perser79

        <h1>Formulario HTML5</h1>
        <form action="formulario.php" method="post">
        <fieldset>
            <legend>Datos</legend>
            <div class="cont1">
                <label for="mail">Mail</label>
                <input type="email" id="mail" name="mail" placeholder="nombre@hosting.com" size="30" required="required" autofocus>
                <br>
                <br>
                <label for="web">Web</label>

perser79

div.banda {
  width: 250px;
  height: 80px;
  background-color: #00aaff;
  position: relative;
  margin: auto;
  margin-top: 80px;
}

div.banda div.triangulo {

perser79

.boton {
    
    text-decoration: none;
    font-size: 13px;
    font-weight: bold;
    color: white;
    display: inline-block;
    text-align: center;
    padding: 10px 20px;
    -webkit-border-radius: 10px;