/* Paper base components — pair with tokens.css. Values follow the SwiftUI
   DesignSystem controls; every colour, size and radius is a token. */

/* ---- PaperButton: sans, sharp, verb-led ---- */
.paper-button {
  font-family: var(--paper-font-interface);
  font-size: var(--paper-size-metadata);
  font-weight: var(--paper-weight-medium);
  line-height: 1.2;
  padding: var(--paper-space-xs) var(--paper-space-sm);
  border: var(--paper-line-control) solid var(--paper-border-strong);
  border-radius: var(--paper-radius-button);
  background: var(--paper-bg-raised);
  color: var(--paper-text-primary);
  cursor: pointer;
  transition: background var(--paper-motion-fast) var(--paper-ease),
    border-color var(--paper-motion-fast) var(--paper-ease);
}

/* Native mobile keeps the compact Paper treatment but gives the whole control
   the same 44px interaction box as SwiftUI. Desktop retains its denser chrome. */
:root[data-mobile-host="true"] .paper-button {
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
}

.paper-button:hover:not(:disabled) {
  border-color: var(--paper-ink-blue);
}

.paper-button:focus-visible {
  outline: 2px solid var(--paper-focus-ring);
  outline-offset: 1px;
}

.paper-button:disabled {
  opacity: var(--paper-opacity-disabled);
  cursor: default;
}

.paper-button--primary {
  background: var(--paper-ink-blue);
  border-color: var(--paper-ink-blue);
  color: var(--paper-text-on-accent);
}

.paper-button--primary:hover:not(:disabled) {
  filter: brightness(1.08);
}

.paper-button--destructive {
  color: var(--paper-destructive);
  border-color: var(--paper-destructive);
  background: transparent;
}

.paper-button--destructive:hover:not(:disabled) {
  border-color: var(--paper-destructive);
  background: color-mix(in srgb, var(--paper-destructive) 8%, transparent);
}

/* ---- PaperTextField ---- */
.paper-field {
  display: flex;
  flex-direction: column;
  gap: var(--paper-space-xxs);
}

.paper-field__label {
  font-size: var(--paper-size-metadata);
  font-weight: var(--paper-weight-medium);
  color: var(--paper-text-secondary);
}

/* Sharp paper field (PaperInputFieldStyle): hairline box, a 3:1 bottom rule
   that identifies the input, and a 2px ink-blue bottom rule on focus. */
.paper-field__input {
  font-family: var(--paper-font-interface);
  font-size: var(--paper-size-body);
  padding: var(--paper-space-xs) var(--paper-space-xsm);
  border: var(--paper-line-control) solid var(--paper-divider-list);
  border-bottom-color: var(--paper-border-control);
  border-radius: var(--paper-radius-button);
  background: var(--paper-bg-raised);
  color: var(--paper-text-primary);
  transition: border-color var(--paper-motion-fast) var(--paper-ease),
    box-shadow var(--paper-motion-fast) var(--paper-ease);
}

.paper-field__input::placeholder {
  color: var(--paper-text-tertiary);
}

.paper-field__input:hover:not(:disabled):not(:focus) {
  background: color-mix(in srgb, var(--paper-hover-wash) 100%, var(--paper-bg-raised));
}

.paper-field__input:focus-visible,
.paper-field__input:focus {
  outline: none;
  border-bottom-color: var(--paper-ink-blue);
  box-shadow: inset 0 -1px 0 var(--paper-ink-blue);
}

/* Editorial underline variant — a plain field with a single low-opacity ink
   rule that strengthens (not recolors) on focus. Used for the Text composer
   title (Mac TextNoteTitleField). Chrome stays neutral ink, never accent. */
.paper-field__input--underline {
  border: none;
  border-bottom: var(--paper-line-control) solid var(--paper-border-control);
  border-radius: 0;
  background: transparent;
  padding-left: 0;
  padding-right: 0;
  transition: border-color var(--paper-motion-fast) var(--paper-ease);
}

.paper-field__input--underline:focus-visible,
.paper-field__input--underline:focus {
  outline: none;
  box-shadow: none;
  border-bottom-color: var(--paper-text-primary);
}

/* ---- FlatToolbarButton (Text composer formatting toolbar) ---- */
.paper-flat-toolbar-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
  width: 28px;
  height: 28px;
  padding: 0;
  border: none;
  border-radius: var(--paper-radius-button);
  background: transparent;
  color: color-mix(in srgb, var(--paper-text-primary) 60%, transparent);
  cursor: pointer;
  transition: background var(--paper-motion-fast) var(--paper-ease),
    color var(--paper-motion-fast) var(--paper-ease);
}

.paper-flat-toolbar-btn:hover:not(:disabled) {
  color: var(--paper-text-primary);
  background: var(--paper-hover-wash);
}

.paper-flat-toolbar-btn:focus-visible {
  outline: 2px solid var(--paper-focus-ring);
  outline-offset: -2px;
}

.paper-flat-toolbar-btn:disabled {
  opacity: var(--paper-opacity-disabled);
  cursor: default;
}

.paper-flat-toolbar-divider {
  flex: none;
  width: var(--paper-line-control);
  height: 20px;
  background: var(--paper-divider-section);
}

