salix/client/core/src/drop-down/style.scss

vn-drop-down {
    position: absolute;
    z-index: 9999;
    padding: 0 15px;
    margin-left: -15px;
    background: transparent;
    .dropdown-body{
        background: white;
        border: 1px solid #A7A7A7;
        .filter{
            padding: 5px 9px 5px 5px;
            input{
                height: 25px;
                padding-left: 5px;
            }
            vn-icon{
                font-size: 16px;
                margin-left: -20px;
                margin-top: 7px;
                cursor: pointer;
                &:hover{
                    color: red;
                }
            }
        }
        ul{
            padding: 0;
            margin: 0;
            background: white;
            max-height: 400px;
            overflow-y: auto;
            li {
                list-style-type: none;
                padding: 5px 10px;
                cursor: pointer;
                white-space: nowrap;
            }
            li:hover{
                background-color: #3D3A3B;
                color: white;
            }
        }
     }
}