*,
*::after,
*::before {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue';
}

a {
  -webkit-tap-highlight-color: transparent;
}

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
}

body {
  height: 100vh;
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  place-content: center;
}

@import 'https://unpkg.com/normalize.css' layer(normalize);

@layer base, scroll-stuff;

@layer scroll-stuff {
  @supports (animation-timeline: scroll()) {
    ul {
      gap: 0.5ch;
    }
    li {
      animation: shift both ease-in-out;
      animation-timeline: view();
      animation-range: cover calc(50% - 12rlh) cover calc(50% + 12rlh);
    }

    li:nth-of-type(odd) {
      --shift: -4ch;
    }
    li:nth-of-type(even) {
      --shift: 4ch;
    }

    @keyframes shift {
      50% {
        translate: var(--shift) -50%;
      }
    }

    .collab span:nth-of-type(1),
    .collab span:nth-of-type(3) {
      animation: slide both ease-out;
      animation-timeline: --collab;
      animation-range: entry 100% exit 0;
    }

    @keyframes slide {
      0% {
        translate: var(--origin-x, 0) var(--origin-y, -50%);
        opacity: 0;
      }
    }

    header span:nth-of-type(1) {
      --origin-x: 0;
      --origin-y: 150%;
    }
    header span:nth-of-type(3) {
      --origin-x: 0;
      --origin-y: -250%;
    }
    .collab span:nth-of-type(1) {
      --origin-x: 0;
      --origin-y: -250%;
    }
    .collab span:nth-of-type(3) {
      --origin-x: 0;
      --origin-y: 150%;
    }

    :root {
      timeline-scope: --main;
    }

    main {
      view-timeline: --main;
    }

    header span:nth-of-type(1),
    header span:nth-of-type(3) {
      animation: slide both ease-out reverse;
      animation-timeline: --main;
      animation-range: entry 0 entry 50%;
    }
  }
}

@layer base {
  *,
  *: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;
    color: hsl(0 0% 10%);
    background: white;
  }

  body::before {
    --size: 60px;
    --line: hsl(0 0% 0% / 0.15);
    content: '';
    height: 100vh;
    width: 100vw;
    position: fixed;
    background: linear-gradient(
          90deg,
          var(--line) 1px,
          transparent 1px var(--size)
        )
        50% 50% / var(--size) var(--size),
      linear-gradient(var(--line) 1px, transparent 1px var(--size)) 50% 50% /
        var(--size) var(--size);
    mask: linear-gradient(-15deg, transparent 30%, white);
    top: 0;
    transform-style: flat;
    pointer-events: none;
    z-index: -1;
  }

  body > div {
    width: 100%;
  }

  main {
    padding-bottom: 60vh;
  }

  header {
    min-height: 100vh;
    display: grid;
    align-content: start;
    width: 100%;
    position: sticky;
    top: 0rem;
    mix-blend-mode: difference;
    color: white;
    z-index: 10;
  }

  header,
  section {
    padding: var(--padding);
  }

  :root {
    --padding: 1rem;
    --font: clamp(1.5rem, 4vw + 1rem, 6rem);
  }

  h1,
  h2 {
    font-size: clamp(2rem, 8vw + 1rem, 12rem);
    margin: 0;
    text-transform: uppercase;
    line-height: 1;
    width: 100%;
  }
  h2 {
    text-align: right;
  }

  body > section:last-of-type a {
    font-size: clamp(2rem, 8vw + 1rem, 12rem);
    text-transform: uppercase;
    font-weight: 600;
    text-decoration: none;
    color: black;
    cursor: pointer;
  }

  ul {
    margin: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    font-size: clamp(1.5rem, 2vw + 1rem, 5rem);
    list-style-type: none;
    padding: 0;
    font-weight: 500;
    line-height: 1;
    gap: 0.5ch 4ch;
  }

  li:nth-of-type(odd) {
    text-align: right;
  }

  li:nth-of-type(1),
  li:nth-of-type(2) {
    text-transform: uppercase;
    font-weight: 600;
    text-decoration: underline;
  }
  li:nth-of-type(1) {
    translate: 0.25ch 0;
  }
  li:nth-of-type(2) {
    translate: -0.25ch 0;
  }

  section {
    min-height: 100vh;
    display: grid;
    place-items: center;
    width: 100%;
  }
  .collab {
    place-items: center;
    position: sticky;
    top: 0;
    padding: 0;
    view-timeline-name: --collab;
    pointer-events: none;
  }

