:root {
  color-scheme: light;
  --text-xs: 12px;
  --text-sm: 13px;
  --text-md: 14px;
  --text-lg: 18px;
  --title-panel: clamp(18px, 1.8vw, 22px);
  --page-start: #eee5cf;
  --page-end: #dfd3b6;
  --page-radial-blue: rgba(59, 130, 246, 0.08);
  --page-radial-purple: rgba(139, 92, 246, 0.06);
  --panel: linear-gradient(135deg, rgba(238, 230, 214, 0.96) 0%, rgba(225, 212, 190, 0.98) 100%);
  --panel-soft: rgba(235, 220, 198, 0.92);
  --panel-border: #baa485;
  --surface-card: #ebdcca;
  --surface-card-muted: #e0d1bb;
  --surface-card-soft: #d8ceb9;
  --surface-code: #0f172a;
  --surface-code-border: #cbd5e1;
  --ink: #33291b;
  --ink-secondary: #4d402d;
  --muted: #6e5d46;
  --subtle: #8a785d;
  --accent: #2c68ff;
  --accent-alt: #9d66ff;
  --accent-gradient: linear-gradient(135deg, #2563eb 0%, #8b5cf6 100%);
  --accent-gradient-soft: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
  --accent-contrast: #ffffff;
  --accent-border: #bfdbfe;
  --search-highlight-bg: linear-gradient(135deg, rgba(189, 28, 60, 0.24) 0%, rgba(239, 68, 68, 0.18) 100%);
  --search-highlight-border: rgba(167, 22, 52, 0.48);
  --search-highlight-text: #7f1027;
  --search-highlight-glow: rgba(239, 68, 68, 0.16);
  --shadow-soft: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-panel: 0 18px 40px rgba(36, 43, 58, 0.12);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
}

[data-theme='dark'] {
  color-scheme: dark;
  --page-start: #0f1322;
  --page-end: #0a0d18;
  --page-radial-blue: rgba(37, 99, 235, 0.15);
  --page-radial-purple: rgba(139, 92, 246, 0.12);
  --panel: linear-gradient(135deg, rgba(26, 30, 44, 0.96) 0%, rgba(18, 20, 30, 0.98) 100%);
  --panel-soft: rgba(31, 37, 55, 0.9);
  --panel-border: #3f3f46;
  --surface-card: #1e2335;
  --surface-card-muted: #252b40;
  --surface-card-soft: #2c344a;
  --surface-code: #020617;
  --surface-code-border: #334155;
  --ink: #f8fafc;
  --ink-secondary: #cbd5e1;
  --muted: #94a3b8;
  --subtle: #64748b;
  --accent: #3b82f6;
  --accent-alt: #a855f7;
  --accent-gradient: linear-gradient(135deg, #3b82f6 0%, #a855f7 100%);
  --accent-gradient-soft: linear-gradient(135deg, rgba(59, 130, 246, 0.16) 0%, rgba(168, 85, 247, 0.16) 100%);
  --accent-contrast: #ffffff;
  --accent-border: #1d4ed8;
  --search-highlight-bg: linear-gradient(135deg, rgba(190, 24, 93, 0.34) 0%, rgba(239, 68, 68, 0.28) 100%);
  --search-highlight-border: rgba(251, 113, 133, 0.52);
  --search-highlight-text: #ffe4ea;
  --search-highlight-glow: rgba(244, 63, 94, 0.22);
  --shadow-soft: 0 4px 6px -1px rgba(0, 0, 0, 0.45), 0 2px 4px -1px rgba(0, 0, 0, 0.28);
  --shadow-panel: 0 18px 40px rgba(0, 0, 0, 0.4);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

html {
  background: var(--page-end);
}

html[data-reader-fullscreen='true'],
body[data-reader-fullscreen='true'] {
  height: 100%;
  overflow: hidden;
}

body {
  color: var(--ink);
  font-family: "IBM Plex Sans", "Noto Sans SC", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, var(--page-radial-blue), transparent 30%),
    radial-gradient(circle at right center, var(--page-radial-purple), transparent 24%),
    linear-gradient(180deg, var(--page-start) 0%, var(--page-end) 100%);
  background-attachment: fixed;
  transition: background-color 160ms ease, color 160ms ease;
}

button,
input,
textarea,
select {
  font-family: inherit;
}

.page-shell {
  width: min(1460px, calc(100vw - 32px));
  margin: 24px auto 40px;
}

