/* ============================================================
   DA ELEMENTS — Animated Links
   Vanilla-CSS port of Skiper UI "skiper40" (5 hover variants).
   Inspired by cursor.com; rebuilt in plain CSS, themed to the
   DA Elements tokens (no React / Tailwind dependency).

   Original concept: Skiper UI (@gurvinder-singh02) — https://skiper-ui.com
   Attribution to Skiper UI is required for the free version.

   Usage: add class `alink` + one variant `alink--1 … alink--5`
   to an <a>. Size is em-based, so it scales with font-size.
   ============================================================ */

.alink {
  --alink-ease: cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  display: inline-flex;
  align-items: center;
  color: inherit;
  text-decoration: none;
  font-family: var(--sans, system-ui, sans-serif);
  -webkit-tap-highlight-color: transparent;
}

/* arrow icon — hidden until hover */
.alink__arrow {
  margin-left: 0.3em;
  width: 0.55em;
  height: 0.55em;
  flex: none;
  opacity: 0;
  transform: translateY(0.25em);
  transition: transform 0.3s var(--alink-ease), opacity 0.3s var(--alink-ease);
}
.alink:hover .alink__arrow,
.alink:focus-visible .alink__arrow {
  opacity: 1;
  transform: translateY(0);
}

/* shared sweeping underline (variants 1–3) */
.alink--1::before,
.alink--2::before,
.alink--3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.5em;
  width: 100%;
  height: 0.05em;
  background: currentColor;
  pointer-events: none;
  transform: scaleX(0);
  transition: transform 0.3s var(--alink-ease);
}

/* 1 — underline sweeps IN from the left */
.alink--1::before { transform-origin: right; }
.alink--1:hover::before,
.alink--1:focus-visible::before { transform-origin: left; transform: scaleX(1); }

/* 2 — underline grows OUT toward the right */
.alink--2::before { transform-origin: left; }
.alink--2:hover::before,
.alink--2:focus-visible::before { transform-origin: right; transform: scaleX(1); }

/* 3 — underline expands from the CENTER */
.alink--3::before { transform-origin: center; }
.alink--3:hover::before,
.alink--3:focus-visible::before { transform: scaleX(1); }

/* 4 — highlight bar rises from the bottom (invert via blend) */
.alink--4 {
  padding-inline: 0.4em;
}
.alink--4::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 0;
  background: #fff;
  mix-blend-mode: difference;
  pointer-events: none;
  z-index: 1;
  transition: height 0.3s var(--alink-ease);
}
.alink--4:hover::before,
.alink--4:focus-visible::before { height: 1.4em; }
.alink--4 .alink__arrow {
  margin-left: 0.6em;
  z-index: 0;
  transform: translateY(0.25em);
}
.alink--4:hover .alink__arrow,
.alink--4:focus-visible .alink__arrow { transform: translateY(0) rotate(45deg); }

/* 5 — highlight bar sweeps across horizontally (invert via blend) */
.alink--5 {
  padding-inline: 0.4em;
}
.alink--5::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: #fff;
  mix-blend-mode: difference;
  pointer-events: none;
  z-index: 1;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--alink-ease);
}
.alink--5:hover::before,
.alink--5:focus-visible::before { transform: scaleX(1); }
.alink--5 .alink__arrow {
  margin-left: 0.6em;
  z-index: 0;
  transform: translateX(-0.25em) rotate(45deg);
}
.alink--5:hover .alink__arrow,
.alink--5:focus-visible .alink__arrow { transform: translateX(0) rotate(45deg); }

/* keep label above blend bars in variants 4 & 5 */
.alink--4 > span,
.alink--5 > span { position: relative; z-index: 2; }

@media (prefers-reduced-motion: reduce) {
  .alink::before,
  .alink__arrow { transition: none; }
}