diff --git a/Lite/Controls/CorrelatedTimelineLanesControl.xaml.cs b/Lite/Controls/CorrelatedTimelineLanesControl.xaml.cs
index d39775a..beb4c57 100644
--- a/Lite/Controls/CorrelatedTimelineLanesControl.xaml.cs
+++ b/Lite/Controls/CorrelatedTimelineLanesControl.xaml.cs
@@ -287,7 +287,7 @@ private void UpdateBlockingLane(List<(double Time, double Value)> blockingData,
             meanLine.LineWidth = 1;
         }
 
-        BlockingChart.Plot.Axes.DateTimeTicksBottom();
+        BlockingChart.Plot.Axes.DateTimeTicksBottomDateChange();
         BlockingChart.Plot.Axes.Bottom.TickLabelStyle.IsVisible = false;
         ReapplyAxisColors(BlockingChart);
 
@@ -363,7 +363,7 @@ private void UpdateLane(ScottPlot.WPF.WpfPlot chart, string title,
 
         _crosshairManager?.SetLaneData(chart, times, values);
 
-        chart.Plot.Axes.DateTimeTicksBottom();
+        chart.Plot.Axes.DateTimeTicksBottomDateChange();
         // Hide bottom tick labels on all lanes except the last (File I/O)
         if (chart != FileIoChart)
             chart.Plot.Axes.Bottom.TickLabelStyle.IsVisible = false;
diff --git a/Lite/Controls/ServerTab.xaml b/Lite/Controls/ServerTab.xaml
index c04d23d..e85bc38 100644
--- a/Lite/Controls/ServerTab.xaml
+++ b/Lite/Controls/ServerTab.xaml
@@ -202,7 +202,7 @@
             <!-- Query Performance Tab -->
             <TabItem Header="Queries">
                 <Grid Margin="8">
-                    <TabControl x:Name="QueriesSubTabControl" Background="Transparent" BorderThickness="0">
+                    <TabControl x:Name="QueriesSubTabControl" Background="Transparent" BorderThickness="0" ItemContainerStyle="{DynamicResource SubTabItemStyle}">
                         <TabItem Header="Performance Trends">
                             <Grid>
                                 <Grid.RowDefinitions>
@@ -1046,7 +1046,7 @@
 
             <!-- Memory Tab -->
             <TabItem Header="Memory">
-                <TabControl x:Name="MemorySubTabControl" Background="Transparent" BorderThickness="0">
+                <TabControl x:Name="MemorySubTabControl" Background="Transparent" BorderThickness="0" ItemContainerStyle="{DynamicResource SubTabItemStyle}">
                     <!-- Memory Overview Sub-Tab -->
                     <TabItem Header="Overview">
                         <Grid Margin="8">
@@ -1182,7 +1182,7 @@
             <!-- File I/O Tab -->
             <TabItem Header="File I/O">
                 <Grid Margin="8">
-                    <TabControl Background="Transparent" BorderThickness="0">
+                    <TabControl Background="Transparent" BorderThickness="0" ItemContainerStyle="{DynamicResource SubTabItemStyle}">
                         <!-- File I/O Latency sub-tab -->
                         <TabItem Header="File I/O Latency">
                             <Grid>
@@ -1239,7 +1239,7 @@
             <!-- Blocking Tab -->
             <TabItem Header="Blocking">
                 <Grid Margin="8">
-                    <TabControl x:Name="BlockingSubTabControl" Background="Transparent" BorderThickness="0">
+                    <TabControl x:Name="BlockingSubTabControl" Background="Transparent" BorderThickness="0" ItemContainerStyle="{DynamicResource SubTabItemStyle}">
                         <TabItem Header="Trends">
                             <Grid>
                                 <Grid.RowDefinitions>
@@ -1578,7 +1578,7 @@
             <!-- Configuration Tab -->
             <TabItem Header="Configuration">
                 <Grid Margin="8">
-                    <TabControl Background="Transparent" BorderThickness="0">
+                    <TabControl Background="Transparent" BorderThickness="0" ItemContainerStyle="{DynamicResource SubTabItemStyle}">
                         <TabItem Header="Server Configuration">
                             <DataGrid x:Name="ServerConfigGrid"
                                       AutoGenerateColumns="False" IsReadOnly="True"
@@ -1802,7 +1802,7 @@
             <!-- Collection Health Tab -->
             <TabItem Header="Collection Health">
                 <Grid Margin="8">
-                    <TabControl Background="Transparent" BorderThickness="0">
+                    <TabControl Background="Transparent" BorderThickness="0" ItemContainerStyle="{DynamicResource SubTabItemStyle}">
                         <TabItem Header="Health Summary">
                             <DataGrid x:Name="CollectionHealthGrid"
                                       AutoGenerateColumns="False" IsReadOnly="True"
diff --git a/Lite/Controls/ServerTab.xaml.cs b/Lite/Controls/ServerTab.xaml.cs
index caeabfe..24ed8f9 100644
--- a/Lite/Controls/ServerTab.xaml.cs
+++ b/Lite/Controls/ServerTab.xaml.cs
@@ -135,7 +135,7 @@ public ServerTab(ServerConnection server, DuckDbInitializer duckDb, CredentialSe
         ServerTimeHelper.UtcOffsetMinutes = utcOffsetMinutes;
 
