Widen stat cards to full width, reduce height

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/components/datasets/protein/StatsPanel.css

@@ -1,14 +1,13 @@
 .stats-panel {
   display: grid;
-  grid-template-columns: repeat(2, minmax(0, 280px));
-  justify-content: center;
+  grid-template-columns: repeat(2, 1fr);
   gap: 15px;
   padding: 0;
 }
 
 .stat-card {
   background: white;
-  padding: 20px;
+  padding: 10px 20px;
   border-radius: 8px;
   box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
   text-align: center;
@@ -21,10 +20,10 @@
 }
 
 .stat-value {
-  font-size: 2rem;
+  font-size: 1.6rem;
   font-weight: 700;
   color: #2196f3;
-  margin-bottom: 5px;
+  margin-bottom: 2px;
 }
 
 .stat-label {