Why are styles loaded from a non-main template?

Question

PHP

The main template is located here /bitrix/templates/ dir_name/ and contains the following line:

<link href="<?=SITE_TEMPLATE_PATH?>/common.css" type="text/css" rel="stylesheet" />

At the same time, I edit the styles in / local/ templates/ dir_common/ common.css
and everything works .. but I don’t understand how this happens

Answer 1

the local folder has priority over the bitrix folder
This means that if /local/templates/ and /bitrix/templates/ contain site templates with the same name, the template from /local will be connected.