.border-trim { border-width: 0 }
.border-thin { border-width: thin }
.border-medium { border-width: medium }
.border-thick { border-width: thick }

.top-trim { border-top-width: 0 }
.left-trim { border-left-width: 0 }
.right-trim { border-right-width: 0 }
.bottom-trim { border-bottom-width: 0 }