Cross browser font CSS

font-weight: 400;
font-size: 1rem;
font-family: "Open Sans", Helvetica, Arial, sans-serif;
line-height: 1.6;
color: #555;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
-moz-font-feature-settings: "liga", "kern";
text-rendering: optimizelegibility;
background-color: #fff;​