/* Shared Cover Flow view and its library view selector. */
.bookshelf-container .book-link {
  color: inherit;
  text-decoration: none;
}

.bookshelf-container a.text-list-book,
.bookshelf-container a.grid-cover-item {
  display: block;
}

.bookshelf-container .book-link:focus-visible {
  outline: 2px solid var(--color-text-primary);
  outline-offset: 4px;
}

.bookshelf-container .book-link:hover .text-list-book-title,
.bookshelf-container .book-link:focus-visible .text-list-book-title,
.bookshelf-container .book-link:hover .vertical-cover-title,
.bookshelf-container .book-link:focus-visible .vertical-cover-title {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.bookshelf-container .bookshelf-title-row {
  flex-direction: row;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.bookshelf-container .view-toggles {
  flex-shrink: 0;
  gap: var(--space-1);
}

.bookshelf-identity {
  flex: 1;
}

/* Match the homepage's header width, typography, and vertical rhythm. */
.bookshelf-page .bookshelf-main {
  padding-top: var(--site-header-top);
}

.bookshelf-page .bookshelf-header {
  max-width: var(--home-content-width);
  margin-bottom: var(--site-header-bottom);
}

.bookshelf-page .bookshelf-title-row {
  margin-bottom: 0;
}

.bookshelf-page .view-toggles {
  margin-block: -8px;
}

.bookshelf-page .text-list-container,
.bookshelf-page .vertical-covers-container {
  max-width: var(--home-content-width);
}

.bookshelf-home-link {
  display: block;
  flex-shrink: 0;
  border-radius: 50%;
}

.bookshelf-home-link img {
  display: block;
}

.bookshelf-home-link:focus-visible {
  outline: 2px solid var(--color-text-primary);
  outline-offset: 4px;
}

.bookshelf-container .view-toggle {
  min-width: 44px;
  min-height: 40px;
  padding: var(--space-1) 6px;
}

.bookshelf-container .library-view-icon {
  display: block;
  flex-shrink: 0;
  width: 24px;
  height: 24px;
}

.bookshelf-container .view-toggle:focus-visible,
.coverflow-title:focus-visible {
  outline: 2px solid var(--color-text-primary);
  outline-offset: 3px;
}

.coverflow-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-bottom: var(--space-10);
}

.coverflow-container[hidden] {
  display: none;
}

.coverflow-stage {
  --cover-width: clamp(200px, min(26vw, 26vh), 260px);
  --cover-height: calc(var(--cover-width) * 1.5);
  --cover-step: calc(var(--cover-width) * 0.4);
  --cover-spread: calc(var(--cover-width) * 0.78);
  position: relative;
  height: calc(var(--cover-height) * 1.24 + 96px);
  overflow: hidden;
  --edge-fade: clamp(24px, 12vw, 180px);
  -webkit-mask-image: linear-gradient(to right, transparent, #000 var(--edge-fade), #000 calc(100% - var(--edge-fade)), transparent);
  mask-image: linear-gradient(to right, transparent, #000 var(--edge-fade), #000 calc(100% - var(--edge-fade)), transparent);
  perspective: 1100px;
  perspective-origin: 50% 45%;
  touch-action: pan-y pinch-zoom;
  cursor: grab;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.coverflow-stage:focus-visible {
  outline: 2px solid var(--color-text-primary);
  outline-offset: -6px;
  border-radius: var(--border-radius-medium);
}

.coverflow-cover {
  position: absolute;
  top: 45%;
  left: 50%;
  width: var(--cover-width);
  height: var(--cover-height);
  padding: 0;
  border: 0;
  border-radius: var(--border-radius-small);
  color: var(--color-text-primary);
  background: var(--color-background-secondary);
  cursor: grab;
  transform: translate(-50%, -50%)
    translateX(calc(var(--offset) * var(--cover-step) + var(--direction) * var(--cover-spread) + var(--overscroll, 0px)))
    translateZ(calc(var(--distance) * -44px))
    rotateY(calc(var(--direction) * -52deg))
    scale(calc(1 + var(--focus, 0) * 0.24));
  filter: brightness(calc(1 - var(--distance) * 0.1));
  /* Fade out before a distant cover leaves the rendered window. */
  opacity: clamp(0, calc(2 - var(--distance) * 0.5), 1);
  transform-style: preserve-3d;
  transition:
    transform 420ms cubic-bezier(0.2, 0.8, 0.2, 1),
    filter 320ms ease,
    opacity 320ms ease;
}

.coverflow-stage.is-interacting .coverflow-cover {
  transition: none;
}

.coverflow-stage.is-dragging,
.coverflow-stage.is-dragging .coverflow-cover {
  cursor: grabbing;
}

/* A soft pool of shadow anchors the covers without adding a visible shelf. */
.coverflow-cover::after {
  content: "";
  position: absolute;
  right: 4%;
  bottom: -19px;
  left: 4%;
  height: 14px;
  border-radius: 50%;
  background: var(--color-shadow);
  filter: blur(10px);
  opacity: 0.7;
  pointer-events: none;
}

.coverflow-image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: inherit;
  box-shadow:
    0 1px 3px var(--color-shadow),
    0 8px 20px var(--color-shadow);
  pointer-events: none;
  -webkit-user-drag: none;
}

.coverflow-cover.is-active .coverflow-image {
  box-shadow:
    0 2px 5px var(--color-shadow),
    0 14px 28px var(--color-shadow);
}

.coverflow-cover:focus-visible {
  outline: 2px solid var(--color-text-primary);
  outline-offset: 6px;
}

.coverflow-details {
  max-width: 560px;
  min-height: 108px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  text-align: center;
}

.coverflow-details h2 {
  font-size: var(--font-size-large);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-compact);
  letter-spacing: -0.02em;
  overflow-wrap: anywhere;
}

.coverflow-title {
  color: var(--color-text-primary);
  text-decoration-line: underline;
  text-decoration-color: transparent;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  transition: text-decoration-color 180ms ease;
}

.coverflow-title:hover {
  text-decoration-color: currentColor;
}

.coverflow-author {
  margin-top: var(--space-1);
  color: var(--color-text-secondary);
  font-size: var(--font-size-medium);
  line-height: var(--line-height-compact);
}

.coverflow-meta {
  margin-top: var(--space-2);
  color: var(--color-text-secondary);
  font-size: var(--font-size-small);
}

.coverflow-status {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 600px) {
  .bookshelf-container .bookshelf-identity {
    flex-basis: 100%;
  }

  .bookshelf-page .view-toggles {
    margin-block: 0;
  }

  .coverflow-stage {
    --cover-width: 160px;
    --cover-height: 240px;
    --cover-step: 52px;
    --cover-spread: 128px;
    height: 392px;
  }

  .coverflow-details {
    min-height: 104px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .bookshelf-container .view-toggle,
  .bookshelf-container .view-toggle-indicator,
  .coverflow-cover,
  .coverflow-title {
    transition: none;
  }
}