
                 DetailsView(searchText: searchText, selection: $detailSelection)
-                    .searchable(text: $searchText, placement: .toolbar, prompt: "Search details by name, PID, or user")
             case .services:
                 ServicesView(searchText: searchText) { process in
-                    detailSelection = process.pid
-                    selection = .details
+                    showDetails(for: process)
                 }
-                .searchable(text: $searchText, placement: .toolbar, prompt: "Search services by name, PID, or identifier")
             case .energy:
                 EnergyView()
             case .diagnostics:
@@ -102,132 +101,99 @@ struct ContentView: View {
                 SettingsView()
             }
         }
-        .toolbar {
-            TaskToolbarContent(showingNewTask: $showingNewTask)
+    }
+
+    private var searchPrompt: String? {
+        switch selection ?? .processes {
+        case .processes: "Search processes"
+        case .history: "Search app history"
+        case .details: "Search details"
+        case .services: "Search services"
+        default: nil
         }
     }
 
-}
-
-private struct WindowToolbarCleaner: NSViewRepresentable {
-    func makeNSView(context: Context) -> CleanerView {
-        CleanerView()
+    private func showDetails(for process: ProcessRecord) {
+        sectionSearches[.details] = ""
+        detailSelection = process.pid
+        selection = .details
     }
-
-    func updateNSView(_ nsView: CleanerView, context: Context) {
-        nsView.removeAutomaticSidebarToggle()
-        nsView.installCenteredBrand()
-    }
-
-    final class CleanerView: NSView {
-        private weak var installedTitlebar: NSView?
-
-        override func viewDidMoveToWindow() {
-            super.viewDidMoveToWindow()
-            removeAutomaticSidebarToggle()
-            installCenteredBrand()
-            DispatchQueue.main.async { [weak self] in
-                self?.removeAutomaticSidebarToggle()
-                self?.installCenteredBrand()
-            }
-        }
-
-        func installCenteredBrand() {
-            guard installedTitlebar == nil,
-                  let closeButton = window?.standardWindowButton(.closeButton),
-                  let titlebar = closeButton.superview else { return }
-            let brand = PassthroughHostingView(rootView: PuterBrand(compactTitlebar: true))
-            brand.translatesAutoresizingMaskIntoConstraints = false
-            titlebar.addSubview(brand)
-            NSLayoutConstraint.activate([
-                brand.centerXAnchor.constraint(equalTo: titlebar.centerXAnchor),
-                brand.centerYAnchor.constraint(equalTo: closeButton.centerYAnchor)
-            ])
-            installedTitlebar = titlebar
-        }
-
-        func removeAutomaticSidebarToggle() {
-            guard let toolbar = window?.toolbar,
-                  let index = toolbar.items.firstIndex(where: {
-                      $0.itemIdentifier == .toggleSidebar
-                          || $0.action == NSSelectorFromString("toggleSidebar:")
-                          || $0.label == "Hide Sidebar"
-                          || $0.label == "Show Sidebar"
-                          || $0.toolTip == "Hide Sidebar"
-                          || $0.toolTip == "Show Sidebar"
-                          || $0.view?.accessibilityLabel() == "Hide Sidebar"
-                          || $0.view?.accessibilityLabel() == "Show Sidebar"
-                  }) else { return }
-            toolbar.removeItem(at: index)
-        }
-    }
-}
-
-private final class PassthroughHostingView<Content: View>: NSHostingView<Content> {
-    override func hitTest(_ point: NSPoint) -> NSView? { nil }
 }
 
 private struct TaskToolbarContent: ToolbarContent {
     @Environment(SystemMonitor.self) private var monitor
     @Binding var showingNewTask: Bool
-    @AppStorage("sidebarCompact") private var sidebarCompact = false
+    @Binding var sidebarCompact: Bool
+    @Binding var searchText: String
+    let searchPrompt: String?
 
     var body: some ToolbarContent {
         @Bindable var monitor = monitor
         ToolbarItem(placement: .navigation) {
-            Button {
-                sidebarCompact.toggle()
-            } label: {
-                Image(systemName: "sidebar.left")
+            GlassActions {
+                Button {
+                    sidebarCompact.toggle()
+                } label: {
+                    Image(systemName: "sidebar.left")
+                        .frame(width: 20, height: 20)
+                }
+                .buttonStyle(ToolbarIconButtonStyle())
+                .help(sidebarCompact ? "Expand Sidebar" : "Compact Sidebar")
+                .accessibilityLabel(sidebarCompact ? "Expand Sidebar" : "Compact Sidebar")
             }
-            .help(sidebarCompact ? "Expand Sidebar" : "Compact Sidebar")
-            .accessibilityLabel(sidebarCompact ? "Expand Sidebar" : "Compact Sidebar")
         }
 
-        ToolbarItemGroup(placement: .primaryAction) {
-            Button {
-                showingNewTask = true
-            } label: {
-                Label("Run new task", systemImage: "plus.square")
-            }
-            .help("Launch an application or executable")
-
-            Button {
-                monitor.refresh()
-            } label: {
-                Label("Refresh", systemImage: "arrow.clockwise")
-            }
-            .help("Refresh now (⌘R)")
-
-            Menu {
-                UpdateSpeedPicker(selection: $monitor.updateSpeed)
-            } label: {
-                Image(systemName: "ellipsis")
-            }
-            .menuStyle(.borderlessButton)
+        ToolbarItem(placement: .principal) {
+            PuterBrand()
         }
 
-    }
-}
-
-private struct PuterBrand: View {
-    let compactTitlebar: Bool
-
-    var body: some View {
-        HStack(spacing: 9) {
-            Image(nsImage: NSApp.applicationIconImage)
-                .resizable()
-                .scaledToFit()
-                .frame(width: compactTitlebar ? 21 : 30, height: compactTitlebar ? 21 : 30)
-            Text("puter")
-                .font(compactTitlebar ? .headline : .title2.weight(.semibold))
+        if #available(macOS 26, *) {
+            ToolbarSpacer(.flexible, placement: .primaryAction)
         }
-        .padding(.horizontal, compactTitlebar ? 8 : 14)
-        .frame(height: compactTitlebar ? 32 : 52)
-        .fixedSize()
-        .accessibilityElement(children: .combine)
-        .accessibilityLabel("puter")
-        .accessibilityAddTraits(.isHeader)
+
+        ToolbarItem(placement: .primaryAction) {
+            GlassActions {
+                HStack(spacing: 8) {
+                    Button {
+                        showingNewTask = true
+                    } label: {
+                        Label("Run new task", systemImage: "plus.square")
+                            .frame(width: 20, height: 20)
+                    }
+                    .accessibilityLabel("Run new task")
+                    .buttonStyle(ToolbarIconButtonStyle())
+                    .help("Launch an application or executable")
+
+                    Button {
+                        monitor.refresh()
+                    } label: {
+                        Label("Refresh", systemImage: "arrow.clockwise")
+                            .frame(width: 20, height: 20)
+                    }
+                    .accessibilityLabel("Refresh")
+                    .buttonStyle(ToolbarIconButtonStyle())
+                    .help("Refresh now (⌘R)")
+
+                    Menu {
+                        UpdateSpeedPicker(selection: $monitor.updateSpeed)
+                    } label: {
+                        Label("Update speed", systemImage: "ellipsis")
+                    }
+                    .menuStyle(.borderlessButton)
+                    .fixedSize()
+                    .padding(.horizontal, 12)
+                    .frame(height: PuterLayout.toolbarControlHeight)
+                    .modifier(SearchGlassSurface())
+
+                    if let searchPrompt {
+                        ToolbarSearchField(text: $searchText, prompt: searchPrompt)
+                    }
+                }
+                .labelStyle(.iconOnly)
+                .buttonBorderShape(.circle)
+            }
+        }
+
     }
 }
 
@@ -247,6 +213,7 @@ private struct Sidebar: View {
             }
         }
         .listStyle(.sidebar)
+        .scrollContentBackground(.hidden)
         .scrollIndicators(compact ? .hidden : .automatic)
         .accessibilityLabel("Navigation")
     }
@@ -261,11 +228,12 @@ private struct Sidebar: View {
                 Spacer(minLength: 0)
             }
         }
-        .frame(maxWidth: .infinity, minHeight: compact ? 28 : nil, alignment: compact ? .center : .leading)
+        .frame(maxWidth: .infinity, alignment: compact ? .center : .leading)
+        .frame(height: PuterLayout.sidebarRowHeight)
         .contentShape(Rectangle())
         .tag(section)
         .help(section.rawValue)
         .accessibilityLabel(section.rawValue)
-        .listRowInsets(compact ? EdgeInsets(top: 4, leading: 8, bottom: 4, trailing: 8) : nil)
+        .listRowInsets(EdgeInsets(top: 2, leading: 8, bottom: 2, trailing: 8))
     }
 }
diff --git a/Sources/puter/HardwareView.swift b/Sources/puter/HardwareView.swift
index 2948fba..26d55f3 100644
--- a/Sources/puter/HardwareView.swift
+++ b/Sources/puter/HardwareView.swift
@@ -65,7 +65,7 @@ struct HardwareView: View {
         LazyVGrid(columns: [GridItem(.adaptive(minimum: 180), spacing: 10)], spacing: 10) {
             summaryCard("CPU", value: Formatters.percent(monitor.snapshot.cpuPercent), detail: "\(monitor.snapshot.corePercents.count) logical processors", icon: "cpu", color: .blue)
             summaryCard("Memory", value: Formatters.percent(monitor.snapshot.memoryPercent), detail: Formatters.bytes.string(fromByteCount: Int64(monitor.snapshot.memoryUsed)), icon: "memorychip", color: .purple)
-            summaryCard("System power", value: watts(battery.systemPowerWatts), detail: battery.externalPowerConnected ? "External power" : "Battery power", icon: "bolt.fill", color: .orange)
+            summaryCard("System power", value: watts(battery.systemPowerWatts), detail: battery.powerSourceDescription, icon: "bolt.fill", color: .orange)
             summaryCard("Thermals", value: monitor.hardware.thermalState, detail: thermalDetail, icon: "thermometer.medium", color: thermalColor)
         }
     }
@@ -102,19 +102,19 @@ struct HardwareView: View {
             HStack(alignment: .firstTextBaseline) {
                 metric("Charge", Formatters.percent(battery.chargePercent))
                 Spacer()
-                metric("Condition", battery.healthPercent > 80 ? "Normal" : "Service recommended")
+                metric("Capacity status", battery.designCapacityMAh > 0 ? (battery.healthPercent > 80 ? "Normal capacity" : "Reduced capacity") : "Not reported")
                 Spacer()
-                metric("Health", Formatters.percent(battery.healthPercent))
+                metric("Health", battery.designCapacityMAh > 0 ? Formatters.percent(battery.healthPercent) : "Not reported")
             }
             HStack(alignment: .firstTextBaseline) {
                 metric("Cycles", cycleText)
                 Spacer()
-                metric("Temperature", String(format: "%.1f °C", battery.temperatureCelsius))
+                metric("Temperature", battery.hasBatteryTemperature ? String(format: "%.1f °C", battery.temperatureCelsius) : "Not reported")
                 Spacer()
                 metric("Voltage", String(format: "%.2f V", battery.voltageVolts))
             }
             HStack(alignment: .firstTextBaseline) {
-                metric("Battery power", watts(battery.batteryPowerWatts))
+                metric(battery.batteryFlowTitle, battery.measuredBatteryWatts.map { String(format: "%.1f W", $0) } ?? "Not reported")
                 Spacer()
                 metric("Full capacity", capacity(battery.fullChargeCapacityMAh))
                 Spacer()
@@ -145,14 +145,17 @@ struct HardwareView: View {
                         Text(adapter.manufacturer).font(.caption).foregroundStyle(.secondary)
                     }
                     Spacer()
-                    Text("\(Int(adapter.ratedWatts.rounded())) W").font(.title2.weight(.semibold)).monospacedDigit()
+                    VStack(alignment: .trailing, spacing: 2) {
+                        Text("\(Int(adapter.ratedWatts.rounded())) W").font(.title2.weight(.semibold)).monospacedDigit()
+                        Text("Reported capability").font(.caption).foregroundStyle(.secondary)
+                    }
                 }
                 Divider()
                 HStack(spacing: 24) {
                     metric("Negotiated voltage", String(format: "%.1f V", adapter.negotiatedVoltage))
                     metric("Current limit", String(format: "%.2f A", adapter.negotiatedCurrent))
                     metric("Negotiated ceiling", watts(adapter.negotiatedWatts))
-                    metric("Adapter input", watts(battery.adapterInputWatts))
+                    metric("Charger → Mac", battery.hasAdapterInput ? String(format: "%.1f W", battery.adapterInputWatts) : "Not reported")
                     metric("System draw", watts(battery.systemPowerWatts))
                     Spacer()
                 }
@@ -465,7 +468,7 @@ struct HardwareView: View {
     private var verdictDetail: String {
         guard battery.isPresent else { return "Battery-specific fields are hidden because this Mac reports no internal battery." }
         if let adapter = battery.adapter {
-            return "macOS reports a \(Int(adapter.ratedWatts.rounded())) W adapter and a \(watts(adapter.negotiatedWatts)) negotiated ceiling. Current system input is \(watts(battery.systemPowerWatts))."
+            return "macOS reports \(Int(adapter.ratedWatts.rounded())) W available and a \(watts(adapter.negotiatedWatts)) negotiated ceiling. Measured charger input is \(battery.hasAdapterInput ? watts(battery.adapterInputWatts) : "not reported"); system load is \(watts(battery.systemPowerWatts)). Input includes charging and is not a wall-socket measurement."
         }
         return "Current battery draw is \(watts(battery.batteryPowerWatts)). Charger and cable capability are shown only when macOS publishes them."
     }
diff --git a/Sources/puter/MenuBarGlassSurface.swift b/Sources/puter/MenuBarGlassSurface.swift
new file mode 100644
index 0000000..753e589
--- /dev/null
+++ b/Sources/puter/MenuBarGlassSurface.swift
@@ -0,0 +1,15 @@
+import SwiftUI
+
+/// NSPopover owns the outer material and corner geometry. Adding a second
+/// glass rectangle creates mismatched corner arcs inside the native shell.
+struct MenuBarGlassSurface: ViewModifier {
+    @Environment(\.accessibilityReduceTransparency) private var reduceTransparency
+
+    @ViewBuilder func body(content: Content) -> some View {
+        if reduceTransparency {
+            content.background(.background)
+        } else {
+            content
+        }
+    }
+}
diff --git a/Sources/puter/MenuBarMonitorActions.swift b/Sources/puter/MenuBarMonitorActions.swift
new file mode 100644
index 0000000..8b2ec92
--- /dev/null
+++ b/Sources/puter/MenuBarMonitorActions.swift
@@ -0,0 +1,19 @@
+import SwiftUI
+
+struct MenuBarMonitorActions: View {
+    @Environment(SystemMonitor.self) private var monitor
+    @AppStorage("menuBarMetric") private var metric: MenuBarMetric = .cpu
+
+    var body: some View {
+        @Bindable var monitor = monitor
+        Picker("Menu bar reading", selection: $metric) {
+            ForEach(MenuBarMetric.allCases) { Text($0.rawValue).tag($0) }
+        }.pickerStyle(.menu)
+        Picker("Update speed", selection: $monitor.updateSpeed) {
+            ForEach(UpdateSpeed.allCases) { Text($0.rawValue).tag($0) }
+        }.pickerStyle(.menu)
+        Divider()
+        Button(monitor.isPaused ? "Resume updates" : "Pause updates") { monitor.isPaused.toggle() }
+        Button("Refresh now", systemImage: "arrow.clockwise", action: monitor.refresh)
+    }
+}
diff --git a/Sources/puter/MenuBarMonitorView.swift b/Sources/puter/MenuBarMonitorView.swift
index 8a0a939..31cb9ab 100644
--- a/Sources/puter/MenuBarMonitorView.swift
+++ b/Sources/puter/MenuBarMonitorView.swift
@@ -2,95 +2,60 @@ import AppKit
 import SwiftUI
 
