.books-surface {
  --books-card-bg: rgba(255, 255, 255, 0.92);
  --books-card-border-color: rgba(15, 23, 42, 0.08);
  --books-card-shadow: 0 30px 70px -45px rgba(15, 23, 42, 0.35);
  --books-card-highlight: rgba(99, 102, 241, 0.12);
  --books-accent: var(--feed-accent, #6366f1);
  --books-muted: var(--feed-muted-color, #475569);
  --books-empty-icon: url("data:image/svg+xml,%3Csvg%20xmlns%3D'http%3A//www.w3.org/2000/svg'%20viewBox%3D'0%200%2064%2064'%20fill%3D'none'%3E%3Crect%20x%3D'6'%20y%3D'16'%20width%3D'18'%20height%3D'36'%20rx%3D'4'%20fill%3D'%23a5b4fc'/%3E%3Crect%20x%3D'24'%20y%3D'12'%20width%3D'18'%20height%3D'40'%20rx%3D'4'%20fill%3D'%237dd3fc'/%3E%3Crect%20x%3D'42'%20y%3D'18'%20width%3D'16'%20height%3D'34'%20rx%3D'4'%20fill%3D'%23c4b5fd'/%3E%3C/svg%3E");
  min-height: 100vh;
  background: radial-gradient(circle at top, rgba(99, 102, 241, 0.18), transparent 55%),
    radial-gradient(circle at 20% 20%, rgba(14, 165, 233, 0.12), transparent 45%),
    var(--feed-surface, var(--body-bg));
}

body.dark.books-surface {
  --books-card-bg: rgba(15, 23, 42, 0.78);
  --books-card-border-color: rgba(99, 102, 241, 0.35);
  --books-card-shadow: 0 40px 70px -45px rgba(2, 6, 23, 0.9);
  --books-card-highlight: rgba(14, 165, 233, 0.18);
  --books-muted: rgba(226, 232, 240, 0.78);
  background: radial-gradient(circle at 15% 10%, rgba(99, 102, 241, 0.35), transparent 45%),
    radial-gradient(circle at 70% 0%, rgba(14, 165, 233, 0.18), transparent 40%),
    var(--feed-surface, #020617);
}

.page-layout--books {
  align-items: flex-start;
  gap: clamp(18px, 3vw, 32px);
}

.books-main {
  display: flex;
  flex-direction: column;
  gap: clamp(20px, 3vw, 36px);
}

.books-main p,
.my-books-main p,
.author-page p {
  line-height: 1.65;
  color: var(--books-muted);
}

.books-main h1,
.books-main h2,
.my-books-main h1,
.my-books-main h2,
.author-page h1,
.author-page h2 {
  letter-spacing: -0.01em;
}

.books-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 260px);
  gap: clamp(18px, 4vw, 40px);
  padding: clamp(22px, 4vw, 38px);
  border-radius: clamp(18px, 3.6vw, 30px);
  background: linear-gradient(145deg, rgba(99, 102, 241, 0.2), rgba(14, 165, 233, 0.08)), var(--books-card-bg);
  border: 1px solid var(--books-card-border-color);
  box-shadow: var(--books-card-shadow);
  overflow: hidden;
  isolation: isolate;
}

.books-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 85% 15%, rgba(14, 165, 233, 0.28), transparent 55%);
  opacity: 0.9;
  pointer-events: none;
  z-index: -1;
}

.books-hero__text {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.books-hero__eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.75rem;
  color: var(--feed-muted-color);
}

.books-hero__title {
  margin: 0;
  font-size: clamp(1.8rem, 4.6vw, 2.75rem);
  line-height: 1.2;
}

.books-hero__subtitle {
  margin: 0;
  color: var(--books-muted);
  font-size: clamp(0.98rem, 2vw, 1.08rem);
  max-width: 60ch;
}

.books-hero__meta {
  display: grid;
  gap: 12px;
  align-content: start;
}

.books-hero__stat {
  padding: 12px 16px;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.85), rgba(255, 255, 255, 0.6));
  border: 1px solid rgba(148, 163, 184, 0.25);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.45);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

body.dark .books-hero__stat {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.6));
  border-color: rgba(99, 102, 241, 0.35);
  box-shadow: inset 0 1px 0 rgba(99, 102, 241, 0.18);
}

.books-hero__stat-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--feed-muted-color);
}

.books-hero__stat-value {
  font-size: 1.3rem;
  font-weight: 700;
}

.books-filters {
  position: relative;
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  align-items: end;
  padding: clamp(16px, 3vw, 24px);
  border-radius: 24px;
  background: linear-gradient(120deg, rgba(99, 102, 241, 0.16), rgba(14, 165, 233, 0.08)), var(--books-card-bg);
  border: 1px solid var(--books-card-border-color);
  box-shadow: var(--books-card-shadow);
  overflow: hidden;
}

.books-filters::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 10% 10%, rgba(255, 255, 255, 0.3), transparent 45%);
  pointer-events: none;
}

.books-filter-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.books-filter-field label {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--feed-text-color, inherit);
}

.books-filter-help {
  font-size: 0.82rem;
  color: var(--books-muted);
  margin: 0;
}

.books-tag-input {
  display: flex;
  gap: 8px;
}

.books-tag-input input {
  flex: 1;
  border-radius: 16px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  padding: 10px 12px;
  font-size: 0.95rem;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.6);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.books-tag-input input:focus {
  border-color: var(--books-accent);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
  outline: none;
}

.books-tag-input button {
  flex-shrink: 0;
}

body.dark .books-tag-input input {
  background: rgba(15, 23, 42, 0.65);
  border-color: rgba(99, 102, 241, 0.38);
  color: inherit;
  box-shadow: inset 0 1px 0 rgba(99, 102, 241, 0.25);
}

.books-filter-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

.books-filter-button {
  border-radius: 999px;
  border: 1px solid rgba(99, 102, 241, 0.55);
  background: linear-gradient(145deg, rgba(99, 102, 241, 0.85), rgba(14, 165, 233, 0.75));
  color: #fff;
  padding: 10px 18px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 15px 25px -15px rgba(99, 102, 241, 0.7);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.books-filter-button:hover,
.books-filter-button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 20px 40px -20px rgba(99, 102, 241, 0.75);
  outline: none;
}

.books-filter-button--ghost {
  background: rgba(255, 255, 255, 0.18);
  color: inherit;
  border-color: rgba(148, 163, 184, 0.5);
  box-shadow: none;
}

.books-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  cursor: pointer;
}

.books-toggle input {
  appearance: none;
  width: 42px;
  height: 22px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  background: rgba(148, 163, 184, 0.2);
  position: relative;
  transition: background 0.2s ease;
}

.books-toggle input::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: white;
  transition: transform 0.2s ease;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.16);
}

.my-books-main {
  display: flex;
  flex-direction: column;
  gap: clamp(18px, 3vw, 32px);
  width: 100%;
}

.my-books-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: clamp(18px, 4vw, 36px);
  padding: clamp(20px, 4vw, 36px);
  border-radius: clamp(18px, 3vw, 28px);
  background: linear-gradient(135deg, rgba(96, 165, 250, 0.14), rgba(167, 139, 250, 0.12)) var(--feed-card-bg);
  border: 1px solid rgba(148, 163, 184, 0.26);
  box-shadow: var(--feed-card-shadow);
}

body.dark .my-books-header {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.18), rgba(129, 140, 248, 0.16)) rgba(15, 23, 42, 0.65);
  border-color: rgba(99, 102, 241, 0.32);
}

.my-books-header__user {
  display: flex;
  align-items: center;
  gap: clamp(16px, 3vw, 28px);
}

.my-books-avatar {
  width: clamp(72px, 8vw, 96px);
  aspect-ratio: 1 / 1;
  border-radius: 24px;
  overflow: hidden;
  background: rgba(148, 163, 184, 0.18);
  display: grid;
  place-items: center;
}

.my-books-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.my-books-header__identity {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.my-books-header__eyebrow {
  margin: 0;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--feed-muted-color);
}

.my-books-header__title {
  margin: 0;
  font-size: clamp(1.8rem, 4.4vw, 2.6rem);
  line-height: 1.2;
}

.my-books-header__subtitle {
  margin: 0;
  color: var(--feed-muted-color);
  font-size: clamp(0.92rem, 2.2vw, 1rem);
}

.my-books-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: clamp(12px, 2.4vw, 20px);
  margin: 0;
}

