Hello,

As for the header please check the issue on any default theme.

In order to add the red border to the product grid, please replace this code:

.woodmart-hover-base.hover-ready.state-hover, .woodmart-hover-base.hover-ready:hover {
    z-index: 20;
    -webkit-transform: translateY(-5px) translateZ(0);
    transform: translateY(-5px) translateZ(0);
     border: 1px solid red;
}

Best Regards