i have problem related to image size. when i post your code in my CSS, it's look nice if i access by mobile phone. but the image is so small if i access by computer. here is my site example: http://khoivanphong.com/forum/61-46-1 is there anyway that makes my image has flexible size. ex, it fits size in forum page both accessing by phone & computer. when i click on the image, it's bigger to see. hope to hear you soon, thank you very much.