margin/src/styles/app.css

* {
  box-sizing: border-box;
}

html,
body,
#root {
  height: 100%;
}

body {
  margin: 0;
  background: var(--shell);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: var(--t-3);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--selection);
}

button {
  font-family: inherit;
  color: inherit;
  border: 0;
  background: none;
  cursor: pointer;
  padding: 0;
}

.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

.titlebar {
  flex: none;
  height: 46px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 14px 0 84px;
  background: var(--shell);
  border-bottom: 1px solid var(--line);
}

.titlebar .doc-title {
  grid-column: 2;
  font-size: var(--t-2);
  letter-spacing: 0.02em;
  color: var(--ink-soft);
}

.titlebar .actions {
  grid-column: 3;
  justify-self: end;
  display: flex;
  gap: 4px;
}

.icon-btn {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: var(--r-sm);
  color: var(--ink-soft);
  transition: background 120ms var(--ease), color 120ms var(--ease);
}

.icon-btn:hover {
  background: var(--accent-wash);
  color: var(--ink);
}

.icon-btn[data-on="true"] {
  color: var(--accent);
  background: var(--accent-wash);
  box-shadow: inset 0 0 0 1px var(--line-strong);
}

.dirty-dot {
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-left: 8px;
  border-radius: 50%;
  background: var(--accent);
  vertical-align: middle;
}

.body {
  flex: 1;
  display: flex;
  min-height: 0;
}

.pane-resizer {
  flex: none;
  width: 0;
  position: relative;
  z-index: 5;
  cursor: col-resize;
}

.pane-resizer::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: -4px;
  width: 8px;
}

.pane-resizer::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: -1px;
  width: 2px;
  background: var(--accent);
  opacity: 0;
  transition: opacity 120ms var(--ease);
}

.pane-resizer:hover::after,
body.resizing .pane-resizer::after {
  opacity: 0.55;
}

body.resizing {
  cursor: col-resize;
  user-select: none;
  -webkit-user-select: none;
}

.sidebar {
  width: var(--pane-sidebar);
  flex: none;
  background: var(--sidebar);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  padding: 6px 0 10px;
  user-select: none;
  -webkit-user-select: none;
}

.brand {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 18px 16px;
  color: var(--ink-faint);
  cursor: pointer;
  transition: color 120ms var(--ease);
}

.brand .back-label {
  font-family: var(--font-ui);
  font-size: var(--t-3);
  font-weight: 600;
  color: var(--ink-soft);
  transition: color 120ms var(--ease);
}

.brand:hover,
.brand:hover .back-label {
  color: var(--accent);
}

.nav-label {
  padding: 4px 22px;
  font-size: var(--t-1);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.chapters {
  list-style: none;
  margin: 6px 0 0;
  padding: 0 10px;
  overflow-y: auto;
  flex: 1;
}

.chapter {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 11px;
  padding: 8px 12px;
  border-radius: var(--r-sm);
  color: var(--ink-soft);
  cursor: pointer;
  transition: background 120ms var(--ease), color 120ms var(--ease);
}

.chapter:hover {
  background: var(--accent-wash);
  color: var(--ink);
}

.chapter[data-active="true"] {
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 1px 2px rgba(35, 32, 27, 0.05);
}

.chapter[data-active="true"]::before {
  content: "";
  position: absolute;
  left: -10px;
  top: 8px;
  bottom: 8px;
  width: 3px;
  background: var(--accent);
  border-radius: 0 2px 2px 0;
}

.chapter .num {
  font-size: var(--t-1);
  color: var(--ink-faint);
  width: 13px;
  font-variant-numeric: tabular-nums;
}

.chapter[data-active="true"] .num {
  color: var(--accent);
}

.chapter .text {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.chapter .title {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chapter .meta {
  font-family: var(--font-ui);
  font-size: var(--t-1);
  letter-spacing: 0.01em;
  color: var(--ink-faint);
}

.chapter .grip {
  display: grid;
  place-items: center;
  align-self: center;
  margin: 0 -5px 0 -6px;
  color: var(--ink-faint);
  opacity: 0;
  cursor: grab;
  transition: opacity 120ms var(--ease);
}

.chapter:hover .grip,
.chapter[data-active="true"] .grip {
  opacity: 0.55;
}

.chapter .grip:active {
  cursor: grabbing;
}

.chapter[data-dragging="true"] {
  opacity: 0.4;
}

.chapter[data-drop-before="true"]::after,
.chapter[data-drop-after="true"]::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.chapter[data-drop-before="true"]::after {
  top: -1px;
}

