add project structure

app/static/style.css

@@ -0,0 +1,20 @@
+body {
+    margin: 0;
+    font-family: Arial, sans-serif;
+    background: #f4f4f4;
+    color: #222;
+}
+
+.container {
+    max-width: 720px;
+    margin: 48px auto;
+    padding: 24px;
+    background: #fff;
+    border-radius: 12px;
+    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
+}
+
+h1 {
+    margin-top: 0;
+}
+