/* Private Local Chat public pages (Help, About, Privacy, Updates). One stylesheet, brand tokens from /brand/design-tokens.css,
   system fonts only, no external resources. Light and dark follow the browser (and data-theme when one is set). */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
[hidden] { display: none !important; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body {
  margin: 0;
  font-family: var(--plc-font);
  font-size: 1rem;
  line-height: 1.6;
  background: var(--plc-background);
  color: var(--plc-ink);
  -webkit-font-smoothing: antialiased;
  overflow-wrap: anywhere;
}
:focus-visible { outline: 3px solid var(--plc-focus); outline-offset: 2px; border-radius: 4px; }
a { color: var(--plc-accent); text-underline-offset: 0.18em; }
a:hover { color: var(--plc-accent-hover); }
::selection { background: color-mix(in srgb, var(--plc-accent) 28%, transparent); }
img { max-width: 100%; height: auto; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 var(--plc-space-3); overflow-wrap: break-word; }
h1 { font-size: clamp(1.75rem, 4vw + 1rem, 2.5rem); letter-spacing: -0.01em; }
h2 { font-size: 1.5rem; margin-top: var(--plc-space-12); }
h3 { font-size: 1.15rem; margin-top: var(--plc-space-6); }
p, ul, ol, dl, table, details { margin: 0 0 var(--plc-space-4); }
ul, ol { padding-left: 1.4rem; }
li + li { margin-top: var(--plc-space-1); }
code, kbd { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.92em; background: var(--plc-accent-tint); padding: 0.1em 0.35em; border-radius: 0.35em; overflow-wrap: anywhere; }
.muted { color: var(--plc-muted); }
:target { scroll-margin-top: var(--plc-space-4); }
section[id], article[id], details[id] { scroll-margin-top: var(--plc-space-4); }
:target > summary, article:target, section:target > h2 { outline: 2px solid var(--plc-accent); outline-offset: 4px; border-radius: var(--plc-radius-control); }

.skip-link { position: absolute; left: var(--plc-space-4); top: -4rem; z-index: 10; background: var(--plc-accent); color: var(--plc-on-accent); padding: var(--plc-space-3) var(--plc-space-4); border-radius: var(--plc-radius-control); font-weight: 600; min-height: var(--plc-control-min); display: inline-flex; align-items: center; }
.skip-link:focus { top: var(--plc-space-3); color: var(--plc-on-accent); }

/* ---- header and footer ------------------------------------------------------------------------------------------- */
.site-header { background: var(--plc-surface); border-bottom: 1px solid var(--plc-border); }
.site-header-inner, .site-footer-inner, main { width: 100%; max-width: 62rem; margin-inline: auto; padding-inline: max(var(--plc-space-4), env(safe-area-inset-left)) max(var(--plc-space-4), env(safe-area-inset-right)); }
.site-header-inner { display: flex; flex-wrap: wrap; align-items: center; gap: var(--plc-space-2) var(--plc-space-6); padding-block: var(--plc-space-3); }
.brand { display: inline-flex; align-items: center; min-height: var(--plc-control-min); }
.brand img { display: block; height: 1.9rem; width: auto; min-width: 9.75rem; }
.site-nav { flex: 1 1 auto; min-width: 0; }
.site-nav-list, .footer-nav-list { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: var(--plc-space-1) var(--plc-space-2); }
.site-nav-list li, .footer-nav-list li { margin: 0; }
.site-nav-list a, .footer-nav-list a { display: inline-flex; align-items: center; min-height: var(--plc-control-min); padding: 0 var(--plc-space-3); border-radius: var(--plc-radius-control); color: var(--plc-ink); text-decoration: none; font-weight: 500; }
.site-nav-list a:hover, .footer-nav-list a:hover { background: var(--plc-accent-tint); color: var(--plc-ink); }
.site-nav-list a[aria-current="page"], .footer-nav-list a[aria-current="page"] { background: var(--plc-accent-tint); font-weight: 700; box-shadow: inset 0 -3px 0 var(--plc-accent); }
.header-open { margin-left: auto; }

.site-footer { margin-top: var(--plc-space-16); border-top: 1px solid var(--plc-border); background: var(--plc-surface); padding-block: var(--plc-space-6); }
.site-footer-inner { display: grid; gap: var(--plc-space-3); }
.site-footer p { margin: 0; color: var(--plc-muted); font-size: 0.92rem; }

