/*
 * Custom Tailwind v4 utilities migrated from packages/config/ui.config.js
 * (addUtilities + matchUtilities) and packages/config/tailwind.config.js
 * (the .bg legacy shim).
 */

/*
 * The `bg` class worked in Tailwind v3 but stopped working in v4. Restored as
 * an alias for `bg-default` to avoid a wide rename across the codebase.
 * Should be deprecated in favor of `bg-default`.
 */
@utility bg {
  background-color: var(--background);
}

/*
 * Soft shimmer gradient used by LoadingLine.
 */
@utility line-loading-bg {
  background: rgb(0, 0, 0);
  background: linear-gradient(
    90deg,
    rgba(0, 0, 0, 0) 0%,
    rgba(255, 255, 255, 0.65) 50%,
    rgba(0, 0, 0, 0) 100%
  );
}
@utility line-loading-bg-light {
  background: rgb(0, 0, 0);
  background: linear-gradient(
    90deg,
    rgba(0, 0, 0, 0) 0%,
    rgba(33, 33, 33, 0.65) 50%,
    rgba(0, 0, 0, 0) 100%
  );
}

/* may be unused — verify before pruning */
@utility mask-fadeout-right {
  -webkit-mask-image: linear-gradient(to right, white 98%, transparent 100%);
  mask-image: linear-gradient(to right, white 98%, transparent 100%);
}
/* may be unused — verify before pruning */
@utility mask-fadeout-left {
  -webkit-mask-image: linear-gradient(to left, white 98%, transparent 100%);
  mask-image: linear-gradient(to left, white 98%, transparent 100%);
}

/*
 * Functional color utilities. The `--value(--color-*)` token accepts any
 * registered --color-* design token (e.g. highlight-foreground-light).
 */
/* may be unused — verify before pruning */
@utility highlight-* {
  box-shadow: inset 0 1px 0 0 --value(--color-*);
}
/* may be unused — verify before pruning */
@utility subhighlight-* {
  box-shadow: inset 0 -1px 0 0 --value(--color-*);
}

/*
 * Inline-SVG grid background. Used by ProjectLinker as bg-grid-black/5 and
 * bg-grid-white/5 for the integrations onboarding visuals.
 */
@utility bg-grid-* {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32' width='32' height='32' fill='none' stroke='--value(--color-*)'><path d='M0 .5H31.5V32'/></svg>");
}

@utility no-scrollbar {
  -ms-overflow-style: none; /* IE and Edge */
  scrollbar-width: none; /* Firefox */
  &::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Opera */
  }
}

/*
 * Text shimmer (shadcn shimmer utility, inlined so we don't pull in the full
 * shadcn CSS package). Apply `shimmer` to text to draw attention.
 */
@property --shimmer-angle {
  syntax: '<angle>';
  inherits: true;
  initial-value: 20deg;
}
@property --shimmer-image {
  syntax: '*';
  inherits: false;
}
@property --shimmer-text-fill {
  syntax: '*';
  inherits: false;
}

@utility shimmer {
  --_spread: var(--shimmer-spread, calc(3ch + 40px));
  --_base: currentColor;
  --_highlight: var(--shimmer-color, oklch(from currentColor l c h / calc(alpha* 0.2)));

  background-image: var(
    --shimmer-image,
    linear-gradient(
      calc(90deg + var(--shimmer-angle)),
      var(--_base) calc(50% - var(--_spread)),
      color-mix(in oklch, var(--_highlight), var(--_base) 50%) calc(50% - var(--_spread) * 0.5),
      var(--_highlight) 50%,
      color-mix(in oklch, var(--_highlight), var(--_base) 50%) calc(50% + var(--_spread) * 0.5),
      var(--_base) calc(50% + var(--_spread))
    )
  );
  background-repeat: no-repeat;
  background-size: calc(200% + var(--_spread) * 2) 100%;
  background-position: 0 0;
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: var(--shimmer-text-fill, transparent);
  animation: tw-shimmer var(--shimmer-duration, 2s) linear infinite;
  transition: -webkit-text-fill-color 0.5s ease;

  /* Fade to solid text on dismiss — keep the gradient until fill is opaque */
  &[data-shimmer-fading] {
    -webkit-text-fill-color: currentColor;
    animation-play-state: paused;
  }

  @variant dark {
    --_highlight: var(
      --shimmer-color,
      oklch(from currentColor max(0.8, calc(l + 0.4)) c h / calc(alpha + 0.4))
    );
  }

  &:where([dir='rtl'], [dir='rtl'] *) {
    animation-direction: reverse;
  }
}

@utility shimmer-once {
  animation-iteration-count: 1;
}

@utility shimmer-reverse {
  animation-direction: reverse;
}

@utility shimmer-none {
  --shimmer-image: none;
  --shimmer-text-fill: currentColor;
  background-image: none;
  -webkit-text-fill-color: currentColor;
}

@utility shimmer-color-* {
  --shimmer-color: --value(--color-*, [color]);
  --shimmer-color: color-mix(
    in oklch,
    --value(--color-*, [color]) calc(--modifier(integer) * 1%),
    transparent
  );
}

@utility shimmer-duration-* {
  --shimmer-duration: calc(--value(integer) * 1ms);
}

@utility shimmer-spread-* {
  --shimmer-spread: calc(var(--spacing) * --value(integer));
  --shimmer-spread: --value([length], [percentage]);
}

@utility shimmer-angle-* {
  --shimmer-angle: calc(--value(integer) * 1deg);
}

@media (prefers-reduced-motion: reduce) {
  .shimmer {
    animation: none;
    background-image: none;
    -webkit-text-fill-color: currentColor;
  }
}

/*
 * Canonical keyboard focus rings. Prefer these over inventing local ring/outline
 * stacks.
 *
 * - focus-ring: default offset ring (buttons, inputs, most controls).
 *   `outline-hidden` stays always-on so mouse click does not show the browser
 *   default; the ring is `:focus-visible` only.
 * - focus-inset: dense/flush surfaces such as interactive <tr>s. Must use
 *   outline (not ring/box-shadow) — box-shadow on table-row is unreliable,
 *   especially in Safari. Do NOT pair with outline-hidden: that sets
 *   outline-style: none and suppresses the focus outline.
 */
@utility focus-ring {
  @apply outline-hidden focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 focus-visible:ring-offset-background;
}

@utility focus-inset {
  &:focus-visible {
    outline-style: solid;
    outline-width: 2px;
    outline-offset: -2px;
    outline-color: var(--ring);
    border-radius: var(--radius-md, 0.375rem);
  }
}