.hero {
  display: block;
  margin-bottom: 20px;
}

.hero-copy,
.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-panel);
  backdrop-filter: blur(8px);
  transition: background 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.hero-shell {
  display: block;
}

.hero-copy {
  padding: 28px 30px;
  width: 100%;
}

.hero-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) calc((100% - 24px) / 3);
  gap: 18px;
  align-items: stretch;
  margin-top: 2px;
}

.hero-body[data-side-visible='false'] {
  grid-template-columns: minmax(0, 1fr);
}

.hero-main {
  min-width: 0;
}

.hero-side {
  display: grid;
  gap: 10px;
  align-content: start;
  width: 100%;
  min-width: 0;
}

.hero-side[hidden] {
  display: none;
}

.purchase-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 172px;
  gap: 10px;
  align-items: stretch;
  align-content: start;
  width: 100%;
  min-width: 0;
  align-self: stretch;
}

.purchase-card[hidden] {
  display: none;
}

.purchase-copy-card,
.purchase-qr-card,
.official-account-card {
  min-width: 0;
  border: 1px solid color-mix(in srgb, var(--panel-border) 74%, transparent);
  border-radius: 18px;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--surface-card) 94%, transparent), color-mix(in srgb, var(--surface-card-muted) 88%, transparent));
  box-shadow: var(--shadow-soft);
}

.purchase-copy-card {
  display: flex;
}

.official-account-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 112px;
  gap: 10px;
  align-items: center;
  padding: 10px;
}

.official-account-card[hidden] {
  display: none;
}

.official-account-copy {
  min-width: 0;
}

.purchase-card-copy {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: 8px;
  min-height: 100%;
  width: 100%;
  padding: 10px 12px;
  min-width: 0;
}

.hero-top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 10px;
}

.hero-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  margin-left: auto;
}

.auth-widget {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-width: 0;
}

.auth-signed-out {
  display: grid;
  grid-template-columns: auto minmax(320px, 1fr);
  gap: 8px;
  align-items: center;
  min-width: 0;
}

.auth-signed-out[hidden],
.auth-signed-in[hidden] {
  display: none;
}

.auth-mode-toggle {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  border: 1px solid color-mix(in srgb, var(--panel-border) 82%, transparent);
  border-radius: 999px;
  background: color-mix(in srgb, var(--panel-soft) 88%, transparent);
}

.auth-mode-button {
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: var(--text-sm);
  font-weight: 700;
  padding: 8px 11px;
  transition: background 160ms ease, color 160ms ease, transform 160ms ease;
}

.auth-mode-button:hover {
  color: var(--ink);
  transform: translateY(-1px);
}

.auth-mode-button.is-active {
  background: var(--accent-gradient);
  color: var(--accent-contrast);
  box-shadow: var(--shadow-soft);
}

.auth-form {
  display: flex;
  gap: 8px;
  min-width: 0;
}

.auth-form input {
  width: 130px;
  min-width: 0;
  padding: 10px 11px;
  border-radius: 14px;
  border: 1px solid color-mix(in srgb, var(--panel-border) 76%, transparent);
  background: color-mix(in srgb, var(--surface-card) 90%, transparent);
  color: inherit;
  font: inherit;
  font-size: var(--text-sm);
  transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.auth-form input:focus-visible {
  outline: none;
  border-color: var(--accent-border);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent);
}

.auth-submit {
  min-width: 62px;
  white-space: nowrap;
}

.auth-message {
  grid-column: 2;
  min-height: 18px;
  margin: -2px 0 0;
  color: var(--muted);
  font-size: var(--text-xs);
  line-height: 1.45;
}

