.tabs {
    border: 1px solid rgba(175,175,175,0.5);
    border-radius: 4px;
    margin: 15px 0;
}
.tabs > ul {
    list-style: none;
    display: flex;
    margin: 0;
    padding: 0;
}
.tabs > ul li {
    flex-grow: 1;
    padding: 0;
}
.tabs > ul li a{
    display: block;
    padding: 15px;
    text-align: center; 
    border-right: 1px solid rgba(175,175,175,0.5);
    border-bottom: 1px solid rgba(175,175,175,0.5);
    background: rgba(175,175,175,0.3)
} 
.tabs > ul li:last-child a {
    border-right-color: transparent; ;
}
.tabs > ul li a.active {
    border-bottom-color: transparent; 
    background: #FFF;
    color: #666
}
.tabs > div {
    padding: 30px;
    display: none;
}
.tabs > div.active {
    display: block;
}