/* 书架首页 */
.mytheme-kb-shelf-wrap {
  --kb-primary: #f03030;
}

.mytheme-kb-shelf-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.mytheme-kb-search-wrap {
  position: relative;
  min-width: 240px;
  flex: 1;
  max-width: 360px;
}

.mytheme-kb-search-input {
  width: 100%;
  border: 1px solid #e5e7eb;
  border-radius: 999px;
  padding: 0.65rem 1rem;
  font-size: 14px;
  background: #fff;
}

.mytheme-kb-search-results {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border: 1px solid #eee;
  border-radius: 16px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
  z-index: 30;
  max-height: 360px;
  overflow: auto;
  padding: 0.5rem;
}

.mytheme-kb-search-results a {
  display: block;
  padding: 0.65rem 0.75rem;
  border-radius: 12px;
  color: #374151;
  text-decoration: none;
}

.mytheme-kb-search-results a:hover {
  background: #f9fafb;
}

.mytheme-kb-search-results mark {
  background: rgba(240, 48, 48, 0.15);
  color: var(--kb-primary);
}

.mytheme-kb-top-strip {
  margin-bottom: 1.5rem;
  overflow: hidden;
}

.mytheme-kb-top-scroll {
  display: flex;
  gap: 1.25rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
}

.mytheme-kb-shelf-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.mytheme-kb-shelf-tabs a {
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  border: 1px solid #e5e7eb;
  color: #6b7280;
  text-decoration: none;
  font-size: 13px;
}

.mytheme-kb-shelf-tabs a.is-active {
  border-color: var(--kb-primary);
  color: var(--kb-primary);
  font-weight: 600;
}

.mytheme-kb-book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 2rem 1.5rem;
  padding: 0.5rem 0 2rem;
}

.mytheme-kb-empty {
  grid-column: 1 / -1;
  text-align: center;
  color: #9ca3af;
  padding: 3rem 1rem;
}

/* 立体书本 */
.wpbd-book {
  display: flex;
  justify-content: center;
  cursor: pointer;
}

.wpbd-book-inner {
  --width: 170px;
  --height: 210px;
  --radius: 20px;
  position: relative;
  width: var(--width);
  height: var(--height);
  transform: perspective(120px) rotate(-2deg) rotateX(2deg);
  transition: transform 0.4s;
}

.wpbd-page {
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.wpbd-page-2 {
  transform: translateX(4px) translateY(-2px);
}

.wpbd-page-3 {
  transform: translateX(8px) translateY(-4px);
}

.wpbd-page-1 {
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}

.wpbd-face {
  position: absolute;
  inset: 0;
  transform-origin: left center;
  transition: transform cubic-bezier(0, 1.6, 0.6, 1) 0.75s;
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
  z-index: 2;
}

.wpbd-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: opacity 0.35s;
}

.wpbd-title {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 0.75rem;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.65));
  transition: opacity 0.35s;
}

.wpbd-read-link {
  opacity: 0;
  transform: translateX(-30px);
  transition: 0.5s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1rem;
  border-radius: 999px;
  background: var(--kb-primary);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 8px 20px rgba(240, 48, 48, 0.25);
}

.wpbd-book:hover .wpbd-face,
.wpbd-book.is-open .wpbd-face,
.wpbd-book:focus-within .wpbd-face {
  transform: perspective(550px) rotateY(-105deg);
}

.wpbd-book:hover .wpbd-cover,
.wpbd-book:hover .wpbd-title,
.wpbd-book.is-open .wpbd-cover,
.wpbd-book.is-open .wpbd-title,
.wpbd-book:focus-within .wpbd-cover,
.wpbd-book:focus-within .wpbd-title {
  opacity: 0;
}

.wpbd-book:hover .wpbd-read-link,
.wpbd-book.is-open .wpbd-read-link,
.wpbd-book:focus-within .wpbd-read-link {
  opacity: 1;
  transform: translateX(0);
}

@media (max-width: 767px) {
  .wpbd-book-inner {
    transform: none;
  }
}