.auth-message[data-error='true'] {
  color: #b91c1c;
}

[data-theme='dark'] .auth-message[data-error='true'] {
  color: #fca5a5;
}

.auth-signed-in {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  min-width: 0;
}

.auth-email {
  display: inline-flex;
  align-items: center;
  max-width: 220px;
  min-height: 40px;
  padding: 0 12px;
  border: 1px solid color-mix(in srgb, var(--panel-border) 76%, transparent);
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface-card) 88%, transparent);
  color: var(--ink-secondary);
  font-size: var(--text-sm);
  font-weight: 700;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.eyebrow,
.panel-kicker {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.hero-top .eyebrow {
  margin-bottom: 0;
}

.hero-public-label {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 12px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent-border) 76%, transparent);
  color: var(--ink-secondary);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.hero h1,
.panel h2 {
  margin: 0;
  font-family: "Iowan Old Style", "Palatino Linotype", "Noto Serif SC", serif;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hero h1 {
  font-size: clamp(32px, 5vw, 52px);
}

.panel h2 {
  font-size: var(--title-panel);
}

.hero-text,
.reader-subtitle,
.search-meta,
#content-meta {
  color: var(--muted);
  line-height: 1.6;
}

.hero-text {
  margin: 14px 0 0;
  max-width: none;
  white-space: nowrap;
}

.hero-notice {
  margin: 12px 0 0;
  color: var(--ink-secondary);
  font-size: var(--text-sm);
  line-height: 1.7;
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.purchase-card-title {
  color: var(--ink);
  font-family: "Iowan Old Style", "Palatino Linotype", "Noto Serif SC", serif;
  font-size: clamp(16px, 1.2vw, 19px);
  line-height: 1.25;
}

.official-account-title {
  display: block;
  margin-bottom: 6px;
  color: var(--ink);
  font-family: "Iowan Old Style", "Palatino Linotype", "Noto Serif SC", serif;
  font-size: 16px;
  line-height: 1.25;
}

.purchase-price {
  margin: 0;
  color: var(--accent);
  font-family: "Iowan Old Style", "Palatino Linotype", "Noto Serif SC", serif;
  font-size: 22px;
  font-weight: 800;
  line-height: 1.15;
}

.purchase-card-text,
.purchase-message,
.official-account-text {
  margin: 0;
  color: var(--ink-secondary);
  font-size: 11.5px;
  line-height: 1.66;
}

.purchase-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 7px;
}

.purchase-form input {
  width: 100%;
  min-width: 0;
  padding: 9px 10px;
  border-radius: 12px;
  border: 1px solid color-mix(in srgb, var(--panel-border) 76%, transparent);
  background: color-mix(in srgb, var(--surface-card) 90%, transparent);
  color: inherit;
  font: inherit;
  font-size: var(--text-xs);
}

.purchase-submit {
  grid-column: 1 / -1;
  min-height: 34px;
  font-size: var(--text-xs);
}

.purchase-message {
  min-height: 18px;
  color: var(--muted);
}

.purchase-message[data-error='true'] {
  color: #b91c1c;
}

[data-theme='dark'] .purchase-message[data-error='true'] {
  color: #fca5a5;
}

.purchase-qr-card {
  display: flex;
  padding: 8px;
}

.purchase-qr-frame {
  display: grid;
  place-items: center;
  flex: 1 1 auto;
  width: 100%;
  height: 100%;
  min-height: 0;
  margin: 0;
  padding: 4px;
  border-radius: 14px;
  border: 1px solid color-mix(in srgb, var(--panel-border) 76%, transparent);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--surface-card) 96%, transparent), color-mix(in srgb, var(--surface-card-muted) 90%, transparent));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), var(--shadow-soft);
}

.purchase-qr-frame[data-qr-ready='true'] {
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--surface-card) 98%, transparent), color-mix(in srgb, var(--surface-card) 92%, transparent));
}

