:root {
  /* SPH Media Harmony Blue (diagrams + UI showcase alignment) */
  --sph-50: #E8F2FA;
  --sph-100: #C5DFF5;
  --sph-500: #0057A8;
  --sph-600: #004A8F;
  --sph-700: #003D73;
  --sph-900: #071525;

  /* Brand palette — single source of truth */
  --qs-primary: #059669;
  --qs-primary-hover: #047857;
  --qs-primary-dark: #065f46;
  --qs-primary-light: #d1fae5;
  --qs-primary-muted: #ecfdf5;
  --qs-accent: #f97316;
  --qs-navy: #0f172a;
  --qs-navy-soft: #1e293b;
  --qs-heading: var(--qs-navy);
  --qs-heading-muted: var(--qs-navy-soft);
  --qs-table-head-bg: var(--qs-navy);
  --qs-table-head-text: #ffffff;
  --qs-surface: #ffffff;
  --qs-bg: #f1f5f9;
  --qs-bg-elevated: #ffffff;
  --qs-text: #0f172a;
  --qs-muted: #64748b;
  --qs-border: #e2e8f0;
  --qs-border-strong: #cbd5e1;
  --qs-shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
  --qs-shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);

  /* Layout */
  --sidebar-width: 300px;
  --topbar-height: 64px;
  --footer-height: 118px;
  --content-max: 1120px;
  --diagram-min-height: 720px;
  --diagram-canvas-bg: var(--qs-bg);
  --diagram-grid-color: rgba(0, 87, 168, 0.08);
  --diagram-node-bg: rgba(232, 242, 250, 0.92);
  --diagram-cluster-bg: rgba(241, 245, 249, 0.55);
  --diagram-text: var(--sph-900);
  --diagram-line: var(--sph-700);
  --diagram-title-color: var(--sph-700);

  /* Typography scale */
  --font: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --leading: 1.65;

  --focus-ring: 0 0 0 3px rgba(5, 150, 105, 0.35);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--text-base);
  line-height: var(--leading);
  color: var(--qs-text);
  background: var(--qs-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: 10000;
  padding: 0.75rem 1.25rem;
  background: var(--qs-primary);
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
}
.skip-link:focus { top: 1rem; outline: none; box-shadow: var(--focus-ring); }

/* Top bar */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  min-height: var(--topbar-height);
  background: var(--qs-surface);
  border-bottom: 1px solid var(--qs-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0 1.25rem 0 1rem;
  z-index: 200;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.topbar-nav-toggle { display: none; }

.topbar-nav-toggle-icon {
  display: block;
  width: 20px;
  height: 20px;
}

.topbar-nav-backdrop {
  display: none;
  position: fixed;
  inset: var(--topbar-height) 0 0 0;
  background: rgba(15, 23, 42, 0.35);
  z-index: 198;
}

.topbar-nav-backdrop:not([hidden]) { display: block; }

body.topbar-nav-body-lock { overflow: hidden; }

.topbar-left { display: flex; align-items: center; gap: 1rem; flex-shrink: 0; min-width: 0; }

.topbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.topbar-brand-link {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  border-radius: 6px;
  text-decoration: none;
  transition: opacity 0.15s ease;
}

.topbar-brand-link:hover { opacity: 0.85; }

.topbar-brand-link:focus-visible {
  outline: 2px solid var(--qs-accent, #0d9488);
  outline-offset: 2px;
}

.topbar-sph-logo {
  height: 48px;
  width: auto;
  display: block;
  object-fit: contain;
  flex-shrink: 0;
}

.topbar-brand-sep {
  width: 1px;
  height: 36px;
  background: var(--qs-border);
  flex-shrink: 0;
}

.logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  background: transparent;
  box-shadow: none;
  padding: 0;
}

.logo-link img,
.logo-link svg {
  height: 36px;
  width: auto;
  display: block;
}

.doc-badge {
  font-size: var(--text-sm);
  color: var(--qs-muted);
  border-left: 1px solid var(--qs-border);
  padding-left: 1rem;
  max-width: 420px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
  flex: 1;
  justify-content: flex-end;
}

.topbar-nav {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  justify-content: flex-end;
  gap: 0.5rem;
  min-width: 0;
}

.topbar-nav .btn {
  flex-shrink: 0;
  padding: 0.45rem 0.75rem;
  font-size: 0.8125rem;
  white-space: nowrap;
}

.topbar-doc-menu {
  position: relative;
  flex-shrink: 0;
}

.topbar-doc-summary {
  list-style: none;
}

.topbar-doc-summary::-webkit-details-marker {
  display: none;
}

.topbar-doc-summary::after {
  content: "▾";
  margin-left: 0.35rem;
  font-size: 0.7rem;
  color: var(--qs-muted);
}

.topbar-doc-menu[open] .topbar-doc-summary {
  background: var(--qs-bg);
  border-color: var(--qs-border-strong);
}

.topbar-doc-menu__items {
  position: absolute;
  top: calc(100% + 0.35rem);
  left: 0;
  min-width: 11rem;
  padding: 0.35rem;
  border: 1px solid var(--qs-border);
  border-radius: 10px;
  background: var(--qs-surface);
  box-shadow: var(--qs-shadow);
  z-index: 260;
}

.topbar-doc-menu__items .btn {
  display: flex;
  width: 100%;
  justify-content: flex-start;
  border-color: transparent;
}

.topbar-doc-menu__items .btn:hover {
  background: var(--qs-bg);
  border-color: transparent;
}

.topbar-end {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.topbar-end > .btn:not(.btn-icon):not(.btn-lang) {
  flex-shrink: 0;
  padding: 0.45rem 0.75rem;
  font-size: 0.8125rem;
  white-space: nowrap;
}

.topbar-review-slot:not(:empty) { flex-shrink: 0; }
.topbar-review-slot:empty { display: none; }

.review-toolbar-btn {
  padding: 0.45rem 0.75rem;
  font-size: 0.8125rem;
  white-space: nowrap;
}

.review-toolbar-btn.btn-icon {
  position: relative;
  padding: 0.5rem;
  min-width: 40px;
}

.topbar-icon {
  display: block;
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
}

.topbar-icon-badge {
  position: absolute;
  top: 1px;
  right: 1px;
  min-width: 1rem;
  height: 1rem;
  margin-left: 0;
  padding: 0 0.2rem;
  font-size: 0.625rem;
  line-height: 1;
  pointer-events: none;
}

.btn-lang {
  min-width: 40px;
  justify-content: center;
}

.btn-lang.btn-icon {
  padding: 0.5rem;
}

.btn-busy {
  opacity: 0.55;
  cursor: wait;
}

.lang-loading-banner {
  position: fixed;
  top: 4.25rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2000;
  padding: 0.65rem 1.25rem;
  border-radius: 999px;
  background: var(--sph-700, #003d73);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
  pointer-events: none;
}

.lang-loading-banner--error {
  background: #b42318;
}

body.lang-loading .main-content {
  opacity: 0.55;
  transition: opacity 0.2s ease;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  font-family: var(--font);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: 8px;
  border: 1px solid var(--qs-border);
  background: var(--qs-surface);
  color: var(--qs-text);
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.btn:hover { background: var(--qs-bg); border-color: var(--qs-border-strong); }
.btn:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.btn-primary { background: var(--qs-primary); color: #fff; border-color: var(--qs-primary); }
.btn-primary:hover { background: var(--qs-primary-hover); border-color: var(--qs-primary-hover); }
.btn-nav-current {
  background: var(--qs-primary-muted);
  border-color: var(--qs-primary);
  color: var(--qs-primary-dark);
  cursor: default;
  pointer-events: none;
}
.btn-icon { padding: 0.5rem; min-width: 40px; justify-content: center; }

