.tab-group{
    display: flex;
}
.tab{
    flex-grow: 1;
    list-style:none;
    text-align:center;
    cursor:pointer;
}
.panel-group{
    height:100px;
}
.panel{
    display:none;
}
.tab.is-active{
    background:#F00;
    transition: all 0.2s ease-out;
}
.panel.is-show{
    display:block;
}

