diff --git a/backend/routers/projects.py b/backend/routers/projects.py
index 5349788..29e71cd 100644
--- a/backend/routers/projects.py
+++ b/backend/routers/projects.py
@@ -2038,6 +2038,7 @@ async def generate_excel_report(
         import openpyxl
         from openpyxl.chart import LineChart, Reference
         from openpyxl.chart.label import DataLabelList
+        from openpyxl.chart.shapes import GraphicalProperties
         from openpyxl.styles import Font, Alignment, Border, Side, PatternFill
         from openpyxl.utils import get_column_letter
     except ImportError:
@@ -2340,6 +2341,10 @@ async def generate_excel_report(
         chart.series[2].graphicalProperties.line.solidFill = "0070C0"
         chart.series[2].graphicalProperties.line.width = 19050
 
+    _plot_border = GraphicalProperties()
+    _plot_border.ln.solidFill = "000000"
+    _plot_border.ln.w = 12700
+    chart.plot_area.spPr = _plot_border
     ws.add_chart(chart, "H4")
 
     # --- Stats table: note at I28-I29, headers at I31, data rows 32-34 ---
@@ -2679,6 +2684,7 @@ async def generate_report_from_preview(
     try:
         import openpyxl
         from openpyxl.chart import LineChart, Reference
+        from openpyxl.chart.shapes import GraphicalProperties
         from openpyxl.styles import Font, Alignment, Border, Side, PatternFill
         from openpyxl.utils import get_column_letter
     except ImportError:
@@ -2821,6 +2827,10 @@ async def generate_report_from_preview(
             chart.series[1].graphicalProperties.line.width = 19050
             chart.series[2].graphicalProperties.line.solidFill = "0070C0"
             chart.series[2].graphicalProperties.line.width = 19050
+        _plot_border = GraphicalProperties()
+        _plot_border.ln.solidFill = "000000"
+        _plot_border.ln.w = 12700
+        chart.plot_area.spPr = _plot_border
         ws.add_chart(chart, "H4")
 
     # --- Stats block starting at I28 ---
@@ -2957,6 +2967,7 @@ async def generate_combined_excel_report(
     try:
         import openpyxl
         from openpyxl.chart import LineChart, Reference
+        from openpyxl.chart.shapes import GraphicalProperties
         from openpyxl.styles import Font, Alignment, Border, Side, PatternFill
         from openpyxl.utils import get_column_letter
     except ImportError:
@@ -3163,6 +3174,10 @@ async def generate_combined_excel_report(
             chart.series[2].graphicalProperties.line.solidFill = "0070C0"
             chart.series[2].graphicalProperties.line.width = 19050
 
+        _plot_border = GraphicalProperties()
+        _plot_border.ln.solidFill = "000000"
+        _plot_border.ln.w = 12700
+        chart.plot_area.spPr = _plot_border
         ws.add_chart(chart, "H4")
 
         # Stats table: note at I28-I29, headers at I31, data rows 32-34, border row 35
@@ -3569,6 +3584,7 @@ async def generate_combined_from_preview(
     try:
         import openpyxl
         from openpyxl.chart import LineChart, Reference
+        from openpyxl.chart.shapes import GraphicalProperties
         from openpyxl.styles import Font, Alignment, Border, Side, PatternFill
         from openpyxl.utils import get_column_letter
         from openpyxl.worksheet.properties import PageSetupProperties
@@ -3736,6 +3752,10 @@ async def generate_combined_from_preview(
             chart.series[2].graphicalProperties.line.solidFill = "0070C0"
             chart.series[2].graphicalProperties.line.width = 19050
 
+        _plot_border = GraphicalProperties()
+        _plot_border.ln.solidFill = "000000"
+        _plot_border.ln.w = 12700
+        chart.plot_area.spPr = _plot_border
         ws.add_chart(chart, "H4")
 
         hdr_fill_tbl = PatternFill(start_color="F2F2F2", end_color="F2F2F2", fill_type="solid")
diff --git a/templates/combined_report_wizard.html b/templates/combined_report_wizard.html
index a6c213f..264f185 100644
--- a/templates/combined_report_wizard.html
+++ b/templates/combined_report_wizard.html
@@ -75,7 +75,7 @@
         </div>
 
         <!-- Sessions Card -->
-        <div class="bg-white dark:bg-slate-800 rounded-lg shadow-sm border border-gray-200 dark:border-gray-700 p-6">
+        <div class="bg-white dark:bg-slate-800 rounded-lg shadow-sm border border-gray-200 dark:border-gray-700 p-6 overflow-hidden">
             <div class="flex items-center justify-between mb-1">
                 <h2 class="text-lg font-semibold text-gray-900 dark:text-white">Monitoring Sessions</h2>
                 <div class="flex gap-3 text-sm">