/* ============================================================================
   VISION ENGLISH — REPRODUCTOR DE ACTIVIDADES
   Una pregunta por pantalla. Barra que se llena arriba, la pregunta en medio,
   y abajo la barra de resultado con el botón para continuar.
   ========================================================================= */

.act-app {
  margin-top: 18px;
  border-radius: 22px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 430px;
  background: linear-gradient(150deg, rgba(255, 255, 255, .62), rgba(255, 255, 255, .42));
  backdrop-filter: blur(20px) saturate(150%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  border: 1px solid rgba(255, 255, 255, .55);
  box-shadow:
    inset 1px 1px 0 rgba(255, 255, 255, .7),
    inset -1px -1px 0 rgba(30, 35, 60, .07),
    0 4px 16px rgba(20, 24, 45, .09),
    0 16px 46px rgba(45, 54, 88, .1);
}

body.dark .act-app {
  background: linear-gradient(150deg, rgba(255, 255, 255, .06), rgba(255, 255, 255, .025));
  border-color: rgba(255, 255, 255, .1);
  box-shadow:
    inset 1px 1px 0 rgba(255, 255, 255, .12),
    inset -1px -1px 0 rgba(0, 0, 0, .3),
    0 4px 18px rgba(0, 0, 0, .32),
    0 16px 46px rgba(0, 0, 0, .35);
}

/* ── UN COLOR POR TIPO DE ACTIVIDAD ──────────────────────────────────────────
   Antes todo era blanco con el neón del nivel: ocho actividades distintas se
   veían iguales. Ahora cada tipo trae su propio color, así el alumno reconoce
   de un vistazo qué le tocó antes de leer la instrucción.

   La barra de avance NO cambia: esa conserva el color del nivel, porque es
   identidad del curso y no de la pregunta.
   ------------------------------------------------------------------------- */

.act-app {
  --act:      var(--neon, hsl(272, 100%, 68%));
  --act-2:    var(--neon-2, hsl(187, 100%, 55%));
  --act-soft: var(--neon-soft, rgba(124, 58, 237, .14));
}

.act-app[data-tipo="significados"] { --act: hsl(174, 72%, 42%); --act-2: hsl(160, 70%, 45%); --act-soft: hsla(174, 72%, 42%, .14); }
.act-app[data-tipo="opcion"]       { --act: hsl(266, 85%, 62%); --act-2: hsl(286, 80%, 62%); --act-soft: hsla(266, 85%, 62%, .14); }
.act-app[data-tipo="vf"]           { --act: hsl(38, 95%, 52%);  --act-2: hsl(26, 95%, 56%);  --act-soft: hsla(38, 95%, 52%, .16); }
.act-app[data-tipo="escucha"]      { --act: hsl(206, 90%, 52%); --act-2: hsl(192, 88%, 48%); --act-soft: hsla(206, 90%, 52%, .14); }
.act-app[data-tipo="huecos"]       { --act: hsl(330, 82%, 58%); --act-2: hsl(348, 85%, 60%); --act-soft: hsla(330, 82%, 58%, .13); }
.act-app[data-tipo="oracion"]      { --act: hsl(146, 65%, 42%); --act-2: hsl(166, 68%, 42%); --act-soft: hsla(146, 65%, 42%, .14); }
.act-app[data-tipo="habla"]        { --act: hsl(14, 88%, 58%);  --act-2: hsl(30, 92%, 58%);  --act-soft: hsla(14, 88%, 58%, .14); }
.act-app[data-tipo="completa"]     { --act: hsl(238, 78%, 62%); --act-2: hsl(256, 80%, 64%); --act-soft: hsla(238, 78%, 62%, .14); }
.act-app[data-tipo="traduce"]      { --act: hsl(300, 70%, 56%); --act-2: hsl(318, 75%, 58%); --act-soft: hsla(300, 70%, 56%, .14); }
.act-app[data-tipo="escribe"]      { --act: hsl(258, 82%, 60%); --act-2: hsl(276, 78%, 62%); --act-soft: hsla(258, 82%, 60%, .14); }

