.jumbotron {
    position: relative;
    z-index: 2;
    width: 400px;
    height: 320px;
    margin: auto;
    box-shadow: 0 8px 16px -6px black;
    background: rgb(188, 188, 188);
    border: 2px solid rgb(165, 165, 165);
}

    .jumbotron input {
        margin: 2px;
    }

    .jumbotron button {
        margin-top: 10px;
    }

#card_title {
    font-size: 20px;
    color: black;
    margin-bottom: 10px
}

#card_logo {
    margin: 0px;
    max-width: 300px;
    max-height: 80px;
}

#lb_header {
    margin-top: 20px;
}

.op-reset {
    color: #0e5cae;
}


@media screen and (max-width: 850px) {
    .jumbotron {
        height: 220px;
    }

        .jumbotron input {
            height: calc(1.5em + .5rem + 2px);
        }

    #lb_header {
        font-size: 1.5rem;
    }

    #card_logo {
        max-width: 200px;
        max-height: 60px;
        margin-bottom: 2px;
    }

    #card_title {
        display: none;
    }

    #bt_login {
        padding: .25rem .5rem;
        font-size: .875rem;
        line-height: 1.5;
        border-radius: .2rem;
    }
}