.chapter[data-drop-after="true"]::after {
  bottom: -1px;
}

.row-menu-btn {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: var(--r-sm);
  color: var(--ink-faint);
  transition: opacity 120ms var(--ease), background 120ms var(--ease), color 120ms var(--ease);
}

.row-menu-btn:hover {
  background: var(--accent-wash);
  color: var(--ink);
}

.chapter .row-menu-btn {
  align-self: center;
  margin-right: -4px;
  opacity: 0;
}

.chapter:hover .row-menu-btn,
.chapter .row-menu-btn[data-open="true"] {
  opacity: 0.7;
}

.chapter:hover .row-menu-btn:hover,
.chapter .row-menu-btn[data-open="true"] {
  opacity: 1;
}

.row-menu-pop {
  position: fixed;
  z-index: 50;
  min-width: 148px;
  padding: 5px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-pop);
}

.row-menu-item {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding: 8px 10px;
  border-radius: var(--r-sm);
  font-family: var(--font-ui);
  font-size: var(--t-3);
  color: var(--ink-soft);
  transition: background 120ms var(--ease), color 120ms var(--ease);
}

.row-menu-item:hover {
  background: var(--accent-wash);
  color: var(--ink);
}

.row-menu-item.danger {
  color: var(--danger);
}

.row-menu-item.danger:hover {
  background: var(--danger-wash);
  color: var(--danger);
}

.add-chapter {
  margin: 8px 10px 4px;
  width: calc(100% - 20px);
  padding: 9px 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--r-sm);
  color: var(--ink-faint);
  border: 1px dashed var(--line-strong);
  transition: color 120ms var(--ease), border-color 120ms var(--ease);
}

.add-chapter:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.editor-pane {
  flex: 1;
  min-width: 0;
  background: var(--paper);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.sheet {
  width: 100%;
  max-width: var(--measure);
  padding: 104px 24px 200px;
}

.prose {
  font-family: var(--font-book);
  color: var(--ink);
  font-optical-sizing: auto;
}

.chapter-opener {
  text-align: center;
  margin: 0 0 3.4rem;
}

.chapter-num {
  font-family: var(--font-ui);
  font-size: var(--t-1);
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.chapter-title {
  font-weight: 500;
  font-size: 31px;
  line-height: 1.16;
  letter-spacing: -0.01em;
  margin: 15px 0 0;
}

.prose p {
  font-size: 19px;
  line-height: 1.68;
  margin: 0;
  text-align: justify;
  hyphens: auto;
  -webkit-hyphens: auto;
}

.prose p[data-indent="true"] {
  text-indent: 1.3em;
}

.prose .first::first-letter {
  float: left;
  font-size: 3.1em;
  line-height: 0.82;
  padding: 0.05em 0.09em 0 0;
  font-weight: 500;
}

.prose a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 2px;
  cursor: pointer;
}

.prose blockquote {
  margin: 1.7rem 0;
  padding-left: 1.2rem;
  border-left: 2px solid var(--line-strong);
  font-style: italic;
  color: var(--ink-soft);
}

.prose blockquote p {
  text-indent: 0;
  font-size: 18px;
}

.scene-break {
  text-align: center;
  margin: 2.1rem 0;
  color: var(--ink-faint);
  font-size: 17px;
  letter-spacing: 0.5em;
}

.dock {
  width: var(--pane-dock);
  flex: none;
  background: var(--shell);
  border-left: 1px solid var(--line);
  overflow-y: auto;
  padding: 26px 28px 80px;
}

.dock-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.dock-head .label {
  font-size: var(--t-1);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.dock-head .meta {
  font-size: var(--t-1);
  color: var(--ink-faint);
  font-variant-numeric: tabular-nums;
}

.dock-tools {
  display: flex;
  align-items: center;
  gap: 10px;
}

.trim-select {
  font-family: var(--font-ui);
  font-size: var(--t-2);
  color: var(--ink-soft);
  background: var(--raised);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 4px 8px;
  cursor: pointer;
}

.trim-select:hover {
  border-color: var(--line-strong);
}

.trim-select:focus {
  outline: none;
  border-color: var(--accent);
}

.page {
  background: #fffefb;
  border: 1px solid var(--line);
  border-radius: 2px;
  box-shadow: var(--shadow-page);
  aspect-ratio: 6 / 9;
  padding: 11% 12%;
  overflow: hidden;
}

.page .p-opener {
  text-align: center;
  margin-bottom: 15px;
}

.page .p-num {
  font-family: var(--font-ui);
  font-size: 6px;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.page .p-title {
  font-family: var(--font-book);
  font-size: 12px;
  margin-top: 5px;
}

.page p {
  font-family: var(--font-book);
  font-size: 6.6px;
  line-height: 1.5;
  text-align: justify;
  hyphens: auto;
  margin: 0;
  color: #2b2720;
}