         ServerNameText.Text = server.ReadOnlyIntent ? $"{server.DisplayName} (Read-Only)" : server.DisplayName;
-        ConnectionStatusText.Text = server.ServerNameDisplay;
+        ConnectionStatusText.Text = "Connecting...";
 
         /* Apply default time range from settings */
         TimeRangeCombo.SelectedIndex = App.DefaultTimeRangeHours switch
@@ -841,7 +841,7 @@ private async System.Threading.Tasks.Task RefreshAllDataAsync(bool fullRefresh =
             }
 
             var tz = ServerTimeHelper.GetTimezoneLabel(ServerTimeHelper.CurrentDisplayMode);
-            ConnectionStatusText.Text = $"{_server.ServerNameDisplay} - Last refresh: {DateTime.Now:HH:mm:ss} ({tz})";
+            ConnectionStatusText.Text = $"Last refresh: {DateTime.Now:HH:mm:ss} ({tz})";
         }
         catch (Exception ex)
         {
@@ -1876,7 +1876,7 @@ private void UpdateCpuChart(List<CpuUtilizationRow> data)
         otherPlot.Color = ScottPlot.Color.FromHex("#E57373");
         _cpuHover?.Add(otherPlot, "Other");
 
-        CpuChart.Plot.Axes.DateTimeTicksBottom();
+        CpuChart.Plot.Axes.DateTimeTicksBottomDateChange();
         ReapplyAxisColors(CpuChart);
         CpuChart.Plot.YLabel("CPU %");
         CpuChart.Plot.Axes.SetLimitsY(0, 105);
@@ -1932,7 +1932,7 @@ private void UpdateMemoryChart(List<MemoryTrendPoint> data, List<MemoryTrendPoin
         grantPlot.Color = ScottPlot.Color.FromHex("#FFB74D");
         _memoryHover?.Add(grantPlot, "Memory Grants");
 
-        MemoryChart.Plot.Axes.DateTimeTicksBottom();
+        MemoryChart.Plot.Axes.DateTimeTicksBottomDateChange();
         ReapplyAxisColors(MemoryChart);
         MemoryChart.Plot.YLabel("Memory (GB)");
 
@@ -1989,7 +1989,7 @@ private void UpdateMemoryGrantCharts(List<MemoryGrantChartPoint> data)
             }
         }
 
-        MemoryGrantSizingChart.Plot.Axes.DateTimeTicksBottom();
+        MemoryGrantSizingChart.Plot.Axes.DateTimeTicksBottomDateChange();
         ReapplyAxisColors(MemoryGrantSizingChart);
         MemoryGrantSizingChart.Plot.YLabel("Memory (MB)");
         SetChartYLimitsWithLegendPadding(MemoryGrantSizingChart, 0, sizingMax > 0 ? sizingMax : 100);
@@ -2025,7 +2025,7 @@ private void UpdateMemoryGrantCharts(List<MemoryGrantChartPoint> data)
             }
         }
 
-        MemoryGrantActivityChart.Plot.Axes.DateTimeTicksBottom();
+        MemoryGrantActivityChart.Plot.Axes.DateTimeTicksBottomDateChange();
         ReapplyAxisColors(MemoryGrantActivityChart);
         MemoryGrantActivityChart.Plot.YLabel("Count");
         SetChartYLimitsWithLegendPadding(MemoryGrantActivityChart, 0, activityMax > 0 ? activityMax : 10);
@@ -2061,7 +2061,7 @@ private void UpdateTempDbChart(List<TempDbRow> data)
         vsPlot.Color = ScottPlot.Color.FromHex("#81C784");
         _tempDbHover?.Add(vsPlot, "Version Store");
 
