/* =============================================================================
   VERTEX DIMENSION — Motion
   Scroll reveal and keyframes. Cold precision — short, no overshoot.
   ========================================================================== */

/* Base reveal state — set by JS adding .reveal to candidates, then .is-in */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--dur-reveal) var(--ease-out),
    transform var(--dur-reveal) var(--ease-out);
  will-change: opacity, transform;
}
.reveal.is-in {
  opacity: 1;
  transform: none;
}

/* Staggered children: each step delays by --i * 60ms */
.reveal[style*="--i"] {
  transition-delay: calc(var(--i) * 0.06s);
}

/* Line-mask reveal for hero title words */
.mask-rise {
  opacity: 0;
  transform: translateY(110%);
  transition: opacity var(--dur-slow) var(--ease-out),
    transform var(--dur-slow) var(--ease-out);
}
.is-loaded .mask-rise {
  opacity: 1;
  transform: none;
}
.is-loaded .mask-rise:nth-child(1) { transition-delay: 0.05s; }
.is-loaded .mask-rise:nth-child(2) { transition-delay: 0.16s; }
.is-loaded .mask-rise:nth-child(3) { transition-delay: 0.27s; }

/* Generic fade for late hero elements */
.fade-up {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--dur-slow) var(--ease-out),
    transform var(--dur-slow) var(--ease-out);
}
.is-loaded .fade-up {
  opacity: 1;
  transform: none;
}
.is-loaded .fade-up[data-delay="1"] { transition-delay: 0.45s; }
.is-loaded .fade-up[data-delay="2"] { transition-delay: 0.6s; }
.is-loaded .fade-up[data-delay="3"] { transition-delay: 0.78s; }
.is-loaded .fade-up[data-delay="4"] { transition-delay: 0.95s; }

/* =============================================================================
   Keyframes
   ========================================================================== */
@keyframes cue-sweep {
  0% { transform: translateX(-100%); }
  55% { transform: translateX(100%); }
  100% { transform: translateX(100%); }
}

@keyframes blink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}
.caret::after {
  content: "_";
  margin-left: 0.1em;
  animation: blink 1.1s steps(1) infinite;
  color: var(--ink-050);
}

/* =============================================================================
   Reduced motion — honor the user's system preference completely
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal,
  .mask-rise,
  .fade-up {
    opacity: 1 !important;
    transform: none !important;
  }
  .scroll-cue__bar::after {
    display: none;
  }
}