html body {
    font-family: montserrat, sans-serif;
    margin: 0;
    padding: 0;
}


input.input-bb {
    border-radius: 0;
    border: 2px transparent solid;
    border-bottom: solid black 2px;
    background: transparent;
    text-color: black;
}

input.input-bb:focus, input.input-bb:hover {
    border-radius: 0;
    border: 2px black solid;
    box-shadow: none;
    background: transparent;
}

ul.nav-tabs {
    border-bottom: 1px solid black;
}

.nav-tabs a.nav-link.active {
    border-color: transparent;
    border: 1px solid transparent;
    border-radius: 0;
}
.nav-tabs a.nav-link:hover {
    border-color: black;
    border: 1px solid black;
    border-radius: 0px;
}

#green-form {
    background-color: #ceeb4c;
}

#green-form .form-select {
    background-color: transparent;
    border-color: transparent;
    border: 1px solid transparent;
    border-radius: 0;
    border-bottom: 1px solid black;
}

#green-form .form-select:hover {
    border-color: black;
    border: 1px solid black;
    border-radius: 0px;
}
#green-form .form-select:focus {box-shadow: none;}

#green-form input {
    color: black;
}

.is-invalid.custom-checkbox, #green-form .form-select.is-invalid {
    border: solid #dc3545 1px;
}


@media all and (max-width: 500px) {

    .links {
        display: flex;
        flex-direction: column;
    }
}