@import url('https://fonts.googleapis.com/css2?family=Reddit+Mono:wght@200..900&display=swap');
@import url('https://unpkg.com/normalize.css') layer(normalize);
/* @import 'normalize.css' layer(normalize); */
@layer normalize, base, demo, layers;

@layer layers {
  :root {
    --move: 0.5s;
    --clip: text;
  }
  body {
    overflow-x: hidden;
  }
  [data-unclip='true'] {
    --clip: border-box;
  }
  blockquote {
    --step: 200px;
    transform-style: preserve-3d;
    transition: transform var(--move) var(--move);

    h2:nth-of-type(1) {
      transition: opacity var(--move) var(--move);
    }
  }
  blockquote [aria-hidden] {
    position: absolute;
  }

  blockquote h2::after {
    position: absolute;
    opacity: 0;
    top: 50%;
    left: calc(100% + 2ch);
    translate: 0 -50%;
    transition: opacity var(--move);
  }

  blockquote h2:nth-of-type(1)::after {
    content: 'Result';
  }
  blockquote h2:nth-of-type(2)::after {
    content: 'Quote layer';
  }
  blockquote h2:nth-of-type(3)::after {
    content: 'Author layer';
  }
  blockquote h2:nth-of-type(4)::after {
    content: 'Cursor layer';
  }

  blockquote [aria-hidden] {
    outline: 0.1em dashed #0000;
    outline-offset: 0.1em;
    opacity: 0;
    transform-style: preserve-3d;
    transition-property: transform, outline-color, opacity;
    transition-duration: var(--move);
    transition-delay: 0;
  }

  [data-show-layers='true'] {
    blockquote {
      transform: rotateX(-30deg) rotateY(-32deg)
        translate3d(0, calc(var(--step) * 1.5), 0) rotateX(90deg);
      transition: transform var(--move);
    }

    blockquote h2::after {
      opacity: 1;
      transition: opacity var(--move) var(--move);
    }

    h2:nth-of-type(1) {
      opacity: 0.5;
      transition: opacity var(--move);
    }

    [aria-hidden] {
      outline-color: canvasText;
      opacity: 1;
      transform: translate3d(0, 0, calc(var(--depth, 0) * var(--step)));
      transition-property: transform, outline-color, opacity;
      transition-duration: var(--move);
      transition-delay: var(--move);
    }

    [aria-hidden]:nth-of-type(2) {
      --depth: 1;
      span {
        background: linear-gradient(canvasText 0 0) 0 0 /
          calc(min(var(--position), var(--text-length) - 13) * 1ch) 100%
          no-repeat var(--clip) !important;
      }
    }
    [aria-hidden]:nth-of-type(3) {
      --depth: 2;
      span {
        background: linear-gradient(
            color-mix(in hsl, canvasText, #0000 25%) 0 0
          )
          calc((var(--text-length) - 13) * 1ch) 0 /
          calc((var(--position) - (var(--text-length) - 13)) * 1ch) 100%
          no-repeat var(--clip) !important;
      }
    }
    [aria-hidden]:nth-of-type(4) {
      --depth: 3;
      span {
        background: linear-gradient(
            hsl(
                var(--cursor-hue) calc(var(--cursor-saturation) * 1%)
                  calc(var(--cursor-lightness) * 1%) /
                  calc(var(--alpha) + var(--velocity))
              )
              0 0
          )
          calc((var(--position) + 0.05) * 1ch) 50% / 0.95ch 1lh no-repeat
          border-box !important;
      }
    }
  }
}

@layer animation {
  :root {
    --cursor-hue: 320;
    --cursor-saturation: 100;
    --cursor-lightness: 50;
  }
  @property --idx {
    syntax: '<number>';
    inherits: true;
    initial-value: 0;
  }
  @property --alpha {
    syntax: '<number>';
    inherits: true;
    initial-value: 0;
  }
  @property --scrub {
    initial-value: 0;
    inherits: true;
    syntax: '<number>';
  }
  @property --velocity {
    initial-value: 0;
    inherits: true;
    syntax: '<number>';
  }

  @supports (animation-timeline: view()) and (animation-range: 0 100%) {
    main section:first-of-type {
      view-timeline: --header;
    }
    h2 span {
      --velocity: round(
        up,
        clamp(
          0,
          max(
            calc(var(--idx) - var(--scrub)),
            calc(-1 * (var(--idx) - var(--scrub)))
          ),
          1
        ),
        1
      );
      animation-timeline: --header;
      animation-range: exit-crossing 0% entry-crossing 100%;
    }

    h2 {
      animation: index both steps(calc(var(--text-length) + 0));
      animation-timeline: --header;
      animation-range: exit-crossing 0% entry-crossing 100%;
    }
  }

  h2 span {
    --position: min(var(--idx), var(--text-length) - 1);
    white-space: break-spaces;
    background: linear-gradient(
          hsl(
              var(--cursor-hue) calc(var(--cursor-saturation) * 1%)
                calc(var(--cursor-lightness) * 1%) /
                calc(var(--alpha) + var(--velocity))
            )
            0 0
        )
        calc((var(--position) + 0.05) * 1ch) 50% / 0.95ch 1lh no-repeat
        border-box,
      linear-gradient(canvasText 0 0) 0 0 /
        calc(min(var(--position), var(--text-length) - 13) * 1ch) 100% no-repeat
        var(--clip),
      linear-gradient(color-mix(in hsl, canvasText, #0000 25%) 0 0)
        calc((var(--text-length) - 13) * 1ch) 0 /
        calc((var(--position) - (var(--text-length) - 13)) * 1ch) 100% no-repeat
        var(--clip);
    color: transparent;
    transition: --scrub 0.2s;
  }
  :root {
    animation: blink calc(var(--cursor-blink, 0.8) * 1s) infinite;
  }
  @keyframes blink {
    50% {
      --alpha: 1;
    }
  }
  @keyframes index {
    to {
      --idx: var(--text-length);
      --scrub: var(--text-length);
    }
  }
}

