.countrycode-container .dropdown-menu {
    max-height: 250px;
    overflow-x: hidden;
    overflow-y: scroll;
}
.countrycode-container .dropdown-menu li {
    padding: 10px;
    cursor: pointer;
}
.countrycode-container .dropdown-menu li:hover {
    opacity: .9;
}
.countrycode-container .btn-default {
    background: transparent;
}