1. If you are willing to customize checkout purely with your design .Please go to “Dashboard-> woocommerce->checkout layouts->General settings “.
2. Select “custom layout” from “checkout page layout” dropdown.
3. It will open a text editor to customize your checkout page. For each different section there are some predefined variable. For example if you want to implement payment-method form then call “!!cclw_payment!!” .You can wrap this variable with your own html.
4.Here are some other predefined variables.
5. To use same headers as the plugin does use <h3 class=”border_html”>Billing header</h3>
6. For any custom button use class “cclw_button” for same design.