.country-select,
.country-select .country-list,
.country-select input {
    width: 100%;
}

.country-select {
    display: block;
    width: 100%; /* change to any width you want */
}

.country-select input {
    width: 100%;
}

.country-input {
    box-sizing: border-box;
    border: 1px solid #bdbdbd;
    height: 55px;
    font-size: 18px;
    font-family: inherit;
}
    .country-select .flag-dropdown {
        height: 55px;
    }

    .country-select .selected-flag {
        height: 55px;
        display: flex;
        align-items: center;
    }

    .country-select input {
        height: 55px;
        padding-left: 52px !important;
        box-sizing: border-box;
    }

.country-select .flag-dropdown {
    width: 300px;
}

.country-list .country {
    transform: none;
    margin-right: 4px;
    transform: scale(1.6);
    transform-origin: left center;
}

.readonly-field .selected-flag {
    background-color: #f5f5f5 !important;
}