/* ---- PaperSectionHeader (small-caps + 2px underline + optional accent bar) ---- */
.paper-section-header {
  display: flex;
  align-items: center;
  gap: var(--paper-space-xs);
  font-size: var(--paper-size-small-caption);
  font-weight: var(--paper-weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--paper-track-stamp);
  color: var(--paper-text-secondary);
  padding-bottom: var(--paper-space-xxs);
  border-bottom: var(--paper-line-section) solid var(--paper-divider-section);
  margin: var(--paper-space-sm) 0 var(--paper-space-xs);
}
.paper-section-header__bar {
  width: 1.5px;
  height: 20px;
  /* Non-AI accent is a quiet hint, not a solid bar (Mac PaperSectionHeader). */
  background: color-mix(in srgb, var(--paper-ink-blue) 35%, transparent);
  flex: none;
  margin-right: var(--paper-space-xxs);
}
/* Flush variant — dense roster sub-headers (Speakers/People) omit the bar
   and the underline rule entirely (Mac shows a plain small-caps + count). */
.paper-section-header--flush {
  border-bottom: none;
}
.paper-section-header--ai {
  color: var(--paper-ai-text);
  border-bottom-color: color-mix(in srgb, var(--paper-ai) 35%, transparent);
}
.paper-section-header--ai .paper-section-header__bar {
  /* AI accent bar stays full-strength orange. */
  background: var(--paper-ai);
}
.paper-section-header__icon {
  flex: none;
  opacity: 0.75;
}
.paper-section-header__label {
  flex: 1;
}
.paper-section-header__ai {
  font-size: var(--paper-size-mini);
  font-weight: var(--paper-weight-bold);
  color: var(--paper-ai-text);
  letter-spacing: var(--paper-track-stamp);
}
.paper-section-header__count {
  font-variant-numeric: tabular-nums;
  color: var(--paper-text-tertiary);
  font-weight: var(--paper-weight-regular);
}

/* ---- EditorialTitle (content title: 20px sans medium, optional 0.5px rule) ---- */
.paper-editorial-title {
  font-size: var(--paper-size-large-title);
  font-weight: var(--paper-weight-medium);
  letter-spacing: -0.08px;
  margin: 0;
  color: var(--paper-text-primary);
}
.paper-editorial-title--underline {
  padding-bottom: var(--paper-space-xs);
  border-bottom: 0.5px solid var(--paper-divider-content);
}

/* ---- listPaneTopBar + editorialPaneTitleStyle (Mac PaperTopBar) ---- */
.paper-top-bar {
  position: relative;
  z-index: 2;
  flex: none;
  display: flex;
  align-items: flex-start;
  gap: var(--paper-space-sm);
  box-sizing: border-box;
  height: var(--paper-pane-header-height);
  padding: var(--paper-pane-header-inset) var(--paper-space-xsm) 0;
  /* Title-width rule lives on the lead/title. A full-width section
     divider here makes adjacent panes look like stacked toolbars. */
  border-bottom: none;
  color: var(--paper-text-primary);
}

.paper-top-bar__lead {
  display: inline-flex;
  align-items: flex-start;
  gap: var(--paper-space-xs);
  min-width: 0;
  min-height: 36px;
  color: var(--paper-text-primary);
  padding: 0 var(--paper-editorial-rule-overhang) var(--paper-space-xs) 0;
  box-shadow: inset 0 calc(-1 * var(--paper-line-editorial)) 0
    color-mix(in srgb, var(--paper-text-primary) 24%, transparent);
}

.paper-top-bar__lead > svg,
.paper-top-bar__lead > .paper-icon {
  flex: none;
  margin-top: 3px;
}

.paper-top-bar__spacer {
  flex: 1;
  min-width: var(--paper-space-xs);
}

.paper-pane-title {
  display: inline-block;
  margin: 0;
  font-family: var(--paper-font-editorial);
  font-size: var(--paper-size-pane-title);
  font-weight: var(--paper-weight-regular);
  letter-spacing: var(--paper-track-pane-title);
  line-height: 1.15;
  text-transform: none;
  color: var(--paper-text-primary);
  padding: 0 var(--paper-editorial-rule-overhang) var(--paper-space-xs) 0;
  box-shadow: inset 0 calc(-1 * var(--paper-line-editorial)) 0
    color-mix(in srgb, var(--paper-text-primary) 24%, transparent);
}

.paper-top-bar .paper-nav-header,
.paper-top-bar .paper-pane-title {
  font-family: var(--paper-font-editorial);
  font-size: var(--paper-size-pane-title);
  font-weight: var(--paper-weight-regular);
  letter-spacing: var(--paper-track-pane-title);
  line-height: 1.15;
  text-transform: none;
}

.paper-top-bar__lead .paper-pane-title,
.paper-top-bar__lead .paper-nav-header {
  display: inline;
  padding: 0;
  box-shadow: none;
}

.paper-top-bar > button,
.paper-top-bar > .detail-action-drawer {
  margin-top: 2px;
}

/* ---- Canonical Clevernotes and AI-feature lockups ---- */
.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: calc(var(--brand-mark-size) * 0.3);
  min-width: 0;
  color: var(--paper-text-primary);
  line-height: 1;
}

.brand-lockup__mark {
  flex: none;
  color: var(--paper-ai);
}

.brand-lockup__word {
  white-space: nowrap;
}

.brand-lockup--clevernotes .brand-lockup__word {
  font-family: var(--paper-font-interface);
  font-size: calc(var(--brand-mark-size) * 0.72);
  font-weight: var(--paper-weight-bold);
  letter-spacing: -0.025em;
}

.brand-lockup--feature .brand-lockup__word {
  font-family: var(--paper-font-mono);
  font-size: calc(var(--brand-mark-size) * 0.72);
  font-weight: var(--paper-weight-semibold);
  letter-spacing: var(--paper-track-stamp);
}

/* ---- PaperPane ---- */
.paper-pane {
  background: var(--paper-bg);
  border-radius: var(--paper-radius-pane); /* sharp */
  height: 100%;
  overflow: auto;
}

