/* ============================================
   ANIMATIONS — GSAP-coordinated + CSS
   ============================================ */

/* ── Reveal animation (used by GSAP ScrollTrigger) ── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
  transition: opacity var(--dur-slow) var(--ease),
              transform var(--dur-slow) var(--ease);
}

/* ── Stagger children ── */
.stagger-children > * {
  opacity: 0;
  transform: translateY(20px);
}

.stagger-children.active > * {
  opacity: 1;
  transform: translateY(0);
  transition: opacity var(--dur-normal) var(--ease),
              transform var(--dur-normal) var(--ease);
}

.stagger-children.active > *:nth-child(1) { transition-delay: 0s; }
.stagger-children.active > *:nth-child(2) { transition-delay: 0.1s; }
.stagger-children.active > *:nth-child(3) { transition-delay: 0.2s; }
.stagger-children.active > *:nth-child(4) { transition-delay: 0.3s; }
.stagger-children.active > *:nth-child(5) { transition-delay: 0.4s; }
.stagger-children.active > *:nth-child(6) { transition-delay: 0.5s; }

/* ── Image load animation ── */
.img-reveal {
  position: relative;
  overflow: hidden;
}

.img-reveal::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--c-bg);
  transform: scaleX(1);
  transform-origin: right;
  transition: transform var(--dur-slow) var(--ease-out);
}

.img-reveal.revealed::after {
  transform: scaleX(0);
}

/* ── Line draw ── */
.line-draw {
  width: 0;
  height: 1px;
  background: var(--c-border);
  transition: width var(--dur-slow) var(--ease);
}

.line-draw.active {
  width: 100%;
}

/* ── Text clip reveal ── */
.text-reveal {
  overflow: hidden;
  display: inline-block;
}

.text-reveal-inner {
  display: inline-block;
  transform: translateY(100%);
  transition: transform var(--dur-normal) var(--ease);
}

.text-reveal.active .text-reveal-inner {
  transform: translateY(0);
}

/* ── Fade in up ── */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── Gentle pulse ── */
@keyframes gentlePulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* ── Page transition ── */
.page-transition {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--c-bg);
  z-index: 9999;
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform var(--dur-normal) var(--ease);
}

.page-transition.enter {
  transform: scaleY(1);
  transform-origin: top;
}

.page-transition.exit {
  transform: scaleY(0);
  transform-origin: bottom;
}

/* ── Scroll hint ── */
.scroll-hint {
  position: absolute;
  bottom: var(--sp-5);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-2);
}

.scroll-hint span {
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: var(--ls-widest);
  color: var(--c-text-muted);
}

.scroll-hint-line {
  width: 1px;
  height: 40px;
  background: var(--c-border);
  position: relative;
  overflow: hidden;
}

.scroll-hint-line::after {
  content: '';
  position: absolute;
  top: -100%;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--c-text);
  animation: scrollDown 2s var(--ease) infinite;
}

@keyframes scrollDown {
  0% { top: -100%; }
  50% { top: 0; }
  100% { top: 100%; }
}

/* ── Menu animations ── */
.menu-overlay .menu-nav-link {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity var(--dur-normal) var(--ease),
              transform var(--dur-normal) var(--ease);
}

.menu-overlay.open .menu-nav-link {
  opacity: 1;
  transform: translateY(0);
}

.menu-overlay.open .menu-nav-link:nth-child(1) { transition-delay: 0.15s; }
.menu-overlay.open .menu-nav-link:nth-child(2) { transition-delay: 0.2s; }
.menu-overlay.open .menu-nav-link:nth-child(3) { transition-delay: 0.25s; }
.menu-overlay.open .menu-nav-link:nth-child(4) { transition-delay: 0.3s; }
.menu-overlay.open .menu-nav-link:nth-child(5) { transition-delay: 0.35s; }