.status-indicator {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.status-operational {
    background-color: green;
}

.status-stopped {
    background-color: red;
}

.status-preop {
    background-color: orange;
}

.status-unknown {
    background-color: gray;
}