I cannot post a new ticket, it asks me to log in to envato indefinitely... I have 3 questions please

Hi,

I have 3 questions

1. How to enable transparent header? I did Customise - Page options - header transparency but it is still white, not transparent. Ref to screenshot 

2. How to remove popular posts widget on mobile? I inserted as custom css 

@media only screen and (max-width: 769px){     .penci-sidebar-content .widget.penci_popular_news_widget         display: none;     } }

but I still see it on my iPhone X at least.. am I doing it wrong?

3. is there any way I can allign my page centrally in spite of the existence of side bar? For instance check the 2nd and 3rd screenshots. I am using post template 3 and the title is alligned in the central. But then everything else is alligned to the left. Is there any way that my bio and related posts are alligned centrally (when there is no side bar)? 

Dear support team,

My question is straight forward. Instead of uploading a logo (I do not have any), I would like to type a piece of text and use it as a logo. 

I'd like to type something to replace the Soledad logo, similar to the native WP feature for logo. Is it possible and if yes, how?