/* Scoped styles for the data-driven reading-topic modules.
   Kept separate so the protected site-wide stylesheet remains unchanged. */

.reading-topic-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.reading-topic-card {
  display: grid;
  grid-template-columns: minmax(180px, 0.72fr) minmax(0, 1.28fr);
  min-width: 0;
  min-height: 250px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: 0 8px 24px rgba(25, 29, 28, 0.06);
  transition: border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.reading-topic-card:hover,
.reading-topic-card:focus-visible {
  border-color: color-mix(in srgb, var(--teal) 48%, var(--line));
  box-shadow: 0 14px 34px rgba(25, 29, 28, 0.11);
  transform: translateY(-2px);
}

.reading-topic-card:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--teal) 30%, transparent);
  outline-offset: 3px;
}

.reading-topic-covers {
  position: relative;
  display: block;
  min-width: 0;
  min-height: 250px;
  overflow: hidden;
  border-right: 1px solid var(--line);
  background:
    radial-gradient(circle at 24% 24%, color-mix(in srgb, var(--gold) 18%, transparent), transparent 34%),
    linear-gradient(145deg, var(--surface-warm), color-mix(in srgb, var(--teal) 8%, var(--surface)));
}

.reading-topic-covers::after {
  position: absolute;
  inset: auto 10% 12px;
  height: 18px;
  border-radius: 50%;
  background: rgba(20, 31, 29, 0.12);
  filter: blur(12px);
  content: "";
}

.reading-topic-covers img,
.topic-detail-cover-stack img {
  position: absolute;
  z-index: 1;
  width: 43%;
  max-width: 108px;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: 1px solid rgba(255, 255, 255, 0.68);
  border-radius: 7px;
  background: var(--surface-warm);
  box-shadow: 0 10px 22px rgba(19, 27, 25, 0.22);
}

/* Keep the four-card fan centred inside its own panel. The previous
   43% width + 68% left offset pushed the fourth cover past the divider. */
.reading-topic-covers img {
  width: 39%;
  transform-origin: 50% 92%;
}

.reading-topic-covers .topic-cover-1,
.topic-detail-cover-stack .topic-cover-1 {
  bottom: 20px;
  left: 4%;
  transform: rotate(-7deg);
}

.reading-topic-covers .topic-cover-1 {
  left: 4%;
}

.reading-topic-covers .topic-cover-2,
.topic-detail-cover-stack .topic-cover-2 {
  top: 34px;
  left: 25%;
  z-index: 2;
  transform: rotate(-2deg);
}

.reading-topic-covers .topic-cover-2 {
  left: 23%;
}

.reading-topic-covers .topic-cover-3,
.topic-detail-cover-stack .topic-cover-3 {
  bottom: 18px;
  left: 47%;
  z-index: 3;
  transform: rotate(3deg);
}

.reading-topic-covers .topic-cover-3 {
  left: 42%;
}

.reading-topic-covers .topic-cover-4,
.topic-detail-cover-stack .topic-cover-4 {
  top: 26px;
  left: 68%;
  z-index: 4;
  transform: rotate(7deg);
}

.reading-topic-covers .topic-cover-4 {
  left: 57%;
}

.reading-topic-copy {
  display: flex;
  min-width: 0;
  padding: 24px 24px 22px;
  flex-direction: column;
  align-items: flex-start;
}

.reading-topic-copy small {
  margin-bottom: 9px;
  color: var(--terra);
  font-size: 0.78rem;
  font-weight: 700;
}

.reading-topic-copy strong {
  font-family: var(--font-serif);
  font-size: clamp(1.16rem, 1.45vw, 1.42rem);
  line-height: 1.32;
}

.reading-topic-copy > span {
  display: -webkit-box;
  margin-top: 10px;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.7;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.reading-topic-copy b {
  margin-top: auto;
  padding-top: 16px;
  color: var(--teal);
  font-size: 0.9rem;
}

.reading-topic-copy b i {
  display: inline-block;
  font-style: normal;
  transition: transform 160ms ease;
}

.reading-topic-card:hover .reading-topic-copy b i,
.reading-topic-card:focus-visible .reading-topic-copy b i {
  transform: translateX(4px);
}

.reading-topic-more {
  display: flex;
  justify-content: center;
  margin-top: 24px;
}

.topic-index-hero .page-title > p {
  max-width: 52rem;
}

.topic-detail-hero {
  overflow: hidden;
}

.topic-detail-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  gap: clamp(28px, 6vw, 84px);
  align-items: center;
}

