/* ============================================================
   GREGSON STUDIOS AI : animations.css
   Scroll animations, hover effects, ticker, transitions
   ============================================================ */

/* ── Scroll Fade Up ─────────────────────────────────────────── */
.fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children : set --i inline style or use nth-child */
.stagger > *:nth-child(1) { transition-delay: 0s; }
.stagger > *:nth-child(2) { transition-delay: 0.1s; }
.stagger > *:nth-child(3) { transition-delay: 0.2s; }
.stagger > *:nth-child(4) { transition-delay: 0.3s; }
.stagger > *:nth-child(5) { transition-delay: 0.4s; }
.stagger > *:nth-child(6) { transition-delay: 0.5s; }

/* CSS variable stagger (for dynamic content) */
.stagger > * {
  transition-delay: calc(var(--i, 0) * 0.1s);
}

/* ── Expand Copper Line on Hover ────────────────────────────── */
.expand-line {
  position: relative;
  padding-bottom: 2px;
}

.expand-line::after {
  content: '';
  display: block;
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--copper);
  transition: width 0.4s ease;
}

.expand-line:hover::after {
  width: 100%;
}

/* ── Ticker / Marquee ───────────────────────────────────────── */
@keyframes ticker-scroll {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ── Reduced Motion ─────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .fade-up {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .stagger > * {
    transition-delay: 0s;
  }

  .ticker-track {
    animation: none;
  }

  .expand-line::after {
    transition: none;
  }
}