@import url('http://fonts.googleapis.com/css?family=Poppins:100,200,300,400,500,600,700,800,900');
*
{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family:'Poppins',sans-serif;
}
:root{
    --clr:#222327;
    --clr0:#050505;
}
body{
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    /*background: var(--clr);*/
}
.container{
    display: flex;
    justify-content:center;
    align-items: center;
    width: 420px;
    height:600px;
    background: var(--clr)
}
.navigation{
    width: 400px;
    height:70px;
    background: #fff;
    border-radius: 10px;
    /*position: relative;*/
    
}
.navigation ul{
    display: flex;
    width: 350px;
}
.navigation ul li{
    position: relative;
    list-style: none;
    width: 70px;
    height:70px;
    z-index: 1;
}
.navigation ul li a{
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    width:100%;
    text-align: center;
    font-weight: 500;
}
.navigation ul li a .icon{
    position: relative;
    display: block;
    line-height: 75px;
    font-size: 1.5em;
    text-align: center;
    transition: 0.5s;
    color: var(--clr);
}
.navigation ul li.active a .icon{
    transform: translateY(-35px);
}
.navigation ul li a .text{
    position: absolute;
    color: var(--clr);
    font-weight: 400;
    font-size: 0.75em;
    letter-spacing: 0.05em;
    transition: 0.5s;
    opacity: 0;
    transform: translateY(20px);
}
.navigation ul li.active a .text{
    opacity: 1;
    transform: translateY(10px);
}
.indicator{
    position: absolute;
    top: 42.5%;
    width: 70px;
    height: 70px;
    background: #29fd53;
    border-radius: 50%;
    border: 6px solid var(--clr);
    transition: 0.5s;
}
.indicator::before{
    content: '';
    position: absolute;
    top: 50%;
    width: 22px;
    height: 22px;
    left: -22px;
    /*background: #f00;*/
    border-top-right-radius: 20px;
    box-shadow: 0px -10px 0 0 var(--clr);
}
.indicator::after{
    content: '';
    position: absolute;
    top: 50%;
    width: 22px;
    height: 22px;
    right: -22px;
    /*background: #f00;*/
    border-top-left-radius: 20px;
    box-shadow: 0px -10px 0 0 var(--clr);
}

.navigation ul li:nth-child(1).active ~ .indicator{
    transform: translateX(calc(70px*0));
}
.navigation ul li:nth-child(2).active ~ .indicator{
    transform: translateX(calc(70px*1));
}
.navigation ul li:nth-child(3).active ~ .indicator{
    transform: translateX(calc(70px*2));
}
.navigation ul li:nth-child(4).active ~ .indicator{
    transform: translateX(calc(70px*3));
}
.navigation ul li:nth-child(5).active ~ .indicator{
    transform: translateX(calc(70px*4));
}