/* Wiki Library — shelf + shared chrome */

:root {
  --bg: transparent;
  --bg-soft: var(--dx-accent-soft);
  --bg-raised: var(--dx-card);
  --border: var(--dx-border);
  --text: var(--dx-text);
  --text-dim: var(--dx-text);
  --text-mute: var(--dx-muted);
  --accent: var(--dx-accent);
  --accent-soft: var(--dx-accent-soft);
  --shadow: var(--dx-shadow, 0 8px 24px hsl(0 0% 0% / 0.08));
  --radius: var(--dx-radius, 16px);
  --radius-sm: var(--dx-radius-sm, 10px);
  --font: var(--dx-font, "Encode Sans", system-ui, sans-serif);
  --max: 720px;
  --cover-w: 92px;
  --cover-h: 128px;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  min-height: 100%;
  color: var(--dx-text);
  font-family: var(--dx-font, var(--font));
  -webkit-font-smoothing: antialiased;
}
html { background-color: var(--dx-bg, #f6f4ef); }
body {
  background: transparent;
  padding-bottom: env(safe-area-inset-bottom);
}

#app,
#view-root,
main {
  background: transparent;
}

#app {
  position: relative;
  z-index: 1;
  width: min(var(--max), calc(100% - 24px));
  margin: 0 auto;
  min-height: calc(100dvh - 56px);
  display: flex;
  flex-direction: column;
}

.dx-header .header-meta {
  font-size: 0.78rem;
  color: var(--dx-muted);
  white-space: nowrap;
}

.dx-header .dong-theme-toggle {
  position: static;
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  flex: none;
}
.dx-header .dong-theme-toggle__knob {
  top: 11px;
  width: 22px;
  height: 22px;
}

#view-root {
  flex: 1;
  padding: 1.15rem 0 1.5rem;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  justify-content: space-between;
  margin-top: 1rem;
  padding: 1rem;
  border-top: 1px solid var(--dx-border);
  font-size: 0.75rem;
  color: var(--dx-muted);
  overflow-wrap: anywhere;
}
.site-footer a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--dx-accent);
  text-decoration: none;
}
.site-footer a:hover { text-decoration: underline; }

/* ---- States ---- */
.state-panel {
  text-align: center;
  padding: 2.5rem 1.25rem;
  color: var(--text-mute);
  font-size: 0.95rem;
}
.state-panel.error { color: var(--text-dim); }
.state-panel .state-title {
  display: block;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.4rem;
  font-size: 1.05rem;
}
.state-panel .retry-btn {
  margin-top: 1rem;
  border: 1px solid var(--dx-border);
  background: var(--dx-card);
  color: var(--dx-text);
  font: inherit;
  font-weight: 600;
  font-size: 0.85rem;
  min-height: 44px;
  min-width: 44px;
  padding: 0.45rem 1rem;
  border-radius: var(--dx-radius-sm);
  cursor: pointer;
}
.state-panel .retry-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ---- Shelf ---- */
.shelf-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.shelf-header h2 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.shelf-header.dx-on-bg,
.shelf-header.dx-on-bg h2,
.shelf-header.dx-on-bg .shelf-count {
  color: var(--dx-on-bg, #fff);
  text-shadow: 0 1px 2px hsl(0 0% 0% / 0.85), 0 0 12px hsl(0 0% 0% / 0.6);
}
.shelf-count {
  font-size: 0.8rem;
  color: var(--dx-muted);
}

.shelf-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
}

@media (min-width: 560px) {
  .shelf-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.book-card {
  display: flex;
  gap: 0.9rem;
  align-items: stretch;
  padding: 0.85rem;
  background: var(--dx-card);
  border: 1px solid var(--dx-border);
  border-radius: var(--dx-radius);
  box-shadow: var(--dx-shadow);
  cursor: pointer;
  text-align: left;
  width: 100%;
  font: inherit;
  color: inherit;
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}
.book-card:hover {
  transform: translateY(-2px);
  border-color: var(--dx-accent);
  box-shadow: var(--dx-shadow);
}
.book-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Cover with spine look */
.book-cover {
  position: relative;
  flex: 0 0 var(--cover-w);
  width: var(--cover-w);
  height: var(--cover-h);
  border-radius: 3px 6px 6px 3px;
  background: var(--cover-accent, #3d5a80);
  box-shadow:
    inset 4px 0 0 rgba(0, 0, 0, 0.18),
    inset 6px 0 0 rgba(255, 255, 255, 0.08),
    inset -1px 0 0 rgba(0, 0, 0, 0.12),
    3px 4px 12px rgba(0, 0, 0, 0.18);
  overflow: hidden;
}
.book-cover::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 10px;
  background: linear-gradient(
    90deg,
    rgba(0, 0, 0, 0.28) 0%,
    rgba(0, 0, 0, 0.08) 55%,
    transparent 100%
  );
}
.book-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    160deg,
    rgba(255, 255, 255, 0.22) 0%,
    transparent 42%,
    rgba(0, 0, 0, 0.12) 100%
  );
  pointer-events: none;
}
.book-cover-title {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  align-items: flex-end;
  padding: 0.55rem 0.45rem 0.55rem 0.85rem;
  font-size: 0.62rem;
  font-weight: 700;
  line-height: 1.25;
  color: #fff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.35);
  letter-spacing: -0.01em;
  word-break: break-word;
}

.book-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.book-title {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.book-meta {
  font-size: 0.75rem;
  color: var(--text-mute);
}
.book-summary {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-dim);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.book-progress {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.15rem;
}
.book-progress-bar {
  flex: 1;
  height: 4px;
  border-radius: 999px;
  background: var(--bg-soft);
  overflow: hidden;
}
.book-progress-fill {
  height: 100%;
  border-radius: inherit;
  background: var(--accent);
  width: 0%;
  transition: width 200ms ease;
}
.book-progress-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-mute);
  min-width: 2.4rem;
  text-align: right;
}
.book-progress.is-new .book-progress-label {
  font-weight: 500;
}

