leaflet popup background styling

.leaflet-popup-content-wrapper {
  background-color:#FFFFFF;
  background-color: rgba(255,255,255,.7);
  background: transparent\9; /* clear current background for ie */
  zoom:1; /* required for the filters */  
  /* For IE 5.5 - 7*/
  filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#7FFFFFFF, endColorstr=#7FFFFFFF);
  /* For IE 8*/
  -ms-filter:"progid:DXImageTransform.Microsoft.gradient(startColorstr=#7FFFFFFF, endColorstr=#7FFFFFFF)";

  border:none;
  -webkit-border-radius:0;
    -moz-border-radius: 0;
          border-radius:0;
  }