.my-books-stat {
  padding: 12px 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.65);
  border: 1px solid rgba(148, 163, 184, 0.28);
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

body.dark .my-books-stat {
  background: rgba(15, 23, 42, 0.55);
  border-color: rgba(99, 102, 241, 0.28);
}

.my-books-stat dt {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--feed-muted-color);
  margin: 0;
}

.my-books-stat dd {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
}

.my-books-controls {
  display: grid;
  gap: 16px;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1.5fr) minmax(0, 1fr);
  padding: clamp(16px, 3vw, 24px);
  border-radius: 20px;
  background: var(--feed-card-bg);
  border: 1px solid var(--feed-card-border);
  box-shadow: var(--feed-card-shadow);
  align-items: center;
}

.my-books-shelf-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.my-books-filter-btn {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.42);
  background: rgba(255, 255, 255, 0.75);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.my-books-filter-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  padding: 2px 8px;
  margin-left: 6px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
  background: rgba(148, 163, 184, 0.18);
  color: inherit;
}

.my-books-filter-btn:hover,
.my-books-filter-btn:focus-visible {
  border-color: rgba(99, 102, 241, 0.55);
  color: var(--accent-color, #4338ca);
}

.my-books-filter-btn.is-active {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.18), rgba(14, 165, 233, 0.2));
  border-color: rgba(99, 102, 241, 0.6);
  color: inherit;
}

body.dark .my-books-filter-btn {
  background: rgba(15, 23, 42, 0.82);
  border-color: rgba(99, 102, 241, 0.38);
  color: #e2e8f0;
  box-shadow: inset 0 1px 0 rgba(99, 102, 241, 0.16);
}

body.dark .my-books-filter-count {
  background: rgba(99, 102, 241, 0.22);
}

body.dark .my-books-filter-btn:hover,
body.dark .my-books-filter-btn:focus-visible {
  border-color: rgba(129, 140, 248, 0.85);
  color: #cbd5f5;
}

body.dark .my-books-filter-btn.is-active {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.3), rgba(14, 165, 233, 0.26));
  border-color: rgba(129, 140, 248, 0.9);
  color: #e5e7ff;
  box-shadow: 0 10px 28px rgba(2, 6, 23, 0.65);
}

.my-books-search input {
  width: 100%;
  border-radius: 14px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  padding: 10px 12px;
  font-size: 0.95rem;
  background: rgba(255, 255, 255, 0.82);
}

body.dark .my-books-search input {
  background: rgba(15, 23, 42, 0.6);
  border-color: rgba(99, 102, 241, 0.4);
  color: inherit;
}

.my-books-sort {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
}

.my-books-sort select {
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  padding: 8px 12px;
  font-size: 0.95rem;
  background: rgba(255, 255, 255, 0.82);
}

body.dark .my-books-sort select {
  background: rgba(15, 23, 42, 0.6);
  border-color: rgba(99, 102, 241, 0.4);
  color: inherit;
}

.my-books-feedback {
  min-height: 1.2rem;
  font-size: 0.9rem;
  color: var(--feed-muted-color);
}

.my-books-feedback[data-variant="success"] {
  color: #059669;
}

.my-books-feedback[data-variant="error"] {
  color: #dc2626;
}

.my-books-feedback[data-variant="warning"] {
  color: #d97706;
}

.my-books-auth {
  padding: clamp(18px, 3vw, 28px);
  border-radius: 18px;
  border: 1px dashed rgba(148, 163, 184, 0.5);
  background: rgba(255, 255, 255, 0.6);
  display: grid;
  gap: 12px;
  justify-items: start;
}

body.dark .my-books-auth {
  background: rgba(15, 23, 42, 0.6);
  border-color: rgba(99, 102, 241, 0.4);
}

.my-books-auth__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.my-books-auth__btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  background: rgba(255, 255, 255, 0.78);
  font-weight: 600;
  text-decoration: none;
  color: inherit;
}

.my-books-auth__btn--primary {
  border-color: rgba(99, 102, 241, 0.6);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.24), rgba(14, 165, 233, 0.24));
}

.my-books-grid {
  display: grid;
  gap: clamp(16px, 3vw, 24px);
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.my-books-grid[data-state="loading"] {
  opacity: 0.85;
}

.my-books-empty {
  padding: clamp(18px, 3vw, 28px);
  border-radius: 18px;
  border: 1px dashed var(--books-card-border-color);
  text-align: center;
  color: var(--books-muted);
  background: var(--books-card-bg);
  box-shadow: var(--books-card-shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.profile-books-view {
  display: flex;
  flex-direction: column;
  gap: clamp(16px, 3vw, 24px);
}

.profile-books-admin {
  gap: clamp(14px, 2vw, 18px);
}

.profile-books-admin__toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.profile-books-admin__frame-wrap {
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--books-card-border-color);
  background: var(--books-card-bg);
  box-shadow: var(--books-card-shadow);
}

.profile-books-admin__frame {
  width: 100%;
  min-height: 720px;
  border: none;
  display: block;
}

body.dark .my-books-empty {
  background: var(--books-card-bg);
}

.my-book-card {
  display: grid;
  grid-template-columns: minmax(120px, 140px) minmax(0, 1fr);
  gap: 18px;
  padding: clamp(16px, 2.4vw, 22px);
  border-radius: 20px;
  background: var(--books-card-bg);
  border: 1px solid var(--books-card-border-color);
  box-shadow: var(--books-card-shadow);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  position: relative;
  overflow: hidden;
}

.my-book-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 85% 15%, rgba(99, 102, 241, 0.18), transparent 55%);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.my-book-card:hover,
.my-book-card:focus-within {
  transform: translateY(-3px);
  box-shadow: 0 24px 44px -28px rgba(15, 23, 42, 0.55);
}

.my-book-card:hover::after,
.my-book-card:focus-within::after {
  opacity: 1;
}

.my-book-card__cover {
  width: 100%;
  border-radius: 16px;
  overflow: hidden;
  aspect-ratio: 2 / 3;
  background: rgba(148, 163, 184, 0.18);
  display: grid;
  place-items: center;
  border: 1px solid rgba(148, 163, 184, 0.25);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.my-book-card__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.my-book-card__cover-placeholder {
  font-size: 2.4rem;
}

.my-book-card__body {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.my-book-card__title {
  margin: 0;
  font-size: 1.2rem;
  line-height: 1.3;
}

.my-book-card__authors {
  margin: 4px 0 0;
  color: var(--books-muted);
  font-size: 0.95rem;
}

.my-book-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.my-book-card__community {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  color: rgba(100, 116, 139, 0.9);
}

body.dark .my-book-card__community {
  color: rgba(203, 213, 225, 0.85);
}

.my-book-card__meta-pill {
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(96, 165, 250, 0.22);
  border: 1px solid rgba(96, 165, 250, 0.3);
  font-size: 0.82rem;
  font-weight: 600;
}

.my-book-card__rating {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.95rem;
}

.my-book-card__rating-star {
  color: #facc15;
}

.my-book-card__rating-star--half {
  position: relative;
  color: rgba(250, 204, 21, 0.5);
}

.my-book-card__rating-star--empty {
  color: rgba(148, 163, 184, 0.5);
}

.my-book-card__rating-value {
  font-weight: 600;
}

.my-book-card__progress {
  display: grid;
  gap: 6px;
}

.my-book-card__progress-bar {
  position: relative;
  width: 100%;
  height: 8px;
  border-radius: 6px;
  background: rgba(148, 163, 184, 0.32);
  overflow: hidden;
}

.my-book-card__progress-fill {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.85), rgba(14, 165, 233, 0.9));
  box-shadow: 0 0 10px rgba(14, 165, 233, 0.4);
  transition: width 0.4s ease;
}

.my-book-card__progress-label {
  font-size: 0.88rem;
  color: var(--feed-muted-color);
}

.my-book-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: auto;
}

.my-book-card__shelf-control {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.85rem;
}

.my-book-card__shelf-select {
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  padding: 6px 10px;
  font-size: 0.95rem;
  background: rgba(255, 255, 255, 0.85);
}

body.dark .my-book-card__shelf-select {
  background: rgba(15, 23, 42, 0.6);
  border-color: rgba(99, 102, 241, 0.38);
  color: inherit;
}

.my-book-card__action-btn {
  padding: 8px 14px;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  background: rgba(15, 23, 42, 0.82);
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.my-book-card__action-btn:hover,
.my-book-card__action-btn:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 10px 24px -18px rgba(99, 102, 241, 0.6);
}

.my-book-card__icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  background: rgba(15, 23, 42, 0.82);
  color: inherit;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.my-book-card__icon-btn svg {
  width: 18px;
  height: 18px;
}