.page p[data-indent="true"] {
  text-indent: 1.2em;
}

.page .folio {
  text-align: center;
  font-family: var(--font-book);
  font-size: 6px;
  color: var(--ink-faint);
  margin-top: 16px;
}

::-webkit-scrollbar {
  width: 11px;
  height: 11px;
}

::-webkit-scrollbar-thumb {
  background: var(--line-strong);
  border-radius: 6px;
  border: 3px solid transparent;
  background-clip: content-box;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--ink-faint);
  background-clip: content-box;
}

::-webkit-scrollbar-track {
  background: transparent;
}

.chapter-title-input {
  width: 100%;
  margin: 15px 0 0;
  padding: 0;
  border: 0;
  background: transparent;
  text-align: center;
  font-family: var(--font-book);
  font-weight: 500;
  font-size: 31px;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.chapter-title-input:focus {
  outline: none;
}

.chapter-title-input::placeholder {
  color: var(--ink-faint);
}

.chapter-title-input:disabled {
  color: var(--ink-faint);
  -webkit-text-fill-color: var(--ink-faint);
}

.no-title-check {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 14px;
  font-family: var(--font-ui);
  font-size: var(--t-2);
  color: var(--ink-faint);
  cursor: pointer;
  user-select: none;
}

.no-title-check input {
  width: 14px;
  height: 14px;
  cursor: pointer;
  accent-color: var(--ink-soft);
}

.editor-host,
.ProseMirror {
  outline: none;
}

.ProseMirror {
  min-height: 62vh;
}

.ProseMirror hr {
  border: none;
  border-top: 1px solid var(--line-strong);
  width: 56px;
  margin: 2rem auto;
}

.ProseMirror p.is-editor-empty:first-child::before {
  content: attr(data-placeholder);
  color: var(--ink-faint);
  float: left;
  height: 0;
  pointer-events: none;
}

.page-body hr {
  border: none;
  border-top: 1px solid var(--line-strong);
  width: 22px;
  margin: 9px auto;
}

.editor-toolbar {
  position: sticky;
  bottom: 22px;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 1px;
  padding: 5px;
  background: var(--glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: var(--shadow-pop);
}

.tool {
  min-width: 32px;
  height: 32px;
  padding: 0 9px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  color: var(--ink-soft);
  font-family: var(--font-book);
  font-size: 15px;
  transition: background 120ms var(--ease), color 120ms var(--ease);
}

.tool:hover {
  background: var(--accent-wash);
  color: var(--ink);
}

.tool[data-on="true"] {
  background: var(--accent);
  color: var(--accent-contrast);
}

.tool-sep {
  width: 1px;
  height: 18px;
  background: var(--line);
  margin: 0 5px;
}

.tool-wrap {
  position: relative;
  display: inline-flex;
}

.link-pop-backdrop {
  position: fixed;
  inset: 0;
  z-index: 6;
}

.link-pop {
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%);
  z-index: 7;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 5px;
  background: var(--glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: var(--shadow-pop);
}

.link-input {
  width: 220px;
  height: 28px;
  padding: 0 12px;
  border: none;
  background: transparent;
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: var(--t-2);
}

.link-input::placeholder {
  color: var(--ink-faint);
}

.link-btn {
  height: 28px;
  padding: 0 12px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-contrast);
  font-family: var(--font-ui);
  font-size: var(--t-2);
  font-weight: 600;
  transition: opacity 120ms var(--ease);
}

.link-btn:hover {
  opacity: 0.85;
}

.link-btn.ghost {
  padding: 0 8px;
  background: transparent;
  color: var(--ink-soft);
}

.link-btn.ghost:hover {
  background: var(--accent-wash);
  color: var(--ink);
  opacity: 1;
}

.figure {
  margin: 1.8rem auto;
}

.figure img {
  display: block;
  width: 100%;
  border-radius: 2px;
}

.figure[data-placement="float-top"] {
  float: right;
  width: 46%;
  margin: 0.2rem 0 1rem 1.4rem;
}

.figure[data-placement="inline"] {
  width: 62%;
  margin-inline: auto;
}

.figure-frame {
  position: relative;
  background: var(--sidebar);
  border-radius: 3px;
  overflow: hidden;
}

.figure-handle {
  position: absolute;
  right: 6px;
  bottom: 6px;
  width: 14px;
  height: 14px;
  border-radius: 3px;
  background: var(--accent);
  border: 2px solid var(--accent-contrast);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  cursor: nwse-resize;
}

.figure-empty {
  aspect-ratio: 3 / 2;
  display: grid;
  place-items: center;
  font-family: var(--font-ui);
  font-size: var(--t-2);
  color: var(--ink-faint);
}

