body{margin:0;font-family:Arial,sans-serif;background-color:#f5f5f5}.logo{display:block;margin:20px auto;width:150px}.login-container,.signup-container{display:flex;flex-direction:column;align-items:center;justify-content:center;height:80vh}button{margin-top:10px;padding:10px 20px;cursor:pointer}