Hello Benardo,
Instead of the above code you added, please add the below code, But the flag and social links will go down. So, if you want to pull them above, try by reducing the width.

.site-logo {
    width: 100%;
    height: auto;
}

There is lots of blank space available around on the logo, may be that will causing the blur. Please make the logo exact width, to make it clear.
Regards,
Acme Supports

Hello Jonathan,
Thank you so much for purchasing our theme SuperMagPro. Please follow the theme documentation to know about how to setup theme. https://doc.acmethemes.com/supermagpro/
Hope this theme documentation will help you to setup and customize theme.

Best Regards,
Acme Supports

Hello Bernardo,
You have to change the width of class .site-logo. So, try adding the width on this class and put inside the Custom CSS field at customize.

Regards,
Acme Supports

Hello Bernardo,
Thank you so much for using our theme AcmeBlogPro. Based on your question, that plugin didn’t help to add language switcher flag near the social links. To add language switcher near the social links, you have to customize the theme. If you are familiar with WordPress codes, you can do it yourself or we recommend you to hire a customizer for it also.

Customization Request

If you need any help, post your query here.

Best Regards,
Acme Supports

Hello ChicagoMusicGuide,
Thanks for your question regarding page load time and site optimization. Please follow the site optimization technique like reduce page size, use cache plugin, Removing unwanted plugin, Empty Trash, Reduce Post Revisions/Drafts/Spam/Pingbacks and Trackbacks,Optimize Your Images for the Web, Enable Gzip Compression etc. This help to increase the load time of your site. Hope, this technique is really helpful for you.

Best Regards,
Acme Supports

Hello Mymarvelblog,
Thank you so much for using our theme. Please read this blog to make the site as demo, and you will also understand about the ID too. http://www.acmethemes.com/blog/2016/04/corporate-plus/
Hope this blog post will help you to solve your problem. If you have any query regarding our theme, please do write us.

Best regards,
Acme Supports

Hello Roj,
This feature is not available on the free version of theme. In our Pro version, you can Show/Hide author name on post and widgets. Besides this you can show/hide comments, date, category and can set the different color for different category too. You can find the difference here. http://www.acmethemes.com/themes/supermag/
All the field and options are changeable on pro version of theme, so we recommend you to use pro theme, although you can customize SuperMag theme as your need based on Child Theme approach if you are familiar with WordPress codes.
If you have any query regarding our theme, please write us.

Best Regards,
Acme Supports

Hello Roj,
Thank you for using our free theme and for your interest on our pro theme. As your requirement, you can show/hide author name details on each post. You can show/hide author on every widgets also. Besides this, there are lots of additional features available on theme. Please check difference here. http://www.acmethemes.com/themes/supermag/
If you have any questions regarding our theme, please do write here.

Best Regards,
Acme Supports