/* 121 — Before / After
   Comparateur avant/après : deux visuels superposés, le calque « après » est
   clippé par inset(0 0 0 var(--ba-pos)) et suit la poignée en temps réel.
   La position --ba-pos (en %) est pilotée par anim.js. */

.before-after {
  --ba-pos: 50%;
  --ba-radius: 16px;
  --ba-handle: 40px;
  position: relative;
  width: min(320px, 100%);
  border-radius: var(--ba-radius);
}

.before-after__stage {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border-radius: inherit;
  border: 1px solid rgba(124, 140, 255, 0.16);
  background: var(--ml-surface, #151a24);
  box-shadow: 0 18px 40px -18px rgba(4, 7, 16, 0.8);
  cursor: col-resize;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

/* — Calques image — */
.before-after__pane {
  position: absolute;
  inset: 0;
}

.before-after__pane > svg,
.before-after__pane > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
}

/* Le calque « après » est au-dessus, révélé à droite du séparateur */
.before-after__pane--after {
  clip-path: inset(0 0 0 var(--ba-pos));
}

/* Pas de clavier : petit glissement animé (classe posée par anim.js,
   retirée dès qu'un drag pointeur reprend la main) */
.before-after.is-snap .before-after__pane--after {
  transition: clip-path 0.22s cubic-bezier(0.3, 0.7, 0.2, 1);
}

.before-after.is-snap .before-after__divider {
  transition: left 0.22s cubic-bezier(0.3, 0.7, 0.2, 1);
}

/* — Séparateur : ligne lumineuse + halo qui respire — */
.before-after__divider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--ba-pos);
  width: 0;
}

.before-after__divider::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: -1px;
  width: 2px;
  background: linear-gradient(
    180deg,
    rgba(124, 140, 255, 0.3),
    var(--ml-accent, #7c8cff) 32%,
    var(--ml-accent-2, #2dd4bf) 68%,
    rgba(45, 212, 191, 0.3)
  );
}

.before-after__divider::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: -4px;
  width: 8px;
  background: linear-gradient(180deg, transparent, rgba(124, 140, 255, 0.5), transparent);
  filter: blur(4px);
  animation: ba-breathe 3.2s ease-in-out infinite;
  pointer-events: none;
}

@keyframes ba-breathe {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

/* — Poignée (role="slider", focusable) — */
.before-after__handle {
  position: absolute;
  top: 50%;
  left: 0;
  width: var(--ba-handle, 40px);
  height: var(--ba-handle, 40px);
  display: grid;
  place-items: center;
  transform: translate(-50%, -50%);
  border-radius: 999px;
  color: var(--ml-accent, #7c8cff);
  background: rgba(13, 16, 23, 0.74);
  border: 1px solid rgba(124, 140, 255, 0.55);
  box-shadow:
    0 4px 18px rgba(4, 7, 16, 0.55),
    0 0 0 4px rgba(124, 140, 255, 0.12);
  cursor: grab;
  outline: none;
  transition:
    transform 0.25s cubic-bezier(0.3, 1.4, 0.4, 1),
    box-shadow 0.25s ease;
}

.before-after__handle:hover,
.before-after__handle:focus-visible {
  transform: translate(-50%, -50%) scale(1.08);
}

.before-after__handle:focus-visible {
  box-shadow:
    0 0 0 2px var(--ml-bg, #0d1017),
    0 0 0 4px var(--ml-accent, #7c8cff),
    0 4px 18px rgba(4, 7, 16, 0.55);
}

.before-after.is-dragging .before-after__stage {
  cursor: grabbing;
}

.before-after.is-dragging .before-after__handle {
  cursor: grabbing;
  transform: translate(-50%, -50%) scale(0.94);
}

.before-after__handle-icon {
  width: 18px;
  height: 9px;
}

/* — Labels Avant / Après (opacité pilotée par anim.js) — */
.before-after__label {
  position: absolute;
  top: 12px;
  padding: 4px 10px;
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ml-fg, #e8eaf2);
  background: rgba(13, 16, 23, 0.6);
  border: 1px solid rgba(232, 234, 242, 0.14);
  border-radius: 999px;
  pointer-events: none;
}

.before-after__label--before {
  left: 12px;
}

.before-after__label--after {
  right: 12px;
}

/* — Reduced motion : halo statique, déplacements clavier instantanés — */
@media (prefers-reduced-motion: reduce) {
  .before-after__divider::after {
    animation: none;
    opacity: 0.55;
  }

  .before-after.is-snap .before-after__pane--after,
  .before-after.is-snap .before-after__divider {
    transition: none;
  }

  .before-after__handle {
    transition: none;
  }
}