Aspect set de câmp non-formular - CSS-Tricks

Booyah!

.fieldset ( position: relative; border: 1px solid #ddd; padding: 10px; ) .fieldset h1 ( position: absolute; top: 0; font-size: 18px; line-height: 1; margin: -9px 0 0; /* half of font-size */ background: #fff; padding: 0 3px; )