* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

h3 {
    font-family: 'rebonto', sans-serif;
    font-size: 25pt;
    letter-spacing: 1px;
    width: 100%;
    background-color: #0e3854;
    padding: 15px;
    color: #fff;
    text-align: center;
    text-transform: uppercase;
}

#container {
    width: 100%;
    height: 100vh;
    display: -webkit-flex;
    display: -moz-flex;
    display: -o-flex;
    display: flex;
    justify-content: center;
    align-items: center;

    /* background-image: url(../img/fondo_inicio_sesion.jpg); */
    background-image: no-repeat;
    background-size: 100vw 100vh;
    background-attachment: fixed;
    /*filter: opacity(.9);*/
}

#container form {
    width: 360px;
    background: #fff;
    padding: 10px;
    box-shadow: rgba(0, 0, 0, 0.25) 0px 54px 55px, rgba(0, 0, 0, 0.12) 0px -12px 30px, rgba(0, 0, 0, 0.12) 0px 4px 6px, rgba(0, 0, 0, 0.17) 0px 12px 13px, rgba(0, 0, 0, 0.09) 0px -3px 5px;
}

#container form img {
    margin: 15px auto;
    text-align: center;
    display: block;
    width: 256px;
    height: 98px;
}

#container form input {
    width: 90%;
    padding: 5px;
    font-size: 16pt;
    display: block;
    margin: 25px auto;
    border-radius: 5px;
    border: 1px solid #85929e;
    text-align: center;

}

#container form input[type="submit"] {
    background: #399c1d;
    padding: 10px;
    color: #fff;
    letter-spacing: 1px;
    border: 0;
    cursor: pointer;
}

.alert {
    font-family: arial;
    font-size: 16px;
    text-align: center;
    color: red;
}

@media screen and(max-width: 460px) {
    #container form {
        width: 90%;
    }
}