feat: Update Control Panel color scheme for improved contrast and aesthetics

client/src/components/ControlPanel.css

@@ -2,8 +2,8 @@
   height: 100%;
   display: flex;
   flex-direction: column;
-  background: #ffffff;
+  background: #111827;
-  color: #1f2937;
+  color: #e5e7eb;
   font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
 }
 
@@ -12,15 +12,15 @@
   justify-content: space-between;
   align-items: center;
   padding: 1rem 1.5rem;
-  background: #ffffff;
+  background: #1f2937;
-  border-bottom: 1px solid #e5e7eb;
+  border-bottom: 1px solid #374151;
-  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
+  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
 }
 
 .panel-header h1 {
   font-size: 1.25rem;
   font-weight: 600;
-  color: #111827;
+  color: #f9fafb;
   letter-spacing: -0.025em;
 }
 
@@ -77,10 +77,10 @@
 
 .turtle-list {
   width: 100%;
-  border-bottom: 1px solid #e5e7eb;
+  border-bottom: 1px solid #374151;
   display: flex;
   flex-direction: row;
-  background: #f9fafb;
+  background: #1f2937;
   overflow-x: auto;
   padding: 0.75rem;
   gap: 0.75rem;
@@ -103,17 +103,17 @@
 }
 
 .turtle-cards::-webkit-scrollbar-track {
-  background: #f3f4f6;
+  background: #1f2937;
   border-radius: 3px;
 }
 
 .turtle-cards::-webkit-scrollbar-thumb {
-  background: #d1d5db;
+  background: #4b5563;
   border-radius: 3px;
 }
 
 .turtle-cards::-webkit-scrollbar-thumb:hover {
-  background: #9ca3af;
+  background: #6b7280;
 }
 
 .empty-state {
@@ -138,8 +138,8 @@
 }
 
 .turtle-card {
-  background: #ffffff;
+  background: #1f2937;
-  border: 2px solid #e5e7eb;
+  border: 2px solid #374151;
   border-radius: 0.5rem;
   padding: 0.875rem;
   cursor: pointer;
@@ -154,9 +154,9 @@
 }
 
 .turtle-card:hover {
-  border-color: #3b82f6;
+  border-color: #60a5fa;
   transform: translateY(-2px);
-  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.15);
+  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
 }
 
 .turtle-card:hover::before {
@@ -164,9 +164,9 @@
 }
 
 .turtle-card.selected {
-  border-color: #3b82f6;
+  border-color: #60a5fa;
-  background: #eff6ff;
+  background: #1e3a5f;
-  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
+  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
 }
 
 .turtle-card.selected::before {
@@ -179,13 +179,13 @@
   align-items: center;
   margin-bottom: 0.625rem;
   padding-bottom: 0.625rem;
-  border-bottom: 1px solid #e5e7eb;
+  border-bottom: 1px solid #374151;
 }
 
 .turtle-header h3 {
   font-size: 0.875rem;
   font-weight: 700;
-  color: #111827;
+  color: #f9fafb;
   display: flex;
   align-items: center;
   gap: 0.375rem;
@@ -217,13 +217,13 @@
   align-items: center;
   font-size: 0.75rem;
   padding: 0.375rem;
-  background: #f9fafb;
+  background: #111827;
   border-radius: 0.25rem;
-  border: 1px solid #e5e7eb;
+  border: 1px solid #374151;
 }
 
 .turtle-stats .label {
-  color: #6b7280;
+  color: #9ca3af;
   font-weight: 500;
   display: flex;
   align-items: center;
@@ -231,7 +231,7 @@
 }
 
 .turtle-stats .value {
-  color: #111827;
+  color: #f9fafb;
   font-weight: 600;
   font-family: 'Courier New', monospace;
   font-size: 0.75rem;
@@ -241,7 +241,7 @@
   flex: 1;
   padding: 1.5rem;
   overflow-y: auto;
-  background: #ffffff;
+  background: #111827;
 }
 
 .turtle-details::-webkit-scrollbar {
@@ -249,17 +249,17 @@
 }
 
 .turtle-details::-webkit-scrollbar-track {
-  background: #f3f4f6;
+  background: #1f2937;
   border-radius: 4px;
 }
 
 .turtle-details::-webkit-scrollbar-thumb {
-  background: #d1d5db;
+  background: #4b5563;
   border-radius: 4px;
 }
 
 .turtle-details::-webkit-scrollbar-thumb:hover {
-  background: #9ca3af;
+  background: #6b7280;
 }
 
 .turtle-details.empty {