Design updates

timetracker.Client/Components/Pages/Home.razor

@@ -21,7 +21,7 @@ else
 
         @* ── Wochen-Header ── *@
         <MudPaper Elevation="4" Class="pa-5 rounded-xl"
-                  Style="background: linear-gradient(135deg, #3F51B5 0%, #1A237E 100%); color: white;">
+                  Style="background: #1E293B; color: white;">
             <MudStack Row="true" AlignItems="AlignItems.Center" Justify="Justify.SpaceBetween">
                 <MudIconButton Icon="@Icons.Material.Filled.ChevronLeft"
                                Style="color:white" Size="Size.Large" OnClick="PrevWeek" />
@@ -95,7 +95,7 @@ else
                 @* ── Arbeitstag: vollständige Karte ── *@
                 <MudCard @key="@day.Date" Elevation="@(isToday ? 6 : 2)" Class="rounded-xl"
                          Style="@($"border-left: 4px solid {borderColor};")">
-                    <MudCardHeader Style="@(isToday ? "background: linear-gradient(90deg, rgba(63,81,181,0.07) 0%, transparent 100%);" : "")">
+                    <MudCardHeader Style="@(isToday ? "background: linear-gradient(90deg, rgba(14,165,233,0.07) 0%, transparent 100%);" : "")">
                         <CardHeaderContent>
                             <MudStack Row="true" AlignItems="AlignItems.Center" Justify="Justify.SpaceBetween">
                                 <MudStack Spacing="0">
@@ -270,7 +270,7 @@ else
 
         @* ── Wochensumme ── *@
         <MudPaper Elevation="4" Class="pa-5 rounded-xl"
-                  Style="background: linear-gradient(135deg, #1A237E 0%, #283593 100%); color:white;">
+                  Style="background: #0F172A; color:white;">
             <MudStack Row="true" AlignItems="AlignItems.Center" Spacing="2" Class="mb-4">
                 <MudIcon Icon="@Icons.Material.Filled.Summarize" Style="color:rgba(255,255,255,0.8)" />
                 <MudText Typo="Typo.h6" Style="color:white; font-weight:600">Wochensumme</MudText>