.menu-toggle { display: none; }

/* Layout */
.app-layout {
  display: flex;
  padding-top: var(--topbar-height);
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  position: fixed;
  top: var(--topbar-height);
  left: 0;
  width: var(--sidebar-width);
  height: calc(100vh - var(--topbar-height));
  background: var(--qs-surface);
  border-right: 1px solid var(--qs-border);
  display: flex;
  flex-direction: column;
  z-index: 150;
  transition: transform 0.25s ease;
}

.sidebar-header {
  padding: 1rem 1rem 0.75rem;
  border-bottom: 1px solid var(--qs-border);
}

.sidebar-header-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.sidebar-header-actions {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-shrink: 0;
}

.sidebar-collapse {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  padding: 0;
  border: 1px solid var(--qs-border);
  border-radius: 6px;
  background: var(--qs-bg);
  color: var(--qs-muted);
  font-size: 0.75rem;
  line-height: 1;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.sidebar-collapse:hover {
  background: var(--qs-surface);
  color: var(--qs-text);
  border-color: var(--qs-muted);
}

.sidebar-collapse:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* Desktop: collapsed sidebar — content expands full width */
body.sidebar-collapsed .sidebar {
  transform: translateX(-100%);
}

body.sidebar-collapsed .main-content {
  margin-left: 0;
}

body.sidebar-collapsed .content-wrap {
  max-width: min(calc(var(--content-max) + var(--sidebar-width)), calc(100vw - 5rem));
}

body.sidebar-collapsed .menu-toggle {
  display: inline-flex;
}

.sidebar-title {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--qs-muted);
  margin: 0;
}

.search-wrap { position: relative; }

.search-input {
  width: 100%;
  padding: 0.6rem 0.75rem 0.6rem 2.25rem;
  font-family: var(--font);
  font-size: var(--text-sm);
  border: 1px solid var(--qs-border);
  border-radius: 8px;
  background: var(--qs-bg);
  color: var(--qs-text);
}
.search-input:focus { outline: none; border-color: var(--qs-primary); box-shadow: var(--focus-ring); }

.search-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--qs-muted);
  pointer-events: none;
  font-size: 0.9rem;
}

.search-hint {
  font-size: var(--text-xs);
  color: var(--qs-muted);
  margin: 0.4rem 0 0;
  line-height: 1.4;
}

.toc-nav {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem 0.5rem 2rem;
}

.toc-group { margin-bottom: 0.25rem; }

.toc-group-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.5rem 0.75rem;
  font-family: var(--font);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--qs-heading);
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  border-radius: 6px;
}
.toc-group-title:hover { background: var(--qs-bg); }
.toc-group-title:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.toc-group-title .num { color: var(--qs-primary); margin-right: 0.35rem; }

.toc-items {
  list-style: none;
  margin: 0;
  padding: 0 0 0 0.5rem;
}
.toc-items.collapsed { display: none; }

.toc-items a {
  display: block;
  padding: 0.35rem 0.75rem 0.35rem 1.25rem;
  font-size: var(--text-sm);
  color: var(--qs-muted);
  text-decoration: none;
  border-radius: 6px;
  border-left: 2px solid transparent;
  line-height: 1.4;
}
.toc-items a:hover { color: var(--qs-primary); background: var(--qs-primary-light); }
.toc-items a.active {
  color: var(--qs-primary-dark);
  font-weight: 600;
  background: var(--qs-primary-light);
  border-left-color: var(--qs-primary);
}
.toc-items a:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.toc-items a.hidden { display: none; }
.toc-group.hidden { display: none; }

.sidebar-footer {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--qs-border);
  font-size: var(--text-xs);
  color: var(--qs-muted);
  line-height: 1.5;
}

/* Main content */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-width: 0;
  padding-bottom: var(--footer-height);
}

.content-wrap {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 2rem 2.5rem 4rem;
}

/* Hero cover */
.hero-cover {
  background: linear-gradient(135deg, var(--qs-navy) 0%, #1e293b 50%, #065f46 100%);
  color: #fff;
  border-radius: 16px;
  padding: 2.5rem 2.5rem 2rem;
  margin-bottom: 2.5rem;
  box-shadow: var(--qs-shadow);
  position: relative;
  overflow: hidden;
}
.hero-cover::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(circle, rgba(16,185,129,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.sph-logo-mark { height: 32px; width: auto; display: block; object-fit: contain; }
.sph-logo-mark--hero {
  position: relative;
  z-index: 1;
  margin-bottom: 1.25rem;
  background: #fff;
  border-radius: 8px;
  padding: 6px 12px;
  box-sizing: content-box;
}

.hero-logo-link {
  display: inline-block;
  position: relative;
  z-index: 1;
  margin-bottom: 1.25rem;
  border-radius: 6px;
  text-decoration: none;
  transition: opacity 0.15s ease;
}

.hero-logo-link:hover { opacity: 0.85; }

.hero-logo-link:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.85);
  outline-offset: 3px;
}

.hero-logo-link .sph-logo-mark--hero { margin-bottom: 0; }
.hero-cover .eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #6ee7b7;
  margin-bottom: 0.75rem;
}
.hero-cover h1 {
  font-size: 1.85rem;
  font-weight: 800;
  line-height: 1.25;
  margin: 0 0 0.5rem;
  border: none;
  color: #fff;
}
.hero-cover .subtitle {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.85);
  margin: 0 0 1.5rem;
  font-weight: 400;
}
.meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.75rem;
}
.meta-card {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 10px;
  padding: 0.75rem 1rem;
}
.meta-card .label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(255,255,255,0.6);
  margin-bottom: 0.2rem;
}
.meta-card .value { font-size: 0.9rem; font-weight: 600; color: #fff; }

.confidential-banner {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1.25rem;
  padding: 0.35rem 0.75rem;
  background: rgba(249,115,22,0.2);
  border: 1px solid rgba(249,115,22,0.4);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  color: #fed7aa;
}

/* Prose — unified typography */
.prose {
  font-size: var(--text-base);
  line-height: var(--leading);
}

.prose h1 {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--qs-heading);
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 3px solid var(--qs-primary);
  scroll-margin-top: calc(var(--topbar-height) + 1rem);
  line-height: 1.3;
}
.prose h1:first-child { margin-top: 0; }

.prose h2 {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--qs-primary-dark);
  margin: 2rem 0 0.75rem;
  scroll-margin-top: calc(var(--topbar-height) + 1rem);
  line-height: 1.35;
}

.prose h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--qs-heading);
  margin: 1.5rem 0 0.5rem;
  scroll-margin-top: calc(var(--topbar-height) + 1rem);
  line-height: 1.4;
}

.prose h4 {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--qs-heading-muted);
  margin: 1.25rem 0 0.5rem;
  scroll-margin-top: calc(var(--topbar-height) + 1rem);
}

