/**
 * Tailwind v4 utilities for DGA apps.
 *
 * Includes scroll-fade (shadcn-style edge masks) + no-scrollbar.
 * @see https://ui.shadcn.com/docs/utils/scroll-fade
 *
 * Defaults use DGA spacing tokens:
 *   fade depth  → min(12%, --dga-spacing-5xl) ≈ 40px cap
 *   reveal range → --dga-spacing-9xl = 96px
 */

@utility no-scrollbar {
  -ms-overflow-style: none;
  scrollbar-width: none;

  &::-webkit-scrollbar {
    display: none;
  }
}

/* scroll-fade */
@property --scroll-fade-t {
  syntax: '<length-percentage>';
  inherits: false;
  initial-value: 0px;
}
@property --scroll-fade-b {
  syntax: '<length-percentage>';
  inherits: false;
  initial-value: 0px;
}
@property --scroll-fade-s {
  syntax: '<length-percentage>';
  inherits: false;
  initial-value: 0px;
}
@property --scroll-fade-e {
  syntax: '<length-percentage>';
  inherits: false;
  initial-value: 0px;
}
@property --scroll-fade-mask {
  syntax: '*';
  inherits: false;
}

@theme inline {
  @keyframes scroll-fade-reveal-t {
    from {
      --scroll-fade-t: 0px;
    }
    to {
      --scroll-fade-t: var(
        --_scroll-fade-size-t,
        var(--scroll-fade-size, min(12%, var(--dga-spacing-5xl, 40px)))
      );
    }
  }
  @keyframes scroll-fade-reveal-b {
    from {
      --scroll-fade-b: var(
        --_scroll-fade-size-b,
        var(--scroll-fade-size, min(12%, var(--dga-spacing-5xl, 40px)))
      );
    }
    to {
      --scroll-fade-b: 0px;
    }
  }
  @keyframes scroll-fade-reveal-s {
    from {
      --scroll-fade-s: 0px;
    }
    to {
      --scroll-fade-s: var(
        --_scroll-fade-size-s,
        var(--scroll-fade-size, min(12%, var(--dga-spacing-5xl, 40px)))
      );
    }
  }
  @keyframes scroll-fade-reveal-e {
    from {
      --scroll-fade-e: var(
        --_scroll-fade-size-e,
        var(--scroll-fade-size, min(12%, var(--dga-spacing-5xl, 40px)))
      );
    }
    to {
      --scroll-fade-e: 0px;
    }
  }
}

@utility scroll-fade {
  --_scroll-fade-size-t: var(
    --scroll-fade-t-size,
    var(--scroll-fade-size, min(12%, var(--dga-spacing-5xl, 40px)))
  );
  --_scroll-fade-size-b: var(
    --scroll-fade-b-size,
    var(--scroll-fade-size, min(12%, var(--dga-spacing-5xl, 40px)))
  );
  --scroll-fade-block: linear-gradient(
    to bottom,
    transparent 0,
    #000 var(--scroll-fade-t, 0px),
    #000 calc(100% - var(--scroll-fade-b, 0px)),
    transparent 100%
  );
  -webkit-mask-image: var(--scroll-fade-mask, var(--scroll-fade-block));
  mask-image: var(--scroll-fade-mask, var(--scroll-fade-block));
  -webkit-mask-composite: source-in;
  mask-composite: intersect;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;

  @supports (animation-timeline: scroll()) {
    animation:
      scroll-fade-reveal-t 1ms ease-in-out,
      scroll-fade-reveal-b 1ms ease-in-out;
    animation-timeline: scroll(self y), scroll(self y);
    animation-range:
      0 var(--scroll-fade-reveal, var(--dga-spacing-9xl, 96px)),
      calc(100% - var(--scroll-fade-reveal, var(--dga-spacing-9xl, 96px))) 100%;
    animation-fill-mode: both;
  }

  @supports not (animation-timeline: scroll()) {
    --scroll-fade-t: var(--_scroll-fade-size-t);
    --scroll-fade-b: var(--_scroll-fade-size-b);
  }
}

@utility scroll-fade-y {
  --_scroll-fade-size-t: var(
    --scroll-fade-t-size,
    var(--scroll-fade-size, min(12%, var(--dga-spacing-5xl, 40px)))
  );
  --_scroll-fade-size-b: var(
    --scroll-fade-b-size,
    var(--scroll-fade-size, min(12%, var(--dga-spacing-5xl, 40px)))
  );
  --scroll-fade-block: linear-gradient(
    to bottom,
    transparent 0,
    #000 var(--scroll-fade-t, 0px),
    #000 calc(100% - var(--scroll-fade-b, 0px)),
    transparent 100%
  );
  -webkit-mask-image: var(--scroll-fade-mask, var(--scroll-fade-block));
  mask-image: var(--scroll-fade-mask, var(--scroll-fade-block));
  -webkit-mask-composite: source-in;
  mask-composite: intersect;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;

