Add project files.

BudgetApp/Components/Layout/AuthLayout.razor.css

@@ -0,0 +1,16 @@
+.auth-layout {
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    min-height: 100vh;
+    background: linear-gradient(135deg, #052767 0%, #3a0647 100%);
+}
+
+.auth-container {
+    background: white;
+    border-radius: 12px;
+    padding: 2.5rem;
+    width: 100%;
+    max-width: 420px;
+    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
+}