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css

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html

<svg style="display: none;" viewBox="0 0 100 100" width="100" height="100">
    <g id="home">
        <g
            fill="none"
            stroke="currentColor"
            stroke-width="15"
            transform="translate(7.5 7.5)">
            <g transform="translate(0 6.25)">
                
                <path stroke-linejoin="round" stroke-linecap="round" d="M 42.5 0 l 37.5 20 v 52.5 h -75 v -52.5 z"></path>
            </g>
        </g>
    </g>
    <g id="favorites">
        <g
            fill="none"
            stroke="currentColor"
            stroke-width="15"
            transform="translate(7.5 7.5)">
            <g transform="translate(0 6.25)">
                <path stroke-linejoin="round" stroke-linecap="round" d="M 37.5 7.5 a 10 10 0 0 0 10 0 a 15 15 0 0 1 30 30 l -35 35 l -35 -35 a 15 15 0 0 1 30 -30"></path>
            </g>
        </g>
    </g>
    <g id="settings">
        <g
            fill="none"
            stroke="currentColor"
            stroke-width="15"
            transform="translate(7.5 7.5)">
            <g transform="translate(0 6.25)">
                <circle
                    r="15"
                    cx="15"
                    cy="15">
                </circle>
                <path stroke-linecap="round" d="M 37.5 15 h 37.5"></path>
                <circle
                    r="15"
                    cx="70"
                    cy="57.5">
                </circle>
                <path stroke-linecap="round" d="M 47.5 57.5 h -37.5"></path>
            </g>
        </g>
    </g>
</svg>

<nav class="favorites">
    <a href="#home">
        <svg aria-hidden="true" viewBox="0 0 100 100" width="40" height="40">
            <use href="#home"></use>
        </svg>
        <span>Home</span>
    </a>
    <a href="#favorites">
        <svg aria-hidden="true" viewBox="0 0 100 100" width="40" height="40">
            <use href="#favorites"></use>
        </svg>
        <span>Favorites</span>
    </a>
    <a href="#settings">
        <svg aria-hidden="true" viewBox="0 0 100 100" width="40" height="40">
            <use href="#settings"></use>
        </svg>
        <span>Settings</span>
    </a>

<svg id="graticulate" viewBox="0 0 300 100">
        <defs>
            <linearGradient id="graticulate-gradient" x1="0.5" x2="0.5" y1="0" y2="1">
                <stop stop-color="#000" offset="0"></stop>
                <stop stop-color="#222" offset="1"></stop>
            </linearGradient>
            <mask id="graticulate-mask">
                <rect
                    x="0"
                    y="0"
                    width="300"
                    height="100"
                    fill="url(#graticulate-gradient">
                </rect>
            </mask>

css

@import url("https://fonts.googleapis.com/css?family=Poppins:500,600&display=swap");

* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}
body {
  font-family: "Poppins", sans-serif;
  background: linear-gradient(to bottom, hsl(250, 14%, 9%), hsl(250, 20%, 15%));
  /* center the nav in the viewport */
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  /* set a perspective for the nested nav */
  perspective: 500px;
}
/* display the anchor links in three columns of equal width */
nav {
  display: grid;
  grid-template-columns: repeat(3, 100px);
  grid-column-gap: 4rem;
  padding: 2rem 3rem;
  justify-items: center;
  align-items: center;
  background: hsl(250, 16%, 26%);
  box-shadow: 0 0 15px hsla(250, 16%, 5%, 0.3);
  border-radius: 30px;
  color: hsl(250, 16%, 90%);
  /* translate the nav element backwards to offset the translation of the anchor links (otherwise the text would be fuzzy) */
  transform: translateZ(-70px);
  transform-origin: 50% 100%;
  /* transition for the transform property
  the navigation is moved around the viewport with 3d transform
  */
  transition-property: transform;
  transition-duration: 1.25s;
  transition-timing-function: cubic-bezier(0.175, 0.885, 0.32, 1.275);
  /* preserve3d to have the transform property on the anchor link retain the 3d space */
  transform-style: preserve-3d;
  /* position relative to absolute position the graticulate */
  position: relative;
}
/* display the nested icon and text element in a column */
nav a {
  display: flex;
  flex-direction: column;
  align-items: center;
  color: inherit;
  text-decoration: none;
  /* by default have the anchor links semitransparent */
  opacity: 0.3;
  /* transition for the change in opacity and transform property */
  transition-property: opacity, transform;
  transition-duration: 0.6s;
  transition-timing-function: cubic-bezier(0.55, 0.085, 0.68, 0.53);
  /* position relative for the pseudo element */
  position: relative;
}
/* with a pseudo element include a circle centered in the link */
nav a:before {
  position: absolute;
  content: "";
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: hsl(250, 16%, 90%);
  /* slightly offset the circle to have the shape closer to the icon than the text */
  top: 40%;
  left: 50%;
  /* by default have the circle scaled out of sight
  ! do not set a transition to have the circle removed without the smooth change
  */
  transform: translate(-50%, -50%) scale(0);
  opacity: 1;
}
nav a svg {
  display: block;
}
nav a span {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05rem;
  padding-top: 1rem;
}
/* absolute position the graticulate behind the navigation */
nav svg#graticulate {
  position: absolute;
  top: 50%;
  left: 50%;
  /* stretch the svg to have the element fake the background */
  height: 150vh;
  width: auto;
  /* rotate the svg to give depth to the environment */
  transform-origin: 50% 100%;
  transform: translate(-50%, -50%) rotateX(30deg);
  z-index: -5;
}

/* set the transform and opacity values for the different states of the navigation */
nav.home {
  transform: translateX(42px) translateZ(-70px) rotateX(2deg) rotateY(-3deg);
}
nav.home a:nth-of-type(1) {
  opacity: 1;
  transform: translateZ(70px);
}

nav.favorites {
  transform: translateZ(-70px) rotateX(1deg);
}
nav.favorites a:nth-of-type(2) {
  opacity: 1;
  transform: translateZ(70px);
}

nav.settings {
  transform: translateX(-42px) translateZ(-70px) rotateX(2deg) rotateY(3deg);
}
nav.settings a:nth-of-type(3) {
  opacity: 1;
  transform: translateZ(70px);
}

/* set up a transition for the circle above the anchor links
included as the elements are selected
*/
nav.home a:nth-of-type(1):before,
nav.favorites a:nth-of-type(2):before,
nav.settings a:nth-of-type(3):before {
  opacity: 0;
  transform: translate(-50%, -50%) scale(1);
  transition-property: opacity, transform;
  transition-duration: 0.6s;
  transition-timing-function: cubic-bezier(0.55, 0.085, 0.68, 0.53);
}
/* add a shadow beneath the svg icons */
nav.home a:nth-of-type(1) svg {
  filter: drop-shadow(5px 2px 2px hsla(250, 16%, 5%, 0.2));
}
nav.favorites a:nth-of-type(2) svg {
  filter: drop-shadow(0 5px 2px hsla(250, 16%, 5%, 0.2));
}
nav.settings a:nth-of-type(3) svg {
  filter: drop-shadow(-5px 2px 2px hsla(250, 16%, 5%, 0.2));
}

JavaScript

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