/* =========================================================
   Investigación 002 — Estilos de los interactivos
   ========================================================= */

.inter { position: relative; display: block; }

.inter__lienzo {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
}

.relato .inter__aviso {
  position: absolute;
  top: 14px;
  left: 50%;
  z-index: 2;
  width: min(26rem, calc(100% - 40px));
  margin: 0;
  transform: translateX(-50%);
  font-family: var(--sans);
  font-size: 13.5px;
  line-height: 1.45;
  text-align: center;
  color: var(--marfil);
  text-shadow: 0 1px 8px rgba(0, 0, 0, .8);
  pointer-events: none;
}

.inter__acciones {
  position: absolute;
  bottom: 14px;
  left: 0;
  right: 0;
  z-index: 2;
  display: flex;
  justify-content: center;
  gap: 10px;
  pointer-events: none;
}

.inter__boton {
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid rgba(205, 170, 114, .5);
  border-radius: 999px;
  background: rgba(5, 4, 3, .7);
  font-family: var(--sans);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--bronce-claro);
  cursor: pointer;
  pointer-events: auto;
}

.inter__boton[hidden] { display: none; }

/* ---------- 02 · Del cerro al imán ---------- */

.inter--cadena {
  display: grid;
  place-items: center;
  padding: 72px 0 80px;
}

.cadena {
  width: min(320px, calc(100% - 48px));
}

.relato .cadena__titulo,
.relato .cadena__fuente {
  margin: 0 0 18px;
  font-family: var(--sans);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--bronce);
}

.relato .cadena__fuente {
  margin: 18px 0 0;
  font-weight: 500;
  letter-spacing: .06em;
  text-transform: none;
  color: var(--marfil-tenue);
}

.cadena__etapas {
  margin: 0;
  padding: 0;
  list-style: none;
}

.cadena__etapa {
  display: grid;
  grid-template-columns: 74px 1fr 44px;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  transition: opacity .4s ease;
}

.cadena__nombre {
  font-family: var(--serif);
  font-size: 17px;
  color: var(--marfil);
}

.cadena__barra {
  position: relative;
  height: 10px;
  overflow: hidden;
  border-radius: 5px;
  background: rgba(238, 230, 212, .1);
}

.cadena__barra span {
  position: absolute;
  inset: 0 auto 0 0;
  width: calc(var(--valor) * 1%);
  border-radius: 5px;
  background: linear-gradient(90deg, var(--bronce), var(--bronce-claro));
}

.cadena__valor {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  text-align: right;
  color: var(--bronce-claro);
}

@media (prefers-reduced-motion: no-preference) {
  .js .cadena__barra span {
    width: 0;
    transition: width 1.4s cubic-bezier(.2, .7, .2, 1);
  }

  .js .cadena__etapa:nth-child(2) .cadena__barra span { transition-delay: .25s; }
  .js .cadena__etapa:nth-child(3) .cadena__barra span { transition-delay: .5s; }

  .js .is-llena .cadena__barra span { width: calc(var(--valor) * 1%); }
}

.cadena__etapa.is-resaltada .cadena__barra {
  box-shadow: 0 0 0 1px var(--bronce-claro), 0 0 14px rgba(205, 170, 114, .35);
}

.cadena__mina {
  display: grid;
  gap: 4px;
  margin: 6px 0 4px;
  padding: 10px 12px;
  border: 1px dashed rgba(238, 230, 212, .35);
  border-radius: 8px;
}

.cadena__mina[hidden] { display: none; }

.cadena__mina-marca {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  color: var(--marfil);
}

.cadena__flecha {
  font-family: var(--sans);
  font-size: 12px;
  color: var(--marfil-tenue);
}

/* ---------- 03 · Sigue el agua ---------- */

.inter--circuito {
  display: grid;
  align-content: center;
  gap: 8px;
  padding: 24px 0 20px;
}

.circuito {
  position: relative;
  width: min(340px, calc(100% - 24px));
  margin: 0 auto;
  aspect-ratio: 320 / 300;
}

.circuito__dibujo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.circuito__flujo {
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-dasharray: 6 6;
}

.circuito__flujo--agua { stroke: rgba(238, 230, 212, .55); }
.circuito__flujo--arcilla { stroke: #9A6440; }
.circuito__flujo--loop { stroke: var(--bronce-claro); }
.circuito__flujo--salida { stroke: rgba(205, 170, 114, .55); }

@media (prefers-reduced-motion: no-preference) {
  .circuito__flujo { animation: fluir 1.6s linear infinite; }
}

@keyframes fluir { to { stroke-dashoffset: -24; } }

.circuito__planta {
  fill: #1C140E;
  stroke: var(--bronce);
  stroke-width: 1.5;
}

.circuito__texto-planta {
  font-family: var(--sans);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: .14em;
  fill: var(--bronce-claro);
}

.circuito__nodo {
  position: absolute;
  left: var(--x);
  top: var(--y);
  min-height: 40px;
  max-width: 44%;
  padding: 6px 10px;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(205, 170, 114, .45);
  border-radius: 999px;
  background: rgba(10, 8, 6, .92);
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
  line-height: 1.2;
  color: var(--marfil);
  cursor: pointer;
}

.circuito__nodo--chico { max-width: 30%; font-size: 10.5px; }

.circuito__nodo.is-activo {
  border-color: var(--bronce-claro);
  background: var(--bronce);
  color: #120D09;
}

.circuito__panel {
  width: min(340px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 9.5em;
}

.relato .circuito__panel-titulo {
  margin: 0 0 8px;
  font-family: var(--serif);
  font-size: 19px;
  color: var(--marfil);
}

.relato .circuito__panel-declara,
.relato .circuito__panel-falta {
  margin: 0 0 8px;
  font-family: var(--sans);
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--marfil);
}

.relato .circuito__panel-falta { color: var(--marfil-tenue); }

.circuito__panel-declara span,
.circuito__panel-falta span {
  display: block;
  margin-bottom: 2px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--bronce);
}