Chances for MS in CS Stanford

3.65 undergrad GPA from top 3 LAC, math major, 5 CS classes (with grades A-, A-, A, B+, B- ). I believe I will have very good rec letters. I expect a 330+ in GRE. My main question: Do I still stand a good chance without any research/industry experience in computer science? Do the B+ and B- grades in CS classes negatively affect my application in a substantial manner?

I believe your CS portfolio is important in this field.