-        TempDbChart.Plot.Axes.DateTimeTicksBottom();
+        TempDbChart.Plot.Axes.DateTimeTicksBottomDateChange();
         ReapplyAxisColors(TempDbChart);
         TempDbChart.Plot.YLabel("MB");
 
@@ -2107,7 +2107,7 @@ private void UpdateTempDbFileIoChart(List<FileIoTrendPoint> data)
             }
         }
 
-        TempDbFileIoChart.Plot.Axes.DateTimeTicksBottom();
+        TempDbFileIoChart.Plot.Axes.DateTimeTicksBottomDateChange();
         ReapplyAxisColors(TempDbFileIoChart);
         TempDbFileIoChart.Plot.YLabel("TempDB File I/O Latency (ms)");
         SetChartYLimitsWithLegendPadding(TempDbFileIoChart, 0, maxLatency > 0 ? maxLatency : 10);
@@ -2191,14 +2191,14 @@ private void UpdateFileIoCharts(List<FileIoTrendPoint> data)
             }
         }
 
-        FileIoReadChart.Plot.Axes.DateTimeTicksBottom();
+        FileIoReadChart.Plot.Axes.DateTimeTicksBottomDateChange();
         ReapplyAxisColors(FileIoReadChart);
         FileIoReadChart.Plot.YLabel("Read Latency (ms)");
         SetChartYLimitsWithLegendPadding(FileIoReadChart, 0, readMax > 0 ? readMax : 10);
         ShowChartLegend(FileIoReadChart);
         FileIoReadChart.Refresh();
 
-        FileIoWriteChart.Plot.Axes.DateTimeTicksBottom();
+        FileIoWriteChart.Plot.Axes.DateTimeTicksBottomDateChange();
         ReapplyAxisColors(FileIoWriteChart);
         FileIoWriteChart.Plot.YLabel("Write Latency (ms)");
         SetChartYLimitsWithLegendPadding(FileIoWriteChart, 0, writeMax > 0 ? writeMax : 10);
@@ -2255,14 +2255,14 @@ private void UpdateFileIoThroughputCharts(List<FileIoThroughputPoint> data)
             }
         }
 
-        FileIoReadThroughputChart.Plot.Axes.DateTimeTicksBottom();
+        FileIoReadThroughputChart.Plot.Axes.DateTimeTicksBottomDateChange();
         ReapplyAxisColors(FileIoReadThroughputChart);
         FileIoReadThroughputChart.Plot.YLabel("Read Throughput (MB/s)");
         SetChartYLimitsWithLegendPadding(FileIoReadThroughputChart, 0, readMax > 0 ? readMax : 1);
         ShowChartLegend(FileIoReadThroughputChart);
         FileIoReadThroughputChart.Refresh();
 
-        FileIoWriteThroughputChart.Plot.Axes.DateTimeTicksBottom();
+        FileIoWriteThroughputChart.Plot.Axes.DateTimeTicksBottomDateChange();
         ReapplyAxisColors(FileIoWriteThroughputChart);
         FileIoWriteThroughputChart.Plot.YLabel("Write Throughput (MB/s)");
         SetChartYLimitsWithLegendPadding(FileIoWriteThroughputChart, 0, writeMax > 0 ? writeMax : 1);
@@ -2298,7 +2298,7 @@ private void UpdateLockWaitTrendChart(List<LockWaitTrendPoint> data, int hoursBa
             zeroLine.LegendText = "Lock Waits";
             zeroLine.Color = ScottPlot.Color.FromHex("#4FC3F7");
             zeroLine.MarkerSize = 0;
-            LockWaitTrendChart.Plot.Axes.DateTimeTicksBottom();
+            LockWaitTrendChart.Plot.Axes.DateTimeTicksBottomDateChange();
             LockWaitTrendChart.Plot.Axes.SetLimitsX(rangeStart.ToOADate(), rangeEnd.ToOADate());
             ReapplyAxisColors(LockWaitTrendChart);
             LockWaitTrendChart.Plot.YLabel("Lock Wait Time (ms/sec)");
@@ -2325,7 +2325,7 @@ private void UpdateLockWaitTrendChart(List<LockWaitTrendPoint> data, int hoursBa
             if (values.Length > 0) globalMax = Math.Max(globalMax, values.Max());
         }
 