  .collab img {
    position: absolute;
    bottom: 100%;
    width: 25vmin;
    right: var(--padding);
    min-width: 200px;
  }

  header h2,
  .collab h2 {
    text-align: center;
    position: absolute;
    top: 50%;
    left: 50%;
    translate: -50% -50%;
    font-size: var(--font);
    width: auto;
  }

  header span:nth-of-type(1),
  header span:nth-of-type(3),
  .collab span:nth-of-type(1),
  .collab span:nth-of-type(3) {
    position: absolute;
    /* 		font-size: clamp(2rem, 8vw + 1rem, 12rem); */
    top: 50%;
    translate: 0 -50%;
  }
  header span:nth-of-type(1),
  header span:nth-of-type(3) {
    font-size: var(--font);
  }

  header span:nth-of-type(1),
  .collab span:nth-of-type(1) {
    right: calc(100% + 0.2ch);
  }
  header span:nth-of-type(3) {
    color: hsl(180 80% 40%);
  }
  header span:nth-of-type(3),
  .collab span:nth-of-type(3) {
    left: calc(100% + 0.2ch);
  }

  .collab span:nth-of-type(1) {
    color: hsl(10 80% 50%);
  }

  header span:nth-of-type(2),
  .collab span:nth-of-type(2) {
    font-size: var(--font);
    opacity: 0;
  }

  body > section:last-of-type {
    place-items: end;
    height: 50vh;
  }

  footer {
    padding: var(--padding);
  }

  .amp {
    position: fixed;
    top: 50%;
    left: 50%;
    translate: -50% -50%;
    font-size: var(--font);
    font-weight: 600;
  }

  .bear-link {
    color: canvasText;
    position: fixed;
    top: var(--padding);
    right: var(--padding);
    width: 48px;
    aspect-ratio: 1;
    display: grid;
    place-items: center;
    opacity: 0.8;
  }

  :where(.x-link, .bear-link):is(:hover, :focus-visible) {
    opacity: 1;
  }
  .bear-link svg {
    width: 75%;
  }

  .characters {
    display: flex;
  }

  body > section:last-of-type a:is(:hover, :focus-visible) .characters span {
    color: hsl(10 80% 50%);
  }

  body > section:last-of-type a:is(:hover, :focus-visible) .characters span {
    animation: change 0.35s both
      linear(
        0,
        0.007 5.35%,
        0.0282 10.75%,
        0.0638 16.26%,
        0.1144 21.96%,
        0.1833 28.16%,
        0.2717 34.9%,
        0.6868 62.19%,
        0.775 68.54%,
        0.8457 74.3%,
        0.9141 81.07%,
        0.9621 87.52%,
        0.9905 93.8%,
        1
      );
    animation-delay: calc(sin((var(--index) / 8) * 45deg) * 0.35s);
  }

  @keyframes change {
    50% {
      translate: 0 -50%;
    }
  }

  .characters span:nth-of-type(1) {
    --index: 1;
  }
  .characters span:nth-of-type(2) {
    --index: 2;
  }
  .characters span:nth-of-type(3) {
    --index: 3;
  }
  .characters span:nth-of-type(4) {
    --index: 4;
  }
  .characters span:nth-of-type(5) {
    --index: 5;
  }
  .characters span:nth-of-type(6) {
    --index: 6;
  }
  .characters span:nth-of-type(7) {
    --index: 7;
  }
  .characters span:nth-of-type(8) {
    --index: 8;
  }

  .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
  }
}