@charset "utf-8";
table {
    width: 100%;
    margin: 20px auto;
    border-collapse: collapse;
    text-align: left;
}

th, td {
    padding: 10px;
    border: 1px solid #ddd;
}

th {
    background-color: #f4f4f4;
}

.online {
    color: green;
}

.offline {
    color: red;
}