Theme development

I am trying to override / hook theme_table from theme.inc.
My theme name is stat.
I have added following function to my theme template.php.

I'm trying out Drupal theme in D7 and after reading some posts about responsive, recommended Drupal themes, I installed the latest Xen for Drupal 7.
I'm a little familiar with SASS and got my gulp running, and don't see much docs of the recent versions. Due to streaming issues, I haven't been able to get through the latest John Albin video which is three years old.

I created a sub-theme through Drush and copied some of the template files from the parent theme.

My first Q is it normal for this D7 theme to have .twig files alongside the .scss files?

Templating using Foundation 6 sub-theme

html.html.twig

I am noticing some unexpected behavior where DIV sections are appear between head and body sections.

I am still totally new to Drupal. I have installed Drupal 8.3.2 so the latest Version. I have installed the Bootstrap Theme and activated it. I now want the Front Page to look different to the Layout of the other Pages meaning I would like:

A image slider, below that 3 Boxes with Content while 1 will be Latest News and 2 with static content below that a full width box then a Gallery with multiple images in 2 rows.

Hi
I have not used Drupal in some years and I am finding it a little hard to work out the CSS structure
Could someone please tell me what CSS document change and what ID to use to change the fontsize of the site.name.
I am using the business responsive theme
<div id="block-business-responsive-theme-branding" class="contextual-region site-branding block block-system block-system-branding-block">

Hi everyone,

I'm not pretty sure, if this question is correctly placed within the theming-forum – but since I hope, the fix for it is a little bit of Twig-Magic, I thought it would be =)

Since my forum- and even Google-search takes me more than one day without solving my problem now, I decided to ask you directly.