multiselect {
    display: block;
    width: calc(100% - 12px);
    box-sizing: border-box;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    border: 1px solid #BEBEBE;
    border-radius: 0;
    padding: 7px;
    -webkit-transition: all 0.30s ease-in-out;
    -moz-transition: all 0.30s ease-in-out;
    -o-transition: all 0.30s ease-in-out;
    outline: none;
}

    multiselect .btn {
        width: 100%;
        background-color: #FFF;
        position: relative;
        z-index: 100;
    }

        multiselect .btn.error {
            border: 1px solid #da4f49 !important;
        }

    multiselect .dropdown-menu {
        max-height: 300px;
        overflow-y: auto;
        position: relative;
        z-index: 999;
    }

    multiselect .dropdown-menu {
        width: 80%;
        max-width: 700px;
        box-sizing: border-box;
        padding: 2px;
        position: relative;
        z-index: 999;
    }

        multiselect .dropdown-menu > li > a {
            padding: 3px 10px;
            cursor: pointer;
            position: relative;
            z-index: 999;
        }