Due to Google´s recent changes in their search index ranking I had to switch to a “more” mobile compatible theme (as an iOS user I personally really don´t care).
So here it is. In case you may ask why, here´s a brief explanation:
1.) Google decided that websites looking ugly on mobile devices will get a poorer ranking
2.) Nobody wants to fall down the index, so you´ve got to make your website look better on mobile devices (by Google standards)
3.) The mobile guide will help you with more information: https://developers.google.com/webmasters/mobile-sites/?hl=en-EN&utm_source=MFT&utm_medium=incoming-link&utm_campaign=MFT
4.) The mobile friendly test will show if you have a ugly or a good looking website on mobile devices: https://www.google.com/webmasters/tools/mobile-friendly/
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For those of you familiar with the german language I made a short video explanation: