:root {
  --bg: #f2ebdd;
  --bg-accent: #efe4d2;
  --panel: rgba(255, 251, 244, 0.8);
  --panel-strong: #fffaf0;
  --ink: #231a12;
  --muted: #6c5a49;
  --line: rgba(73, 51, 32, 0.16);
  --accent: #9f4f2d;
  --accent-deep: #6c2f1b;
  --accent-soft: rgba(159, 79, 45, 0.12);
  --success: #2f6c45;
  --shadow: 0 24px 80px rgba(78, 49, 26, 0.14);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --sans: "Avenir Next", "Segoe UI", sans-serif;
  --serif: "Baskerville", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  --mono: "SFMono-Regular", "Menlo", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(173, 109, 63, 0.15), transparent 30%),
    radial-gradient(circle at top right, rgba(66, 106, 77, 0.14), transparent 28%),
    linear-gradient(180deg, #f8f3e9 0%, var(--bg) 48%, #efe2cf 100%);
  font-family: var(--sans);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(46, 32, 18, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 32, 18, 0.03) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
  opacity: 0.35;
}

.page-shell {
  position: relative;
  z-index: 1;
  width: min(1380px, calc(100vw - 32px));
  margin: 16px auto 40px;
}

.hero,
.filters-panel,
.table-panel,
.detail-panel,
.stat-card {
  background: var(--panel);
  backdrop-filter: blur(16px);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
  gap: 18px;
  padding: 18px 22px;
  border-radius: var(--radius-lg);
  align-items: start;
}

.hero-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.eyebrow {
  margin: 0 0 4px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-size: 0.72rem;
  color: var(--accent-deep);
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--serif);
  line-height: 0.98;
}

h1 {
  font-size: clamp(1.55rem, 2.6vw, 2.4rem);
  max-width: 20ch;
  line-height: 1.02;
}

h2 {
  font-size: clamp(1.6rem, 2.6vw, 2.4rem);
}

h3 {
  font-size: 1.15rem;
}

.inline-detail-title {
  margin: 6px 0 0;
  font-family: var(--serif);
  font-size: 1.05rem;
  line-height: 1.15;
}

.hero-text,
.panel-copy,
.detail-placeholder p,
.history-item p,
.metric-caption,
#health-meta,
#freshness-meta {
  color: var(--muted);
}

.hero-text {
  max-width: 72ch;
  margin: 6px 0 0;
  font-size: 0.92rem;
  line-height: 1.35;
}

.hero-actions,
.filters-actions,
.pagination-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 14px;
}

.language-switcher {
  display: inline-flex;
  padding: 4px;
  border-radius: 999px;
  background: rgba(255, 250, 240, 0.8);
  border: 1px solid rgba(73, 51, 32, 0.16);
}

.lang-button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 6px 12px;
  border-radius: 999px;
  font: 600 0.82rem/1 var(--sans);
  cursor: pointer;
  transition: background-color 180ms ease, color 180ms ease;
}

.lang-button.active {
  background: var(--accent);
  color: #fff8f2;
}

.primary-button,
.secondary-button,
.ghost-button {
  appearance: none;
  border: 0;
  border-radius: 999px;
  padding: 9px 15px;
  font: inherit;
  text-decoration: none;
  cursor: pointer;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

.primary-button {
  background: var(--accent);
  color: #fff8f2;
}

.secondary-button,
.ghost-button {
  background: transparent;
  color: var(--ink);
  border: 1px solid rgba(73, 51, 32, 0.2);
}

.primary-button:hover,
.secondary-button:hover,
.ghost-button:hover {
  transform: translateY(-1px);
}

.danger-button {
  border-color: rgba(140, 42, 34, 0.34);
  color: #8a2f24;
}

.danger-button:hover {
  background: rgba(140, 42, 34, 0.08);
}

.clear-data-guard {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.clear-data-guard-form {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.clear-data-guard-form input {
  min-width: 112px;
  width: 112px;
  border-radius: 999px;
  border: 1px solid rgba(140, 42, 34, 0.34);
  background: rgba(255, 251, 245, 0.96);
  padding: 9px 14px;
  color: var(--ink);
  font: inherit;
}

.clear-data-guard-error {
  color: #8a2f24;
  font-size: 0.8rem;
  line-height: 1.2;
}

.meta-filter-link {
  appearance: none;
  border: 0;
  padding: 0;
  background: transparent;
  color: var(--accent-deep);
  font: inherit;
  text-align: left;
  cursor: pointer;
  text-decoration: underline;
  text-decoration-style: dotted;
  text-underline-offset: 2px;
}

.meta-filter-link:hover {
  color: var(--accent);
}

.hero-status {
  display: grid;
  gap: 10px;
  align-content: start;
}

.status-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.6), rgba(255, 245, 231, 0.78));
  border: 1px solid var(--line);
}