 struct MenuBarMonitorView: View {
+    var openMain: (() -> Void)? = nil
     @Environment(SystemMonitor.self) private var monitor
     @Environment(\.openWindow) private var openWindow
-
-    private var topProcesses: [ProcessRecord] {
-        monitor.processes.sorted { $0.cpu > $1.cpu }.prefix(5).map { $0 }
-    }
+    @AppStorage("appAppearance") private var appearance: PuterAppearance = .system
 
     var body: some View {
-        VStack(alignment: .leading, spacing: 12) {
-            HStack(spacing: 10) {
-                Image(nsImage: NSApp.applicationIconImage).resizable().scaledToFit().frame(width: 30, height: 30)
-                VStack(alignment: .leading, spacing: 2) {
-                    Text("puter").font(.headline)
-                    if let updated = monitor.lastUpdated {
-                        Text("Updated \(updated, style: .relative)").font(.caption).foregroundStyle(.secondary)
-                    } else { Text("Collecting…").font(.caption).foregroundStyle(.secondary) }
-                }
+        VStack(alignment: .leading, spacing: 16) {
+            HStack(spacing: 12) {
+                Text("puter").font(.system(size: 23, weight: .bold, design: .rounded))
                 Spacer()
-                Circle().fill(monitor.isPaused ? .orange : .green).frame(width: 8, height: 8)
+                Label(monitor.isPaused ? "Paused" : "Live", systemImage: monitor.isPaused ? "pause.circle" : "waveform.path")
+                    .font(.caption.weight(.medium)).foregroundStyle(.secondary)
+                Menu { MenuBarMonitorActions() } label: {
+                    Image(systemName: "ellipsis").accessibilityLabel("Monitor options")
+                }
+                .modifier(GlassMenuSurface())
             }
+            HStack(spacing: 24) {
+                MenuBarResourceValue(title: "CPU", value: Formatters.percent(monitor.snapshot.cpuPercent), symbol: "cpu", color: .blue)
+                MenuBarResourceValue(title: "Memory", value: Formatters.percent(monitor.snapshot.memoryPercent), symbol: "memorychip", color: .purple)
+            }
+            .padding(16)
+            .background(.background.opacity(0.65), in: .rect(cornerRadius: 16))
 
-            HStack(spacing: 8) {
-                metric("CPU", Formatters.percent(monitor.snapshot.cpuPercent), .blue)
-                metric("Memory", Formatters.percent(monitor.snapshot.memoryPercent), pressureColor)
-            }
-            HStack(spacing: 8) {
-                metric("Network", Formatters.rate(monitor.snapshot.networkReceiveRate + monitor.snapshot.networkSendRate), .teal)
-                metric("Power", powerText, .orange)
-            }
+            MenuBarPowerView(battery: monitor.hardware.battery, capturedAt: monitor.hardware.capturedAt, paused: monitor.isPaused)
 
             HStack {
-                Label("Memory pressure", systemImage: "memorychip")
+                Label("Network", systemImage: "network")
                 Spacer()
-                Text(monitor.snapshot.memoryPressure.rawValue).foregroundStyle(pressureColor)
+                Text(Formatters.rate(monitor.snapshot.networkReceiveRate + monitor.snapshot.networkSendRate)).monospacedDigit()
             }
-            .font(.caption.weight(.medium))
+            .font(.callout).foregroundStyle(.secondary)
 
-            Divider()
-            Text("Top CPU processes").font(.caption.weight(.semibold)).foregroundStyle(.secondary)
-            if topProcesses.isEmpty {
-                Text("No process data yet").font(.caption).foregroundStyle(.secondary)
-            } else {
-                ForEach(topProcesses) { process in
-                    HStack(spacing: 8) {
-                        ProcessIcon(name: process.displayName, path: process.executablePath, size: 18)
-                        Text(process.displayName).font(.caption).lineLimit(1)
-                        Spacer()
-                        Text(Formatters.percent(process.cpu)).font(.caption.monospacedDigit())
-                    }
+            GlassActions {
+                HStack(spacing: 8) {
+                    Button(monitor.isPaused ? "Resume" : "Pause", systemImage: monitor.isPaused ? "play" : "pause") {
+                        monitor.isPaused.toggle()
+                    }.labelStyle(.iconOnly)
+                    Button("Refresh", systemImage: "arrow.clockwise", action: monitor.refresh).labelStyle(.iconOnly)
+                    Spacer()
+                    Button("Open puter", systemImage: "arrow.up.right", action: showMainWindow)
                 }
             }
-
-            Divider()
-            HStack {
-                Button(monitor.isPaused ? "Resume" : "Pause") { monitor.isPaused.toggle() }
-                Button("Refresh") { monitor.refresh() }
-                Spacer()
-                Button("Open puter") {
-                    openWindow(id: "main")
-                    NSApp.activate()
-                }
-                .buttonStyle(.borderedProminent)
-            }
-            .controlSize(.small)
         }
-        .padding(14)
-        .frame(width: 320)
+        .padding(20)
+        .frame(width: 368)
+        .modifier(MenuBarGlassSurface())
+        .preferredColorScheme(appearance.colorScheme)
+        .contextMenu { MenuBarMonitorActions() }
     }
 
-    private func metric(_ title: String, _ value: String, _ color: Color) -> some View {
-        VStack(alignment: .leading, spacing: 3) {
-            Text(title).font(.caption2).foregroundStyle(.secondary)
-            Text(value).font(.callout.weight(.semibold).monospacedDigit()).lineLimit(1).minimumScaleFactor(0.7)
-        }
-        .frame(maxWidth: .infinity, alignment: .leading)
-        .padding(9)
-        .background(color.opacity(0.09), in: RoundedRectangle(cornerRadius: 8))
-    }
-
-    private var pressureColor: Color {
-        switch monitor.snapshot.memoryPressure {
-        case .normal: .green
-        case .warning: .orange
-        case .critical: .red
-        }
-    }
-
-    private var powerText: String {
-        let watts = monitor.hardware.battery.systemPowerWatts
-        return watts > 0 ? String(format: "%.1f W", watts) : "Not reported"
+    private func showMainWindow() {
+        if let openMain { openMain(); return }
+        openWindow(id: "main")
+        NSApp.activate()
     }
 }
diff --git a/Sources/puter/MenuBarPowerView.swift b/Sources/puter/MenuBarPowerView.swift
new file mode 100644
index 0000000..077aa6c
--- /dev/null
+++ b/Sources/puter/MenuBarPowerView.swift
@@ -0,0 +1,43 @@
+import SwiftUI
+
+struct MenuBarPowerView: View {
+    let battery: BatterySnapshot
+    let capturedAt: Date
+    let paused: Bool
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: 12) {
+            HStack {
+                Text("Power flow").font(.headline)
+                Spacer()
+                if battery.isPresent {
+                    Label("\(Int(battery.chargePercent))%", systemImage: battery.isCharging ? "battery.100percent.bolt" : "battery.75percent")
+                        .font(.callout.weight(.medium))
+                }
+            }
+            Text(battery.powerSourceDescription).font(.caption).foregroundStyle(.secondary)
+            PowerReadingRow(title: "System load", symbol: "desktopcomputer",
+                            watts: battery.hasSystemPower ? battery.systemPowerWatts : nil,
+                            detail: "Power used by the Mac, excluding battery charging.")
+            if battery.isPresent {
+                PowerReadingRow(title: battery.batteryFlowTitle,
+                                symbol: battery.currentAmps < 0 ? "arrow.up.right" : "arrow.down.left",
+                                watts: battery.measuredBatteryWatts,
+                                detail: "Battery voltage × signed current; charging adds energy, discharging supplies the Mac.")
+            }
+            if battery.externalPowerConnected {
+                PowerReadingRow(title: "Charger → Mac", symbol: "powerplug",
+                                watts: battery.hasAdapterInput ? battery.adapterInputWatts : nil,
+                                detail: "Measured input at the Mac, including charging. Not wall-socket consumption or the charger's rated maximum.")
+            }
+            if let adapter = battery.adapter {
+                Divider()
+                Text(adapter.name).font(.callout.weight(.medium)).fixedSize(horizontal: false, vertical: true)
+                Text(String(format: "%.0f W available · %.1f V × %.2f A limit", adapter.ratedWatts, adapter.negotiatedVoltage, adapter.negotiatedCurrent))
+                    .font(.caption).foregroundStyle(.secondary).fixedSize(horizontal: false, vertical: true)
+            }
+            Text(paused ? "Readings paused" : (capturedAt == .distantPast ? "Reading power…" : "Power sampled \(capturedAt.formatted(date: .omitted, time: .standard))"))
+                .font(.caption2).foregroundStyle(.secondary)
+        }
+    }
+}
diff --git a/Sources/puter/MenuBarResourceValue.swift b/Sources/puter/MenuBarResourceValue.swift
new file mode 100644
index 0000000..5fcf6a3
--- /dev/null
+++ b/Sources/puter/MenuBarResourceValue.swift
@@ -0,0 +1,17 @@
+import SwiftUI
+
+struct MenuBarResourceValue: View {
+    let title: String
+    let value: String
+    let symbol: String
+    let color: Color
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: 8) {
+            Label(title, systemImage: symbol).font(.caption.weight(.medium)).foregroundStyle(color)
+            Text(value).font(.system(size: 28, weight: .medium, design: .rounded)).monospacedDigit()
+        }
+        .frame(maxWidth: .infinity, alignment: .leading)
+        .accessibilityElement(children: .combine)
+    }
+}
diff --git a/Sources/puter/Models.swift b/Sources/puter/Models.swift
index 73d0c19..ad6fdde 100644
--- a/Sources/puter/Models.swift
+++ b/Sources/puter/Models.swift
@@ -81,6 +81,27 @@ struct BatterySnapshot: Hashable, Sendable {
     var systemPowerWatts = 0.0
     var sensorBatteryPowerWatts = 0.0
     var adapterInputWatts = 0.0
+    var hasBatteryCurrent = false
+    var hasBatteryTemperature = false
+    var hasAdapterInput = false
+    var hasSystemPower = false
+
+    var batteryFlowTitle: String {
+        if !isPresent { return "Battery unavailable" }
+        if currentAmps < 0 { return "Battery discharge" }
+        if isCharging || currentAmps > 0 { return "Battery charging" }
+        return "Battery idle"
+    }
+
+    var powerSourceDescription: String {
+        !isPresent ? "External power" : (externalPowerConnected ? "Charger connected" : "On battery")
+    }
+
+    var measuredBatteryWatts: Double? {
+        guard isPresent else { return nil }
+        if hasBatteryCurrent { return abs(voltageVolts * currentAmps) }
+        return sensorBatteryPowerWatts > 0 ? sensorBatteryPowerWatts : nil
+    }
 
     var healthPercent: Double {
         guard designCapacityMAh > 0 else { return 0 }
@@ -88,6 +109,7 @@ struct BatterySnapshot: Hashable, Sendable {
     }
 
     var batteryPowerWatts: Double {
+        if hasBatteryCurrent { return abs(voltageVolts * currentAmps) }
         if sensorBatteryPowerWatts > 0 { return sensorBatteryPowerWatts }
         let watts = abs(voltageVolts * currentAmps)
         return watts.isFinite && watts <= 500 ? watts : 0
@@ -256,7 +278,10 @@ enum MenuBarMetric: String, CaseIterable, Identifiable {
     case memory = "Memory"
     case network = "Network"
     case power = "Power"
+    case batteryPower = "Battery power"
+    case chargerInput = "Charger input"
     var id: String { rawValue }
+    var requiresPower: Bool { [.power, .batteryPower, .chargerInput].contains(self) }
 }
 
