Drupal has very few ready-made beautiful and functional themes. But Drupal integrates very easily with all third-party libraries and services. So for example, you can make your theme based on Bootstrap and use all the power of Drupal. In this section of the drupalbook.org site, we will discuss how to create themes quickly and conveniently from any layout.
We will also look at how to typeset adaptively so that the same HTML is used for the mobile and desktop versions: