fieldset (CSS)

<form action="" method="post">
   <fieldset style="width: 70%; border: 4px solid cornflowerblue; background: lavender;">
      <label for="vorname">Vorname </label>
      <input id="vorname" type="text" name="vorname" size="30" maxlength="30" value="Ihr Name" />
      <label for="name">Name </label>
      <input id="name" type="text" name="nachname" size="30" maxlength="30" value="Ihr Nachname" />
   </fieldset>
</form>
<form action="" method="post">
   <fieldset style="width: 70%">
      <legend> Anmeldung </legend>
      <label for="vorname" >Vorname </label>
      <input id="vorname" type="text" name="vorname" size="30" maxlength="30" value="Ihr Name" />
      <label for="name">Name </label>
      <input id="name" type="text" name="nachname" size="30" maxlength="30" value="Ihr Nachname" />
   </fieldset>
</form>

Vorname

Name

Anmeldung

Vorname

Name