fieldset {

  position: relative;

  padding: 0;

  width: 200px;

}

label {

  position: absolute;

  font-size: 0;

  color: transparent;

  width: 20px;

  height: 20px;

  background: #fff;

  top: -5px;

  right: 20px;

  -webkit-box-shadow: 0px 0px 3px #000;

  -moz-box-shadow: 0px 0px 3px #000;

  box-shadow: 0px 0px 3px #000;

}

label:after,

label:before {

  content: "";

  position: absolute;

  bottom: 8px;

  left: 5px;

  width: 0;

  height: 0;

  border: 5px solid #000;

  border-bottom: 0;

  border-color: #000 transparent;

}

label:after {

  border-color: #fff transparent;

  bottom: 10px;

}

​

textarea {

  border: 0;

  padding: 0;

  width: 100%;

}