What is the problem (Bootstrap modal window)?

Question

JavaScript

Can you please tell me why when calling a modal window, the navbar remains visible instead of hiding under opacity? The modal window is called by pressing the button on the slider. (Salon choice)
Site - https://see-and-use.github.io/New%20Group%20of%20s...

Answer 1

why did you set z-index: 9999; for .header .col-sm-12?

.header .col-sm-12 {
    padding-left: 0;
    padding-right: 0;
    z-index: 9999;
}