.static { position: static }
.relative { position: relative }
.absolute { position: absolute }
.fixed { position: fixed }
.focus-static:focus { position: static }
.focus-relative:focus { position: relative }

.top-0 { top: 0 }
.left-0 { left: 0 }
.right-0 { right: 0 }
.bottom-0 { bottom: 0 }

.top-auto { top: auto }
.left-auto { left: auto }
.right-auto { right: auto }
.bottom-auto { bottom: auto }