.bp3-popover2-content {
    max-width: 300px;
    padding: 8px;
    border-radius: 4px;
    background: #444;
    color: #fff;
    font-size: 11px;
    font-family: Avenir Next, Montserrat, Sans-Serif
}

.bp3-popover2-arrow {
    display: none
}