/* Groundzero documentation site chrome. Colour tokens live in theme.css (generated from
   site.config.json); fonts in fonts/fonts.css. */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }
body {
  margin: 0; background: #fff; color: var(--text);
  font-family: var(--font-sans); font-size: 16px; line-height: 1.6;
}
a { color: var(--accent); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 3px; }
.skip { position: absolute; left: 8px; top: -60px; z-index: 100; background: var(--accent-dark); color: #fff; padding: 10px 14px; border-radius: 6px; }
.skip:focus { top: 8px; outline-color: #fff; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 40; height: 64px; display: flex; align-items: center; gap: 14px;
  padding: 0 20px; background: #fff; border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--accent-dark); flex: none; min-width: 0; }
.brand img { height: 38px; width: auto; display: block; }
.brand .brand-sub { font: 700 .8rem var(--font-mono); letter-spacing: .04em; color: var(--accent-dark); border-left: 1px solid var(--border); padding-left: 10px; white-space: nowrap; }
.top-nav { display: none; gap: 2px; margin-left: 12px; }
.top-nav a { text-decoration: none; color: var(--text); font-weight: 500; font-size: .9rem; padding: 8px 10px; border-radius: 6px; white-space: nowrap; }
.top-nav a:hover { background: var(--accent-tint); color: var(--accent-dark); }
.top-nav a[aria-current] { color: var(--accent-dark); background: var(--accent-tint); font-weight: 600; }
.header-spacer { flex: 1; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--border); background: #fff;
  color: var(--accent-dark); border-radius: 8px; padding: 8px 12px; font: 600 .88rem var(--font-sans);
  cursor: pointer; text-decoration: none;
}
.btn:hover { background: var(--accent-tint); }
.btn.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn.primary:hover { background: var(--accent-dark); }
.search-btn { min-width: 0; color: var(--muted); font-weight: 500; }
.search-btn kbd { font: 600 .72rem var(--font-mono); border: 1px solid var(--border); border-radius: 4px; padding: 1px 6px; color: var(--muted); background: var(--accent-soft); }
.search-btn .lbl { display: none; }
.menu-btn { padding: 8px 10px; }

/* Layout */
.layout { display: block; max-width: 1480px; margin: 0 auto; }
.sidebar {
  position: fixed; z-index: 50; top: 0; left: 0; bottom: 0; width: min(88vw, 320px); background: #fff;
  border-right: 1px solid var(--border); padding: 16px 14px 40px; overflow-y: auto; scrollbar-width: none;
  transform: translateX(-102%); transition: transform .2s; visibility: hidden;
}
.sidebar::-webkit-scrollbar { display: none; }
body.nav-open .sidebar { transform: none; visibility: visible; box-shadow: 0 0 40px rgba(15,23,42,.25); }
.scrim { position: fixed; inset: 0; background: rgba(15,23,42,.45); z-index: 45; display: none; }
body.nav-open .scrim { display: block; }
.sidebar .close-nav { float: right; }
.side-guide { font: 800 .98rem/1.3 var(--font-mono); color: var(--accent-dark); margin: 6px 0 4px; overflow-wrap: break-word; }
.side-group { display: flex; flex-wrap: wrap; gap: 4px; margin: 8px 0 10px; }
.side-group a { font-size: .8rem; font-weight: 600; text-decoration: none; padding: 4px 10px; border: 1px solid var(--border); border-radius: 999px; color: var(--accent-dark); }
.side-group a[aria-current] { background: var(--accent); color: #fff; border-color: var(--accent); }
.side-pdf { display: block; margin: 8px 0 12px; }
.chapters { list-style: none; margin: 0; padding: 0; counter-reset: none; }
.chapters a {
  display: block; padding: 7px 10px; margin: 1px 0; border-radius: 6px; text-decoration: none;
  color: var(--text); font-size: .9rem; line-height: 1.4; overflow-wrap: break-word;
}
.chapters a:hover { background: var(--accent-tint); }
.chapters a[aria-current="page"] { background: var(--accent-tint); color: var(--accent-dark); font-weight: 700; }
.chapters .num { font-family: var(--font-mono); color: var(--muted); margin-right: .45em; font-size: .82em; }
.side-sub { list-style: none; margin: 0 0 6px 12px; padding: 0 0 0 10px; border-left: 1px solid var(--border); }
.side-sub a { font-size: .82rem; color: var(--muted); padding: 4px 8px; }
.other-guides { margin-top: 18px; border-top: 1px solid var(--border); padding-top: 10px; }
.other-guides summary { cursor: pointer; font: 700 .8rem var(--font-mono); color: var(--accent-dark); text-transform: uppercase; letter-spacing: .05em; padding: 6px 4px; }
.other-guides ul { list-style: none; margin: 6px 0 0; padding: 0; }
.other-guides a { display: block; padding: 6px 10px; border-radius: 6px; text-decoration: none; font-size: .88rem; color: var(--text); }
.other-guides a:hover { background: var(--accent-tint); }
.other-guides .grp { font: 700 .72rem var(--font-mono); text-transform: uppercase; letter-spacing: .05em; color: var(--muted); padding: 8px 10px 2px; }

