if i use the grid system of bootstrap and i put a button in the last elem of the line (12/12) when i resize the limit for resize is before the end of the button so my parent div cut the buttons before to reorganize . step 1 (grid normal): https://drive.google.com/file/d/0B65L8tQY-iIWUW9uZnR0ZkhRTmM/view?usp=sharing step 2 (moment of problem): https://drive.google.com/file/d/0B65L8tQY-iIWMWdFLThjUGRBLUk/view?usp=sharing step 3 (grid reorganized): https://drive.google.com/file/d/0B65L8tQY-iIWSWhNZnpjLVgtV3c/view?usp=sharing

---