.categories-wrapper { 
    position: relative;
}

.categories-list { 
    position: absolute;
    top: 0;
    left: 30px;

    width: 200px;

    display: none;

    background: #C3C3C3;
    color: black;

    border-top: 1px solid white;
    border-left: 1px solid white;
    border-bottom: 1px solid #999;
    border-right: 1px solid #999;
}

.categories-list * { 
    margin: 0;
    padding: 0;
}