.readers-subnav {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.65rem 2rem 0.65rem 0.75rem;
  background: var(--readers-red);
  color: var(--white);
}

.readers-subnav-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.readers-back {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  color: var(--white);
  text-decoration: none;
  border-radius: 4px;
}

.readers-back:hover {
  background: rgba(255, 255, 255, 0.12);
}

.readers-back svg {
  width: 1.25rem;
  height: 1.25rem;
}

.readers-subnav-title {
  font-size: 1.15rem;
  font-weight: 600;
}

.readers-main {
  padding: 1.25rem 0 3rem;
  background: var(--gray-bg);
}

.readers-level {
  margin-bottom: 1.5rem;
}

.readers-level-label {
  display: inline-block;
  margin: 0 0 0.75rem 1.5rem;
  padding: 0.35rem 0.85rem;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--white);
  border-radius: 2px;
}

.readers-row {
  position: relative;
}

.readers-row-scroll {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  padding: 0 3.25rem 0.5rem 1.5rem;
  overflow-x: auto;
  scroll-behavior: auto;
  scrollbar-width: none;
}

.readers-row-scroll::-webkit-scrollbar {
  display: none;
}

.readers-row-nav {
  position: absolute;
  top: 50%;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.35rem;
  height: 2.35rem;
  border: none;
  border-radius: 50%;
  background: var(--white);
  color: var(--navy);
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.18);
  cursor: pointer;
  transform: translateY(-50%);
}

.readers-row-nav:hover {
  background: #f7f7f7;
}

.readers-row-nav[hidden] {
  display: none;
}

.readers-row-nav:disabled {
  opacity: 0.35;
  cursor: default;
}

.readers-row-nav--prev {
  left: 0.35rem;
}

.readers-row-nav--next {
  right: 0.35rem;
}

.readers-row-nav svg {
  width: 1.1rem;
  height: 1.1rem;
}

.readers-book {
  position: relative;
  flex: 0 0 11rem;
  width: 11rem;
  align-self: flex-start;
  display: flex;
  flex-direction: column;
  border: none;
  padding: 0;
  background: #d8d8d8;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.12);
  cursor: pointer;
  text-align: left;
  overflow: hidden;
}

.readers-book--scaled {
  flex: 0 0 calc(11rem * var(--readers-book-scale));
  width: calc(11rem * var(--readers-book-scale));
}

.readers-book-complete {
  position: absolute;
  top: 0.3rem;
  right: 0.3rem;
  z-index: 4;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 50%;
  background: #3a9d45;
  color: var(--white);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.22);
  pointer-events: none;
}

.readers-book-complete svg {
  width: 0.8rem;
  height: 0.8rem;
}

.readers-book-cover-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: var(--readers-cover-aspect, 2 / 3);
  flex: 0 0 auto;
  overflow: hidden;
  background: transparent;
}

.readers-book-cover-wrap .readers-book-cover-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: var(--readers-cover-position, center top);
}

.readers-book-cover--placeholder {
  position: relative;
}

.readers-book-cover-title {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem;
  text-align: center;
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1.25;
  color: rgba(255, 255, 255, 0.92);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.35);
  pointer-events: none;
}

.readers-book-cover--placeholder::after {
  content: attr(data-initial);
  position: absolute;
  inset: 0;
  z-index: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.35);
  pointer-events: none;
}

.readers-book-cover--image::after {
  content: none;
  display: none;
}

.readers-book-progress {
  height: 0.35rem;
  background: #d8d8d8;
}

.readers-book-progress-fill {
  height: 100%;
  width: 0;
  transition: width 0.2s ease;
}

.readers-row-meta {
  padding: 0.35rem 1.5rem 0;
  text-align: right;
  font-size: 0.72rem;
  color: var(--gray-text);
}

@media (max-width: 900px) {
  .readers-subnav {
    padding: 0.65rem 1rem 0.65rem 0.75rem;
  }

  .readers-level-label {
    margin-left: 1rem;
  }

  .readers-row-scroll {
    padding-left: 1rem;
    padding-right: 2.75rem;
    gap: 0.85rem;
  }

  .readers-book {
    flex-basis: 8.75rem;
    width: 8.75rem;
  }

  .readers-book--scaled {
    flex-basis: calc(8.75rem * var(--readers-book-scale));
    width: calc(8.75rem * var(--readers-book-scale));
  }

}

.reader-book-page--modal-open,
.reader-book-page--reading {
  overflow: hidden;
}

.reader-book-main {
  min-height: calc(100vh - 7.5rem);
}

.reader-book-backdrop {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: rgba(0, 0, 0, 0.55);
}

.reader-book-backdrop[hidden] {
  display: none;
}

.reader-book-modal {
  position: relative;
  width: min(22rem, 100%);
  background: var(--white);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

.reader-book-close {
  position: absolute;
  top: -0.65rem;
  right: -0.65rem;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border: none;
  border-radius: 50%;
  background: var(--navy);
  color: var(--white);
  cursor: pointer;
}

.reader-book-close svg {
  width: 1rem;
  height: 1rem;
}

.reader-book-cover-panel {
  display: flex;
  flex-direction: column;
}

.reader-book-modal--3d {
  width: min(24rem, 100%);
  background: #f4f4f4;
}

.reader-book-modal--3d .reader-book-title {
  margin: 0;
  padding: 0.75rem 1rem 0;
  font-size: 1rem;
  font-weight: 700;
  text-align: center;
  color: var(--navy);
}

.reader-book-3d {
  display: flex;
  justify-content: center;
  padding: 1.75rem 1.25rem 1rem;
  background: linear-gradient(180deg, #ececec 0%, #f8f8f8 100%);
}

