body{
    margin: 0;
    padding: 0;
    background: rgb(23, 196, 161);
    font-family: sans-serif;
}
ul{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    margin: 0;
    padding: 0;
    background: #fff;
    border-radius: 25px;
    box-shadow: 0 15px 20px rgba(0,0,0,5), 0 0 0 4px #b4004e;
}
ul li{
    list-style: none;
}
ul li a{
    display: block;
    width: 40px;
    height: 40px;
    text-align: center;
    line-height: 40px;
    background: #fff;
    color: #262626;
    text-decoration: none;
    border-radius: 4px;
    margin: 5px;
    box-shadow: inset 0 5px 10px rgb(0,0,0,.1),0 2px 5px rgba(0,0,0,.5);
}
ul li:first-child a{
    border-radius: 20px 0 0 20px;
}
ul li:last-child a{
    border-radius:0 20px 20px 0;
}
ul li a.active,
ul li a:hover{
    background: #ff006a;
    color: #fff;
}