.rb-book-promo,
.rb-book-modal {
  --rb-book-bg: #fbf7f1;
  --rb-book-surface: #ffffff;
  --rb-book-text: #1a1a1a;
  --rb-book-muted: #5a5148;
  --rb-book-accent: #8b2635;
  --rb-book-line: rgba(27, 54, 93, 0.16);
  box-sizing: border-box;
  color: var(--rb-book-text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.rb-book-promo *,
.rb-book-modal * {
  box-sizing: border-box;
}

.rb-book-promo {
  position: sticky;
  top: 0;
  z-index: 3000;
  width: 100%;
  background: var(--rb-book-bg);
  border-bottom: 1px solid var(--rb-book-line);
  box-shadow: 0 10px 24px rgba(27, 54, 93, 0.08);
}

.rb-book-promo__inner {
  display: flex;
  align-items: center;
  gap: 14px;
  width: min(1180px, 100%);
  min-height: 76px;
  margin: 0 auto;
  padding: 10px clamp(16px, 4vw, 40px);
  color: inherit;
  text-decoration: none;
}

.rb-book-promo__cover,
.rb-book-modal__cover {
  flex: 0 0 auto;
  display: block;
  width: 42px;
  height: 56px;
  border: 1px solid rgba(139, 38, 53, 0.24);
  border-radius: 4px;
  background: var(--rb-book-surface);
  box-shadow: 0 10px 18px rgba(27, 54, 93, 0.12);
  object-fit: cover;
  object-position: center;
}

.rb-book-promo__copy {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.rb-book-promo__kicker,
.rb-book-modal__kicker {
  color: var(--rb-book-accent);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.2;
  text-transform: uppercase;
}

.rb-book-promo__copy strong {
  color: var(--rb-book-text);
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.25;
}

.rb-book-promo__copy span:last-child {
  color: var(--rb-book-muted);
  font-size: 0.88rem;
  line-height: 1.35;
}

.rb-book-promo__cta,
.rb-book-modal__cta {
  flex: 0 0 auto;
  margin-left: auto;
  padding: 8px 14px;
  border: 1px solid var(--rb-book-accent);
  border-radius: 999px;
  color: var(--rb-book-accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1;
  text-transform: uppercase;
}

.rb-book-promo[hidden],
.rb-book-modal[hidden] {
  display: none !important;
}

.rb-book-modal {
  position: fixed;
  inset: 0;
  z-index: 5000;
  display: grid;
  place-items: center;
  padding: 24px;
}

.rb-book-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 18, 24, 0.58);
  backdrop-filter: blur(4px);
}

.rb-book-modal__dialog {
  position: relative;
  width: min(720px, 100%);
  max-height: min(680px, calc(100vh - 48px));
  overflow: auto;
  padding: clamp(24px, 5vw, 38px);
  border: 1px solid var(--rb-book-line);
  border-radius: 8px;
  background: var(--rb-book-surface);
  box-shadow: 0 28px 80px rgba(15, 18, 24, 0.28);
}

.rb-book-modal__close {
  position: absolute;
  top: 14px;
  right: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--rb-book-line);
  border-radius: 999px;
  background: var(--rb-book-surface);
  color: var(--rb-book-text);
  cursor: pointer;
  font: inherit;
  line-height: 1;
}

.rb-book-modal__link {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 22px;
  color: inherit;
  text-decoration: none;
}

.rb-book-modal__cover {
  width: 150px;
  height: 210px;
}

.rb-book-modal__content {
  display: grid;
  gap: 12px;
  min-width: 0;
  padding-right: 28px;
}

.rb-book-modal__content h2 {
  margin: 0;
  color: var(--rb-book-text);
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 500;
  letter-spacing: 0;
  line-height: 1;
}

.rb-book-modal__content p {
  margin: 0;
  color: var(--rb-book-muted);
  font-size: 1rem;
  line-height: 1.55;
}

.rb-book-modal__cta {
  justify-self: start;
  margin-left: 0;
  margin-top: 6px;
}

.rb-book-modal-open,
.rb-book-modal-open body {
  overflow: hidden;
}

@media (max-width: 640px) {
  .rb-book-promo__inner {
    align-items: flex-start;
    gap: 10px;
    min-height: 0;
    padding: 9px 14px;
  }

  .rb-book-promo__cover {
    width: 34px;
    height: 46px;
  }

  .rb-book-promo__copy strong {
    font-size: 0.92rem;
  }

  .rb-book-promo__copy span:last-child {
    font-size: 0.8rem;
  }

  .rb-book-promo__cta {
    display: none;
  }

  .rb-book-modal {
    align-items: end;
    padding: 14px;
  }

  .rb-book-modal__dialog {
    max-height: calc(100vh - 28px);
    padding: 24px 20px;
  }

  .rb-book-modal__link {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .rb-book-modal__cover {
    width: 96px;
    height: 134px;
  }

  .rb-book-modal__content {
    padding-right: 0;
  }
}