.reader-book-3d-stage {
  position: relative;
  display: flex;
  align-items: stretch;
  transform: rotateY(-24deg) rotateX(2deg);
  transform-style: preserve-3d;
  filter: drop-shadow(0 14px 18px rgba(0, 0, 0, 0.28));
}

.reader-book-3d-spine {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.35rem;
  background: linear-gradient(90deg, #4a3018 0%, #6d4a24 45%, #3a2410 100%);
  border: 1px solid rgba(0, 0, 0, 0.35);
  border-right: none;
}

.reader-book-3d-spine-title {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  transform: rotate(180deg);
  padding: 0.5rem 0;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1.2;
  color: #f5e6c8;
  text-align: center;
}

.reader-book-3d-face {
  position: relative;
  width: min(14rem, 58vw);
  background: #111;
  border: 1px solid rgba(0, 0, 0, 0.35);
}

.reader-book-3d-cover-img {
  display: block;
  width: 100%;
  height: auto;
  vertical-align: top;
}

.reader-book-3d-edge {
  position: absolute;
  top: 0.35rem;
  right: -0.45rem;
  width: 0.45rem;
  height: calc(100% - 0.7rem);
  background: linear-gradient(180deg, #d8d8d8 0%, #a8a8a8 100%);
  transform: translateZ(-1px);
  border: 1px solid rgba(0, 0, 0, 0.2);
}

.reader-book-cover-img {
  display: block;
  width: 100%;
  height: auto;
  vertical-align: top;
}

.readers-book--3d .readers-book-cover-3d {
  position: relative;
  width: 100%;
  height: 16.5rem;
  flex: 0 0 16.5rem;
  overflow: hidden;
  background: transparent;
}

.readers-book-cover-3d {
  display: flex;
  align-items: stretch;
  perspective: 500px;
}

.readers-book-cover-3d-spine {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 0.95rem;
  background: linear-gradient(90deg, #4a3018 0%, #6d4a24 55%, #3a2410 100%);
}

.readers-book-cover-3d-spine span {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  transform: rotate(180deg);
  font-size: 0.34rem;
  font-weight: 700;
  line-height: 1.1;
  color: #f5e6c8;
  letter-spacing: 0.02em;
}

.readers-book-cover-3d-face {
  position: relative;
  flex: 1 1 auto;
  overflow: hidden;
  background-size: cover;
  background-position: center top;
  transform: rotateY(-10deg);
  transform-origin: left center;
  box-shadow: 2px 2px 6px rgba(0, 0, 0, 0.18);
}

.readers-book-cover-3d-face .readers-book-cover-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.readers-book-cover-3d-face::after {
  content: attr(data-initial);
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.35);
}

.readers-book-cover--image.readers-book-cover-3d-face::after,
.readers-book-cover-3d-face:has(.readers-book-cover-img)::after {
  display: none;
}

.readers-book-cover--image {
  background-color: transparent;
}

.readers-book--contain-cover .readers-book-cover-wrap .readers-book-cover-img,
.readers-book--contain-cover .readers-book-cover-3d-face .readers-book-cover-img {
  object-fit: contain;
  object-position: center;
}

.readers-book-cover--placeholder.readers-book-cover--image::after {
  display: none;
}

.reader-book-actions {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0;
}

.reader-book-action {
  border: none;
  padding: 0.85rem 1rem;
  background: var(--navy);
  color: var(--white);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

.reader-book-listen-status {
  margin: 0.65rem 0 0;
  color: rgba(255, 255, 255, 0.92);
  font-size: 0.8rem;
  font-weight: 600;
  text-align: center;
}

.reader-book-listen-status[hidden] {
  display: none;
}

.reader-book-modal--3d .reader-book-listen-status {
  color: var(--navy);
}

.reader-book-action:hover {
  background: #11114f;
}

.reader-book-action--solo {
  width: 100%;
  margin-top: 1rem;
}

.reader-book-about-panel {
  padding: 1.5rem 1.35rem 1.35rem;
}

.reader-book-about-panel[hidden] {
  display: none;
}

.reader-book-about-heading {
  margin: 0 0 0.25rem;
  font-size: 1.15rem;
  color: var(--navy);
}

.reader-book-about-author {
  margin: 0 0 0.85rem;
  font-size: 0.9rem;
  color: var(--gray-text);
}

.reader-book-about-text {
  margin: 0 0 0.85rem;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--navy);
}

.reader-book-about-level {
  margin: 0;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--navy);
}

.reader-ebook-viewer {
  position: fixed;
  inset: 0;
  z-index: 130;
  display: flex;
  flex-direction: column;
  background: #2a2a2a;
}

.reader-ebook-viewer[hidden] {
  display: none;
}

.reader-ebook-toolbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.55rem 0.85rem;
  background: var(--navy);
  color: var(--white);
}

.reader-ebook-back,
.reader-ebook-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.15rem;
  height: 2.15rem;
  border: none;
  border-radius: 4px;
  background: transparent;
  color: var(--white);
  cursor: pointer;
}

.reader-ebook-back:hover,
.reader-ebook-close:hover {
  background: rgba(255, 255, 255, 0.12);
}

.reader-ebook-back svg,
.reader-ebook-close svg {
  width: 1.15rem;
  height: 1.15rem;
}

.reader-ebook-title {
  flex: 1;
  margin: 0;
  font-size: 0.95rem;
  font-weight: 600;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.reader-ebook-frame {
  flex: 1;
  width: 100%;
  border: none;
  background: #525252;
}

@media (max-width: 640px) {
  .reader-book-backdrop {
    padding: 1rem;
  }

  .reader-book-modal {
    width: min(18rem, 100%);
  }

  .reader-book-action {
    padding: 0.75rem 0.65rem;
    font-size: 0.92rem;
  }
}