@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Text:ital@0;1&family=Inter:ital,opsz,wght@0,14..32,100..900;1,14..32,100..900&display=swap');
@import url('https://unpkg.com/normalize.css') layer(normalize);

@layer normalize, base, demo, stuck, scroll, debug;

@layer debug {
  .video-container {
    pointer-events: none;
    iframe {
      pointer-events: all;
    }
  }
  [data-stuck][data-debug='true'] .sentinel,
  [data-debug='true'] .video-container::before,
  [data-debug='true'] .video-container::after {
    opacity: 1;
  }
  [data-debug='true'] :is(main, .nav) {
    opacity: 0.4;
  }
  .video-container::before {
    content: '';
    position: absolute;
    inset: 0;
    outline: 2px solid red;
    border-radius: 1rem;
    background: repeating-linear-gradient(
        45deg,
        hsl(0 100% 50% / 0.4) 0 2px,
        #0000 2px 10px
      ),
      hsl(0 100% 50% / 0.05);
    transition: opacity 0.26s ease-out;
    opacity: 0;
  }
  .video-container::after {
    opacity: 0;
    font-family: monospace;
    content: 'sticky holder';
    position: absolute;
    top: 100%;
    left: 2rem;
    color: white;
    text-shadow: 0 1px #222;
    padding: 0.25rem 0.75rem;
    text-transform: uppercase;
    background: hsl(0 100% 50%);
    border-radius: 0 0 6px 6px;
    font-size: 0.875rem;
    transition: opacity 0.26s ease-out;
  }
}

@layer scroll {
  .nav {
    animation: elevate linear both;
    animation-timeline: scroll(root);
    animation-range: 0 calc(var(--nav-height) * 2);
  }
  @keyframes elevate {
    to {
      --shadow-color: 0 0% 0%;
      box-shadow: 0px 0.6px 0.7px hsl(var(--shadow-color) / 0.05),
        0px 1.6px 1.8px -0.6px hsl(var(--shadow-color) / 0.05),
        0px 3.2px 3.6px -1.2px hsl(var(--shadow-color) / 0.05),
        0px 6.5px 7.3px -1.9px hsl(var(--shadow-color) / 0.05),
        0px 12.6px 14.2px -2.5px hsl(var(--shadow-color) / 0.05);
    }
  }
}

@layer stuck {
  :root {
    --gutter: 1;
    --margin: 0.1;
    --content-width: 640px;
    --nav-height: 56px;
    --threshold: calc(
      (
          min(var(--content-width) + 4rem, 100vw - 2rem) * (9 / 16) *
            var(--margin)
        ) * -1
    );
    /* --threshold: -100px; */
  }

  .sentinel {
    position: absolute;
    height: 2px;
    width: calc(100% + 4rem);
    background: red;
    z-index: 20;
    left: 50%;
    translate: -50% -50%;
    top: calc(var(--threshold) * -1);
    opacity: 0;
    transition: opacity 0.26s ease-out;

    &::after {
      content: 'sentinel';
      text-transform: uppercase;
      font-family: monospace;
      text-shadow: 0 1px #222;
      background: hsl(0 100% 50%);
      position: absolute;
      top: 50%;
      left: calc(100% - 1rem);
      padding: 0.25rem 0.75rem;
      color: white;
      translate: 0 -50%;
    }
  }

  .video-backdrop {
    width: calc(var(--content-width) + 4rem);
    aspect-ratio: 16 / 9;
    position: absolute;
    top: var(--nav-height);
    background: blue;
    left: 50%;
    translate: -50% 0;
    border-radius: 1rem;
    background: color-mix(in oklch, canvas, canvasText 2%);
    box-shadow: inset 0 -2px 6px -2px color-mix(in oklch, canvasText, #0000 80%);
  }

  .video-container {
    width: calc(var(--content-width) + 4rem);
    max-width: calc(100vw - 2rem);
    aspect-ratio: 16 / 9;
    margin: 0 auto;
    position: sticky;
    top: var(--threshold);

    iframe {
      border-radius: 1rem;
      width: 100%;
      transition-property: width, transform, box-shadow, border-radius;
      transition-timing-function: ease-out;
      transition-duration: calc(var(--duration) * 1s);
      width: 100%;
      aspect-ratio: 16 / 9;
      position: absolute;
      left: 50%;
      top: 0%;
      transform: translate(-50%, 0%);
    }
  }

  [data-stuck='true'] {
    .video-container::after {
      content: 'sticky holder [stuck]' !important;
    }
    .video-container iframe {
      width: calc(var(--width) * 1px);
      border-radius: 6px;
      transition-timing-function: ease-in-out;
      --shadow-color: 0 0% 0%;
      box-shadow: 0px 0.6px 0.7px hsl(var(--shadow-color) / 0.1),
        0px 1.6px 1.8px -0.6px hsl(var(--shadow-color) / 0.1),
        0px 3.2px 3.6px -1.2px hsl(var(--shadow-color) / 0.1),
        0px 6.5px 7.3px -1.9px hsl(var(--shadow-color) / 0.1),
        0px 12.6px 14.2px -2.5px hsl(var(--shadow-color) / 0.1);
      transform: translate(-50%, 0%)
        translate(
          calc(50vw - (50% + (var(--gutter) * 1rem))),
          calc((100vh - var(--threshold)) - (100% + (var(--gutter) * 1rem)))
        );
    }
  }

