body {background-color: rgb(199,199,199);}

.contact_form h2 {
    background: none repeat scroll 0 0 #c1bfbf;
    border-radius: 5px;
    color: #164a20;
    display: block;
    font-family: calibri;
    font-size: 20px;
    padding: 5px;
    text-shadow: 1px 1px 1px #CCCCCC;
    width: 433px;
}
/*— estilos para los ul y li del formulario —*/
.contact_form ul {
    width:500px;
    list-style-type:none;
    margin:0px;
    padding:0px;
}
.contact_form li{
    padding:12px;
    border-bottom:1px solid #eee;
    position:relative;
}
.contact_form label {
    color: #555555;
    display: inline-block;
    float: left;
    font-family: calibri;
    font-size: 13px;
    font-weight: bold;
    margin-top: 3px;
    padding: 3px;
    width: 90px;
}
.contact_form input {
    height:20px;
    width:300px;
    padding:5px 8px;
}
.contact_form textarea {
    padding:8px;
    width:300px;
}
.contact_form button {
    margin-left:290px;
}

/*—– estilos visuales de los elementos ——–*/

.contact_form input, .contact_form textarea {
    border:1px solid #aaa;
    box-shadow: 0px 0px 3px #ccc, 0 10px 15px #eee inset;
    border-radius:2px;
    color: #888;
    font-size: 12px;
    padding-right:30px;
    -moz-transition: padding .25s;
    -webkit-transition: padding .25s;
    -o-transition: padding .25s;
    transition: padding .25s;
}
.contact_form input:focus, .contact_form textarea:focus {
    background: #fff;
    border:1px solid #555;
    box-shadow: 0 0 3px #aaa;
    padding-right:80px;
}

/* === Estilos de Validacion === */    

.contact_form input:required:valid, .contact_form textarea:required:valid {
    box-shadow: 0 0 5px #5cd053;
    border-color: #28921f;
}
.contact_form input:focus:invalid, .contact_form textarea:focus:invalid {
    box-shadow: 0 0 5px #d45252;
    border-color: #b03535
}

/* === Estilos del boton de Envio === */
button.submit {
    padding: 9px 17px;
   font-family: Helvetica,calibri, Arial, sans-serif;
   font-weight: bold;
   line-height: 1;
   color: #444;
   border: none;
   text-shadow: 0 1px 1px rgba(255, 255, 255, 0.85);
   background-image: -webkit-gradient(linear, 0% 0%, 0% 100%, from(#fff), to(#bbb));
   background-image: -moz-linear-gradient(0% 100% 90deg, #BBBBBB, #FFFFFF);
   background-color: #fff;
   border: 1px solid #f1f1f1;
   border-radius: 10px;
   box-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}
button.submit:hover {
    opacity:.55;
    cursor: pointer;
    color: #fff;
}
button.submit:active {
    border: 1px solid #222;
    box-shadow: 0 0 10px 5px #444 inset;
}