index.css

canvas {
  position: absolute;
  top: 0;
  left: 0;
}
*,
*:after,
*:before {
  box-sizing: border-box;
}

body {
  display: grid;
  place-items: center;
  min-height: 100vh;
  font-family: "SF Pro Text", "SF Pro Icons", "AOS Icons", "Helvetica Neue",
    Helvetica, Arial, sans-serif, system-ui;
  background-size: cover;
  background-position: center bottom;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: hsl(0 0% 0% / 0.75);
  z-index: -1;
}

.controls {
  position: fixed;
  top: 1rem;
  right: 1rem;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.5rem 1rem;
  color: white;
  font-weight: 300;
  align-items: center;
  accent-color: red;
}

label {
  cursor: pointer;
}

.dock {
  --spacing: 1.5rem;
  overflow: hidden;
  resize: horizontal;
  width: 422px;
  min-width: 344px;
  max-width: calc(100% - 2rem);
  max-height: calc(56px + (2 * var(--spacing)));
}

nav {
  display: flex;
  gap: var(--spacing);
  padding: var(--spacing);
  overflow: auto;
  background: hsl(0 0% 40% / 0.5);
  backdrop-filter: blur(4px);
  border-radius: 24px;
  clip-path: inset(0 0 0 0 round 24px);
  scroll-snap-type: x mandatory;
  scrollbar-color: hsl(0 0% 10% / 0.5) transparent;
  scrollbar-width: thin;
  box-shadow: 0 1px hsl(0 0% 100% / 0.5) inset;
  height: 100%;
  width: 100%;
  align-items: center;
}

a {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  background: linear-gradient(hsl(0 0% 100% / 0.15), #0000), hsl(0 0% 4%);
  border-radius: 8px;
  flex: 1 0 auto;
  scroll-snap-align: center;
  width: 56px;
  height: 56px;
  box-shadow: 0 -1px hsl(0 0% 0% / 0.5) inset, 0 2px 4px hsl(0 0% 0% / 0.5),
    0 1px hsl(0 0% 100% / 0.5) inset;
}

:root:has(#blur:checked) a {
  filter: blur(calc(var(--blur, 0) * 24px));
}
:root:has(#parallax:checked) a svg {
  scale: var(--parallax, 0);
}

a svg {
  width: 65%;
  color: white;
  fill: white;
}

:root:has(#direction:checked) nav {
  flex-direction: column;
  scroll-snap-type: y mandatory;
}
:root:has(#direction:checked) .dock {
  flex-direction: column;
  min-width: 0;
  max-height: calc(100vh - 2rem);
  min-height: 340px;
  width: unset;
  resize: vertical;
  max-width: calc(56px + (var(--spacing) * 2));
}

@supports (animation-timeline: scroll()) {
  a {
    animation-name: scale, scale;
    animation-fill-mode: both;
    animation-timing-function: ease-in-out;
    animation-direction: normal, reverse;
    animation-timeline: view(inline);
    animation-range: entry 0% entry 150%, exit -50% exit 100%;
  }

  :root:has(#direction:checked) a {
    animation-timeline: view();
  }

  @keyframes scale {
    0% {
      scale: 0.25;
    }
  }

  @keyframes blur {
    0% {
      scale: 0.25;
      filter: blur(24px);
    }
  }
  :root:has(#blur:checked) a {
    animation-name: blur, blur;
  }

  :root:has(#parallax:checked) a svg {
    scale: 1;
    animation-name: icon, icon;
    animation-fill-mode: both;
    animation-timing-function: ease-in;
    animation-direction: normal, reverse;
    animation-timeline: view(inline);
    animation-range: entry -50% entry 250%, exit -150% exit 150%;
  }
  @keyframes icon {
    0% {
      scale: 0;
    }
  }
}