  @supports (animation-timeline: scroll()) {
    animation:
      scroll-fade-reveal-t 1ms ease-in-out,
      scroll-fade-reveal-b 1ms ease-in-out;
    animation-timeline: scroll(self y), scroll(self y);
    animation-range:
      0 var(--scroll-fade-reveal, var(--dga-spacing-9xl, 96px)),
      calc(100% - var(--scroll-fade-reveal, var(--dga-spacing-9xl, 96px))) 100%;
    animation-fill-mode: both;
  }

  @supports not (animation-timeline: scroll()) {
    --scroll-fade-t: var(--_scroll-fade-size-t);
    --scroll-fade-b: var(--_scroll-fade-size-b);
  }
}

@utility scroll-fade-x {
  --_scroll-fade-size-s: var(
    --scroll-fade-s-size,
    var(--scroll-fade-size, min(12%, var(--dga-spacing-5xl, 40px)))
  );
  --_scroll-fade-size-e: var(
    --scroll-fade-e-size,
    var(--scroll-fade-size, min(12%, var(--dga-spacing-5xl, 40px)))
  );
  --scroll-fade-inline: linear-gradient(
    to right,
    transparent 0,
    #000 var(--scroll-fade-s, 0px),
    #000 calc(100% - var(--scroll-fade-e, 0px)),
    transparent 100%
  );
  &:where([dir='rtl'], [dir='rtl'] *) {
    --scroll-fade-inline: linear-gradient(
      to left,
      transparent 0,
      #000 var(--scroll-fade-s, 0px),
      #000 calc(100% - var(--scroll-fade-e, 0px)),
      transparent 100%
    );
  }
  -webkit-mask-image: var(--scroll-fade-mask, var(--scroll-fade-inline));
  mask-image: var(--scroll-fade-mask, var(--scroll-fade-inline));
  -webkit-mask-composite: source-in;
  mask-composite: intersect;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;

  @supports (animation-timeline: scroll()) {
    animation:
      scroll-fade-reveal-s 1ms ease-in-out,
      scroll-fade-reveal-e 1ms ease-in-out;
    animation-timeline: scroll(self inline), scroll(self inline);
    animation-range:
      0 var(--scroll-fade-reveal, var(--dga-spacing-9xl, 96px)),
      calc(100% - var(--scroll-fade-reveal, var(--dga-spacing-9xl, 96px))) 100%;
    animation-fill-mode: both;
  }

  @supports not (animation-timeline: scroll()) {
    --scroll-fade-s: var(--_scroll-fade-size-s);
    --scroll-fade-e: var(--_scroll-fade-size-e);
  }
}

@utility scroll-fade-t {
  --_scroll-fade-size-t: var(
    --scroll-fade-t-size,
    var(--scroll-fade-size, min(12%, var(--dga-spacing-5xl, 40px)))
  );
  --scroll-fade-mask: linear-gradient(
    to bottom,
    transparent 0,
    #000 var(--scroll-fade-t, 0px),
    #000 100%
  );
  -webkit-mask-image: var(--scroll-fade-mask);
  mask-image: var(--scroll-fade-mask);
  -webkit-mask-composite: source-in;
  mask-composite: intersect;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;

  @supports (animation-timeline: scroll()) {
    animation: scroll-fade-reveal-t 1ms ease-in-out;
    animation-timeline: scroll(self y);
    animation-range: 0 var(--scroll-fade-reveal, var(--dga-spacing-9xl, 96px));
    animation-fill-mode: both;
  }

  @supports not (animation-timeline: scroll()) {
    --scroll-fade-t: var(--_scroll-fade-size-t);
  }
}

@utility scroll-fade-b {
  --_scroll-fade-size-b: var(
    --scroll-fade-b-size,
    var(--scroll-fade-size, min(12%, var(--dga-spacing-5xl, 40px)))
  );
  --scroll-fade-mask: linear-gradient(
    to bottom,
    #000 0,
    #000 calc(100% - var(--scroll-fade-b, 0px)),
    transparent 100%
  );
  -webkit-mask-image: var(--scroll-fade-mask);
  mask-image: var(--scroll-fade-mask);
  -webkit-mask-composite: source-in;
  mask-composite: intersect;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;

  @supports (animation-timeline: scroll()) {
    animation: scroll-fade-reveal-b 1ms ease-in-out;
    animation-timeline: scroll(self y);
    animation-range:
      calc(100% - var(--scroll-fade-reveal, var(--dga-spacing-9xl, 96px))) 100%;
    animation-fill-mode: both;
  }

  @supports not (animation-timeline: scroll()) {
    --scroll-fade-b: var(--_scroll-fade-size-b);
  }
}

@utility scroll-fade-l {
  --_scroll-fade-size-s: var(
    --scroll-fade-s-size,
    var(--scroll-fade-size, min(12%, var(--dga-spacing-5xl, 40px)))
  );
  --scroll-fade-mask: linear-gradient(
    to right,
    transparent 0,
    #000 var(--scroll-fade-s, 0px),
    #000 100%
  );
  -webkit-mask-image: var(--scroll-fade-mask);
  mask-image: var(--scroll-fade-mask);
  -webkit-mask-composite: source-in;
  mask-composite: intersect;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;

