.MatresultDropdown {
    background: #fff;
    width: 100%;
    max-height: 200px;
    overflow: auto;
    position: absolute;
    z-index: 99;
    border: solid thin #ccc;
    display: none;
}

    .MatresultDropdown ul {
        padding: 0px;
        margin: 0px;
    }