.library-page,
.ebook-page {
  --promo-blue: #286df4;
  --promo-violet: #6b4ce6;
  --promo-cyan: #20bde8;
  --promo-ink: #111633;
  --promo-muted: #61708e;
  --promo-line: rgba(36, 74, 154, .14);
}

.book-promo-banner,
.book-promo-product {
  position: relative;
  overflow: hidden;
  color: var(--promo-ink);
  background:
    radial-gradient(circle at 88% 18%, rgba(32, 189, 232, .18), transparent 30%),
    radial-gradient(circle at 10% 90%, rgba(107, 76, 230, .13), transparent 34%),
    linear-gradient(145deg, #ffffff, #f0f5ff 58%, #eefbff);
  border: 1px solid var(--promo-line);
  box-shadow: 0 28px 80px rgba(29, 66, 145, .12);
}

.book-promo-banner::before,
.book-promo-product::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .42;
  background-image:
    linear-gradient(rgba(53, 92, 172, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(53, 92, 172, .07) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: linear-gradient(100deg, #000, transparent 82%);
}

.book-promo-banner {
  width: min(1200px, calc(100% - 10vw));
  margin: 68px auto 18px;
  padding: clamp(28px, 5vw, 58px);
  display: grid;
  grid-template-columns: minmax(0, .82fr) minmax(460px, 1.18fr);
  gap: clamp(28px, 6vw, 70px);
  align-items: center;
  border-radius: 32px;
}

.book-promo-copy,
.book-promo-steps,
.book-promo-actions {
  position: relative;
  z-index: 1;
}

.book-promo-kicker {
  margin: 0;
  color: var(--promo-blue);
  font: 800 .66rem/1.5 Michroma, Manrope, sans-serif;
  letter-spacing: .12em;
}

.book-promo-copy h2 {
  margin: 18px 0 16px;
  color: var(--promo-ink);
  font-size: clamp(2.6rem, 5vw, 5.1rem);
  line-height: .88;
  letter-spacing: -.07em;
}

.book-promo-copy h2 span {
  color: transparent;
  background: linear-gradient(100deg, var(--promo-violet), var(--promo-blue) 58%, var(--promo-cyan));
  background-clip: text;
  -webkit-background-clip: text;
}

.book-promo-copy > p:not(.book-promo-kicker) {
  max-width: 590px;
  margin: 0;
  color: var(--promo-muted);
  line-height: 1.75;
}

.book-promo-steps {
  display: grid;
  gap: 10px;
}

.book-promo-step {
  min-height: 78px;
  padding: 16px 18px;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  border: 1px solid var(--promo-line);
  border-radius: 17px;
  background: rgba(255, 255, 255, .78);
  box-shadow: 0 12px 28px rgba(37, 63, 124, .06);
}

.book-promo-step > b {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  color: #fff;
  background: linear-gradient(135deg, var(--promo-violet), var(--promo-blue));
  font-size: .72rem;
}

.book-promo-step span {
  display: grid;
  gap: 3px;
  color: var(--promo-muted);
  font-size: .78rem;
  line-height: 1.48;
}

.book-promo-step strong {
  color: var(--promo-ink);
  font-size: .9rem;
}

.book-promo-actions {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.book-promo-action {
  min-height: 45px;
  padding: 0 17px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--promo-line);
  border-radius: 999px;
  color: var(--promo-ink);
  background: rgba(255, 255, 255, .82);
  font-size: .69rem;
  font-weight: 850;
  text-decoration: none;
  transition: transform .22s ease, box-shadow .22s ease;
}

.book-promo-action.primary {
  border-color: transparent;
  color: #fff;
  background: linear-gradient(110deg, var(--promo-violet), var(--promo-blue), var(--promo-cyan));
  box-shadow: 0 15px 32px rgba(45, 104, 226, .2);
}

.book-promo-action:hover {
  transform: translateY(-2px);
}

.book-promo-note {
  position: relative;
  z-index: 1;
  margin: 13px 0 0;
  color: var(--promo-muted);
  font-size: .65rem;
  line-height: 1.55;
}

.book-promo-product {
  width: min(1120px, calc(100% - 10vw));
  margin: 0 auto;
  padding: clamp(26px, 4vw, 46px);
  display: grid;
  grid-template-columns: minmax(0, .82fr) minmax(420px, 1.18fr);
  gap: clamp(26px, 5vw, 58px);
  align-items: center;
  border-radius: 28px;
}

