rustdesk/src/ui/remote.css

body {
    margin: 0;
    color: black;
    overflow: scroll-indicator;
}

div#video-wrapper {
    size: *;
    background: #212121;
}

video#handler {
    behavior: native-remote video;
    size: *;
    margin: *;
    foreground-size: contain;
}

img#cursor {
    position: absolute;
    display: none;
    //opacity: 0.66,
    //transform: scale(0.8);
}

.goup {
  transform: rotate(90deg);
}

table#remote-folder-view {
    context-menu: selector(menu#remote-folder-view);
}

table#local-folder-view {
    context-menu: selector(menu#local-folder-view);
}