.purchase-qr-image {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 10px;
  background: #fff;
  box-shadow: var(--shadow-soft);
  object-fit: contain;
  aspect-ratio: 1 / 1;
}

.purchase-qr-placeholder {
  display: grid;
  place-items: center;
  width: 100%;
  aspect-ratio: 1 / 1;
  border: 1px dashed color-mix(in srgb, var(--panel-border) 82%, transparent);
  border-radius: 10px;
  color: var(--muted);
  font-size: var(--text-xs);
  font-weight: 700;
}

.official-account-qr-frame {
  display: grid;
  place-items: center;
  width: 100%;
  aspect-ratio: 1 / 1;
  padding: 4px;
  border-radius: 14px;
  border: 1px solid color-mix(in srgb, var(--panel-border) 76%, transparent);
  background: #fff;
  box-shadow: var(--shadow-soft);
}

.official-account-qr-image {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 10px;
  background: #fff;
  object-fit: contain;
}

.hero-link-button {
  min-width: 0;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  width: 100%;
  margin-top: 18px;
}

.stat-card {
  padding: 14px 16px;
  background: linear-gradient(135deg, var(--surface-card) 0%, var(--surface-card-muted) 100%);
  border-radius: var(--radius-lg);
  border: 1px solid color-mix(in srgb, var(--panel-border) 72%, transparent);
  box-shadow: var(--shadow-soft);
  min-width: 0;
  text-align: center;
}

.stat-label {
  display: block;
  color: var(--muted);
  font-size: var(--text-sm);
  margin-bottom: 8px;
}

.stat-card strong {
  font-size: 22px;
  font-family: "Iowan Old Style", "Palatino Linotype", "Noto Serif SC", serif;
}

.workspace {
  display: grid;
  grid-template-columns: 320px 360px minmax(0, 1fr);
  gap: 18px;
}

.workspace-toolbar {
  display: grid;
  grid-template-columns: 320px 360px minmax(0, 1fr);
  gap: 18px;
  margin-bottom: 14px;
}

.workspace-toolbar[data-books-open='true'][data-search-open='true'] {
  grid-template-columns: 320px 360px minmax(0, 1fr);
}

.workspace-toolbar[data-books-open='false'][data-search-open='true'] {
  grid-template-columns: 320px 360px minmax(0, 1fr);
}

.workspace-toolbar[data-books-open='true'][data-search-open='false'] {
  grid-template-columns: 320px 360px minmax(0, 1fr);
}

.workspace-toolbar[data-books-open='false'][data-search-open='false'] {
  grid-template-columns: 320px 360px minmax(0, 1fr);
}

.workspace-toolbar-slot {
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
}

.page-shell[data-reader-fullscreen='true'] {
  width: 100%;
  margin: 0;
}

.page-shell[data-reader-fullscreen='true'] .hero,
.page-shell[data-reader-fullscreen='true'] .workspace-toolbar,
.workspace[data-reader-fullscreen='true'] .panel-books,
.workspace[data-reader-fullscreen='true'] .panel-search {
  display: none;
}

.workspace[data-books-open='false'] .panel-books,
.workspace[data-search-open='false'] .panel-search {
  display: none;
}

.workspace[data-books-open='true'][data-search-open='true'] {
  grid-template-columns: 320px 360px minmax(0, 1fr);
}

.workspace[data-books-open='false'][data-search-open='true'] {
  grid-template-columns: 360px minmax(0, 1fr);
}

.workspace[data-books-open='true'][data-search-open='false'] {
  grid-template-columns: 320px minmax(0, 1fr);
}

.workspace[data-books-open='false'][data-search-open='false'] {
  grid-template-columns: minmax(0, 1fr);
}

