CSS validation has an error

[toplisek]

Code is the following inside CSS:
fh-switch > [type="checkbox"]:checked + label + .fh-switch-knob, .fh-switch > [type="checkbox"]:not(:checked) + label + .fh-switch-knob

1. How to solve an error:
Property pointer-events doesn't exist : none

2. How to solve an error:
Feature -webkit-min-device-pixel-ratio doesn't exist for media screen

CSS code is the following:
@media only screen
and (min-device-width: 768px)
and (max-device-width: 1024px)
and (-webkit-min-device-pixel-ratio: 1) {
.myCLASS1 { }
}

[not2easy]

The media query posted is not for mobile, maybe that

and (-webkit-min-device-pixel-ratio: 1)

line should be removed and that would remove your error.