.status-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.status-card strong {
  font-size: 0.98rem;
  line-height: 1.1;
}

#health-meta,
#freshness-meta {
  font-size: 0.8rem;
  line-height: 1.25;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 14px;
}

.stat-card {
  padding: 18px;
  border-radius: var(--radius-md);
  min-height: 150px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.stat-value {
  font: 700 clamp(1.8rem, 4vw, 3rem) / 1 var(--serif);
}

.metric-caption {
  font-size: 0.92rem;
  line-height: 1.5;
}

.filters-panel,
.table-panel,
.detail-panel {
  border-radius: var(--radius-lg);
}

.filters-panel {
  margin-top: 20px;
  padding: 24px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: end;
  margin-bottom: 20px;
}

.filters-form {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 14px;
}

.filters-form label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--muted);
}

.filters-form input,
.filters-form select {
  width: 100%;
  border-radius: 14px;
  border: 1px solid rgba(73, 51, 32, 0.18);
  background: rgba(255, 251, 245, 0.95);
  padding: 12px 14px;
  color: var(--ink);
  font: inherit;
}

.filters-form textarea,
.niche-form textarea,
.niche-form select,
.niche-form input {
  width: 100%;
  border-radius: 14px;
  border: 1px solid rgba(73, 51, 32, 0.18);
  background: rgba(255, 251, 245, 0.95);
  padding: 12px 14px;
  color: var(--ink);
  font: inherit;
}

.filters-form select[multiple],
.niche-form select[multiple] {
  min-height: 180px;
}

.checkbox-field {
  justify-content: flex-end;
}

.checkbox-field input {
  width: 20px;
  height: 20px;
}

.filters-actions {
  align-items: end;
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(320px, 0.85fr);
  gap: 20px;
  margin-top: 20px;
}

.route-nav {
  display: flex;
  gap: 12px;
  margin-top: 18px;
}

.route-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 108px;
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid rgba(73, 51, 32, 0.2);
  background: rgba(255, 251, 244, 0.7);
  color: var(--ink);
  text-decoration: none;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

.route-link.active {
  background: var(--accent);
  color: #fff8f2;
  border-color: transparent;
}

.route-link:hover {
  transform: translateY(-1px);
}

.single-column {
  grid-template-columns: 1fr;
}

.niche-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 24px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.niche-form label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--muted);
}

.full-span {
  grid-column: 1 / -1;
}

.panel-head.compact {
  grid-column: 1 / -1;
  margin-bottom: 0;
}

.table-panel,
.detail-panel {
  padding: 24px;
}

.table-wrap {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 252, 247, 0.78);
}

.books-table-wrap {
  position: relative;
  overflow-x: auto;
  overflow-y: visible;
}

.table-scrollbar-top {
  display: none;
  overflow-x: auto;
  overflow-y: hidden;
  margin-bottom: 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 252, 247, 0.92);
  scrollbar-width: thin;
}

.table-scrollbar-top.active {
  display: block;
  position: sticky;
  top: 0;
  z-index: 5;
}

.table-scrollbar-top > div {
  height: 10px;
}

.books-sticky-header {
  display: none;
  position: fixed;
  top: 12px;
  left: 0;
  z-index: 20;
  border: 1px solid var(--line);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  background: rgba(255, 252, 247, 0.98);
  box-shadow: 0 12px 32px rgba(78, 49, 26, 0.16);
  backdrop-filter: blur(14px);
}

.books-sticky-header.active {
  display: block;
}

.books-sticky-header-scroll {
  overflow-x: auto;
  overflow-y: hidden;
}

.books-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  min-width: 980px;
}

.books-table th,
.books-table td {
  padding: 14px 16px;
  border-bottom: 1px solid rgba(73, 51, 32, 0.08);
  text-align: left;
  vertical-align: top;
}

.books-table th {
  background: rgba(245, 235, 218, 0.96);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  box-shadow: inset 0 -1px 0 rgba(73, 51, 32, 0.1);
}

.books-table tr:hover td {
  background: rgba(159, 79, 45, 0.05);
}

.books-table tr[data-asin] {
  cursor: pointer;
}

.books-table tr[data-asin]:focus-visible td {
  outline: 2px solid rgba(159, 79, 45, 0.32);
  outline-offset: -2px;
  background: rgba(159, 79, 45, 0.06);
}

.book-title {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.book-title strong {
  font-size: 1rem;
  font-family: var(--serif);
}

.book-title span,
.asin-link,
.mono-chip,
.detail-meta dd {
  font-family: var(--mono);
}

.asin-link {
  color: var(--muted);
  font-size: 0.84rem;
  text-decoration: underline;
  text-decoration-color: rgba(73, 51, 32, 0.28);
  text-underline-offset: 2px;
}

