Hi nikolasf,
1/ Open the \templates\ja_autoshop\etc\assets.xml file and replace the line 9 with:
<file>//fonts.googleapis.com/css?family=Barlow:400,500,600,700&family=Chivo:400,700</file>
2+3/ Open the \templates\ja_autoshop\tpls\blocks\head.php line 14:
Replace with this code:
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no"/>
<style>
/* You can remove these viewport rules */
/* @-webkit-viewport { width: device-width; } */
/* @-moz-viewport { width: device-width; } */
/* @-ms-viewport { width: device-width; } */
/* @-o-viewport { width: device-width; } */
/* @viewport { width: device-width; } */
</style>
Hope this helps!