HTMLify

@import url("https://fonts.googleapis.com/css?family=DM+Sans:500,700&display=swap");

* {
    box-sizing: border-box;
}

body {
    text-align: center;
    display: grid;
    height: 100vh;
    width: 100%;
    place-items: center;
    padding: 0 20px;
    background: #151515;
}

.nav {
    display: inline-flex;
    position: relative;
    overflow: hidden;
    max-width: 100%;
    background-color: #fff;
    padding: 0 20px;
    border-radius: 40px;
}

.nav-item {
    color: #151515;
    padding: 20px;
    text-decoration: none;
    transition: 0.3s;
    margin: 0 6px;
    z-index: 1;
    font-family: "DM Sans", sans-serif;
    font-weight: 500;
    position: relative;
}

.nav-item::before {
    content: "";
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 100%;
    height: 5px;
    background-color: #dfe2ea;
    border-radius: 8px 8px 0 0;
    opacity: 0;
    transition: 0.3s;
}

.nav-item:not(.is-active):hover::before {
    opacity: 1;
    bottom: 0;
}

.nav-item:not(.is-active):hover {
    color: #333;
}

.nav-indicator {
    position: absolute;
    left: 0;
    bottom: 0;
    height: 4px;
    transition: 0.4s;
    height: 5px;
    z-index: 1;
    border-radius: 8px 8px 0 0;
}