fieldset {
  margin: 20px;
  padding: 0 10px 10px;
  border: 1px solid #666;
  border-radius: 8px;
  box-shadow: 0 0 10px #666;
  padding-top: 10px;
}
legend {
  padding: 2px 4px;
  background: #fff;
  /* For better legibility against the box-shadow */
}
fieldset > legend {
  float: left;
  margin-top: -20px;
}
fieldset > legend + * {
  clear: both;
}