addition to new update in mobile phones only

Looks great now thank you jacob for the big favour, just wondering if how can I add an arrow down? Could be similar to the mobile menu arrows but I much rather one that has this shape https://fpimage.cdnpk.net/free-icon/thin-down-arrow_318-11165.jpg

thank you jacob!
that work really good just one last question regarding this

I was wondering how to do it like this https://goo.gl/photos/P1Xsdt4dQhLgRYyw9

I just want to align the arrow to the right like in the mobile menu

Adding margin and padding will not work because the website is responsive, I tried aligning it but no luck. In case it helps I took the idea from thenextweb

• This reply was modified 5 y, 4 mo by  Erick.

• This reply was modified 5 y, 4 mo by  Erick.

That additional code didnt work

see what i mean Ill include to screen shots of different web browser sizes

https://goo.gl/photos/Np1SyxLRkVksr6hz7

https://goo.gl/photos/Z6FfeBDMuNCFLo9M7

also this is the last thing to make it look the way I want

I have been trying even before the update to make this lines
https://goo.gl/photos/31eFQL4gwjrG57cv9

extend across the whole page. only on mobile ofcourse. But eveytime I tried it changes all the other margins.

Also the lines should only change the main entry content not the sidebar lines.