/* La instrucción se tiñe del color de su actividad: es la primera pista. */
.act-instruccion { color: var(--act); }

/* ── Arriba: avance y racha ──────────────────────────────────────────────── */
.act-top {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 22px 0;
}

.act-barra {
  flex: 1;
  height: 13px;
  border-radius: 999px;
  background: var(--line, rgba(111, 122, 157, .18));
  overflow: hidden;
}

.act-barra-fill {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--neon, hsl(38,100%,58%)), var(--neon-2, hsl(24,100%,62%)));
  box-shadow: 0 0 12px -2px var(--neon, hsl(38,100%,58%));
  transition: width .45s cubic-bezier(.4, 0, .2, 1);
}

.act-racha {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px;
  border-radius: 999px;
  background: hsla(24, 100%, 58%, .16);
  color: hsl(20, 90%, 44%);
  font-size: .84rem;
  font-weight: 800;
  animation: actPop .3s cubic-bezier(.34, 1.56, .64, 1);
}
body.dark .act-racha { color: hsl(30, 100%, 68%); }

@keyframes actPop {
  from { transform: scale(.6); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

/* ── En medio: la pregunta ───────────────────────────────────────────────── */
.act-cuerpo {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 22px 30px 26px;
  gap: 18px;
}

.act-instruccion {
  margin: 0;
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .07em;
  text-transform: uppercase;
  /* El color NO se declara aquí: lo pone la regla de arriba con var(--act),
     que le da a cada tipo de actividad el suyo. Antes había un
     `color: var(--muted)` en esta línea que, por ir después, pisaba aquella
     y dejaba la instrucción siempre gris. */
}

.act-escena {
  animation: actEntrar .28s cubic-bezier(.16, 1, .3, 1);
}

@keyframes actEntrar {
  from { opacity: 0; transform: translateX(18px); }
  to { opacity: 1; transform: none; }
}

.act-pregunta {
  margin: 0 0 20px;
  font-size: 1.28rem;
  font-weight: 700;
  line-height: 1.42;
  letter-spacing: -.015em;
}

.act-contexto {
  margin: 0 0 16px;
  padding: 12px 15px;
  border-radius: 12px;
  background: var(--act-soft, rgba(124, 58, 237, .1));
  font-size: .9rem;
  line-height: 1.5;
  color: var(--text-secondary, var(--muted));
}

/* ── Opciones ────────────────────────────────────────────────────────────── */
.act-opciones { display: grid; gap: 10px; }

.act-opcion {
  display: flex;
  align-items: center;
  gap: 13px;
  width: 100%;
  padding: 15px 18px;
  border: 1.5px solid rgba(255, 255, 255, .6);
  border-radius: 15px;
  background: rgba(255, 255, 255, .5);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow:
    inset 1px 1px 0 rgba(255, 255, 255, .6),
    inset -1px -1px 0 rgba(30, 35, 60, .05),
    0 2px 8px rgba(20, 24, 45, .05);
  color: inherit;
  font: inherit;
  font-size: 1rem;
  text-align: left;
  cursor: pointer;
  transition: border-color .15s, background .15s, transform .1s;
}
body.dark .act-opcion { background: rgba(255, 255, 255, .05); border-color: rgba(255, 255, 255, .1); box-shadow: inset 1px 1px 0 rgba(255,255,255,.1), inset -1px -1px 0 rgba(0,0,0,.25); }

.act-opcion:hover:not(:disabled) { border-color: var(--act, var(--purple)); }
.act-opcion:active:not(:disabled) { transform: scale(.99); }
.act-opcion:disabled { cursor: default; }