.my-book-card__icon-btn:hover,
.my-book-card__icon-btn:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 10px 24px -18px rgba(99, 102, 241, 0.6);
}

.my-book-card__icon-btn--danger {
  color: #ef4444;
}

.my-book-card__icon-btn--danger:hover,
.my-book-card__icon-btn--danger:focus-visible {
  border-color: rgba(239, 68, 68, 0.6);
  box-shadow: 0 10px 24px -18px rgba(239, 68, 68, 0.6);
}

.my-book-card__action-btn--primary {
  border-color: rgba(99, 102, 241, 0.6);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.22), rgba(14, 165, 233, 0.24));
}

.my-book-card__action-link {
  color: var(--accent-color, #4338ca);
  font-weight: 600;
  text-decoration: none;
  padding: 0 4px;
}

.book-card__actions {
  margin-top: 12px;
}

.book-shelf__control {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.book-shelf__button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  background: transparent;
  color: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.book-shelf__button:hover,
.book-shelf__button:focus-visible {
  border-color: rgba(99, 102, 241, 0.75);
  background: rgba(99, 102, 241, 0.1);
  outline: none;
}

.book-shelf__button.is-shelf-active {
  border-color: color-mix(in srgb, var(--books-accent) 70%, transparent);
  background: color-mix(in srgb, var(--books-accent) 22%, var(--books-card-bg) 78%);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--books-accent) 20%, transparent);
}

.book-shelf__caret {
  font-size: 0.75rem;
  opacity: 0.7;
}

.book-shelf__menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 200px;
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 8px;
  border-radius: 14px;
  background: color-mix(in srgb, var(--books-card-bg) 96%, transparent);
  border: 1px solid color-mix(in srgb, var(--books-card-border-color) 85%, transparent);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.2);
  z-index: 20;
}

.book-shelf__menu.is-open {
  display: flex;
}

.book-shelf__option {
  width: 100%;
  text-align: left;
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: color-mix(in srgb, var(--books-card-bg) 92%, transparent);
  color: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.book-shelf__option:hover,
.book-shelf__option:focus-visible {
  border-color: rgba(99, 102, 241, 0.55);
  background: rgba(99, 102, 241, 0.14);
  outline: none;
}

.book-shelf__option.is-active {
  border-color: color-mix(in srgb, var(--books-accent) 70%, transparent);
  background: color-mix(in srgb, var(--books-accent) 22%, var(--books-card-bg) 78%);
}

.book-shelf__control.is-disabled {
  opacity: 0.6;
  pointer-events: none;
}

.book-card__action {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  background: transparent;
  color: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.book-card__action:hover,
.book-card__action:focus-visible {
  border-color: rgba(99, 102, 241, 0.75);
  background: rgba(99, 102, 241, 0.1);
}

.book-card__shelf-select {
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  background: transparent;
  color: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
  width: auto;
  max-width: 100%;
  min-width: 0;
  flex: 0 1 auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  box-sizing: border-box;
}

.book-card__shelf-select:focus-visible,
.book-card__shelf-select:hover {
  border-color: rgba(99, 102, 241, 0.75);
  background: rgba(99, 102, 241, 0.1);
}

.book-card__shelf-select.is-shelf-active {
  border-color: color-mix(in srgb, var(--books-accent) 70%, transparent);
  background: color-mix(in srgb, var(--books-accent) 18%, var(--books-card-bg) 82%);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--books-accent) 20%, transparent);
}

.book-card__shelf-quick {
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  padding: 6px 14px;
  background: transparent;
  color: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.book-card__shelf-quick:hover,
.book-card__shelf-quick:focus-visible {
  border-color: rgba(99, 102, 241, 0.75);
  background: rgba(99, 102, 241, 0.1);
  outline: none;
}

.book-card__shelf-quick.is-shelf-active {
  border-color: color-mix(in srgb, var(--books-accent) 70%, transparent);
  background: color-mix(in srgb, var(--books-accent) 22%, var(--books-card-bg) 78%);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--books-accent) 20%, transparent);
}

.my-book-card--skeleton {
  pointer-events: none;
}

.skeleton-block--button {
  width: 120px;
  height: 34px;
  border-radius: 12px;
}

@media (max-width: 960px) {
  .my-book-card {
    grid-template-columns: 1fr;
  }

  .my-book-card__cover {
    max-width: 180px;
    margin: 0 auto;
  }
}

@media (max-width: 720px) {
  .my-books-controls {
    grid-template-columns: 1fr;
  }

  .my-books-header {
    padding: 20px;
  }

  .my-books-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
.books-toggle input:checked {
  background: rgba(99, 102, 241, 0.45);
  border-color: rgba(99, 102, 241, 0.6);
}

.books-toggle input:checked::after {
  transform: translateX(18px);
}

.books-toggle__decor {
  display: none;
}

.books-active-tags {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.books-active-tags__empty {
  margin: 0;
  font-size: 0.85rem;
  color: var(--feed-muted-color);
}

.books-tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(99, 102, 241, 0.16);
  border: 1px solid rgba(99, 102, 241, 0.35);
  font-size: 0.85rem;
  cursor: pointer;
}

.books-tag-chip button {
  appearance: none;
  border: none;
  background: transparent;
  padding: 0;
  font-size: 0.9rem;
  cursor: pointer;
  color: inherit;
}

.books-tag-suggestions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.books-tag-suggestions h2 {
  margin: 0;
  font-size: 1.1rem;
}

.books-tag-suggestions__list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.books-tag-suggestions__list button {
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  background: transparent;
  padding: 6px 12px;
  font-size: 0.85rem;
  cursor: pointer;
}

.books-tag-suggestions__list button.is-active {
  background: rgba(99, 102, 241, 0.18);
  border-color: rgba(99, 102, 241, 0.45);
}

.books-status {
  min-height: 1.4rem;
  font-size: 0.9rem;
  color: var(--feed-muted-color);
}

.books-section {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: var(--books-card-bg);
  border-radius: 26px;
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid var(--books-card-border-color);
  box-shadow: var(--books-card-shadow);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.books-section::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 0%, rgba(255, 255, 255, 0.3), transparent 55%);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.books-section:hover,
.books-section:focus-within {
  transform: translateY(-2px);
  box-shadow: 0 30px 60px -40px rgba(15, 23, 42, 0.6);
}

.books-section:hover::after,
.books-section:focus-within::after {
  opacity: 1;
}

.books-section__header h2 {
  margin: 0;
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
}

.books-section__header p {
  margin: 4px 0 0;
  color: var(--books-muted);
  font-size: 0.95rem;
}

.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 18px;
  align-items: stretch;
}

.books-grid .book-card {
  display: grid;
  grid-template-columns: minmax(0, 120px) minmax(0, 1fr);
  gap: 16px;
  padding: 16px;
  border-radius: 18px;
}

.books-grid .book-card__cover {
  aspect-ratio: 2 / 3;
  grid-column: 1;
  grid-row: 1 / span 3;
}

.books-grid .book-card__meta,
.books-grid .book-card__progress,
.books-grid .book-card__footer {
  grid-column: 2;
}

.book-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  border-radius: 22px;
  border: 1px solid var(--books-card-border-color);
  background: var(--books-card-bg);
  padding: 16px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--books-card-shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.book-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 0%, var(--books-card-highlight), transparent 50%);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.book-card:hover,
.book-card:focus-within {
  transform: translateY(-4px);
  box-shadow: 0 25px 50px -30px rgba(15, 23, 42, 0.6);
}

.book-card:hover::before,
.book-card:focus-within::before {
  opacity: 1;
}

.book-card__cover {
  width: 100%;
  aspect-ratio: 3 / 4;
  border-radius: 16px;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.2);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

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

.book-card__meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.book-card__title {
  margin: 0;
  font-size: 1.1rem;
  line-height: 1.35;
}

.book-card__authors {
  margin: 0;
  font-size: 0.9rem;
  color: var(--books-muted);
}

.book-card__details {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--feed-text-color, #0f172a);
}

.book-card__details span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid rgba(59, 130, 246, 0.28);
  background:
    radial-gradient(circle at 10% 20%, rgba(255, 255, 255, 0.7), transparent 50%),
    linear-gradient(135deg, rgba(99, 102, 241, 0.18), rgba(14, 165, 233, 0.14));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.7),
    0 10px 20px -18px rgba(59, 130, 246, 0.6);
}

