// 1. Addresses box sizing set to content-box in IE8/9.
// 2. Removes excess padding in IE8/9.
// 3. Removes excess padding in IE7.
//    Known issue: excess padding remains in IE6.

input[type="checkbox"],
input[type="radio"]
  box-sizing: border-box // 1
  padding: 0 // 2
  *height: 13px // 3
  *width: 13px // 3