.prose p { margin: 0.75rem 0; }
.prose ul, .prose ol { padding-left: 1.5rem; margin: 0.75rem 0; }
.prose li { margin: 0.35rem 0; }
.prose blockquote {
  margin: 1rem 0;
  padding: 0.75rem 1rem;
  border-left: 4px solid var(--qs-primary);
  background: var(--qs-primary-muted);
  border-radius: 0 8px 8px 0;
  color: var(--qs-heading-muted);
}
.prose blockquote p { margin: 0; }
.prose hr { border: none; border-top: 1px solid var(--qs-border); margin: 2rem 0; }
.prose strong { font-weight: 700; color: var(--qs-heading); }
.prose em { color: var(--qs-heading-muted); }

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: var(--text-sm);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--qs-shadow-sm);
  border: 1px solid var(--qs-border);
}
.prose th {
  background: var(--qs-table-head-bg);
  color: var(--qs-table-head-text);
  font-weight: 600;
  font-size: var(--text-sm);
  text-align: left;
  padding: 0.7rem 1rem;
}
.prose td {
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--qs-border);
  vertical-align: top;
  font-size: var(--text-sm);
  line-height: 1.5;
}
.prose tr:nth-child(even) td { background: var(--qs-bg-elevated); }
.prose tr:hover td { background: var(--qs-primary-muted); }
.prose tr:last-child td { border-bottom: none; }

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}
.team-card {
  background: var(--qs-surface);
  border: 1px solid var(--qs-border);
  border-radius: 12px;
  padding: 1.25rem;
  box-shadow: 0 2px 8px rgba(15,23,42,0.04);
  border-top: 3px solid var(--qs-primary);
}
.team-card .name { font-size: 1.05rem; font-weight: 800; color: var(--qs-heading); margin: 0 0 0.15rem; }
.team-card .role-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--qs-primary-dark);
  background: var(--qs-primary-light);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  margin-bottom: 0.5rem;
}
.team-card .title { font-size: 0.85rem; color: var(--qs-muted); margin: 0; line-height: 1.4; }

.prose code {
  background: var(--qs-bg);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
  color: var(--qs-primary-dark);
  border: 1px solid var(--qs-border);
}
.prose pre {
  background: var(--qs-navy);
  color: #e2e8f0;
  padding: 1.25rem;
  border-radius: 10px;
  overflow-x: auto;
  font-size: var(--text-sm);
  line-height: 1.55;
}

/* API specification cards (enhanced from pre/code blocks) */
.api-spec-stack {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin: 1.25rem 0;
}

.api-spec {
  margin: 1.25rem 0;
  border: 1px solid var(--qs-border);
  border-radius: 12px;
  overflow: hidden;
  background: var(--qs-surface);
  box-shadow: var(--qs-shadow-sm);
}

.api-spec__toolbar {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.7rem 1rem;
  background: linear-gradient(180deg, var(--qs-bg-elevated) 0%, var(--qs-bg) 100%);
  border-bottom: 1px solid var(--qs-border);
  flex-wrap: wrap;
}

.api-spec__method {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 3.25rem;
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #fff;
  flex-shrink: 0;
}

.api-spec__method--get { background: #0284c7; }
.api-spec__method--post { background: #059669; }
.api-spec__method--put { background: #7c3aed; }
.api-spec__method--patch { background: #d97706; }
.api-spec__method--delete { background: #dc2626; }

.api-spec__badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.65rem;
  border-radius: 6px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--sph-700);
  background: var(--sph-50);
  border: 1px solid var(--sph-100);
}

.api-spec__url {
  flex: 1;
  min-width: 0;
  font-family: ui-monospace, "Cascadia Code", "SF Mono", Consolas, monospace;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--qs-heading);
  background: transparent;
  border: none;
  padding: 0;
  word-break: break-all;
  line-height: 1.45;
}

.api-spec__copy {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: 1px solid var(--qs-border);
  border-radius: 8px;
  background: #fff;
  color: var(--qs-muted);
  cursor: pointer;
  flex-shrink: 0;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.api-spec__copy:hover {
  color: var(--qs-primary);
  border-color: var(--qs-primary);
  background: var(--qs-primary-muted);
}

.api-spec__copy--done {
  color: var(--qs-primary);
  border-color: var(--qs-primary);
  background: var(--qs-primary-muted);
}

.api-spec__headers {
  padding: 0.75rem 1rem;
  background: #fafbfc;
  border-bottom: 1px solid var(--qs-border);
}

.api-spec__section-label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--qs-muted);
  margin-bottom: 0.5rem;
}

.api-spec__header-row {
  display: flex;
  gap: 0.75rem;
  font-family: ui-monospace, "Cascadia Code", "SF Mono", Consolas, monospace;
  font-size: 0.78rem;
  line-height: 1.6;
  padding: 0.15rem 0;
}

.api-spec__header-key {
  color: #7c3aed;
  font-weight: 600;
  flex-shrink: 0;
}

.api-spec__header-key::after { content: ":"; }

.api-spec__header-value {
  color: var(--qs-heading);
  word-break: break-all;
}

.api-spec__body {
  background: #0f172a;
}

.api-spec__body .api-spec__section-label {
  padding: 0.55rem 1rem 0;
  margin-bottom: 0;
  color: #64748b;
}

.api-spec__code {
  margin: 0;
  padding: 0.75rem 1rem 1rem;
  background: transparent;
  border-radius: 0;
  overflow-x: auto;
  font-family: ui-monospace, "Cascadia Code", "SF Mono", Consolas, monospace;
  font-size: 0.78rem;
  line-height: 1.65;
  color: #e2e8f0;
  tab-size: 2;
}

.api-spec__code code {
  background: transparent;
  border: none;
  padding: 0;
  font-size: inherit;
  color: inherit;
}

.api-json-key { color: #7dd3fc; }
.api-json-string { color: #86efac; }
.api-json-number { color: #fcd34d; }
.api-json-literal { color: #f9a8d4; }

.api-spec__response {
  padding: 0.75rem 1rem;
  background: #f0fdf4;
  border-top: 1px solid #bbf7d0;
}

.api-spec__response-text {
  display: block;
  font-family: ui-monospace, "Cascadia Code", "SF Mono", Consolas, monospace;
  font-size: 0.78rem;
  line-height: 1.6;
  color: #166534;
  word-break: break-all;
  background: transparent;
  border: none;
  padding: 0;
}

.api-spec--url-only .api-spec__toolbar {
  border-bottom: none;
}

@media print {
  .api-spec {
    break-inside: avoid;
    box-shadow: none;
    border-color: #cbd5e1;
  }
  .api-spec__copy { display: none; }
}
.prose a {
  color: var(--qs-primary);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.prose a:hover { color: var(--qs-primary-hover); }

/* UI embed promo banner */
.ui-embed-banner {
  background: linear-gradient(135deg, var(--qs-navy) 0%, var(--qs-navy-soft) 55%, var(--qs-primary-dark) 100%);
  color: #fff;
  border-radius: 16px;
  padding: 1.75rem 2rem;
  margin: 1.5rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  box-shadow: var(--qs-shadow);
}
.ui-embed-banner h3 {
  margin: 0 0 0.35rem;
  font-size: var(--text-xl);
  font-weight: 700;
  color: #fff;
}
.ui-embed-banner p {
  margin: 0;
  opacity: 0.92;
  font-size: var(--text-sm);
  max-width: 560px;
  line-height: 1.5;
}
.ui-embed-banner .btn-embed {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 1.5rem;
  border-radius: 10px;
  background: #fff;
  color: var(--qs-heading);
  font-weight: 700;
  font-size: var(--text-sm);
  text-decoration: none;
  box-shadow: var(--qs-shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.ui-embed-banner .btn-embed:hover {
  transform: translateY(-1px);
  box-shadow: var(--qs-shadow);
}
.ui-embed-frame {
  width: 100%;
  height: 920px;
  border: 1px solid var(--qs-border);
  border-radius: 16px;
  margin: 0 0 2rem;
  box-shadow: var(--qs-shadow-sm);
}