.paper-pane-divider {
  width: var(--paper-line-pane);
  background: var(--paper-divider-pane);
  flex: none;
}

/* ---- PaperListRow ---- */
/* Mac list pane: 16pt scroll air + 16pt row inset (PaperListRow +
   .padding(.horizontal, sm)). Detail reading uses the same 16pt gutter. */
.paper-list-scroll {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: var(--paper-space-sm) 0;
}

.paper-list-inset {
  margin-inline: var(--paper-space-sm);
}

.paper-detail-body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: var(--paper-space-sm);
}

.paper-list-row {
  display: flex;
  align-items: center;
  gap: var(--paper-space-xs);
  padding: var(--paper-space-xs) var(--paper-space-sm);
  border-bottom: var(--paper-line-row) solid var(--paper-divider-list);
  border-left: var(--paper-line-selection) solid transparent;
  cursor: default;
  transition:
    background var(--paper-motion-fast) var(--paper-ease),
    border-left-color var(--paper-motion-fast) var(--paper-ease);
}

.paper-list-row[data-selected="true"] {
  background: transparent;
  border-left-color: var(--paper-ink-blue);
}

.paper-list-row:hover {
  background: var(--paper-hover-wash);
}

.paper-list-row[data-selected="true"]:hover {
  background: var(--paper-hover-wash);
}

/* ---- Status + AI chips ---- */
.paper-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--paper-space-xxs);
  font-size: var(--paper-size-small-caption);
  padding: 1px var(--paper-space-xs);
  border-radius: var(--paper-radius-chip);
  border: var(--paper-line-control) solid transparent;
  background: color-mix(in srgb, var(--paper-text-primary) 6%, transparent);
  color: var(--paper-text-secondary);
}

.paper-chip--ai {
  /* AI-only orange — never use for non-AI affordances. Words use ai-text. */
  border-color: color-mix(in srgb, var(--paper-ai) 45%, transparent);
  color: var(--paper-ai-text);
  background: var(--paper-bg-ai);
}

.paper-status {
  display: inline-block;
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%; /* status indicators are one of the two round elements */
}

.paper-status--ok { background: var(--paper-status-ok); }
.paper-status--error { background: var(--paper-status-error); }
.paper-status--pending { background: var(--paper-status-pending); }
.paper-status--idle { background: var(--paper-border-control); }
.paper-status--unread { background: var(--paper-ink-blue); }
.paper-status--recording { background: var(--paper-error-rust); animation: paper-status-pulse 1.6s ease-in-out infinite; }
.paper-status--paused { background: var(--paper-error-rust); opacity: 0.4; }

@keyframes paper-status-pulse {
  0%,
  100% { opacity: 1; }
  50% { opacity: 0.35; }
}

@media (prefers-reduced-motion: reduce) {
  .paper-status--recording { animation: none; }
}

/* ---- PaperToggle: sharp track and square thumb (Paper ToggleStyle); ink-blue when on ---- */
.paper-toggle {
  --paper-toggle-pad: 2px;
  position: relative;
  flex: none;
  width: 36px;
  height: 20px;
  padding: 0;
  border: var(--paper-line-control) solid var(--paper-border-control);
  border-radius: var(--paper-radius-button);
  background: color-mix(in srgb, var(--paper-text-primary) 15%, transparent);
  cursor: pointer;
  transition: background var(--paper-motion-fast) var(--paper-ease),
    border-color var(--paper-motion-fast) var(--paper-ease);
}

.paper-toggle[data-checked="true"] {
  background: var(--paper-ink-blue);
  border-color: var(--paper-ink-blue);
}

.paper-toggle:focus-visible {
  outline: 2px solid var(--paper-focus-ring);
  outline-offset: 2px;
}

.paper-toggle:disabled {
  opacity: var(--paper-opacity-disabled);
  cursor: default;
}

.paper-toggle__thumb {
  position: absolute;
  top: var(--paper-toggle-pad);
  left: var(--paper-toggle-pad);
  width: 14px;
  height: 14px;
  border-radius: var(--paper-radius-button);
  background: var(--paper-bg-raised);
  border: 0.5px solid var(--paper-border-control);
  transition: transform var(--paper-motion-fast) var(--paper-ease);
}

.paper-toggle[data-checked="true"] .paper-toggle__thumb {
  transform: translateX(16px);
  background: var(--paper-text-on-accent);
}

/* ---- PaperSegmented: underlined choices (PaperSegmentedPicker) — ink-blue 2px rule on the selection ---- */
.paper-segmented {
  display: inline-flex;
  align-items: stretch;
  gap: var(--paper-space-sm);
}

.paper-segmented[data-disabled] {
  opacity: var(--paper-opacity-disabled);
}

.paper-segmented__segment {
  font-family: var(--paper-font-interface);
  font-size: var(--paper-size-small-body);
  font-weight: var(--paper-weight-regular);
  padding: var(--paper-space-xxs) 0;
  border: none;
  border-bottom: var(--paper-line-section) solid transparent;
  border-radius: 0;
  background: transparent;
  color: var(--paper-text-secondary);
  cursor: pointer;
  transition: color var(--paper-motion-fast) var(--paper-ease),
    border-color var(--paper-motion-fast) var(--paper-ease);
}

:root[data-mobile-host="true"] .paper-segmented__segment {
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
}

.paper-segmented__segment:hover:not(:disabled):not([data-selected="true"]) {
  color: var(--paper-text-primary);
}