.act-opcion.sel {
  border-color: var(--act, var(--purple));
  background: var(--act-soft, rgba(124, 58, 237, .12));
}
.act-opcion.sel .act-radio {
  border-color: var(--act, var(--purple));
  background: var(--act, var(--purple)) radial-gradient(circle, #fff 30%, transparent 32%);
}

.act-radio {
  width: 21px; height: 21px;
  border-radius: 50%;
  border: 2px solid var(--line, rgba(111, 122, 157, .38));
  flex-shrink: 0;
  transition: border-color .15s, background .15s;
}

.act-opcion.correcta {
  border-color: hsl(150, 62%, 44%);
  background: hsla(150, 62%, 44%, .13);
}
.act-opcion.correcta .act-radio {
  border-color: hsl(150, 62%, 40%);
  background: hsl(150, 62%, 42%) radial-gradient(circle, #fff 30%, transparent 32%);
}
.act-opcion.incorrecta {
  border-color: hsl(354, 78%, 58%);
  background: hsla(354, 78%, 58%, .1);
}
.act-opcion.incorrecta .act-radio {
  border-color: hsl(354, 72%, 52%);
  background: hsl(354, 78%, 58%);
}

/* ── Unir palabras ───────────────────────────────────────────────────────── */
.act-unir { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.act-col { display: grid; gap: 9px; align-content: start; }

.act-chip {
  padding: 13px 14px;
  border: 2px solid var(--line, rgba(111, 122, 157, .22));
  border-radius: 13px;
  background: var(--surface-strong, #fff);
  color: inherit;
  font: inherit;
  font-size: .96rem;
  cursor: pointer;
  transition: all .15s;
}
body.dark .act-chip { background: rgba(255, 255, 255, .05); }

.act-chip:hover:not(.ok) { border-color: var(--act, var(--purple)); }
.act-chip.sel {
  border-color: var(--act, var(--purple));
  background: var(--act-soft, rgba(124, 58, 237, .16));
  transform: scale(1.03);
}
.act-chip.ok {
  border-color: hsl(150, 62%, 44%);
  background: hsla(150, 62%, 44%, .13);
  color: hsl(150, 62%, 28%);
  cursor: default;
  opacity: .8;
}
body.dark .act-chip.ok { color: hsl(150, 65%, 70%); }
.act-chip.error {
  border-color: hsl(354, 78%, 58%);
  background: hsla(354, 78%, 58%, .12);
  animation: actTemblor .3s;
}

@keyframes actTemblor {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

/* ── Huecos ──────────────────────────────────────────────────────────────── */
.act-texto-huecos {
  font-size: 1.02rem;
  line-height: 2.6;
}

.act-select {
  padding: 7px 11px;
  border: 2px solid var(--line, rgba(111, 122, 157, .3));
  border-radius: 10px;
  background: var(--surface-strong, #fff);
  color: inherit;
  font: inherit;
  font-size: .94rem;
  cursor: pointer;
  min-width: 135px;
}
body.dark .act-select { background: rgba(255, 255, 255, .09); }
.act-select:focus { outline: none; border-color: var(--act, var(--purple)); }
.act-select.correcta { border-color: hsl(150, 62%, 44%); background: hsla(150, 62%, 44%, .14); }
.act-select.incorrecta { border-color: hsl(354, 78%, 58%); background: hsla(354, 78%, 58%, .12); }

/* ── Armar oración ───────────────────────────────────────────────────────── */
.act-espanol {
  margin: 0 0 16px;
  font-size: 1.16rem;
  font-weight: 700;
}

.act-linea {
  min-height: 58px;
  padding: 11px;
  margin-bottom: 18px;
  border-bottom: 3px dashed var(--line, rgba(111, 122, 157, .3));
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-content: flex-start;
}