.figure-caption {
  display: block;
  width: 100%;
  margin-top: 9px;
  border: 0;
  background: transparent;
  text-align: center;
  font-family: var(--font-ui);
  font-size: var(--t-2);
  color: var(--ink-soft);
}

.figure-caption:focus {
  outline: none;
}

.figure-caption::placeholder {
  color: var(--ink-faint);
}

.figure[data-selected="true"] .figure-frame {
  box-shadow: 0 0 0 2px var(--accent);
}

.figure-controls {
  display: flex;
  flex-wrap: nowrap;
  gap: 4px;
  justify-content: center;
  margin-top: 9px;
}

.figure-controls button {
  flex-shrink: 0;
  white-space: nowrap;
  font-family: var(--font-ui);
  font-size: var(--t-1);
  padding: 5px 10px;
  border-radius: 999px;
  color: var(--ink-soft);
  background: var(--sidebar);
  transition: background 120ms var(--ease), color 120ms var(--ease);
}

.figure-controls button[data-on="true"] {
  background: var(--accent);
  color: var(--accent-contrast);
}

.figure-width {
  align-self: center;
  margin-left: 2px;
  font-family: var(--font-ui);
  font-size: var(--t-1);
  color: var(--ink-faint);
  font-variant-numeric: tabular-nums;
}

.pdf-pages {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.pdf-page {
  display: block;
  border-radius: 2px;
  box-shadow: var(--shadow-page);
}

.dock-error {
  white-space: pre-wrap;
  font-family: var(--font-ui);
  font-size: var(--t-2);
  line-height: 1.5;
  color: var(--accent-ink);
  background: var(--accent-wash);
  padding: 12px 14px;
  border-radius: var(--r-sm);
  margin: 0;
}

.dock-empty {
  font-family: var(--font-ui);
  font-size: var(--t-2);
  color: var(--ink-faint);
  text-align: center;
  padding: 44px 0;
}

.overlay {
  position: fixed;
  inset: 0;
  z-index: 20;
  background: rgba(35, 32, 27, 0.28);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
  display: grid;
  place-items: center;
  padding: 40px;
}

.panel {
  width: 480px;
  max-width: 100%;
  max-height: 100%;
  display: flex;
  flex-direction: column;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-pop);
  overflow: hidden;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 14px 16px 22px;
  border-bottom: 1px solid var(--line);
}

.panel-head h2 {
  margin: 0;
  font-family: var(--font-book);
  font-weight: 500;
  font-size: 18px;
}

.panel-body {
  display: flex;
  flex-direction: column;
  gap: 15px;
  padding: 20px 22px 24px;
  overflow-y: auto;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field-label {
  font-family: var(--font-ui);
  font-size: var(--t-1);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.field input,
.field select {
  font-family: var(--font-ui);
  font-size: var(--t-4);
  color: var(--ink);
  background: var(--raised);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  padding: 9px 11px;
}

.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--accent);
}

.field-row {
  display: flex;
  gap: 14px;
}

.field-row .field {
  flex: 1;
}

.check {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-ui);
  font-size: var(--t-3);
  color: var(--ink-soft);
}

.check input {
  width: 15px;
  height: 15px;
  accent-color: var(--accent);
}

.doc-title {
  cursor: pointer;
}

.doc-title:hover {
  color: var(--ink);
}

.menu-wrap {
  position: relative;
}

.menu-backdrop {
  position: fixed;
  inset: 0;
  z-index: 25;
}

.menu {
  position: absolute;
  top: 36px;
  right: 0;
  z-index: 30;
  min-width: 156px;
  display: flex;
  flex-direction: column;
  padding: 5px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-pop);
}

.menu button {
  text-align: left;
  padding: 8px 11px;
  border-radius: var(--r-sm);
  font-family: var(--font-ui);
  font-size: var(--t-3);
  color: var(--ink-soft);
}

.menu button:hover {
  background: var(--accent-wash);
  color: var(--ink);
}

.menu button[data-on="true"] {
  color: var(--accent);
}

.export-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  background: rgba(35, 32, 27, 0.32);
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
}

.export-overlay p {
  margin: 0;
  font-family: var(--font-ui);
  font-size: var(--t-3);
  color: #fcfbf7;
}

.spinner {
  width: 34px;
  height: 34px;
  border: 3px solid rgba(255, 255, 255, 0.28);
  border-top-color: #fcfbf7;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.toast {
  position: fixed;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 40;
  max-width: 460px;
  padding: 11px 16px;
  border-radius: var(--r-md);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-ui);
  font-size: var(--t-3);
  box-shadow: var(--shadow-pop);
  cursor: pointer;
}

