style: Update background colors and button styles for improved UI consistency

client/src/App.css

@@ -73,11 +73,11 @@
 
 .map-container {
   position: relative;
-  background: #0a0e1a;
+  background: #2c2c2c;
 }
 
 .panel-container {
-  background: #0f172a;
+  background: #2c2c2c;
   overflow: hidden;
   display: flex;
   flex-direction: column;
@@ -87,34 +87,37 @@
   display: flex;
   gap: 0.25rem;
   padding: 0.5rem;
-  background: #1e293b;
-  border-bottom: 2px solid #334155;
+  background: #3b3b3b;
+  border-bottom: 3px solid #1a1a1a;
   overflow-x: auto;
   flex-shrink: 0;
 }
 
 .panel-tabs button {
   padding: 0.5rem 1rem;
-  border: none;
-  background: #334155;
-  color: #94a3b8;
-  border-radius: 0.375rem;
+  border: 2px solid #1a1a1a;
+  background: #5a5a5a;
+  color: #b0b0b0;
+  border-radius: 0;
   font-size: 0.875rem;
-  font-weight: 600;
+  font-weight: 700;
   cursor: pointer;
-  transition: all 0.2s;
+  transition: all 0.1s;
   white-space: nowrap;
+  font-family: 'Silkscreen', 'Courier New', monospace;
+  text-shadow: 1px 1px 0 #1a1a1a;
+  box-shadow: inset 0 -2px 0 #444, inset 0 2px 0 #777;
 }
 
 .panel-tabs button:hover {
-  background: #475569;
+  background: #6b6b6b;
   color: #e5e7eb;
 }
 
 .panel-tabs button.active {
-  background: #3b82f6;
+  background: #4a8c2a;
   color: white;
-  box-shadow: 0 0 8px rgba(59, 130, 246, 0.4);
+  box-shadow: inset 0 2px 0 #6ab04c, inset 0 -2px 0 #2d6b1a;
 }
 
 .panel-content-wrapper {