.content-col { padding: 22px 16px 60px; min-width: 0; }
.crumbs { font-size: .84rem; color: var(--muted); margin-bottom: 14px; }
.crumbs ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 8px; }
.crumbs li + li::before { content: "\203A"; margin-right: 8px; color: var(--muted); }
.crumbs a { color: var(--accent); text-decoration: none; }
.crumbs a:hover { text-decoration: underline; }
.crumbs [aria-current] { color: var(--text); font-weight: 500; }
.page-grid { display: block; }
.article-col { min-width: 0; max-width: 820px; }
.toc-box { margin: 0 0 22px; border: 1px solid var(--border); border-radius: 10px; background: var(--accent-soft); }
.toc-box summary { cursor: pointer; padding: 10px 14px; font: 700 .78rem var(--font-mono); letter-spacing: .06em; text-transform: uppercase; color: var(--accent-dark); }
.toc-box ul { list-style: none; margin: 0; padding: 0 14px 12px; }
.toc-box li a { display: block; padding: 4px 0; color: var(--text); text-decoration: none; font-size: .87rem; line-height: 1.4; overflow-wrap: break-word; }
.toc-box li.l3 a { padding-left: 14px; color: var(--muted); font-size: .82rem; }
.toc-box li a:hover { color: var(--accent); text-decoration: underline; }
.toc-box li a.active { color: var(--accent-dark); font-weight: 700; }
.chapter-meta { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin: 0 0 22px; color: var(--muted); font-size: .86rem; }
.pager { display: grid; gap: 12px; grid-template-columns: 1fr; margin: 48px 0 0; padding-top: 24px; border-top: 1px solid var(--border); }
.pager a {
  display: block; border: 1px solid var(--border); border-radius: 10px; padding: 12px 16px; text-decoration: none;
  color: var(--text); overflow-wrap: break-word;
}
.pager a:hover { border-color: var(--accent); background: var(--accent-soft); }
.pager small { display: block; font: 600 .72rem var(--font-mono); text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.pager .t { font-weight: 600; color: var(--accent-dark); }
.pager .next { text-align: right; }
.site-footer { border-top: 1px solid var(--border); background: var(--accent-soft); padding: 24px 20px; font-size: .86rem; color: var(--muted); }
.site-footer .in { max-width: 1480px; margin: 0 auto; display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; }
.site-footer a { color: var(--accent-dark); }