 struct ProcessRecord: Identifiable, Hashable, Sendable {
@@ -505,6 +530,7 @@ enum Formatters {
     static let bytes: ByteCountFormatter = {
         let formatter = ByteCountFormatter()
         formatter.countStyle = .memory
+        formatter.allowsNonnumericFormatting = false
         formatter.allowedUnits = [.useKB, .useMB, .useGB, .useTB]
         return formatter
     }()
diff --git a/Sources/puter/PerformanceView.swift b/Sources/puter/PerformanceView.swift
index 98de10c..c85b843 100644
--- a/Sources/puter/PerformanceView.swift
+++ b/Sources/puter/PerformanceView.swift
@@ -65,7 +65,7 @@ struct PerformanceView: View {
             }
             HStack(spacing: 0) {
                 ScrollView {
-                    VStack(spacing: 10) {
+                    VStack(spacing: 4) {
                         metricCard(.cpu, value: monitor.snapshot.cpuPercent, detail: "\(ProcessInfo.processInfo.activeProcessorCount) logical processors")
                         metricCard(.memory, value: monitor.snapshot.memoryPercent, detail: "\(Formatters.bytes.string(fromByteCount: Int64(monitor.snapshot.memoryUsed))) of \(Formatters.bytes.string(fromByteCount: Int64(monitor.snapshot.memoryTotal))) • \(monitor.snapshot.memoryPressure.rawValue) pressure")
                         metricCard(
@@ -89,10 +89,10 @@ struct PerformanceView: View {
                             detail: "↓ \(Formatters.rate(monitor.snapshot.networkReceiveRate))  ↑ \(Formatters.rate(monitor.snapshot.networkSendRate))"
                         )
                     }
-                    .padding(14)
+                    .padding(10)
                 }
-                .frame(minWidth: 190, idealWidth: 245, maxWidth: 245)
-                .background(Color(nsColor: .controlBackgroundColor).opacity(0.45))
+                .frame(minWidth: 220, idealWidth: 245, maxWidth: 280)
+                .background(Color(nsColor: .controlBackgroundColor).opacity(0.25))
                 Divider()
                 VStack(spacing: 0) {
                     detail
@@ -184,56 +184,59 @@ struct PerformanceView: View {
             selectedVolumeID = nil
             selectedMetric = metric
         } label: {
-            HStack(spacing: 12) {
+            HStack(alignment: .top, spacing: 10) {
                 Image(systemName: metric.icon)
-                    .font(.title3)
+                    .font(.body)
                     .foregroundStyle(metric.color)
-                    .frame(width: 30)
-                VStack(alignment: .leading, spacing: 3) {
-                    Text(metric.rawValue).font(.headline)
-                    Text(valueText ?? Formatters.percent(value)).font(.title3.monospacedDigit())
-                    Text(detail).font(.caption).foregroundStyle(.secondary).lineLimit(1)
+                    .frame(width: 22)
+                    .padding(.top, 2)
+                VStack(alignment: .leading, spacing: 4) {
+                    HStack(alignment: .firstTextBaseline, spacing: 6) {
+                        Text(metric.rawValue).font(.headline)
+                        Spacer(minLength: 0)
+                        Text(valueText ?? Formatters.percent(value))
+                            .font(.callout.monospacedDigit())
+                    }
+                    Text(detail)
+                        .font(.caption)
+                        .foregroundStyle(.secondary)
+                        .lineLimit(2)
+                        .frame(maxWidth: .infinity, alignment: .leading)
                 }
-                Spacer()
             }
-            .padding(12)
+            .padding(.horizontal, 10)
+            .padding(.vertical, 9)
             .frame(maxWidth: .infinity, alignment: .leading)
-            .background(selectedVolumeID == nil && selectedMetric == metric ? metric.color.opacity(0.13) : Color(nsColor: .windowBackgroundColor))
-            .overlay {
-                RoundedRectangle(cornerRadius: 9)
-                    .stroke(
-                        selectedVolumeID == nil && selectedMetric == metric ? metric.color : Color.secondary.opacity(0.15),
-                        lineWidth: selectedVolumeID == nil && selectedMetric == metric ? 1.5 : 1
-                    )
-            }
-            .clipShape(RoundedRectangle(cornerRadius: 9))
+            .background(selectedVolumeID == nil && selectedMetric == metric ? Color.accentColor.opacity(0.13) : .clear)
+            .clipShape(RoundedRectangle(cornerRadius: 7))
         }
         .buttonStyle(.plain)
     }
 
     private func volumeCard(_ volume: VolumeSnapshot) -> some View {
         Button { selectedVolumeID = volume.id } label: {
-            HStack(spacing: 12) {
+            HStack(alignment: .top, spacing: 10) {
                 Image(systemName: volume.isEjectable ? "externaldrive.badge.checkmark" : "externaldrive")
-                    .font(.title3)
+                    .font(.body)
                     .foregroundStyle(.orange)
-                    .frame(width: 30)
-                VStack(alignment: .leading, spacing: 3) {
-                    Text(volume.name).font(.headline).lineLimit(1)
-                    Text(Formatters.percent(volume.usedPercent)).font(.title3.monospacedDigit())
+                    .frame(width: 22)
+                    .padding(.top, 2)
+                VStack(alignment: .leading, spacing: 4) {
+                    HStack(alignment: .firstTextBaseline, spacing: 6) {
+                        Text(volume.name).font(.headline).lineLimit(1)
+                        Spacer(minLength: 0)
+                        Text(Formatters.percent(volume.usedPercent))
+                            .font(.callout.monospacedDigit())
+                    }
                     Text("\(Formatters.bytes.string(fromByteCount: Int64(volume.capacity))) • \(volume.fileSystem)")
-                        .font(.caption).foregroundStyle(.secondary).lineLimit(1)
+                        .font(.caption).foregroundStyle(.secondary).lineLimit(2)
                 }
-                Spacer()
             }
-            .padding(12)
+            .padding(.horizontal, 10)
+            .padding(.vertical, 9)
             .frame(maxWidth: .infinity, alignment: .leading)
-            .background(selectedVolumeID == volume.id ? Color.orange.opacity(0.13) : Color(nsColor: .windowBackgroundColor))
-            .overlay {
-                RoundedRectangle(cornerRadius: 9)
-                    .stroke(selectedVolumeID == volume.id ? Color.orange : Color.secondary.opacity(0.15), lineWidth: selectedVolumeID == volume.id ? 1.5 : 1)
-            }
-            .clipShape(RoundedRectangle(cornerRadius: 9))
+            .background(selectedVolumeID == volume.id ? Color.accentColor.opacity(0.13) : .clear)
+            .clipShape(RoundedRectangle(cornerRadius: 7))
         }
         .buttonStyle(.plain)
         .accessibilityLabel("\(volume.name), removable disk")
diff --git a/Sources/puter/PowerReadingRow.swift b/Sources/puter/PowerReadingRow.swift
new file mode 100644
index 0000000..c3d9994
--- /dev/null
+++ b/Sources/puter/PowerReadingRow.swift
@@ -0,0 +1,33 @@
+import AppKit
+import SwiftUI
+
+struct PowerReadingRow: View {
+    let title: String
+    let symbol: String
+    let watts: Double?
+    let detail: String
+    private var value: String { watts.map { String(format: "%.1f W", $0) } ?? "Not reported" }
+
+    var body: some View {
+        HStack(spacing: 12) {
+            Image(systemName: symbol).foregroundStyle(.secondary).frame(width: 20)
+            Text(title).font(.callout)
+            Spacer(minLength: 8)
+            Text(value).font(.callout.weight(.semibold)).monospacedDigit()
+        }
+        .padding(.vertical, 4)
+        .contentShape(.rect)
+        .help(detail)
+        .accessibilityElement(children: .ignore)
+        .accessibilityLabel(title)
+        .accessibilityValue(value)
+        .accessibilityHint(detail)
+        .contextMenu {
+            Button("Copy \(title)", systemImage: "doc.on.doc") {
+                NSPasteboard.general.clearContents()
+                NSPasteboard.general.setString("\(title): \(value)", forType: .string)
+            }
+            Text(detail)
+        }
+    }
+}
diff --git a/Sources/puter/ProcessViews.swift b/Sources/puter/ProcessViews.swift
index d0ecae3..77f7117 100644
--- a/Sources/puter/ProcessViews.swift
+++ b/Sources/puter/ProcessViews.swift
@@ -70,7 +70,7 @@ private enum ProcessColumn: String, CaseIterable, Codable {
     }
 }
 
-private enum ProcessCategory: String, CaseIterable, Identifiable {
+enum ProcessCategory: String, CaseIterable, Identifiable {
     case apps = "Apps"
     case background = "Background processes"
     case system = "macOS processes"
@@ -100,7 +100,7 @@ struct ProcessesView: View {
     @AppStorage("processPreviewPaneVisible") private var previewPaneVisible = false
 
     private var grouped: [ProcessGroup] {
-        let groups = ProcessGrouping.groups(from: monitor.processes, searchText: searchText)
+        let groups = ProcessGrouping.filtered(monitor.processGroups, searchText: searchText)
         if groupByType {
             return groups.sorted {
                 let leftCategory = ProcessCategory.allCases.firstIndex(of: $0.category) ?? 0
@@ -150,7 +150,6 @@ struct ProcessesView: View {
                     } label: {
                         Label(previewPaneVisible ? "Hide preview" : "Show preview", systemImage: "sidebar.right")
                     }
-                    .buttonStyle(.bordered)
                     .help(previewPaneVisible ? "Hide process preview" : "Show process preview")
                 }
             }
@@ -211,6 +210,11 @@ struct ProcessesView: View {
     }
 
     private var processList: some View {
+        let visibleGroups = displayedGroups
+        return processList(groups: visibleGroups)
+    }
+
+    private func processList(groups visibleGroups: [ProcessGroup]) -> some View {
         VStack(spacing: 0) {
             ScrollView(.horizontal) {
                 VStack(spacing: 0) {
@@ -236,7 +240,7 @@ struct ProcessesView: View {
                         LazyVStack(spacing: 0) {
                             if groupByType {
                                 ForEach(ProcessCategory.allCases) { category in
-                                    let categoryGroups = displayedGroups.filter { $0.category == category }
+                                    let categoryGroups = visibleGroups.filter { $0.category == category }
                                     if !categoryGroups.isEmpty {
                                         ProcessCategoryHeader(
                                             category: category,
@@ -258,7 +262,7 @@ struct ProcessesView: View {
                                     }
                                 }
                             } else {
-                                ForEach(displayedGroups) { group in
+                                ForEach(visibleGroups) { group in
                                     processGroup(group)
                                 }
                             }
@@ -268,6 +272,11 @@ struct ProcessesView: View {
                 .frame(width: processTableWidth, alignment: .leading)
             }
             .frame(maxWidth: .infinity, maxHeight: .infinity)
+            .overlay {
+                if visibleGroups.isEmpty {
+                    ProcessInventoryPlaceholder(isLoading: monitor.lastUpdated == nil, searchText: searchText)
+                }
+            }
             Divider()
             HStack {
                 UpdateStatus()
@@ -447,7 +456,7 @@ private struct ProcessCategoryHeader: View {
     }
 }
 
-private struct ProcessGroup: Identifiable {
+struct ProcessGroup: Identifiable {
     let id: String
     let name: String
     let appPath: String?
@@ -476,7 +485,11 @@ private struct ProcessGroup: Identifiable {
     }
 }
 
-private enum ProcessGrouping {
+@MainActor
+enum ProcessGrouping {
+    // Cache both hits and misses; executable paths are immutable keys. Bound
+    // storage so long monitoring sessions don't retain every historical path.
+    private static var appPaths: [String: String] = [:]
     static func groups(from processes: [ProcessRecord], searchText: String) -> [ProcessGroup] {
         let foregroundPIDs = Set(NSWorkspace.shared.runningApplications
             .filter { $0.activationPolicy == .regular }
@@ -484,13 +497,22 @@ private enum ProcessGrouping {
         let grouped = Dictionary(grouping: processes) { process -> String in
             appPath(for: process.executablePath) ?? "pid:\(process.pid)"
         }
-        return grouped.compactMap { key, members in
+        let groups = grouped.map { key, members in
             let path = key.hasPrefix("pid:") ? nil : key
             let name = path.map { URL(fileURLWithPath: $0).deletingPathExtension().lastPathComponent }
                 ?? members[0].displayName
             let category = category(for: members, appPath: path, foregroundPIDs: foregroundPIDs)
             let group = ProcessGroup(id: key, name: name, appPath: path, processes: members, category: category)
-            guard !searchText.isEmpty else { return group }
+            return group
+        }
+        return filtered(groups, searchText: searchText)
+    }
+
+    static func filtered(_ groups: [ProcessGroup], searchText: String) -> [ProcessGroup] {
+        guard !searchText.isEmpty else { return groups }
+        return groups.compactMap { group in
+            let name = group.name
+            let members = group.processes
             let groupMatches = name.localizedCaseInsensitiveContains(searchText)
             let matchingMembers = members.filter {
                 $0.displayName.localizedCaseInsensitiveContains(searchText)
@@ -499,11 +521,11 @@ private enum ProcessGrouping {
             }
             guard groupMatches || !matchingMembers.isEmpty else { return nil }
             return ProcessGroup(
-                id: key,
+                id: group.id,
                 name: name,
-                appPath: path,
+                appPath: group.appPath,
                 processes: groupMatches ? members : matchingMembers,
-                category: category
+                category: group.category
             )
         }
     }
@@ -527,8 +549,12 @@ private enum ProcessGrouping {
     }
 
     private static func appPath(for executablePath: String) -> String? {
-        guard let range = executablePath.range(of: ".app/Contents/", options: .caseInsensitive) else { return nil }
-        return String(executablePath[..<range.lowerBound]) + ".app"
+        if let cached = appPaths[executablePath] { return cached.isEmpty ? nil : cached }
+        let path = executablePath.range(of: ".app/Contents/", options: .caseInsensitive)
+            .map { String(executablePath[..<$0.lowerBound]) + ".app" }
+        if appPaths.count >= 4096 { appPaths.removeAll(keepingCapacity: true) }
+        appPaths[executablePath] = path ?? ""
+        return path
     }
 }
 
