aside.fi-sidebar header a  {
    position: relative;
    display: block;
}
aside.fi-sidebar header a::after {
    content: "BETA";
    position: absolute;
    top: 3px;
    right: 0;
    transform: translate(50%, -50%);
    background-color: #00aeef;
    color: #fff;
    font-size: 0.6rem;
    font-weight: bold;
    padding: 1px 4px;
    border-radius: 3px;
    z-index: 10;
    transition: all ease-in-out 0.1s;
}
aside.fi-sidebar header a:hover::after {
    transform: translate(50%, -50%) rotate(-3deg);
}