/**
 * Carousel Component Styles
 * Thumbnail gallery with fade transition
 */

/* ========================================
   Container
   ======================================== */
.carousel-container {
  width: 100%;
  max-width: 600px;
}

/* ========================================
   Main Carousel
   ======================================== */
.carousel-main {
  position: relative;
  width: 100%;
  aspect-ratio: 4/3;
  overflow: hidden;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

/* ========================================
   Slides
   ======================================== */
.carousel-slide {
  position: absolute;
  inset: 0; /* 简写: top/right/bottom/left: 0 */
  opacity: 0;
  transition: opacity 0.5s ease-in-out;
}

.carousel-slide.active {
  opacity: 1;
}

/* 合并重复的 img 样式 */
.carousel-slide img,
.thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ========================================
   Thumbnails
   ======================================== */
.carousel-thumbnails {
  display: flex;
  gap: 8px;
  margin-top: 15px;
  overflow-x: auto;
  padding: 5px 0;
  scrollbar-width: thin; /* Firefox */
}

/* 隐藏滚动条但保留功能 */
.carousel-thumbnails::-webkit-scrollbar {
  height: 4px;
}

.carousel-thumbnails::-webkit-scrollbar-thumb {
  background: rgba(0,0,0,0.2);
  border-radius: 2px;
}

.thumbnail {
  flex-shrink: 0;
  width: 80px;
  height: 60px;
  border-radius: 4px;
  overflow: hidden;
  cursor: pointer;
  border: 2px solid transparent;
  transition: border-color 0.3s ease, transform 0.2s ease;
}

/* 伪类状态 */
.thumbnail:hover {
  border-color: #ddd;
  transform: translateY(-2px);
}

.thumbnail:active {
  transform: scale(0.98);
}

.thumbnail.active {
  border-color: var(--color, #CB451B);
}

/* 焦点可访问性 */
.thumbnail:focus-visible {
  outline: 2px solid var(--color, #CB451B);
  outline-offset: 2px;
}

/* ========================================
   Media Queries - 响应式
   ======================================== */

/* 平板 */
@media (max-width: 1024px) {
  .carousel-container {
    max-width: 500px;
  }

  .thumbnail {
    width: 70px;
    height: 52px;
  }
}

/* 手机 */
@media (max-width: 768px) {
  .carousel-container {
    max-width: 100%;
  }

  .carousel-main {
    border-radius: 6px;
  }

  .carousel-thumbnails {
    gap: 6px;
    margin-top: 10px;
  }

  .thumbnail {
    width: 60px;
    height: 45px;
    border-radius: 3px;
  }
}

/* 小屏手机 */
@media (max-width: 480px) {
  .thumbnail {
    width: 50px;
    height: 38px;
  }

  .carousel-thumbnails {
    padding: 3px 0;
  }
}

/* ========================================
   Accessibility - 减少动画
   ======================================== */
@media (prefers-reduced-motion: reduce) {
  .carousel-slide,
  .thumbnail {
    transition: none;
  }
}