How to modity the body width of the template or a theme?

I have been trying for days to have my main-body width increased but no success/

I try custom css but not working.
I don't witch block to modify.

I follow the instruction here:
docs.joomlaux.com/templates/jux_travel/#...mplate_customization

it says: ◾ Step 1: Select Theme: all theme will be listed here , select theme you want to customize

But only default theme is there.

Please help me

Thanks

Hi Keke,
Thanks for contacting us and choosing our product!
please describe in detail the problem you're having, and send us the site and your account, we will check for you in the shortest time. Thanks
*********
Best Regards,
-- NT--

I have one script that I am not able to set the width to fit into the template so I want to increase the width of no-sidebar them to fit the scrip.
You can see here: www.skytravel.co.za/index.php/flights#/?from_mobile=true

www.skytravel.co.za/administrator/


Look at the image I am sure if you increase the width of the template it will fix it the centre.



Also how can I change the Dropdown menu background colour.

Thanks
Kenny

Hi Keke,
Thank you for feedback us.
Want to edit any css on site please in template / jux_travel / css / custom.css
for example, you could write
.container .row {
margin-left: -50px;
}
You are not allowed to edit directly in the default css file.
Hope this help!

*********
Best Regards,
-- NT--

Thank you for your reply.

But I want to do that only for the no-sidebar temple.
If I apply that it will change on all templates.
Also you have given me the example for margin but I want and example for body width.

can I try:
.container .row {
width 1000px;
}
?????

Please This is urgent I have messed my site up trying things.

Thanks

This option is not working!

it pouches everything else on the left.

I am not sure don't you guys don't the main-body class

Please help me.

Thanks

Hi Keke,
I checked your site not see what's shown in the picture. please set up I will try to help you style.
the problem can be difficult when you install some other stuff.
*********
Best Regards,
-- NT--