.paper-segmented__segment[data-selected="true"] {
  color: var(--paper-ink-blue);
  border-bottom-color: var(--paper-ink-blue);
  font-weight: var(--paper-weight-semibold);
}

.paper-segmented__segment:focus-visible {
  outline: 2px solid var(--paper-focus-ring);
  outline-offset: 2px;
}

.paper-segmented__segment:disabled {
  cursor: default;
}

/* ---- PaperTabs (underlined editorial text tabs — entry-detail sections) ---- */
.paper-tabs {
  display: inline-flex;
  align-items: stretch;
  gap: var(--paper-space-sm);
  /* A quiet baseline rule the active underline sits on top of. */
  border-bottom: var(--paper-line-row) solid var(--paper-divider-content);
}

.paper-tabs__tab {
  font-family: var(--paper-font-interface);
  font-size: var(--paper-size-list-title);
  padding: var(--paper-space-xxs) 0;
  border: none;
  border-bottom: var(--paper-line-section) solid transparent;
  background: none;
  color: var(--paper-text-tertiary);
  cursor: pointer;
  transition: color var(--paper-motion-fast) var(--paper-ease),
    border-color var(--paper-motion-fast) var(--paper-ease);
  /* Pull the underline down over the strip's baseline rule. */
  margin-bottom: calc(-1 * var(--paper-line-row));
}

:root[data-mobile-host="true"] .paper-tabs__tab {
  display: inline-flex;
  align-items: center;
  gap: var(--paper-space-xxs);
  min-height: 44px;
}

.paper-tabs__tab:hover:not([data-selected="true"]) {
  color: var(--paper-text-secondary);
}

.paper-tabs__tab[data-selected="true"] {
  color: var(--paper-ink-blue);
  border-bottom-color: var(--paper-ink-blue);
}

.paper-tabs__tab:focus-visible {
  outline: 2px solid var(--paper-focus-ring);
  outline-offset: 2px;
}

/* ---- PaperSelect (native <select> with paper box + caret) ---- */
.paper-select {
  display: flex;
  flex-direction: column;
  gap: var(--paper-space-xxs);
}

.paper-select__label {
  font-size: var(--paper-size-metadata);
  font-weight: var(--paper-weight-medium);
  color: var(--paper-text-secondary);
}

.paper-select__box {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.paper-select__control {
  appearance: none;
  -webkit-appearance: none;
  font-family: var(--paper-font-interface);
  font-size: var(--paper-size-body);
  width: 100%;
  padding: var(--paper-space-xs) calc(var(--paper-space-sm) + 13px) var(--paper-space-xs)
    var(--paper-space-xsm);
  border: var(--paper-line-control) solid var(--paper-divider-list);
  border-bottom-color: var(--paper-border-control);
  border-radius: var(--paper-radius-button);
  background: var(--paper-bg-raised);
  color: var(--paper-text-primary);
  cursor: pointer;
}

.paper-select__control:focus-visible {
  outline: none;
  border-bottom-color: var(--paper-ink-blue);
  box-shadow: inset 0 -1px 0 var(--paper-ink-blue);
}

.paper-select__control:disabled {
  opacity: var(--paper-opacity-disabled);
  cursor: default;
}

.paper-select__caret {
  position: absolute;
  right: var(--paper-space-xsm);
  pointer-events: none;
  color: var(--paper-text-tertiary);
}

/* ---- PaperSettingGroup + PaperSettingRow (SwiftUI Form parity) ---- */
.paper-setting-group {
  display: flex;
  flex-direction: column;
}

.paper-setting-group__rows {
  display: flex;
  flex-direction: column;
}

.paper-setting-group__rows > .paper-setting-row:not(:last-child) {
  border-bottom: var(--paper-line-row) solid var(--paper-divider-list);
}

.paper-setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--paper-space-sm);
  min-height: 44px;
  padding: var(--paper-space-xs) 0;
}

.paper-setting-row__text {
  display: flex;
  flex-direction: column;
  gap: var(--paper-space-xxs);
  min-width: 0;
}

.paper-setting-row__label {
  color: var(--paper-text-primary);
}

.paper-setting-row__help {
  color: var(--paper-text-tertiary);
}

.paper-setting-row__control {
  flex: none;
  display: flex;
  align-items: center;
}

.paper-setting-row[data-disabled] .paper-setting-row__label,
.paper-setting-row[data-disabled] .paper-setting-row__help {
  opacity: 0.5;
}

/* ---- PaperKeycap (monospace keyboard chord) ---- */
.paper-keycap {
  display: inline-flex;
  align-items: center;
  gap: var(--paper-space-xxs);
}

.paper-keycap__key {
  font-family: var(--paper-font-mono);
  font-size: var(--paper-size-small-caption);
  font-variant-numeric: tabular-nums;
  line-height: 1;
  min-width: 18px;
  padding: 3px var(--paper-space-xxs);
  text-align: center;
  border: var(--paper-line-control) solid var(--paper-border-strong);
  border-radius: var(--paper-radius-button);
  background: var(--paper-bg-sunken);
  color: var(--paper-text-secondary);
}

.paper-keycap__plus {
  font-size: var(--paper-size-small-caption);
  color: var(--paper-text-tertiary);
}

/* ---- PaperCheckbox (drawn ink-blue checkbox + leading label) ---- */
.paper-checkbox {
  display: inline-flex;
  align-items: center;
  gap: var(--paper-space-xs);
  min-height: 44px; /* >=44px hit target */
  cursor: pointer;
  color: var(--paper-text-primary);
  font-size: var(--paper-size-metadata);
}