.library {
  height: 100vh;
  overflow-y: auto;
  background: var(--shell);
}

.library-head {
  height: 44px;
}

.shelf {
  max-width: 1040px;
  margin: 0 auto;
  padding: 26px 44px 80px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(168px, 1fr));
  gap: 28px;
}

.card {
  position: relative;
  aspect-ratio: 5 / 7;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 22px 18px;
  text-align: center;
  border-radius: 4px;
  cursor: pointer;
  transition: transform 140ms var(--ease), box-shadow 140ms var(--ease);
}

.card:hover {
  transform: translateY(-3px);
}

.card-book,
.card-example {
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-page);
}

.card-book:hover,
.card-example:hover {
  box-shadow: 0 4px 10px rgba(35, 32, 27, 0.1), 0 20px 38px rgba(35, 32, 27, 0.13);
}

.card-title {
  font-family: var(--font-book);
  font-size: 20px;
  font-weight: 500;
  line-height: 1.18;
  color: var(--ink);
}

.card-author {
  font-family: var(--font-ui);
  font-size: var(--t-2);
  color: var(--ink-soft);
}

.card-badge {
  font-family: var(--font-ui);
  font-size: var(--t-1);
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.card-action {
  background: transparent;
  border: 1px dashed var(--line-strong);
  color: var(--ink-faint);
  font-family: var(--font-ui);
  font-size: var(--t-3);
}

.card-action:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.card-menu {
  position: absolute;
  top: 8px;
  right: 8px;
  opacity: 0;
}

.card-book:hover .card-menu,
.card-menu[data-open="true"] {
  opacity: 1;
}

.panel-foot {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 14px 22px;
  border-top: 1px solid var(--line);
}

.panel-confirm {
  width: 420px;
}

.confirm-text {
  margin: 0;
  font-size: var(--t-4);
  line-height: 1.5;
  color: var(--ink-soft);
}

.confirm-text strong {
  font-weight: 600;
  color: var(--ink);
}

.btn-primary,
.btn-ghost,
.btn-danger {
  font-family: var(--font-ui);
  font-size: var(--t-3);
  font-weight: 500;
  padding: 9px 20px;
  border-radius: var(--r-sm);
  transition: background 120ms var(--ease), color 120ms var(--ease);
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-contrast);
}

.btn-primary:hover {
  background: var(--accent-ink);
}

.btn-ghost {
  color: var(--ink-soft);
}

.btn-ghost:hover {
  background: var(--accent-wash);
  color: var(--ink);
}

.btn-danger {
  background: var(--danger);
  color: var(--danger-contrast);
}

.btn-danger:hover {
  background: var(--danger-ink);
}

/* Cover */
.cover-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 11px;
  margin: 2px 10px 4px;
  padding: 8px 12px;
  border-radius: var(--r-sm);
  color: var(--ink-soft);
  font-family: var(--font-ui);
  font-size: var(--t-3);
  cursor: pointer;
  transition: background 120ms var(--ease), color 120ms var(--ease);
}

.cover-item .title {
  font-weight: 500;
}

.cover-item svg {
  color: var(--ink-faint);
}

.cover-item:hover {
  background: var(--accent-wash);
  color: var(--ink);
}

.cover-item[data-active="true"] {
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 1px 2px rgba(35, 32, 27, 0.05);
}

.cover-item[data-active="true"] svg {
  color: var(--accent);
}

.cover-item[data-active="true"]::before {
  content: "";
  position: absolute;
  left: -10px;
  top: 8px;
  bottom: 8px;
  width: 3px;
  background: var(--accent);
  border-radius: 0 2px 2px 0;
}

.cover-pane {
  width: 100%;
  max-width: var(--measure);
  padding: 64px 24px 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
}

.cover-stage {
  width: 100%;
  display: flex;
  justify-content: center;
}

.cover-art {
  width: min(360px, 80%);
  container-type: size;
  position: relative;
  overflow: hidden;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-page);
}

.cover-face {
  width: 100%;
  height: 100%;
}

.cover-face-image {
  object-fit: cover;
  display: block;
}

.cover-face-default {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 12cqw 10cqw;
}

.cover-stack {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.cover-title {
  font-family: var(--font-book);
  font-weight: 500;
  font-size: 9.5cqw;
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 0;
}

.cover-rule {
  display: block;
  width: 15cqw;
  height: 1px;
  margin: 5.5cqw 0;
  opacity: 0.7;
}

.cover-subtitle {
  font-family: var(--font-book);
  font-style: italic;
  font-size: 4.6cqw;
  line-height: 1.3;
  margin: 0;
  opacity: 0.84;
}

