/* Shorthand */
border-radius: 4px 4px 4px 4px / 4px 4px 4px 4px

/* Longhand */
border-top-left-radius: 4px 4px
border-top-right-radius: 4px 4px
border-bottom-right-radius: 4px 4px
border-bottom-left-radius: 4px 4px