.book-card__details span::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: linear-gradient(180deg, #60a5fa, #6366f1);
  box-shadow: 0 0 10px rgba(59, 130, 246, 0.65);
}

body.dark .book-card__details {
  color: rgba(226, 232, 240, 0.92);
}

body.dark .book-card__details span {
  border-color: rgba(96, 165, 250, 0.45);
  background:
    radial-gradient(circle at 10% 20%, rgba(96, 165, 250, 0.25), transparent 60%),
    linear-gradient(135deg, rgba(99, 102, 241, 0.28), rgba(14, 165, 233, 0.22));
  box-shadow:
    inset 0 1px 0 rgba(99, 102, 241, 0.25),
    0 10px 18px -16px rgba(14, 165, 233, 0.45);
}

body.dark .book-card__details span::before {
  background: linear-gradient(180deg, #7dd3fc, #818cf8);
  box-shadow: 0 0 12px rgba(125, 211, 252, 0.75);
}

.book-card__progress {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
}

.book-card__progress-bar {
  flex: 1;
  height: 8px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.25);
  overflow: hidden;
}

.book-card__progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #6366f1, #14b8a6);
  border-radius: inherit;
  box-shadow: 0 0 12px rgba(14, 165, 233, 0.35);
  transition: width 0.4s ease;
}

.book-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 0.82rem;
  margin-top: auto;
}

.book-card__owner {
  display: flex;
  align-items: center;
  gap: 8px;
}

.book-card__owner-name {
  color: inherit;
  font-weight: 600;
  text-decoration: none;
}

.book-card__owner-name:hover,
.book-card__owner-name:focus-visible {
  text-decoration: underline;
}

.book-card__avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  background: rgba(148, 163, 184, 0.3);
}

.book-card__shelf {
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.75rem;
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.book-card.is-shelf-active .book-card__shelf {
  background: color-mix(in srgb, var(--books-accent) 24%, var(--books-card-bg) 76%);
  border-color: color-mix(in srgb, var(--books-accent) 70%, transparent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--books-accent) 20%, transparent);
}

.book-card__link {
  align-self: flex-start;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--books-accent);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s ease, transform 0.2s ease;
}

.book-card__link::after {
  content: "→";
  font-size: 1rem;
  transition: transform 0.2s ease;
}

.book-card__link:hover,
.book-card__link:focus-visible {
  color: var(--books-accent);
  transform: translateX(2px);
}

.book-card__link:hover::after,
.book-card__link:focus-visible::after {
  transform: translateX(4px);
}


.books-empty {
  grid-column: 1 / -1;
  padding: 20px;
  border-radius: 20px;
  background: var(--books-card-bg);
  border: 1px dashed var(--books-card-border-color);
  color: var(--books-muted);
  font-size: 0.95rem;
  text-align: center;
  box-shadow: var(--books-card-shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.books-empty::before,
.my-books-empty::before {
  content: "";
  width: 64px;
  height: 64px;
  background-image: var(--books-empty-icon);
  background-repeat: no-repeat;
  background-size: contain;
  margin-bottom: 4px;
  opacity: 0.7;
}

.books-insight {
  margin-top: 18px;
  padding: 18px;
  border-radius: 22px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.85), rgba(255, 255, 255, 0.65));
  border: 1px solid var(--books-card-border-color);
  box-shadow: var(--books-card-shadow);
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  overflow: hidden;
}

.books-insight h3 {
  margin: 0;
  font-size: 1rem;
}

.books-insight::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 90% 0%, rgba(14, 165, 233, 0.2), transparent 60%);
  pointer-events: none;
}


.book-card--skeleton {
  pointer-events: none;
  color: transparent;
}

.book-card--skeleton .book-card__meta {
  gap: 12px;
}

.book-card--skeleton .book-card__link {
  display: none;
}

.book-card--skeleton .book-card__footer {
  align-items: center;
}

.books-activity {
  margin-top: 32px;
  padding: 24px;
  border-radius: 20px;
  background: var(--feed-card-bg);
  border: 1px solid var(--feed-card-border);
  box-shadow: var(--feed-card-shadow);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.books-activity__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}

.books-activity__title {
  margin: 0;
  font-size: 1.15rem;
}

.books-activity__description {
  margin: 6px 0 0;
  font-size: 0.9rem;
  color: var(--feed-muted-color);
}

.books-activity__status {
  font-size: 0.85rem;
  color: var(--feed-muted-color);
}

.books-activity__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.books-activity__item {
  display: flex;
  align-items: stretch;
  gap: 14px;
}

.books-activity__avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
  background: rgba(148, 163, 184, 0.25);
}

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

.books-activity__body {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.books-activity__meta {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--feed-muted-color);
}

.books-activity__user {
  font-weight: 600;
  color: inherit;
  text-decoration: none;
}

.books-activity__user:hover,
.books-activity__user:focus-visible {
  text-decoration: underline;
}

.books-activity__time {
  margin-left: auto;
  color: var(--feed-muted-color);
}

.books-activity__text {
  font-size: 0.95rem;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: baseline;
}

.books-activity__action {
  font-weight: 600;
}

.books-activity__book {
  font-weight: 600;
  color: var(--feed-accent, #6366f1);
  text-decoration: none;
}

.books-activity__book:hover,
.books-activity__book:focus-visible {
  text-decoration: underline;
}

.books-activity__author {
  margin: 0;
  font-size: 0.85rem;
  color: var(--feed-muted-color);
}

.books-activity__rating {
  font-size: 0.85rem;
  color: var(--feed-muted-color);
}

.books-activity__review {
  margin: 0;
  font-size: 0.88rem;
  color: var(--feed-muted-color);
  border-left: 3px solid var(--feed-accent, #6366f1);
  padding-left: 10px;
}

.books-search {
  display: flex;
  flex-direction: column;
  gap: clamp(16px, 3vw, 24px);
  padding: clamp(18px, 3vw, 28px);
  border-radius: 22px;
  background: var(--feed-card-bg);
  border: 1px solid var(--feed-card-border);
  box-shadow: var(--feed-card-shadow);
}

.books-search__header {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.books-search__title {
  margin: 0;
  font-size: clamp(1.4rem, 3vw, 1.85rem);
  line-height: 1.25;
}

.books-search__subtitle {
  margin: 0;
  color: var(--feed-muted-color);
  font-size: 0.95rem;
}

.books-search__form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.books-search__eyebrow {
  margin: 0;
  color: var(--feed-muted-color);
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.books-search__simple {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 14px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(14, 165, 233, 0.08));
  border: 1px solid rgba(99, 102, 241, 0.15);
}

.books-search__query-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 12px;
  align-items: center;
}

.books-search__query-row input {
  font-size: 1rem;
  padding: 12px 14px;
}

.books-search__filters-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  background: rgba(255, 255, 255, 0.7);
  color: inherit;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.books-search__filters-toggle svg {
  width: 20px;
  height: 20px;
}

.books-search__filters-toggle:hover,
.books-search__filters-toggle:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(99, 102, 241, 0.6);
  box-shadow: 0 14px 28px -20px rgba(99, 102, 241, 0.6);
  outline: none;
}

body.dark .books-search__filters-toggle {
  background: rgba(15, 23, 42, 0.7);
  border-color: rgba(99, 102, 241, 0.38);
}

.books-search__filters-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-end;
}

.books-search__filters-panel {
  display: grid;
  gap: 14px;
}

.books-search__filters-panel[hidden] {
  display: none;
}

.books-search__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-left: auto;
}

@media (max-width: 720px) {
  .books-search__query-row {
    grid-template-columns: 1fr;
  }
  .books-search__actions {
    width: 100%;
    justify-content: flex-start;
  }
}

.books-search__simple-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-end;
  justify-content: space-between;
}

.books-search__field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.books-search__field label {
  font-weight: 600;
  font-size: 0.95rem;
}

.books-search__field input,
.books-search__field select {
  border-radius: 14px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  padding: 10px 12px;
  font-size: 0.95rem;
  background: rgba(255, 255, 255, 0.85);
  color: inherit;
}

/* Ensure dropdown options stay readable on light/dark themes. */
.books-main select {
  color: #0f172a;
}

.books-main select option,
.books-main select optgroup {
  color: #0f172a;
  background: #f8fafc;
}

body.dark .books-main select {
  color: #e2e8f0;
}

body.dark .books-main select option,
body.dark .books-main select optgroup {
  color: #e2e8f0;
  background: #0f172a;
}

body.dark .books-search__field input,
body.dark .books-search__field select {
  background: rgba(15, 23, 42, 0.6);
  border-color: rgba(99, 102, 241, 0.38);
}

