themes/ignite-shop/webapp/ignite/scss/bootstrap_src/utilities/_position.scss
// Positioning
.fixed-top {
position: fixed;
top: 0;
right: 0;
left: 0;
z-index: $zindex-fixed;
}
.fixed-bottom {
position: fixed;
right: 0;
bottom: 0;
left: 0;
z-index: $zindex-fixed;
}
.sticky-top {
position: sticky;
top: 0;
z-index: $zindex-sticky;
}