/* Admin portal screen previews (proposal Section 4.6) */
.screen-preview {
  margin: 1.25rem 0 1.75rem;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--qs-border);
  box-shadow: var(--qs-shadow);
  background: #fff;
}
.screen-preview figcaption {
  margin: 0;
  padding: 0.75rem 1.25rem;
  font-size: var(--text-xs);
  color: var(--qs-muted);
  background: var(--qs-bg);
  border-top: 1px solid var(--qs-border);
}
.screen-preview figcaption a { font-weight: 600; }
.screen-preview-frame {
  display: grid;
  grid-template-columns: 168px 1fr;
  min-height: 380px;
  font-size: 0.8125rem;
  line-height: 1.4;
}
.sp-side {
  background: var(--sph-900);
  color: rgba(255, 255, 255, 0.7);
  display: flex;
  flex-direction: column;
}
.sp-side-brand {
  padding: 1rem 0.875rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.sp-brand-mark {
  display: block;
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 0.35rem;
}
.sp-side-title {
  display: block;
  font-size: 0.6875rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.65);
}
.sp-side-url {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.625rem;
  font-family: ui-monospace, monospace;
  color: rgba(255, 255, 255, 0.35);
}
.sp-nav { padding: 0.5rem 0; flex: 1; }
.sp-nav-item {
  display: block;
  padding: 0.5rem 0.875rem;
  font-size: 0.75rem;
  border-left: 3px solid transparent;
}
.sp-nav-item.active {
  background: rgba(0, 87, 168, 0.4);
  color: #fff;
  font-weight: 600;
  border-left-color: var(--sph-100);
}
.sp-main {
  display: flex;
  flex-direction: column;
  background: #f8fafc;
  min-width: 0;
}
.sp-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding: 0.875rem 1.25rem;
  background: #fff;
  border-bottom: 1px solid var(--qs-border);
}
.sp-screen-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--sph-700);
}
.sp-topbar-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.sp-pill {
  padding: 0.3rem 0.65rem;
  border-radius: 6px;
  border: 1px solid var(--qs-border);
  background: #fff;
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--qs-muted);
}
.sp-user {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.2rem 0.65rem 0.2rem 0.2rem;
  border-radius: 999px;
  border: 1px solid var(--qs-border);
  background: #fff;
  font-size: 0.6875rem;
  font-weight: 600;
}
.sp-avatar {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: var(--sph-500);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.5625rem;
  font-weight: 700;
}
.sp-content { padding: 1rem 1.25rem 1.25rem; }
.sp-section-label {
  margin: 0 0 0.65rem;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--qs-muted);
}
.sp-kpis {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.sp-kpi {
  position: relative;
  padding: 0.875rem 1rem;
  background: #fff;
  border: 1px solid var(--qs-border);
  border-radius: 10px;
  overflow: hidden;
}
.sp-kpi::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--sph-500);
}
.sp-kpi-val {
  display: block;
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--sph-700);
  line-height: 1.1;
}
.sp-kpi-sub { font-size: 0.875rem; font-weight: 600; color: var(--qs-muted); }
.sp-kpi-lbl {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.6875rem;
  color: var(--qs-muted);
}
.sp-kpi-delta {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.625rem;
  font-weight: 600;
}
.sp-kpi-delta.up { color: #059669; }
.sp-kpi-delta.down { color: #dc2626; }
.sp-charts {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.sp-chart {
  padding: 0.875rem 1rem;
  background: #fff;
  border: 1px solid var(--qs-border);
  border-radius: 10px;
}
.sp-chart h5 {
  margin: 0 0 0.65rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: #475569;
}
.sp-chart--donut { text-align: center; }
.sp-chart-note {
  margin: 0.35rem 0 0;
  font-size: 0.6875rem;
  color: var(--qs-muted);
}
.sp-status {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1rem;
  padding: 0.75rem 1rem;
  background: #fff;
  border: 1px solid var(--qs-border);
  border-radius: 10px;
}
.sp-status-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.6875rem;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
}
.sp-dot {
  width: 0.4375rem;
  height: 0.4375rem;
  border-radius: 50%;
  flex-shrink: 0;
  align-self: center;
}
.sp-status-chip .sp-status-text {
  line-height: 1;
}
.sp-dot.green { background: #059669; }
.sp-dot.amber { background: #d97706; }
.sp-dot.red { background: #dc2626; }

.sp-note {
  margin: 0 0 0.75rem;
  font-size: 0.6875rem;
  color: var(--qs-muted);
}
.sp-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.65rem;
}
.sp-btn {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.65rem;
  border-radius: 6px;
  border: 1px solid var(--qs-border);
  background: #fff;
  font-size: 0.625rem;
  font-weight: 600;
  color: #475569;
}
.sp-btn-primary {
  background: var(--sph-500);
  border-color: var(--sph-500);
  color: #fff;
}
.sp-live-split {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 0.75rem;
  min-height: 220px;
}
.sp-panel {
  background: #fff;
  border: 1px solid var(--qs-border);
  border-radius: 10px;
  overflow: hidden;
}
.sp-panel-head {
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid var(--qs-border);
  background: #f8fafc;
  font-size: 0.6875rem;
  font-weight: 700;
  color: #475569;
}
.sp-tbl {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.625rem;
}
.sp-tbl th {
  text-align: left;
  padding: 0.45rem 0.6rem;
  font-size: 0.5625rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--qs-muted);
  background: #f8fafc;
  border-bottom: 1px solid var(--qs-border);
}
.sp-tbl td {
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid #f1f5f9;
  vertical-align: top;
}
.sp-tbl tr:last-child td { border-bottom: none; }
.sp-tbl tr.sel td { background: var(--sph-50); }
.sp-badge {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  font-size: 0.5625rem;
  font-weight: 700;
}
.sp-badge.ai { background: #ecfdf5; color: #059669; }
.sp-badge.wait { background: #fffbeb; color: #d97706; }
.sp-badge.esc { background: #fef2f2; color: #dc2626; }
.sp-badge.ok { background: #ecfdf5; color: #059669; }
.sp-badge.pend { background: #fffbeb; color: #d97706; }
.sp-badge.draft { background: #f1f5f9; color: #64748b; }
.sp-transcript {
  padding: 0.65rem 0.75rem;
  font-size: 0.625rem;
  line-height: 1.55;
  max-height: 140px;
  overflow: hidden;
}
.sp-transcript p { margin: 0 0 0.45rem; }
.sp-transcript strong { color: var(--sph-700); }
.sp-transcript .sys { color: var(--qs-muted); font-style: italic; }
.sp-panel-foot {
  padding: 0.55rem 0.75rem;
  border-top: 1px solid var(--qs-border);
  display: flex;
  gap: 0.4rem;
}