.books-search__field--query {
  grid-column: 1 / -1;
}

.books-search__field--inline {
  min-width: 180px;
  flex: 1 1 200px;
}

.books-search__field--range .books-search__range-inputs {
  display: flex;
  align-items: center;
  gap: 8px;
}

.books-search__range-separator {
  color: var(--feed-muted-color);
  font-weight: 600;
}

.books-search__hint {
  margin: 0;
  font-size: 0.8rem;
  color: var(--feed-muted-color);
}

.books-search__submit,
.books-search__reset {
  border-radius: 14px;
  padding: 10px 18px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.books-search__cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.books-search__submit {
  border: 1px solid rgba(99, 102, 241, 0.45);
  background: linear-gradient(145deg, rgba(99, 102, 241, 0.2), rgba(14, 165, 233, 0.22));
}

.books-search__reset {
  border: 1px solid rgba(148, 163, 184, 0.45);
  background: transparent;
}

.books-search__submit:hover,
.books-search__submit:focus-visible,
.books-search__reset:hover,
.books-search__reset:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 16px 30px -20px rgba(99, 102, 241, 0.6);
}

.books-search__advanced-toggle {
  border-radius: 14px;
  padding: 10px 16px;
  border: 1px dashed rgba(148, 163, 184, 0.7);
  background: transparent;
  font-weight: 700;
  cursor: pointer;
  color: inherit;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.books-search__advanced-toggle:hover,
.books-search__advanced-toggle:focus-visible {
  border-color: rgba(99, 102, 241, 0.8);
  transform: translateY(-1px);
}

.books-advanced-panel {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 16px;
  border-radius: 14px;
  border: 1px dashed rgba(148, 163, 184, 0.6);
  background: rgba(148, 163, 184, 0.08);
}

.books-advanced-panel[hidden] {
  display: none;
}

.books-search__advanced-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  align-items: end;
}

.books-search__status {
  min-height: 1.4rem;
  font-size: 0.9rem;
  color: var(--feed-muted-color);
}

.books-search__status[data-variant='error'] {
  color: #b42318;
}

body.dark .books-search__status[data-variant='error'] {
  color: #ffb4a6;
}

.books-search__results {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.books-search__results[data-state='idle'] {
  display: none;
}

.books-search__empty {
  margin: 0;
  font-size: 0.95rem;
  color: var(--feed-muted-color);
  padding: 12px 0;
}

.books-search__empty--error {
  color: #b42318;
}

body.dark .books-search__empty--error {
  color: #ffb4a6;
}

.books-search__pagination {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-content: flex-end;
}

.books-search__page-btn {
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  background: transparent;
  padding: 8px 12px;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.books-search__page-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.books-search__page-btn:not(:disabled):hover,
.books-search__page-btn:not(:disabled):focus-visible {
  transform: translateY(-1px);
}

.books-search__page-label {
  font-size: 0.9rem;
  color: var(--feed-muted-color);
}

.book-search-card {
  display: grid;
  grid-template-columns: minmax(0, 120px) minmax(0, 1fr);
  gap: 16px;
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(148, 163, 184, 0.35);
  box-shadow: 0 16px 30px -24px rgba(15, 23, 42, 0.35);
}

body.dark .book-search-card {
  background: rgba(15, 23, 42, 0.65);
  border-color: rgba(99, 102, 241, 0.35);
  box-shadow: 0 18px 32px -28px rgba(14, 165, 233, 0.45);
}

.book-search-card__cover {
  position: relative;
  width: 100%;
  aspect-ratio: 2 / 3;
  border-radius: 12px;
  overflow: hidden;
  background: rgba(148, 163, 184, 0.2);
}

.book-search-card__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.book-search-card__cover--placeholder {
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  font-size: 1.4rem;
  color: rgba(148, 163, 184, 0.85);
  background: rgba(148, 163, 184, 0.2);
}

.book-search-card__body {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.book-search-card__title {
  margin: 0;
  font-size: 1.05rem;
}

.book-search-card__title-link {
  color: inherit;
  text-decoration: none;
}

.book-search-card__title-link:hover,
.book-search-card__title-link:focus-visible {
  text-decoration: underline;
}

.book-search-card__authors {
  margin: 0;
  color: var(--feed-muted-color);
  font-size: 0.9rem;
}

.book-search-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--feed-text-color, #0f172a);
}

.book-search-card__meta span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid rgba(59, 130, 246, 0.28);
  background:
    radial-gradient(circle at 10% 20%, rgba(255, 255, 255, 0.7), transparent 50%),
    linear-gradient(135deg, rgba(99, 102, 241, 0.18), rgba(14, 165, 233, 0.14));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.7),
    0 10px 20px -18px rgba(59, 130, 246, 0.6);
}

body.dark .book-search-card__meta span {
  background:
    radial-gradient(circle at 10% 20%, rgba(96, 165, 250, 0.25), transparent 60%),
    linear-gradient(135deg, rgba(99, 102, 241, 0.28), rgba(14, 165, 233, 0.22));
  border-color: rgba(96, 165, 250, 0.45);
  box-shadow:
    inset 0 1px 0 rgba(99, 102, 241, 0.25),
    0 10px 18px -16px rgba(14, 165, 233, 0.45);
}

body.dark .book-search-card__meta {
  color: rgba(226, 232, 240, 0.92);
}

.book-search-card__meta span::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: linear-gradient(180deg, #60a5fa, #6366f1);
  box-shadow: 0 0 10px rgba(59, 130, 246, 0.65);
}

body.dark .book-search-card__meta span::before {
  background: linear-gradient(180deg, #7dd3fc, #818cf8);
  box-shadow: 0 0 12px rgba(125, 211, 252, 0.75);
}

.book-search-card__actions {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.book-search-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: 999px;
  padding: 8px 14px;
  background: rgba(99, 102, 241, 0.18);
  border: 1px solid rgba(99, 102, 241, 0.35);
  color: inherit;
  font-weight: 600;
  text-decoration: none;
}

.book-search-card__link--ghost {
  background: transparent;
  border-color: rgba(148, 163, 184, 0.4);
}

.book-search-card__link:hover,
.book-search-card__link:focus-visible {
  background: rgba(99, 102, 241, 0.28);
}

.book-search-card__shelf-select {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: 999px;
  padding: 8px 14px;
  background: rgba(99, 102, 241, 0.18);
  border: 1px solid rgba(99, 102, 241, 0.35);
  color: inherit;
  font-weight: 600;
  cursor: pointer;
  width: auto;
  max-width: 100%;
  min-width: 0;
  flex: 0 1 auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  box-sizing: border-box;
}

.book-search-card__shelf-select:hover,
.book-search-card__shelf-select:focus-visible {
  background: rgba(99, 102, 241, 0.28);
}

.book-search-card__shelf-select.is-shelf-active {
  border-color: color-mix(in srgb, var(--books-accent) 70%, transparent);
  background: color-mix(in srgb, var(--books-accent) 18%, var(--books-card-bg) 82%);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--books-accent) 20%, transparent);
}

.book-search-card__shelf-quick {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: 999px;
  padding: 8px 14px;
  background: transparent;
  border: 1px solid rgba(148, 163, 184, 0.4);
  color: inherit;
  font-weight: 600;
  cursor: pointer;
}

.book-search-card__shelf-quick:hover,
.book-search-card__shelf-quick:focus-visible {
  background: rgba(99, 102, 241, 0.18);
  border-color: rgba(99, 102, 241, 0.6);
  outline: none;
}

.book-search-card__shelf-quick.is-shelf-active {
  border-color: color-mix(in srgb, var(--books-accent) 70%, transparent);
  background: color-mix(in srgb, var(--books-accent) 22%, var(--books-card-bg) 78%);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--books-accent) 20%, transparent);
}

.book-search-card--skeleton {
  position: relative;
}

.book-search-card--skeleton .book-search-card__body {
  gap: 10px;
}

@media (max-width: 720px) {
  .books-search__form {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  }

  .book-search-card {
    grid-template-columns: minmax(0, 90px) minmax(0, 1fr);
  }

  .books-grid .book-card {
    grid-template-columns: minmax(0, 90px) minmax(0, 1fr);
  }
}

.books-activity__cover {
  width: 64px;
  aspect-ratio: 3 / 4;
  border-radius: 12px;
  overflow: hidden;
  flex-shrink: 0;
  background: rgba(148, 163, 184, 0.2);
}

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

.books-activity__empty {
  margin: 0;
  font-size: 0.9rem;
  color: var(--feed-muted-color);
}