.act-banco { display: flex; flex-wrap: wrap; gap: 8px; }

.act-palabra {
  padding: 11px 16px;
  border: 2px solid var(--line, rgba(111, 122, 157, .22));
  border-radius: 12px;
  background: var(--surface-strong, #fff);
  color: inherit;
  font: inherit;
  font-size: .98rem;
  cursor: pointer;
  transition: all .14s;
}
body.dark .act-palabra { background: rgba(255, 255, 255, .06); }
.act-palabra:hover:not(:disabled) { border-color: var(--act, var(--purple)); transform: translateY(-2px); }
.act-palabra:disabled { opacity: .25; cursor: default; }
.act-palabra.puesta {
  background: var(--act-soft, rgba(124, 58, 237, .18));
  border-color: transparent;
  opacity: 1;
}

/* ── Hablar ──────────────────────────────────────────────────────────────── */
.act-habla { text-align: center; }

.act-frase-modelo {
  margin: 0 0 8px;
  font-size: 1.55rem;
  font-weight: 750;
  line-height: 1.3;
  letter-spacing: -.02em;
  color: var(--act-2, var(--purple));
}
.act-frase-es { margin: 0 0 20px; font-size: .96rem; color: var(--muted); }

.act-audio {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 11px 20px;
  margin-bottom: 18px;
  border: 2px solid var(--act, var(--purple));
  border-radius: 999px;
  background: var(--act-soft, rgba(124, 58, 237, .1));
  color: inherit;
  font: inherit;
  font-weight: 700;
  font-size: .94rem;
  cursor: pointer;
  transition: background .15s, color .15s;
}
.act-audio:hover { background: var(--act, var(--purple)); color: #fff; }
.act-audio.sonando { animation: vcPulso 1.1s ease-in-out infinite; }

.act-textarea {
  width: 100%;
  padding: 14px;
  border: 2px solid var(--line, rgba(111, 122, 157, .22));
  border-radius: 14px;
  background: var(--surface-strong, #fff);
  color: inherit;
  font: inherit;
  resize: vertical;
}
body.dark .act-textarea { background: rgba(255, 255, 255, .05); }

/* ── Escribir la respuesta (completar / traducir) ─────────────────────────── */
.act-input {
  width: 100%;
  padding: 15px 18px;
  border: 2px solid var(--line, rgba(111, 122, 157, .22));
  border-radius: 15px;
  background: var(--surface-strong, #fff);
  color: inherit;
  font: inherit;
  font-size: 1.08rem;
  transition: border-color .15s, background .15s;
}
body.dark .act-input { background: rgba(255, 255, 255, .05); }
.act-input:focus { outline: none; border-color: var(--act, var(--purple)); }
.act-input.correcta { border-color: hsl(150, 62%, 44%); background: hsla(150, 62%, 44%, .12); }
.act-input.incorrecta { border-color: hsl(354, 78%, 58%); background: hsla(354, 78%, 58%, .1); }
.act-input:disabled { opacity: 1; }

/* ── Abajo: resultado y botón ────────────────────────────────────────────── */
.act-pie {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 22px;
  border-top: 2px solid var(--line, rgba(111, 122, 157, .14));
  background: rgba(255, 255, 255, .38);
  transition: background .25s, border-color .25s;
}
body.dark .act-pie { background: rgba(0, 0, 0, .18); }

.act-pie.bien {
  background: hsla(150, 62%, 44%, .16);
  border-color: hsla(150, 62%, 44%, .45);
}
.act-pie.mal {
  background: hsla(354, 78%, 58%, .13);
  border-color: hsla(354, 78%, 58%, .4);
}
.act-pie.act-pie-fin { justify-content: center; }

.act-resultado {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: .9rem;
  line-height: 1.45;
  animation: actAsomar .22s ease;
}
.act-resultado strong { font-size: 1rem; font-weight: 800; }
.act-resultado span { color: var(--text-secondary, var(--muted)); }

