Inline CSS – WHY??

Dears,

ShopIsle uses inline CSS – why?
It is not good practice and prevents me to override some CSS styles.

There is

@media (max-width: 768px) {
.navbar-fixed-top .navbar-collapse {
background: rgba(10, 10, 10, .9) !important;
}
}

in the HTML code when I use my site on mobile phone.

Is this the case with the PRO version as well?
Not meaning the Customizer options to set the colors but is this code still an inline style?

Thanks,
Michael