.paper-checkbox[data-disabled] {
  cursor: default;
  opacity: 0.5;
}

/* Visually hidden, but keeps native semantics + keyboard focus. */
.paper-checkbox__input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  opacity: 0;
  pointer-events: none;
}

.paper-checkbox__box {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 15px;
  height: 15px;
  border: var(--paper-line-control) solid var(--paper-border-control);
  border-radius: var(--paper-radius-button);
  background: var(--paper-bg-raised);
  color: transparent; /* check glyph hidden until checked */
  transition: background var(--paper-motion-fast) var(--paper-ease),
    border-color var(--paper-motion-fast) var(--paper-ease);
}

.paper-checkbox__input:checked + .paper-checkbox__box {
  background: var(--paper-ink-blue);
  border-color: var(--paper-ink-blue);
  color: var(--paper-text-on-accent);
}

.paper-checkbox__input:focus-visible + .paper-checkbox__box {
  outline: 2px solid var(--paper-focus-ring);
  outline-offset: 2px;
}

.paper-checkbox__check {
  display: block;
}

/* ---- PaperIconButton (icon-only, >=44px hit target) ---- */
.paper-icon-button {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: none;
  border-radius: var(--paper-radius-button);
  background: transparent;
  color: var(--paper-text-tertiary);
  cursor: pointer;
  transition: color var(--paper-motion-fast) var(--paper-ease),
    background var(--paper-motion-fast) var(--paper-ease);
}

.paper-icon-button:hover:not(:disabled) {
  color: var(--paper-text-primary);
  background: var(--paper-hover-wash);
}

.paper-icon-button--destructive:hover:not(:disabled) {
  color: var(--paper-destructive);
  background: color-mix(in srgb, var(--paper-destructive) 8%, transparent);
}

.paper-icon-button:focus-visible {
  outline: 2px solid var(--paper-focus-ring);
  outline-offset: -2px;
}

.paper-icon-button:disabled {
  opacity: var(--paper-opacity-disabled);
  cursor: default;
}

/* Mac desktop toolbar glyph: 28pt box, 13–14pt icon (PaperIconButton). */
.paper-icon-button--toolbar {
  width: 28px;
  height: 28px;
  color: var(--paper-text-primary);
}

.paper-utility-button {
  display: inline-flex;
  align-items: center;
  gap: var(--paper-space-xs);
  margin: 0;
  padding: var(--paper-space-xs) 0;
  border: 0;
  background: none;
  font: inherit;
  font-size: var(--paper-size-caption);
  color: var(--paper-text-secondary);
  cursor: pointer;
}

.paper-utility-button:hover:not(:disabled) {
  color: var(--paper-text-primary);
}

.paper-utility-button:focus-visible {
  outline: 2px solid var(--paper-focus-ring);
  outline-offset: 2px;
}

.paper-utility-button:disabled {
  color: var(--paper-text-tertiary);
  cursor: default;
}

.paper-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--paper-space-sm);
  padding: var(--paper-space-xl) var(--paper-space-md);
  text-align: center;
}

.paper-empty-state__icon {
  color: var(--paper-text-tertiary);
}

.paper-empty-state__title {
  margin: 0;
  font-family: var(--paper-font-editorial);
  font-size: var(--paper-size-pane-title);
  font-weight: var(--paper-weight-regular);
  letter-spacing: var(--paper-track-pane-title);
  color: var(--paper-text-primary);
}

.paper-empty-state__body {
  margin: 0;
  max-width: 36ch;
  font-size: var(--paper-size-body);
  color: var(--paper-text-secondary);
  line-height: var(--paper-line-height-reading);
}

.paper-empty-state__action {
  margin-top: var(--paper-space-xs);
}

.paper-menu {
  min-width: 196px;
  padding: var(--paper-space-xs) 0;
  background: var(--paper-popup-menu-bg);
  border: var(--paper-line-control) solid var(--paper-border);
  border-radius: var(--paper-radius-button);
  box-shadow: var(--paper-shadow-menu);
}

.paper-menu__caption {
  padding: var(--paper-space-xs) var(--paper-space-xsm) var(--paper-space-xxs);
  color: var(--paper-text-secondary);
}

.paper-menu__divider {
  height: var(--paper-line-row);
  margin: var(--paper-space-xxs) var(--paper-space-sm);
  background: var(--paper-divider-content);
}

.paper-menu__item {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--paper-space-xs);
  width: 100%;
  min-height: 30px;
  padding: 0 var(--paper-space-sm);
  border: 0;
  background: transparent;
  color: var(--paper-text-primary);
  font: inherit;
  font-size: var(--paper-size-small-body);
  font-weight: var(--paper-weight-regular);
  text-align: left;
  cursor: pointer;
}

.paper-menu__item:hover:not(:disabled):not([data-selected]),
.paper-menu__item:focus-visible:not([data-selected]) {
  background: var(--paper-hover-wash);
}

.paper-menu__item:focus-visible {
  outline: 2px solid var(--paper-focus-ring);
  outline-offset: -2px;
}

.paper-menu__item[data-selected] {
  font-weight: var(--paper-weight-semibold);
}

.paper-menu__item[data-selected]::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--paper-ink-blue);
}

.paper-menu__item--destructive {
  color: var(--paper-destructive);
}

.paper-menu__item--destructive:hover:not(:disabled):not([data-selected]),
.paper-menu__item--destructive:focus-visible:not([data-selected]) {
  background: color-mix(in srgb, var(--paper-destructive) 8%, transparent);
}

/* Touch screens get the 44px row (iOS/Android parity). */
:root[data-mobile-host="true"] .paper-menu__item {
  min-height: 44px;
}

