body{
    background: url(imagenes/fondo.jpg);
    font-family: Verdana,Arial,Helvetica,sans-serif;
    font-size: 12px;
    line-height: 18px;
}
#central{
    position:absolute;
    top:50%;
    left: 50%;
    margin-top: -350px;
    margin-left: -167px;
    background: url(imagenes/formulario.png) no-repeat;       
}
.titulo{
    font-family: “Trebuchet MS”, sans-serif;
    font-size: 24px;
    font-style: normal;
    font-weight: bold;
    text-transform: normal;
    letter-spacing: -1px;
    line-height: 1.2em;
    color:#324e70;
}
.texto{
    font-family: Georgia, serif;
    font-size: 15px;
    font-style: italic;
    font-weight: normal;
    text-transform: normal;
    letter-spacing: normal;
    line-height: 1.4em;
}
.operacion{
    font-family: Verdana,Arial,Helvetica,sans-serif;
    font-size: 12px;
    line-height: 18px;
}
.contenedor{
    -moz-border-radius: 5px;
    -webkit-border-radius: 5px;
    border-radius: 5px;
    -moz-box-shadow: 0 0 50px rgba(0, 0, 0, 9.5);
    -webkit-box-shadow: 0 0 50px rgba(0, 0, 0, 9.5);
    box-shadow: 0 0 50px rgba(0, 0, 0, 9.5);
    height: 150px;
    width: 320px;
    background-color:#FFF;
    padding:10px;
    text-align:center;
}