.act-pie.bien .act-resultado strong { color: hsl(150, 62%, 30%); }
.act-pie.mal .act-resultado strong { color: hsl(354, 68%, 46%); }
body.dark .act-pie.bien .act-resultado strong { color: hsl(150, 65%, 68%); }
body.dark .act-pie.mal .act-resultado strong { color: hsl(354, 90%, 74%); }

@keyframes actAsomar {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

.act-cta {
  flex-shrink: 0;
  padding: 14px 34px;
  border: 0;
  border-radius: 14px;
  background: var(--line, rgba(111, 122, 157, .2));
  color: var(--muted);
  font: inherit;
  font-weight: 800;
  font-size: .95rem;
  letter-spacing: .02em;
  cursor: pointer;
  transition: transform .14s, box-shadow .18s;
}
.act-cta:disabled { cursor: default; }

.act-cta-on {
  background: linear-gradient(135deg, var(--act, var(--purple)), var(--act-2, var(--purple-2)));
  color: #fff;
  box-shadow: 0 9px 22px -6px var(--act, rgba(124, 58, 237, .55));
}
.act-cta-on:hover { transform: translateY(-2px); }
.act-cta-on:active { transform: translateY(0); }

/* ── Pantalla final ──────────────────────────────────────────────────────── */
.act-fin { text-align: center; }
.act-fin-icono { font-size: 3.4rem; margin-bottom: 8px; }
.act-fin-titulo { margin: 0 0 8px; font-size: 1.5rem; letter-spacing: -.02em; }
.act-fin-texto { margin: 0 0 20px; font-size: 1.02rem; color: var(--text-secondary, var(--muted)); }

.act-boton-suave {
  padding: 12px 22px;
  border: 2px solid var(--line, rgba(111, 122, 157, .25));
  border-radius: 13px;
  background: transparent;
  color: inherit;
  font: inherit;
  font-weight: 700;
  font-size: .94rem;
  cursor: pointer;
}
.act-boton-suave:hover { background: var(--act-soft, rgba(124, 58, 237, .1)); }

/* ── Teléfono ────────────────────────────────────────────────────────────── */
@media (max-width: 780px) {
  .act-app { min-height: 400px; }
  .act-cuerpo { padding: 18px 18px 22px; }
  .act-top { padding: 14px 18px 0; }
  .act-pregunta { font-size: 1.1rem; }
  .act-frase-modelo { font-size: 1.25rem; }
  .act-unir { gap: 8px; }
  .act-chip { font-size: .88rem; padding: 11px 9px; }
  .act-texto-huecos { font-size: .95rem; line-height: 2.7; }
  .act-select { min-width: 115px; }
  .act-pie { flex-direction: column; align-items: stretch; gap: 12px; padding: 14px 18px; }
  .act-cta { width: 100%; padding: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  .act-escena, .act-resultado, .act-racha, .act-chip.error { animation: none; }
  .act-barra-fill { transition: none; }
  .act-cta-on:hover, .act-palabra:hover:not(:disabled) { transform: none; }
}

/* ============================================================================
   MESAS DE JUEGO V2
   Cada tipo conserva su contenido y su logica, pero cambia de escenario para
   que escuchar, unir, ordenar y escribir no parezcan la misma actividad.
   ========================================================================= */

.lesson-detail-view .act-app {
  min-height: 520px;
  background:
    linear-gradient(125deg, color-mix(in srgb, var(--act) 12%, rgba(255, 255, 255, .68)), rgba(255, 255, 255, .52) 42%, color-mix(in srgb, var(--act-2) 10%, rgba(255, 255, 255, .48)));
  border: 1px solid rgba(255, 255, 255, .78);
  border-radius: 20px;
  box-shadow: 0 22px 56px rgba(35, 44, 76, .14), inset 0 1px 0 rgba(255, 255, 255, .86);
  backdrop-filter: blur(26px) saturate(160%);
  -webkit-backdrop-filter: blur(26px) saturate(160%);
  transition: background .35s ease, box-shadow .35s ease;
}

body.dark .lesson-detail-view .act-app {
  background:
    linear-gradient(125deg, color-mix(in srgb, var(--act) 12%, rgba(20, 25, 40, .82)), rgba(20, 25, 40, .72) 46%, color-mix(in srgb, var(--act-2) 9%, rgba(20, 25, 40, .72)));
  border-color: rgba(255, 255, 255, .12);
}