@@ -702,7 +728,7 @@ private struct ProcessRow: View {
                 } else {
                     Color.clear.frame(width: 16)
                 }
-                ProcessIcon(name: process.displayName, path: process.executablePath)
+                ProcessIcon(name: process.displayName, path: process.executablePath, size: 26)
                 VStack(alignment: .leading, spacing: 2) {
                     Text(process.displayName).lineLimit(1).truncationMode(.tail)
                     Text(process.user).font(.caption).foregroundStyle(.secondary).lineLimit(1).truncationMode(.tail)
@@ -728,7 +754,7 @@ private struct ProcessRow: View {
         }
         .font(.callout)
         .padding(.horizontal, 16)
-        .frame(minHeight: 48)
+        .frame(minHeight: 42)
         .background(selected ? Color.accentColor.opacity(0.18) : Color.clear)
         .overlay(alignment: .bottom) { Divider().opacity(0.45) }
     }
@@ -777,17 +803,18 @@ private struct ProcessGroupRow: View {
                     Image(systemName: "chevron.right")
                         .font(.caption.weight(.semibold))
                         .rotationEffect(.degrees(isExpanded ? 90 : 0))
-                        .frame(width: 16, height: 44)
+                        .frame(width: 16, height: 38)
                         .contentShape(Rectangle())
                 }
                 .buttonStyle(.plain)
                 .foregroundStyle(.secondary)
                 .help(isExpanded ? "Collapse \(group.name)" : "Expand \(group.name)")
                 .accessibilityLabel(isExpanded ? "Collapse \(group.name)" : "Expand \(group.name)")
-                ProcessIcon(name: group.name, path: group.appPath ?? group.primary.executablePath)
+                ProcessIcon(name: group.name, path: group.appPath ?? group.primary.executablePath, size: 26)
                 VStack(alignment: .leading, spacing: 2) {
-                    Text("\(group.name) (\(group.processes.count))").lineLimit(1).truncationMode(.tail)
-                    Text("Application group").font(.caption).foregroundStyle(.secondary).lineLimit(1).truncationMode(.tail)
+                    Text(group.name).lineLimit(1).truncationMode(.tail)
+                    Text("\(group.processes.count) processes")
+                        .font(.caption).foregroundStyle(.secondary).lineLimit(1)
                 }
                 .frame(maxWidth: .infinity, alignment: .leading)
             }
@@ -811,7 +838,7 @@ private struct ProcessGroupRow: View {
         }
         .font(.callout.weight(.medium))
         .padding(.horizontal, 16)
-        .frame(minHeight: 48)
+        .frame(minHeight: 42)
         .background(selected ? Color.accentColor.opacity(0.18) : Color.clear)
         .overlay(alignment: .bottom) { Divider().opacity(0.45) }
         .accessibilityElement(children: .combine)
@@ -931,11 +958,11 @@ private struct HeatCell: View {
             .lineLimit(1)
             .minimumScaleFactor(0.72)
             .truncationMode(.tail)
-            .padding(.vertical, 9)
+            .padding(.vertical, 6)
             .padding(.horizontal, processNumericTextInset)
             .frame(maxWidth: .infinity, alignment: .trailing)
             .clipped()
-            .background(Color.accentColor.opacity(0.05 + min(0.32, max(0, intensity) * 0.32)))
+            .background(Color.accentColor.opacity(min(0.22, max(0, intensity) * 0.22)))
             .clipShape(RoundedRectangle(cornerRadius: 4))
     }
 }
diff --git a/Sources/puter/PuterApp.swift b/Sources/puter/PuterApp.swift
index d0c6dc3..5b13424 100644
--- a/Sources/puter/PuterApp.swift
+++ b/Sources/puter/PuterApp.swift
@@ -19,21 +19,27 @@ final class PuterAppDelegate: NSObject, NSApplicationDelegate, UNUserNotificatio
 struct PuterApp: App {
     @NSApplicationDelegateAdaptor(PuterAppDelegate.self) private var appDelegate
     @State private var monitor = SystemMonitor()
+    @State private var statusBar = StatusBarController()
     @StateObject private var updates = UpdateController()
     @AppStorage("sidebarCompact") private var sidebarCompact = false
     @AppStorage("processPreviewPaneVisible") private var processPreviewPaneVisible = false
     @AppStorage("showMenuBarMonitor") private var showMenuBarMonitor = true
     @AppStorage("menuBarMetric") private var menuBarMetric: MenuBarMetric = .cpu
+    @AppStorage("appAppearance") private var appearance: PuterAppearance = .system
 
     var body: some Scene {
         WindowGroup("puter", id: "main") {
             ContentView()
                 .environment(monitor)
                 .environmentObject(updates)
+                .preferredColorScheme(appearance.colorScheme)
                 .frame(minWidth: 820, minHeight: 560)
                 .task { monitor.start() }
+                .background(StatusBarBridge(controller: statusBar, monitor: monitor, visible: showMenuBarMonitor, value: menuBarValue))
         }
         .defaultSize(width: 1180, height: 760)
+        .windowStyle(.hiddenTitleBar)
+        .windowToolbarStyle(.unified)
         .commands {
             CommandGroup(after: .appInfo) {
                 Button("Check for Updates…") { updates.checkForUpdates() }
@@ -45,8 +51,11 @@ struct PuterApp: App {
                 }
                 .keyboardShortcut("n", modifiers: .command)
             }
-            SidebarCommands()
             CommandMenu("Options") {
+                Button("Show menu-bar monitor") { statusBar.togglePanel() }
+                    .keyboardShortcut("m", modifiers: [.command, .shift])
+                    .disabled(!showMenuBarMonitor)
+                Divider()
                 Button("Refresh now") { monitor.refresh() }
                     .keyboardShortcut("r", modifiers: .command)
                 Divider()
@@ -61,14 +70,6 @@ struct PuterApp: App {
             }
         }
 
-        MenuBarExtra(isInserted: $showMenuBarMonitor) {
-            MenuBarMonitorView()
-                .environment(monitor)
-                .environmentObject(updates)
-        } label: {
-            Label(menuBarValue, systemImage: "gauge.with.dots.needle.50percent")
-        }
-        .menuBarExtraStyle(.window)
     }
 
