/**
 * NullProof Screenshot Carousel
 * Base styles with CSS custom properties for theming
 */

.carousel {
  /* Colours - overridable via theme */
  --carousel-accent: #1a1a1a;
  --carousel-bg: transparent;
  --carousel-arrow-color: #1a1a1a;
  --carousel-arrow-bg: rgba(255, 255, 255, 0.9);
  --carousel-counter-color: rgba(0, 0, 0, 0.6);
  --carousel-caption-color: #333;
  --carousel-dot-color: rgba(0, 0, 0, 0.2);
  --carousel-dot-active: rgba(0, 0, 0, 0.8);
  --carousel-dot-hover: rgba(0, 0, 0, 0.4);

  /* Sizing - overridable via theme */
  --carousel-max-width: 1200px;
  --carousel-border-radius: 8px;
  --carousel-arrow-size: 48px;
  --carousel-dot-size: 8px;
  --carousel-aspect-ratio: 16 / 9;

  /* Spacing */
  --carousel-padding: 0 1rem;
  --carousel-gap: 1rem;

  /* Timing */
  --carousel-transition: 500ms;

  position: relative;
  max-width: var(--carousel-max-width);
  margin: 0 auto;
  padding: var(--carousel-padding);
  background: var(--carousel-bg);
}

/* Header */
.carousel__header {
  text-align: center;
  margin-bottom: var(--carousel-gap);
}

.carousel__title {
  font-size: 1.5rem;
  font-weight: 500;
  margin: 0 0 0.5rem;
  color: var(--carousel-accent);
}

.carousel__description {
  font-size: 1rem;
  color: var(--carousel-counter-color);
  margin: 0;
}

/* Viewport - clips overflow */
.carousel__viewport {
  position: relative;
  overflow: hidden;
  border-radius: var(--carousel-border-radius);
}

/* Track - holds all slides, transforms for navigation */
.carousel__track {
  display: flex;
  transition: transform var(--carousel-transition) cubic-bezier(0.25, 0.1, 0.25, 1);
  will-change: transform;
}

.carousel__track--dragging {
  transition: none;
  cursor: grabbing;
}

/* Individual slide */
.carousel__slide {
  flex: 0 0 100%;
  min-width: 0;
  position: relative;
}

.carousel__slide img {
  width: 100%;
  height: auto;
  aspect-ratio: var(--carousel-aspect-ratio);
  object-fit: var(--carousel-object-fit, contain);
  display: block;
  background: #f5f5f5;
}

.carousel__slide--loading img {
  opacity: 0;
}

/* Loading placeholder */
.carousel__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f5f5f5;
  border-radius: var(--carousel-border-radius);
}

.carousel__placeholder::after {
  content: '';
  width: 32px;
  height: 32px;
  border: 3px solid rgba(0, 0, 0, 0.1);
  border-top-color: var(--carousel-accent);
  border-radius: 50%;
  animation: carousel-spin 0.8s linear infinite;
}

@keyframes carousel-spin {
  to { transform: rotate(360deg); }
}

/* Caption */
.carousel__caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1rem;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
  color: #fff;
  font-size: 0.875rem;
  text-align: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.carousel__slide--active .carousel__caption,
.carousel:hover .carousel__caption {
  opacity: 1;
}

/* Navigation arrows */
.carousel__arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: var(--carousel-arrow-size);
  height: var(--carousel-arrow-size);
  border-radius: 50%;
  background: var(--carousel-arrow-bg);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, opacity 0.2s, transform 0.2s;
  z-index: 10;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.carousel__arrow:hover {
  background: rgba(255, 255, 255, 1);
  transform: translateY(-50%) scale(1.05);
}

.carousel__arrow:focus-visible {
  outline: 2px solid var(--carousel-accent);
  outline-offset: 2px;
}

.carousel__arrow:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  transform: translateY(-50%);
}

.carousel__arrow:disabled:hover {
  background: var(--carousel-arrow-bg);
}

.carousel__arrow--prev {
  left: 1rem;
}

.carousel__arrow--next {
  right: 1rem;
}

.carousel__arrow svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: var(--carousel-arrow-color);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Controls container */
.carousel__controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: var(--carousel-gap) 0;
}

/* Dot indicators */
.carousel__dots {
  display: flex;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
  max-width: 100%;
}

.carousel__dot {
  width: var(--carousel-dot-size);
  height: var(--carousel-dot-size);
  border-radius: 50%;
  background: var(--carousel-dot-color);
  border: none;
  padding: 0;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}

.carousel__dot:hover {
  background: var(--carousel-dot-hover);
}

.carousel__dot:focus-visible {
  outline: 2px solid var(--carousel-accent);
  outline-offset: 2px;
}

.carousel__dot--active {
  background: var(--carousel-dot-active);
  transform: scale(1.25);
}

/* Progress bar (alternative to dots) */
.carousel__progress {
  width: 100%;
  max-width: 300px;
  height: 3px;
  background: rgba(0, 0, 0, 0.1);
  border-radius: 2px;
  overflow: hidden;
}

.carousel__progress-bar {
  height: 100%;
  background: var(--carousel-accent);
  transition: width 0.3s ease-out;
  border-radius: 2px;
}

/* Counter */
.carousel__counter {
  font-family: inherit;
  font-size: 0.875rem;
  color: var(--carousel-counter-color);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.05em;
}

/* Restart button */
.carousel__restart {
  display: none;
  padding: 0.5rem 1rem;
  background: transparent;
  border: 1px solid var(--carousel-accent);
  border-radius: 4px;
  color: var(--carousel-accent);
  font-size: 0.875rem;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.carousel__restart:hover {
  background: var(--carousel-accent);
  color: #fff;
}

.carousel--ended .carousel__restart {
  display: inline-block;
}

/* Play/pause indicator */
.carousel__status {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.25rem 0.5rem;
  background: rgba(0, 0, 0, 0.5);
  color: #fff;
  font-size: 0.75rem;
  border-radius: 4px;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}

.carousel:hover .carousel__status--paused {
  opacity: 1;
}

/* Focus state for the carousel container */
.carousel:focus {
  outline: none;
}

.carousel:focus-visible {
  outline: 2px solid var(--carousel-accent);
  outline-offset: 4px;
}

/* Responsive styles */
@media (max-width: 768px) {
  .carousel {
    --carousel-arrow-size: 40px;
    --carousel-padding: 0;
    --carousel-border-radius: 0;
  }

  .carousel__arrow--prev {
    left: 0.5rem;
  }

  .carousel__arrow--next {
    right: 0.5rem;
  }

  .carousel__slide img {
    border-radius: 0;
  }

  .carousel__dots {
    gap: 4px;
  }

  .carousel__dot {
    width: 6px;
    height: 6px;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .carousel__track {
    transition: none;
  }

  .carousel__dot,
  .carousel__arrow,
  .carousel__caption,
  .carousel__progress-bar {
    transition: none;
  }

  .carousel__placeholder::after {
    animation: none;
  }
}

/* Hide elements based on settings */
.carousel--no-dots .carousel__dots {
  display: none;
}

.carousel--no-arrows .carousel__arrow {
  display: none;
}

.carousel--no-counter .carousel__counter {
  display: none;
}

.carousel--no-captions .carousel__caption {
  display: none;
}

.carousel--with-progress .carousel__dots {
  display: none;
}

.carousel--with-progress .carousel__progress {
  display: block;
}

.carousel__progress {
  display: none;
}