Media query is not working

Hi, I am trying to use media queries for making tribute page responsive but media queries is not working. The mobile size 320px is working but the tablet size is not working. I tried Chrome and Firefox but it is same result. I already set up view port tag on the pen settings and I tried using different size of media queries but it will not change the size of picture and font.
I appreciate if you could help me.
Thank you,


How about changing device-width to width? I think you should also move the media queries for 320px at the top, before the media queries for 768px.

Thank you so much!! I could fix the issues!