.engine-form-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 1000;
    display: block;
    width: 100%;
    max-height: 250px;
    overflow-y: auto;
    background-color: #fff;
    border: 1px solid rgba(0,0,0,.15);
    border-radius: .375rem;
    padding: .5rem 0;
    list-style: none;
}

.engine-form-dropdown-menu-item {
    text-align: left;
    cursor: pointer;
}

.engine-form-dropdown-menu-item.active,
.engine-form-dropdown-menu-item:hover {
    background-color: #eef0f1;
}