@media (pointer: coarse) {
  .paper-menu__item {
    min-height: 44px;
  }
}

.paper-menu__item-key {
  flex: none;
  width: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.paper-menu__item-lead {
  flex: none;
  width: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.paper-menu__item-label {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.paper-menu__item-trailing {
  flex: none;
  display: inline-flex;
  align-items: center;
}

.paper-task-checkbox {
  position: relative;
  flex: none;
  box-sizing: border-box;
  width: 18px;
  height: 18px;
  padding: 0;
  border: 1.5px solid var(--paper-text-primary);
  border-radius: 0;
  background: transparent;
  cursor: pointer;
}

.paper-task-checkbox:disabled {
  opacity: var(--paper-opacity-disabled);
  cursor: default;
}

/* 18px mark, 26px hit target (WCAG 2.5.8 asks for 24px); 44px on touch. */
.paper-task-checkbox::before {
  content: "";
  position: absolute;
  inset: -5px;
}

:root[data-mobile-host="true"] .paper-task-checkbox::before {
  inset: -13px;
}

/* Completed (PaperTaskCheckbox): success-green rule and check over a 15% wash,
   in the accessible status-ok ink. */
.paper-task-checkbox[data-checked] {
  border-color: var(--paper-status-ok);
  background: color-mix(in srgb, var(--paper-status-ok) 15%, transparent);
}

.paper-task-checkbox[data-checked]::after {
  content: "";
  display: block;
  width: 10px;
  height: 5px;
  margin: 3px auto 0;
  border-left: 1.5px solid var(--paper-status-ok);
  border-bottom: 1.5px solid var(--paper-status-ok);
  transform: rotate(-45deg);
}

.paper-task-checkbox:focus-visible {
  outline: 2px solid var(--paper-focus-ring);
  outline-offset: 2px;
}

.paper-labeled-action {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 36px;
  padding: 0 var(--paper-space-xsm);
  border: var(--paper-line-control) solid transparent;
  border-radius: 0;
  background: transparent;
  color: var(--paper-text-secondary);
  font: inherit;
  font-size: var(--paper-size-metadata);
  font-weight: var(--paper-weight-semibold);
  cursor: pointer;
}

.paper-labeled-action:hover:not(:disabled) {
  color: var(--paper-text-primary);
  background: var(--paper-hover-wash);
  border-color: var(--paper-border);
}

.paper-labeled-action[data-expanded] {
  color: var(--paper-ink-blue);
  background: color-mix(in srgb, var(--paper-ink-blue) 12%, transparent);
  border-color: color-mix(in srgb, var(--paper-ink-blue) 24%, transparent);
}

.paper-labeled-action[data-expanded] .paper-labeled-action__chevron {
  transform: rotate(180deg);
}

.paper-labeled-action:focus-visible {
  outline: 2px solid var(--paper-focus-ring);
  outline-offset: 1px;
}

.paper-labeled-action__title {
  line-height: 1;
  min-width: 52px;
  text-align: left;
}

/* ---- PaperSpinner (single inline loading affordance) ---- */
.paper-spinner {
  display: inline-block;
  border: 2px solid var(--paper-border);
  border-top-color: var(--paper-ink-blue);
  border-radius: 50%;
  animation: paper-spin 0.6s linear infinite;
  flex: none;
  vertical-align: middle;
}

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

@media (prefers-reduced-motion: reduce) {
  .paper-spinner {
    animation: none;
  }
}

/* =====================================================================
 * Primitives ported from the SwiftUI DesignSystem (PaperListRow, PaperPane,
 * PaperDivider, AIGeneratedAttribution, QuietPolish, ProfileAvatarView,
 * PaperContextLens). Values follow the Swift files.
 * ===================================================================== */

/* PaperListRow as a button and at touch density */
button.paper-list-row {
  width: 100%;
  margin: 0;
  border-top: 0;
  border-right: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}
.paper-list-row:focus-visible { outline: 2px solid var(--paper-focus-ring); outline-offset: -2px; }
.paper-list-row--touch { padding-block: var(--paper-space-xsm); }
.paper-list-row[data-disabled] { opacity: var(--paper-opacity-disabled); cursor: default; }

/* PaneDivider: draggable pane rule; ink blue under the pointer or keyboard focus */
.pane-divider--draggable {
  cursor: col-resize;
  touch-action: none;
  transition: background var(--paper-motion-fast) var(--paper-ease);
}

.pane-divider--draggable:hover,
.pane-divider--draggable:focus-visible {
  background: var(--paper-ink-blue);
  outline: none;
}

/* Bounded card for standalone gates and notices (radius-control, no shadow) */
.paper-card {
  display: flex;
  flex-direction: column;
  gap: var(--paper-space-sm);
  width: 100%;
  padding: var(--paper-space-md);
  border: var(--paper-line-control) solid var(--paper-border);
  border-radius: var(--paper-radius-control);
  background: var(--paper-bg-raised);
}

/* PaperDivider */
.paper-divider { flex: none; }
.paper-divider--pane { align-self: stretch; width: var(--paper-line-pane); background: var(--paper-divider-pane); }
.paper-divider--section { height: var(--paper-line-section); background: var(--paper-divider-section); }
.paper-divider--list { height: var(--paper-line-row); background: var(--paper-divider-list); }
.paper-divider--content {
  height: var(--paper-line-content);
  background: repeating-linear-gradient(to right, var(--paper-divider-content) 0 6px, transparent 6px 10px);
}