  @supports (animation-timeline: scroll()) {
    animation: scroll-fade-reveal-s 1ms ease-in-out;
    animation-timeline: scroll(self x);
    animation-range: 0 var(--scroll-fade-reveal, var(--dga-spacing-9xl, 96px));
    animation-fill-mode: both;
  }

  @supports not (animation-timeline: scroll()) {
    --scroll-fade-s: var(--_scroll-fade-size-s);
  }
}

@utility scroll-fade-r {
  --_scroll-fade-size-e: var(
    --scroll-fade-e-size,
    var(--scroll-fade-size, min(12%, var(--dga-spacing-5xl, 40px)))
  );
  --scroll-fade-mask: linear-gradient(
    to right,
    #000 0,
    #000 calc(100% - var(--scroll-fade-e, 0px)),
    transparent 100%
  );
  -webkit-mask-image: var(--scroll-fade-mask);
  mask-image: var(--scroll-fade-mask);
  -webkit-mask-composite: source-in;
  mask-composite: intersect;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;

  @supports (animation-timeline: scroll()) {
    animation: scroll-fade-reveal-e 1ms ease-in-out;
    animation-timeline: scroll(self x);
    animation-range:
      calc(100% - var(--scroll-fade-reveal, var(--dga-spacing-9xl, 96px))) 100%;
    animation-fill-mode: both;
  }

  @supports not (animation-timeline: scroll()) {
    --scroll-fade-e: var(--_scroll-fade-size-e);
  }
}

@utility scroll-fade-s {
  --_scroll-fade-size-s: var(
    --scroll-fade-s-size,
    var(--scroll-fade-size, min(12%, var(--dga-spacing-5xl, 40px)))
  );
  --scroll-fade-mask: linear-gradient(
    to right,
    transparent 0,
    #000 var(--scroll-fade-s, 0px),
    #000 100%
  );
  &:where([dir='rtl'], [dir='rtl'] *) {
    --scroll-fade-mask: linear-gradient(
      to left,
      transparent 0,
      #000 var(--scroll-fade-s, 0px),
      #000 100%
    );
  }
  -webkit-mask-image: var(--scroll-fade-mask);
  mask-image: var(--scroll-fade-mask);
  -webkit-mask-composite: source-in;
  mask-composite: intersect;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;

  @supports (animation-timeline: scroll()) {
    animation: scroll-fade-reveal-s 1ms ease-in-out;
    animation-timeline: scroll(self inline);
    animation-range: 0 var(--scroll-fade-reveal, var(--dga-spacing-9xl, 96px));
    animation-fill-mode: both;
  }

  @supports not (animation-timeline: scroll()) {
    --scroll-fade-s: var(--_scroll-fade-size-s);
  }
}

@utility scroll-fade-e {
  --_scroll-fade-size-e: var(
    --scroll-fade-e-size,
    var(--scroll-fade-size, min(12%, var(--dga-spacing-5xl, 40px)))
  );
  --scroll-fade-mask: linear-gradient(
    to right,
    #000 0,
    #000 calc(100% - var(--scroll-fade-e, 0px)),
    transparent 100%
  );
  &:where([dir='rtl'], [dir='rtl'] *) {
    --scroll-fade-mask: linear-gradient(
      to left,
      #000 0,
      #000 calc(100% - var(--scroll-fade-e, 0px)),
      transparent 100%
    );
  }
  -webkit-mask-image: var(--scroll-fade-mask);
  mask-image: var(--scroll-fade-mask);
  -webkit-mask-composite: source-in;
  mask-composite: intersect;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;

  @supports (animation-timeline: scroll()) {
    animation: scroll-fade-reveal-e 1ms ease-in-out;
    animation-timeline: scroll(self inline);
    animation-range:
      calc(100% - var(--scroll-fade-reveal, var(--dga-spacing-9xl, 96px))) 100%;
    animation-fill-mode: both;
  }

  @supports not (animation-timeline: scroll()) {
    --scroll-fade-e: var(--_scroll-fade-size-e);
  }
}

/* Size modifiers — integers use TW --spacing (0.25rem); also accept arbitrary lengths. */
@utility scroll-fade-* {
  --scroll-fade-size: calc(var(--spacing, 0.25rem) * --value(integer));
  --scroll-fade-size: --value([length], [percentage]);
}

@utility scroll-fade-t-* {
  --scroll-fade-t-size: calc(var(--spacing, 0.25rem) * --value(integer));
  --scroll-fade-t-size: --value([length], [percentage]);
}

@utility scroll-fade-b-* {
  --scroll-fade-b-size: calc(var(--spacing, 0.25rem) * --value(integer));
  --scroll-fade-b-size: --value([length], [percentage]);
}

@utility scroll-fade-s-* {
  --scroll-fade-s-size: calc(var(--spacing, 0.25rem) * --value(integer));
  --scroll-fade-s-size: --value([length], [percentage]);
}

@utility scroll-fade-e-* {
  --scroll-fade-e-size: calc(var(--spacing, 0.25rem) * --value(integer));
  --scroll-fade-e-size: --value([length], [percentage]);
}

@utility scroll-fade-none {
  --scroll-fade-mask: none;
}