diff --git a/web/src/components/LoginForm.jsx b/web/src/components/LoginForm.jsx
index 6e0b93e..f8fa111 100644
--- a/web/src/components/LoginForm.jsx
+++ b/web/src/components/LoginForm.jsx
@@ -112,10 +112,9 @@ export default function LoginForm() {
                                 </Link>
                             </div>
 
-                            {/* ปุ่ม Submit: ปรับสี, corner, shadow ตามสไตล์ Contabo */}
                             <button
                                 type="submit"
-                                className={"btn mt-8 w-full bg-blue-500 text-white border-blue-500 hover:bg-blue-600 hover:border-blue-600 rounded-full shadow-lg transition duration-300 ease-in-out" + (loading ? " loading" : "")}
+                                className={"btn mt-8 w-full btn-primary rounded-md shadow-lg transition duration-300 ease-in-out" + (loading ? " loading" : "")}
                                 disabled={loading}
                             >
                                 {loading ? 'กำลังเข้าสู่ระบบ...' : 'เข้าสู่ระบบ'}