.sp-journey-split {
  display: grid;
  grid-template-columns: 1fr 180px;
  gap: 0.75rem;
}
.sp-j-canvas {
  padding: 0.75rem;
  background: #fff;
  border: 1px solid var(--qs-border);
  border-radius: 10px;
  background-image: radial-gradient(circle, #e2e8f0 1px, transparent 1px);
  background-size: 14px 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
}
.sp-j-node {
  width: 100%;
  max-width: 220px;
  padding: 0.45rem 0.6rem;
  border-radius: 8px;
  border: 2px solid;
  font-size: 0.625rem;
  font-weight: 600;
  text-align: center;
}
.sp-j-node .jn-type {
  display: block;
  font-size: 0.5rem;
  text-transform: uppercase;
  opacity: 0.7;
  margin-bottom: 0.15rem;
}
.sp-j-node.trigger { background: #eef2ff; border-color: #6366f1; color: #4338ca; }
.sp-j-node.auth { background: #fff7ed; border-color: #f97316; color: #c2410c; }
.sp-j-node.action { background: #ecfdf5; border-color: #10b981; color: #047857; }
.sp-j-node.branch { background: #f5f3ff; border-color: #8b5cf6; color: #6d28d9; }
.sp-j-node.close { background: var(--sph-50); border-color: var(--sph-500); color: var(--sph-700); }
.sp-j-connector {
  width: 2px;
  height: 12px;
  background: #cbd5e1;
}
.sp-j-branch-row {
  display: flex;
  gap: 0.5rem;
  width: 100%;
  justify-content: center;
}
.sp-j-branch-row .sp-j-node { max-width: 105px; font-size: 0.5625rem; }
.sp-inspector {
  padding: 0.65rem;
  background: #fff;
  border: 1px solid var(--qs-border);
  border-radius: 10px;
  font-size: 0.625rem;
}
.sp-inspector h5 {
  margin: 0 0 0.5rem;
  font-size: 0.6875rem;
  color: var(--sph-700);
}
.sp-field {
  margin-bottom: 0.45rem;
}
.sp-field label {
  display: block;
  font-size: 0.5625rem;
  font-weight: 600;
  color: var(--qs-muted);
  margin-bottom: 0.2rem;
}
.sp-field input,
.sp-field select,
.sp-field textarea {
  width: 100%;
  padding: 0.3rem 0.45rem;
  border: 1px solid var(--qs-border);
  border-radius: 6px;
  font-size: 0.625rem;
  background: #f8fafc;
  color: #475569;
}

.sp-wizard {
  display: flex;
  gap: 0.35rem;
  margin-bottom: 0.65rem;
}
.sp-wiz-step {
  flex: 1;
  padding: 0.4rem 0.5rem;
  border-radius: 6px;
  border: 1px solid var(--qs-border);
  background: #fff;
  font-size: 0.5625rem;
  font-weight: 600;
  color: var(--qs-muted);
  text-align: center;
}
.sp-wiz-step.active {
  background: var(--sph-50);
  border-color: var(--sph-500);
  color: var(--sph-700);
}
.sp-cat-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}
.sp-cat-card {
  padding: 0.55rem;
  border: 1px solid var(--qs-border);
  border-radius: 8px;
  background: #fff;
  font-size: 0.625rem;
}
.sp-cat-card.selected {
  border-color: var(--sph-500);
  background: var(--sph-50);
}
.sp-cat-card h6 {
  margin: 0 0 0.2rem;
  font-size: 0.6875rem;
  color: var(--sph-700);
}
.sp-cat-card p {
  margin: 0;
  font-size: 0.5625rem;
  color: var(--qs-muted);
}

.sp-kpis--3 { grid-template-columns: repeat(3, 1fr); }
.sp-report-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.65rem;
}
.sp-report-card {
  padding: 0.75rem;
  background: #fff;
  border: 1px solid var(--qs-border);
  border-radius: 10px;
}
.sp-report-card h5 {
  margin: 0 0 0.25rem;
  font-size: 0.75rem;
  color: var(--sph-700);
}
.sp-report-card p {
  margin: 0 0 0.5rem;
  font-size: 0.625rem;
  color: var(--qs-muted);
}
.sp-report-metrics {
  display: flex;
  gap: 1rem;
  margin-bottom: 0.5rem;
}
.sp-rm-val {
  font-size: 1rem;
  font-weight: 800;
  color: var(--sph-700);
  line-height: 1;
}
.sp-rm-lbl {
  font-size: 0.5625rem;
  color: var(--qs-muted);
  margin-top: 0.15rem;
}

.sp-health-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.65rem;
  margin-bottom: 0.65rem;
}
.sp-health-tile {
  padding: 0.75rem;
  background: #fff;
  border: 1px solid var(--qs-border);
  border-radius: 10px;
  text-align: center;
}
.sp-gauge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  font-size: 0.6875rem;
  font-weight: 800;
  margin-bottom: 0.35rem;
}
.sp-gauge.green {
  background: #ecfdf5;
  color: #059669;
  border: 3px solid #059669;
}
.sp-health-tile strong {
  display: block;
  font-size: 0.6875rem;
  color: #334155;
}
.sp-health-tile p {
  margin: 0.2rem 0 0;
  font-size: 0.5625rem;
  color: var(--qs-muted);
}
.sp-progress {
  height: 5px;
  background: #e8edf3;
  border-radius: 3px;
  margin-top: 0.45rem;
  overflow: hidden;
}
.sp-progress span {
  display: block;
  height: 100%;
  background: var(--sph-500);
  border-radius: 3px;
}
.sp-warmup {
  padding: 0.65rem 0.75rem;
  background: #fff;
  border: 1px solid var(--qs-border);
  border-radius: 10px;
}
.sp-warmup h5 {
  margin: 0 0 0.5rem;
  font-size: 0.75rem;
  color: var(--sph-700);
}
.sp-warmup-day {
  display: flex;
  gap: 0.5rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid #f1f5f9;
  font-size: 0.625rem;
}
.sp-warmup-day:last-child { border-bottom: none; }
.sp-warmup-day.done .sp-wd-check { background: #059669; color: #fff; }
.sp-warmup-day.current .sp-wd-check { background: #d97706; color: #fff; }
.sp-wd-check {
  width: 1.1rem;
  height: 1.1rem;
  border-radius: 50%;
  background: #e2e8f0;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.5rem;
  font-weight: 700;
}
.sp-wd-info strong { display: block; color: #334155; }
.sp-wd-info span { color: var(--qs-muted); font-size: 0.5625rem; }

.sp-consent-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}
.sp-consent-card {
  padding: 0.75rem;
  background: #fff;
  border: 1px solid var(--qs-border);
  border-radius: 10px;
}
.sp-consent-card h5 {
  margin: 0 0 0.5rem;
  font-size: 0.75rem;
  color: var(--sph-700);
}
.sp-toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid #f1f5f9;
  font-size: 0.625rem;
}
.sp-toggle-row:last-child { border-bottom: none; }
.sp-toggle-row small {
  display: block;
  font-size: 0.5625rem;
  color: var(--qs-muted);
  font-weight: 400;
}
.sp-toggle {
  width: 2rem;
  height: 1.1rem;
  border-radius: 999px;
  background: var(--sph-500);
  position: relative;
  flex-shrink: 0;
}
.sp-toggle::after {
  content: "";
  position: absolute;
  top: 2px;
  right: 2px;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background: #fff;
}

