/* Book details: predictable navigation, readable hierarchy and mobile layout. */
#detailScreen {
  padding-bottom: calc(var(--bottom-nav-h) + 34px + var(--safe-area-inset-bottom));
}

#detailScreen .detail-header {
  position: sticky;
  top: 0;
  z-index: 120;
  min-height: 54px;
  padding: calc(10px + var(--safe-area-inset-top)) 0 10px;
  background: linear-gradient(to bottom, var(--bg-primary) 76%, rgba(7, 11, 20, .92));
  backdrop-filter: blur(18px);
}

#detailScreen .detail-tabs {
  position: sticky;
  top: calc(54px + var(--safe-area-inset-top));
  z-index: 110;
  justify-content: flex-start;
  gap: 4px;
  padding: 4px;
  scrollbar-width: none;
  box-shadow: 0 8px 20px rgba(0, 0, 0, .2);
}
#detailScreen .detail-tabs::-webkit-scrollbar { display: none; }
#detailScreen .detail-tab {
  flex: 0 0 auto;
  min-width: max-content;
  padding: 10px 14px;
  border: 0;
  background: transparent;
  color: var(--text-muted);
  font: inherit;
  font-size: 12px;
  white-space: nowrap;
  overflow: visible;
  text-overflow: clip;
}
#detailScreen .detail-tab:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

#detailScreen .detail-content {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}
#detailScreen .detail-hero {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  align-items: start;
  gap: 16px;
}
#detailScreen .detail-cover {
  position: static;
  top: auto;
  width: 112px;
  height: 158px;
  border-radius: 16px;
  box-shadow: 0 16px 34px rgba(0, 0, 0, .34);
}
#detailScreen .detail-info { min-width: 0; }
#detailScreen .detail-title {
  font-size: clamp(19px, 4.8vw, 25px);
  line-height: 1.18;
  overflow-wrap: anywhere;
}
#detailScreen .detail-author { font-size: 13px; line-height: 1.4; }
#detailScreen .detail-category { max-width: 100%; line-height: 1.45; }
#detailScreen .admin-book-stats { gap: 6px; }
#detailScreen .mylist-status-select {
  width: 100%;
  max-width: 360px;
  min-height: 42px;
  font-size: 13px;
}
#detailScreen .detail-description-section {
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: linear-gradient(145deg, rgba(255,255,255,.025), transparent), var(--bg-card);
}
#detailScreen .detail-section-title {
  margin: 0 0 10px;
  color: var(--text-primary);
  font-size: 15px;
}
#detailScreen .detail-desc {
  margin: 0;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.75;
  white-space: pre-line;
}
#detailScreen .detail-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}
#detailScreen .btn-detail {
  justify-content: center;
  min-height: 42px;
  padding: 10px 12px;
  font-size: 12px;
  text-align: center;
}
#detailScreen .detail-action-primary {
  grid-column: 1 / -1;
  color: #061018;
  border: 0;
  background: linear-gradient(135deg, #67e8f9, #8b5cf6);
  font-weight: 800;
}

@media (max-width: 420px) {
  #detailScreen .detail-hero { grid-template-columns: 94px minmax(0, 1fr); gap: 12px; }
  #detailScreen .detail-cover { width: 94px; height: 134px; }
  #detailScreen .detail-actions { grid-template-columns: minmax(0, 1fr); }
  #detailScreen .detail-action-primary { grid-column: auto; }
}

@media (min-width: 768px) {
  #detailScreen .detail-hero { grid-template-columns: 190px minmax(0, 1fr); gap: 28px; }
  #detailScreen .detail-cover { width: 190px; height: 268px; }
  #detailScreen .detail-description-section { padding: 22px 24px; }
  #detailScreen .detail-actions { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  #detailScreen .detail-action-primary { grid-column: auto; }
}

@media (min-width: 1280px) {
  #detailScreen { padding-bottom: 40px; }
  #detailScreen .detail-content { max-width: 980px; margin-inline: auto; }
  #detailScreen .detail-header, #detailScreen .detail-tabs { position: relative; top: auto; }
}