betaflight-configurator/tabs/ports.css

.tab-ports {
    position: relative;
}

#tab-ports-templates {
    display: none;
}

.tab-ports .help {
    padding: 10px;
    background-color: #ffcb18;
    margin-bottom: 10px;
}

.tab-ports table {
    margin-bottom: 10px;

    border-collapse: collapse;
}
.tab-ports table,
.tab-ports table th,
.tab-ports table td {
    padding: 4px;
    border: 1px solid #8b8b8b;
}
.tab-ports table tr td:first-child {
    text-align: center;
}
.tab-ports table td {
    padding: 2px 10px;
}

.tab-ports table thead tr:first-child,
.tab-ports table tr:nth-child(even) {
    background-color: #ececec;
}

.tab-ports select {
    border: 1px solid silver;
}
.tab-ports > .buttons {
    width: calc(100% - 20px);

    margin-top: 10px;
    bottom: 10px;
}

.tab-ports .save {
    display: block;
    float: right;

    height: 28px;
    line-height: 28px;

    padding: 0 15px 0 15px;

    text-align: center;
    font-weight: bold;

    border: 1px solid silver;
    background-color: #ececec;
}
.tab-ports .save:hover {
    background-color: #dedcdc;
}