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

@layer normalize, base, demo, debug, motion, signature;

.main {
  text-align: center !important;
}

@layer signature {
  .sig {
    --base-delay: calc((var(--duration) + var(--delay)));
    --natty-delay: 0.973125;
    position: absolute;
    top: calc(100% + 1rem);
    width: 160px;
    right: 0;
    rotate: 10deg;
  }
  path {
    --end: 1.025;
    stroke-dasharray: var(--end);
    stroke-dashoffset: var(--end);
    animation: draw calc(var(--path-speed) * 1s)
      calc((var(--base-delay) * 1s) + var(--path-delay, 0) * 1s) ease-in
      forwards;
  }

  :is(.eye, .nose) {
    fill: hsl(0 0% 0% / 0);
    animation: draw calc(var(--path-speed) * 1s)
        calc((var(--base-delay) * 1s) + var(--path-delay, 0) * 1s) ease-in
        forwards,
      fill 0.5s calc((var(--base-delay) * 1s) + var(--natty-delay, 0) * 1s)
        forwards;
  }

  .eye {
    transform-box: fill-box;
    transform-origin: 50% 50%;
    animation: draw calc(var(--path-speed) * 1s)
        calc((var(--base-delay) * 1s) + var(--path-delay, 0) * 1s) ease-in
        forwards,
      fill 0.5s calc((var(--base-delay) * 1s) + var(--natty-delay, 0) * 1s)
        forwards,
      blink 6s calc((var(--base-delay) * 1s) + var(--natty-delay, 0) * 1s)
        infinite;
  }

  @keyframes fill {
    to {
      fill: currentColor;
    }
  }

  @keyframes draw {
    to {
      stroke-dashoffset: 0;
    }
  }

  @keyframes blink {
    0%,
    46%,
    48%,
    50%,
    100% {
      transform: scaleY(1);
    }
    47%,
    49% {
      transform: scaleY(0.1);
    }
  }
}

@layer motion {
  @property --progress {
    initial-value: 0;
    syntax: '<number>';
    inherits: true;
  }

  :root {
    --start-mask: -70;
    --end-mask: 0;
    --start-bg: 132;
    --end-bg: 16;
    --duration: 1.8;
    --color: hsl(280 80% 50% / 0.5);
  }

  [data-debug='false'] {
    .dupe--hide,
    .dupe--reveal {
      animation: reveal calc(var(--duration) * 1s) calc(var(--delay) * 1s) ease-in both,
        compress calc(var(--duration) * 0.5s) calc((var(--delay) * 1s) + (var(--duration) * 0.44s)) ease-in-out both;
    }
    .dupe--reveal {
      --movement: 0.15lh;
      --compression: 1.55;
      line-height: 1.46;
    }
    .dupe--reveal .dupe__content {
      /* needs to go from -80 to -20 */
      mask-image: radial-gradient(
        180cqmax 180cqmax at 50%
          calc(
            (var(--start-mask) * 1cqmax) +
              ((var(--progress) - 1) * (var(--start-mask) * -1cqmax))
          ),
        #fff 38%,
        #0000 40%
      );
      mask-composite: exclude;
    }
    .dupe--hide {
      --compression: 1.4;
      .dupe__content {
        filter: blur(calc(var(--blur, 0) * 1px));
        /* trying to go from 120 to 16 */
        background: radial-gradient(
            180cqmax 180cqmax at 50%
              calc(
                (var(--start-bg) * 1cqmax) -
                  (
                    clamp(0, var(--progress), 1) *
                      ((var(--start-bg) - var(--end-bg)) * 1cqmax)
                  )
              ),
            var(--color) 25%,
            canvasText,
            #0000
          )
          50% 50% / 100% 100% no-repeat;
        color: #0000;
        background-clip: text;
        /* needs to go from -80 to 0 */
        mask-image: radial-gradient(
            180cqmax 180cqmax at 50%
              calc(
                (var(--start-mask) * 1cqmax) +
                  ((var(--progress) - 1) * (var(--start-mask) * -1cqmax))
              ),
            #fff 43%,
            #0000 45%
          ),
          linear-gradient(#fff 0 0);
        mask-composite: exclude;
      }
    }
  }

  @keyframes reveal {
    0% {
      --progress: 0;
      animation-timing-function: ease-in;
    }
    40% {
      --progress: 1;
      animation-timing-function: ease-out;
    }
    90%,
    100% {
      --progress: 2;
    }
  }
  @keyframes compress {
    40% {
      transform: translateY(var(--movement, 0));
    }
    50% {
      line-height: var(--compression, 1.5);
    }
    75% {
      transform: translateY(0);
    }
    100% {
      line-height: 1.5;
    }
  }
}

@layer debug {
  /*
  * We have two things to do;
  * background: 112 -> 16
  * mask: -80 -> -20
  */
  [data-debug='true'] {
    .dupe--hide .dupe__content {
      filter: blur(calc(var(--blur, 0) * 1px));
      background: radial-gradient(
          100cqmax 100cqmax at 50% calc(var(--by) * 1cqmax),
          hsl(220 40% 60%),
          canvasText,
          #0000
        )
        50% 50% / 100% 100% no-repeat;
      color: #0000;
      background-clip: text;
      mask-image: radial-gradient(
          120cqmax 120cqmax at 50% calc(var(--my) * 1cqmax),
          #fff 43%,
          #0000 45%
        ),
        linear-gradient(#fff 0 0);
      mask-composite: exclude;
    }
    .dupe--reveal .dupe__content {
      mask-image: radial-gradient(
        120cqmax 120cqmax at 50% calc(var(--my) * 1cqmax),
        #fff 38%,
        #0000 40%
      );
      mask-composite: exclude;
    }
    .dupe__content {
      line-height: var(--lh, 1.5);
    }
  }
}

