css for internet explorer only

1@media all and (-ms-high-contrast: none), 
2               (-ms-high-contrast: active) {
3  /* IE10+ CSS styles goes underneath */
4  #ie11 h2 {
5    color: #fff;
6  }
7  #ie11 h2:hover {
8    color: gray;
9  }
10}

1    @media all and (-ms-high-contrast:none)
2     {
3     .foo { color: green } /* IE10 */
4     *::-ms-backdrop, .foo { color: red } /* IE11 */
5     }