.topic-detail-hero h1 {
  max-width: 15ch;
  margin: 10px 0 14px;
  font-size: clamp(2.45rem, 5vw, 4.7rem);
  line-height: 1.04;
}

.topic-detail-hero-grid > div:first-child > p {
  max-width: 46rem;
  color: var(--muted);
  font-size: 1.02rem;
}

.topic-detail-cover-stack {
  position: relative;
  min-height: 320px;
}

.topic-detail-cover-stack img {
  width: 39%;
  max-width: 132px;
}

.topic-detail-facts {
  display: flex;
  margin: 22px 0;
  flex-wrap: wrap;
  gap: 10px;
}

.topic-detail-facts span,
.topic-book-meta span {
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-size: 0.82rem;
}

.topic-detail-facts strong {
  color: var(--ink);
}

.topic-detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(245px, 0.3fr);
  gap: 34px;
  align-items: start;
}

.topic-book-list {
  display: grid;
  gap: 14px;
}

.topic-book-card {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: 22px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}

.topic-book-cover {
  overflow: hidden;
  align-self: start;
  border-radius: 7px;
  box-shadow: 0 8px 18px rgba(25, 29, 28, 0.14);
}

.topic-book-cover img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.topic-book-card h2 {
  margin: 5px 0 1px;
  font-size: 1.42rem;
  line-height: 1.35;
}

.topic-book-card > div > span,
.topic-book-author {
  color: var(--muted);
  font-size: 0.84rem;
}

.topic-book-card > div > p:not(.topic-book-author) {
  margin: 12px 0;
  color: var(--muted);
}

.topic-book-meta,
.topic-book-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.topic-book-actions {
  margin-top: 16px;
  gap: 14px;
}

.topic-detail-aside {
  position: sticky;
  top: 92px;
  display: grid;
  gap: 14px;
}

.topic-related-links {
  display: grid;
  gap: 8px;
}

.topic-related-links a {
  display: flex;
  padding: 10px 0;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--line);
}

.topic-related-links span {
  flex: 0 0 auto;
  color: var(--teal);
  font-size: 0.82rem;
}

@media (max-width: 1080px) {
  .reading-topic-card {
    grid-template-columns: 158px minmax(0, 1fr);
  }

  .reading-topic-covers {
    min-height: 232px;
  }

  .reading-topic-covers img {
    width: 41%;
  }

  .topic-detail-layout {
    grid-template-columns: minmax(0, 1fr) 230px;
  }
}

@media (max-width: 820px) {
  .reading-topic-grid,
  .topic-detail-hero-grid,
  .topic-detail-layout {
    grid-template-columns: 1fr;
  }

  .reading-topic-card {
    grid-template-columns: minmax(145px, 0.42fr) minmax(0, 1fr);
  }

  .topic-detail-cover-stack {
    width: min(100%, 430px);
    min-height: 270px;
  }

  .topic-detail-aside {
    position: static;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .reading-topic-grid {
    gap: 12px;
  }

  .reading-topic-card {
    grid-template-columns: 112px minmax(0, 1fr);
    min-height: 204px;
    border-radius: 11px;
  }

  .reading-topic-covers {
    min-height: 204px;
  }

  .reading-topic-covers img {
    width: 44%;
    max-width: 72px;
  }

  .reading-topic-covers .topic-cover-1 { left: 2%; }
  .reading-topic-covers .topic-cover-2 { left: 19%; }
  .reading-topic-covers .topic-cover-3 { left: 36%; }
  .reading-topic-covers .topic-cover-4 { left: 52%; }

  .reading-topic-copy {
    padding: 17px 15px 15px;
  }

  .reading-topic-copy small {
    margin-bottom: 6px;
    font-size: 0.7rem;
  }

  .reading-topic-copy strong {
    font-size: 1.02rem;
  }

  .reading-topic-copy > span {
    margin-top: 7px;
    font-size: 0.82rem;
    line-height: 1.55;
    -webkit-line-clamp: 3;
  }

  .reading-topic-copy b {
    padding-top: 9px;
    font-size: 0.8rem;
  }

  .topic-detail-hero h1 {
    font-size: clamp(2.2rem, 13vw, 3.35rem);
  }

  .topic-detail-cover-stack {
    min-height: 230px;
  }

  .topic-book-card {
    grid-template-columns: 86px minmax(0, 1fr);
    gap: 14px;
    padding: 13px;
  }

  .topic-book-card h2 {
    font-size: 1.12rem;
  }

  .topic-book-card > div > p:not(.topic-book-author) {
    font-size: 0.86rem;
  }

  .topic-detail-aside {
    grid-template-columns: 1fr;
  }
}