HTMLify

* {
    padding: 0;
    margin: 0;
}

html {
    height: 100%;
}

.d-flex {
    display: flex;
}

.align-items-center {
    align-items: center;
}

.justify-content-center {
    justify-content: center;
}

.flex-column {
    flex-direction: column;
}

body {
    background-color: #fff;
    height: 100%;
    font-family: "Roboto", sans-serif;
}

.container {
    background-color: #432740;
    flex-grow: 1;
}

nav {
    width: 100%;
    max-width: 450px;
    background-color: #fff;
    border-radius: 50px;
}

nav ul {
    list-style-type: none;
    padding: 20px;
}

nav li {
    display: inline-flex;
    width: 33.33%;
    margin-right: -4px;
}

nav a {
    text-decoration: none;
    position: relative;
    overflow: hidden;
    padding: 10px 0;
}

nav a i {
    position: absolute;
    z-index: 3;
    color: #a25689;
    font-size: 20px;
}

nav a:hover i {
    transition: all 0.4s;
    color: #432740;
}

nav a span {
    color: #432740;
    font-size: 1em;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    z-index: 1;
    transform: translateY(20px);
    position: relative;
}

nav a::after {
    content: "";
    background-color: #fff;
    position: absolute;
    transform: rotate(15deg);
    right: -2px;
    bottom: -14px;
    left: -8px;
    height: 50px;
    z-index: 2;
}

nav a.isActive i {
    transform: translateY(-40px);
    transition: all 0.8s;
}

nav a.isActive span {
    transform: translateY(0);
    transition: all 0.4s ease-in;
}

nav a.isActive:after {
    height: 10px;
    transition: height 1s;
}

nav a.notActive i {
    transform: translateY(0);
    transition: all 0.8s;
}

nav a.notActive span {
    transform: translateY(20px);
    transition: all 0.4s ease-in;
}

nav a.notActive:after {
    height: 50px;
    transition: height 1s;
}