     private var menuBarValue: String {
@@ -79,6 +80,11 @@ struct PuterApp: App {
         case .power:
             monitor.hardware.battery.systemPowerWatts > 0
                 ? String(format: "%.0f W", monitor.hardware.battery.systemPowerWatts) : "— W"
+        case .batteryPower:
+            monitor.hardware.battery.measuredBatteryWatts.map { String(format: "%.1f W", $0) } ?? "— W"
+        case .chargerInput:
+            monitor.hardware.battery.hasAdapterInput
+                ? String(format: "%.1f W", monitor.hardware.battery.adapterInputWatts) : "— W"
         }
     }
 }
diff --git a/Sources/puter/PuterBrand.swift b/Sources/puter/PuterBrand.swift
new file mode 100644
index 0000000..0e68c28
--- /dev/null
+++ b/Sources/puter/PuterBrand.swift
@@ -0,0 +1,25 @@
+import AppKit
+import SwiftUI
+
+/// A quiet wordmark, not a button: the icon supplies the glass depth.
+struct PuterBrand: View {
+    var body: some View {
+        HStack(spacing: 8) {
+            Image(nsImage: NSApp.applicationIconImage)
+                .resizable()
+                .scaledToFit()
+                .frame(width: 32, height: 32)
+                .accessibilityHidden(true)
+            Text("puter")
+                .font(.system(size: 20, weight: .semibold, design: .rounded))
+                .tracking(-0.4)
+                .foregroundStyle(.primary)
+        }
+        .padding(.horizontal, 16)
+        .frame(height: PuterLayout.toolbarControlHeight)
+        .fixedSize()
+        .accessibilityElement(children: .ignore)
+        .accessibilityLabel("puter")
+        .accessibilityAddTraits(.isHeader)
+    }
+}
diff --git a/Sources/puter/PuterStyle.swift b/Sources/puter/PuterStyle.swift
new file mode 100644
index 0000000..352d10b
--- /dev/null
+++ b/Sources/puter/PuterStyle.swift
@@ -0,0 +1,78 @@
+import SwiftUI
+
+/// Shared geometry for the window shell and data pages. Colors and controls
+/// follow the system appearance, including accessibility contrast settings.
+enum PuterLayout {
+    static let pageInset: CGFloat = 20
+    static let sectionSpacing: CGFloat = 16
+    static let controlSpacing: CGFloat = 8
+    static let compactSidebarWidth: CGFloat = 84
+    static let expandedSidebarWidth: CGFloat = 210
+    static let sidebarRowHeight: CGFloat = 28
+    static let toolbarControlHeight: CGFloat = 36
+}
+
+enum PuterAppearance: String, CaseIterable, Identifiable {
+    case system = "System"
+    case light = "Light"
+    case dark = "Dark"
+
+    var id: String { rawValue }
+
+    var colorScheme: ColorScheme? {
+        switch self {
+        case .system: nil
+        case .light: .light
+        case .dark: .dark
+        }
+    }
+}
+
+/// A single navigation surface; data views deliberately do not use glass.
+struct NavigationGlass: ViewModifier {
+    @Environment(\.accessibilityReduceTransparency) private var reduceTransparency
+
+    @ViewBuilder func body(content: Content) -> some View {
+        if reduceTransparency {
+            content.background(.background, in: .rect(cornerRadius: 16))
+        } else if #available(macOS 26, *) {
+            content.glassEffect(.regular, in: .rect(cornerRadius: 16))
+        } else {
+            content.background(.regularMaterial, in: .rect(cornerRadius: 16))
+        }
+    }
+}
+
+struct GlassActions<Content: View>: View {
+    @ViewBuilder var content: () -> Content
+
+    var body: some View {
+        if #available(macOS 26, *) {
+            GlassEffectContainer(spacing: 8) {
+                content()
+                    .buttonStyle(.glass)
+                    .buttonBorderShape(.capsule)
+                    .controlSize(.large)
+                    .menuStyle(.button)
+            }
+        } else {
+            content().buttonStyle(.bordered)
+        }
+    }
+}
+
+/// Preserve native menu semantics without the legacy pop-up button bezel.
+struct GlassMenuSurface: ViewModifier {
+    @ViewBuilder func body(content: Content) -> some View {
+        if #available(macOS 26, *) {
+            content
+                .menuStyle(.borderlessButton)
+                .fixedSize()
+                .padding(.horizontal, 12)
+                .frame(minHeight: 32)
+                .glassEffect(.regular.interactive(), in: .capsule)
+        } else {
+            content.menuStyle(.button)
+        }
+    }
+}
diff --git a/Sources/puter/SamplingDemand.swift b/Sources/puter/SamplingDemand.swift
new file mode 100644
index 0000000..766023a
--- /dev/null
+++ b/Sources/puter/SamplingDemand.swift
@@ -0,0 +1,31 @@
+import Foundation
+
+/// Only counters with a live consumer need periodic samples. Inventory changes
+/// continue to arrive through workspace and power-source notifications.
+struct SamplingDemand: Equatable {
+    let processInventory: Bool
+    let hardware: Bool
+    let services: Bool
+    let telemetry: Bool
+    let interval: Duration?
+
+    init(active: Bool, section: TaskSection, speed: UpdateSpeed,
+         recording: Bool, alerts: Bool, menuBar: Bool, powerMenu: Bool, menuPresented: Bool = false) {
+        processInventory = recording || (active && section.usesLiveProcessInventory)
+        hardware = recording || menuPresented || (menuBar && powerMenu)
+            || (active && [.hardware, .performance, .energy].contains(section))
+        services = active && section == .services
+        telemetry = processInventory || alerts || menuPresented || (menuBar && !powerMenu)
+        if speed == .paused || !(telemetry || hardware || services) {
+            interval = nil
+        } else if recording || (active && section.usesLiveProcessInventory) {
+            interval = speed.interval
+        } else if services {
+            interval = .seconds(3)
+        } else if active || alerts || hardware {
+            interval = .seconds(5)
+        } else {
+            interval = .seconds(10)
+        }
+    }
+}
diff --git a/Sources/puter/SearchGlassSurface.swift b/Sources/puter/SearchGlassSurface.swift
new file mode 100644
index 0000000..e325c0a
--- /dev/null
+++ b/Sources/puter/SearchGlassSurface.swift
@@ -0,0 +1,17 @@
+import SwiftUI
+
+struct SearchGlassSurface: ViewModifier {
+    @Environment(\.accessibilityReduceTransparency) private var reduceTransparency
+
+    @ViewBuilder func body(content: Content) -> some View {
+        if reduceTransparency {
+            content.background(.background, in: .capsule)
+                .overlay { Capsule().strokeBorder(.secondary.opacity(0.3)) }
+        } else if #available(macOS 26, *) {
+            content.glassEffect(.regular.interactive(), in: .capsule)
+        } else {
+            content.background(.regularMaterial, in: .capsule)
+                .overlay { Capsule().strokeBorder(.secondary.opacity(0.2)) }
+        }
+    }
+}
diff --git a/Sources/puter/SecondaryViews.swift b/Sources/puter/SecondaryViews.swift
index c0862ea..1a09990 100644
--- a/Sources/puter/SecondaryViews.swift
+++ b/Sources/puter/SecondaryViews.swift
@@ -835,7 +835,8 @@ private enum DetailColumn: String, CaseIterable, Identifiable {
         switch self {
         case .name: 260
         case .user: 140
-        case .architecture, .state: 105
+        case .architecture: 125
+        case .state: 105
         case .cpuTime, .memory, .disk, .network, .elapsed: 112
         case .parentPID: 92
         default: 78
@@ -846,6 +847,7 @@ private enum DetailColumn: String, CaseIterable, Identifiable {
         case .name: 170
         case .user: 90
         case .cpuTime, .memory, .disk, .network, .elapsed: 82
+        case .architecture: 110
         default: 62
         }
     }
@@ -888,12 +890,16 @@ struct DetailsView: View {
                     } label: {
                         Label(previewPaneVisible ? "Hide preview" : "Show preview", systemImage: "sidebar.right")
                     }
-                    .buttonStyle(.bordered)
                     Button("Properties", systemImage: "info.circle") {
                         inspectedProcess = selectedProcess
                     }
                     .disabled(selectedProcess == nil)
                     Menu("Columns", systemImage: "rectangle.split.3x1") {
+                        Button("Show essential columns") {
+                            visibleColumnStorage = [DetailColumn.name, .pid, .user, .cpu, .memory]
+                                .map(\.rawValue).joined(separator: ",")
+                        }
+                        Divider()
                         ForEach(DetailColumn.allCases) { column in
                             Toggle(column.title, isOn: columnBinding(column))
                                 .disabled(column == .name || column == .pid)
@@ -905,6 +911,8 @@ struct DetailsView: View {
                             persistColumnWidths()
                         }
                     }
+                    .modifier(GlassMenuSurface())
+                    .fixedSize()
                 }
             }
             ResourceSummaryBar(snapshot: monitor.snapshot)
@@ -942,6 +950,11 @@ struct DetailsView: View {
                 }
                 .frame(width: max(tableWidth, proxy.size.width), alignment: .leading)
             }
+            .overlay {
+                if filtered.isEmpty {
+                    ProcessInventoryPlaceholder(isLoading: monitor.lastUpdated == nil, searchText: searchText)
+                }
+            }
         }
         .frame(maxWidth: .infinity, maxHeight: .infinity)
     }
@@ -964,7 +977,7 @@ struct DetailsView: View {
             }
         }
         .frame(maxWidth: .infinity, alignment: .leading)
-        .font(.caption.weight(.medium))
+        .font(.callout)
         .foregroundStyle(.secondary)
         .background(.regularMaterial)
         .overlay(alignment: .bottom) { Divider() }
@@ -986,11 +999,6 @@ struct DetailsView: View {
         .background(rowBackground(process: process, index: index))
         .contentShape(Rectangle())
         .onTapGesture { selection = process.pid }
-        .focusable()
-        .onKeyPress(.return) {
-            selection = process.pid
-            return .handled
-        }
         .accessibilityElement(children: .combine)
         .accessibilityLabel("\(process.displayName), PID \(process.pid), \(process.user), \(readableState(process.state))")
         .accessibilityValue("CPU \(Formatters.percent(process.cpu)), memory \(Formatters.bytes.string(fromByteCount: Int64(process.residentBytes))), \(process.threadCount) threads")
@@ -1011,10 +1019,17 @@ struct DetailsView: View {
     private func detailCell(_ process: ProcessRecord, column: DetailColumn) -> some View {
         switch column {
         case .name:
-            HStack(spacing: 8) {
-                ProcessIcon(name: process.displayName, path: process.executablePath)
-                Text(process.displayName).lineLimit(1).truncationMode(.tail)
+            Button {
+                selection = process.pid
+            } label: {
+                HStack(spacing: 8) {
+                    ProcessIcon(name: process.displayName, path: process.executablePath)
+                    Text(process.displayName).lineLimit(1).truncationMode(.tail)
+                }
+                .frame(maxWidth: .infinity, alignment: .leading)
+                .contentShape(Rectangle())
             }
+            .buttonStyle(.plain)
         case .pid: Text("\(process.pid)").monospacedDigit()
         case .parentPID: Text("\(process.parentPID)").monospacedDigit()
         case .user: Text(process.user).lineLimit(1)
@@ -1076,25 +1091,38 @@ struct DetailsView: View {
             Divider()
             HStack(spacing: 10) {
                 if let process = selectedProcess {
-                    ProcessIcon(name: process.displayName, path: process.executablePath)
-                    Text(process.displayName).font(.callout.weight(.semibold)).lineLimit(1)
-                    Text("PID \(process.pid)").foregroundStyle(.secondary).monospacedDigit()
-                    Text("•").foregroundStyle(.tertiary)
-                    Text(Formatters.percent(process.cpu) + " CPU").monospacedDigit()
-                    Text("•").foregroundStyle(.tertiary)
-                    Text(Formatters.bytes.string(fromByteCount: Int64(process.residentBytes))).monospacedDigit()
-                    Spacer()
+                    ProcessIcon(name: process.displayName, path: process.executablePath, size: 24)
+                    VStack(alignment: .leading, spacing: 2) {
+                        Text(process.displayName).font(.callout.weight(.semibold)).lineLimit(1)
+                        ViewThatFits(in: .horizontal) {
+                            HStack(spacing: 10) {
+                                Text("PID \(process.pid)")
+                                Text("CPU \(Formatters.percent(process.cpu))")
+                                Text("Memory \(Formatters.bytes.string(fromByteCount: Int64(process.residentBytes)))")
+                            }
+                            .fixedSize(horizontal: true, vertical: false)
+                            Text("PID \(process.pid)").fixedSize(horizontal: true, vertical: false)
+                        }
+                        .font(.caption)
+                        .foregroundStyle(.secondary)
+                        .monospacedDigit()
+                    }
+                    .frame(maxWidth: .infinity, alignment: .leading)
                     Button("End task") { terminationRequest = .init(process: process, kind: .normal) }
-                    Button("Properties") { inspectedProcess = process }.buttonStyle(.borderedProminent)
+                        .controlSize(.small)
+                    Button("Properties") { inspectedProcess = process }
+                        .buttonStyle(.borderedProminent)
+                        .controlSize(.small)
                 } else {
                     Text("\(filtered.count) processes").foregroundStyle(.secondary)
                     Spacer()
-                    Text("Select a process for actions and live details").foregroundStyle(.tertiary)
+                    Text("Select a process to inspect it").foregroundStyle(.tertiary)
+                        .lineLimit(1)
                 }
             }
-            .font(.caption)
+            .font(.callout)
             .padding(.horizontal, 14)
-            .frame(minHeight: 48)
+            .frame(minHeight: 52)
         }
         .background(.bar)
     }
diff --git a/Sources/puter/StatusBarBridge.swift b/Sources/puter/StatusBarBridge.swift
new file mode 100644
index 0000000..b3decc8
--- /dev/null
+++ b/Sources/puter/StatusBarBridge.swift
@@ -0,0 +1,14 @@
+import SwiftUI
+
+struct StatusBarBridge: NSViewRepresentable {
+    @Environment(\.openWindow) private var openWindow
+    let controller: StatusBarController
+    let monitor: SystemMonitor
+    let visible: Bool
+    let value: String
+
+    func makeNSView(context: Context) -> NSView { NSView() }
+    func updateNSView(_ view: NSView, context: Context) {
+        controller.configure(monitor: monitor, visible: visible, value: value) { openWindow(id: "main") }
+    }
+}
diff --git a/Sources/puter/StatusBarController.swift b/Sources/puter/StatusBarController.swift
new file mode 100644
index 0000000..9ea763a
--- /dev/null
+++ b/Sources/puter/StatusBarController.swift
@@ -0,0 +1,150 @@
+import AppKit
+import SwiftUI
+import Observation
+
+/// AppKit owns status-item click semantics and popover lifetime; SwiftUI owns content.
+@MainActor
+final class StatusBarController: NSObject, NSPopoverDelegate {
+    private var item: NSStatusItem?
+    private let popover = NSPopover()
+    private weak var monitor: SystemMonitor?
+    private var openMain: (() -> Void)?
+    private var observing = false
+
+    func configure(monitor: SystemMonitor, visible: Bool, value: String, openMain: @escaping () -> Void) {
+        self.monitor = monitor
+        self.openMain = openMain
+        if !observing {
+            observing = true
+            NotificationCenter.default.addObserver(self, selector: #selector(preferencesChanged), name: UserDefaults.didChangeNotification, object: nil)
+            NotificationCenter.default.addObserver(self, selector: #selector(menuTrackingBegan), name: NSMenu.didBeginTrackingNotification, object: nil)
+            NotificationCenter.default.addObserver(self, selector: #selector(menuTrackingEnded), name: NSMenu.didEndTrackingNotification, object: nil)
+            observeReadings()
+        }
+        guard visible else {
+            popover.performClose(nil)
+            if let item { NSStatusBar.system.removeStatusItem(item) }
+            item = nil
+            return
+        }
+        if item == nil {
+            let status = NSStatusBar.system.statusItem(withLength: NSStatusItem.variableLength)
+            status.autosaveName = "puter.monitor"
+            status.button?.target = self
+            status.button?.action = #selector(clicked)
+            status.button?.sendAction(on: [.leftMouseUp, .rightMouseUp])
+            status.button?.image = NSImage(systemSymbolName: "gauge.with.dots.needle.50percent", accessibilityDescription: "puter")
+            status.button?.imagePosition = .imageLeading
+            item = status
+            popover.behavior = .transient
+            popover.animates = false
+            popover.delegate = self
+            popover.contentViewController = NSHostingController(rootView:
+                MenuBarMonitorView(openMain: { [weak self] in self?.openMainWindow() }).environment(monitor))
+        }
+        if item?.button?.title != value { item?.button?.title = value }
+        item?.button?.toolTip = "puter · click for readings, right-click for options"
+        item?.button?.setAccessibilityLabel("puter monitor, \(value)")
+    }
+
+    @objc private func clicked() {
+        if NSApp.currentEvent?.type == .rightMouseUp { showOptions() }
+        else { togglePanel() }
+    }
+
+    func togglePanel() {
+        guard let button = item?.button else { return }
+        if popover.isShown { popover.performClose(nil) }
+        else {
+            popover.show(relativeTo: button.bounds, of: button, preferredEdge: .minY)
+            popover.contentViewController?.view.window?.makeKey()
+        }
+    }
+
+    private func showOptions() {
+        guard let item, let button = item.button, let monitor else { return }
+        popover.performClose(nil)
+        let menu = NSMenu()
+        let metrics = NSMenu()
+        for metric in MenuBarMetric.allCases {
+            let entry = NSMenuItem(title: metric.rawValue, action: #selector(selectMetric(_:)), keyEquivalent: "")
+            entry.target = self
+            entry.representedObject = metric.rawValue
+            entry.state = UserDefaults.standard.string(forKey: "menuBarMetric") == metric.rawValue
+                || (UserDefaults.standard.string(forKey: "menuBarMetric") == nil && metric == .cpu) ? .on : .off
+            metrics.addItem(entry)
+        }
+        let metricRoot = menu.addItem(withTitle: "Menu bar reading", action: nil, keyEquivalent: "")
+        metricRoot.submenu = metrics
+        let speeds = NSMenu()
+        for speed in UpdateSpeed.allCases {
+            let entry = NSMenuItem(title: speed.rawValue, action: #selector(selectSpeed(_:)), keyEquivalent: "")
+            entry.target = self
+            entry.representedObject = speed.rawValue
+            entry.state = monitor.updateSpeed == speed ? .on : .off
+            speeds.addItem(entry)
+        }
+        menu.addItem(withTitle: "Update speed", action: nil, keyEquivalent: "").submenu = speeds
+        menu.addItem(.separator())
+        let open = menu.addItem(withTitle: "Open puter", action: #selector(openMainWindow), keyEquivalent: "")
+        open.target = self
+        item.menu = menu
+        button.performClick(nil)
+        item.menu = nil
+    }
+
+    @objc private func selectMetric(_ sender: NSMenuItem) {
+        guard let raw = sender.representedObject as? String else { return }
+        UserDefaults.standard.set(raw, forKey: "menuBarMetric")
+    }
+    @objc private func selectSpeed(_ sender: NSMenuItem) {
+        guard let raw = sender.representedObject as? String, let speed = UpdateSpeed(rawValue: raw) else { return }
+        monitor?.updateSpeed = speed
+    }
+    @objc private func openMainWindow() {
+        popover.performClose(nil)
+        openMain?()
+        NSApp.activate()
+    }
+    func popoverDidShow(_ notification: Notification) { monitor?.menuBarPresented = true }
+    func popoverDidClose(_ notification: Notification) { monitor?.menuBarPresented = false }
+
+    @objc private func menuTrackingBegan() {
+        // Native submenus extend outside the panel; don't dismiss their parent.
+        if popover.isShown { popover.behavior = .applicationDefined }
+    }
+    @objc private func menuTrackingEnded() {
+        popover.behavior = .transient
+    }
+
+    @objc private func preferencesChanged() {
+        guard let monitor, let openMain else { return }
+        configure(monitor: monitor,
+                  visible: UserDefaults.standard.object(forKey: "showMenuBarMonitor") as? Bool ?? true,
+                  value: reading(monitor), openMain: openMain)
+    }
+
+    private func reading(_ monitor: SystemMonitor) -> String {
+        switch MenuBarMetric(rawValue: UserDefaults.standard.string(forKey: "menuBarMetric") ?? "") ?? .cpu {
+        case .cpu: return Formatters.percent(monitor.snapshot.cpuPercent)
+        case .memory: return Formatters.percent(monitor.snapshot.memoryPercent)
+        case .network: return Formatters.rate(monitor.snapshot.networkReceiveRate + monitor.snapshot.networkSendRate)
+        case .power: return monitor.hardware.battery.hasSystemPower ? String(format: "%.0f W", monitor.hardware.battery.systemPowerWatts) : "— W"
+        case .batteryPower: return monitor.hardware.battery.measuredBatteryWatts.map { String(format: "%.1f W", $0) } ?? "— W"
+        case .chargerInput: return monitor.hardware.battery.hasAdapterInput ? String(format: "%.1f W", monitor.hardware.battery.adapterInputWatts) : "— W"
+        }
+    }
+
+    private func observeReadings() {
+        guard let monitor else { return }
+        withObservationTracking {
+            // Track both sources, even when the selected metric changes with no main window.
+            _ = monitor.snapshot
+            _ = monitor.hardware
+            let value = reading(monitor)
+            if item?.button?.title != value { item?.button?.title = value }
+        } onChange: { [weak self] in
+            Task { @MainActor in self?.observeReadings() }
+        }
+    }
+}
diff --git a/Sources/puter/SystemMonitor.swift b/Sources/puter/SystemMonitor.swift
index 129bf07..534c257 100644
--- a/Sources/puter/SystemMonitor.swift
+++ b/Sources/puter/SystemMonitor.swift
@@ -9,6 +9,7 @@ import UserNotifications
 @Observable
 final class SystemMonitor {
     var processes: [ProcessRecord] = []
+    var processGroups: [ProcessGroup] = []
     var services: [ServiceRecord] = []
     var appHistory: [AppUsageRecord] = []
     var appHistoryStartDate = Date()
@@ -29,18 +30,34 @@ final class SystemMonitor {
     var hardware = HardwareSnapshot()
     var systemPowerHistory: [MetricSample] = []
     var updateSpeed: UpdateSpeed {
-        didSet { UserDefaults.standard.set(updateSpeed.rawValue, forKey: "updateSpeed") }
+        didSet {
+            UserDefaults.standard.set(updateSpeed.rawValue, forKey: "updateSpeed")
+            rescheduleSampling()
+        }
     }
     var lastUpdated: Date?
     var errorMessage: String?
-    var isRecording = false
+    var isRecording = false { didSet { rescheduleSampling() } }
+    var menuBarPresented = false {
+        didSet {
+            guard menuBarPresented != oldValue else { return }
+            rescheduleSampling()
+            if menuBarPresented && !isPaused {
+                requestTelemetryRefresh()
+                requestHardwareRefresh(forcePowerRefresh: true)
+            }
+        }
+    }
     var recordingStartDate: Date?
     var recordingSamples: [TelemetryRecordingSample] = []
     var recentAlerts: [ResourceAlertEvent] = []
 