.books-activity__more {
  align-self: flex-start;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--feed-card-border);
  background: transparent;
  color: inherit;
  font-weight: 600;
  cursor: pointer;
}

.books-activity__more:hover,
.books-activity__more:focus-visible {
  border-color: var(--feed-accent, #6366f1);
  color: var(--feed-accent, #6366f1);
}

.books-activity__more[disabled] {
  cursor: progress;
  opacity: 0.6;
}

@media (max-width: 720px) {
  .books-activity {
    padding: 20px;
  }

  .books-activity__item {
    align-items: flex-start;
  }

  .books-activity__cover {
    display: none;
  }
}

.skeleton-block {
  position: relative;
  display: block;
  overflow: hidden;
  background: rgba(148, 163, 184, 0.2);
  border-radius: 10px;
}

body.dark .skeleton-block {
  background: rgba(99, 102, 241, 0.22);
}

.skeleton-block::after {
  content: "";
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, rgba(148, 163, 184, 0), rgba(148, 163, 184, 0.25), rgba(148, 163, 184, 0));
  animation: booksShimmer 1.4s infinite;
}

.skeleton-block--cover {
  width: 100%;
  aspect-ratio: 3 / 4;
  border-radius: 12px;
}

.skeleton-block--title {
  height: 18px;
  width: 80%;
}

.skeleton-block--text {
  height: 14px;
  width: 60%;
}

.skeleton-block--text-short {
  width: 40%;
}

.skeleton-progress {
  display: block;
}

.skeleton-block--bar {
  display: block;
  height: 6px;
  width: 100%;
  border-radius: 999px;
}

.skeleton-block--avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
}

.skeleton-block--pill {
  width: 74px;
  height: 16px;
  border-radius: 999px;
  margin-left: auto;
}

@keyframes booksShimmer {
  from {
    transform: translateX(-100%);
  }
  to {
    transform: translateX(100%);
  }
}

@media (max-width: 960px) {
  .books-hero {
    grid-template-columns: 1fr;
  }

  .books-filter-actions {
    grid-column: 1 / -1;
    justify-content: flex-start;
    flex-wrap: wrap;
  }
}

@media (max-width: 720px) {
  .books-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
}

@media (max-width: 640px) {
  .books-tag-input {
    flex-wrap: wrap;
  }

  .books-tag-input button {
    width: 100%;
  }

  .books-filter-actions {
    gap: 8px;
  }

  .books-filter-actions .books-filter-button {
    flex: 1 1 auto;
  }
}

@media (max-width: 560px) {
  .books-section {
    padding: 16px;
  }

  .books-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .books-section,
  .book-card,
  .my-book-card,
  .books-filter-button,
  .reading-challenge,
  .reading-challenge__progress-fill,
  .my-book-card__progress-fill,
  .book-card__progress-fill {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

.reading-challenge-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: clamp(16px, 2.5vw, 20px);
  border-radius: 18px;
  background: var(--books-card-bg);
  border: 1px solid var(--books-card-border-color);
  box-shadow: var(--books-card-shadow);
}

.reading-challenge-cta__eyebrow {
  margin: 0 0 4px;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--books-muted);
}

.reading-challenge-cta__title {
  margin: 0;
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
}

.reading-challenge-cta__body {
  margin: 6px 0 0;
  color: var(--books-muted);
}

.reading-challenge-cta__link {
  align-self: center;
  padding: 10px 16px;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(99, 102, 241, 0.2));
  color: var(--books-text-primary);
  font-weight: 700;
  border: 1px solid var(--books-card-border-color);
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.reading-challenge-cta__link:hover,
.reading-challenge-cta__link:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.15);
  border-color: rgba(99, 102, 241, 0.3);
}

.reading-challenge-page {
  min-height: 100vh;
}

.reading-challenge-page__main {
  max-width: 980px;
  margin: 32px auto 64px;
  padding: 0 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.reading-challenge-page__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  padding: clamp(16px, 2.5vw, 20px);
  border-radius: 18px;
  background: var(--books-card-bg);
  border: 1px solid var(--books-card-border-color);
  box-shadow: var(--books-card-shadow);
}

.reading-challenge-page__eyebrow {
  margin: 0 0 6px;
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--books-muted);
}

.reading-challenge-page__title {
  margin: 0;
  font-size: clamp(1.4rem, 3vw, 1.8rem);
}

.reading-challenge-page__body {
  margin: 8px 0 0;
  color: var(--books-muted);
}

.reading-challenge-page__back {
  align-self: center;
  padding: 10px 14px;
  border-radius: 12px;
  background: var(--books-surface);
  border: 1px solid var(--books-card-border-color);
  color: var(--books-text-primary);
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.reading-challenge-page__back:hover,
.reading-challenge-page__back:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
  border-color: rgba(99, 102, 241, 0.35);
}

.reading-challenge-page .reading-challenge {
  margin-top: 4px;
}

@media (max-width: 720px) {
  .reading-challenge-cta,
  .reading-challenge-page__header {
    flex-direction: column;
    align-items: flex-start;
  }

  .reading-challenge-cta__link,
  .reading-challenge-page__back {
    width: 100%;
    text-align: center;
  }
}

.reading-challenge {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: clamp(18px, 3vw, 24px);
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.18), rgba(14, 165, 233, 0.1)), var(--books-card-bg);
  border: 1px solid var(--books-card-border-color);
  box-shadow: var(--books-card-shadow);
  overflow: hidden;
}

.reading-challenge__toggle {
  align-self: flex-start;
  margin: 6px 0 12px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px dashed var(--books-card-border-color);
  background: var(--books-card-bg);
  color: var(--books-muted);
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.reading-challenge__toggle:hover,
.reading-challenge__toggle:focus-visible {
  border-color: rgba(99, 102, 241, 0.5);
  color: var(--books-text-primary);
}

.reading-challenge::before {
  content: "";
  position: absolute;
  width: 140px;
  height: 140px;
  top: -30px;
  right: -30px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.25), rgba(14, 165, 233, 0.15));
  border-radius: 24px;
  transform: rotate(18deg);
  opacity: 0.7;
  pointer-events: none;
}

.reading-challenge::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 0% 0%, rgba(255, 255, 255, 0.4), transparent 50%);
  pointer-events: none;
}

.reading-challenge--sidebar {
  margin-top: 20px;
}

.reading-challenge__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.reading-challenge__eyebrow {
  margin: 0 0 4px;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--books-muted);
}

.reading-challenge__title {
  margin: 0;
  font-size: 1.3rem;
  line-height: 1.25;
}

.reading-challenge__edit {
  border: 1px solid rgba(99, 102, 241, 0.5);
  border-radius: 999px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.9);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

body.dark .reading-challenge__edit {
  background: rgba(15, 23, 42, 0.85);
}

.reading-challenge__edit:hover,
.reading-challenge__edit:focus-visible {
  transform: translateY(-1px);
}

.reading-challenge__status {
  margin: 0;
  font-size: 0.95rem;
  color: var(--books-muted);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.reading-challenge__status::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--books-accent);
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.4);
}

.reading-challenge__status[data-variant="success"] {
  color: #4ade80;
}

.reading-challenge__status[data-variant="success"]::before {
  background: #4ade80;
  box-shadow: 0 0 12px rgba(74, 222, 128, 0.5);
}

.reading-challenge__status[data-variant="error"] {
  color: #f87171;
}

.reading-challenge__status[data-variant="error"]::before {
  background: #f87171;
  box-shadow: 0 0 12px rgba(248, 113, 113, 0.5);
}

.reading-challenge__status[data-variant="info"] {
  color: #7dd3fc;
}

.reading-challenge__status[data-variant="info"]::before {
  background: #7dd3fc;
  box-shadow: 0 0 12px rgba(125, 211, 252, 0.5);
}

.reading-challenge__progress {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.reading-challenge__progress-bar {
  width: 100%;
  height: 12px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.35);
  overflow: hidden;
}

.reading-challenge__progress-fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #6366f1, #14b8a6);
  box-shadow: 0 0 12px rgba(14, 165, 233, 0.4);
  transition: width 0.4s ease;
}

.reading-challenge__progress-labels {
  display: flex;
  justify-content: space-between;
  font-weight: 600;
  font-size: 0.9rem;
}

.reading-challenge__covers {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(56px, 1fr));
  gap: 8px;
  padding: 8px;
  border-radius: 16px;
  background: rgba(148, 163, 184, 0.1);
}

