/* ==========================================================================
   PORTAFOLIO ÉLITE — COMPARE SLIDER (Antes/Después) v2.1
   Digital Feedback — Lumen & Logic Design System

   Componente CSS para el slider interactivo de comparación Antes/Después.
   Consume los campos ACF: slider_ia_retoque → img_original + img_procesada.
   Requiere: compare-slider.js (Vanilla, ~25 líneas).

   Hereda design tokens de bento-grid.css (:root).
   Fallbacks inline garantizan funcionamiento independiente.
   ========================================================================== */

/* ==========================================================================
   1. CONTENEDOR PRINCIPAL
   ========================================================================== */

.df-compare {
  --df-split: 50%;

  position: relative;
  width: 100%;
  max-width: 960px;
  aspect-ratio: var(--df-compare-ratio, 3 / 4);
  margin: 0 auto;
  overflow: hidden;
  border-radius: var(--df-radius, clamp(8px, 0.6vw + 4px, 14px));
  border: 1px solid var(--df-border, rgba(255, 255, 255, 0.06));
  background-color: var(--df-surface, #111111);
  cursor: col-resize;
  touch-action: pan-y;
  user-select: none;
  -webkit-user-select: none;
  contain: layout style paint;
}

.df-compare:focus-within {
  outline: 2px solid var(--df-accent, #00FF00);
  outline-offset: 2px;
  box-shadow: var(--df-accent-glow, 0 0 24px rgba(0, 255, 0, 0.15));
}

/* ==========================================================================
   2. CAPAS DE IMAGEN — BLINDAJE ANTI-CROP
   ========================================================================== */

.df-compare__layer {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.df-compare__layer img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center center;
  pointer-events: none;
  -webkit-user-drag: none;
  user-select: none;
}

/* ── Capa "Before" (Original): visible a la IZQUIERDA del divisor ────── */
.df-compare__before {
  z-index: 2;
  clip-path: inset(0 calc(100% - var(--df-split)) 0 0);
  will-change: clip-path;
}

/* ── Capa "After" (Procesada): base completa, visible a la DERECHA ───── */
.df-compare__after {
  z-index: 1;
}

/* ==========================================================================
   3. ETIQUETAS (ORIGINAL / ÉLITE)
   ========================================================================== */

.df-compare__label {
  position: absolute;
  bottom: clamp(0.75rem, 2vw, 1.25rem);
  z-index: 5;
  font-family: var(--df-font-body, 'Inter', system-ui, sans-serif);
  font-size: var(--df-text-xs, clamp(11.5px, 0.75vw + 10px, 12.5px));
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  line-height: 1;
  padding: 0.4em 0.7em;
  border-radius: 4px;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.df-compare__before .df-compare__label {
  left: clamp(0.75rem, 2vw, 1.25rem);
  color: var(--df-text, #F0F0F0);
  background: rgba(10, 10, 10, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.df-compare__after .df-compare__label {
  right: clamp(0.75rem, 2vw, 1.25rem);
  color: var(--df-bg, #0A0A0A);
  background: var(--df-accent, #00FF00);
  border: 1px solid var(--df-accent, #00FF00);
}

/* ==========================================================================
   4. LÍNEA DIVISORIA + HANDLE (KNOB)
   ========================================================================== */

.df-compare__handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  /* Ancho completo + translateX: el arrastre va al COMPOSITOR (LEY 4).
     Antes era `left: var(--df-split)` + `will-change: left` → layout en cada
     frame. El centro del eje coincide con el divisor en los 3 casos
     (split 0% → -50%, 50% → 0, 100% → +50%). */
  width: 100%;
  pointer-events: none;
  transform: translateX(calc(var(--df-split) - 50%));
  will-change: transform;
}

/* Línea vertical */
.df-compare__handle::before,
.df-compare__handle::after {
  content: '';
  flex: 1;
  width: 2px;
  background: linear-gradient(
    to bottom,
    transparent,
    rgba(255, 255, 255, 0.6) 15%,
    rgba(255, 255, 255, 0.6) 85%,
    transparent
  );
  border-radius: 1px;
}

/* Knob central */
.df-compare__knob {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: clamp(36px, 4vw, 48px);
  height: clamp(36px, 4vw, 48px);
  border-radius: 50%;
  background: var(--df-bg, #0A0A0A);
  border: 2px solid rgba(255, 255, 255, 0.5);
  box-shadow:
    0 2px 8px rgba(0, 0, 0, 0.5),
    0 0 0 0 rgba(0, 255, 0, 0);
  flex-shrink: 0;
  transition:
    border-color 0.3s ease,
    box-shadow 0.4s ease,
    transform 0.3s ease;
}

.df-compare__knob svg {
  width: 60%;
  height: 60%;
  fill: none;
  stroke: rgba(255, 255, 255, 0.8);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: stroke 0.3s ease;
}