  @supports (container-type: scroll-state) {
    .video-container {
      container-type: scroll-state;
    }
    @container scroll-state(stuck: top) {
      .video-container::after {
        content: 'sticky holder [stuck]' !important;
      }
      .video-container iframe {
        width: calc(var(--width) * 1px);
        border-radius: 6px;
        transition-timing-function: ease-in-out;
        --shadow-color: 0 0% 0%;
        box-shadow: 0px 0.6px 0.7px hsl(var(--shadow-color) / 0.1),
          0px 1.6px 1.8px -0.6px hsl(var(--shadow-color) / 0.1),
          0px 3.2px 3.6px -1.2px hsl(var(--shadow-color) / 0.1),
          0px 6.5px 7.3px -1.9px hsl(var(--shadow-color) / 0.1),
          0px 12.6px 14.2px -2.5px hsl(var(--shadow-color) / 0.1);
        transform: translate(-50%, 0%)
          translate(
            calc(50vw - (50% + (var(--gutter) * 1rem))),
            calc((100vh - var(--threshold)) - (100% + (var(--gutter) * 1rem)))
          );
      }
    }
  }
  .video-container {
    z-index: 10;
  }
}

@layer demo {
  body {
    display: block;
    font-family: 'Inter', sans-serif;
  }
  main p:not(:last-of-type):not(:has(+ ul)) {
    margin-bottom: 2rem;
  }
  .sig-holder p {
    font-weight: 600;
  }
  .nav {
    height: var(--nav-height);
    position: sticky;
    top: 0;
    width: 100%;
    background: light-dark(canvas, #000);
    z-index: 9999;
    transition: opacity 0.26s ease-out;

    .nav__content {
      width: var(--content-width);
      max-width: calc(100% - 2rem);
      margin: 0 auto;
      height: 100%;
      display: flex;
      justify-content: space-between;
      align-items: center;

      & > a {
        display: grid;
        place-items: center;
        width: 40px;
        aspect-ratio: 1;
        color: inherit;

        svg {
          width: 24px;
        }
      }
    }
  }

  .sig {
    width: 160px;
    rotate: 12deg;
  }

  html {
    scrollbar-color: canvasText #0000;
  }
  header {
    padding-block: 4rem;

    h1 {
      margin: 0;
    }

    p {
      font-size: 1.25rem;
      margin: 0;
      text-wrap: balance;
    }
  }
  hr {
    /* opacity: 0.5; */
    border-color: color-mix(in oklch, canvas, canvasText 1%);
    margin-bottom: 2rem;
    z-index: -1;
  }
  footer {
    padding: 2rem;
    margin-top: 8rem;
    opacity: 0.7;
  }
  main {
    width: var(--content-width);
    max-width: calc(100% - 2rem);
    line-height: 1.5;
    font-size: 0.875rem;
    transition: opacity 0.26s ease-out;
    margin: 0 auto;
    ul {
      margin-bottom: 2rem;
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
      margin-top: 0.25rem;
      padding-left: 0.5rem;
      list-style-position: inside;
    }

    p {
      color: color-mix(in oklch, canvasText, canvas 36%);

      &:has(+ ul) {
        margin-bottom: 0.5rem;
      }
    }
  }
  h1 {
    font-family: 'Inter', sans-serif;
    font-size: 2rem;
    font-weight: 500;
    letter-spacing: -0.05em;
  }
  nav {
    ul {
      padding: 0;
      margin: 0;
      display: flex;
      list-style-type: none;
      align-items: center;
      gap: 0.5rem;
      font-size: 0.875rem;

      a {
        text-decoration: none;
        color: inherit;
        cursor: pointer;
      }
    }
  }
}

@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 {
    background: light-dark(#fff, #000);
    color: light-dark(hsl(0 0% 10%), hsl(0 0% 98%));
    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 hsl, canvasText, transparent 90%);
    content: '';
    height: 100vh;
    width: 100vw;
    position: fixed;
    background: linear-gradient(
          90deg,
          var(--line) 1px,
          transparent 1px var(--size)
        )
        calc(var(--size) * 0.36) 50% / var(--size) var(--size),
      linear-gradient(var(--line) 1px, transparent 1px var(--size)) 0%
        calc(var(--size) * 0.32) / var(--size) var(--size);
    mask: linear-gradient(132deg, transparent 60%, 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;
  bottom: 8px;
  top: unset;
  left: 8px;
  z-index: 99999;
  width: 280px;
}