.sp-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  margin-bottom: 0.65rem;
  border-bottom: 1px solid var(--qs-border);
  padding-bottom: 0.35rem;
}
.sp-tab {
  padding: 0.35rem 0.65rem;
  font-size: 0.625rem;
  font-weight: 600;
  color: var(--qs-muted);
  border-bottom: 2px solid transparent;
}
.sp-tab.active {
  color: var(--sph-500);
  border-bottom-color: var(--sph-500);
}
.sp-integ-list { display: flex; flex-direction: column; gap: 0.45rem; }
.sp-integ-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 7.5rem auto;
  align-items: center;
  gap: 0.5rem 0.75rem;
  padding: 0.55rem 0.75rem;
  background: #fff;
  border: 1px solid var(--qs-border);
  border-radius: 8px;
  font-size: 0.625rem;
}
.sp-integ-card strong { display: block; color: #334155; }
.sp-integ-card span.meta {
  display: block;
  font-size: 0.5625rem;
  color: var(--qs-muted);
  margin-top: 0.1rem;
}
.sp-integ-card .sp-status-chip {
  justify-self: start;
  color: #059669;
}
.sp-integ-card .sp-btn {
  justify-self: end;
}

@media (max-width: 960px) {
  .screen-preview-frame { grid-template-columns: 1fr; }
  .sp-side { display: none; }
  .sp-kpis { grid-template-columns: repeat(2, 1fr); }
  .sp-kpis--3 { grid-template-columns: 1fr; }
  .sp-charts { grid-template-columns: 1fr; }
  .sp-live-split,
  .sp-journey-split,
  .sp-consent-grid,
  .sp-report-grid,
  .sp-health-row,
  .sp-cat-cards { grid-template-columns: 1fr; }
}
@media print {
  .screen-preview { break-inside: avoid; box-shadow: none; }
}

/* Interactive diagram viewer */
.diagram-viewer {
  margin: 1.75rem -1rem;
  background: transparent;
  border: 1px solid var(--qs-border);
  border-radius: 14px;
  box-shadow: none;
  overflow: hidden;
}

.diagram-toolbar {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0.75rem;
  background: var(--qs-bg);
  border-bottom: 1px solid var(--qs-border);
  flex-wrap: wrap;
}

.diagram-toolbar-label {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--qs-muted);
  margin-right: auto;
}

.diagram-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2rem;
  height: 2rem;
  padding: 0 0.55rem;
  font-family: var(--font);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--qs-heading);
  background: var(--qs-surface);
  border: 1px solid var(--qs-border);
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.diagram-btn:hover {
  background: var(--qs-primary-muted);
  border-color: var(--qs-primary);
  color: var(--qs-primary-dark);
}
.diagram-btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
.diagram-btn--active {
  background: var(--qs-primary-muted);
  border-color: var(--qs-primary);
  color: var(--qs-primary-dark);
}
.diagram-btn--lock {
  font-size: 1rem;
  line-height: 1;
}

.diagram-zoom-level {
  min-width: 3.25rem;
  text-align: center;
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--qs-muted);
  font-variant-numeric: tabular-nums;
}

.diagram-stage {
  position: relative;
  min-height: var(--diagram-min-height);
  max-height: 88vh;
  overflow: hidden;
  background:
    linear-gradient(var(--diagram-grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--diagram-grid-color) 1px, transparent 1px);
  background-size: 24px 24px;
  background-color: var(--diagram-canvas-bg);
  cursor: grab;
  touch-action: none;
  outline: none;
}
.diagram-stage:focus-visible {
  box-shadow: inset var(--focus-ring);
}
.diagram-stage--dragging { cursor: grabbing; }
.diagram-stage--locked {
  cursor: default;
  touch-action: auto;
}
.diagram-viewer--locked .diagram-hint {
  color: var(--qs-primary-dark);
}
.diagram-stage--pulse { animation: diagram-pulse 0.25s ease; }

@keyframes diagram-pulse {
  0% { background-color: var(--diagram-canvas-bg); }
  50% { background-color: color-mix(in srgb, var(--diagram-canvas-bg) 88%, var(--sph-100)); }
  100% { background-color: var(--diagram-canvas-bg); }
}

.diagram-canvas {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: var(--diagram-min-height);
  padding: 1.5rem;
  transform-origin: center center;
  will-change: transform;
}

.diagram-canvas .mermaid,
.diagram-canvas .mermaid-rendered {
  margin: 0;
  padding: 0;
  border: none;
  background: transparent;
  overflow: visible;
  text-align: center;
}

.diagram-canvas svg {
  display: block;
  max-width: none !important;
  width: auto !important;
  height: auto !important;
  background: transparent !important;
}

.diagram-canvas svg > g > rect.background,
.diagram-canvas svg rect.background {
  fill: transparent !important;
}

.diagram-canvas svg .cluster rect {
  fill: var(--diagram-cluster-bg) !important;
}

.diagram-canvas svg .node:not(.gap):not(.sol):not(.people):not(.meta):not(.qs):not(.sph):not(.p2) rect,
.diagram-canvas svg .actor {
  fill: var(--diagram-node-bg) !important;
}

/* Preserve Mermaid classDef styling — global theme must not override these */
.diagram-canvas svg .node.gap rect {
  fill: #FEF2F2 !important;
  stroke: #DC2626 !important;
  stroke-width: 2px !important;
}
.diagram-canvas svg .node.sol rect,
.diagram-canvas svg .node.people rect,
.diagram-canvas svg .node.qs rect,
.diagram-canvas svg .node.p2 rect {
  fill: #E8F2FA !important;
  stroke: #0057A8 !important;
  stroke-width: 2px !important;
}
.diagram-canvas svg .node.meta rect {
  fill: #D1FAE5 !important;
  stroke: #128C7E !important;
  stroke-width: 2px !important;
}
.diagram-canvas svg .node.sph rect {
  fill: #003D73 !important;
  stroke: #071525 !important;
  stroke-width: 2px !important;
}
.diagram-canvas svg .node.p2 rect {
  stroke-dasharray: 4 3 !important;
}

.diagram-canvas svg .node.gap foreignObject div,
.diagram-canvas svg .node.gap foreignObject span,
.diagram-canvas svg .node.gap foreignObject p {
  color: #7F1D1D !important;
}
.diagram-canvas svg .node.sol foreignObject div,
.diagram-canvas svg .node.sol foreignObject span,
.diagram-canvas svg .node.sol foreignObject p,
.diagram-canvas svg .node.people foreignObject div,
.diagram-canvas svg .node.people foreignObject span,
.diagram-canvas svg .node.people foreignObject p,
.diagram-canvas svg .node.qs foreignObject div,
.diagram-canvas svg .node.qs foreignObject span,
.diagram-canvas svg .node.qs foreignObject p {
  color: #071525 !important;
}
.diagram-canvas svg .node.meta foreignObject div,
.diagram-canvas svg .node.meta foreignObject span,
.diagram-canvas svg .node.meta foreignObject p {
  color: #071525 !important;
}
.diagram-canvas svg .node.sph foreignObject div,
.diagram-canvas svg .node.sph foreignObject span,
.diagram-canvas svg .node.sph foreignObject p {
  color: #ffffff !important;
}
.diagram-canvas svg .node.p2 foreignObject div,
.diagram-canvas svg .node.p2 foreignObject span,
.diagram-canvas svg .node.p2 foreignObject p {
  color: #003D73 !important;
}

.diagram-canvas svg .edgeLabel rect,
.diagram-canvas svg .label rect {
  fill: var(--diagram-canvas-bg) !important;
  stroke: none !important;
  opacity: 1 !important;
}

.diagram-canvas svg .edgeLabel text,
.diagram-canvas svg .cluster-label text,
.diagram-canvas svg .messageText,
.diagram-canvas svg .loopText {
  paint-order: stroke fill;
  stroke: var(--diagram-canvas-bg);
  stroke-width: 5px;
  stroke-linejoin: round;
}

