body > div { display: inline-block }
fieldset, .fieldset { padding: 0; height:10em; width:2em; border:1em groove; margin: 0em; line-height:1 }
legend, .legend { padding: 0; width: 1em }
.legend {
  background: white; /* overlap the border to emulate the border not being painted */
  display: table; /* shrink-wrap */
}

[style="writing-mode: vertical-lr"] .legend {
  margin-left: -1em;
}
[style="writing-mode: vertical-rl"] .legend {
  margin-right: -1em;
}
.top { margin-bottom: auto }
.center { margin-top: auto; margin-bottom: auto }
.bottom { margin-top: auto }
.rtl { direction: rtl }