.book-promo-product-wrap {
  padding: 88px 0 28px;
  background: linear-gradient(180deg, #f4f7fc, #f7f9fe);
}

.book-promo-product .book-promo-copy h2 {
  font-size: clamp(2.35rem, 4.4vw, 4.4rem);
}

.promo-price {
  display: inline-flex !important;
  flex-wrap: nowrap;
  align-items: baseline;
  gap: 7px 11px;
}

.promo-old-price {
  color: #8b96ab;
  font-size: .58em;
  font-weight: 700;
  text-decoration: line-through;
  text-decoration-thickness: 1.5px;
}

.promo-new-price {
  color: var(--promo-blue);
  font-weight: 900;
  letter-spacing: -.04em;
}

.shelf-book-copy > b.promo-price,
.library-card-footer > strong.promo-price {
  line-height: 1.1;
}

.promo-mini-badge {
  width: fit-content;
  margin-top: 7px;
  padding: 6px 9px;
  border-radius: 999px;
  color: #fff;
  background: linear-gradient(105deg, var(--promo-violet), var(--promo-blue));
  font-size: .52rem;
  font-weight: 900;
  letter-spacing: .06em;
}

.library-page .shelf-book-real .shelf-book-copy {
  min-height: 150px;
  padding-top: 14px;
}

.library-page .shelf-book-copy > small {
  min-height: 2.8em;
  color: var(--lib-blue);
  line-height: 1.4;
}

.library-page .shelf-book-copy > strong {
  min-height: 3.75em;
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.library-page .shelf-book-copy > .promo-mini-badge {
  min-height: 24px;
  margin-top: 2px;
  padding: 0 9px;
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  color: #fff;
  background: linear-gradient(105deg, var(--promo-violet), var(--promo-blue));
  font-size: .48rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: .065em;
  white-space: nowrap;
}

.library-page .shelf-book-copy > b.promo-price {
  min-height: 23px;
  margin-top: auto;
  display: flex !important;
  gap: 8px;
  align-items: baseline;
  white-space: nowrap;
}

.library-page .shelf-book-copy > b.promo-price > .promo-old-price {
  color: #8b96ab;
  font-size: .62rem;
  font-weight: 650;
  text-decoration: line-through;
  text-decoration-thickness: 1.25px;
}

.library-page .shelf-book-copy > b.promo-price > .promo-new-price {
  color: var(--promo-ink);
  font-size: .92rem;
  font-weight: 900;
  letter-spacing: -.035em;
}

.library-page .library-card-copy > .promo-mini-badge {
  color: #fff;
}

.library-page .library-card-footer > strong.promo-price > .promo-old-price {
  color: #8b96ab;
}

.library-page .library-card-footer > strong.promo-price > .promo-new-price {
  color: var(--promo-blue);
}

.book-promo-confirm {
  padding: 13px 14px !important;
  border: 1px solid rgba(46, 114, 255, .2) !important;
  border-radius: 13px;
  background: #eff5ff;
}

.book-promo-confirm a {
  color: var(--promo-blue);
  font-weight: 850;
}

.book-promo-confirm small {
  display: block;
  margin-top: 4px;
  color: var(--promo-muted);
  font-size: .65rem;
}

.ebook-price strong.promo-price {
  display: flex !important;
}

.ebook-order-summary b.promo-price {
  margin-top: 4px;
}

@media (max-width: 900px) {
  .book-promo-banner,
  .book-promo-product {
    grid-template-columns: 1fr;
  }

  .book-promo-banner {
    width: min(100% - 40px, 720px);
    margin-top: 46px;
  }

  .book-promo-product {
    width: min(100% - 40px, 720px);
  }
}

@media (max-width: 560px) {
  .book-promo-banner,
  .book-promo-product {
    width: calc(100% - 28px);
    padding: 24px 18px;
    border-radius: 22px;
  }

  .book-promo-banner {
    margin-top: 34px;
  }

  .book-promo-product-wrap {
    padding: 64px 0 18px;
  }

  .book-promo-copy h2,
  .book-promo-product .book-promo-copy h2 {
    font-size: clamp(2.45rem, 15vw, 3.55rem);
  }

  .book-promo-action {
    width: 100%;
  }

  .library-page .shelf-book-real .shelf-book-copy {
    min-height: 154px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .book-promo-action {
    transition: none;
  }
}