samples/net/rpl_border_router/src/style.css

h1 {
    margin-left: 20px;
}

table, th, td {
    border-collapse: collapse;
}

th, td {
    padding: 15px;
}

th {
    text-align: left;
}

.tabcontent table {
    border-collapse: collapse;
    width: 100%;
}

.tabcontent td, th {
    border: 1px solid #dddddd;
    text-align: left;
    padding: 8px;
}

.tabcontent tr:nth-child(even) {
    background-color: #dddddd;
}

/* Change background color on hover
.tabcontent tr:hover {
    background-color:#f5f5f5
}
*/

td.wrappable {
    word-wrap: break-word;
    white-space: normal;
}

.box {
    background-color: white;
    color: black;
    border-radius: 5px;
    font-size: 18px;
}

body {
    margin: 40px;
}

.sidebar {
    grid-area: sidebar;
}

.content {
    grid-area: content;
    height: 100%;
    overflow: auto;
}

.header {
    grid-area: header;
    text-align: center;
    background-color: #ededed;
}

.footer {
    grid-area: footer;
    scroll-behavior: auto;
    font-size: 100%;
    overflow: auto;
}

.container {
    display: grid;
    grid-gap: 10px;
    grid-template-columns: 15% 45% 40%;
    grid-template-rows: 3% 90% 5%;
    grid-template-areas:
	"header header header"
	"sidebar content content"
	"footer footer footer";
}

.footer {
    background-color: #999;
}

/* Style the tab */
div.tab {
    overflow: hidden;
    background-color: #444444;
    border: 1px solid #444444;
}

/* Style the buttons inside the tab */
div.tab button {
    background-color: inherit;
    float: left;
    border: none;
    outline: none;
    cursor: pointer;
    padding: 14px 16px;
    transition: 0.3s;
    color: #b0b0b0;
    font-size: 14px;
}

/* Change background color of buttons on hover */
div.tab button:hover {
    background-color: #444444;
    color:#fff;
}

/* Create an active/current tablink class */
div.tab button.active {
    background-color: #444444;
    color:#fff;
}

/* Style the tab content */
.tabcontent {
    display: none;
    padding: 6px 12px;
    border: 1px solid #ccc;
    border-top: none;
}

#topology {
    height: 600px;
    border: 1px solid;
}

.configuration {
    color: #444444;
    text-decoration: none;
    font-weight: 500;
    padding-left: 17px;
}

.console {
    color: #444444;
    text-decoration: none;
    font-weight: 500;
    padding-left: 17px;
}

.connectButton {
    cursor: pointer;
    width: 125px;
    height: 35px;
    border-radius: 30px;
    text-align: center;
    letter-spacing: .9px;
    font-weight: bold;
    line-height: 27px;
    color: #ffffff;
    background-color: #444444;
    border: solid 2px #444444;
    text-transform: uppercase;
    font-size: 10px;
}

.connectButton:hover {
    outline:0px;
}

.title {
    color: #444444;
}