     private var updateTask: Task<Void, Never>?
-    private var hardwareUpdateTask: Task<Void, Never>?
-    private var serviceUpdateTask: Task<Void, Never>?
+    private var started = false
+    private var scheduledDemand: SamplingDemand?
+    private var processEventTask: Task<Void, Never>?
+    private var lastHardwareRequest = Date.distantPast
+    private var lastServiceRequest = Date.distantPast
     private var telemetryRefreshTask: Task<Void, Never>?
     private var hardwareRefreshTask: Task<Void, Never>?
     private var serviceRefreshTask: Task<Void, Never>?
@@ -55,7 +72,14 @@ final class SystemMonitor {
     private var serviceRefreshPending = false
     private var eventObservers: [NSObjectProtocol] = []
     private var activeSection: TaskSection = .processes
-    private var appIsActive = true
+    private var appIsActive: Bool {
+        let app = NSRunningApplication.current
+        return !app.isHidden && NSApp.windows.contains {
+            !($0 is NSPanel) && $0.styleMask.contains(.titled) && $0.isVisible && !$0.isMiniaturized
+                && $0.occlusionState.contains(.visible)
+        }
+    }
+    private var lastDiskCapacitySample: Date?
     private var memoryPressureLevel = MemoryPressureLevel.normal
     private var lastProcessDiagnosticsSample: Date?
     private var lastProcessInventorySample: Date?
@@ -97,38 +121,55 @@ final class SystemMonitor {
     }
 
     func start() {
-        guard updateTask == nil else { return }
-        appIsActive = NSApp.isActive
+        guard !started else { return }
+        started = true
         installEventObservers()
         installMemoryPressureSource()
         installPowerSourceObserver()
-        refresh()
+        requestTelemetryRefresh(forceInventory: true)
+        if samplingDemand.hardware { requestHardwareRefresh() }
+        if samplingDemand.services { requestServiceRefresh() }
+        rescheduleSampling()
+    }
+
+    private var samplingDemand: SamplingDemand {
+        let defaults = UserDefaults.standard
+        return SamplingDemand(active: appIsActive, section: activeSection, speed: updateSpeed,
+                              recording: isRecording, alerts: defaults.bool(forKey: "resourceAlertsEnabled"),
+                              menuBar: defaults.object(forKey: "showMenuBarMonitor") as? Bool ?? true,
+                              powerMenu: MenuBarMetric(rawValue: defaults.string(forKey: "menuBarMetric") ?? "")?.requiresPower ?? false,
+                              menuPresented: menuBarPresented)
+    }
+
+    private func rescheduleSampling() {
+        guard started else { return }
+        let demand = samplingDemand
+        guard demand != scheduledDemand else { return }
+        scheduledDemand = demand
+        updateTask?.cancel()
+        updateTask = nil
+        guard let interval = demand.interval else { return }
         updateTask = Task { [weak self] in
             while !Task.isCancelled {
-                let interval = self?.telemetryInterval ?? .seconds(2)
-                try? await Task.sleep(for: interval)
-                guard let self, !self.isPaused else { continue }
-                self.requestTelemetryRefresh()
-            }
-        }
-        hardwareUpdateTask = Task { [weak self] in
-            while !Task.isCancelled {
-                guard let self else { return }
-                let seconds = self.appIsActive
-                    ? ([.hardware, .performance, .energy].contains(self.activeSection) ? 5 : 30)
-                    : 60
-                try? await Task.sleep(for: .seconds(seconds))
-                guard !Task.isCancelled, !self.isPaused else { continue }
-                self.requestHardwareRefresh()
-            }
-        }
-        serviceUpdateTask = Task { [weak self] in
-            while !Task.isCancelled {
-                guard let self else { return }
-                let seconds = self.appIsActive ? (self.activeSection == .services ? 3 : 30) : 60
-                try? await Task.sleep(for: .seconds(seconds))
-                guard !Task.isCancelled, !self.isPaused else { continue }
-                self.requestServiceRefresh()
+                do { try await Task.sleep(for: interval, tolerance: .milliseconds(250)) }
+                catch { return }
+                guard !Task.isCancelled, let self else { return }
+                // Reconcile with live AppKit state before executing captured demand.
+                // Notifications can coalesce while the app is being hidden.
+                guard self.samplingDemand == demand else {
+                    self.rescheduleSampling()
+                    return
+                }
+                let now = Date()
+                if demand.telemetry { self.requestTelemetryRefresh() }
+                if demand.hardware && now.timeIntervalSince(self.lastHardwareRequest) >= 5 {
+                    self.lastHardwareRequest = now
+                    self.requestHardwareRefresh()
+                }
+                if demand.services && now.timeIntervalSince(self.lastServiceRequest) >= 3 {
+                    self.lastServiceRequest = now
+                    self.requestServiceRefresh()
+                }
             }
         }
     }
@@ -136,7 +177,8 @@ final class SystemMonitor {
     func refresh() {
         processInventoryRefreshRequested = true
         volumeInventoryRefreshRequested = true
-        requestTelemetryRefresh()
+        lastDiskCapacitySample = nil
+        requestTelemetryRefresh(forceInventory: true)
         requestHardwareRefresh(
             forcePortRefresh: true,
             forcePowerRefresh: true,
@@ -149,26 +191,18 @@ final class SystemMonitor {
     func setActiveSection(_ section: TaskSection) {
         guard activeSection != section else { return }
         activeSection = section
+        rescheduleSampling()
+        guard !isPaused else { return }
+        if section == .performance { volumeInventoryRefreshRequested = true }
         if section.usesLiveProcessInventory {
             processInventoryRefreshRequested = true
             requestTelemetryRefresh()
         }
-        if section == .performance { volumeInventoryRefreshRequested = true }
         if section == .hardware || section == .performance || section == .energy { requestHardwareRefresh() }
         if section == .services { requestServiceRefresh() }
     }
 
-    private var telemetryInterval: Duration {
-        guard appIsActive else { return .seconds(10) }
-        switch activeSection {
-        case .processes, .performance, .history, .users, .details, .energy:
-            return updateSpeed.interval
-        case .startup, .services, .hardware, .diagnostics, .settings:
-            return .seconds(5)
-        }
-    }
-
-    private func requestTelemetryRefresh() {
+    private func requestTelemetryRefresh(forceInventory: Bool = false) {
         guard telemetryRefreshTask == nil else {
             telemetryRefreshPending = true
             return
@@ -177,28 +211,33 @@ final class SystemMonitor {
         let processInventoryInterval: TimeInterval = activeSection.usesLiveProcessInventory
             ? 0
             : (appIsActive ? 15 : 30)
-        let includeProcessInventory = processInventoryRefreshRequested
+        let includeProcessInventory = forceInventory || (samplingDemand.processInventory && (processInventoryRefreshRequested
             || processes.isEmpty
-            || lastProcessInventorySample.map { now.timeIntervalSince($0) >= processInventoryInterval } ?? true
+            || lastProcessInventorySample.map { now.timeIntervalSince($0) >= processInventoryInterval } ?? true))
         if includeProcessInventory { processInventoryRefreshRequested = false }
         let diagnosticInterval: TimeInterval = activeSection == .details ? 5 : 15
-        let includeDiagnostics = includeProcessInventory && (lastProcessDiagnosticsSample.map {
+        let includeDiagnostics = includeProcessInventory && activeSection == .details && (lastProcessDiagnosticsSample.map {
             now.timeIntervalSince($0) >= diagnosticInterval
         } ?? true)
         let deviceMetricsInterval: TimeInterval = activeSection == .performance ? 3 : 20
-        let includeDeviceMetrics = lastDeviceMetricsSample.map {
+        let deviceMetricsNeeded = isRecording || UserDefaults.standard.bool(forKey: "resourceAlertsEnabled")
+            || (appIsActive && activeSection.usesLiveProcessInventory)
+        let includeDeviceMetrics = deviceMetricsNeeded && (lastDeviceMetricsSample.map {
             Date().timeIntervalSince($0) >= deviceMetricsInterval
-        } ?? true
+        } ?? true)
         let includeProcessIO: Bool
         switch activeSection {
         case .processes, .performance, .history, .users, .details, .energy, .diagnostics:
-            includeProcessIO = includeProcessInventory && appIsActive
+            includeProcessIO = includeProcessInventory && (appIsActive || isRecording)
         case .startup, .services, .hardware, .settings:
             includeProcessIO = false
         }
-        let includeVolumeInventory = volumeInventoryRefreshRequested
-            || (activeSection == .performance && (lastVolumeInventorySample.map { Date().timeIntervalSince($0) >= 10 } ?? true))
+        let includeVolumeInventory = volumeInventoryRefreshRequested && appIsActive && activeSection == .performance
         if includeVolumeInventory { volumeInventoryRefreshRequested = false }
+        let includeDiskCapacity = lastDiskCapacitySample == nil || includeVolumeInventory
+            || (appIsActive && activeSection == .performance
+                && now.timeIntervalSince(lastDiskCapacitySample!) >= 60)
+        let cachedDiskCapacity = (free: snapshot.diskFree, total: snapshot.diskTotal)
         let knownProcesses = includeProcessInventory
             ? Dictionary(uniqueKeysWithValues: processes.map { ($0.pid, $0) })
             : [:]
@@ -210,15 +249,17 @@ final class SystemMonitor {
                     includeDeviceMetrics: includeDeviceMetrics,
                     includeProcessIO: includeProcessIO,
                     includeVolumeInventory: includeVolumeInventory,
+                    cachedDiskCapacity: includeDiskCapacity ? nil : cachedDiskCapacity,
                     knownProcesses: knownProcesses
                 )
             }.value
             guard let self, !Task.isCancelled else { return }
             self.applyTelemetry(result)
+            if includeDiskCapacity { self.lastDiskCapacitySample = now }
             self.telemetryRefreshTask = nil
             if self.telemetryRefreshPending {
                 self.telemetryRefreshPending = false
-                self.requestTelemetryRefresh()
+                if !self.isPaused && self.samplingDemand.telemetry { self.requestTelemetryRefresh() }
             }
         }
     }
@@ -238,15 +279,16 @@ final class SystemMonitor {
             return
         }
         let now = Date()
-        let refreshPorts = forcePortRefresh || lastPortSample.map { Date().timeIntervalSince($0) >= 60 } ?? true
-        let powerIsVisible = [.hardware, .performance, .energy].contains(activeSection)
-            || UserDefaults.standard.string(forKey: "menuBarMetric") == MenuBarMetric.power.rawValue
+        let detailedHardware = appIsActive && [.hardware, .performance, .energy].contains(activeSection)
+        let refreshPorts = forcePortRefresh || (detailedHardware && (lastPortSample.map { now.timeIntervalSince($0) >= 60 } ?? true))
+        let powerIsVisible = menuBarPresented || detailedHardware
+            || (MenuBarMetric(rawValue: UserDefaults.standard.string(forKey: "menuBarMetric") ?? "")?.requiresPower ?? false)
         let powerInterval: TimeInterval = powerIsVisible ? 5 : 30
         let refreshPower = forcePowerRefresh || lastPowerSensorSample.map { now.timeIntervalSince($0) >= powerInterval } ?? true
         let fanInterval: TimeInterval = activeSection == .hardware ? 5 : 30
-        let refreshFans = forceFanRefresh || lastFanSample.map { now.timeIntervalSince($0) >= fanInterval } ?? true
+        let refreshFans = forceFanRefresh || ((detailedHardware || isRecording) && (lastFanSample.map { now.timeIntervalSince($0) >= fanInterval } ?? true))
         let slowInterval: TimeInterval = [.hardware, .energy].contains(activeSection) ? 15 : 60
-        let refreshSlow = forceSlowRefresh || lastSlowHardwareSample.map { now.timeIntervalSince($0) >= slowInterval } ?? true
+        let refreshSlow = forceSlowRefresh || (detailedHardware && (lastSlowHardwareSample.map { now.timeIntervalSince($0) >= slowInterval } ?? true))
         let existingHardware = hardware
         hardwareRefreshTask = Task { [weak self] in
             let result = await Task.detached(priority: .utility) {
@@ -323,6 +365,7 @@ final class SystemMonitor {
             let activePIDs = Set(currentProcesses.map(\.pid))
             processDiagnostics = processDiagnostics.filter { activePIDs.contains($0.key) }
             processes = currentProcesses
+            processGroups = ProcessGrouping.groups(from: currentProcesses, searchText: "")
             updateCPUHistory(with: currentProcesses)
             updateProcessDiskActivity(result.processIO, current: currentProcesses)
             lastProcessInventorySample = Date()
@@ -437,7 +480,16 @@ final class SystemMonitor {
             eventObservers.append(center.addObserver(forName: name, object: nil, queue: .main) { [weak self] _ in
                 Task { @MainActor in
                     self?.processInventoryRefreshRequested = true
-                    self?.requestTelemetryRefresh()
+                    if self?.samplingDemand.processInventory == true, self?.isPaused == false {
+                        self?.processEventTask?.cancel()
+                        self?.processEventTask = Task { [weak self] in
+                            do { try await Task.sleep(for: .milliseconds(200)) }
+                            catch { return }
+                            guard let self, !self.isPaused, self.samplingDemand.processInventory else { return }
+                            self.requestTelemetryRefresh()
+                            self.processEventTask = nil
+                        }
+                    }
                 }
             })
         }
@@ -470,8 +522,8 @@ final class SystemMonitor {
             queue: .main
         ) { [weak self] _ in
             Task { @MainActor in
-                self?.appIsActive = true
-                self?.requestTelemetryRefresh()
+                self?.rescheduleSampling()
+                if self?.isPaused == false { self?.requestTelemetryRefresh() }
             }
         })
         eventObservers.append(NotificationCenter.default.addObserver(
@@ -479,7 +531,24 @@ final class SystemMonitor {
             object: nil,
             queue: .main
         ) { [weak self] _ in
-            Task { @MainActor in self?.appIsActive = false }
+            Task { @MainActor in
+                self?.rescheduleSampling()
+            }
+        })
+        for notification in [NSApplication.didHideNotification, NSApplication.didUnhideNotification,
+                             NSWindow.didChangeOcclusionStateNotification,
+                             NSWindow.didMiniaturizeNotification, NSWindow.didDeminiaturizeNotification,
+                             NSWindow.willCloseNotification] {
+            eventObservers.append(NotificationCenter.default.addObserver(
+                forName: notification, object: nil, queue: .main
+            ) { [weak self] _ in
+                Task { @MainActor in self?.rescheduleSampling() }
+            })
+        }
+        eventObservers.append(NotificationCenter.default.addObserver(
+            forName: UserDefaults.didChangeNotification, object: nil, queue: .main
+        ) { [weak self] _ in
+            Task { @MainActor in self?.rescheduleSampling() }
         })
         eventObservers.append(NotificationCenter.default.addObserver(
             forName: NSApplication.willTerminateNotification,
@@ -750,7 +819,7 @@ final class SystemMonitor {
     }
 
