/* ==========================================================================
   interactions.css — hover i pointer mikro-interakcije, bez ovisnosti
   Pair s interactions.js (samo za efekte koji traže mjerenje ili stanje).

   Tehnike i konstante preuzete iz Kokonut UI (MIT) i portane na vanilla —
   vidi references/kokonut-ui.md.
   ========================================================================== */

:root {
  --ix-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ix-fast: 180ms;
  --ix-base: 300ms;
  --ix-slow: 700ms;
  --ix-accent: currentColor;
}

/* --- 1. shimmer sweep ----------------------------------------------------
   Nakošena traka svjetla prelazi preko elementa na hover. Bez JS-a.
   Element mora imati position: relative i overflow: hidden.
   ------------------------------------------------------------------------ */
[data-ix~="shimmer"] {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
[data-ix~="shimmer"]::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 55%;
  transform: translateX(-100%) skewX(-12deg);
  background: linear-gradient(
    to right,
    transparent,
    var(--ix-shimmer, rgba(255, 255, 255, 0.28)),
    transparent
  );
  transition: transform var(--ix-slow) ease-out;
  pointer-events: none;
  z-index: 1;
}
[data-ix~="shimmer"]:hover::after,
[data-ix~="shimmer"]:focus-visible::after {
  transform: translateX(280%) skewX(-12deg);
}

/* --- 2. accent linija po dnu ---------------------------------------------
   Raste s lijeva na hover. Jeftina, a čini karticu namjernom.
   ------------------------------------------------------------------------ */
[data-ix~="accent-line"] { position: relative; }
[data-ix~="accent-line"]::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0;
  border-radius: 2px;
  background: linear-gradient(to right, var(--ix-accent), transparent);
  transition: width 500ms var(--ix-ease);
  pointer-events: none;
}
[data-ix~="accent-line"]:hover::before { width: 100%; }

/* --- 3. slide-text gumb ---------------------------------------------------
   Tekst klizne gore, kopija dolazi odozdo. Markup:
   <a data-ix="slide-text"><span data-ix-text="Kontakt">Kontakt</span></a>
   ------------------------------------------------------------------------ */
[data-ix~="slide-text"] { overflow: hidden; display: inline-flex; }
[data-ix~="slide-text"] [data-ix-text] {
  position: relative;
  display: inline-block;
  transition: transform 420ms var(--ix-ease);
}
[data-ix~="slide-text"] [data-ix-text]::after {
  content: attr(data-ix-text);
  position: absolute;
  left: 0;
  top: 100%;
  width: 100%;
}
[data-ix~="slide-text"]:hover [data-ix-text],
[data-ix~="slide-text"]:focus-visible [data-ix-text] {
  transform: translateY(-100%);
}

/* --- 4. flip kartica ------------------------------------------------------
   <div data-ix="flip"><div data-ix-front>…</div><div data-ix-back>…</div></div>
   ------------------------------------------------------------------------ */
[data-ix~="flip"] {
  position: relative;
  perspective: 1200px;
}
[data-ix~="flip"] > [data-ix-front],
[data-ix~="flip"] > [data-ix-back] {
  backface-visibility: hidden;
  transition: transform 600ms var(--ix-ease);
  transform-style: preserve-3d;
}
[data-ix~="flip"] > [data-ix-back] {
  position: absolute;
  inset: 0;
  transform: rotateY(180deg);
}
[data-ix~="flip"]:hover > [data-ix-front],
[data-ix~="flip"]:focus-within > [data-ix-front] { transform: rotateY(-180deg); }
[data-ix~="flip"]:hover > [data-ix-back],
[data-ix~="flip"]:focus-within > [data-ix-back] { transform: rotateY(0deg); }

/* --- 5. tilt + glow (JS postavlja varijable) ------------------------------
   --ix-rx / --ix-ry rotacija, --ix-mx / --ix-my pozicija pokazivača u %.
   ------------------------------------------------------------------------ */
[data-ix~="tilt"] {
  position: relative;
  transform: perspective(900px) rotateX(var(--ix-rx, 0deg)) rotateY(var(--ix-ry, 0deg));
  transition: transform 220ms var(--ix-ease), opacity var(--ix-fast) ease-out;
  will-change: transform;
}
[data-ix~="tilt"][data-ix-active] { transition: transform 80ms linear; }

[data-ix~="glow"] { position: relative; isolation: isolate; }
[data-ix~="glow"]::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(
    ellipse at var(--ix-mx, 50%) var(--ix-my, 50%),
    var(--ix-glow, rgba(255, 255, 255, 0.18)),
    transparent 65%
  );
  opacity: 0;
  transition: opacity var(--ix-base) ease-out;
  pointer-events: none;
  z-index: 0;
}
[data-ix~="glow"]:hover::before { opacity: 1; }

/* --- 6. focus dimming ----------------------------------------------------
   Kad je jedna kartica u fokusu, ostale se povuku. JS označava .ix-dim.
   ------------------------------------------------------------------------ */
.ix-dim {
  opacity: 0.5;
  transform: scale(0.96);
  transition: opacity var(--ix-fast) ease-out, transform var(--ix-fast) ease-out;
}

/* --- 7. hold-to-confirm --------------------------------------------------- */
[data-ix~="hold"] {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  user-select: none;
}
[data-ix~="hold"]::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 100%;
  transform: scaleX(var(--ix-hold, 0));
  transform-origin: 0 50%;
  background: var(--ix-hold-fill, rgba(0, 0, 0, 0.12));
  transition: transform 80ms linear;
  pointer-events: none;
  z-index: -1;
}

/* --- 8. scroll-text ------------------------------------------------------
   Lista riječi/redaka gdje aktivni dobiva punu boju dok skrolaš.
   ------------------------------------------------------------------------ */
[data-ix~="scroll-text"] > * {
  color: var(--ix-muted, rgba(0, 0, 0, 0.25));
  transition: color 400ms var(--ix-ease), opacity 400ms var(--ix-ease);
}
[data-ix~="scroll-text"] > .ix-active { color: inherit; }

/* --- 9. press ------------------------------------------------------------
   Jedva vidljiv otpor na klik. Stavi na svaki gumb.
   ------------------------------------------------------------------------ */
[data-ix~="press"] { transition: transform 120ms var(--ix-ease); }
[data-ix~="press"]:active { transform: scale(0.97); }

/* --- reduced motion ------------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
  [data-ix]::after,
  [data-ix]::before,
  [data-ix],
  [data-ix] * {
    transition: none !important;
    animation: none !important;
  }
  [data-ix~="tilt"] { transform: none !important; }
  .ix-dim { opacity: 1; transform: none; }
}

/* Na dodirnim ekranima hover efekti nemaju smisla — ugasi ih da ne ostanu
   zaglavljeni u hover stanju nakon tapa. */
@media (hover: none) {
  [data-ix~="shimmer"]::after { display: none; }
  [data-ix~="tilt"] { transform: none !important; }
  [data-ix~="glow"]::before { display: none; }
}