style(theme): light mode grey ground with white raised boxes, like v1

src/routes/layout.css

@@ -26,6 +26,14 @@
   --ff-series-8: #b63132;
 }
 
+:root:not(.dark) {
+  --cladd-bg: oklch(0.955 0.007 240);
+  --cladd-surface: oklch(1 0 0);
+  --cladd-surface-cut: oklch(0.955 0.005 240);
+  --cladd-bg-outline: oklch(0.88 0.008 240);
+  --cladd-outline: oklch(0.9 0.008 240);
+}
+
 .cladd-color-brand {
   --cladd-theme: #3c8dbc;
 }