     private func sampleAppNetworkIfNeeded() {
-        guard appNetworkTask == nil,
+        guard samplingDemand.processInventory, !isPaused, appNetworkTask == nil,
               lastAppNetworkSample.map({ Date().timeIntervalSince($0) >= 10 }) ?? true else { return }
         lastAppNetworkSample = Date()
         appNetworkTask = Task { [weak self] in
@@ -1171,6 +1240,7 @@ private enum ProcessScanner {
         includeDeviceMetrics: Bool,
         includeProcessIO: Bool,
         includeVolumeInventory: Bool,
+        cachedDiskCapacity: (free: UInt64, total: UInt64)? = nil,
         knownProcesses: [Int32: ProcessRecord] = [:]
     ) -> TelemetryResult {
         let records = includeProcessInventory
@@ -1178,7 +1248,7 @@ private enum ProcessScanner {
             : []
         let totalMemory = ProcessInfo.processInfo.physicalMemory
         let memory = memoryCounters(total: totalMemory)
-        let disk = diskUsage()
+        let disk = cachedDiskCapacity ?? diskUsage()
         var snapshot = SystemSnapshot()
         snapshot.cpuPercent = 0
         snapshot.memoryUsed = memory.used
@@ -1683,16 +1753,23 @@ private enum HardwareScanner {
         refreshFans: Bool,
         refreshSlowDiagnostics: Bool
     ) -> HardwareSnapshot {
-        var battery = batterySnapshot()
+        var battery = BatteryRegistryReader.read()
         if refreshPowerSensors {
             let power = powerSensorSnapshot()
-            if power.systemWatts > 0 { battery.systemPowerWatts = power.systemWatts }
+            if !battery.hasSystemPower, power.systemWatts > 0 {
+                battery.systemPowerWatts = power.systemWatts
+                battery.hasSystemPower = true
+            }
             battery.sensorBatteryPowerWatts = power.batteryWatts
-            battery.adapterInputWatts = power.adapterWatts
+            if battery.externalPowerConnected, !battery.hasAdapterInput, power.adapterWatts > 0 {
+                battery.adapterInputWatts = power.adapterWatts
+                battery.hasAdapterInput = true
+            }
         } else {
-            battery.systemPowerWatts = existing.battery.systemPowerWatts
-            battery.sensorBatteryPowerWatts = existing.battery.sensorBatteryPowerWatts
-            battery.adapterInputWatts = existing.battery.adapterInputWatts
+            if !battery.hasSystemPower {
+                battery.systemPowerWatts = existing.battery.systemPowerWatts
+                battery.hasSystemPower = existing.battery.hasSystemPower
+            }
         }
         return HardwareSnapshot(
             battery: battery,
@@ -1738,86 +1815,6 @@ private enum HardwareScanner {
         }.sorted { $0.id < $1.id }
     }
 
-    private static func batterySnapshot() -> BatterySnapshot {
-        let output = run("/usr/sbin/ioreg", arguments: ["-r", "-c", "AppleSmartBattery", "-l"])
-        guard output.contains("AppleSmartBattery") else { return BatterySnapshot() }
-
-        func topNumber(_ key: String) -> Double {
-            Double(output.firstMatch("(?m)^      \"\(NSRegularExpression.escapedPattern(for: key))\" = (-?[0-9]+)") ?? "0") ?? 0
-        }
-        func topSignedNumber(_ key: String) -> Double {
-            let raw = output.firstMatch("(?m)^      \"\(NSRegularExpression.escapedPattern(for: key))\" = (-?[0-9]+)") ?? "0"
-            if let signed = Int64(raw) { return Double(signed) }
-            if let unsigned = UInt64(raw) { return Double(Int64(bitPattern: unsigned)) }
-            return 0
-        }
-        func topBool(_ key: String) -> Bool {
-            (output.firstMatch("(?m)^      \"\(NSRegularExpression.escapedPattern(for: key))\" = (Yes|No)") ?? "No") == "Yes"
-        }
-        func topString(_ key: String) -> String {
-            output.firstMatch("(?m)^      \"\(NSRegularExpression.escapedPattern(for: key))\" = \"([^\"]*)\"") ?? ""
-        }
-
-        let adapterLine = output.firstMatch(#"(?m)^      "AdapterDetails" = \{([^\n]+)\}"#) ?? ""
-        let telemetryLine = output.firstMatch(#"(?m)^      "PowerTelemetryData" = \{([^\n]+)\}"#) ?? ""
-        let externalPowerConnected = topBool("ExternalConnected")
-        let parsedAdapter = adapterLine.isEmpty ? nil : adapterSnapshot(from: adapterLine)
-        let adapter = externalPowerConnected && (parsedAdapter?.ratedWatts ?? 0) > 0 ? parsedAdapter : nil
-        let rawTime = Int(topNumber("TimeRemaining"))
-        let rawTemperature = topNumber("Temperature")
-        let temperature = rawTemperature > 1_000 ? rawTemperature / 10 - 273.15 : rawTemperature
-        let systemPowerMW = Double(telemetryLine.firstMatch(#""SystemLoad"=([0-9]+)"#) ?? "0") ?? 0
-
-        return BatterySnapshot(
-            isPresent: topBool("BatteryInstalled"),
-            chargePercent: topNumber("CurrentCapacity"),
-            isCharging: topBool("IsCharging"),
-            isFullyCharged: topBool("FullyCharged"),
-            externalPowerConnected: externalPowerConnected,
-            cycleCount: Int(topNumber("CycleCount")),
-            designCycleCount: Int(topNumber("DesignCycleCount9C")),
-            currentCapacityMAh: topNumber("AppleRawCurrentCapacity"),
-            fullChargeCapacityMAh: topNumber("NominalChargeCapacity"),
-            designCapacityMAh: topNumber("DesignCapacity"),
-            voltageVolts: topNumber("Voltage") / 1_000,
-            currentAmps: {
-                let amps = topSignedNumber("Amperage") / 1_000
-                return abs(amps) <= 100 ? amps : 0
-            }(),
-            temperatureCelsius: temperature,
-            timeRemainingMinutes: rawTime > 0 && rawTime < 65_535 ? rawTime : nil,
-            serial: topString("Serial"),
-            adapter: adapter,
-            systemPowerWatts: systemPowerMW / 1_000
-        )
-    }
-
-    private static func adapterSnapshot(from line: String) -> PowerAdapterSnapshot {
-        func number(_ key: String) -> Double {
-            Double(line.firstMatch("\"\(NSRegularExpression.escapedPattern(for: key))\"=([0-9]+)") ?? "0") ?? 0
-        }
-        func string(_ key: String) -> String {
-            line.firstMatch("\"\(NSRegularExpression.escapedPattern(for: key))\"=\"([^\"]*)\"") ?? ""
-        }
-        let regex = try? NSRegularExpression(pattern: #""MaxCurrent"=([0-9]+),"MaxVoltage"=([0-9]+)"#)
-        let range = NSRange(line.startIndex..<line.endIndex, in: line)
-        let profiles = (regex?.matches(in: line, range: range) ?? []).compactMap { match -> PowerProfile? in
-            guard let currentRange = Range(match.range(at: 1), in: line),
-                  let voltageRange = Range(match.range(at: 2), in: line),
-                  let current = Double(line[currentRange]),
-                  let voltage = Double(line[voltageRange]) else { return nil }
-            return PowerProfile(voltageVolts: voltage / 1_000, currentAmps: current / 1_000)
-        }
-        return PowerAdapterSnapshot(
-            name: string("Name").isEmpty ? "USB-C power adapter" : string("Name"),
-            manufacturer: string("Manufacturer").isEmpty ? "Not reported" : string("Manufacturer"),
-            serial: string("SerialString"),
-            ratedWatts: number("Watts"),
-            negotiatedVoltage: number("AdapterVoltage") / 1_000,
-            negotiatedCurrent: number("Current") / 1_000,
-            profiles: profiles
-        )
-    }
 