-        LockWaitTrendChart.Plot.Axes.DateTimeTicksBottom();
+        LockWaitTrendChart.Plot.Axes.DateTimeTicksBottomDateChange();
         LockWaitTrendChart.Plot.Axes.SetLimitsX(rangeStart.ToOADate(), rangeEnd.ToOADate());
         ReapplyAxisColors(LockWaitTrendChart);
         LockWaitTrendChart.Plot.YLabel("Lock Wait Time (ms/sec)");
@@ -2362,7 +2362,7 @@ private void UpdateBlockingTrendChart(List<TrendPoint> data, int hoursBack, Date
             zeroLine.LegendText = "Blocking Incidents";
             zeroLine.Color = ScottPlot.Color.FromHex("#E57373");
             zeroLine.MarkerSize = 0;
-            BlockingTrendChart.Plot.Axes.DateTimeTicksBottom();
+            BlockingTrendChart.Plot.Axes.DateTimeTicksBottomDateChange();
             BlockingTrendChart.Plot.Axes.SetLimitsX(rangeStart.ToOADate(), rangeEnd.ToOADate());
             ReapplyAxisColors(BlockingTrendChart);
             BlockingTrendChart.Plot.YLabel("Blocking Incidents");
@@ -2404,7 +2404,7 @@ private void UpdateBlockingTrendChart(List<TrendPoint> data, int hoursBack, Date
         plot.MarkerSize = 0; /* No markers, just lines */
         _blockingTrendHover?.Add(plot, "Blocking Incidents");
 
-        BlockingTrendChart.Plot.Axes.DateTimeTicksBottom();
+        BlockingTrendChart.Plot.Axes.DateTimeTicksBottomDateChange();
         BlockingTrendChart.Plot.Axes.SetLimitsX(rangeStart.ToOADate(), rangeEnd.ToOADate());
         ReapplyAxisColors(BlockingTrendChart);
         BlockingTrendChart.Plot.YLabel("Blocking Incidents");
@@ -2441,7 +2441,7 @@ private void UpdateDeadlockTrendChart(List<TrendPoint> data, int hoursBack, Date
             zeroLine.LegendText = "Deadlocks";
             zeroLine.Color = ScottPlot.Color.FromHex("#FFB74D");
             zeroLine.MarkerSize = 0;
-            DeadlockTrendChart.Plot.Axes.DateTimeTicksBottom();
+            DeadlockTrendChart.Plot.Axes.DateTimeTicksBottomDateChange();
             DeadlockTrendChart.Plot.Axes.SetLimitsX(rangeStart.ToOADate(), rangeEnd.ToOADate());
             ReapplyAxisColors(DeadlockTrendChart);
             DeadlockTrendChart.Plot.YLabel("Deadlocks");
@@ -2483,7 +2483,7 @@ private void UpdateDeadlockTrendChart(List<TrendPoint> data, int hoursBack, Date
         plot.MarkerSize = 0; /* No markers, just lines */
         _deadlockTrendHover?.Add(plot, "Deadlocks");
 
-        DeadlockTrendChart.Plot.Axes.DateTimeTicksBottom();
+        DeadlockTrendChart.Plot.Axes.DateTimeTicksBottomDateChange();
         DeadlockTrendChart.Plot.Axes.SetLimitsX(rangeStart.ToOADate(), rangeEnd.ToOADate());
         ReapplyAxisColors(DeadlockTrendChart);
         DeadlockTrendChart.Plot.YLabel("Deadlocks");
@@ -2520,7 +2520,7 @@ private void UpdateCurrentWaitsDurationChart(List<WaitingTaskTrendPoint> data, i
             zeroLine.LegendText = "Current Waits";
             zeroLine.Color = ScottPlot.Color.FromHex("#4FC3F7");
             zeroLine.MarkerSize = 0;
-            CurrentWaitsDurationChart.Plot.Axes.DateTimeTicksBottom();
+            CurrentWaitsDurationChart.Plot.Axes.DateTimeTicksBottomDateChange();
             CurrentWaitsDurationChart.Plot.Axes.SetLimitsX(rangeStart.ToOADate(), rangeEnd.ToOADate());
             ReapplyAxisColors(CurrentWaitsDurationChart);
             CurrentWaitsDurationChart.Plot.YLabel("Total Wait Duration (ms)");
@@ -2550,7 +2550,7 @@ private void UpdateCurrentWaitsDurationChart(List<WaitingTaskTrendPoint> data, i
             if (values.Length > 0) globalMax = Math.Max(globalMax, values.Max());
         }
 
