/**
 * Comparison Slider Component — Beresheet Dead Sea
 * Interactive before-and-after image comparison slider matching the shipped e-commerce feature.
 */

.comparison-component {
  margin: var(--space-10) 0;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: clamp(var(--space-6), 4vw, var(--space-8));
  box-shadow: var(--shadow-sm);
}

.comparison-header {
  text-align: center;
  margin-bottom: var(--space-6);
}

.comparison-title {
  font-family: var(--font-display);
  font-size: var(--text-h2);
  color: var(--color-ink-primary);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-2);
}

.comparison-subtitle {
  font-family: var(--font-sans);
  font-size: var(--text-body);
  color: var(--color-ink-secondary);
  line-height: var(--leading-normal);
  margin: 0 auto;
}

.comparison-slider-container {
  position: relative;
  width: 100%;
  aspect-ratio: 1024 / 558;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--color-border-subtle);
  box-shadow: var(--shadow-md);
  background-color: var(--color-surface-subtle);
  user-select: none;
  -webkit-user-select: none;
  touch-action: pan-y;
  cursor: ew-resize;
}

/* Base image (After) */
.comparison-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  pointer-events: none;
}

/* Clipped overlay image (Before) */
.comparison-before-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
  clip-path: inset(0 calc(100% - var(--position, 50%)) 0 0);
  -webkit-clip-path: inset(0 calc(100% - var(--position, 50%)) 0 0);
  will-change: clip-path;
}

/* Corner Labels matching Beresheet reference */
.comparison-label {
  position: absolute;
  top: var(--space-4);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: var(--weight-semibold);
  color: #FFFFFF;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.75), 0 2px 8px rgba(0, 0, 0, 0.4);
  pointer-events: none;
  z-index: 3;
  letter-spacing: 0.02em;
}

.comparison-label-before {
  left: var(--space-4);
}

.comparison-label-after {
  right: var(--space-4);
}

/* Vertical Divider Line */
.comparison-divider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--position, 50%);
  width: 2px;
  background-color: #FFFFFF;
  transform: translateX(-50%);
  pointer-events: none;
  z-index: 4;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.35);
  will-change: left;
}

/* Circular Center Handle with 3 Bars matching reference */
.comparison-handle {
  position: absolute;
  top: 50%;
  left: var(--position, 50%);
  transform: translate(-50%, -50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: #FFFFFF;
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.28), 0 1px 3px rgba(0, 0, 0, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
  pointer-events: none;
  will-change: left;
  transition: transform var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast) var(--ease-out);
}

.comparison-slider-container:hover .comparison-handle,
.comparison-slider-container.is-dragging .comparison-handle {
  transform: translate(-50%, -50%) scale(1.06);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.32);
}

.comparison-handle-icon {
  width: 14px;
  height: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.comparison-handle-bar {
  width: 2px;
  height: 12px;
  background-color: #6E675F;
  border-radius: 1px;
}

/* Native Accessible Range Input */
.comparison-range-input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  margin: 0;
  padding: 0;
  cursor: ew-resize;
  z-index: 6;
  -webkit-appearance: none;
  appearance: none;
}

/* Focus Indicator for Keyboard Accessibility */
.comparison-slider-container:has(.comparison-range-input:focus-visible) {
  outline: 2px solid var(--color-accent-cobalt);
  outline-offset: 3px;
}

.comparison-range-input:focus-visible ~ .comparison-handle {
  box-shadow: 0 0 0 3px rgba(203, 185, 164, 0.55), 0 2px 10px rgba(0, 0, 0, 0.28);
}

/* Factual, neutral figure caption */
.comparison-caption {
  margin-top: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-mono-tag);
  color: var(--color-ink-muted);
  line-height: var(--leading-normal);
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
}

.comparison-caption-marker {
  color: var(--color-accent-ink);
  font-weight: var(--weight-bold);
  flex-shrink: 0;
}

/* Responsive Adaptations */
@media (max-width: 640px) {
  .comparison-handle {
    width: 36px;
    height: 36px;
  }
  
  .comparison-handle-bar {
    height: 10px;
  }

  .comparison-label {
    font-size: 0.8125rem;
    top: var(--space-3);
  }
  
  .comparison-label-before {
    left: var(--space-3);
  }
  
  .comparison-label-after {
    right: var(--space-3);
  }
}

/* Respect Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .comparison-before-overlay,
  .comparison-divider,
  .comparison-handle {
    transition: none !important;
    animation: none !important;
  }
}