/* ═══════════════════════════════════════════════
   GRIMOIRE KIT — Motion & Reveal System
   ═══════════════════════════════════════════════ */

/* ── Scroll progress bar ── */
#scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0%;
  background: var(--accent);
  z-index: 1000;
  transition: width 80ms linear;
  pointer-events: none;
}

/* ── View transitions ── */
@keyframes vt-fade-out {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(-8px); }
}
@keyframes vt-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
::view-transition-old(root) {
  animation: 280ms var(--ease-in) vt-fade-out;
}
::view-transition-new(root) {
  animation: 280ms var(--ease-out) vt-fade-in;
}

/* ── Reveal: blur-in (hero elements) ── */
.reveal-blur {
  opacity: 0;
  filter: blur(12px);
  transform: translateY(12px);
  transition:
    opacity  var(--dur-slow) var(--ease-forge),
    filter   var(--dur-slow) var(--ease-forge),
    transform var(--dur-slow) var(--ease-forge);
}
.reveal-blur.visible { opacity: 1; filter: blur(0); transform: translateY(0); }

/* ── Reveal: slide-up (general) ── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity  600ms var(--ease-forge),
    transform 600ms var(--ease-forge);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ── Section divider line (draws left→right) ── */
.divider {
  height: 1px;
  background: var(--accent);
  width: 0%;
  margin-bottom: 56px;
  transition: width var(--dur-draw) var(--ease-out);
}
.divider.drawn { width: 100%; }

/* ── Manifeste block border reveal ── */
.manifeste-block {
  border-left: 2px solid transparent;
  transition: border-left-color 400ms var(--ease-forge);
}
.manifeste-block.lit { border-left-color: var(--accent); }

/* ── CTA shimmer ── */
@keyframes shimmer {
  from { left: -100%; }
  to   { left: 160%; }
}
.btn-primary::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 60%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.22), transparent);
  transform: skewX(-20deg);
  transition: left 400ms;
  pointer-events: none;
}
.btn-primary:hover::before { left: 160%; }
.btn-primary.shimmer-once::before {
  animation: shimmer 600ms var(--ease-forge) forwards;
}

/* ── CTA click spark ── */
@keyframes spark {
  0%   { opacity: 0.4; transform: scale(1); }
  100% { opacity: 0; transform: scale(1.06); }
}
.btn-primary:active::after {
  content: '';
  position: absolute; inset: 0;
  background: rgba(255,255,255,0.14);
  border-radius: inherit;
  animation: spark var(--dur-fast) forwards;
  pointer-events: none;
}

/* ── Timeline dot ── */
.timeline-dot {
  transition: background 400ms, box-shadow 400ms;
}
.timeline-dot.active {
  background: var(--accent) !important;
  box-shadow: 0 0 8px var(--accent-dim);
}

/* ── Timeline track fill ── */
.timeline-track-fill {
  transition: width 1200ms var(--ease-forge);
}

/* ── Surface card hover border sweep ── */
@property --sweep-angle {
  syntax: '<angle>';
  initial-value: 0deg;
  inherits: false;
}
@keyframes sweep-border {
  from { --sweep-angle: 0deg; }
  to   { --sweep-angle: 360deg; }
}
.surface-card:hover::before {
  opacity: 1;
  animation: sweep-border 240ms var(--ease-forge) forwards;
}

/* ── Cockpit cursor blink ── */
@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}
.cursor-blink { animation: blink 1.1s step-end infinite; }

/* ── Easter egg ── */
@keyframes egg-heat {
  0%   { color: var(--accent-hot); text-shadow: 0 0 20px var(--accent-hot); }
  60%  { color: var(--accent-hot); text-shadow: 0 0 32px var(--accent-hot); }
  100% { color: var(--accent); text-shadow: none; }
}
.forge-egg { animation: egg-heat 1.8s var(--ease-forge) forwards; }

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal-blur {
    opacity: 1 !important; transform: none !important; filter: none !important;
    transition: opacity 150ms !important;
  }
  .divider { transition: none; width: 100%; }
  .timeline-track-fill { transition: none; }
  ::view-transition-old(root),
  ::view-transition-new(root) { animation: none; }
  .cursor-blink { animation: none; opacity: 1; }
}