.room-table {
    margin-top: 20px;
}
.join-btn {
    min-width: 120px;
}
#roomsTable tbody td {
    vertical-align: middle;
}
#roomsTable thead th {
    vertical-align: middle;
}
#roomsTable td, #roomsTable th {
    text-align: center;
}
.cell-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 100%;
}