/* ---- Reader stub (fallback) ---- */
.reader-stub {
  padding: 2rem 1rem;
  text-align: center;
  color: var(--text-mute);
}
.reader-stub .stub-title {
  color: var(--text);
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.reader-back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  border: 1px solid var(--dx-border);
  background: var(--dx-card);
  color: var(--dx-accent);
  font: inherit;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
  padding: 0 0.9rem;
  border-radius: var(--dx-radius-sm);
}
.reader-back:hover { text-decoration: underline; }

/* ---- Kindle-like reader ---- */
.reader-shell {
  --reader-font-size: 1.125rem;
  --reader-line: 1.75;
  position: relative;
  max-width: 42rem;
  margin: 0 auto;
}
.reader-shell[data-font="S"] { --reader-font-size: 1rem; --reader-line: 1.65; }
.reader-shell[data-font="M"] { --reader-font-size: 1.125rem; --reader-line: 1.75; }
.reader-shell[data-font="L"] { --reader-font-size: 1.35rem; --reader-line: 1.8; }

.progress-bar {
  position: sticky;
  top: calc(56px + env(safe-area-inset-top));
  z-index: 12;
  height: 3px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
  margin: 0 0 0.85rem;
}
.progress-bar__fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  border-radius: inherit;
  transition: width 120ms ease;
}

.reader-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem 0.75rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border);
}
.reader-toolbar .reader-back { margin: 0; }

.toc-toggle {
  border: 1px solid var(--dx-border);
  background: var(--dx-card);
  color: var(--dx-text);
  font: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  min-height: 44px;
  min-width: 44px;
  padding: 0 0.85rem;
  border-radius: var(--dx-radius-sm);
  cursor: pointer;
}
.toc-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.font-controls {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: auto;
}
.font-btn {
  border: 1px solid var(--dx-border);
  background: var(--dx-card);
  color: var(--dx-text);
  font: inherit;
  font-size: 0.75rem;
  font-weight: 700;
  min-width: 44px;
  min-height: 44px;
  padding: 0 0.45rem;
  border-radius: var(--dx-radius-sm);
  cursor: pointer;
}
.font-btn:hover { color: var(--accent); border-color: var(--accent); }
.font-btn.is-active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}

.reader-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  width: 100%;
}
.reader-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--dx-accent);
  text-decoration: none;
}
.reader-link:hover { text-decoration: underline; }

.toc-backdrop {
  position: fixed;
  inset: 0;
  z-index: 40;
  background: rgba(13, 11, 8, 0.35);
}
html.dark .toc-backdrop { background: rgba(0, 0, 0, 0.55); }

.toc-drawer {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 50;
  width: min(20rem, 88vw);
  height: 100dvh;
  background: var(--dx-card-solid);
  border-right: 1px solid var(--dx-border);
  box-shadow: var(--dx-shadow);
  transform: translateX(-105%);
  transition: transform 220ms cubic-bezier(0.22, 1, 0.36, 1);
  display: flex;
  flex-direction: column;
  padding:
    max(0.85rem, env(safe-area-inset-top))
    0.85rem
    max(1rem, env(safe-area-inset-bottom));
}
.toc-drawer[data-open="true"] { transform: translateX(0); }

.toc-drawer__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.25rem 0.25rem 0.85rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.5rem;
}
.toc-close {
  border: 1px solid var(--dx-border);
  background: var(--dx-card);
  color: var(--dx-muted);
  font-size: 1rem;
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
  padding: 0 0.4rem;
  border-radius: var(--dx-radius-sm);
}
.toc-close:hover { color: var(--text); background: var(--bg-soft); }

.toc-list {
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding-right: 0.15rem;
}
.toc-item {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  width: 100%;
  text-align: left;
  border: none;
  background: transparent;
  color: var(--dx-text);
  font: inherit;
  font-size: 0.85rem;
  line-height: 1.35;
  min-height: 44px;
  padding: 0.55rem 0.45rem;
  border-radius: var(--dx-radius-sm);
  cursor: pointer;
}
.toc-item:hover { background: var(--accent-soft); color: var(--accent); }
.toc-item.is-active {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}
.toc-num {
  flex: 0 0 1.4rem;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-mute);
  padding-top: 0.1rem;
}
.toc-item.is-active .toc-num { color: var(--accent); }
.toc-label { flex: 1; min-width: 0; }

.chapter-panel { padding-bottom: 2rem; }

.chapter-head { margin-bottom: 1.25rem; }
.chapter-kicker {
  margin: 0 0 0.35rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-mute);
  letter-spacing: 0.02em;
}
.chapter-title {
  margin: 0 0 0.4rem;
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--text);
}
.chapter-pos {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-mute);
}

.chapter-body {
  font-size: var(--reader-font-size);
  line-height: var(--reader-line);
  color: var(--text-dim);
}
.chapter-body p {
  margin: 0 0 1.05em;
}
.chapter-body p:last-child { margin-bottom: 0; }
.chapter-body .chapter-empty {
  color: var(--text-mute);
  font-style: italic;
}

.chapter-nav {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}
.nav-btn {
  border: 1px solid var(--dx-border);
  background: var(--dx-card);
  color: var(--dx-text);
  font: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  min-height: 44px;
  min-width: 44px;
  padding: 0.55rem 0.9rem;
  border-radius: var(--dx-radius-sm);
  cursor: pointer;
}
.nav-btn:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
}
.nav-btn--primary {
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
  color: var(--accent);
}
.nav-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

body.toc-open { overflow: hidden; }

.hidden { display: none !important; }