CodePen Embed - Seletores

<form class="example-enabled">
  <fieldset>
    <input type="text" disabled="disabled" />
    <input type="text" />
    <input type="text" disabled="disabled" />
  </fieldset>
</form>

<form class="example-disabled">
  <fieldset>
    <input type="text" disabled="disabled" />
    <input type="text" />
    <input type="text" disabled="disabled" />
  </fieldset>
</form>

form{ margin-bottom:20px;}
form input{
  width:100%;
  display:block;
  margin-bottom:10px;
}
.example-enabled input:enabled{
  border:2px solid #f00;
}

.example-disabled input:disabled{
  border:2px solid #f00;
}

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