div.line-mouse-marker {
    background-color: white;
    border: 4px solid magenta;
    border-radius: 8px;
}

.dist-marker {
    font-size: 10px;
    /* 1px less than height to also center in Firefox (?) */
    line-height: 17px;
    border: 1px solid #777;
    border-radius: 9px;
    text-align: center;
    text-shadow: -1px 0 white, 0 1px white, 1px 0 white, 0 -1px white;
    color: black;
    background: rgba(255, 255, 255, 0.5);
}