/* Shared web controls use the host page's Diachronica tokens. */
.site-chrome, .site-settings, .collapsible-panel {
  --chrome-ink: var(--ink, var(--text));
  --chrome-muted: var(--muted, var(--text-soft));
  --chrome-paper: var(--paper, var(--bg));
  --chrome-card: var(--card, var(--surface));
  --chrome-line: var(--line, var(--border));
}
[data-web-shell] { width: 100%; }
.site-chrome { display: grid; grid-template-columns: auto minmax(0,1fr) 44px; align-items: center; gap: 16px; }
.site-chrome-brand { color: var(--chrome-ink); text-decoration: none; white-space: nowrap; font: 700 19px/1.25 "Iowan Old Style",Palatino,Georgia,serif; }
.site-chrome-brand span { color: var(--accent); }
.site-chrome-nav { display: flex; justify-content: center; flex-wrap: nowrap; gap: 2px; min-width: 0; padding: 4px; margin: 0; border: 0; border-radius: 0; background: transparent; }
.site-chrome-nav a { display: inline-flex; flex: 0 0 auto; white-space: nowrap; align-items: center; justify-content: center; min-height: 44px; padding: 8px 11px; border-radius: 10px; color: var(--chrome-muted); font: 500 14px/1.2 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif; text-decoration: none; }
.site-chrome-nav a[aria-current] { color: var(--button-ink,#fff); background: var(--accent); font-weight: 700; }
body.dark .site-chrome-nav a[aria-current], body.hc .site-chrome-nav a[aria-current] { color: var(--paper,var(--bg)); }
.site-chrome-nav a:hover { color: var(--chrome-ink); background: var(--surface-2); }
.site-chrome-nav a[aria-current]:hover { background: var(--accent); color: var(--button-ink,#fff); }
body.dark .site-chrome-nav a[aria-current]:hover, body.hc .site-chrome-nav a[aria-current]:hover { color: var(--paper,var(--bg)); }
.site-settings-button, .site-settings-close { display: grid; place-items: center; width: 44px; height: 44px; min-height: 44px; padding: 0; border: 1px solid var(--chrome-line); border-radius: 50%; background: var(--chrome-card); color: var(--chrome-muted); cursor: pointer; }
.site-chrome :focus-visible, .site-settings :focus-visible, .collapsible-panel > summary:focus-visible { outline: 2px solid var(--focus,var(--accent)); outline-offset: 3px; }
.site-settings { width: min(440px,calc(100% - 24px)); max-height: calc(100dvh - 32px); overflow: auto; box-sizing: border-box; padding: 20px; border: 1px solid var(--chrome-line); border-radius: 16px; background: var(--chrome-paper); color: var(--chrome-ink); box-shadow: var(--shadow); font: 14px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif; }
.site-settings::backdrop { background: rgba(0,0,0,.5); }
.site-settings-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.site-settings h2 { margin: 0; color: var(--chrome-ink); text-transform: none; letter-spacing: 0; font: 700 26px/1.25 "Iowan Old Style",Palatino,Georgia,serif; }
.site-settings-close { font: 24px/1 sans-serif; }
.site-settings fieldset { margin: 18px 0; padding: 0; border: 0; min-width: 0; }
.site-settings legend { margin-bottom: 8px; color: var(--chrome-muted); font-weight: 600; }
.site-appearance { display: flex; flex-wrap: wrap; gap: 6px; }
.site-appearance button { flex: 1; min-width: 72px; min-height: 44px; padding: 8px; border: 1px solid var(--chrome-line); border-radius: 10px; background: var(--chrome-card); color: var(--chrome-ink); font: inherit; cursor: pointer; }
.site-appearance button[aria-pressed="true"] { background: var(--surface-2); border: 2px solid var(--accent); font-weight: 700; }
.site-settings-links { display: grid; border-top: 1px solid var(--chrome-line); }
.site-settings-links a, .site-settings-links button { text-align: left; min-height: 44px; padding: 10px 0; border: 0; border-radius: 0; border-bottom: 1px solid var(--chrome-line); background: none; color: var(--chrome-ink); font: inherit; text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }
.web-shell-active > .site-header { position: sticky; top: 0; z-index: 20; padding: 12px 18px; background: var(--paper); border-bottom: 1px solid var(--line); }
.web-shell-active [data-native-header][hidden] { display: none; }
.collapsible-panel > summary { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 44px; margin: -8px 0; padding: 8px 0; cursor: pointer; list-style: none; }
.collapsible-panel > summary::-webkit-details-marker { display: none; }
.collapsible-panel > summary::after { content: '+'; color: var(--chrome-muted); font: 20px/1 sans-serif; flex: 0 0 auto; }
.collapsible-panel[open] > summary::after { content: '−'; }
.collapsible-panel > summary h1, .collapsible-panel > summary h2 { margin: 0; }
.collapsible-panel > .panel-body { margin-top: 14px; }
.collapsible-panel:not([open]) > .panel-body { display: none; }
.collapsible-panel > summary .word { font-size: 34px; }
.usage-notes { margin-top: 12px; font-size: 12px; }
.usage-notes > summary { cursor: pointer; padding: 12px 0; min-height: 44px; font-weight: 600; }
@media (max-width: 1100px) {
  .site-chrome { grid-template-columns: minmax(0,1fr) 44px; gap: 8px; }
  .site-settings-button { grid-column: 2; grid-row: 1; }
  .site-chrome-nav { grid-column: 1 / -1; grid-row: 2; justify-content: flex-start; overflow-x: auto; overscroll-behavior-x: contain; scrollbar-width: thin; scrollbar-color: var(--chrome-muted) transparent; scroll-padding-inline: 4px; }
}
@media (max-width: 480px) {
  .site-chrome-nav a { padding: 8px 10px; font-size: 13px; }
  .web-shell-active > header { position: static; }
  .site-settings { padding: 16px; }
}
@media (prefers-reduced-motion: reduce) { .collapsible-panel { animation: none; } }