/* ============================================================
   scrolly.css — Scrollytelling NYT/Pudding (B-S4)
   Barra de lectura, chip de acto, reveals en trío, pausa.
   Cero dependencias. No toca content-visibility.
   ============================================================ */

:root {
  --scrolly-cyan: #3ee0d4;
  --scrolly-gold: var(--gold, #e8b84b);
  --scrolly-ease: var(--ease, cubic-bezier(0.22, 1, 0.36, 1));
}

/* ---------- 1. Barra de progreso (fija, 3px, oro → cian) ---------- */
.scrolly-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 1001;
  pointer-events: none;
  background: rgba(255, 255, 255, 0.06);
}

.scrolly-progress-fill {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(var(--p, 0));
  transform-origin: left center;
  background: linear-gradient(90deg, var(--scrolly-gold), var(--scrolly-cyan));
  will-change: transform;
}

/* La barra legacy queda debajo (mismo 3px) y no habla a AT. */
html.js #progress-bar {
  z-index: 999;
}

/* ---------- 2. Chip de acto (bottom-right, mono 10px; z < charts) ---------- */
.scrolly-act {
  position: fixed;
  left: auto;
  right: max(14px, env(safe-area-inset-right));
  bottom: max(14px, env(safe-area-inset-bottom));
  z-index: 4;
  margin: 0;
  padding: 4px 8px;
  border: 1px solid var(--line, rgba(255, 255, 255, 0.09));
  border-radius: 999px;
  background: rgba(7, 9, 15, 0.72);
  color: var(--ink-3, #7e8798);
  font-family: var(--font-mono, "JetBrains Mono", ui-monospace, Menlo, monospace);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.06em;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.28);
  transition: color 180ms var(--scrolly-ease), border-color 180ms var(--scrolly-ease), background 180ms var(--scrolly-ease);
}

.scrolly-act:hover {
  color: var(--ink, #eef1f7);
  border-color: rgba(232, 184, 75, 0.45);
}

.scrolly-act:focus-visible {
  outline: 2px solid var(--scrolly-gold);
  outline-offset: 3px;
  color: var(--ink, #eef1f7);
}

.scrolly-act[hidden] {
  display: none;
}

/* ---------- 3. Reveals: data-d + .reveal-step (de 3 en 3) ---------- */
html.js .reveal[data-d="0"] { transition-delay: 0s; }
html.js .reveal[data-d="1"] { transition-delay: 0.08s; }
html.js .reveal[data-d="2"] { transition-delay: 0.16s; }
html.js .reveal[data-d="3"] { transition-delay: 0.24s; }
html.js .reveal[data-d="4"] { transition-delay: 0.32s; }
html.js .reveal[data-d="5"] { transition-delay: 0.40s; }

html.js .reveal-step {
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 0.42s var(--scrolly-ease),
    transform 0.42s var(--scrolly-ease);
  transition-delay: calc(var(--batch, 0) * 0.32s + var(--d, 0) * 0.08s);
}

html.js .reveal-step[data-d="0"] { --d: 0; }
html.js .reveal-step[data-d="1"] { --d: 1; }
html.js .reveal-step[data-d="2"] { --d: 2; }

html.js .reveal-step.is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 4. Pausa narrativa (#crac, #corea) ---------- */
section.chapter.scrolly-beat {
  box-shadow: inset 0 1px 0 var(--scrolly-gold);
}

section.chapter.scrolly-beat::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--scrolly-gold);
  pointer-events: none;
  z-index: 2;
  animation: scrolly-beat-line 800ms var(--scrolly-ease) forwards;
}

@keyframes scrolly-beat-line {
  from { width: 0; }
  to   { width: 100%; }
}

/* ---------- 5. Reduced motion: estático ---------- */
@media (prefers-reduced-motion: reduce) {
  .scrolly-progress-fill,
  .scrolly-act,
  html.js .reveal[data-d],
  html.js .reveal-step {
    transition: none !important;
    animation: none !important;
  }

  html.js .reveal-step {
    opacity: 1;
    transform: none;
  }

  section.chapter.scrolly-beat::before {
    width: 100%;
    animation: none;
  }
}

/* Modo presentación: no competir con la barra de diapositiva */
body.presenting .scrolly-progress,
body.presenting .scrolly-act {
  opacity: 0 !important;
  visibility: hidden !important;
  pointer-events: none !important;
}

@media print {
  .scrolly-progress,
  .scrolly-act {
    display: none !important;
  }

  html.js .reveal-step {
    opacity: 1 !important;
    transform: none !important;
  }
}

@media (max-width: 559px) {
  .scrolly-act {
    display: none;
  }
}