.diagram-canvas svg g.label foreignObject {
  overflow: visible !important;
}

.diagram-canvas svg foreignObject div,
.diagram-canvas svg foreignObject span,
.diagram-canvas svg foreignObject p {
  font-family: Inter, "Segoe UI", system-ui, sans-serif !important;
  font-size: 20px !important;
  font-weight: 500 !important;
  line-height: 1.35 !important;
  background: transparent !important;
  color: var(--diagram-text) !important;
  text-align: center !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  width: 100% !important;
  height: 100% !important;
  box-sizing: border-box !important;
  padding: 6px 10px !important;
  margin: 0 !important;
  text-shadow: none !important;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.diagram-canvas svg g.cluster-label foreignObject div,
.diagram-canvas svg g.cluster-label foreignObject span,
.diagram-canvas svg g.cluster-label foreignObject p {
  display: inline-flex !important;
  width: auto !important;
  height: auto !important;
  padding: 6px 12px !important;
  background: var(--diagram-cluster-bg) !important;
  border-radius: 4px;
  text-shadow: none !important;
  white-space: nowrap !important;
}

.diagram-canvas svg text,
.diagram-canvas svg tspan,
.diagram-canvas svg .nodeLabel,
.diagram-canvas svg .edgeLabel,
.diagram-canvas svg .cluster-label {
  font-family: Inter, "Segoe UI", system-ui, sans-serif !important;
  font-size: 20px !important;
  line-height: 1.35 !important;
  background: transparent !important;
  text-anchor: middle !important;
  dominant-baseline: middle !important;
  fill: var(--diagram-text) !important;
  color: var(--diagram-text) !important;
}

.diagram-canvas svg .section0,
.diagram-canvas svg .section1,
.diagram-canvas svg .section2,
.diagram-canvas svg .section3,
.diagram-canvas svg .section4,
.diagram-canvas svg .section5 {
  fill: var(--diagram-cluster-bg) !important;
}

.diagram-canvas svg .taskWrapper text,
.diagram-canvas svg .eventWrapper text,
.diagram-canvas svg .timeline-node text {
  paint-order: stroke fill;
  stroke: var(--diagram-canvas-bg);
  stroke-width: 6px;
  stroke-linejoin: round;
}

.diagram-canvas svg .taskWrapper .node-bkg,
.diagram-canvas svg .eventWrapper .node-bkg {
  fill: var(--diagram-node-bg) !important;
  opacity: 1 !important;
}

.diagram-canvas svg .titleText,
.diagram-canvas svg .titleText text,
.diagram-canvas svg .titleText tspan,
.diagram-canvas svg .timelineTitle,
.diagram-canvas svg .timelineTitle text,
.diagram-canvas svg .timelineTitle tspan {
  font-size: 28px !important;
  font-weight: 700 !important;
  fill: var(--diagram-title-color) !important;
  color: var(--diagram-title-color) !important;
}

.diagram-canvas svg .sectionTitle,
.diagram-canvas svg .sectionTitle text,
.diagram-canvas svg .sectionTitle tspan,
.diagram-canvas svg .taskText,
.diagram-canvas svg .taskText text,
.diagram-canvas svg .taskText tspan {
  font-size: 23px !important;
  font-weight: 700 !important;
}

.diagram-hint {
  margin: 0;
  padding: 0.45rem 0.85rem;
  font-size: var(--text-xs);
  color: var(--qs-muted);
  text-align: center;
  background: var(--qs-bg);
  border-top: 1px solid var(--qs-border);
}

/* Fullscreen diagram modal */
body.diagram-modal-open { overflow: hidden; }

.diagram-modal {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: rgba(15, 23, 42, 0.72);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  backdrop-filter: blur(4px);
}

.diagram-modal-inner {
  position: relative;
  width: min(96vw, 1400px);
  height: min(92vh, 900px);
}

.diagram-modal-close {
  position: absolute;
  top: -0.25rem;
  right: -0.25rem;
  z-index: 2;
  width: 2.5rem;
  height: 2.5rem;
  border: none;
  border-radius: 50%;
  background: var(--qs-surface);
  color: var(--qs-heading);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  box-shadow: var(--qs-shadow);
}
.diagram-modal-close:hover { background: var(--qs-primary-light); }

.diagram-viewer--modal {
  margin: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.diagram-viewer--modal .diagram-stage {
  flex: 1;
  max-height: none;
  min-height: 0;
}

.search-highlight {
  background: #fef08a;
  color: #0f172a;
  padding: 0 2px;
  border-radius: 2px;
}

.page-footer {
  position: fixed;
  bottom: 0;
  left: var(--sidebar-width);
  right: 0;
  z-index: 120;
  margin-top: 0;
  padding: 0.85rem 2rem 1rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--qs-muted);
  border-top: 1px solid var(--qs-border);
  background: var(--qs-surface);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: var(--footer-height);
  box-shadow: 0 -1px 3px rgba(0, 0, 0, 0.04);
}

body.sidebar-collapsed .page-footer {
  left: 0;
}

.page-footer-logo {
  flex-shrink: 0;
  background: transparent;
}

.page-footer-logo img,
.page-footer-logo svg {
  height: 32px;
  width: auto;
  display: block;
}

.page-footer-text p {
  margin: 0.1rem 0;
  line-height: 1.45;
}

.scroll-nav {
  position: fixed;
  /* Keep clear of the fixed footer and support launcher. */
  bottom: calc(var(--footer-height, 118px) + 5.5rem);
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 130;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, visibility 0.2s;
}
.scroll-nav.visible { opacity: 1; visibility: visible; }

.scroll-nav-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--qs-primary);
  color: #fff;
  border: none;
  cursor: pointer;
  box-shadow: var(--qs-shadow);
  font-size: 1.2rem;
  line-height: 1;
  transition: background 0.2s, opacity 0.2s;
}
.scroll-nav-btn:hover:not(:disabled) { background: var(--qs-primary-dark); }
.scroll-nav-btn:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.scroll-nav-btn:disabled {
  opacity: 0.35;
  cursor: default;
}

/* Hide duplicate markdown cover elements when hero is present */
.prose > h1.cover-hidden,
.prose > h2.cover-hidden,
.prose > table.cover-hidden,
.prose > hr.cover-hidden { display: none; }

/* Implementation timeline (replaces Mermaid Gantt for readability) */
.impl-timeline {
  margin: 1.5rem 0 2rem;
  padding: 1.25rem 1.5rem 1rem;
  background: var(--qs-surface);
  border: 1px solid var(--qs-border);
  border-radius: var(--qs-radius-lg);
  box-shadow: var(--qs-shadow-sm);
}

.impl-timeline__title {
  margin: 0 0 1rem;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--sph-700);
  text-align: center;
}

.impl-timeline__scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 0.25rem;
}

.impl-timeline__chart {
  min-width: 880px;
}

.impl-timeline__axis {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--sph-500);
}

.impl-timeline__months {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 0;
}

.impl-timeline__months span {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--sph-700);
  text-align: center;
  padding: 0.25rem 0;
  border-left: 1px solid var(--sph-100);
}

.impl-timeline__months span:first-child {
  border-left: none;
}

.impl-timeline__phase {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 0.75rem;
  align-items: stretch;
  margin-top: 0.65rem;
}

.impl-timeline__phase-label {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 0.35rem 0.5rem;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--sph-700);
  text-align: right;
  line-height: 1.25;
  border-right: 3px solid var(--sph-500);
}