-        CurrentWaitsDurationChart.Plot.Axes.DateTimeTicksBottom();
+        CurrentWaitsDurationChart.Plot.Axes.DateTimeTicksBottomDateChange();
         CurrentWaitsDurationChart.Plot.Axes.SetLimitsX(rangeStart.ToOADate(), rangeEnd.ToOADate());
         ReapplyAxisColors(CurrentWaitsDurationChart);
         CurrentWaitsDurationChart.Plot.YLabel("Total Wait Duration (ms)");
@@ -2585,7 +2585,7 @@ private void UpdateCurrentWaitsBlockedChart(List<BlockedSessionTrendPoint> data,
             zeroLine.LegendText = "Blocked Sessions";
             zeroLine.Color = ScottPlot.Color.FromHex("#E57373");
             zeroLine.MarkerSize = 0;
-            CurrentWaitsBlockedChart.Plot.Axes.DateTimeTicksBottom();
+            CurrentWaitsBlockedChart.Plot.Axes.DateTimeTicksBottomDateChange();
             CurrentWaitsBlockedChart.Plot.Axes.SetLimitsX(rangeStart.ToOADate(), rangeEnd.ToOADate());
             ReapplyAxisColors(CurrentWaitsBlockedChart);
             CurrentWaitsBlockedChart.Plot.YLabel("Blocked Sessions");
@@ -2615,7 +2615,7 @@ private void UpdateCurrentWaitsBlockedChart(List<BlockedSessionTrendPoint> data,
             if (values.Length > 0) globalMax = Math.Max(globalMax, values.Max());
         }
 
-        CurrentWaitsBlockedChart.Plot.Axes.DateTimeTicksBottom();
+        CurrentWaitsBlockedChart.Plot.Axes.DateTimeTicksBottomDateChange();
         CurrentWaitsBlockedChart.Plot.Axes.SetLimitsX(rangeStart.ToOADate(), rangeEnd.ToOADate());
         ReapplyAxisColors(CurrentWaitsBlockedChart);
         CurrentWaitsBlockedChart.Plot.YLabel("Blocked Sessions");
@@ -2642,7 +2642,7 @@ private void UpdateQueryDurationTrendChart(List<QueryTrendPoint> data)
         plot.Color = ScottPlot.Color.FromHex("#4FC3F7");
         _queryDurationTrendHover?.Add(plot, "Query Duration");
 
-        QueryDurationTrendChart.Plot.Axes.DateTimeTicksBottom();
+        QueryDurationTrendChart.Plot.Axes.DateTimeTicksBottomDateChange();
         ReapplyAxisColors(QueryDurationTrendChart);
         QueryDurationTrendChart.Plot.YLabel("Duration (ms/sec)");
         SetChartYLimitsWithLegendPadding(QueryDurationTrendChart, 0, values.Max());
@@ -2666,7 +2666,7 @@ private void UpdateProcDurationTrendChart(List<QueryTrendPoint> data)
         plot.Color = ScottPlot.Color.FromHex("#81C784");
         _procDurationTrendHover?.Add(plot, "Procedure Duration");
 
-        ProcDurationTrendChart.Plot.Axes.DateTimeTicksBottom();
+        ProcDurationTrendChart.Plot.Axes.DateTimeTicksBottomDateChange();
         ReapplyAxisColors(ProcDurationTrendChart);
         ProcDurationTrendChart.Plot.YLabel("Duration (ms/sec)");
         SetChartYLimitsWithLegendPadding(ProcDurationTrendChart, 0, values.Max());
@@ -2690,7 +2690,7 @@ private void UpdateQueryStoreDurationTrendChart(List<QueryTrendPoint> data)
         plot.Color = ScottPlot.Color.FromHex("#FFB74D");
         _queryStoreDurationTrendHover?.Add(plot, "Query Store Duration");
 