@layer demo {
  html {
    scrollbar-color: hsl(
        var(--cursor-hue) calc(var(--cursor-saturation) * 1%)
          calc(var(--cursor-lightness) * 1%)
      )
      #0000;
  }

  h1,
  h2 {
    --font-level: 2.2;
  }
  header,
  main,
  footer {
    font-family: 'Reddit Mono', monospace;
    text-transform: uppercase;
    font-weight: 300;
  }

  header {
    min-height: 100vh;
    display: flex;
    place-items: center;
    justify-content: center;
  }

  footer {
    font-size: 0.875rem;
    padding: 1rem;
    text-align: center;
    opacity: 0.5;
  }

  main section:first-of-type {
    min-height: 200vh;
  }
  main section:last-of-type {
    --font-level: 2.2;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    place-items: center;
    flex-direction: column;
    width: 30ch;
    max-width: calc(100% - 2rem);
    margin: 0 auto;
    opacity: 0.7;
  }

  ::selection {
    color: canvasText;
    background: hsl(
      var(--cursor-hue) calc(var(--cursor-saturation) * 1%)
        calc(var(--cursor-lightness) * 1%)
    );
  }

  p a {
    color: inherit;
    text-decoration: none;

    &:hover {
      color: hsl(
        var(--cursor-hue) calc(var(--cursor-saturation) * 1%)
          calc(var(--cursor-lightness) * 1%)
      );
    }
  }

  hr {
    border-color: hsl(
      var(--cursor-hue) calc(var(--cursor-saturation) * 1%)
        calc(var(--cursor-lightness) * 1%)
    );
  }

  main section:last-of-type div {
    --font-level: 2.2;
    display: grid;
    align-self: start;

    hr {
      flex: 1;
      width: 100%;
    }

    p {
      margin: 0;

      &:last-of-type {
        opacity: 0.5;
      }
    }

    svg {
      width: 50%;
      margin-left: auto;
      margin-top: 2em;
      rotate: 10deg;
    }
  }

  h1,
  h2 {
    --font-level: 2.2;
    font-weight: 300;
    opacity: 0.7;
    margin: 0;
    width: 30ch;
    max-width: calc(100% - 2rem);
    position: relative;
  }

  h1::after {
    content: '';
    position: absolute;
    width: 1ch;
    height: 1lh;
    background: hsl(
      var(--cursor-hue) calc(var(--cursor-saturation) * 1%)
        calc(var(--cursor-lightness) * 1%)
    );
    opacity: var(--alpha);
  }

  main blockquote {
    position: sticky;
    top: 0;
    min-height: 100vh;
    display: flex;
    place-items: center;
    margin: 0;
    justify-content: center;
  }
}

@layer base {
  :root {
    --font-size-min: 16;
    --font-size-max: 20;
    --font-ratio-min: 1.2;
    --font-ratio-max: 1.33;
    --font-width-min: 375;
    --font-width-max: 1500;
  }

  html {
    color-scheme: light dark;
  }

  [data-theme='light'] {
    color-scheme: light only;
  }

  [data-theme='dark'] {
    color-scheme: dark only;
  }

  :where(.fluid) {
    --fluid-min: calc(
      var(--font-size-min) * pow(var(--font-ratio-min), var(--font-level, 0))
    );
    --fluid-max: calc(
      var(--font-size-max) * pow(var(--font-ratio-max), var(--font-level, 0))
    );
    --fluid-preferred: calc(
      (var(--fluid-max) - var(--fluid-min)) /
        (var(--font-width-max) - var(--font-width-min))
    );
    --fluid-type: clamp(
      (var(--fluid-min) / 16) * 1rem,
      ((var(--fluid-min) / 16) * 1rem) -
        (((var(--fluid-preferred) * var(--font-width-min)) / 16) * 1rem) +
        (var(--fluid-preferred) * var(--variable-unit, 100vi)),
      (var(--fluid-max) / 16) * 1rem
    );
    font-size: round(var(--fluid-type), 0.1rem);
  }

  *,
  *:after,
  *:before {
    box-sizing: border-box;
  }

  body {
    background: light-dark(white, black);
    font-family: 'SF Pro Text', 'SF Pro Icons', 'AOS Icons', 'Helvetica Neue',
      Helvetica, Arial, sans-serif, system-ui;
  }

  body::before {
    --size: 45px;
    --line: color-mix(in lch, canvasText, transparent 70%);
    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(-20deg, transparent 50%, white);
    top: 0;
    transform-style: flat;
    pointer-events: none;
    z-index: -1;
  }

  .bear-link {
    color: canvasText;
    position: fixed;
    top: 1rem;
    left: 1rem;
    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%;
  }

  /* Utilities */
  .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;
  }
}

div.tp-dfwv {
  position: fixed;
  width: 280px;
}