.workspace[data-reader-fullscreen='true'] {
  display: block;
}

.panel {
  padding: 20px;
}

.workspace[data-reader-fullscreen='true'] .panel-reader {
  position: fixed;
  inset: 12px;
  height: calc(100dvh - 24px);
  max-height: calc(100dvh - 24px);
  z-index: 120;
  margin: 0;
  display: flex;
  flex-direction: column;
  min-height: 0;
  border-radius: 24px;
  box-shadow: 0 24px 80px rgba(8, 12, 24, 0.28);
  overflow: hidden;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.3rem;
  border: 1px solid color-mix(in srgb, var(--panel-border) 88%, transparent);
  border-radius: 999px;
  background: color-mix(in srgb, var(--panel-soft) 92%, transparent);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.theme-toggle__button {
  border: 0;
  background: transparent;
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--text-sm);
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, color 160ms ease, box-shadow 160ms ease;
}

.theme-toggle__button:hover {
  background: var(--accent-gradient-soft);
  color: var(--ink);
  transform: translateY(-2px);
  box-shadow: var(--shadow-soft);
}

.theme-toggle__button--active {
  background: var(--accent-gradient);
  color: var(--accent-contrast);
  box-shadow: var(--shadow-soft);
}

.site-panel {
  position: fixed;
  inset: 0;
  z-index: 160;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(10, 12, 20, 0.34);
  backdrop-filter: blur(8px);
}

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

.site-panel-card {
  width: min(760px, calc(100vw - 32px));
  max-height: min(80vh, 820px);
  overflow: auto;
  padding: 22px;
  border-radius: var(--radius-xl);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  box-shadow: var(--shadow-panel);
}

.site-panel-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 16px;
}

.site-panel-head strong {
  font-size: clamp(22px, 3vw, 28px);
  font-family: "Iowan Old Style", "Palatino Linotype", "Noto Serif SC", serif;
}

.site-panel-body {
  color: var(--ink-secondary);
  line-height: 1.8;
  font-size: var(--text-md);
}

.site-panel-body p {
  margin: 0 0 1em;
}

.site-panel-action {
  margin-top: 20px;
}

.primary-link-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 14px;
  background: var(--accent-gradient);
  color: var(--accent-contrast);
  text-decoration: none;
  font-weight: 700;
  box-shadow: var(--shadow-soft);
}

.panel-head,
.reader-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 18px;
}

.reader-head-actions {
  display: flex;
  justify-content: flex-end;
  align-items: flex-start;
}

.panel-head--stacked {
  flex-direction: column;
  align-items: stretch;
  gap: 12px;
}

.panel-head-copy {
  min-width: 0;
}

.browse-taxonomy {
  display: grid;
  gap: 8px;
}

.browse-series-label {
  color: var(--ink-secondary);
  font-size: var(--text-sm);
  font-weight: 700;
  line-height: 1.4;
}

.filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-chip {
  border: 1px solid color-mix(in srgb, var(--panel-border) 70%, transparent);
  background: color-mix(in srgb, var(--surface-card) 88%, transparent);
  color: var(--ink-secondary);
  padding: 8px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease, color 160ms ease;
}

.filter-chip:hover {
  transform: translateY(-1px);
  border-color: var(--accent-border);
  background: var(--accent-gradient-soft);
}

.filter-chip.is-active {
  background: var(--accent-gradient);
  border-color: var(--accent-border);
  color: var(--accent-contrast);
  box-shadow: var(--shadow-soft);
}

.book-list,
.search-list,
.file-list {
  display: grid;
  gap: 10px;
}

.book-item,
.search-item,
.file-item {
  width: 100%;
  text-align: left;
  border: 1px solid color-mix(in srgb, var(--panel-border) 74%, transparent);
  background: color-mix(in srgb, var(--surface-card) 84%, transparent);
  border-radius: var(--radius-md);
  cursor: pointer;
  color: inherit;
  box-shadow: var(--shadow-soft);
  transition: transform 140ms ease, border-color 140ms ease, background 140ms ease, box-shadow 140ms ease;
}

.book-item:hover,
.search-item:hover,
.file-item:hover,
.book-item.is-active,
.file-item.is-active {
  transform: translateY(-1px);
  border-color: var(--accent-border);
  background: var(--accent-gradient-soft);
  box-shadow: var(--shadow-panel);
}