-        QueryStoreDurationTrendChart.Plot.Axes.DateTimeTicksBottom();
+        QueryStoreDurationTrendChart.Plot.Axes.DateTimeTicksBottomDateChange();
         ReapplyAxisColors(QueryStoreDurationTrendChart);
         QueryStoreDurationTrendChart.Plot.YLabel("Duration (ms/sec)");
         SetChartYLimitsWithLegendPadding(QueryStoreDurationTrendChart, 0, values.Max());
@@ -2855,7 +2855,7 @@ private void UpdateExecutionCountTrendChart(List<QueryTrendPoint> data)
         plot.Color = ScottPlot.Color.FromHex("#BA68C8");
         _executionCountTrendHover?.Add(plot, "Executions");
 
-        ExecutionCountTrendChart.Plot.Axes.DateTimeTicksBottom();
+        ExecutionCountTrendChart.Plot.Axes.DateTimeTicksBottomDateChange();
         ReapplyAxisColors(ExecutionCountTrendChart);
         ExecutionCountTrendChart.Plot.YLabel("Executions/sec");
         SetChartYLimitsWithLegendPadding(ExecutionCountTrendChart, 0, values.Max());
@@ -3415,7 +3415,7 @@ private async System.Threading.Tasks.Task UpdateWaitStatsChartFromPickerAsync()
                 if (values.Length > 0) globalMax = Math.Max(globalMax, values.Max());
             }
 
-            WaitStatsChart.Plot.Axes.DateTimeTicksBottom();
+            WaitStatsChart.Plot.Axes.DateTimeTicksBottomDateChange();
             DateTime rangeStart, rangeEnd;
             if (IsCustomRange && fromDate.HasValue && toDate.HasValue)
             {
@@ -3579,7 +3579,7 @@ private async System.Threading.Tasks.Task UpdateMemoryClerksChartFromPickerAsync
                 }
             }
 
-            MemoryClerksChart.Plot.Axes.DateTimeTicksBottom();
+            MemoryClerksChart.Plot.Axes.DateTimeTicksBottomDateChange();
             ReapplyAxisColors(MemoryClerksChart);
             MemoryClerksChart.Plot.YLabel("Memory (MB)");
             SetChartYLimitsWithLegendPadding(MemoryClerksChart, 0, globalMax > 0 ? globalMax : 100);
@@ -3773,7 +3773,7 @@ private async System.Threading.Tasks.Task UpdatePerfmonChartFromPickerAsync()
                 if (values.Length > 0) globalMax = Math.Max(globalMax, values.Max());
             }
 
-            PerfmonChart.Plot.Axes.DateTimeTicksBottom();
+            PerfmonChart.Plot.Axes.DateTimeTicksBottomDateChange();
             DateTime rangeStart, rangeEnd;
             if (IsCustomRange && fromDate.HasValue && toDate.HasValue)
             {
@@ -3913,6 +3913,8 @@ private static void ApplyTheme(ScottPlot.WPF.WpfPlot chart)
         chart.Plot.Axes.Left.TickLabelStyle.ForeColor = textColor;
         chart.Plot.Axes.Bottom.Label.ForeColor = textColor;
         chart.Plot.Axes.Left.Label.ForeColor = textColor;
+        chart.Plot.Axes.Bottom.TickLabelStyle.FontSize = 13;
+        chart.Plot.Axes.Left.TickLabelStyle.FontSize = 13;
 
         // Set the WPF control Background to match so no white flash appears before ScottPlot's render loop fires
         chart.Background = new System.Windows.Media.SolidColorBrush(System.Windows.Media.Color.FromRgb(figureBackground.R, figureBackground.G, figureBackground.B));
@@ -3970,6 +3972,8 @@ private static void ReapplyAxisColors(ScottPlot.WPF.WpfPlot chart)
         chart.Plot.Axes.Left.TickLabelStyle.ForeColor = textColor;
         chart.Plot.Axes.Bottom.Label.ForeColor = textColor;
         chart.Plot.Axes.Left.Label.ForeColor = textColor;
+        chart.Plot.Axes.Bottom.TickLabelStyle.FontSize = 13;
+        chart.Plot.Axes.Left.TickLabelStyle.FontSize = 13;
     }
 
     /// <summary>
@@ -5309,7 +5313,7 @@ private void UpdateCollectorDurationChart(List<CollectionLogRow> data)
             colorIdx++;
         }
 
