style.css

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@500&display=swap');

:root {
    --nav-height: 5rem;
    --bg: red;
    --icon-size: calc(var(--nav-height) / 2);
    --anim-speed: 0.5s;
}

* {
    transition: all var(--anim-speed);
    box-sizing: border-box;
}

body {
    background-color: var(--bg);
    /* centering */
    display: grid;
    place-items: center;
    height: 100vh;
    width: 100vw;
    /* solving the issue of scrollbar */
    margin: 0;
}

nav {
    display: flex;
    background-color: white;
    height: var(--nav-height);
    padding: 0 var(--icon-size);
    gap: var(--icon-size);
    border-radius: var(--nav-height);
}

.icon {
    --disabled-color: grey;
    font-size: var(--icon-size);
    color: var(--disabled-color);
}

.icon-div {
    display: flex;
    height: 100%;
    align-items: center;
    position: relative;
}

.icon-div.active .icon {
    color: var(--bg);
}

.icon-div:active {
    --angle: 20deg;
    transform: rotate(var(--angle));
}

.icon-div::before {
    --top-visible: calc(-1 * var(--nav-height) / 3);
    content: attr(data-text);
    position: absolute;
    top: 0;
    z-index: -1;
    left: 50%;
    transform: translateX(-50%);
    font-family: poppins;
    width: max-content;
    opacity: 0;
}

.icon-div.active::before {
    animation: showDataText calc(var(--anim-speed) * 3);
}

@keyframes showDataText {
    from {
        top: 0;
        opacity: 0;
    }
    30% {
        top: var(--top-visible);
        opacity: 1;
    }
    80% {
        top: var(--top-visible);
        opacity: 1;
    }
    to {
        top: 0;
        opacity: 0;
    }
}