.mention-dropdown {
    box-sizing: border-box;
    max-height: 260px;
    overflow-y: auto;
    background: #fff;
    border: 1px solid #bbb;
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.mention-dropdown__item {
    box-sizing: border-box;
    padding: 8px 12px;
    cursor: pointer;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.mention-dropdown__item:hover,
.mention-dropdown__item--active {
    background: #eee;
}