.login-page {
    background: url(../../images/fondo-login-maestros.png);
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: 100% 100%;
    height: 100vh;
    padding: 0;
    margin: 0;
    list-style: none;
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    -webkit-flex-flow: row wrap;
    justify-content: space-around;
    display: flex;
}

#logo {
    width: 40%;
}

.login-box,
.register-box {
    width: 360px;
    margin: 1% auto;
    background: white;
    border: 5px solid black;
}