.books-shell {
  position: relative;
  z-index: 1;
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 70px 0;
}

.books-hero {
  margin-bottom: 32px;
  text-align: center;
}

.books-hero h1 {
  margin: 0 0 12px;
  font-size: clamp(3.2rem, 10vw, 6rem);
  line-height: 0.92;
  text-shadow: var(--glow-strong);
  text-transform: uppercase;
}

.books-hero p {
  max-width: 700px;
  margin: 0 auto;
  color: var(--text-dim);
  line-height: 1.7;
}

.library-heading {
  max-width: 760px;
  margin: 0 0 24px;
}

.library-heading h2 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1;
}

.library-heading > p:last-child {
  margin: 12px 0 0;
  color: var(--text-dim);
  line-height: 1.7;
}

.chapter-kicker {
  margin: 0;
  color: var(--accent-2);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.book-library {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-bottom: 58px;
}

.library-book {
  min-height: 410px;
  display: grid;
  grid-template-columns: minmax(170px, 0.78fr) minmax(0, 1.22fr);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 14px;
  background: rgba(5, 9, 17, 0.78);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(14px);
}

.library-cover {
  position: relative;
  min-height: 100%;
  overflow: hidden;
  background: #07101a;
}

.library-cover img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
}

.library-cover::after {
  position: absolute;
  inset: 0;
  content: '';
  background: linear-gradient(180deg, transparent 45%, rgba(0, 0, 0, 0.58));
}

.library-cover.placeholder {
  display: grid;
  place-items: center;
  padding: 24px;
  color: rgba(255, 255, 255, 0.62);
  background:
    radial-gradient(circle at 28% 20%, rgba(0, 200, 255, 0.28), transparent 30%),
    radial-gradient(circle at 75% 72%, rgba(138, 125, 255, 0.3), transparent 34%),
    #07101a;
  font-size: clamp(3.8rem, 8vw, 6.4rem);
  font-weight: 900;
  letter-spacing: -0.08em;
}

.library-book-body {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 26px;
}

.library-book-body h3 {
  margin: 8px 0 12px;
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  line-height: 1;
}

.library-book-body > p:not(.chapter-kicker):not(.genre-note) {
  margin: 0;
  color: var(--text-dim);
  line-height: 1.65;
}

.genre-list {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.genre-list li {
  padding: 7px 10px;
  border: 1px solid rgba(216, 255, 99, 0.2);
  border-radius: 999px;
  color: rgba(235, 255, 180, 0.82);
  background: rgba(216, 255, 99, 0.06);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
}

.genre-note {
  margin: 20px 0 0;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
}

.library-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: auto;
  padding-top: 24px;
}

.book-button {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 14px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  color: #fff;
  background: rgba(255, 255, 255, 0.055);
  font: inherit;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
  transition: transform 160ms ease, opacity 160ms ease;
}

.book-button.primary {
  border-color: transparent;
  background: linear-gradient(135deg, #1f6feb, #00a6ff);
}

.book-button:hover {
  transform: translateY(-3px);
  opacity: 1;
}

.book-button:focus-visible {
  transform: translateY(-1px);
  opacity: 1;
  outline: 3px solid #d8ff63;
  outline-offset: 3px;
  box-shadow: 0 0 0 6px rgba(216, 255, 99, 0.16);
}

.book-button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
  transform: none;
}

footer {
  margin-top: 54px;
  color: var(--text-dim);
  font-size: 0.85rem;
  text-align: center;
}

@media (max-width: 860px) {
  .books-shell {
    width: min(100% - 24px, 1120px);
    padding: 48px 0;
  }

  .book-library {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 580px) {
  .library-book {
    grid-template-columns: 1fr;
  }

  .library-cover {
    min-height: 330px;
  }
}