@layer demo {
  main {
    position: relative;
    font-family: 'Inter', sans-serif;
    font-size: 1.25rem;
    line-height: 1.5;
  }

  .dupe {
    position: absolute;
    text-align: center;
    container-type: inline-size;
    bottom: 0;
    left: 0;
    right: 0;
    min-height: 100%;
    width: 50ch;
    max-width: 100%;
    font-weight: 300;
    display: grid;
    place-items: end;

    .dupe__content {
      padding: 1rem;
    }

    a {
      color: inherit;
      font-weight: 700;
    }
  }

  .dupe--reveal {
    place-items: start;
    .dupe__content {
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
    }
  }

  .text-container {
    position: relative;
  }

  .text {
    width: 50ch;
    max-width: 100%;
    padding: 1rem;
    font-weight: 300;
    opacity: 0;
  }

  hr {
    width: calc(100% - 1rem);
    margin-block: 2rem;
    opacity: 0.2;
    display: inline-block;
    animation: fade 1s calc((var(--duration) + var(--delay)) * 1.1s) both;
  }

  .dupe,
  .text {
    color: color-mix(in hsl, currentColor, #000 30%);

    a {
      text-underline-offset: 4px;
    }

    &:not(.dupe--hide) {
      a,
      strong {
        color: canvasText;
      }
    }
  }
  body {
    background: light-dark(#fff, #000);
  }
  @keyframes fade {
    0% {
      opacity: 0;
    }
  }
}

@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 hsl, 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 {
  width: 280px;
}

.typing-text {
  font-weight: 600;
  color: canvasText;
  min-height: 1.5em;
  display: inline-block;
  text-align: center;
}

.typing-cursor {
  font-weight: 400;
  color: canvasText;
  animation: blink-cursor 0.8s step-end infinite;
  margin-left: 0;
}

@keyframes blink-cursor {
  0%,
  50% {
    opacity: 1;
  }
  51%,
  100% {
    opacity: 0;
  }
}

/* ============================================
   RESPONSIVE DESIGN - MOBILE OPTIMIZATIONS
   ============================================ */

/* Tablet and smaller desktop (768px and below) */
@media (max-width: 768px) {
  main {
    font-size: 1.1rem;
    padding: 0 0.5rem;
  }

  .text,
  .dupe {
    width: 100%;
    max-width: 100%;
    padding: 0.75rem;
  }

  .dupe__content {
    padding: 0.75rem;
  }

  .sig {
    width: 120px;
    top: calc(100% + 0.5rem);
  }

  hr {
    margin-block: 1.5rem;
  }

  .bear-link {
    width: 40px;
  }
}

/* Mobile landscape and small tablets (640px and below) */
@media (max-width: 640px) {
  main {
    font-size: 1rem;
    padding: 0 0.25rem;
  }

  .text,
  .dupe {
    padding: 0.5rem;
  }

  .dupe__content {
    padding: 0.5rem;
  }

  .sig {
    width: 100px;
    right: 0.25rem;
  }

  hr {
    width: calc(100% - 0.5rem);
    margin-block: 1rem;
  }

  .bear-link {
    width: 36px;
    top: 0.75rem;
    left: 0.75rem;
  }

  body::before {
    --size: 35px;
  }
}

/* Mobile portrait (480px and below) */
@media (max-width: 480px) {
  :root {
    --font-size-min: 14;
    --font-width-min: 320;
  }

  main {
    font-size: 0.95rem;
    line-height: 1.6;
  }

  .text,
  .dupe {
    padding: 0.5rem;
    width: 100%;
  }

  .dupe__content {
    padding: 0.5rem;
  }

  h1 {
    font-size: 1.5rem;
    line-height: 1.3;
  }

  .sig {
    width: 80px;
    top: calc(100% + 0.25rem);
    right: 0;
  }

  hr {
    margin-block: 0.75rem;
  }

  .bear-link {
    width: 32px;
    top: 0.5rem;
    left: 0.5rem;
  }

  body::before {
    --size: 25px;
  }

  .typing-text {
    font-size: 0.9rem;
    min-height: 2em;
    word-wrap: break-word;
    max-width: 100%;
  }

  /* Adjust animation speeds for mobile */
  :root {
    --duration: 1.6;
  }
}

/* Extra small mobile devices (375px and below) */
@media (max-width: 375px) {
  main {
    font-size: 0.875rem;
  }

  h1 {
    font-size: 1.25rem;
  }

  .sig {
    width: 70px;
  }

  .bear-link {
    width: 28px;
  }

  body::before {
    --size: 20px;
  }

  .typing-text {
    font-size: 0.85rem;
  }
}

/* Very small devices (320px and below) */
@media (max-width: 320px) {
  main {
    font-size: 0.8rem;
  }

  h1 {
    font-size: 1.1rem;
  }

  .text,
  .dupe {
    padding: 0.375rem;
  }

  .dupe__content {
    padding: 0.375rem;
  }

  .sig {
    width: 60px;
  }

  .typing-text {
    font-size: 0.8rem;
  }
}

/* Landscape orientation optimization for mobile */
@media (max-height: 500px) and (orientation: landscape) {
  main {
    font-size: 0.9rem;
  }

  .sig {
    width: 70px;
    top: calc(100% + 0.25rem);
  }

  hr {
    margin-block: 0.5rem;
  }

  body {
    min-height: 100vh;
  }
}

/* Ensure touch targets are accessible (44px minimum) */
@media (pointer: coarse) {
  .bear-link {
    min-width: 44px;
    min-height: 44px;
    padding: 0.5rem;
  }

  a {
    padding: 0.25rem 0;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
}

/* High DPI / Retina display optimization */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .sig path {
    stroke-width: 3;
  }
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}