* { box-sizing: border-box; }
body { font-family: 'Inter', system-ui, sans-serif; margin: 0; background: var(--bg); color: var(--text); }

[x-cloak] { display: none !important; }

.topbar {
  display: flex; align-items: center; gap: 1rem;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-elev);
  position: sticky; top: 0; z-index: 30;
}
.topbar-title { font-weight: 600; flex: 1; }
.back-link { display: inline-flex; gap: 0.4rem; align-items: center; text-decoration: none; color: var(--text-muted); padding: 0.4rem 0.6rem; border-radius: 6px; }
.role-badge {
  background: var(--accent-bg);
  color: var(--accent);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 500;
}

/* Mobile menu button — sticks in the topbar, only shown < 800 px */
.topbar-menu-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.45rem 0.6rem;
  border-radius: 8px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.topbar-menu-btn:hover { background: var(--bg-hover); }

.handbook-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  height: calc(100vh - 60px);
  position: relative;
}

.sidebar {
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  background: var(--bg-elev);
  overflow: hidden;
}
.search-input {
  margin: 1rem;
  padding: 0.6rem 0.85rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--text);
}
.search-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-bg); }

.categories, .search-results {
  flex: 1;
  overflow-y: auto;
  padding: 0 1rem 1rem;
}
.search-results h4 { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-muted); margin: 0 0 0.5rem; }

.category { margin-bottom: 1rem; }
.category > summary {
  cursor: pointer;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  color: var(--text-muted);
  padding: 0.5rem 0;
  user-select: none;
}

.article-link {
  display: flex; align-items: center; gap: 0.4rem;
  width: 100%;
  text-align: left;
  background: transparent;
  border: 1px solid transparent;
  padding: 0.5rem 0.65rem;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.88rem;
  color: var(--text);
  margin-bottom: 0.15rem;
  transition: background 120ms ease, border-color 120ms ease;
}
.article-link:hover { background: var(--bg-hover); }
.article-link.active { background: var(--accent-bg); color: var(--accent); border-color: var(--accent); }
.article-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}
.article-title { flex: 1; }

/* Search-hit row: stack title + snippet vertically so the user sees a
   preview of WHY the hit matched — much more useful than a numeric
   relevance score. */
.search-hit {
  align-items: flex-start;
  padding: 0.55rem 0.7rem;
}
.search-hit-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.search-hit-snippet {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.4;
  /* Clamp to two lines so the sidebar doesn't grow unbounded. */
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.role-pill {
  font-size: 0.65rem;
  padding: 0.05rem 0.4rem;
  border-radius: 4px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.role-pill.role-ATRIUM_GUEST { background: var(--surface-2); color: var(--ink-3); }
.role-pill.role-ATRIUM_READ { background: var(--info-tint); color: var(--info); }
.role-pill.role-ATRIUM_WRITE { background: var(--ok-tint); color: var(--ok); }
.role-pill.role-ATRIUM_ADMIN { background: var(--accent-tint); color: var(--accent); }
.role-pill.role-ATRIUM_TENANT_ADMIN { background: var(--warn-tint); color: var(--warn); }
.role-pill.role-ATRIUM_SYSTEM { background: var(--error-tint); color: var(--error); }

.content {
  overflow-y: auto;
}
.article {
  max-width: 800px;
  margin: 0 auto;
  padding: 2.5rem 3rem;
}
.article h1 { font-size: 2rem; margin: 0 0 0.5rem; }
.article-meta {
  display: flex; gap: 0.4rem; align-items: center; flex-wrap: wrap;
  margin-bottom: 2rem;
}
.tag { background: var(--bg-elev); padding: 0.15rem 0.5rem; border-radius: 4px; color: var(--text-muted); font-size: 0.75rem; }

/* Mobile breadcrumb — invisible on desktop, visible on small screens
   to give context when the sidebar is collapsed. */
.mobile-breadcrumb {
  display: none;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--text-muted);
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-elev);
}
.mobile-breadcrumb-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font: inherit;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--border);
  padding: 4px 8px;
  border-radius: 6px;
  cursor: pointer;
}
.mobile-breadcrumb-btn:hover { background: var(--bg-hover); color: var(--text); }
.mobile-breadcrumb-sep { color: var(--text-muted); opacity: 0.6; }
.mobile-breadcrumb-current { color: var(--text-muted); }
.mobile-breadcrumb-current.is-leaf { color: var(--text); font-weight: 500; }

.welcome {
  max-width: 600px;
  margin: 4rem auto;
  text-align: center;
  color: var(--text-muted);
}
.welcome h2 { color: var(--text); }

.loading-state {
  margin: 4rem auto;
  text-align: center;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
}

/* Backdrop for the mobile sidebar overlay */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 20;
}

/* Markdown rendering */
.markdown-body {
  line-height: 1.7;
  font-size: 1rem;
  color: var(--text);
}
.markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body h4 {
  margin: 2rem 0 0.75rem;
}
.markdown-body h1 { display: none; }  /* already shown above */
.markdown-body h2 {
  font-size: 1.4rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.4rem;
}
.markdown-body h3 { font-size: 1.15rem; }
.markdown-body p { margin: 0.75rem 0; }
.markdown-body code {
  background: var(--bg-elev);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-size: 0.85em;
  font-family: ui-monospace, monospace;
}
.markdown-body pre {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.5;
}
.markdown-body pre code {
  background: transparent;
  padding: 0;
}
.markdown-body blockquote {
  border-left: 4px solid var(--accent);
  padding: 0.5rem 1rem;
  margin: 1rem 0;
  background: var(--accent-bg);
  border-radius: 4px;
  color: var(--text-muted);
}
.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.9rem;
}
.markdown-body th, .markdown-body td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.75rem;
  text-align: left;
}
.markdown-body th { background: var(--bg-elev); font-weight: 600; }
.markdown-body ul, .markdown-body ol { padding-left: 1.5rem; margin: 0.75rem 0; }
.markdown-body li { margin: 0.25rem 0; }
.markdown-body a { color: var(--accent); }
.markdown-body a:hover { text-decoration: underline; }
.markdown-body hr { border: none; border-top: 1px solid var(--border); margin: 2rem 0; }

@media (max-width: 800px) {
  .handbook-layout { grid-template-columns: 1fr; }
  .article { padding: 1.5rem; }

  /* Sidebar slides in as an overlay panel on mobile. is-mobile-open
     class toggles transform back to 0. */
  .sidebar {
    position: fixed;
    top: 60px;
    left: 0;
    bottom: 0;
    width: min(320px, 85vw);
    transform: translateX(-100%);
    transition: transform 200ms ease;
    z-index: 25;
    box-shadow: 0 8px 32px rgba(0,0,0,0.12);
  }
  .sidebar.is-mobile-open { transform: translateX(0); }

  .sidebar-backdrop { display: block; }
  .topbar-menu-btn { display: inline-flex; }

  /* Show breadcrumb only on mobile */
  .mobile-breadcrumb { display: flex; }
}