/* ---- buttons ---------------------------------------------------------------------------------------------------- */
.button, button.primary, button.secondary {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--plc-space-2);
  min-height: var(--plc-control-min); min-width: var(--plc-control-min); padding: var(--plc-space-2) var(--plc-space-4);
  border-radius: var(--plc-radius-control); border: 1px solid var(--plc-border);
  font: inherit; font-size: 0.97rem; font-weight: 600; line-height: 1.25; text-align: center; text-decoration: none; cursor: pointer;
  background: var(--plc-surface); color: var(--plc-ink);
  transition: background var(--plc-motion-fast) var(--plc-ease), border-color var(--plc-motion-fast) var(--plc-ease);
}
.button:hover, button.secondary:hover { background: var(--plc-accent-tint); border-color: var(--plc-accent); color: var(--plc-ink); }
.button.primary, button.primary { background: var(--plc-accent); border-color: var(--plc-accent); color: var(--plc-on-accent); }
.button.primary:hover, button.primary:hover { background: var(--plc-accent-hover); border-color: var(--plc-accent-hover); color: var(--plc-on-accent); }
[aria-busy="true"] { opacity: 0.6; cursor: progress; }

/* ---- page layout ------------------------------------------------------------------------------------------------ */
main { padding-block: var(--plc-space-8) 0; display: block; }
.page-intro { max-width: 44rem; }
.lede { font-size: 1.15rem; color: var(--plc-ink); }
.page-meta { color: var(--plc-muted); font-size: 0.92rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--plc-space-3); margin-block: var(--plc-space-4); }
.prose { max-width: 44rem; }
.prose-wide { max-width: 100%; }

.toc { background: var(--plc-surface); border: 1px solid var(--plc-border); border-radius: var(--plc-radius-panel); padding: var(--plc-space-4) var(--plc-space-6); margin-block: var(--plc-space-6); max-width: 44rem; }
.toc h2 { font-size: 1rem; margin: 0 0 var(--plc-space-2); }
.toc ul { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: var(--plc-space-1) var(--plc-space-2); }
.toc a { display: inline-flex; align-items: center; min-height: var(--plc-control-min); padding: 0 var(--plc-space-3); border-radius: var(--plc-radius-control); text-decoration: none; background: var(--plc-accent-tint); color: var(--plc-ink); font-weight: 500; }
.toc a:hover { outline: 1px solid var(--plc-accent); }

.steps { padding-left: 1.6rem; }
.steps li { padding-left: var(--plc-space-1); }
.steps li + li { margin-top: var(--plc-space-3); }

.card, .callout, .contact-card, .issue, .update, .share-section { background: var(--plc-surface); border: 1px solid var(--plc-border); border-radius: var(--plc-radius-panel); padding: var(--plc-space-4) var(--plc-space-6); margin-block: var(--plc-space-4); max-width: 44rem; }
.card > :last-child, .callout > :last-child, .contact-card > :last-child, .issue > :last-child, .update > :last-child { margin-bottom: 0; }
.card h3, .contact-card h3, .issue h3, .update h3 { margin-top: 0; }
.callout { background: var(--plc-accent-tint); }
.callout.notice { background: var(--plc-warning-tint); border-color: var(--plc-warning); }
.callout-title { font-weight: 700; margin-bottom: var(--plc-space-2); }
.public-note { background: var(--plc-danger-tint); border: 1px solid var(--plc-danger); border-radius: var(--plc-radius-panel); padding: var(--plc-space-3) var(--plc-space-4); max-width: 44rem; }
.public-note strong { color: var(--plc-danger); }

/* FAQ: native details. Open by default; the answer is always in the HTML. */
.faq-item { background: var(--plc-surface); border: 1px solid var(--plc-border); border-radius: var(--plc-radius-panel); max-width: 44rem; margin-bottom: var(--plc-space-3); }
.faq-item > summary { display: flex; align-items: center; gap: var(--plc-space-3); min-height: var(--plc-control-min); padding: var(--plc-space-3) var(--plc-space-4); cursor: pointer; font-weight: 650; list-style: none; border-radius: var(--plc-radius-panel); }
.faq-item > summary::-webkit-details-marker { display: none; }
.faq-item > summary::after { content: "\203A"; margin-left: auto; font-size: 1.4rem; line-height: 1; color: var(--plc-muted); transition: transform var(--plc-motion-fast) var(--plc-ease); }
.faq-item[open] > summary::after { transform: rotate(90deg); }
.faq-item > summary:hover { background: var(--plc-accent-tint); }
.faq-item > .faq-body { padding: 0 var(--plc-space-4) var(--plc-space-4); }
.faq-item .faq-body > :last-child { margin-bottom: 0; }
.faq-more { color: var(--plc-muted); font-size: 0.95rem; }

