.mentions-input-box {
    position: relative;
    background: #fff;
}

    .mentions-input-box textarea {
        width: 100%;
        display: block;
        height: 18px;
        padding: 9px;
        border: 1px solid #dcdcdc;
        border-radius: 3px;
        overflow: hidden;
        background: transparent;
        position: relative;
        outline: 0;
        resize: none;
        -webkit-box-sizing: border-box;
        -moz-box-sizing: border-box;
        box-sizing: border-box;
    }

    .mentions-input-box .mentions-autocomplete-list {
        display: none;
        background: #fff;
        border: 1px solid #b2b2b2;
        position: absolute;
        left: 0;
        right: 0;
        z-index: 10000;
        margin-top: -2px;
        border-radius: 5px;
        border-top-right-radius: 0;
        border-top-left-radius: 0;
        -webkit-box-shadow: 0 2px 5px rgba(0, 0, 0, 0.148438);
        -moz-box-shadow: 0 2px 5px rgba(0, 0, 0, 0.148438);
        box-shadow: 0 2px 5px rgba(0, 0, 0, 0.148438);

        max-height: 200px; 
        overflow-y: auto; 
    }

        .mentions-input-box .mentions-autocomplete-list ul {
            margin: 0;
            padding: 0;
        }

        .mentions-input-box .mentions-autocomplete-list li {
            background-color: #fff;
            padding: 0 5px;
            margin: 0;
            width: auto;
            border-bottom: 1px solid #eee;
            height: 26px;
            line-height: 26px;
            overflow: hidden;
            cursor: pointer;
            list-style: none;
            white-space: nowrap;
        }

            .mentions-input-box .mentions-autocomplete-list li:last-child {
                border-radius: 5px;
            }

            .mentions-input-box .mentions-autocomplete-list li > img,
            .mentions-input-box .mentions-autocomplete-list li > div.icon {
                width: 16px;
                height: 16px;
                float: left;
                margin-top: 5px;
                margin-right: 5px;
                -moz-background-origin: 3px;
                border-radius: 3px;
            }

            .mentions-input-box .mentions-autocomplete-list li em {
                font-weight: bold;
                font-style: none;
            }

            .mentions-input-box .mentions-autocomplete-list li:hover,
            .mentions-input-box .mentions-autocomplete-list li.active {
                background-color: #f2f2f2;
            }

            .mentions-input-box .mentions-autocomplete-list li b {
                background: #ffff99;
                font-weight: normal;
            }

    .mentions-input-box .mentions {
        position: absolute;
        left: 1px;
        right: 0;
        top: 1px;
        bottom: 0;
        padding: 9px;
        color: #fff;
        overflow: hidden;
        white-space: pre-wrap;
        word-wrap: break-word;
    }

        .mentions-input-box .mentions > div {
            color: #fff;
            white-space: pre-wrap;
            width: 100%;
        }

            .mentions-input-box .mentions > div > strong {
                font-weight: normal;
                background: #d8dfea !important;
            }

                .mentions-input-box .mentions > div > strong > span {
                    filter: progid:DXImageTransform.Microsoft.Alpha(opacity=0);
                }