/* Home + landing pages */
.hero { background: linear-gradient(180deg, var(--accent-soft), #fff); border-bottom: 1px solid var(--border); padding: 56px 20px 48px; text-align: center; }
.hero-logo { display: block; margin: 0 auto 22px; height: 62px; width: auto; max-width: 90%; }
.hero h1 { font: 800 clamp(1.7rem, 5vw, 2.7rem)/1.2 var(--font-mono); color: var(--accent-dark); margin: 0 auto 14px; max-width: 18em; }
.hero p { margin: 0 auto 24px; max-width: 40em; font-size: 1.1rem; color: var(--muted); }
.hero-search { display: flex; max-width: 560px; margin: 0 auto; }
.hero-search button {
  flex: 1; text-align: left; justify-content: flex-start; padding: 14px 18px; font-size: 1rem; color: var(--muted);
  border: 2px solid var(--accent); border-radius: 12px; background: #fff; font-weight: 500; box-shadow: 0 4px 16px rgba(11,92,171,.12);
}
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.section { padding: 40px 0 8px; }
.section h2 { font: 800 1.4rem var(--font-mono); color: var(--accent-dark); margin: 0 0 6px; }
.section .sub { color: var(--muted); margin: 0 0 20px; }
.cards { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 290px), 1fr)); }
.card {
  display: flex; flex-direction: column; gap: 8px; padding: 20px; border: 1px solid var(--border); border-radius: 14px;
  background: #fff; text-decoration: none; color: var(--text); transition: box-shadow .15s, border-color .15s;
}
.card:hover { border-color: var(--accent); box-shadow: 0 6px 20px rgba(11,92,171,.12); }
.card .ico { width: 42px; height: 42px; border-radius: 10px; background: var(--accent-tint); color: var(--accent-dark); display: grid; place-items: center; font: 800 1.05rem var(--font-mono); }
.card h3 { font: 800 1.08rem var(--font-mono); color: var(--accent-dark); margin: 4px 0 0; }
.card p { margin: 0; font-size: .92rem; color: var(--muted); }
.card .meta { margin-top: auto; padding-top: 6px; font-size: .8rem; color: var(--accent-dark); font-weight: 600; }
.card.multi { cursor: default; }
.card.multi:hover { border-color: var(--border); box-shadow: none; }
.rt-links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: auto; padding-top: 8px; }
.rt-links a { text-decoration: none; font: 700 .82rem var(--font-mono); border: 1px solid var(--accent); color: var(--accent-dark); border-radius: 999px; padding: 6px 12px; background: var(--accent-soft); }
.rt-links a:hover { background: var(--accent); color: #fff; }
.chapter-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.chapter-list a { display: block; padding: 14px 16px; border: 1px solid var(--border); border-radius: 10px; text-decoration: none; color: var(--text); }
.chapter-list a:hover { border-color: var(--accent); background: var(--accent-soft); }
.chapter-list b { display: block; font: 700 .98rem var(--font-mono); color: var(--accent-dark); overflow-wrap: break-word; }
.chapter-list span { font-size: .88rem; color: var(--muted); }
.landing-head { margin-bottom: 22px; }
.landing-head h1 { font: 800 1.9rem var(--font-mono); color: var(--accent-dark); margin: 0 0 8px; }
.landing-head p { color: var(--muted); font-size: 1.05rem; margin: 0 0 16px; max-width: 46em; }
.pdf-list { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr)); }
.pdf-list a { display: flex; justify-content: space-between; gap: 12px; padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px; text-decoration: none; color: var(--accent-dark); font-weight: 600; font-size: .9rem; }
.pdf-list a:hover { background: var(--accent-tint); }
.pdf-list small { color: var(--muted); font-weight: 500; white-space: nowrap; }

