I'm just wanting to style all the key elements of the map

I'm just wanting to style all the key elements of the map and directions box.

I've got the following:

.agm_mh_container ul li {
margin-top: 0.2em;
padding: 0.2em;
background-color: transparent;
list-style: none outside none;
border: rgb(46, 46, 46)
overflow: hidden;
}

a.agm_mh_marker_item {
color: rgb(255, 255, 255);
}

Which is kinda working (I still can't get rid of the border around the directions box)

I'd also like to change how the direction box looks, which key css should I focus on?