Theme development

I am trying to compile a style sheet using the instructions given at this link:

I seem to be getting the errors such as:

I'm sure this has been asked but I'm not finding it so hopefully someone can answer quickly. Our site uses the Bartik Plus theme and we've been getting complaints that the font size is too small on the drop down menus when you hover over the main tabs. From research I have done, it appears that can't be easily changed without switching themes?

Hi all

Having a small issue trying to add a class onto an existing div wrapper outputted from the field_collection module.

<div class="field-collection-container">
  <div class="field-name-job-photos">
    <div class="field-items">

I would like to add a class onto:<div class="field-items">

So I have something like:<div class="field-items extra-class">

Hello Drupal Community,

I was trying to edit my view theme with php i get the file
views-view-field--homepage-banner--block--field-site-image.tpl.php
and try to print view fields but values come's empty? any ideas?

Code example:

I'm looking for a good base theme for Drupal 8. But i can't find many information about it.

Are there good base themes available? Or is theming based on a base theme no longer necessary/recommended for D8?

Hello,
When viewing this site on a mobile device the sidebar region is displaying before the content region. It appears the region order is correct in page.tpl.php file. Any suggestions how I can get this to display correctly on a mobile device?
Here is an example.
http://njorganizer.cyclonewebdesign.com/about