@media only screen and (max-width: 540px) {
    #mainNav .navbar-toggler {
        background-color: #25a8ab !important;
        color: #fff;
        outline: none;
        box-shadow: none;
        padding: 6px 10px;
        font-size: 1.2rem;
    }

    .navbar-collapse ul {
        border-top: 1px solid #eaeaea;
    }

    .header_btns_wrap a {
        display: block;
        margin: 20px 0px !important;
        width: 100%;
    }
}