Hi,
Anyone can help me to remove  white border of below VF Page.



I have tried to modify slds-card class with no border but it is not applying to this page.





any suggestions would be helpful.

I am not able to get through this challenge. 
I logged in through SOAPUI and used the session id to create an account. The account gets created and returns success. However when I try to validate the challenge in trailhead, it gives me an error - 

Challenge Not yet complete... here's what's wrong: 
It doesn't appear that you have logged in using SoapUI.

I am not sure what did I miss out.