Responsive web design (RWD) is an approach to web design aimed at allowing desktop webpages to be viewed in response to the size of the screen or web browser one is viewing with.
No, without customizations, since o.red rewrite rules used by htaccess.
A normal LAMP system (Linux, Apache, My- or MariaSQL, PHP) as offered by most providers, fulfills all requirements. The PHP version must be greater then 7.0.