.cover-author {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 9cqw;
  margin: 0;
  padding: 0 8cqw;
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 3.4cqw;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  opacity: 0.92;
}

.cover-controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.cover-palettes {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
}

.cover-swatch {
  width: 34px;
  height: 34px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line-strong);
  font-family: var(--font-book);
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 120ms var(--ease), box-shadow 120ms var(--ease);
}

.cover-swatch:hover {
  transform: translateY(-1px);
}

.cover-swatch[data-on="true"] {
  box-shadow: 0 0 0 2px var(--paper), 0 0 0 4px var(--accent);
}

.cover-color {
  width: 34px;
  height: 34px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line-strong);
  overflow: hidden;
  position: relative;
  cursor: pointer;
}

.cover-color input {
  position: absolute;
  inset: -4px;
  width: calc(100% + 8px);
  height: calc(100% + 8px);
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
}

.cover-actions {
  display: flex;
  gap: 10px;
}

.cover-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 14px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line-strong);
  background: var(--raised);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: var(--t-3);
  font-weight: 500;
  cursor: pointer;
  transition: border-color 120ms var(--ease), color 120ms var(--ease);
}

.cover-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.cover-hint {
  margin: 0;
  font-family: var(--font-ui);
  font-size: var(--t-2);
  color: var(--ink-faint);
  text-align: center;
}

/* Add-page menu + front/back matter sections */
.add-page {
  margin: 2px 12px 2px;
  padding: 8px 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-radius: var(--r-sm);
  font-family: var(--font-ui);
  font-size: var(--t-3);
  color: var(--ink-faint);
  transition: background 120ms var(--ease), color 120ms var(--ease);
}

.add-page:hover,
.add-page[data-open="true"] {
  background: var(--accent-wash);
  color: var(--ink);
}

.add-page-pop {
  position: fixed;
  z-index: 50;
  min-width: 178px;
  max-height: 72vh;
  overflow-y: auto;
  padding: 6px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-pop);
}

.add-page-group + .add-page-group {
  margin-top: 4px;
  border-top: 1px solid var(--line);
  padding-top: 4px;
}

.add-page-label {
  padding: 6px 10px 3px;
  font-family: var(--font-ui);
  font-size: var(--t-1);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.add-page-item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 7px 10px;
  border-radius: var(--r-sm);
  font-family: var(--font-ui);
  font-size: var(--t-3);
  color: var(--ink-soft);
  transition: background 120ms var(--ease), color 120ms var(--ease);
}

.add-page-item:hover {
  background: var(--accent-wash);
  color: var(--ink);
}

.nav-scroll {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.nav-scroll .chapters {
  flex: none;
  overflow: visible;
}

.nav-section + .nav-section {
  margin-top: 6px;
}

.chapter-drop {
  margin: 2px 0;
  padding: 9px 12px;
  border-radius: var(--r-sm);
  border: 1px dashed var(--line-strong);
  color: var(--ink-faint);
  font-size: var(--t-2);
  text-align: center;
  transition: border-color 120ms var(--ease), color 120ms var(--ease), background 120ms var(--ease);
}

.chapter-drop[data-on="true"] {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-wash);
}

.find-bar {
  position: fixed;
  top: 54px;
  right: 18px;
  z-index: 30;
  display: flex;
  align-items: flex-start;
  gap: 4px;
  padding: 7px;
  background: var(--glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-pop);
  animation: find-drop 140ms var(--ease);
}

@keyframes find-drop {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.find-expand {
  flex: none;
  width: 20px;
  align-self: stretch;
  display: grid;
  place-items: center;
  border-radius: var(--r-sm);
  color: var(--ink-faint);
  transition: background 120ms var(--ease), color 120ms var(--ease);
}

.find-expand:hover {
  background: var(--accent-wash);
  color: var(--ink);
}

.find-stack {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.find-row {
  display: flex;
  align-items: center;
  gap: 4px;
}

.find-input {
  width: 196px;
  height: 28px;
  padding: 0 10px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  background: var(--raised);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: var(--t-2);
}

.find-input::placeholder {
  color: var(--ink-faint);
}

.find-input:focus {
  outline: none;
  border-color: var(--accent);
}

.find-count {
  min-width: 66px;
  padding: 0 4px;
  font-size: var(--t-1);
  color: var(--ink-faint);
  white-space: nowrap;
  text-align: right;
}

.find-btn {
  width: 26px;
  height: 26px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: var(--r-sm);
  color: var(--ink-soft);
  transition: background 120ms var(--ease), color 120ms var(--ease);
}

.find-btn:hover:not(:disabled) {
  background: var(--accent-wash);
  color: var(--ink);
}