/* known issues and updates */
.issue-facts { display: grid; grid-template-columns: minmax(7.5rem, max-content) 1fr; gap: var(--plc-space-2) var(--plc-space-4); margin: 0 0 var(--plc-space-3); }
.issue-facts dt { font-weight: 650; color: var(--plc-muted); }
.issue-facts dd { margin: 0; }
@media (max-width: 34rem) { .issue-facts { grid-template-columns: 1fr; gap: 0; } .issue-facts dt { margin-top: var(--plc-space-3); } }
.badge { display: inline-block; padding: 0.1rem 0.6rem; border-radius: 999px; background: var(--plc-warning-tint); color: var(--plc-warning); border: 1px solid var(--plc-warning); font-size: 0.88rem; font-weight: 650; }
.issue-summary { list-style: none; padding: 0; }
.issue-summary li { padding: var(--plc-space-2) 0; border-bottom: 1px solid var(--plc-border); }
.update-meta, .update-links { color: var(--plc-muted); font-size: 0.95rem; }
.update h3 a { color: inherit; text-decoration: none; }
.update h3 a:hover { text-decoration: underline; }
.feed-link { display: inline-flex; align-items: center; min-height: var(--plc-control-min); font-weight: 600; }

/* tables (privacy) scroll sideways instead of squeezing */
.table-wrap { overflow-x: auto; border: 1px solid var(--plc-border); border-radius: var(--plc-radius-control); background: var(--plc-surface); margin-bottom: var(--plc-space-4); -webkit-overflow-scrolling: touch; }
.table-wrap table { margin: 0; border-collapse: collapse; width: 100%; min-width: 34rem; font-size: 0.95rem; }
.table-wrap th, .table-wrap td { text-align: left; vertical-align: top; padding: var(--plc-space-3) var(--plc-space-4); border-bottom: 1px solid var(--plc-border); }
.table-wrap thead th { background: var(--plc-accent-tint); }
.table-wrap tr:last-child td, .table-wrap tr:last-child th { border-bottom: 0; }
.table-wrap:focus-visible { outline-offset: 0; }

/* share and resources */
.share-section { padding-block: var(--plc-space-6); }
.share-section h2 { margin-top: 0; }
.product-share { display: grid; gap: var(--plc-space-3); }
.product-share-copy { margin: 0; }
.product-share-actions { display: flex; flex-wrap: wrap; gap: var(--plc-space-2); }
.product-share-status { margin: 0; min-height: 1.5em; font-weight: 600; color: var(--plc-success); }
.product-share-manual { display: grid; gap: var(--plc-space-1); }
.product-share-manual[hidden], .product-share-qr[hidden] { display: none; }
.product-share-address { width: 100%; min-height: var(--plc-control-min); padding: var(--plc-space-2) var(--plc-space-3); border: 1px solid var(--plc-border); border-radius: var(--plc-radius-control); background: var(--plc-background); color: var(--plc-ink); font: inherit; font-size: 1rem; }
.product-share-qr { display: grid; justify-items: start; gap: var(--plc-space-2); }
.product-share-qr-image { display: inline-block; padding: var(--plc-space-3); background: #fff; border: 1px solid var(--plc-border); border-radius: var(--plc-radius-control); line-height: 0; }
.product-share-qr-image img, .product-share-qr-image canvas { display: block; max-width: 100%; height: auto; }
.product-share-destination { margin: 0; font-weight: 600; }

.resource-grid { display: grid; gap: var(--plc-space-4); grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr)); max-width: 62rem; margin-block: var(--plc-space-4); }
.resource { background: var(--plc-surface); border: 1px solid var(--plc-border); border-radius: var(--plc-radius-panel); padding: var(--plc-space-4); margin: 0; display: grid; gap: var(--plc-space-2); align-content: start; }
.resource h3 { margin: 0; font-size: 1rem; }
.resource p { margin: 0; }
.resource .copy-field { width: 100%; min-height: var(--plc-control-min); padding: var(--plc-space-2) var(--plc-space-3); border: 1px solid var(--plc-border); border-radius: var(--plc-radius-control); background: var(--plc-background); color: var(--plc-ink); font: inherit; }
.resource .preview { background: var(--plc-background); border: 1px solid var(--plc-border); border-radius: var(--plc-radius-control); padding: var(--plc-space-3); }
.resource .preview.on-dark { background: #101820; }
.resource img { display: block; border-radius: var(--plc-radius-control); }
.screenshot-figure { margin: 0; max-width: 62rem; }
.screenshot-figure img { border: 1px solid var(--plc-border); border-radius: var(--plc-radius-panel); }
.screenshot-figure figcaption { color: var(--plc-muted); font-size: 0.92rem; margin-top: var(--plc-space-2); }
.example-list { padding-left: 1.2rem; max-width: 44rem; }
.example-list li { margin-bottom: var(--plc-space-3); }

.visually-hidden { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

@media (max-width: 40rem) {
  main { padding-block-start: var(--plc-space-6); }
  .card, .callout, .contact-card, .issue, .update, .share-section { padding: var(--plc-space-4); }
  .header-open { margin-left: 0; width: 100%; }
  .header-open .button { width: 100%; }
  h2 { margin-top: var(--plc-space-8); }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }
@media print { .site-header .header-open, .product-share-actions, .skip-link { display: none; } }