     private static func thermalState() -> String {
         switch ProcessInfo.processInfo.thermalState {
diff --git a/Sources/puter/ToolbarIconButtonStyle.swift b/Sources/puter/ToolbarIconButtonStyle.swift
new file mode 100644
index 0000000..fae1c28
--- /dev/null
+++ b/Sources/puter/ToolbarIconButtonStyle.swift
@@ -0,0 +1,12 @@
+import SwiftUI
+
+/// Own the outer glass dimensions instead of inheriting bezel padding.
+struct ToolbarIconButtonStyle: ButtonStyle {
+    func makeBody(configuration: Configuration) -> some View {
+        configuration.label
+            .frame(width: PuterLayout.toolbarControlHeight, height: PuterLayout.toolbarControlHeight)
+            .contentShape(.circle)
+            .modifier(SearchGlassSurface())
+            .opacity(configuration.isPressed ? 0.7 : 1)
+    }
+}
diff --git a/Sources/puter/ToolbarSearchField.swift b/Sources/puter/ToolbarSearchField.swift
new file mode 100644
index 0000000..b2c8678
--- /dev/null
+++ b/Sources/puter/ToolbarSearchField.swift
@@ -0,0 +1,33 @@
+import SwiftUI
+
+struct ToolbarSearchField: View {
+    @Binding var text: String
+    let prompt: String
+    @State private var focused = false
+
+    var body: some View {
+        HStack(spacing: 8) {
+            Button("Find", systemImage: "magnifyingglass") { focused = true }
+                .labelStyle(.iconOnly)
+                .buttonStyle(.plain)
+                .foregroundStyle(.secondary)
+                .keyboardShortcut("f", modifiers: .command)
+                .help("Find (⌘F)")
+            ToolbarSearchInput(text: $text, focused: $focused, prompt: prompt)
+            Button("Clear search", systemImage: "xmark.circle.fill") { text = ""; focused = true }
+                .labelStyle(.iconOnly)
+                .buttonStyle(.plain)
+                .foregroundStyle(.secondary)
+                .disabled(text.isEmpty)
+                .opacity(text.isEmpty ? 0 : 1)
+                .accessibilityHidden(text.isEmpty)
+        }
+        .padding(.horizontal, 12)
+        .frame(width: 256, height: PuterLayout.toolbarControlHeight)
+        .modifier(SearchGlassSurface())
+        .overlay {
+            Capsule().strokeBorder(focused ? Color.accentColor : .clear, lineWidth: 2)
+                .allowsHitTesting(false)
+        }
+    }
+}
diff --git a/Sources/puter/ToolbarSearchInput.swift b/Sources/puter/ToolbarSearchInput.swift
new file mode 100644
index 0000000..b311e6e
--- /dev/null
+++ b/Sources/puter/ToolbarSearchInput.swift
@@ -0,0 +1,62 @@
+import AppKit
+import SwiftUI
+
+/// Native field-editor focus is reliable inside a hosted macOS toolbar item.
+struct ToolbarSearchInput: NSViewRepresentable {
+    @Binding var text: String
+    @Binding var focused: Bool
+    let prompt: String
+
+    func makeCoordinator() -> Coordinator { Coordinator(self) }
+
+    func makeNSView(context: Context) -> NSTextField {
+        let field = NSTextField()
+        field.isBordered = false
+        field.drawsBackground = false
+        field.focusRingType = .none
+        field.font = .systemFont(ofSize: NSFont.systemFontSize)
+        field.delegate = context.coordinator
+        field.setContentCompressionResistancePriority(.defaultLow, for: .horizontal)
+        return field
+    }
+
+    func updateNSView(_ field: NSTextField, context: Context) {
+        context.coordinator.parent = self
+        if field.stringValue != text { field.stringValue = text }
+        field.placeholderString = prompt
+        field.setAccessibilityLabel(prompt)
+        if focused, field.currentEditor() == nil {
+            field.window?.makeFirstResponder(field)
+        } else if !focused, field.currentEditor() != nil {
+            field.window?.makeFirstResponder(nil)
+        }
+    }
+
+    final class Coordinator: NSObject, NSTextFieldDelegate {
+        var parent: ToolbarSearchInput
+        init(_ parent: ToolbarSearchInput) { self.parent = parent }
+
+        func controlTextDidChange(_ notification: Notification) {
+            guard let field = notification.object as? NSTextField else { return }
+            parent.text = field.stringValue
+        }
+
+        func controlTextDidBeginEditing(_ notification: Notification) {
+            parent.focused = true
+        }
+
+        func controlTextDidEndEditing(_ notification: Notification) {
+            parent.focused = false
+        }
+
+        func control(_ control: NSControl, textView: NSTextView, doCommandBy command: Selector) -> Bool {
+            guard command == #selector(NSResponder.cancelOperation(_:)) else { return false }
+            if parent.text.isEmpty {
+                parent.focused = false
+            } else {
+                parent.text = ""
+            }
+            return true
+        }
+    }
+}
diff --git a/Tests/puterTests/BatteryRegistryTests.swift b/Tests/puterTests/BatteryRegistryTests.swift
new file mode 100644
index 0000000..28457d3
--- /dev/null
+++ b/Tests/puterTests/BatteryRegistryTests.swift
@@ -0,0 +1,77 @@
+import XCTest
+@testable import puter
+
+final class BatteryRegistryTests: XCTestCase {
+    func testChargingSeparatesLoadInputAndCapability() {
+        let result = BatteryRegistryReader.parse([
+            "BatteryInstalled": true, "ExternalConnected": true, "IsCharging": true,
+            "CurrentCapacity": 77, "Voltage": 12_500, "Amperage": 3_600,
+            "PowerTelemetryData": ["SystemLoad": 15_000, "SystemPowerIn": 61_000],
+            "AdapterDetails": ["Name": "140W USB-C Power Adapter", "Watts": 94,
+                               "AdapterVoltage": 20_000, "Current": 4_700,
+                               "UsbHvcMenu": [["MaxVoltage": 20_000, "MaxCurrent": 4_700]]]
+        ])
+        XCTAssertTrue(result.isPresent)
+        XCTAssertEqual(result.systemPowerWatts, 15)
+        XCTAssertEqual(result.adapterInputWatts, 61)
+        XCTAssertEqual(result.measuredBatteryWatts, 45)
+        XCTAssertEqual(result.batteryFlowTitle, "Battery charging")
+        XCTAssertEqual(result.adapter?.negotiatedWatts, 94)
+        XCTAssertEqual(result.adapter?.profiles.count, 1)
+    }
+
+    func testUnsignedNegativeCurrentAndDisconnectedStaleAdapter() {
+        let result = BatteryRegistryReader.parse([
+            "BatteryInstalled": true, "ExternalConnected": false, "Voltage": 12_000,
+            "Amperage": NSNumber(value: UInt64(bitPattern: -2_000)),
+            "PowerTelemetryData": ["SystemPowerIn": 50_000],
+            "AdapterDetails": ["Watts": 94]
+        ])
+        XCTAssertEqual(result.currentAmps, -2)
+        XCTAssertEqual(result.measuredBatteryWatts, 24)
+        XCTAssertEqual(result.batteryFlowTitle, "Battery discharge")
+        XCTAssertNil(result.adapter)
+        XCTAssertFalse(result.hasAdapterInput)
+        XCTAssertEqual(result.adapterInputWatts, 0)
+    }
+
+    func testZeroIsDifferentFromMissing() {
+        let idle = BatteryRegistryReader.parse(["BatteryInstalled": true, "Voltage": 12_000, "Amperage": 0])
+        XCTAssertEqual(idle.measuredBatteryWatts, 0)
+        XCTAssertEqual(idle.batteryFlowTitle, "Battery idle")
+        let absent = BatteryRegistryReader.parse([:])
+        XCTAssertNil(absent.measuredBatteryWatts)
+        XCTAssertFalse(absent.hasSystemPower)
+        XCTAssertEqual(absent.powerSourceDescription, "External power")
+    }
+
+    func testNestedCapacityOnNewerBatteryRegistry() {
+        let result = BatteryRegistryReader.parse(["BatteryInstalled": true,
+            "BatteryData": ["NominalChargeCapacity": 5630, "DesignCapacity": 6249, "RemainingCapacity": 4600]])
+        XCTAssertEqual(result.fullChargeCapacityMAh, 5630)
+        XCTAssertEqual(result.designCapacityMAh, 6249)
+        XCTAssertEqual(result.currentCapacityMAh, 4600)
+        XCTAssertEqual(result.healthPercent, 90.09, accuracy: 0.01)
+        XCTAssertFalse(result.hasBatteryTemperature)
+    }
+
+    func testInvalidPowerAndCurrentAreNotMeasurements() {
+        let result = BatteryRegistryReader.parse([
+            "BatteryInstalled": true, "Voltage": 12_000, "Amperage": 999_999,
+            "PowerTelemetryData": ["SystemLoad": Double.nan, "SystemPowerIn": -10]
+        ])
+        XCTAssertNil(result.measuredBatteryWatts)
+        XCTAssertFalse(result.hasSystemPower)
+        XCTAssertFalse(result.hasAdapterInput)
+    }
+
+    func testOpenDropdownRequestsPowerButNotFullInventory() {
+        let demand = SamplingDemand(active: false, section: .processes, speed: .normal,
+                                    recording: false, alerts: false, menuBar: true, powerMenu: false,
+                                    menuPresented: true)
+        XCTAssertTrue(demand.hardware)
+        XCTAssertTrue(demand.telemetry)
+        XCTAssertFalse(demand.processInventory)
+        XCTAssertEqual(demand.interval, .seconds(5))
+    }
+}
diff --git a/Tests/puterTests/ProcessGroupingTests.swift b/Tests/puterTests/ProcessGroupingTests.swift
new file mode 100644
index 0000000..33ac25f
--- /dev/null
+++ b/Tests/puterTests/ProcessGroupingTests.swift
@@ -0,0 +1,37 @@
+import XCTest
+@testable import puter
+
+final class ProcessGroupingTests: XCTestCase {
+    @MainActor
+    func testPrecomputedGroupsPreserveMemberSearchAndTotals() {
+        let records = [record(41, path: "/Applications/Example.app/Contents/MacOS/Example"),
+                       record(42, path: "/Applications/Example.app/Contents/Helpers/Worker"),
+                       record(43, path: "/usr/bin/tool")]
+        let groups = ProcessGrouping.groups(from: records, searchText: "")
+        XCTAssertEqual(groups.count, 2)
+        let app = ProcessGrouping.filtered(groups, searchText: "Example")
+        XCTAssertEqual(app.count, 1)
+        XCTAssertEqual(app.first?.processes.count, 2)
+        XCTAssertEqual(app.first?.cpu, 4)
+        let member = ProcessGrouping.filtered(groups, searchText: "42")
+        XCTAssertEqual(member.first?.processes.map(\.pid), [42])
+        XCTAssertEqual(member.first?.id, app.first?.id)
+        XCTAssertTrue(ProcessGrouping.filtered(groups, searchText: "unmatched").isEmpty)
+    }
+
+    @MainActor
+    func testPathCachePreservesSingletonsAndFreshTelemetry() {
+        let first = ProcessGrouping.groups(from: [record(41, path: "/usr/bin/tool")], searchText: "")
+        let second = ProcessGrouping.groups(from: [record(42, path: "/usr/bin/tool")], searchText: "")
+        XCTAssertNotEqual(first.first?.id, second.first?.id)
+        let mixedCase = ProcessGrouping.groups(from: [record(43, path: "/Applications/Test.APP/Contents/MacOS/Test")], searchText: "")
+        XCTAssertEqual(mixedCase.first?.appPath, "/Applications/Test.app")
+    }
+
+    private func record(_ pid: Int32, path: String) -> ProcessRecord {
+        ProcessRecord(pid: pid, parentPID: 1, name: "worker", executablePath: path,
+                      user: "tester", cpu: 2, memoryPercent: 1, residentBytes: 1024,
+                      state: "S", elapsed: "00:01", cpuTime: 0, threadCount: 1,
+                      openFileCount: 0, architecture: "ARM64", priority: 31, nice: 0)
+    }
+}
diff --git a/Tests/puterTests/SamplingDemandTests.swift b/Tests/puterTests/SamplingDemandTests.swift
new file mode 100644
index 0000000..07f8b48
--- /dev/null
+++ b/Tests/puterTests/SamplingDemandTests.swift
@@ -0,0 +1,66 @@
+import XCTest
+@testable import puter
+
+final class SamplingDemandTests: XCTestCase {
+    func testNoConsumerMeansNoTimer() {
+        let demand = make(active: false)
+        XCTAssertNil(demand.interval)
+        XCTAssertFalse(demand.processInventory)
+        XCTAssertFalse(demand.hardware)
+        XCTAssertFalse(demand.services)
+    }
+
+    func testBackgroundMenuUsesLightweightCountersOnly() {
+        let demand = make(active: false, menu: true)
+        XCTAssertEqual(demand.interval, .seconds(10))
+        XCTAssertTrue(demand.telemetry)
+        XCTAssertFalse(demand.processInventory)
+        XCTAssertFalse(demand.services)
+        XCTAssertFalse(demand.hardware)
+    }
+
+    func testSettingsWithoutConsumersIsIdle() {
+        XCTAssertNil(make(section: .settings).interval)
+    }
+
+    func testServicesOnlyScansVisibleServices() {
+        let demand = make(section: .services)
+        XCTAssertTrue(demand.services)
+        XCTAssertFalse(demand.telemetry)
+        XCTAssertFalse(demand.processInventory)
+        XCTAssertEqual(demand.interval, .seconds(3))
+    }
+
+    func testRecordingKeepsBackgroundTelemetry() {
+        let demand = make(active: false, recording: true)
+        XCTAssertTrue(demand.processInventory)
+        XCTAssertTrue(demand.telemetry)
+        XCTAssertTrue(demand.hardware)
+        XCTAssertEqual(demand.interval, UpdateSpeed.normal.interval)
+    }
+
+    func testPauseStopsEvenRecordingTimer() {
+        XCTAssertNil(make(speed: .paused, recording: true, menu: true).interval)
+    }
+
+    func testPowerMenuOnlyNeedsHardware() {
+        let demand = make(active: false, menu: true, power: true)
+        XCTAssertTrue(demand.hardware)
+        XCTAssertFalse(demand.telemetry)
+        XCTAssertFalse(demand.processInventory)
+    }
+
+    func testAlertsRetainSystemSamplingWithoutProcessScan() {
+        let demand = make(active: false, alerts: true)
+        XCTAssertTrue(demand.telemetry)
+        XCTAssertFalse(demand.processInventory)
+        XCTAssertNotNil(demand.interval)
+    }
+
+    private func make(active: Bool = true, section: TaskSection = .processes,
+                      speed: UpdateSpeed = .normal, recording: Bool = false,
+                      alerts: Bool = false, menu: Bool = false, power: Bool = false) -> SamplingDemand {
+        SamplingDemand(active: active, section: section, speed: speed,
+                       recording: recording, alerts: alerts, menuBar: menu, powerMenu: power)
+    }
+}
diff --git a/puter.icon/Assets/loop-p-geometric.svg b/puter.icon/Assets/loop-p-geometric.svg
new file mode 100644
index 0000000..c567b92
--- /dev/null
+++ b/puter.icon/Assets/loop-p-geometric.svg
@@ -0,0 +1,15 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="1024" height="1024" viewBox="0 0 1024 1024">
+  <!-- Circular loop: concentric radii 300 and 188, exactly 112 units thick.
+       Stem: x=212...324, also 112 units, tangent to the outer circle.
+       A single outline avoids overlapping glass surfaces at the join. -->
+  <path fill="#f2fff7" fill-rule="evenodd" d="
+    M 212 454
+    A 300 300 0 1 1 324 687.760561259
+    L 324 814
+    A 56 56 0 0 1 212 814
+    Z
+    M 324 454
+    A 188 188 0 1 0 700 454
+    A 188 188 0 1 0 324 454
+    Z"/>
+</svg>
diff --git a/puter.icon/Assets/meter-needle-geometric.svg b/puter.icon/Assets/meter-needle-geometric.svg
new file mode 100644
index 0000000..6245452
--- /dev/null
+++ b/puter.icon/Assets/meter-needle-geometric.svg
@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="1024" height="1024" viewBox="0 0 1024 1024">
+  <!-- Constant-width 48-unit capsule, separate editable Composer layer. -->
+  <path d="M 504 462 L 574 392" fill="none" stroke="#f2fff7" stroke-width="48" stroke-linecap="round"/>
+</svg>
diff --git a/puter.icon/Assets/puter-white.png b/puter.icon/Assets/puter-white.png
deleted file mode 100644
index 3a091a9..0000000
Binary files a/puter.icon/Assets/puter-white.png and /dev/null differ
diff --git a/puter.icon/icon.json b/puter.icon/icon.json
index 416f4a6..131e83a 100644
--- a/puter.icon/icon.json
+++ b/puter.icon/icon.json
@@ -1,8 +1,8 @@
 {
   "fill" : {
     "linear-gradient" : [
-      "display-p3:0.36538,0.78082,0.24349,1.00000",
-      "display-p3:0.22503,0.48767,0.15523,1.00000"
+      "display-p3:0.14000,0.43000,0.33000,1.00000",
+      "display-p3:0.03500,0.18000,0.16000,1.00000"
     ],
     "orientation" : {
       "start" : {
@@ -19,30 +19,32 @@
     {
       "layers" : [
         {
-          "image-name" : "puter-white.png",
-          "name" : "puter-white",
-          "opacity-specializations" : [
-            {
-              "appearance" : "dark",
-              "value" : 0.6
-            }
-          ],
+          "fill" : {
+            "solid" : "display-p3:0.95000,1.00000,0.97000,1.00000"
+          },
+          "image-name" : "loop-p-geometric.svg",
+          "name" : "Circular loop p · 112pt",
           "position" : {
-            "scale" : 0.9,
+            "scale" : 1,
             "translation-in-points" : [
               0,
               0
             ]
           }
+        },
+        {
+          "image-name" : "meter-needle-geometric.svg",
+          "name" : "Meter needle",
+          "fill" : { "solid" : "display-p3:0.95000,1.00000,0.97000,1.00000" }
         }
       ],
       "shadow" : {
         "kind" : "neutral",
-        "opacity" : 0.5
+        "opacity" : 0.35
       },
       "translucency" : {
         "enabled" : true,
-        "value" : 0.5
+        "value" : 0.25
       }
     }
   ],
@@ -52,4 +54,4 @@
     ],
     "squares" : "shared"
   }
-}
\ No newline at end of file
+}