-        CollectorDurationChart.Plot.Axes.DateTimeTicksBottom();
+        CollectorDurationChart.Plot.Axes.DateTimeTicksBottomDateChange();
         ReapplyAxisColors(CollectorDurationChart);
         CollectorDurationChart.Plot.YLabel("Duration (ms)");
         CollectorDurationChart.Plot.Axes.AutoScale();
diff --git a/Lite/Helpers/AxesExtensions.cs b/Lite/Helpers/AxesExtensions.cs
new file mode 100644
index 0000000..fb19a60
--- /dev/null
+++ b/Lite/Helpers/AxesExtensions.cs
@@ -0,0 +1,45 @@
+using System;
+using System.Globalization;
+using System.Text.RegularExpressions;
+
+namespace PerformanceMonitorLite.Helpers;
+
+internal static class AxesExtensions
+{
+    /// <summary>Culture's short-date pattern with the year component removed (e.g. "M/d" en-US, "dd/MM" en-GB, "dd.MM" de-DE).</summary>
+    private static readonly string MonthDayPattern = BuildMonthDayPattern();
+
+    private static string BuildMonthDayPattern()
+    {
+        var p = CultureInfo.CurrentCulture.DateTimeFormat.ShortDatePattern;
+        p = Regex.Replace(p, @"y+", "");
+        p = Regex.Replace(p, @"^[\s/.\-]+|[\s/.\-]+$", "");
+        p = Regex.Replace(p, @"([/.\-\s])\1+", "$1");
+        return string.IsNullOrWhiteSpace(p) ? "M/d" : p;
+    }
+
+    /// <summary>
+    /// Like <c>DateTimeTicksBottom()</c>, but prints the date line on only the first tick
+    /// and on ticks where the date component changes. All other ticks show time-only.
+    /// Date and time formats follow the current culture.
+    /// </summary>
+    public static void DateTimeTicksBottomDateChange(this ScottPlot.AxisManager axes)
+    {
+        axes.DateTimeTicksBottom();
+        if (axes.Bottom.TickGenerator is ScottPlot.TickGenerators.DateTimeAutomatic gen)
+        {
+            DateTime? lastDate = null;
+            var culture = CultureInfo.CurrentCulture;
+            gen.LabelFormatter = dt =>
+            {
+                var time = dt.ToString("t", culture);
+                if (lastDate is null || dt.Date != lastDate.Value)
+                {
+                    lastDate = dt.Date;
+                    return $"{dt.ToString(MonthDayPattern, culture)}\n{time}";
+                }
+                return time;
+            };
+        }
+    }
+}
diff --git a/Lite/Themes/CoolBreezeTheme.xaml b/Lite/Themes/CoolBreezeTheme.xaml
index d22edec..010d8a8 100644
--- a/Lite/Themes/CoolBreezeTheme.xaml
+++ b/Lite/Themes/CoolBreezeTheme.xaml
@@ -595,6 +595,40 @@
         </Setter>
     </Style>
 
+    <!-- Sub-tab style: thin accent underline instead of filled background, so the hierarchy
+         reads at a glance when a main tab's sub-tabs are shown alongside the main tab bar. -->
+    <Style x:Key="SubTabItemStyle" TargetType="TabItem">
+        <Setter Property="Background" Value="Transparent"/>
+        <Setter Property="Foreground" Value="{StaticResource ForegroundDimBrush}"/>
+        <Setter Property="BorderThickness" Value="0"/>
+        <Setter Property="Padding" Value="10,6"/>
+        <Setter Property="Margin" Value="0,0,4,0"/>
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="TabItem">
+                    <Border x:Name="border"
+                            Background="{TemplateBinding Background}"
+                            BorderBrush="{StaticResource AccentBrush}"
+                            BorderThickness="0"
+                            Padding="{TemplateBinding Padding}">
+                        <ContentPresenter ContentSource="Header"
+                                          HorizontalAlignment="Center"
+                                          VerticalAlignment="Center"/>
+                    </Border>
+                    <ControlTemplate.Triggers>
+                        <Trigger Property="IsSelected" Value="True">
+                            <Setter TargetName="border" Property="BorderThickness" Value="0,0,0,2"/>
+                            <Setter Property="Foreground" Value="{StaticResource ForegroundBrush}"/>
+                        </Trigger>
+                        <Trigger Property="IsMouseOver" Value="True">
+                            <Setter TargetName="border" Property="Background" Value="{StaticResource BackgroundLighterBrush}"/>
+                        </Trigger>
+                    </ControlTemplate.Triggers>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
     <!-- ============================================ -->
     <!-- DataGrid Style                               -->
     <!-- ============================================ -->
diff --git a/Lite/Themes/DarkTheme.xaml b/Lite/Themes/DarkTheme.xaml
index 3d64f59..869af3d 100644
--- a/Lite/Themes/DarkTheme.xaml
+++ b/Lite/Themes/DarkTheme.xaml
@@ -595,6 +595,40 @@
         </Setter>
     </Style>
 