/* ── Hover / Active States ─────────────────────────────────────────────  */

.df-compare:hover .df-compare__knob {
  border-color: var(--df-accent, #00FF00);
  box-shadow:
    0 2px 12px rgba(0, 0, 0, 0.6),
    0 0 20px rgba(0, 255, 0, 0.2);
}

.df-compare:hover .df-compare__knob svg {
  stroke: var(--df-accent, #00FF00);
}

.df-compare--active .df-compare__knob {
  transform: scale(1.12);
  border-color: var(--df-accent, #00FF00);
  box-shadow:
    0 2px 16px rgba(0, 0, 0, 0.7),
    0 0 32px rgba(0, 255, 0, 0.3);
}

.df-compare--active .df-compare__handle::before,
.df-compare--active .df-compare__handle::after {
  background: linear-gradient(
    to bottom,
    transparent,
    rgba(0, 255, 0, 0.5) 15%,
    rgba(0, 255, 0, 0.5) 85%,
    transparent
  );
}

/* ==========================================================================
   5. INPUT RANGE (Invisible — Accesibilidad por teclado)
   ========================================================================== */

.df-compare__range {
  position: absolute;
  inset: 0;
  z-index: 20;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  opacity: 0;
  cursor: col-resize;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
}

.df-compare__range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 1px;
  height: 100%;
}

.df-compare__range::-moz-range-thumb {
  width: 1px;
  height: 100%;
  border: 0;
  background: transparent;
}

/* ==========================================================================
   6. HINT ANIMATION (primera visita — pulso en el knob)
   ========================================================================== */

.df-compare:not(.df-compare--interacted) .df-compare__knob {
  animation: df-compare-hint 2s ease-in-out 1s 2;
}

@keyframes df-compare-hint {
  0%, 100% { transform: translateX(0); }
  25%      { transform: translateX(-10px); }
  75%      { transform: translateX(10px); }
}

/* Detener hint tras primera interacción */
.df-compare--interacted .df-compare__knob {
  animation: none;
}

/* ==========================================================================
   7. ENCABEZADO DE SECCIÓN (opcional)
   ========================================================================== */

.df-compare-section {
  background-color: var(--df-bg, #0A0A0A);
  padding: var(--df-section-pad-y, clamp(3rem, 8vw, 7rem))
           var(--df-section-pad-x, clamp(1rem, 4vw, 5rem));
  font-family: var(--df-font-body, 'Inter', system-ui, sans-serif);
  color: var(--df-text, #F0F0F0);
  -webkit-font-smoothing: antialiased;
}

.df-compare-section__header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto clamp(2rem, 4vw, 3.5rem);
}

.df-compare-section__kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-size: var(--df-text-xs, clamp(11.5px, 0.75vw + 10px, 12.5px));
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--df-accent, #00FF00);
  margin-bottom: 0.8em;
}

.df-compare-section__kicker::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--df-accent, #00FF00);
  box-shadow: 0 0 12px rgba(0, 255, 0, 0.4);
}

.df-compare-section__title {
  font-family: var(--df-font-display, 'Outfit', system-ui, sans-serif);
  font-size: var(--df-text-2xl, clamp(24px, 2vw + 16px, 32px));
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin: 0 0 0.4em;
}

.df-compare-section__title em {
  font-style: normal;
  color: var(--df-accent, #00FF00);
}

.df-compare-section__subtitle {
  font-size: var(--df-text-base, clamp(15px, 1vw + 12px, 16.5px));
  color: var(--df-text-secondary, #888888);
  line-height: 1.6;
  margin: 0;
}

/* ==========================================================================
   8. RESPONSIVE
   ========================================================================== */

@media (max-width: 768px) {
  .df-compare {
    max-width: 100%;
    aspect-ratio: var(--df-compare-ratio-mobile, 3 / 4);
    border-radius: var(--df-radius, 10px);
  }

  .df-compare__label {
    font-size: clamp(10.5px, 2.5vw, 12px);
    padding: 0.3em 0.5em;
  }
}

@media (max-width: 480px) {
  .df-compare {
    border-radius: 8px;
    aspect-ratio: var(--df-compare-ratio-mobile, 2 / 3);
  }

  .df-compare__knob {
    width: 32px;
    height: 32px;
  }
}

/* ==========================================================================
   9. ACCESIBILIDAD
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  .df-compare:not(.df-compare--interacted) .df-compare__knob {
    animation: none;
  }

  .df-compare__before {
    will-change: auto;
  }

  .df-compare__knob,
  .df-compare__handle::before,
  .df-compare__handle::after,
  .df-compare__label {
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-contrast: more) {
  .df-compare {
    border-color: rgba(255, 255, 255, 0.25);
  }

  .df-compare__handle::before,
  .df-compare__handle::after {
    width: 3px;
    background: white;
  }

  .df-compare__knob {
    border-width: 3px;
    border-color: white;
  }
}