.book-item,
.search-item {
  padding: 14px;
}

.file-item {
  padding: 10px 12px;
}

.item-title {
  display: block;
  font-weight: 700;
  font-size: var(--text-md);
  line-height: 1.45;
  margin-bottom: 6px;
}

.item-kicker,
.item-meta,
.item-tags {
  display: block;
  color: var(--muted);
  font-size: var(--text-xs);
  line-height: 1.5;
}

.item-kicker {
  margin-bottom: 8px;
}

.item-meta--reason {
  margin-top: 2px;
}

.hit-badge {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 0 10px;
  border-radius: 999px;
  background: var(--accent-gradient-soft);
  border: 1px solid color-mix(in srgb, var(--accent-border) 76%, transparent);
  color: var(--ink-secondary);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.search-form {
  margin-bottom: 16px;
}

.search-label {
  display: block;
  margin-bottom: 8px;
  font-size: var(--text-sm);
  color: var(--muted);
}

.search-row {
  display: flex;
  gap: 10px;
}

.search-row input {
  flex: 1;
  min-width: 0;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid color-mix(in srgb, var(--panel-border) 76%, transparent);
  background: color-mix(in srgb, var(--surface-card) 90%, transparent);
  color: inherit;
  font: inherit;
  transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.search-row input:focus-visible {
  outline: none;
  border-color: var(--accent-border);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent);
}

.search-row button,
.primary-button {
  padding: 12px 16px;
  border: 0;
  border-radius: 14px;
  background: var(--accent-gradient);
  color: var(--accent-contrast);
  font: inherit;
  cursor: pointer;
  font-weight: 700;
  box-shadow: var(--shadow-soft);
  transition: transform 160ms ease, box-shadow 160ms ease, opacity 160ms ease;
}

.search-row button:hover,
.primary-button:hover {
  transform: translateY(-2px) scale(1.01);
  box-shadow: var(--shadow-panel);
}

.secondary-button {
  padding: 11px 15px;
  border-radius: 14px;
  border: 1px solid color-mix(in srgb, var(--panel-border) 78%, transparent);
  background: color-mix(in srgb, var(--surface-card) 88%, transparent);
  color: var(--ink-secondary);
  font: inherit;
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-soft);
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease, border-color 160ms ease, color 160ms ease;
}

.secondary-button:hover {
  transform: translateY(-1px);
  border-color: var(--accent-border);
  background: var(--accent-gradient-soft);
  box-shadow: var(--shadow-panel);
}

.secondary-button.is-active {
  border-color: var(--accent-border);
  background: var(--accent-gradient-soft);
  color: var(--ink);
}

button:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}

.reader-grid {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 16px;
  min-height: 620px;
  align-items: stretch;
}

.workspace[data-reader-fullscreen='true'] .reader-grid {
  flex: 1 1 auto;
  min-height: 0;
  height: auto;
  overflow: hidden;
}

.reader-files {
  padding: 12px;
  background: linear-gradient(180deg, color-mix(in srgb, var(--surface-card-muted) 72%, transparent), color-mix(in srgb, var(--surface-card) 68%, transparent));
  border-radius: var(--radius-lg);
  border: 1px solid color-mix(in srgb, var(--panel-border) 74%, transparent);
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  scrollbar-width: thin;
  scrollbar-color: color-mix(in srgb, var(--accent) 46%, var(--panel-border)) transparent;
}

.reader-files-head {
  margin-bottom: 12px;
  font-weight: 700;
  color: var(--ink-secondary);
  font-size: var(--text-sm);
}

.reader-content {
  display: flex;
  flex-direction: column;
  padding: 18px;
  background: linear-gradient(180deg, color-mix(in srgb, var(--surface-card) 88%, transparent), color-mix(in srgb, var(--surface-card-muted) 92%, transparent));
  border-radius: var(--radius-lg);
  border: 1px solid color-mix(in srgb, var(--panel-border) 76%, transparent);
  min-height: 0;
  overflow: hidden;
}