.asin-link:hover {
  color: var(--ink);
  text-decoration-color: currentColor;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-size: 0.78rem;
  white-space: nowrap;
}

.pill-link {
  text-decoration: none;
}

.pill-link:hover {
  filter: brightness(0.97);
  text-decoration: underline;
}

.keyword-search-link {
  color: var(--accent-deep);
  text-decoration: none;
}

.keyword-search-link:hover {
  text-decoration: underline;
}

.pill.success {
  background: rgba(47, 108, 69, 0.12);
  color: var(--success);
}

.pill.ranking-badge.bestseller {
  background: rgba(167, 119, 25, 0.14);
  color: #8b5b00;
}

.pill.ranking-badge.movers {
  background: rgba(188, 78, 55, 0.12);
  color: #a13b22;
}

.pill.ranking-badge.hot-new {
  background: rgba(63, 112, 84, 0.12);
  color: #2f6c45;
}

.row-action {
  white-space: nowrap;
  cursor: default;
}

.table-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 14px;
}

.detail-panel {
  min-height: 780px;
  position: sticky;
  top: 16px;
  align-self: start;
}

#detail-title {
  font-size: clamp(1.2rem, 1.7vw, 1.6rem);
  line-height: 1.08;
}

.detail-placeholder {
  display: grid;
  place-items: center;
  min-height: 320px;
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px dashed rgba(73, 51, 32, 0.22);
  background: rgba(255, 251, 245, 0.65);
  text-align: center;
}

.detail-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.detail-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 14px;
  margin: 0;
}

.compact-detail-meta {
  grid-template-columns: 1fr;
  margin-bottom: 18px;
}

.detail-meta dt {
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.11em;
  color: var(--muted);
}

.detail-meta dd {
  margin: 4px 0 0;
  font-size: 0.95rem;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.detail-meta dd a {
  color: var(--accent-deep);
  text-decoration: none;
}

.detail-meta dd a:hover {
  text-decoration: underline;
}

.keyword-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: end;
  margin-top: 20px;
}

.keyword-toolbar label {
  display: grid;
  gap: 8px;
  min-width: 200px;
}

.keyword-toolbar input,
.keyword-toolbar select {
  width: 100%;
}

.keyword-detail-grid {
  align-items: start;
}

.keyword-side-panel {
  min-height: auto;
}

.pill-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pill small {
  font: inherit;
  opacity: 0.72;
}

.suggestion-group + .suggestion-group {
  margin-top: 18px;
}

.suggestion-group strong,
.diff-grid h4 {
  display: block;
  margin: 0 0 10px;
  font-family: var(--serif);
}

.diff-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.chart-card,
.history-card {
  margin-top: 22px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: rgba(255, 252, 247, 0.78);
  padding: 18px;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: baseline;
  margin-bottom: 14px;
}

.chart-header p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--muted);
}

.chart-wrap svg {
  width: 100%;
  height: auto;
  display: block;
}

.chart-axis {
  font-size: 11px;
  fill: var(--muted);
  font-family: var(--mono);
}

.history-list {
  display: grid;
  gap: 12px;
}

.history-item {
  padding: 14px;
  border-radius: var(--radius-sm);
  background: rgba(159, 79, 45, 0.05);
  border: 1px solid rgba(73, 51, 32, 0.08);
}

.history-item strong,
.history-item p {
  display: block;
}

.history-item strong {
  margin-bottom: 6px;
}

.empty-state {
  margin-top: 18px;
  padding: 28px;
  border-radius: var(--radius-md);
  border: 1px dashed rgba(73, 51, 32, 0.22);
  background: rgba(255, 251, 245, 0.7);
}

.hidden {
  display: none !important;
}

.reveal {
  animation: fade-up 420ms ease both;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(12px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1180px) {
  .stats-grid,
  .filters-form,
  .niche-form {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .content-grid,
  .hero {
    grid-template-columns: 1fr;
  }

  .detail-panel {
    position: static;
    top: auto;
  }

  .diff-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  .page-shell {
    width: min(100vw - 20px, 100%);
    margin: 10px auto 28px;
  }

  .hero,
  .filters-panel,
  .table-panel,
  .detail-panel {
    padding: 18px;
  }

  .table-scrollbar-top.active {
    top: 0;
  }

  .books-sticky-header {
    display: none !important;
  }

  .stats-grid,
  .filters-form,
  .niche-form,
  .detail-meta {
    grid-template-columns: 1fr;
  }

  .panel-head,
  .table-footer,
  .chart-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-topline {
    flex-direction: column;
    align-items: flex-start;
  }

  .route-nav,
  .keyword-toolbar {
    flex-direction: column;
    align-items: stretch;
  }
}