/* Search dialog */
.search-dialog { border: 0; padding: 0; width: min(94vw, 720px); max-height: 82vh; margin: 8vh auto 0; border-radius: 14px; box-shadow: 0 20px 60px rgba(15,23,42,.35); overflow: hidden; color: var(--text); }
.search-dialog[open] { display: flex; flex-direction: column; }
.search-dialog::backdrop { background: rgba(15,23,42,.5); }
.search-top { display: flex; gap: 10px; padding: 14px; border-bottom: 1px solid var(--border); }
.search-top input {
  flex: 1; min-width: 0; font: 500 1rem var(--font-sans); padding: 11px 14px; border: 2px solid var(--accent); border-radius: 10px; color: var(--text);
}
.search-results { overflow-y: auto; scrollbar-width: none; padding: 8px; flex: 1; min-height: 80px; }
.search-results::-webkit-scrollbar { display: none; }
.search-results .hint { padding: 18px 12px; color: var(--muted); font-size: .92rem; }
.search-results ul { list-style: none; margin: 0; padding: 0; }
.search-results a { display: block; padding: 10px 12px; border-radius: 8px; text-decoration: none; color: var(--text); }
.search-results a:hover, .search-results a.sel { background: var(--accent-tint); }
.search-results .rt { font: 700 .95rem var(--font-mono); color: var(--accent-dark); overflow-wrap: break-word; }
.search-results .path { font-size: .76rem; color: var(--muted); margin: 1px 0 3px; }
.search-results .snip { font-size: .86rem; color: var(--muted); overflow-wrap: break-word; }
.search-results mark { background: #FFE9A8; color: #2B2100; padding: 0 1px; border-radius: 2px; }

/* Lightbox */
.lightbox { border: 0; padding: 0; background: transparent; max-width: 96vw; max-height: 96vh; overflow: visible; }
.lightbox::backdrop { background: rgba(15,23,42,.82); }
.lightbox img { display: block; max-width: 96vw; max-height: 86vh; width: auto; height: auto; background: #fff; border-radius: 6px; }
.lightbox .cap { color: #fff; font-size: .88rem; padding: 10px 2px 0; max-width: 90ch; }
.lightbox .close { position: absolute; top: -14px; right: -6px; width: 38px; height: 38px; border-radius: 50%; border: 2px solid #fff; background: var(--accent-dark); color: #fff; font-size: 1.2rem; cursor: pointer; }

/* Embedded mode (iframe): the host site supplies its own header and footer */
html.embedded .site-header, html.embedded .site-footer, html.embedded .crumbs { display: none; }
html.embedded .sidebar { top: 0; }
html.embedded .toc-col { top: 12px; }

@media (min-width: 640px) {
  .pager { grid-template-columns: 1fr 1fr; }
  .search-btn .lbl { display: inline; }
  .content-col { padding: 28px 28px 60px; }
}
@media (min-width: 900px) {
  .menu-btn, .scrim, .sidebar .close-nav { display: none !important; }
  .layout { display: grid; grid-template-columns: 290px minmax(0, 1fr); }
  .sidebar {
    position: sticky; top: 64px; height: calc(100vh - 64px); width: auto; transform: none; visibility: visible;
    z-index: 1; box-shadow: none !important;
  }
  html.embedded .sidebar { top: 0; height: 100vh; }
}
@media (min-width: 1180px) {
  .page-grid { display: grid; grid-template-columns: minmax(0, 1fr) 230px; gap: 36px; align-items: start; }
  .toc-col { position: sticky; top: 84px; order: 2; max-height: calc(100vh - 110px); overflow-y: auto; scrollbar-width: none; }
  .toc-col::-webkit-scrollbar { display: none; }
  .toc-box { border: 0; background: none; margin: 0; }
  .toc-box summary { pointer-events: none; padding-left: 0; }
  .toc-box ul { padding: 0 0 0 0; border-left: 1px solid var(--border); }
  .toc-box li a { padding: 4px 0 4px 12px; margin-left: -1px; border-left: 2px solid transparent; }
  .toc-box li.l3 a { padding-left: 26px; }
  .toc-box li a.active { border-left-color: var(--accent); }
  .toc-box li a:hover { text-decoration: none; }
}
@media (min-width: 1060px) { .top-nav { display: flex; } }
@media (max-width: 420px) {
  .brand .brand-sub, .search-btn kbd { display: none; }
  .brand img { height: 30px; width: auto; max-width: 100%; }
  .site-header { padding: 0 12px; gap: 8px; }
  .content-col { padding-left: 14px; padding-right: 14px; }
}
@media print {
  .site-header, .sidebar, .toc-col, .pager, .site-footer, .scrim, .copy-btn, .anchor { display: none !important; }
  .layout { display: block; }
}