hi,
i tried a lot! but cant able to find the css.

how will i strech the width, of user register form so that input box form field will fit in that user form,
input box is reflecting from cdn i cant customize that,

example form uploaded below

try to find this rule inside the style.css file:

#i-forms .box {
and set the max-width per your wish eg

#i-forms .box {
    width: 100%;
    max-width: 640px;
    display: inline-block;
    margin: 0 auto;
}

 
thanks a lot pitbull,