.lesson-detail-view .act-top {
  padding: 22px 26px 0;
}

.lesson-detail-view .act-barra {
  height: 10px;
  background: rgba(255, 255, 255, .5);
  border: 1px solid rgba(255, 255, 255, .7);
  box-shadow: inset 0 2px 5px rgba(40, 48, 78, .08);
}

body.dark .lesson-detail-view .act-barra { background: rgba(255, 255, 255, .07); border-color: rgba(255, 255, 255, .09); }

.lesson-detail-view .act-cuerpo {
  display: grid;
  grid-template-columns: minmax(170px, 220px) minmax(0, 1fr);
  align-items: stretch;
  justify-content: initial;
  gap: 20px;
  padding: 24px 28px 30px;
}

.lesson-detail-view .act-instruccion {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: 300px;
  margin: 0;
  padding: 22px;
  color: #172033;
  background:
    linear-gradient(160deg, color-mix(in srgb, var(--act) 28%, rgba(255, 255, 255, .82)), color-mix(in srgb, var(--act-2) 15%, rgba(255, 255, 255, .54)));
  border: 1px solid rgba(255, 255, 255, .8);
  border-radius: 16px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .9), 0 14px 32px color-mix(in srgb, var(--act) 13%, rgba(30, 38, 68, .08));
  font-size: .8rem;
  line-height: 1.5;
  letter-spacing: .06em;
  overflow: hidden;
}

.lesson-detail-view .act-instruccion::before {
  content: "";
  position: absolute;
  width: 86px;
  height: 86px;
  top: 20px;
  left: 20px;
  border: 12px solid color-mix(in srgb, var(--act) 38%, transparent);
  border-right-color: color-mix(in srgb, var(--act-2) 56%, transparent);
  border-radius: 50%;
  transform: rotate(-18deg);
  opacity: .72;
}

.lesson-detail-view .act-instruccion::after {
  content: "";
  position: absolute;
  top: 124px;
  left: 22px;
  width: 64px;
  height: 5px;
  background: linear-gradient(90deg, var(--act), var(--act-2));
  border-radius: 999px;
  box-shadow: 0 12px 0 color-mix(in srgb, var(--act) 22%, transparent);
}

body.dark .lesson-detail-view .act-instruccion { color: #f5f7ff; border-color: rgba(255, 255, 255, .13); }

.lesson-detail-view .act-escena {
  min-width: 0;
  min-height: 300px;
  align-content: center;
  padding: clamp(22px, 4vw, 42px);
  background: rgba(255, 255, 255, .56);
  border: 1px solid rgba(255, 255, 255, .82);
  border-radius: 16px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .9), 0 14px 34px rgba(36, 45, 76, .08);
  backdrop-filter: blur(16px) saturate(145%);
  -webkit-backdrop-filter: blur(16px) saturate(145%);
  animation: actBoardIn .36s cubic-bezier(.2, .8, .2, 1);
}

body.dark .lesson-detail-view .act-escena { background: rgba(12, 17, 30, .5); border-color: rgba(255, 255, 255, .09); }

@keyframes actBoardIn {
  from { opacity: 0; transform: translateY(10px) scale(.985); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.lesson-detail-view .act-pregunta,
.lesson-detail-view .act-frase-modelo,
.lesson-detail-view .act-fin-titulo { letter-spacing: 0; }