.impl-timeline__phase[data-phase="discovery"] .impl-timeline__phase-label { border-right-color: #0057A8; }
.impl-timeline__phase[data-phase="foundation"] .impl-timeline__phase-label { border-right-color: #1A6BB5; }
.impl-timeline__phase[data-phase="core"] .impl-timeline__phase-label { border-right-color: #2B7FC2; }
.impl-timeline__phase[data-phase="extended"] .impl-timeline__phase-label { border-right-color: #3C93CF; }
.impl-timeline__phase[data-phase="phase2"] .impl-timeline__phase-label { border-right-color: #5AA8D8; }
.impl-timeline__phase[data-phase="golive"] .impl-timeline__phase-label { border-right-color: #128C7E; }

.impl-timeline__track {
  position: relative;
  padding: 0.35rem 0;
  background-image: repeating-linear-gradient(
    to right,
    transparent,
    transparent calc(12.5% - 1px),
    var(--sph-100) calc(12.5% - 1px),
    var(--sph-100) 12.5%
  );
  border-radius: 4px;
}

.impl-timeline__lane {
  position: relative;
  height: 2.125rem;
  margin: 0.2rem 0;
}

.impl-timeline__bar {
  position: absolute;
  top: 0;
  height: 100%;
  min-width: 2px;
  display: flex;
  align-items: center;
  padding: 0 0.5rem;
  background: var(--sph-100);
  border: 2px solid var(--sph-500);
  border-radius: 5px;
  box-sizing: border-box;
  overflow: hidden;
}

.impl-timeline__bar span {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--sph-900);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.impl-timeline__bar--test {
  background: #E8F5F3;
  border-color: #128C7E;
}

.impl-timeline__bar--milestone {
  background: #128C7E;
  border-color: #0D6B60;
  min-width: 4.5rem;
  z-index: 1;
}

.impl-timeline__bar--milestone span {
  color: #fff;
  font-weight: 700;
}

.impl-timeline__bar--hypercare {
  background: repeating-linear-gradient(
    -45deg,
    var(--sph-50),
    var(--sph-50) 6px,
    var(--sph-100) 6px,
    var(--sph-100) 12px
  );
  border-style: dashed;
}

.impl-timeline__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  justify-content: center;
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--qs-border);
}

.impl-timeline__legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--qs-muted);
}

.impl-timeline__legend-item::before {
  content: "";
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 2px;
  background: var(--sph-100);
  border: 2px solid var(--sph-500);
}

.impl-timeline__legend-item[data-phase="discovery"]::before { border-color: #0057A8; }
.impl-timeline__legend-item[data-phase="foundation"]::before { border-color: #1A6BB5; }
.impl-timeline__legend-item[data-phase="core"]::before { border-color: #2B7FC2; }
.impl-timeline__legend-item[data-phase="extended"]::before { border-color: #3C93CF; }
.impl-timeline__legend-item[data-phase="phase2"]::before { border-color: #5AA8D8; }
.impl-timeline__legend-item[data-phase="golive"]::before { border-color: #128C7E; }
.impl-timeline__legend-item--test::before { background: #E8F5F3; border-color: #128C7E; }
.impl-timeline__legend-item--milestone::before { background: #128C7E; border-color: #0D6B60; }

@media (max-width: 960px) {
  .impl-timeline { padding: 1rem; margin-left: 0; margin-right: 0; }
  .impl-timeline__chart { min-width: 720px; }
}

@media print {
  .impl-timeline { break-inside: avoid; box-shadow: none; }
  .impl-timeline__scroll { overflow: visible; }
  .impl-timeline__chart { min-width: 0; }
}

/* Tablet / narrow desktop */
@media (max-width: 1100px) {
  .topbar-sph-logo { height: 36px; }
  .topbar-brand { gap: 0.5rem; }
  .topbar-brand-sep { height: 28px; }
  .logo-link img { height: 30px; }
  .review-toolbar-btn.btn-icon {
    padding: 0.5rem;
    min-width: 40px;
  }

  .topbar-nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-left: 0.15rem;
  }

  .topbar-nav {
    display: none;
    position: fixed;
    top: var(--topbar-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    flex-wrap: nowrap;
    gap: 0.25rem;
    padding: 0.75rem;
    background: var(--qs-surface);
    border-bottom: 1px solid var(--qs-border);
    box-shadow: var(--qs-shadow);
    max-height: calc(100vh - var(--topbar-height));
    overflow-y: auto;
    z-index: 199;
  }

  .topbar-nav.is-open { display: flex; }

  .topbar-nav .btn {
    width: 100%;
    justify-content: flex-start;
    padding: 0.65rem 0.75rem;
    font-size: 0.875rem;
    white-space: normal;
  }

  .topbar-doc-menu__items {
    position: static;
    min-width: 0;
    margin-top: 0.15rem;
    padding: 0.15rem 0 0.15rem 0.75rem;
    border: none;
    border-radius: 0;
    box-shadow: none;
    background: transparent;
  }

  .topbar-end-prototype { display: none !important; }

  .topbar-nav-prototype {
    margin-top: 0.35rem;
    padding-top: 0.65rem;
    border-top: 1px solid var(--qs-border);
  }
}

@media (min-width: 1101px) {
  .topbar-nav-prototype { display: none !important; }
  .topbar-nav-toggle { display: none !important; }
}

@media (max-width: 480px) {
  .topbar-sph-logo { height: 30px; }
  .topbar {
    padding: 0 0.5rem 0 0.35rem;
    gap: 0.35rem;
  }
  .topbar-end .btn-icon {
    min-width: 36px;
    padding: 0.4rem;
  }
}

@media (max-width: 960px) {
  .topbar {
    padding: 0 0.75rem 0 0.5rem;
    gap: 0.5rem;
  }
  .topbar-left { gap: 0.5rem; }
  .topbar-end {
    gap: 0.35rem;
  }
  .sidebar-collapse { display: none; }
  .menu-toggle { display: inline-flex; }
  .doc-badge { display: none; }
  .sidebar {
    transform: translateX(-100%);
    box-shadow: var(--qs-shadow);
  }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .page-footer { left: 0; }
  .content-wrap { padding: 1.25rem 1rem 3rem; }
  .hero-cover { padding: 1.5rem; }
  .hero-cover h1 { font-size: 1.4rem; }
  .diagram-viewer { margin-left: 0; margin-right: 0; }
  .diagram-stage {
    min-height: 360px;
    max-height: 60vh;
  }
  .diagram-canvas { min-height: 360px; padding: 1rem; }
  .ui-embed-frame { height: 640px; }
}

@media print {
  .topbar, .sidebar, .scroll-nav, .menu-toggle, .topbar-nav-toggle, .topbar-nav-backdrop, .skip-link,
  .diagram-toolbar, .diagram-hint, .diagram-modal { display: none !important; }
  .main-content { margin-left: 0; padding-bottom: 0; }
  .page-footer {
    position: static;
    left: auto;
    right: auto;
    box-shadow: none;
    margin-top: 3rem;
    min-height: 0;
  }
  .hero-cover { break-after: page; }
  .prose h1, .prose h2 { break-after: avoid; }
  .diagram-viewer { break-inside: avoid; margin: 1rem 0; }
  .diagram-stage {
    max-height: none;
    min-height: auto;
    overflow: visible;
    background: #fff;
  }
  .diagram-canvas { transform: none !important; padding: 0.5rem; }
}