add css module compile rule and a login guard

Change-Id: I5c99e236f92d3b6c6d0060b36cf90a252df93a95
diff --git a/src/global.css b/src/global.css
new file mode 100644
index 0000000..7dfec7b
--- /dev/null
+++ b/src/global.css
@@ -0,0 +1,12 @@
+body {
+    margin: 0;
+    padding: 0;
+    height: 100vh;
+    width: 100vw;
+    background-color: #e6f7ff; /* Light blue background */
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    font-family: Arial, sans-serif; /* Optional: Set a global font */
+    box-sizing: border-box;
+}
\ No newline at end of file