/* AIContentMark + AIGeneratedAttribution */
.paper-ai-mark { flex: none; color: var(--paper-ai); }
.paper-ai-attribution { display: flex; align-items: flex-start; gap: var(--paper-space-xs); }
.paper-ai-attribution__actions { display: flex; align-items: center; gap: var(--paper-space-xs); margin-left: auto; }
.paper-ai-attribution__mark { margin-top: 1px; }
.paper-ai-attribution__text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.paper-ai-attribution__stamp { color: var(--paper-text-secondary); }
.paper-ai-attribution__details {
  display: flex;
  flex-direction: column;
  gap: 1px;
  font-family: var(--paper-font-mono);
  font-size: var(--paper-size-caption);
  font-weight: var(--paper-weight-medium);
  font-variant-numeric: tabular-nums;
  color: var(--paper-text-tertiary);
}

/* Quiet polish */
.paper-impression { flex: none; color: var(--paper-text-secondary); transform: translateY(-0.5px); }
.paper-impression--suggestion { color: var(--paper-ai); }

.paper-proof { flex: none; }
.paper-proof--unsaved,
.paper-proof--saving { color: var(--paper-ink-annotation); }
.paper-proof--saved { color: var(--paper-ink-secondary); }
.paper-proof--attention { color: var(--paper-error-rust); }

.paper-ledger {
  display: inline-flex;
  align-items: baseline;
  gap: var(--paper-space-xxs);
  font-family: var(--paper-font-mono);
  color: var(--paper-ink-secondary);
}
.paper-ledger__tick { align-self: center; width: var(--paper-line-row); height: 12px; background: var(--paper-text-ghost); }
.paper-ledger__value { font-size: var(--paper-size-caption); font-weight: var(--paper-weight-semibold); font-variant-numeric: tabular-nums; }
.paper-ledger__label { font-size: var(--paper-size-mini); font-weight: var(--paper-weight-medium); letter-spacing: var(--paper-track-stamp); text-transform: uppercase; }

.paper-decision-cursor { display: inline-flex; align-items: center; gap: 2px; color: var(--paper-text-ghost); }
.paper-decision-cursor[data-active] { color: var(--paper-ink-blue); }
.paper-decision-cursor__bar { width: 1px; height: 16px; background: currentColor; }
.paper-decision-cursor[data-active] .paper-decision-cursor__bar { width: 2px; }

.paper-return-notch {
  flex: none;
  color: var(--paper-ink-blue);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--paper-motion-ink) ease-in-out;
}
.paper-return-notch[data-visible] { opacity: 0.7; }

.paper-pressure-rule {
  height: 1px;
  background: var(--paper-text-ghost);
  opacity: 0.52;
  transition: opacity var(--paper-motion-fast) ease-in-out, background var(--paper-motion-fast) ease-in-out;
}
.paper-pressure-rule[data-engaged] { background: var(--paper-ink-annotation); opacity: 0.72; }

.paper-intent-zone { display: flex; justify-content: flex-end; align-items: center; }
.paper-intent-zone__content {
  display: flex;
  align-items: center;
  gap: var(--paper-space-xxs);
  opacity: 0;
  transform: translateX(2px);
  pointer-events: none;
  transition: opacity var(--paper-motion-fast) ease-in-out, transform var(--paper-motion-fast) ease-in-out;
}
.paper-intent-zone[data-revealed] .paper-intent-zone__content,
.paper-intent-zone:focus-within .paper-intent-zone__content {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
@media (hover: none) {
  .paper-intent-zone__content { opacity: 1; transform: none; pointer-events: auto; }
}

.paper-edition-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  column-gap: var(--paper-space-xs);
  row-gap: var(--paper-space-xxs);
  font-family: var(--paper-font-mono);
  color: var(--paper-ink-annotation);
}
.paper-edition-line__mark { display: inline-flex; align-items: center; gap: var(--paper-space-xs); }
.paper-edition-line__label { font-size: var(--paper-size-mini); font-weight: var(--paper-weight-semibold); letter-spacing: var(--paper-track-stamp); text-transform: uppercase; }
.paper-edition-line__rule { width: 36px; height: var(--paper-line-row); background: var(--paper-text-ghost); }
.paper-edition-line__date { font-size: var(--paper-size-caption); font-weight: var(--paper-weight-medium); white-space: nowrap; }

.paper-marginalia {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--paper-space-xs);
  margin: 0 0 0 var(--paper-space-xs);
}
.paper-marginalia::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 calc(-1 * var(--paper-space-xs));
  width: var(--paper-line-row);
  background: var(--paper-text-ghost);
}
.paper-marginalia--horizontal { flex-direction: row; flex-wrap: wrap; align-items: baseline; gap: var(--paper-space-xs) var(--paper-space-sm); }
.paper-marginalia__item { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.paper-marginalia__label {
  font-family: var(--paper-font-mono);
  font-size: var(--paper-size-mini);
  font-weight: var(--paper-weight-semibold);
  letter-spacing: var(--paper-track-stamp);
  text-transform: uppercase;
  color: var(--paper-ink-annotation);
}
.paper-marginalia__value {
  margin: 0;
  font-family: var(--paper-font-mono);
  font-size: var(--paper-size-caption);
  font-weight: var(--paper-weight-medium);
  color: var(--paper-ink-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.paper-composed-empty { display: flex; align-items: flex-start; gap: var(--paper-space-sm); max-width: 420px; }
.paper-composed-empty__mark { flex: none; margin-top: 3px; color: var(--paper-text-ghost); }
.paper-composed-empty__text { display: flex; flex-direction: column; align-items: flex-start; gap: var(--paper-space-xs); min-width: 0; }
.paper-composed-empty__title {
  margin: 0;
  font-family: var(--paper-font-editorial);
  font-size: var(--paper-size-body-large);
  font-weight: var(--paper-weight-medium);
  color: var(--paper-ink-primary);
}
.paper-composed-empty__message { margin: 0; font-size: var(--paper-size-small-body); color: var(--paper-ink-secondary); }