.find-btn:disabled {
  opacity: 0.4;
  cursor: default;
}

.find-toggle {
  height: 26px;
  min-width: 28px;
  padding: 0 6px;
  display: grid;
  place-items: center;
  border-radius: var(--r-sm);
  color: var(--ink-soft);
  font-family: var(--font-ui);
  font-size: var(--t-2);
  font-weight: 600;
  transition: background 120ms var(--ease), color 120ms var(--ease);
}

.find-toggle:hover {
  background: var(--accent-wash);
  color: var(--ink);
}

.find-toggle[data-on="true"] {
  background: var(--accent);
  color: var(--accent-contrast);
}

.find-ww {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.find-action {
  height: 28px;
  padding: 0 12px;
  border-radius: var(--r-sm);
  background: var(--accent-wash);
  color: var(--ink-soft);
  font-family: var(--font-ui);
  font-size: var(--t-2);
  font-weight: 600;
  white-space: nowrap;
  transition: background 120ms var(--ease), color 120ms var(--ease);
}

.find-action:hover:not(:disabled) {
  background: var(--accent);
  color: var(--accent-contrast);
}

.find-action:disabled {
  opacity: 0.4;
  cursor: default;
}

.find-scope {
  height: 28px;
  padding: 0 10px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line-strong);
  color: var(--ink-soft);
  font-family: var(--font-ui);
  font-size: var(--t-1);
  white-space: nowrap;
  transition: background 120ms var(--ease), color 120ms var(--ease);
}

.find-scope:hover {
  background: var(--accent-wash);
  color: var(--ink);
}

.search-match {
  background: var(--accent-wash);
  border-radius: 2px;
}

.search-match-current {
  background: var(--selection);
  border-radius: 2px;
  box-shadow: 0 0 0 1.5px var(--accent);
}

.proof-mark {
  cursor: pointer;
  border-radius: 2px;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
  transition: filter 120ms var(--ease);
}

.proof-mark.sev-error {
  background: rgba(180, 69, 58, 0.13);
  text-decoration-color: #b4453a;
}

.proof-mark.sev-warn {
  background: rgba(168, 119, 24, 0.16);
  text-decoration-color: #9c6e16;
}

.proof-mark.sev-suggest {
  background: rgba(47, 110, 79, 0.13);
  text-decoration-color: #2f6e4f;
}

.proof-mark:hover {
  filter: brightness(0.96);
}

[data-theme="dark"] .proof-mark.sev-error {
  background: rgba(217, 122, 111, 0.2);
  text-decoration-color: #d97a6f;
}

[data-theme="dark"] .proof-mark.sev-warn {
  background: rgba(217, 164, 65, 0.2);
  text-decoration-color: #d9a441;
}

[data-theme="dark"] .proof-mark.sev-suggest {
  background: rgba(111, 174, 132, 0.2);
  text-decoration-color: #6fae84;
}

[data-theme="dark"] .proof-mark:hover {
  filter: brightness(1.18);
}

.proof-pop {
  position: fixed;
  z-index: 50;
  padding: 8px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-pop);
}

.proof-pop-kind {
  display: inline-block;
  margin: 0 0 6px 2px;
  padding: 2px 8px;
  border-radius: 999px;
  font-family: var(--font-ui);
  font-size: var(--t-1);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.proof-pop-kind.sev-error {
  background: rgba(180, 69, 58, 0.14);
  color: var(--danger-ink);
}

.proof-pop-kind.sev-warn {
  background: rgba(168, 119, 24, 0.16);
  color: #8a6012;
}

.proof-pop-kind.sev-suggest {
  background: rgba(47, 110, 79, 0.14);
  color: #2c6048;
}

[data-theme="dark"] .proof-pop-kind.sev-error {
  color: #e58e84;
}

[data-theme="dark"] .proof-pop-kind.sev-warn {
  color: #e0bb6b;
}

[data-theme="dark"] .proof-pop-kind.sev-suggest {
  color: #8fc6a3;
}

.proof-pop-msg {
  padding: 2px 4px 8px;
  font-family: var(--font-ui);
  font-size: var(--t-2);
  color: var(--ink-soft);
  line-height: 1.4;
}

.proof-pop-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.proof-suggestion {
  padding: 5px 10px;
  border-radius: var(--r-sm);
  background: var(--accent-wash);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: var(--t-2);
  font-weight: 600;
  transition: background 120ms var(--ease), color 120ms var(--ease);
}

.proof-suggestion:hover {
  background: var(--accent);
  color: var(--accent-contrast);
}

.proof-pop-actions {
  display: flex;
  gap: 4px;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

