/* Shared palette for matched side-panel grounds and the inline settings accordion. */
body[data-theme-tone] {
  --settings-fill: #1b1c19; --settings-ink: #f2e7cf; --settings-muted: #c8c1b5;
  --settings-accent: #c6b17d; --settings-open: #353329; --settings-open-ink: #fff0cc;
}
body[data-visual-style="jacobean"][data-theme-tone="dark"] { --settings-fill: #201816; --settings-accent: #c7ac79; --settings-open: #3a3028; }
body[data-visual-style="jerusalem"][data-theme-tone="dark"] { --settings-fill: #242119; --settings-accent: #c3ae79; --settings-open: #3b3628; }
body[data-theme-tone="light"] {
  --settings-fill: #f0eadf; --settings-ink: #30291f; --settings-muted: #51493b;
  --settings-accent: #6c552f; --settings-open: #e1d5bb; --settings-open-ink: #31291a;
}
body[data-visual-style="jacobean"][data-theme-tone="light"] { --settings-fill: #eee2cd; --settings-open: #d9c8a9; }
body[data-visual-style="jerusalem"][data-theme-tone="light"] { --settings-fill: #f0e7d4; --settings-open: #dfd1ac; }
/* Desktop panels share the wood canvas. Overlay drawers retain their existing
   opaque sheet surfaces so covered reader text cannot show through the controls. */
@media (min-width: 901px) {
  html body:not([data-chrome-mode="theatre"])[data-visual-style][data-theme-tone][data-side-panel-opacity="true"] :is(#library-panel, #utility-panel) {
    background: color-mix(in srgb, var(--settings-fill) 75%, transparent) !important;
  }
}
html body[data-visual-style][data-theme-tone] #utility-panel #display-view > .display-settings-section {
  display: block !important; height: auto !important; max-height: none !important;
  overflow: visible !important; padding: 0 !important; margin: 0 !important;
  border: 0 !important; background: transparent !important;
}
html body[data-visual-style][data-theme-tone] #utility-panel #display-view > .display-settings-section + .display-settings-section {
  border-top: 1px solid color-mix(in srgb, var(--ink) 15%, transparent) !important;
}
/* One enclosing outline connects each expanded heading with its controls. */
html body[data-visual-style][data-theme-tone] #utility-panel #display-view > .display-settings-section.is-open {
  border: 1px solid var(--settings-accent) !important;
  border-radius: 10px;
  background: var(--settings-open) !important;
}
html body[data-visual-style][data-theme-tone] #utility-panel #display-view .display-section-heading {
  display: block !important; padding: 0 !important; margin: 0 !important;
  background: transparent !important; border-radius: 6px;
}
html body[data-visual-style][data-theme-tone] #utility-panel #display-view .is-open > .display-section-heading {
  position: sticky; top: 0; z-index: 5;
  background: var(--settings-open) !important;
  border-radius: 9px 9px 0 0;
}
html body[data-visual-style][data-theme-tone] #utility-panel #display-view .display-section-heading h3 { margin: 0 !important; }
html body[data-visual-style][data-theme-tone] #utility-panel #display-view .display-accordion-toggle {
  display: grid !important; grid-template-columns: 24px minmax(0, 1fr) 76px; gap: 8px;
  align-items: center; width: 100%; min-height: 72px; padding: 11px 5px !important;
  border: 0 !important;
  border-radius: 6px; background: transparent !important;
  box-shadow: none !important; color: var(--settings-ink) !important; text-align: left;
  font-family: system-ui, sans-serif; text-transform: none !important; letter-spacing: normal !important; text-shadow: none !important;
  transition: none !important; filter: none !important;
}
html body[data-visual-style][data-theme-tone] #utility-panel #display-view .is-open .display-accordion-toggle {
  background: var(--settings-open) !important; color: var(--settings-open-ink) !important;
  border-radius: 9px 9px 0 0; box-shadow: none !important;
}
html body[data-visual-style][data-theme-tone] #utility-panel #display-view .display-accordion-toggle:hover { border-color: var(--settings-accent) !important; }
html body[data-visual-style][data-theme-tone] #utility-panel #display-view .display-accordion-toggle:focus-visible,
