Survey Form, took a while

Hey everyone ! just finished this one :

is there anything improvable ?
any feedback negative or positive would be appreciated !

what are the functions of and what do they do?

 -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;

So, nice design and great work, but imagine if user doesn’t have a mouse and he navigates the site using the keyboard. You are also need to foresee such cases. So add :focus state to your css.