.lesson-detail-view .act-opcion,
.lesson-detail-view .act-chip,
.lesson-detail-view .act-palabra,
.lesson-detail-view .act-input,
.lesson-detail-view .act-textarea,
.lesson-detail-view .act-select {
  box-shadow: 0 7px 16px rgba(38, 47, 78, .07), inset 0 1px 0 rgba(255, 255, 255, .72);
}

.lesson-detail-view .act-opcion:hover:not(:disabled),
.lesson-detail-view .act-chip:hover:not(.ok),
.lesson-detail-view .act-palabra:hover:not(:disabled) {
  transform: translateY(-3px);
  box-shadow: 0 13px 24px color-mix(in srgb, var(--act) 14%, rgba(38, 47, 78, .08));
}

.lesson-detail-view .act-opcion:active:not(:disabled),
.lesson-detail-view .act-chip:active:not(.ok),
.lesson-detail-view .act-palabra:active:not(:disabled),
.lesson-detail-view .act-cta-on:active {
  transform: translateY(1px) scale(.985);
}

/* Unir: dos tableros claramente rotulados, ingles a la izquierda y espanol a la derecha. */
.lesson-detail-view .act-app[data-tipo="significados"] .act-unir { gap: 18px; }
.lesson-detail-view .act-app[data-tipo="significados"] .act-col {
  position: relative;
  padding: 48px 12px 12px;
  border: 1px dashed color-mix(in srgb, var(--act) 38%, transparent);
  border-radius: 15px;
  background: color-mix(in srgb, var(--act) 7%, rgba(255, 255, 255, .44));
}
.lesson-detail-view .act-app[data-tipo="significados"] .act-col::before {
  position: absolute;
  top: 14px;
  left: 14px;
  font-size: .68rem;
  font-weight: 900;
  letter-spacing: .08em;
  color: var(--act);
}
.lesson-detail-view .act-app[data-tipo="significados"] .act-col:first-child::before { content: "EN · ENGLISH"; }
.lesson-detail-view .act-app[data-tipo="significados"] .act-col:last-child::before { content: "ES · ESPAÑOL"; }

/* Verdadero o falso: decision binaria con dos zonas visuales. */
.lesson-detail-view .act-app[data-tipo="vf"] .act-opciones {
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.lesson-detail-view .act-app[data-tipo="vf"] .act-opcion {
  min-height: 100px;
  justify-content: center;
  font-size: 1.08rem;
  font-weight: 800;
  text-align: center;
}
.lesson-detail-view .act-app[data-tipo="vf"] .act-opcion:first-child { background: rgba(32, 201, 151, .12); border-color: rgba(32, 201, 151, .32); }
.lesson-detail-view .act-app[data-tipo="vf"] .act-opcion:last-child { background: rgba(239, 71, 111, .1); border-color: rgba(239, 71, 111, .3); }

/* Escucha: una pequena pista visual de audio sin cambiar el reproductor. */
.lesson-detail-view .act-app[data-tipo="escucha"] .act-escena {
  background:
    repeating-linear-gradient(90deg, transparent 0 17px, color-mix(in srgb, var(--act) 8%, transparent) 17px 20px),
    rgba(255, 255, 255, .58);
}
.lesson-detail-view .act-app[data-tipo="escucha"] .act-audio {
  min-height: 58px;
  padding-inline: 26px;
  box-shadow: 0 12px 28px color-mix(in srgb, var(--act) 22%, transparent);
}

/* Ordenar: la linea de armado se convierte en una mesa de piezas. */
.lesson-detail-view .act-app[data-tipo="oracion"] .act-linea {
  min-height: 86px;
  padding: 18px;
  border: 2px dashed color-mix(in srgb, var(--act) 45%, transparent);
  border-radius: 15px;
  background: color-mix(in srgb, var(--act) 7%, rgba(255, 255, 255, .44));
}
.lesson-detail-view .act-app[data-tipo="oracion"] .act-banco {
  padding: 16px;
  border-radius: 15px;
  background: rgba(255, 255, 255, .4);
}