html body[data-visual-style][data-theme-tone] #source-open.edition-about-link:focus-visible {
  outline: 2px solid var(--settings-accent) !important; outline-offset: 2px;
}
html body[data-visual-style][data-theme-tone] #utility-panel #display-view .display-section-number {
  width: 23px; height: 23px; color: var(--settings-ink); background: transparent;
  border: 1px solid var(--settings-accent); box-shadow: none; font: 700 11px/1 system-ui, sans-serif;
}
.display-accordion-copy { display: grid; gap: 5px; min-width: 0; }
html body[data-visual-style][data-theme-tone] #utility-panel #display-view .display-accordion-title {
  font: 700 13px/1.35 system-ui, sans-serif; text-transform: none; letter-spacing: normal;
}
html body[data-visual-style][data-theme-tone] #utility-panel #display-view .display-accordion-summary {
  display: block; color: var(--settings-muted); font: 400 11px/1.4 system-ui, sans-serif;
  text-transform: none; letter-spacing: normal;
}
html body[data-visual-style][data-theme-tone] #utility-panel #display-view .display-accordion-disclosure {
  display:inline-flex; flex-direction:row-reverse; align-items:center; justify-content:center; gap:5px;
  width:76px; min-height:44px; padding:8px; box-sizing:border-box;
  border:1px solid var(--button-neutral-border,var(--line));
  border-radius:var(--button-radius,5px);
  background:var(--button-neutral-bg,var(--panel-soft)); color:var(--button-neutral-ink,var(--ink));
  box-shadow:var(--button-shadow,none);
}
html body[data-visual-style][data-theme-tone] #utility-panel #display-view .display-accordion-disclosure svg { width: 14px; height: 14px; flex: none; fill: none; stroke: currentColor; stroke-width: 2; }
html body[data-visual-style][data-theme-tone] #utility-panel #display-view .display-accordion-disclosure small { color: inherit !important; font: 600 12px/1.25 var(--button-ui-font,Arial,sans-serif); }
html body[data-visual-style][data-theme-tone] #utility-panel #display-view .display-accordion-toggle:hover .display-accordion-disclosure { background: var(--button-neutral-hover-bg,var(--panel)); }
.display-accordion-toggle[aria-expanded="true"] .display-accordion-disclosure svg { transform: rotate(180deg); }
html body[data-visual-style][data-theme-tone] #utility-panel #display-view .display-accordion-content {
  display: grid; grid-template-columns: minmax(0, 1fr); gap: 14px; padding: 14px 5px 18px;
  height: auto !important; max-height: none !important; overflow: visible !important;
  border: 0;
  border-top: 1px solid color-mix(in srgb, var(--settings-accent) 35%, transparent);
  border-radius: 0 0 9px 9px;
}
html body[data-visual-style][data-theme-tone] #utility-panel #display-view .display-accordion-content[hidden] { display: none !important; }
html body[data-visual-style][data-theme-tone] #utility-panel #display-view .display-accordion-content > .setting-group {
  min-width: 0; margin: 0; padding: 0 !important; border: 0 !important;
}
.edition-heading-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
html body[data-visual-style][data-theme-tone] #utility-panel #display-view .edition-heading-row h3 { margin: 0 !important; }
html body[data-visual-style][data-theme-tone] #utility-panel #display-view #source-open.edition-about-link {
  display: inline-flex; align-items: center; justify-content: center; flex: none;
  min-width: 44px; min-height: 32px; padding: 4px 2px !important; border: 0 !important;
  border-radius: 2px; background: transparent !important; box-shadow: none !important;
  color: var(--ink) !important; font: 12px/1.4 system-ui, sans-serif !important;
  text-transform: none !important; letter-spacing: normal !important;
  text-decoration: underline; text-underline-offset: 3px;
}
html body[data-visual-style][data-theme-tone] #utility-panel #display-view #source-open.edition-about-link:hover { text-decoration-thickness: 2px; }
.display-reference-purpose { margin: 0 0 12px; color: var(--ink); font-size: 12px; line-height: 1.5; }
/* The existing utility-content is the only scrolling area. */
#utility-panel > .utility-content { overscroll-behavior-y: contain; scrollbar-gutter: stable; }