@-ms-keyframes example {
  from {background-color: red;}
  to {background-color: yellow;}
}
@-o-keyframes example {
  from {background-color: red;}
  to {background-color: yellow;}
}

div.cls {
  color: rgba(51, 170, 51, .1);
  width: calc(100% - 80px);
  transform: rotate(45deg);
}
img {
  filter: grayscale(0.5) blur(10px);
}

a[href*="example"], * [lang^=en] {
  font-size: 2em;
}

@supports (display: flex) {
  @media screen and (min-width: 900px) {
    article {
      display: flex;
    }
  }
}

@media only screen and (orientation: landscape) {
  body {
    background-color: lightblue;
  }
}

@page :first {
    margin: 2cm;
}

@font-face {
    font-family: "Open Sans";
    src: url("/fonts/OpenSans-Regular-webfont.woff2") format("woff2"),
         url("/fonts/OpenSans-Regular-webfont.woff") format("woff");
  }