/* ══════════════════════════════════════════════════════════════
   apps-estudio.css — /arandur, /arandil, /arantar (2-nov-2026)
   Sobre producto.css y tokens.css: no redefine marca, sólo piezas
   propias de las apps (capturas de teléfono, ejercicio de muestra,
   ciclo de estudio, comparación y preguntas frecuentes).
   ══════════════════════════════════════════════════════════════ */

.app-hero .container { display: grid; grid-template-columns: auto 1fr; gap: 1.6rem; align-items: center; }
.app-icono { width: 104px; height: 104px; border-radius: 24px; box-shadow: 0 10px 30px rgba(0, 195, 227, .25); }
.app-icono--texto {
  display: grid; place-items: center; background: linear-gradient(135deg, #121B22 50%, #DBDFE4 50%);
  color: #fff; font-weight: 800; font-size: 2.4rem; letter-spacing: -.02em;
  text-shadow: 0 0 18px rgba(0, 195, 227, .9);
}
.app-sello { display: flex; flex-wrap: wrap; gap: .5rem; margin: 0 0 1.4rem; padding: 0; list-style: none; }
.app-sello li { font-size: .82rem; padding: .3rem .7rem; border-radius: 999px; background: var(--highlight); color: var(--primary-text); font-weight: 600; }
.btn-play[aria-disabled="true"] { opacity: .65; pointer-events: none; }
@media (max-width: 640px) {
  .app-hero .container { grid-template-columns: 1fr; }
  .app-icono { width: 84px; height: 84px; }
}

/* ── Capturas: una fila que se desliza en el teléfono ──────── */
.app-capturas { display: flex; gap: 1rem; overflow-x: auto; scroll-snap-type: x mandatory; padding: .3rem .2rem 1rem; margin: 0 -.2rem; }
.app-capturas figure { flex: 0 0 auto; width: min(220px, 62vw); margin: 0; scroll-snap-align: start; }
.app-capturas img {
  width: 100%; height: auto; display: block; border-radius: 22px; border: 6px solid #121B22;
  box-shadow: 0 14px 34px rgba(18, 27, 34, .18); background: #121B22;
}
.app-capturas figcaption { font-size: .88rem; color: var(--muted); margin-top: .55rem; line-height: 1.45; }

/* ── El ciclo de estudio ──────────────────────────────────── */
.ciclo { display: grid; grid-template-columns: repeat(4, 1fr); gap: .9rem; counter-reset: c; }
.ciclo li { list-style: none; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 1.1rem 1rem; position: relative; }
.ciclo li::before {
  counter-increment: c; content: counter(c); display: grid; place-items: center; width: 2rem; height: 2rem; border-radius: 50%;
  background: var(--primary); color: var(--primary-on); font-weight: 800; margin-bottom: .6rem;
}
.ciclo strong { display: block; color: var(--text); margin-bottom: .3rem; }
.ciclo span { color: var(--muted); font-size: .95rem; line-height: 1.5; }
@media (max-width: 860px) { .ciclo { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .ciclo { grid-template-columns: 1fr; } }

/* ── Ejercicio de muestra ─────────────────────────────────── */
.muestra { background: var(--surface); border: 1.5px solid var(--primary); border-radius: 20px; padding: 1.3rem; box-shadow: 0 0 26px rgba(0, 195, 227, .15); max-width: 640px; }
.muestra-tema { font-size: .8rem; font-weight: 700; color: var(--primary-text); text-transform: uppercase; letter-spacing: .05em; margin: 0 0 .5rem; }
.muestra-pregunta { font-size: 1.15rem; font-weight: 600; color: var(--text); margin: 0 0 1rem; line-height: 1.45; }
.muestra-ops { display: grid; gap: .55rem; }
.muestra-ops button {
  text-align: left; font: inherit; font-size: 1rem; padding: .75rem 1rem; border-radius: 12px; cursor: pointer;
  border: 1px solid var(--border); background: var(--surface-2); color: var(--text); transition: border-color .15s, background .15s;
}
.muestra-ops button:hover:not(:disabled) { border-color: var(--primary); }
.muestra-ops button.mal { text-decoration: line-through; color: var(--muted); background: var(--error-bg); border-color: transparent; cursor: default; }
.muestra-ops button.bien { background: var(--success-bg); border-color: var(--success); font-weight: 700; }
.muestra-ops button.nueva::after { content: "nueva"; float: right; font-size: .72rem; font-weight: 700; color: var(--primary-text); background: var(--highlight); padding: .1rem .45rem; border-radius: 999px; }
.muestra-aviso { margin: .9rem 0 0; padding: .75rem .9rem; border-radius: 12px; line-height: 1.5; font-size: .97rem; }
.muestra-aviso:empty { display: none; }
.muestra-aviso.mal { background: var(--warning-bg); color: var(--text); }
.muestra-aviso.bien { background: var(--success-bg); color: var(--text); }
.muestra-aviso ol { margin: .5rem 0 0; padding-left: 1.2rem; }
.muestra-pie { font-size: .85rem; color: var(--muted); margin: .8rem 0 0; }
.muestra-otra { margin-top: .8rem; }

/* ── Comparación con un chat de IA ────────────────────────── */
.versus td:nth-child(2) { color: var(--text); }
.versus td:nth-child(3) { color: var(--muted); }

/* ── Preguntas frecuentes ─────────────────────────────────── */
.faq details { border-bottom: 1px solid var(--border); padding: .9rem 0; }
.faq summary { cursor: pointer; font-weight: 600; color: var(--text); list-style: none; display: flex; justify-content: space-between; gap: 1rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--primary-text); font-weight: 700; }
.faq details[open] summary::after { content: "−"; }
.faq details p { color: var(--muted); line-height: 1.6; margin: .6rem 0 0; }

/* ── La familia de apps ───────────────────────────────────── */
.familia { display: grid; grid-template-columns: repeat(3, 1fr); gap: .9rem; }
.familia a { display: block; text-decoration: none; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 1rem; color: var(--text); }
.familia a:hover { border-color: var(--primary); }
.familia a[aria-current="page"] { border-color: var(--primary); background: var(--highlight); }
.familia strong { display: block; }
.familia span { color: var(--muted); font-size: .92rem; }
@media (max-width: 640px) { .familia { grid-template-columns: 1fr; } }

@media (prefers-reduced-motion: reduce) { .muestra-ops button { transition: none; } }