/* Hablar: escenario central con el modelo como protagonista. */
.lesson-detail-view .act-app[data-tipo="habla"] .act-habla {
  display: grid;
  place-items: center;
  min-height: 240px;
}
.lesson-detail-view .act-app[data-tipo="habla"] .act-frase-modelo {
  max-width: 720px;
  font-size: clamp(1.55rem, 3vw, 2.25rem);
}
.lesson-detail-view .act-app[data-tipo="habla"] .act-audio.sonando {
  box-shadow: 0 0 0 8px color-mix(in srgb, var(--act) 12%, transparent), 0 0 0 16px color-mix(in srgb, var(--act) 7%, transparent);
}

/* Completar y traducir: foco limpio en una sola respuesta. */
.lesson-detail-view .act-app[data-tipo="completa"] .act-input,
.lesson-detail-view .act-app[data-tipo="traduce"] .act-input {
  min-height: 62px;
  font-size: 1.18rem;
  border-color: color-mix(in srgb, var(--act) 30%, rgba(120, 130, 155, .22));
}

/* Escritura: superficie de cuaderno, aun dentro del vidrio. */
.lesson-detail-view .act-app[data-tipo="escribe"] .act-escena {
  background:
    repeating-linear-gradient(180deg, transparent 0 31px, rgba(92, 112, 170, .09) 31px 32px),
    rgba(255, 255, 255, .64);
}

body.dark .lesson-detail-view .act-app[data-tipo="escucha"] .act-escena,
body.dark .lesson-detail-view .act-app[data-tipo="escribe"] .act-escena { background-color: rgba(12, 17, 30, .58); }

.lesson-detail-view .act-pie {
  min-height: 82px;
  padding: 16px 28px;
  background: rgba(255, 255, 255, .48);
  border-top-color: rgba(255, 255, 255, .68);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.lesson-detail-view .act-cta {
  min-width: 150px;
  border-radius: 12px;
}

@media (max-width: 900px) {
  .lesson-detail-view .act-cuerpo { grid-template-columns: 150px minmax(0, 1fr); padding-inline: 20px; }
  .lesson-detail-view .act-instruccion { min-height: 270px; padding: 18px; }
  .lesson-detail-view .act-escena { min-height: 270px; padding: 24px; }
}

@media (max-width: 700px) {
  .lesson-detail-view .act-app { min-height: 0; border-radius: 16px; }
  .lesson-detail-view .act-cuerpo { grid-template-columns: 1fr; gap: 12px; padding: 16px; }
  .lesson-detail-view .act-instruccion {
    min-height: 92px;
    align-items: flex-end;
    padding: 18px 18px 16px 116px;
  }
  .lesson-detail-view .act-instruccion::before { width: 58px; height: 58px; top: 14px; left: 20px; border-width: 8px; }
  .lesson-detail-view .act-instruccion::after { top: 76px; left: 22px; width: 48px; height: 4px; box-shadow: none; }
  .lesson-detail-view .act-escena { min-height: 300px; padding: 20px 16px; }
  .lesson-detail-view .act-app[data-tipo="significados"] .act-unir { gap: 8px; }
  .lesson-detail-view .act-app[data-tipo="significados"] .act-col { padding: 42px 7px 7px; }
  .lesson-detail-view .act-app[data-tipo="vf"] .act-opciones { grid-template-columns: 1fr; }
  .lesson-detail-view .act-app[data-tipo="vf"] .act-opcion { min-height: 72px; }
  .lesson-detail-view .act-pie { padding: 14px 16px; }
}

@media (prefers-reduced-motion: reduce) {
  .lesson-detail-view .act-escena { animation: none; }
  .lesson-detail-view .act-opcion:hover:not(:disabled),
  .lesson-detail-view .act-chip:hover:not(.ok),
  .lesson-detail-view .act-palabra:hover:not(:disabled) { transform: none; }
}