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

@layer normalize, base, demo;

@layer demo {
  :root {
    --bg: light-dark(white, black);
    --bd-top: light-dark(hsl(0 0% 90%), hsl(0 0% 50%));
    --bd-bottom: light-dark(hsl(0 0% 40% / 0.5), black);
    --color: light-dark(hsl(0 0% 10%), hsl(0 0% 90%));
    --tip: light-dark(
      color-mix(in hsl, var(--bg), canvasText 5%),
      color-mix(in hsl, var(--bg), canvasText 25%)
    );
    --tip-height: 2rem;
    --ease-in: linear(
      0 0%,
      0.0039 6.25%,
      0.0156 12.5%,
      0.0352 18.75%,
      0.0625 25%,
      0.0977 31.25%,
      0.1407 37.5%,
      0.1914 43.74%,
      0.2499 49.99%,
      0.3164 56.25%,
      0.3906 62.5%,
      0.5625 75%,
      0.7656 87.5%,
      1 100%
    );
    --ease: ease;
  }
  .nav li {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    position: relative;

    &::after {
      content: '';
      position: absolute;
      inset: -1px 0;
    }
  }
  .nav {
    opacity: 0;
    height: 42px;
    color: var(--color);
    box-shadow: 0 4px 8px 0 hsl(0 0% 0% / 0.2);
    position: fixed;
    bottom: 3rem;
    left: 50%;
    translate: 0% 0;
    margin-left: calc(var(--width) * -0.5px);
    border-radius: 100px;
    background: linear-gradient(var(--bg), var(--bg)) padding-box,
      linear-gradient(var(--bd-top), var(--bd-bottom)) border-box;
    border: 1px solid #0000;
    transition: opacity 0s var(--transition);
  }
  nav button {
    color: canvasText;
    position: absolute;
    left: 0;
    top: 0;
    translate: -100% -50%;
    opacity: 0.25;
    transition: opacity calc(var(--speed) * 1s);

    &:is(:hover, :active) {
      opacity: 1;
    }
  }
  .nav:has(ul:is(:hover, :focus-within)) button {
    opacity: 0;
  }
  .nav :where(a, button) {
    width: 32px;
    aspect-ratio: 1;
    border-radius: 50%;
    display: grid;
    place-items: center;
    text-decoration: none;
    border: 0;
    cursor: pointer;
    font-weight: 500;
    color: inherit;
    background: transparent;

    &:is(:focus-visible) {
      outline-color: transparent;
      outline-width: 0px;
      background: var(--tip);
    }
  }
  .nav ul {
    display: flex;
    padding: 0;
    margin: 0;
    list-style-type: none;
  }
  li svg {
    width: 24px;
  }

  /* Positioning stuff */
  .nav {
    anchor-name: --nav;
  }
  .tip {
    position: fixed;
    position-anchor: --nav;
    background: var(--tip);
    color: var(--color);
    font-size: 0.875rem;
    border-radius: 100px;
    width: 100px;
    pointer-events: none;
    overflow: hidden;
    border: 1px solid
      light-dark(
        color-mix(in hsl, var(--bd-top), canvasText 15%),
        color-mix(in hsl, var(--bd-top), canvasText 15%)
      );
    height: var(--tip-height);
    z-index: 999999999;
  }

  .x {
    width: 18px;
  }

  [data-debug='true'] .tip {
    overflow: visible;

    .tip__track {
      outline: 1px dashed orange;
      outline-offset: 1px;
    }

    .tip__track div {
      opacity: 1;
      outline: 1px dashed red;
    }
  }

  .tip__track {
    display: grid;
    height: var(--tip-height);
  }

  [data-flow='horizontal'] .tip,
  [data-flow='auto'][data-orientation='horizontal'] .tip {
    .tip__track {
      grid-auto-flow: column;
      grid-auto-columns: 100%;
    }
  }