+    <!-- Sub-tab style: thin accent underline instead of filled background, so the hierarchy
+         reads at a glance when a main tab's sub-tabs are shown alongside the main tab bar. -->
+    <Style x:Key="SubTabItemStyle" TargetType="TabItem">
+        <Setter Property="Background" Value="Transparent"/>
+        <Setter Property="Foreground" Value="{StaticResource ForegroundDimBrush}"/>
+        <Setter Property="BorderThickness" Value="0"/>
+        <Setter Property="Padding" Value="10,6"/>
+        <Setter Property="Margin" Value="0,0,4,0"/>
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="TabItem">
+                    <Border x:Name="border"
+                            Background="{TemplateBinding Background}"
+                            BorderBrush="{StaticResource AccentBrush}"
+                            BorderThickness="0"
+                            Padding="{TemplateBinding Padding}">
+                        <ContentPresenter ContentSource="Header"
+                                          HorizontalAlignment="Center"
+                                          VerticalAlignment="Center"/>
+                    </Border>
+                    <ControlTemplate.Triggers>
+                        <Trigger Property="IsSelected" Value="True">
+                            <Setter TargetName="border" Property="BorderThickness" Value="0,0,0,2"/>
+                            <Setter Property="Foreground" Value="{StaticResource ForegroundBrush}"/>
+                        </Trigger>
+                        <Trigger Property="IsMouseOver" Value="True">
+                            <Setter TargetName="border" Property="Background" Value="{StaticResource BackgroundLighterBrush}"/>
+                        </Trigger>
+                    </ControlTemplate.Triggers>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
     <!-- ============================================ -->
     <!-- DataGrid Style                               -->
     <!-- ============================================ -->
diff --git a/Lite/Themes/LightTheme.xaml b/Lite/Themes/LightTheme.xaml
index e47e241..e990830 100644
--- a/Lite/Themes/LightTheme.xaml
+++ b/Lite/Themes/LightTheme.xaml
@@ -595,6 +595,40 @@
         </Setter>
     </Style>
 
+    <!-- Sub-tab style: thin accent underline instead of filled background, so the hierarchy
+         reads at a glance when a main tab's sub-tabs are shown alongside the main tab bar. -->
+    <Style x:Key="SubTabItemStyle" TargetType="TabItem">
+        <Setter Property="Background" Value="Transparent"/>
+        <Setter Property="Foreground" Value="{StaticResource ForegroundDimBrush}"/>
+        <Setter Property="BorderThickness" Value="0"/>
+        <Setter Property="Padding" Value="10,6"/>
+        <Setter Property="Margin" Value="0,0,4,0"/>
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="TabItem">
+                    <Border x:Name="border"
+                            Background="{TemplateBinding Background}"
+                            BorderBrush="{StaticResource AccentBrush}"
+                            BorderThickness="0"
+                            Padding="{TemplateBinding Padding}">
+                        <ContentPresenter ContentSource="Header"
+                                          HorizontalAlignment="Center"
+                                          VerticalAlignment="Center"/>
+                    </Border>
+                    <ControlTemplate.Triggers>
+                        <Trigger Property="IsSelected" Value="True">
+                            <Setter TargetName="border" Property="BorderThickness" Value="0,0,0,2"/>
+                            <Setter Property="Foreground" Value="{StaticResource ForegroundBrush}"/>
+                        </Trigger>
+                        <Trigger Property="IsMouseOver" Value="True">
+                            <Setter TargetName="border" Property="Background" Value="{StaticResource BackgroundLighterBrush}"/>
+                        </Trigger>
+                    </ControlTemplate.Triggers>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
     <!-- ============================================ -->
     <!-- DataGrid Style                               -->
     <!-- ============================================ -->