.close_tab_au {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    margin: auto;
    height: 60px;
    background-color: red;
    width: 80px;
    color: white;
    text-align: center;
    z-index: 1;
    cursor: pointer;
    transition: all 1s;
    line-height: 15px;
    padding: 5px;
}

.close_tab_au:hover {
    transform: scale(1.2);
    transition: all 1s;
}