.proof-action {
  flex: 1;
  padding: 6px 8px;
  border-radius: var(--r-sm);
  font-family: var(--font-ui);
  font-size: var(--t-1);
  color: var(--ink-soft);
  transition: background 120ms var(--ease), color 120ms var(--ease);
}

.proof-action:hover {
  background: var(--accent-wash);
  color: var(--ink);
}

.device-stage {
  max-width: 420px;
  margin: 0 auto;
  padding-block: 6px;
  container-type: inline-size;
}

.device-frame {
  --dv-scale: calc(100cqi / 380);
  width: 100%;
  padding: calc(var(--dv-bezel-w) * var(--dv-scale));
  background: var(--dv-bezel);
  border-radius: calc(var(--dv-radius) * var(--dv-scale));
  box-shadow: var(--shadow-page);
}

.device-screen {
  aspect-ratio: var(--dv-aspect);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--dv-bg);
  color: var(--dv-ink);
  border-radius: calc(max(0px, (var(--dv-radius) - var(--dv-bezel-w)) * var(--dv-scale)));
}

.device-statusbar {
  flex: none;
  height: calc(30 * var(--dv-scale));
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 calc(18 * var(--dv-scale));
  font-family: var(--font-ui);
  font-size: calc(11 * var(--dv-scale));
  font-weight: 600;
  color: var(--dv-ink);
}

.device-clock {
  letter-spacing: 0.01em;
}

.device-batt {
  position: relative;
  flex: none;
  width: calc(22 * var(--dv-scale));
  height: calc(11 * var(--dv-scale));
  border: calc(1.4 * var(--dv-scale)) solid var(--dv-ink);
  border-radius: calc(3 * var(--dv-scale));
  opacity: 0.7;
}

.device-batt::before {
  content: "";
  position: absolute;
  top: calc(1.5 * var(--dv-scale));
  bottom: calc(1.5 * var(--dv-scale));
  left: calc(1.5 * var(--dv-scale));
  width: 55%;
  background: var(--dv-ink);
  border-radius: 1px;
}

.device-batt::after {
  content: "";
  position: absolute;
  right: calc(-3 * var(--dv-scale));
  top: 30%;
  height: 40%;
  width: calc(2 * var(--dv-scale));
  border-radius: 1px;
  background: var(--dv-ink);
}

.device-content {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: calc(var(--dv-my) * var(--dv-scale)) calc(var(--dv-mx) * var(--dv-scale));
  font-family: var(--font-book);
  font-size: calc(var(--dv-fs) * var(--dv-scale));
  line-height: var(--dv-lh);
}

.device-frame[data-kind="eink"] .device-content::-webkit-scrollbar {
  display: none;
}

.device-opener {
  text-align: center;
  margin-bottom: calc(20 * var(--dv-scale));
}

.device-eyebrow {
  font-family: var(--font-ui);
  font-size: calc(10 * var(--dv-scale));
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  opacity: 0.5;
  margin-bottom: calc(8 * var(--dv-scale));
}

.device-title {
  font-family: var(--font-book);
  font-weight: 500;
  font-size: calc(24 * var(--dv-scale));
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.device-body p {
  font-family: var(--font-book);
  hyphens: auto;
  margin: 0 0 0.8em;
  color: var(--dv-ink);
}

.device-body p[data-indent="true"] {
  text-indent: 1.2em;
}

.device-frame[data-kind="eink"] .device-body p {
  text-align: justify;
}

.device-frame[data-kind="phone"] .device-body p,
.device-frame[data-kind="tablet"] .device-body p {
  text-align: left;
}

.device-body h1,
.device-body h2,
.device-body h3 {
  font-family: var(--font-book);
  font-weight: 600;
  line-height: 1.25;
  margin: 1.2em 0 0.5em;
}

.device-body blockquote {
  margin: 0 0 0.8em;
  padding-left: 1em;
  border-left: 2px solid currentColor;
  font-style: italic;
  opacity: 0.85;
}

.device-body hr {
  border: none;
  border-top: 1px solid currentColor;
  width: calc(40 * var(--dv-scale));
  margin: calc(16 * var(--dv-scale)) auto;
  opacity: 0.3;
}

.device-body img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0.8em auto;
}

.device-footer {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: calc(10 * var(--dv-scale));
  padding: calc(8 * var(--dv-scale)) calc(var(--dv-mx) * var(--dv-scale));
  font-family: var(--font-ui);
  font-size: calc(11 * var(--dv-scale));
  color: var(--dv-ink);
  opacity: 0.55;
}

.device-foot-title {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.device-content .cover-art {
  width: 100%;
  margin: auto;
  box-shadow: none;
  border: none;
  border-radius: 0;
}