h1 {
    font-size: 50px;
    text-align: center;
}

h2 {
    font-size: 20px;
    text-align: center;
}

#paginas {
    font-size: 15px;
    text-align: center;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #406186;
    color: #000000;
}

#principal {
    margin: 30px;
    padding: 40px;
    display: grid;
    place-items: center;
}

#principal2 {
    border-color: black;
    border-style: solid;
    border-width: 4px;
    margin: 30px;
    padding: 40px;
}
#formulario{
    margin: 30px;
    padding: 40px;
    display: grid;
    align-items: center;
}
#tablaf{
    align-self: center;
    display: grid;
    align-items: center;
}