  .tip__track div {
    height: var(--tip-height);
    padding-inline: 0.5rem;
    display: grid;
    place-items: center;
  }
  .tip {
    position-try-fallbacks: flip-block, flip-inline;
  }
  [data-locked='true'][data-orientation='horizontal'] {
    .tip {
      left: anchor(left);
      bottom: calc(anchor(top) + 1rem);
      translate: 21px 0;
    }
  }
  [data-locked='true'][data-orientation='vertical'] {
    .tip {
      left: calc(anchor(right) + 1rem);
      bottom: unset;
      top: anchor(top);
      translate: 0 21px;
    }
  }

  [data-locked='false'][data-orientation='horizontal'] .tip {
    left: anchor(left);
    bottom: calc(anchor(top) + 1rem);
    translate: calc(-50% + (var(--tip-x) * 1px)) calc(var(--tip-y) * 1px + -50%);
  }

  [data-locked='false'][data-orientation='vertical'] .tip {
    left: calc(anchor(right) + 1rem);
    top: anchor(top);
    bottom: unset;
    translate: calc(-1rem + (var(--tip-x) * 1px))
      calc(var(--tip-y) * 1px + -50%);
  }

  [data-orientation='vertical'] {
    nav {
      width: 42px;
      height: fit-content;
      margin-left: 0;

      ul {
        flex-direction: column;
      }
    }
  }

  /* :has() hovering stuff */
  :root:has(nav li:nth-of-type(1):is(:hover, :focus-within)) {
    --active: 1;
    .tip__track div:nth-of-type(1) {
      --shown: 1;
    }
  }
  :root:has(nav li:nth-of-type(2):is(:hover, :focus-within)) {
    --active: 2;
    .tip__track div:nth-of-type(2) {
      --shown: 1;
    }
  }
  :root:has(nav li:nth-of-type(3):is(:hover, :focus-within)) {
    --active: 3;
    .tip__track div:nth-of-type(3) {
      --shown: 1;
    }
  }
  :root:has(nav li:nth-of-type(4):is(:hover, :focus-within)) {
    --active: 4;
    .tip__track div:nth-of-type(4) {
      --shown: 1;
    }
  }
  :root:has(nav li:nth-of-type(5):is(:hover, :focus-within)) {
    --active: 5;

    .tip__track div:nth-of-type(5) {
      --shown: 1;
    }
  }
  :root:has(nav li:nth-of-type(6):is(:hover, :focus-within)) {
    --active: 6;

    .tip__track div:nth-of-type(6) {
      --shown: 1;
    }
  }

  .tip {
    scale: var(--show, 0);
    filter: blur(calc(var(--blur, 0) * 1px)));
    transition: scale calc(var(--speed) * 1s) var(--ease),
      filter calc(var(--speed) * 1s) ease;
  }

  [data-flow='horizontal'] .tip__track,
  [data-flow='auto'][data-orientation='horizontal'] .tip__track {
    translate: calc((var(--active) - 1) * (-100%)) 0;
  }
  [data-flow='vertical'] .tip__track,
  [data-flow='auto'][data-orientation='vertical'] .tip__track {
    translate: 0 calc((var(--active) - 1) * (var(--tip-height) * -1));
  }

  .tip__track {
    transition: translate calc(var(--speed) * 1s) calc(var(--speed) * 1s)
      var(--ease);
  }

  .tip__track div {
    filter: blur(calc((var(--blur, 0) * 1px) * (1 - var(--shown, 0))));
    opacity: var(--shown, 0);
    transition: filter calc(var(--speed) * 1s) var(--ease-in),
      opacity calc(var(--speed) * 1s) var(--ease);
  }

  :root:has(.nav ul:is(:hover, :focus-within)) {
    .tip {
      --show: 1;
      filter: blur(0);
    }
    .tip__track {
      transition-delay: 0s;
    }
  }
}

@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: var(--fluid-type);
  }

  *,
  *: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;
  }

  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;
  }
}