.form-dat-lich-tu-van {
    display: flex;
    gap: 0.5rem;
}

.form-dat-lich-tu-van input[name="phone_number"] {
    border-radius: .5rem;
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
    padding-left: 0.75rem;
    padding-right: 0.75rem;
    border-color: rgb(209 213 219);
    margin-bottom: .5rem;
}

.form-dat-lich-tu-van .btn-submit {
    background-color: rgb(22 163 74);
    border-radius: .5rem;
    margin: 0;
    padding-left: 1rem;
    padding-right: 1rem;
    color: #fff;
}