How to prevent vaadin default styles and how to increase width and height o

Hi All,

I am developing application using vaadin framework. I am new in vaadin framework.

I have lot of confusion in designing.

  1. I am creating layout to display loginform but it will come with some default styles. That styles collapsed my desgin.

Please any one say How can I remove or prevent that vaadin default styles.

  1. If I increase text-field height it automatically changed to text-area.

Please help any one How can I increase text-field height.