.content-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

#content-title {
  font-size: var(--text-lg);
  line-height: 1.35;
}

.content-markdown {
  flex: 1;
  min-height: 0;
  margin: 0;
  line-height: 1.7;
  font-size: var(--text-md);
  color: var(--ink-secondary);
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  scrollbar-width: thin;
  scrollbar-color: color-mix(in srgb, var(--accent) 46%, var(--panel-border)) transparent;
}

.reader-files::-webkit-scrollbar,
.content-markdown::-webkit-scrollbar {
  width: 10px;
}

.reader-files::-webkit-scrollbar-track,
.content-markdown::-webkit-scrollbar-track {
  background: transparent;
}

.reader-files::-webkit-scrollbar-thumb,
.content-markdown::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--accent) 44%, var(--panel-border));
  border: 2px solid transparent;
  border-radius: 999px;
  background-clip: padding-box;
}

.reader-files::-webkit-scrollbar-thumb:hover,
.content-markdown::-webkit-scrollbar-thumb:hover {
  background: color-mix(in srgb, var(--accent) 60%, var(--panel-border));
}

.content-markdown > :first-child {
  margin-top: 0;
}

.content-markdown > :last-child {
  margin-bottom: 0;
}

.content-markdown h1,
.content-markdown h2,
.content-markdown h3,
.content-markdown h4 {
  font-family: "Iowan Old Style", "Palatino Linotype", "Noto Serif SC", serif;
  line-height: 1.3;
  margin: 1.3em 0 0.6em;
}

.content-markdown p,
.content-markdown blockquote,
.content-markdown ul,
.content-markdown ol,
.content-markdown table,
.content-markdown hr {
  margin: 0 0 1em;
}

.content-markdown blockquote {
  padding: 12px 14px;
  border-left: 4px solid var(--accent-border);
  background: var(--accent-gradient-soft);
  border-radius: 0 12px 12px 0;
}

.content-markdown blockquote p {
  margin: 0.3em 0;
}

.content-markdown code {
  padding: 0.12em 0.4em;
  border-radius: 8px;
  background: color-mix(in srgb, var(--surface-code) 14%, transparent);
  font-family: "SFMono-Regular", "Cascadia Code", "Source Code Pro", monospace;
  font-size: 0.92em;
}

.content-markdown ul,
.content-markdown ol {
  padding-left: 1.5em;
}

.content-markdown li + li {
  margin-top: 0.35em;
}

.content-markdown table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  background: color-mix(in srgb, var(--surface-card) 92%, transparent);
}

.content-markdown th,
.content-markdown td {
  padding: 8px 10px;
  border: 1px solid color-mix(in srgb, var(--panel-border) 76%, transparent);
  vertical-align: top;
}

.content-markdown th {
  background: var(--accent-gradient-soft);
  text-align: left;
}

.content-markdown a {
  color: var(--accent);
}

.content-markdown img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 1rem auto;
  border-radius: 16px;
  border: 1px solid color-mix(in srgb, var(--panel-border) 72%, transparent);
  background: color-mix(in srgb, var(--surface-card) 88%, transparent);
  box-shadow: var(--shadow-soft);
}

.content-markdown .katex-display {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 6px 2px;
}

.content-markdown .katex {
  font-size: 1.05em;
}

.directory-group {
  border: 1px solid color-mix(in srgb, var(--panel-border) 70%, transparent);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--surface-card) 72%, transparent);
  box-shadow: var(--shadow-soft);
  overflow: clip;
}

.directory-group[open] {
  border-color: var(--accent-border);
}

.directory-group-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 12px;
  list-style: none;
  cursor: pointer;
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--ink-secondary);
  transition: background 160ms ease, color 160ms ease;
}

.directory-group-summary::-webkit-details-marker {
  display: none;
}

.directory-group-summary::before {
  content: '▸';
  color: var(--muted);
  transition: transform 160ms ease;
}

.directory-group[open] .directory-group-summary::before {
  transform: rotate(90deg);
}

