/* ============================================================
   Comparador interactivo de 3 etapas:
   Diseño (render) → Simulación (FEA) → Fabricación (foto)
   Dos manijas arrastrables sobre tres capas 16:9 alineadas.
   Usa los tokens de CGK. Aislado en su propio archivo.
   ============================================================ */

.proceso-compare .compare { margin-top: clamp(14px, 2vw, 22px); }

/* Selector de harnero (Doble deck ⇄ Linatex) */
.compare__tabs {
  display: inline-flex;
  gap: 4px;
  margin-top: clamp(22px, 3vw, 34px);
  padding: 4px;
  border: 1px solid var(--hairline-hi);
  border-radius: 999px;
  background: var(--surface-1);
}
.compare__tab {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-tech);
  text-transform: uppercase;
  color: var(--text-md);
  background: transparent;
  border: 0;
  padding: 9px 18px;
  border-radius: 999px;
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out);
}
.compare__tab:hover { color: var(--text-hi); }
.compare__tab.is-active {
  background: var(--cat-yellow);
  color: var(--graphite-950);
  font-weight: 600;
}
.compare__tab:focus-visible { outline: 2px solid var(--paper); outline-offset: 2px; }
@media (max-width: 680px) {
  .compare__tabs { display: flex; width: 100%; }
  .compare__tab { flex: 1; padding: 9px 8px; font-size: 10px; text-align: center; }
}

.compare__viewport {
  --x1: 34%;                 /* separador Diseño | Simulación   */
  --x2: 67%;                 /* separador Simulación | Fabricación */
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--bg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--hairline-hi);
  touch-action: none;        /* el arrastre no dispara scroll */
  user-select: none;
}

.compare__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;         /* las 3 son 16:9 con el mismo encuadre → alinean */
  object-position: center;
  display: block;
  -webkit-user-drag: none;
  user-select: none;
  pointer-events: none;
}

.compare__layer { position: absolute; inset: 0; }
/* Orden (abajo→arriba): Fabricación (base) < Simulación < Diseño */
.compare__layer--sim { z-index: 2; clip-path: inset(0 calc(100% - var(--x2)) 0 0); }
.compare__layer--dis { z-index: 3; clip-path: inset(0 calc(100% - var(--x1)) 0 0); }
.compare__img--fab   { z-index: 1; }

/* ---- Etiquetas de etapa ---- */
.compare__tag {
  position: absolute;
  top: clamp(10px, 1.6vw, 18px);
  z-index: 5;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-tech);
  text-transform: uppercase;
  color: var(--text-hi);
  background: rgba(11,13,15,0.78);
  border: 1px solid var(--hairline-hi);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: opacity var(--dur-fast) var(--ease-out);
}
.compare__tag--dis { left: clamp(10px, 1.6vw, 18px); }
.compare__tag--sim { left: calc((var(--x1) + var(--x2)) / 2); transform: translateX(-50%); }
.compare__tag--fab { right: clamp(10px, 1.6vw, 18px); }
.compare__tag b { color: var(--cat-yellow); font-weight: 700; }

/* ---- Manijas arrastrables ---- */
.compare__handle {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 30px;                    /* zona de agarre amplia */
  transform: translateX(-50%);
  background: transparent;
  border: 0;
  padding: 0;
  margin: 0;
  z-index: 6;
  cursor: ew-resize;
  touch-action: none;
}
.compare__handle[data-handle="1"] { left: var(--x1); }
.compare__handle[data-handle="2"] { left: var(--x2); }

/* línea vertical */
.compare__handle::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  transform: translateX(-50%);
  background: var(--cat-yellow);
  box-shadow: 0 0 0 1px rgba(11,13,15,0.35);
}
/* botón circular con flechas */
.compare__grip {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 42px;
  height: 42px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: var(--cat-yellow);
  color: var(--graphite-950);
  display: grid;
  place-items: center;
  font-size: 16px;
  font-weight: 800;
  line-height: 1;
  box-shadow: 0 6px 18px rgba(0,0,0,0.55);
  transition: transform var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out);
}
.compare__handle:hover .compare__grip { transform: translate(-50%, -50%) scale(1.06); background: var(--cat-yellow-hi); }
.compare__handle:focus-visible { outline: none; }
.compare__handle:focus-visible .compare__grip { outline: 3px solid var(--graphite-950); outline-offset: 3px; box-shadow: 0 0 0 6px var(--paper); }

/* pista: pequeño hint que desaparece al interactuar */
.compare__hint {
  position: absolute;
  left: 50%;
  bottom: clamp(12px, 2vw, 20px);
  transform: translateX(-50%);
  z-index: 5;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--text-md);
  background: rgba(11,13,15,0.5);
  border: 1px solid var(--hairline);
  padding: 6px 12px;
  border-radius: 999px;
  pointer-events: none;
  transition: opacity var(--dur-mid) var(--ease-out);
}
.compare.is-touched .compare__hint { opacity: 0; }

@media (max-width: 680px) {
  .compare__grip { width: 36px; height: 36px; font-size: 14px; }
  .compare__tag { font-size: 10px; padding: 4px 7px; }
}

/* ---- Variante cuadrada: tríos 1:1 (p. ej. harnero cuaternario) ---- */
.compare--square { max-width: 760px; margin-inline: auto; }
.compare--square .compare__viewport { aspect-ratio: 1 / 1; }

/* ---- Loader al cambiar de máquina (pestañas): se muestra mientras
       precargan las 3 etapas para evitar el swap "a pedazos" ---- */
.compare__loader {
  position: absolute;
  inset: 0;
  z-index: 7;
  display: grid;
  place-items: center;
  background: rgba(11, 13, 15, 0.72);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-fast) var(--ease-out);
}
.compare.is-switching .compare__loader { opacity: 1; }
.compare__loader-box {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-tech);
  text-transform: uppercase;
  color: var(--text-hi);
}
.compare__spinner {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 3px solid rgba(255, 205, 17, 0.25);
  border-top-color: var(--cat-yellow);
  animation: compareSpin 0.8s linear infinite;
}
@keyframes compareSpin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .compare__spinner { animation-duration: 1.6s; }
}