.reading-challenge__cover {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(15, 23, 42, 0.08);
  border: 1px solid rgba(148, 163, 184, 0.3);
  height: 80px;
  overflow: hidden;
  text-decoration: none;
  font-size: 1.4rem;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.reading-challenge__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.reading-challenge__form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.reading-challenge__form-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.reading-challenge__input {
  flex: 1;
  min-width: 120px;
  border-radius: 14px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  padding: 10px 12px;
  font-size: 1rem;
}

.reading-challenge__save {
  border-radius: 999px;
  border: none;
  padding: 10px 18px;
  background: linear-gradient(135deg, #6366f1, #14b8a6);
  color: white;
  font-weight: 600;
  cursor: pointer;
}

.reading-challenge__cancel {
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  padding: 10px 18px;
  background: transparent;
  font-weight: 600;
  cursor: pointer;
}

.reading-challenge__clear {
  border: none;
  background: none;
  color: var(--books-muted);
  text-decoration: underline;
  align-self: flex-start;
  padding: 0;
  font-size: 0.85rem;
  cursor: pointer;
}

.reading-challenge__footnote,
.reading-challenge__form-help {
  margin: 0;
  font-size: 0.85rem;
  color: var(--books-muted);
}

.reading-challenge[data-loading="true"] {
  opacity: 0.92;
}

.reading-challenge[data-loading="true"]::after {
  background: linear-gradient(90deg, rgba(148, 163, 184, 0) 0%, rgba(148, 163, 184, 0.35) 50%, rgba(148, 163, 184, 0) 100%);
  animation: booksShimmer 1.8s linear infinite;
}

.my-books-tabset {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 28px 0 8px;
}

.my-books-tab {
  border: 1px solid rgba(148, 163, 184, 0.4);
  padding: 8px 18px;
  border-radius: 999px;
  background: transparent;
  color: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.my-books-tab.is-active {
  border-color: rgba(99, 102, 241, 0.6);
  background: rgba(99, 102, 241, 0.15);
}

.book-lists-panel {
  margin-top: 24px;
  border-radius: 24px;
  padding: clamp(18px, 3vw, 28px);
  background: var(--feed-card-bg);
  border: 1px solid rgba(148, 163, 184, 0.25);
  box-shadow: var(--feed-card-shadow);
}

.book-lists-panel__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 18px;
  margin-bottom: 18px;
}

.book-lists-panel__eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.75rem;
  color: var(--feed-muted-color);
}

.book-lists-panel__action {
  border-radius: 999px;
  border: 1px solid rgba(99, 102, 241, 0.5);
  padding: 8px 18px;
  background: rgba(99, 102, 241, 0.18);
  font-weight: 600;
  cursor: pointer;
}

.book-lists-panel__status[data-variant="error"] {
  color: #ef4444;
}

.book-lists-panel__status[data-variant="warning"] {
  color: #f59e0b;
}

.book-lists-grid {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}

.book-list-card {
  border: 1px solid rgba(148, 163, 184, 0.3);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.9);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

body.dark .book-list-card {
  background: rgba(15, 23, 42, 0.7);
  border-color: rgba(99, 102, 241, 0.35);
}

.book-list-card__header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.book-list-card__description {
  margin: 6px 0 0;
  color: var(--feed-muted-color);
}

.book-list-card__preview {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.book-list-card__preview img {
  width: 100%;
  aspect-ratio: 3 / 4.5;
  object-fit: cover;
  border-radius: 12px;
}

.book-list-card__preview--empty,
.book-list-card__empty {
  padding: 16px;
  border: 1px dashed rgba(148, 163, 184, 0.5);
  border-radius: 16px;
  color: var(--feed-muted-color);
  text-align: center;
}

.book-list-card__visibility {
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  font-size: 0.85rem;
}

.book-list-card__footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.book-list-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.book-list-card__actions button,
.book-list-card__actions a {
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  padding: 6px 14px;
  background: transparent;
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  color: inherit;
}

.book-list-dialog {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 1100;
}

.book-list-dialog[hidden] {
  display: none;
}

.book-list-dialog__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(6px);
}

.book-list-dialog__panel {
  position: relative;
  background: var(--feed-card-bg);
  border-radius: 24px;
  border: 1px solid rgba(148, 163, 184, 0.3);
  padding: clamp(18px, 4vw, 32px);
  width: min(420px, 100%);
  max-height: 90vh;
  overflow: auto;
  box-shadow: var(--feed-card-shadow);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.book-list-dialog__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.book-list-dialog__eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.75rem;
  color: var(--feed-muted-color);
}

.book-list-dialog__subtitle {
  margin: 4px 0 0;
  color: var(--feed-muted-color);
}

.book-list-dialog__close {
  border: none;
  background: transparent;
  font-size: 1.25rem;
  cursor: pointer;
}

.book-list-dialog__lists {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.book-list-dialog__list {
  border: 1px solid rgba(148, 163, 184, 0.4);
  border-radius: 14px;
  padding: 10px 14px;
  text-align: left;
  background: transparent;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.book-list-dialog__list.is-selected {
  border-color: rgba(99, 102, 241, 0.65);
  background: rgba(99, 102, 241, 0.15);
}

.book-list-dialog__form {
  border-top: 1px solid rgba(148, 163, 184, 0.2);
  padding-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.book-list-dialog__form-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.9rem;
}

.book-list-dialog__form input,
.book-list-dialog__form select {
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  padding: 8px 12px;
  font-size: 1rem;
}

.book-list-dialog__submit {
  border-radius: 12px;
  padding: 10px 16px;
  border: 1px solid rgba(99, 102, 241, 0.6);
  background: rgba(99, 102, 241, 0.18);
  font-weight: 600;
  cursor: pointer;
}

.book-list-dialog__hint {
  font-size: 0.85rem;
  color: var(--feed-muted-color);
}

.book-list-hero {
  position: relative;
  border-radius: 28px;
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--books-card-border-color);
  background: linear-gradient(120deg, rgba(99, 102, 241, 0.12), rgba(14, 165, 233, 0.08)), var(--books-card-bg);
  box-shadow: var(--books-card-shadow);
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow: hidden;
}

.book-list-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 0%, rgba(14, 165, 233, 0.22), transparent 60%);
  pointer-events: none;
}

.book-list-hero__meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  font-weight: 600;
}

.book-list-hero__owner {
  display: flex;
  align-items: center;
  gap: 12px;
}

.book-list-hero__owner img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
}

.book-list-hero__actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.book-list-hero__actions button {
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  padding: 8px 16px;
  background: transparent;
  cursor: pointer;
  font-weight: 600;
}

.book-list-hero__danger {
  border-color: rgba(239, 68, 68, 0.6);
  color: #ef4444;
}

/* --- Book detail -------------------------------------------------------- */

.book-detail {
  display: grid;
  grid-template-columns: minmax(220px, 320px) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  padding: clamp(20px, 3vw, 34px);
  border-radius: 30px;
  background: var(--books-card-bg);
  border: 1px solid var(--books-card-border-color);
  box-shadow: var(--books-card-shadow);
}

.book-detail__cover {
  border-radius: 22px;
  border: 1px solid var(--books-card-border-color);
  background: rgba(15, 23, 42, 0.4);
  display: grid;
  place-items: center;
  overflow: hidden;
  min-height: 280px;
}

.book-detail__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.book-detail__content h1 {
  font-size: clamp(1.7rem, 2.8vw, 2.4rem);
  margin: 0 0 6px;
}

.book-detail__content p {
  margin: 0 0 10px;
}

.book-detail__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  font-size: 0.95rem;
  color: var(--books-muted);
  margin: 10px 0 16px;
}

.book-detail__facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px 18px;
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid rgba(148, 163, 184, 0.2);
}

.book-detail__facts dt {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--books-muted);
}

.book-detail__facts dd {
  margin: 6px 0 0;
  font-weight: 600;
}

.book-detail__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.book-detail__actions button,
.book-detail__actions a {
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  padding: 8px 16px;
  background: transparent;
  color: inherit;
  text-decoration: none;
  font-weight: 600;
  cursor: pointer;
}

.book-detail__actions button:hover,
.book-detail__actions a:hover {
  border-color: rgba(148, 163, 184, 0.8);
}

.book-detail__panel,
.book-detail__reviews {
  margin-top: clamp(24px, 4vw, 36px);
  padding: clamp(18px, 3vw, 28px);
  border-radius: 24px;
  background: var(--books-card-bg);
  border: 1px solid var(--books-card-border-color);
  box-shadow: var(--books-card-shadow);
}