.directory-group-summary:hover {
  background: var(--accent-gradient-soft);
}

.directory-group-label {
  flex: 1;
  min-width: 0;
}

.directory-group-count {
  flex-shrink: 0;
  min-width: 28px;
  padding: 2px 8px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface-card-soft) 88%, transparent);
  color: var(--muted);
  font-size: var(--text-xs);
  font-weight: 700;
  text-align: center;
}

.directory-group-items {
  display: grid;
  gap: 8px;
  padding: 0 10px 10px;
}

.directory-group .file-item {
  box-shadow: none;
}

.content-markdown .is-hit-anchor {
  position: relative;
  color: var(--ink);
}

.content-markdown .is-hit-anchor::before {
  content: '';
  position: absolute;
  inset: -0.2em -0.35em;
  border-radius: 12px;
  background: color-mix(in srgb, var(--accent) 16%, transparent);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 22%, transparent);
  z-index: -1;
  animation: hit-anchor-fade 1.8s ease forwards;
}

.search-highlight {
  padding: 0 0.18em;
  border-radius: 0.32em;
  background: var(--search-highlight-bg);
  color: var(--search-highlight-text);
  font-weight: 600;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
  box-shadow:
    inset 0 -1px 0 var(--search-highlight-border),
    0 0 0 1px color-mix(in srgb, var(--search-highlight-border) 72%, transparent),
    0 0 0.8rem color-mix(in srgb, var(--search-highlight-glow) 88%, transparent);
}

@keyframes hit-anchor-fade {
  0% {
    opacity: 1;
  }
  100% {
    opacity: 0.18;
  }
}

.empty-note {
  color: var(--muted);
  padding: 14px;
  border: 1px dashed color-mix(in srgb, var(--panel-border) 72%, transparent);
  background: color-mix(in srgb, var(--surface-card) 52%, transparent);
  border-radius: var(--radius-md);
}

@media (max-width: 1180px) {
  .hero-shell {
    display: block;
  }

  .hero-body {
    grid-template-columns: minmax(0, 1fr) calc((100% - 24px) / 3);
  }

  .hero-body[data-side-visible='false'] {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .reader-grid {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .workspace[data-reader-fullscreen='true'] .panel-reader {
    inset: 8px;
  }
}

@media (max-width: 860px) {
  .page-shell {
    width: min(100vw - 18px, 100%);
    margin: 10px auto 24px;
  }

  .hero-copy {
    width: 100%;
  }

  .purchase-card {
    width: 100%;
  }

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

  .hero-stats {
    grid-template-columns: 1fr;
    width: 100%;
  }

  .hero-top,
  .panel-head,
  .reader-head {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-brand {
    flex-wrap: wrap;
  }

  .hero-actions {
    margin-left: 0;
    align-items: stretch;
    flex-direction: column;
  }

  .auth-widget,
  .auth-signed-in {
    justify-content: stretch;
  }

  .auth-signed-out {
    grid-template-columns: 1fr;
  }

  .auth-form {
    display: grid;
    grid-template-columns: 1fr;
  }

  .auth-form input,
  .auth-submit,
  .auth-logout,
  .auth-email,
  .theme-toggle {
    width: 100%;
  }

  .auth-message {
    grid-column: 1;
  }

  .auth-email {
    max-width: none;
    justify-content: center;
  }

  .purchase-card {
    grid-template-columns: minmax(0, 1fr) 132px;
  }

  .official-account-card {
    grid-template-columns: minmax(0, 1fr) 108px;
  }

  .hero-text {
    white-space: normal;
  }

  .panel,
  .hero-copy,
  .hero-stats {
    border-radius: 22px;
  }

  .search-row {
    flex-direction: column;
  }

  .workspace-toolbar {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .workspace-toolbar .secondary-button,
  .reader-head-actions .secondary-button,
  .hero-links .secondary-button,
  .site-panel-head .secondary-button,
  .primary-link-button {
    width: 100%;
  }

  .site-panel {
    padding: 12px;
  }
}