/* Motion utilities: inkPressArrival() and paperModalChoreography() */
.paper-ink-press-arrival { transform-origin: bottom; animation: paper-ink-press var(--paper-motion-ink) ease-out both; }
@keyframes paper-ink-press { from { transform: scaleY(0.986); opacity: 0.9; } }
.paper-modal-choreography { animation: paper-modal-arrive 180ms ease-out both; }
@keyframes paper-modal-arrive { from { opacity: 0.94; transform: translateY(5px) scale(0.992); } }
@media (prefers-reduced-motion: reduce) {
  .paper-ink-press-arrival,
  .paper-modal-choreography { animation: none; }
}

/* ProfileAvatarView: round, like status dots; nothing else is */
.paper-avatar {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-radius: 50%;
  background: linear-gradient(
    to bottom right,
    color-mix(in srgb, var(--paper-text-primary) 30%, transparent),
    color-mix(in srgb, var(--paper-text-primary) 15%, transparent)
  );
}
.paper-avatar img { width: 100%; height: 100%; object-fit: cover; }
.paper-avatar__initials { font-weight: var(--paper-weight-semibold); color: var(--paper-text-primary); line-height: 1; }

/* PaperContextLens: sharp popout surface, 8px × 16px inset, one provenance thread */
.paper-context-lens {
  width: 360px;
  max-width: 100%;
  padding: var(--paper-space-sm) var(--paper-space-xs);
  background: var(--paper-popup-menu-bg);
  border: var(--paper-line-control) solid var(--paper-border);
  border-radius: var(--paper-radius-button);
  box-shadow: var(--paper-shadow-menu);
}
.paper-context-lens__body { display: flex; align-items: stretch; gap: var(--paper-space-xs); }
.paper-context-lens__thread { position: relative; flex: none; width: 14px; }
.paper-context-lens__ring {
  position: absolute;
  top: 3.5px;
  left: 3.5px;
  width: 7px;
  height: 7px;
  border: 1.2px solid var(--paper-ink-annotation);
  border-radius: 50%;
}
.paper-context-lens__line {
  position: absolute;
  top: 11px;
  bottom: 12px;
  left: 6.5px;
  width: 1px;
  background: var(--paper-ink-annotation);
  opacity: 0.58;
}
.paper-context-lens__diamond {
  position: absolute;
  bottom: 4.17px;
  left: 4.17px;
  width: 5.66px;
  height: 5.66px;
  background: var(--paper-ink-annotation);
  opacity: 0.86;
  transform: rotate(45deg);
}
.paper-context-lens__thread:not([data-project]) .paper-context-lens__ring { top: calc(50% - 3.5px); }
.paper-context-lens__thread:not([data-source]) .paper-context-lens__diamond { bottom: calc(50% - 2.83px); }
.paper-context-lens__sections { flex: 1; min-width: 0; }
.paper-context-lens__section { display: flex; flex-direction: column; gap: var(--paper-space-xxs); }
.paper-context-lens__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--paper-space-xs);
  color: var(--paper-text-tertiary);
}
.paper-context-lens__meta {
  font-family: var(--paper-font-mono);
  font-size: var(--paper-size-mini);
  font-weight: var(--paper-weight-medium);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.paper-context-lens__meta--status { font-weight: var(--paper-weight-semibold); }
.paper-context-lens__title-row { display: flex; align-items: baseline; gap: var(--paper-space-xs); }
.paper-context-lens__title-row .paper-impression { align-self: center; }
.paper-context-lens__project-icon { flex: none; display: inline-flex; justify-content: center; width: 15px; color: var(--paper-text-secondary); }
.paper-context-lens__title {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
  font-size: var(--paper-size-small-body);
  font-weight: var(--paper-weight-medium);
  letter-spacing: -0.08px;
  color: var(--paper-text-primary);
}
.paper-context-lens__preview,
.paper-context-lens__missing { margin: 0; font-size: var(--paper-size-caption); color: var(--paper-text-secondary); }
.paper-context-lens__preview { display: -webkit-box; -webkit-box-orient: vertical; overflow: hidden; padding-left: 23px; }
.paper-context-lens__preview--source { -webkit-line-clamp: 5; }
.paper-context-lens__preview--project { -webkit-line-clamp: 3; }
.paper-context-lens__metrics {
  margin: 0;
  padding-left: 23px;
  font-family: var(--paper-font-mono);
  font-size: var(--paper-size-small-caption);
  font-weight: var(--paper-weight-medium);
  color: var(--paper-text-tertiary);
}
.paper-context-lens__divider { height: var(--paper-line-row); margin: var(--paper-space-xsm) 0; background: var(--paper-divider-list); }
.paper-context-lens__divider--open { margin-bottom: 0; }
.paper-context-lens__open {
  position: relative;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: var(--paper-space-xxs);
  width: 100%;
  min-height: 30px;
  padding: 0 var(--paper-space-xxs);
  border: 0;
  background: transparent;
  color: var(--paper-ink-blue);
  font: inherit;
  font-size: var(--paper-size-caption);
  font-weight: var(--paper-weight-semibold);
  cursor: pointer;
}
.paper-context-lens__open:hover,
.paper-context-lens__open:focus-visible { background: var(--paper-hover-wash); outline: none; }
.paper-context-lens__open:focus-visible::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: var(--paper-focus-ring);
}