.book-detail__panel h2,
.book-detail__reviews h2 {
  margin: 0 0 14px;
}

.book-detail__panel label {
  display: block;
  font-weight: 600;
  margin: 12px 0 6px;
}

.book-detail__panel select,
.book-detail__panel input,
.book-detail__panel textarea {
  width: 100%;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.35);
  padding: 10px 12px;
  background: rgba(15, 23, 42, 0.2);
  color: inherit;
}

.book-detail__rating {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.review-card {
  display: flex;
  gap: 14px;
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid rgba(148, 163, 184, 0.25);
  background: rgba(15, 23, 42, 0.2);
  margin-bottom: 12px;
}

.review-card__avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  object-fit: cover;
}

.review-card__header {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  align-items: center;
}

.review-card__user {
  font-weight: 700;
  color: var(--books-accent);
  text-decoration: none;
}

.review-card__badge {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(34, 197, 94, 0.2);
  color: #22c55e;
}

.review-card__rating {
  font-weight: 600;
}

.review-card__meta {
  color: var(--books-muted);
  font-size: 0.85rem;
}

.review-card__body {
  margin: 8px 0 0;
}

.book-detail__rating-input {
  width: 72px;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  padding: 6px 10px;
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
}

.book-detail__rating-stars {
  display: inline-flex;
  gap: 6px;
  align-items: center;
}

.book-detail__rating-star {
  border: none;
  background: none;
  font-size: 1.35rem;
  color: rgba(148, 163, 184, 0.6);
  cursor: pointer;
  transition: transform 0.2s ease, color 0.2s ease;
}

.book-detail__rating-star.is-active,
.book-detail__rating-star:hover,
.book-detail__rating-star:focus-visible {
  color: #facc15;
  transform: translateY(-1px);
}

.book-detail__char-counter {
  font-size: 0.85rem;
  color: var(--books-muted);
  text-align: right;
}

.book-detail__owner-link {
  font-weight: 600;
  color: var(--books-accent);
  text-decoration: none;
}

.book-detail__owner-link:hover,
.book-detail__owner-link:focus-visible {
  text-decoration: underline;
}

@media (max-width: 960px) {
  .book-detail {
    grid-template-columns: 1fr;
  }
}

.book-list-status[data-variant="error"] {
  color: #ef4444;
}

.book-list-status[data-variant="success"] {
  color: #16a34a;
}
body.book-list-dialog-open { overflow: hidden; }

/* --- Lux Noir theme ---------------------------------------------------- */

body.books-surface.lux-noir {

  --feed-card-bg: var(--lux-panel);
  --feed-card-border: var(--lux-border);
  --feed-muted-color: var(--lux-muted);
  --feed-accent: var(--lux-accent);
  --text-color: var(--lux-text);
  --lux-bg: #0b0b0f;
  --lux-panel: rgba(18, 18, 24, 0.92);
  --lux-panel-soft: rgba(18, 18, 24, 0.7);
  --lux-border: rgba(214, 178, 105, 0.25);
  --lux-muted: rgba(226, 222, 212, 0.72);
  --lux-text: #f3efe7;
  --lux-accent: #d6b269;
  --lux-accent-strong: #f0c776;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(90, 74, 44, 0.35), transparent 60%),
    radial-gradient(900px 480px at 90% -20%, rgba(40, 32, 20, 0.4), transparent 55%),
    linear-gradient(160deg, #0a0a0e 0%, #111119 60%, #0b0b0f 100%);
  color: var(--lux-text);
  font-family: "Space Grotesk", "Trebuchet MS", sans-serif;
}

body.books-surface.lux-noir h1,
body.books-surface.lux-noir h2,
body.books-surface.lux-noir h3,
body.books-surface.lux-noir .books-hero__title {
  font-family: "Cormorant Garamond", "Times New Roman", serif;
  letter-spacing: 0.02em;
}

body.books-surface.lux-noir .book-detail,
body.books-surface.lux-noir .book-detail__panel,
body.books-surface.lux-noir .book-detail__reviews {
  background: var(--lux-panel);
  border-color: var(--lux-border);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

body.books-surface.lux-noir .book-detail__cover {
  background: radial-gradient(circle at 40% 20%, rgba(214, 178, 105, 0.08), transparent 55%),
    linear-gradient(180deg, rgba(18, 18, 24, 0.9) 0%, rgba(12, 12, 18, 0.98) 100%);
  border-color: var(--lux-border);
}

body.books-surface.lux-noir .book-detail__meta,
body.books-surface.lux-noir .book-detail__facts dt,
body.books-surface.lux-noir .review-card__meta {
  color: var(--lux-muted);
}

body.books-surface.lux-noir .book-detail__facts {
  border-top-color: rgba(214, 178, 105, 0.18);
}

body.books-surface.lux-noir .book-detail__actions button,
body.books-surface.lux-noir .book-detail__actions a {
  border-color: rgba(214, 178, 105, 0.5);
  color: var(--lux-text);
  background: rgba(15, 12, 8, 0.35);
}

body.books-surface.lux-noir .book-detail__actions button:hover,
body.books-surface.lux-noir .book-detail__actions a:hover {
  border-color: var(--lux-accent-strong);
  color: var(--lux-accent-strong);
}

body.books-surface.lux-noir .book-detail__panel select,
body.books-surface.lux-noir .book-detail__panel input,
body.books-surface.lux-noir .book-detail__panel textarea {
  background: var(--lux-panel-soft);
  border-color: rgba(214, 178, 105, 0.35);
  color: var(--lux-text);
}

body.books-surface.lux-noir .book-detail__owner-link,
body.books-surface.lux-noir .review-card__user {
  color: var(--lux-accent);
}

body.books-surface.lux-noir .review-card {
  background: rgba(15, 12, 10, 0.45);
  border-color: rgba(214, 178, 105, 0.2);
}

body.books-surface.lux-noir .review-card__badge {
  background: rgba(214, 178, 105, 0.18);
  color: var(--lux-accent-strong);
}

body.books-surface.lux-noir .book-detail__rating-star.is-active,
body.books-surface.lux-noir .book-detail__rating-star:hover,
body.books-surface.lux-noir .book-detail__rating-star:focus-visible {
  color: var(--lux-accent-strong);
}


body.books-surface.lux-noir .sidebar,
body.books-surface.lux-noir .right-sidebar {
  background: linear-gradient(160deg, rgba(24, 18, 10, 0.78), rgba(10, 14, 22, 0.92))
    var(--lux-panel);
  border-color: var(--lux-border);
  box-shadow: 0 28px 54px -34px rgba(0, 0, 0, 0.7);
  color: var(--lux-text);
}

body.books-surface.lux-noir .sidebar .icon,
body.books-surface.lux-noir .right-sidebar .icon {
  background: rgba(18, 14, 10, 0.7);
  border: 1px solid rgba(214, 178, 105, 0.2);
}

body.books-surface.lux-noir .sidebar .icon:hover,
body.books-surface.lux-noir .right-sidebar .icon:hover {
  background: rgba(214, 178, 105, 0.16);
  border-color: rgba(214, 178, 105, 0.45);
}

body.books-surface.lux-noir .sidebar-section-heading {
  color: var(--lux-muted);
}

/* --- Right sidebar dropdown -------------------------------------------- */

.right-sidebar-dropdown {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.right-sidebar-dropdown > summary {
  list-style: none;
}

.right-sidebar-dropdown > summary::-webkit-details-marker {
  display: none;
}

.right-sidebar-dropdown__summary {
  cursor: pointer;
}

.right-sidebar-dropdown__caret {
  margin-left: auto;
  font-size: 0.75rem;
  opacity: 0.7;
  transition: transform 0.2s ease;
}

.right-sidebar-dropdown[open] .right-sidebar-dropdown__caret {
  transform: rotate(180deg);
}

.right-sidebar-dropdown__menu {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-left: 16px;
}

.right-sidebar-dropdown__item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 12px;
  background: rgba(148, 163, 184, 0.08);
  color: var(--text-color);
  font-weight: 600;
  text-decoration: none;
  font-size: 0.92rem;
  transition: background 0.2s ease, transform 0.2s ease;
}

.right-sidebar-dropdown__item:hover,
.right-sidebar-dropdown__item:focus-visible {
  background: rgba(99, 102, 241, 0.16);
  transform: translateX(2px);
  outline: none;
}

.right-sidebar-dropdown__item-icon {
  width: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.right-sidebar.collapsed .right-sidebar-dropdown__menu {
  display: none;
}

.right-sidebar.collapsed .right-sidebar-dropdown__caret {
  opacity: 0;
}