/* ═══════════════════════════════════════
   ECHO — effects.css
   Reveal · Parallax · Transitions
   ═══════════════════════════════════════ */



/* ── 1. Scroll Text Reveal ── */
.reveal-split {
  overflow: hidden;
  display: block;
}

.reveal-split__inner {
  display: block;
  transform: translateY(105%);
  transition: transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
  transition-delay: calc(var(--line-i, 0) * 0.11s);
  animation: splitFailsafe 0s ease 4s forwards;
}
@keyframes splitFailsafe {
  to { transform: translateY(0); }
}

.is-revealed .reveal-split__inner {
  transform: translateY(0);
  animation: none;
}



/* ── 2. Staggered Entrance ── */
.echo-animate {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.65s ease, transform 0.65s ease;
  transition-delay: var(--stagger-delay, 0ms);
}

.echo-animate.is-visible {
  opacity: 1;
  transform: translateY(0);
}



/* ── 3. Page Transition Overlay ── */
.page-overlay {
  position: fixed;
  inset: 0;
  z-index: 99990;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.45s ease, visibility 0.45s ease;
}

.page-overlay.is-entering {
  opacity: 1;
  visibility: visible;
  pointer-events: all;
}

.page-overlay.is-leaving {
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.6s ease 0.1s, visibility 0.6s ease 0.1s;
}

.page-overlay__logo {
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 700;
  font-style: italic;
  color: var(--text);
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.4s ease, transform 0.4s ease;
  letter-spacing: 0.01em;
  position: relative;
  z-index: 1;
}

.page-overlay.is-entering .page-overlay__logo {
  opacity: 1;
  transform: scale(1);
}

.page-overlay__ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--accent);
  top: 50%; left: 50%;
  transform: translate(-50%, -50%) scale(0);
  opacity: 0;
}

.page-overlay__ring--1 { width: 80px;  height: 80px; }
.page-overlay__ring--2 { width: 200px; height: 200px; }
.page-overlay__ring--3 { width: 400px; height: 400px; }
.page-overlay__ring--4 { width: 700px; height: 700px; }

.page-overlay.is-entering .page-overlay__ring--1 { animation: overlayRing 0.9s ease-out 0.05s forwards; }
.page-overlay.is-entering .page-overlay__ring--2 { animation: overlayRing 0.9s ease-out 0.15s forwards; }
.page-overlay.is-entering .page-overlay__ring--3 { animation: overlayRing 0.9s ease-out 0.25s forwards; }
.page-overlay.is-entering .page-overlay__ring--4 { animation: overlayRing 0.9s ease-out 0.35s forwards; }

@keyframes overlayRing {
  0%   { transform: translate(-50%, -50%) scale(0.1); opacity: 0.7; }
  100% { transform: translate(-50%, -50%) scale(1);   opacity: 0; }
}



/* ── Disable effects on reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  .reveal-split__inner { transform: none; transition: none; }
  .echo-animate        { opacity: 1; transform: none; transition: none; }
  .page-overlay        { display: none; }
}