/* =========================================================
   ALKIMIA — Scroll Animations & Transitions
   ========================================================= */

/* ---- Base reveal states ---- */
[data-reveal] {
  opacity: 0;
  transition-timing-function: var(--ease-out);
  transition-property: opacity, transform;
  transition-duration: var(--dur-slower);
}

[data-reveal="up"] {
  transform: translateY(40px);
}

[data-reveal="down"] {
  transform: translateY(-30px);
}

[data-reveal="left"] {
  transform: translateX(40px);
}

[data-reveal="right"] {
  transform: translateX(-40px);
}

[data-reveal="scale"] {
  transform: scale(0.92);
}

[data-reveal="fade"] {
  /* opacity only */
}

[data-reveal].revealed {
  opacity: 1;
  transform: none;
}

/* ---- Stagger delays ---- */
[data-delay="100"] { transition-delay: 100ms; }
[data-delay="150"] { transition-delay: 150ms; }
[data-delay="200"] { transition-delay: 200ms; }
[data-delay="300"] { transition-delay: 300ms; }
[data-delay="400"] { transition-delay: 400ms; }
[data-delay="500"] { transition-delay: 500ms; }
[data-delay="600"] { transition-delay: 600ms; }
[data-delay="700"] { transition-delay: 700ms; }
[data-delay="800"] { transition-delay: 800ms; }

/* ---- Line reveal ---- */
.line-reveal {
  overflow: hidden;
  display: block;
}

.line-reveal__inner {
  display: block;
  transform: translateY(100%);
  transition: transform 0.9s var(--ease-out);
}

.line-reveal.revealed .line-reveal__inner {
  transform: translateY(0);
}

/* ---- Split char animation ---- */
.char {
  display: inline-block;
  opacity: 0;
  transform: translateY(0.6em) rotate(3deg);
  transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out);
}

.char.revealed {
  opacity: 1;
  transform: none;
}

/* ---- Counter number ---- */
.counter-num {
  display: inline-block;
  transition: none;
}

/* ---- Image parallax wrapper ---- */
.parallax-img {
  overflow: hidden;
}

.parallax-img img {
  will-change: transform;
  transform: scale(1.12);
}

/* ---- Gold shimmer ---- */
.shimmer {
  background: linear-gradient(
    90deg,
    var(--c-gold) 0%,
    var(--c-gold-pale) 40%,
    var(--c-gold) 60%,
    var(--c-gold-light) 100%
  );
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 4s ease-in-out infinite;
}

@keyframes shimmer {
  0%   { background-position: 200% center; }
  100% { background-position: -200% center; }
}

/* ---- Horizontal scroll progress ---- */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background: var(--c-gold);
  transform-origin: left;
  transform: scaleX(0);
  z-index: var(--z-top);
  transition: transform 0.1s linear;
}

/* ---- Page transition overlay ---- */
.page-transition {
  position: fixed;
  inset: 0;
  background: var(--c-bg);
  z-index: calc(var(--z-top) + 10);
  pointer-events: none;
  transform: translateY(100%);
  transition: transform 0.5s var(--ease-circ);
}

.page-transition.entering {
  transform: translateY(0);
}

.page-transition.leaving {
  transform: translateY(-100%);
}

/* ---- Hover line sweep ---- */
.hover-sweep {
  position: relative;
  overflow: hidden;
}

.hover-sweep::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: -100%;
  width: 100%;
  height: 1px;
  background: var(--c-gold);
  transition: left var(--dur-base) var(--ease-out);
}

.hover-sweep:hover::after {
  left: 0;
}

/* ---- Cursor dot ---- */
.cursor {
  position: fixed;
  z-index: var(--z-top);
  pointer-events: none;
  mix-blend-mode: difference;
}

.cursor__dot {
  width: 8px;
  height: 8px;
  background: var(--c-text);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.2s var(--ease-out), height 0.2s var(--ease-out);
}

.cursor__ring {
  width: 36px;
  height: 36px;
  border: 1px solid rgba(255,255,255,0.5);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: all 0.15s var(--ease-out);
  position: absolute;
  top: 0;
  left: 0;
}

body:has(a:hover) .cursor__ring,
body:has(button:hover) .cursor__ring {
  width: 56px;
  height: 56px;
  border-color: var(--c-gold);
  opacity: 0.7;
}