.row {
    height: 600px;
}

.header-login {
    height: 79%;
}

    .header-login .card-header {
        padding: 0px 0px 0px 0px;
    }

.card-header {
    background-color: #17254c;
}

.header-login ul.nav-tabs {
    margin: 0px 0px -1px 0px;
}

.header-login li.nav-item {
    width: 50%;
}

.header-login a.nav-link {
    font-size: 1rem;
    color: #fff;
    text-align: center;
    padding: 1rem;
}

    .header-login a.nav-link.active {
        background-color: #fff;
        color: #000;
        font-size: 19px;
    }


.first-section, .second-section, a {
    text-decoration: none;
    color: #000;
}

#login-submit, #registerSubmit {
    font-size: 18px;
    height: 55px;
    right: 20px;
    border-color: #17254c;
    background-color: #17254c;
    color: #fff;
}

@media only screen and (min-width: 1001px) and (max-width: 1440px) {
    .col-5 {
        flex: 0 0 auto;
        width: 70%;
        height: 123%;
    }

    #login-submit {
        font-size: 18px;
        height: 60px;
        right: 20px;
    }
}

@media only screen and (min-width: 780px) and (max-width: 1000px) {
    #login-submit {
        font-size: 18px;
        height: 55px;
    }

    .col-5 {
        flex: 0 0 auto;
        width: 70%;
        height: 103%;
    }

    .header-login {
        height: 79%;
        margin: -56px 0px 0px 0px;
    }
}

@media only screen and (min-width: 771px) and (max-width: 779px) {
    html {
        height: 70%;
    }

    .col-5 {
        flex: 0 0 auto;
        width: 67%;
    }

    .row {
        margin-top: -20px;
        height: 50%;
    }

    form {
        margin-top: 68px;
    }

    #login-submit {
        font-size: 14px;
        height: 48px;
        right: 10px;
    }

    .header-login {
        height: 77%;
        margin: 145px 0px 0px 0px;
    }
}

@media only screen and (min-width: 230px) and (max-width: 770px) {
    html {
        height: 70%;
    }

    .row {
        margin-top: -20px;
        height: 50%;
    }

    form {
        margin-top: 68px;
    }

    #login-submit, #registerSubmit {
        font-size: 11px;
        height: 48px;
        right: 1px;
    }

    .header-login {
        height: 86%;
    }

    .col-5 {
        flex: 0 0 auto;
        width: 67%;
    }
}