b.arrow {
    cursor: pointer;
    display: flex;
    height: 30px;
    left: auto;
    position: absolute;
    right: 10px;
    top: 5px;
    width: 35px;
    z-index: 999;
    justify-content: center;
    align-items: center;
    border: 1px solid #ddd;
}
b.arrow::before {
    content: "\f0d7";
    display: inline-block;
    position: relative;
    font-family: 'Font Awesome 5 Free';
    font-size: 17px;
    transition: all 0.1s linear 0s;
    color: #fff;
    line-height: 0;
}

.nav li.arrow > a:after, .nav li.arrow > a:visited:after {
    display: none;
}