/* BackOfHouseOS Demo Studio — animated proof surface.
   One restrained operating environment. Typography and pacing carry the work;
   the loop spine carries the system intelligence. */

:root {
  color-scheme: dark;

  --bg: #07090a;
  --bg-2: #0c1011;
  --paper: #f0eadc;
  --ink: #e6dfd0;
  --muted: rgba(230, 223, 208, 0.6);
  --dim: rgba(230, 223, 208, 0.36);
  --line: rgba(230, 223, 208, 0.1);
  --line-strong: rgba(230, 223, 208, 0.22);

  --green: #a4bda6;
  --gold: #b89a64;

  --accent: var(--green);
  --accent-glow: rgba(164, 189, 166, 0.22);

  --font-display: "Druk Wide", "Druk", "Helvetica Neue Condensed", HelveticaNeue-CondensedBold, "Arial Narrow", Impact, sans-serif;
  --font-ui: Inter, "Helvetica Neue", Helvetica, Arial, ui-sans-serif, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", "IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace;
  --font: var(--font-ui);

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --loop-progress: 0%;
}

/* Per-active-module accents on body */
body[data-active-module="revenuedeskos"] { --accent: #82a98c; --accent-glow: rgba(130, 169, 140, 0.22); }
body[data-active-module="revenuedesk"]   { --accent: #d2b36f; --accent-glow: rgba(210, 179, 111, 0.2); }
body[data-active-module="archiveos"]     { --accent: #94a39a; --accent-glow: rgba(148, 163, 154, 0.22); }
body[data-active-module="churchos"]      { --accent: #c4b387; --accent-glow: rgba(196, 179, 135, 0.22); }
body[data-active-module="inventoryos"]   { --accent: #a8b1a8; --accent-glow: rgba(168, 177, 168, 0.22); }
body[data-active-module="runneros"]      { --accent: #92a9a4; --accent-glow: rgba(146, 169, 164, 0.22); }
body[data-active-module="cookbookos"]    { --accent: #b89c75; --accent-glow: rgba(184, 156, 117, 0.22); }
body[data-active-module="manillaos"]     { --accent: #b89a64; --accent-glow: rgba(184, 154, 100, 0.22); }
body[data-active-module="canonos"]       { --accent: #c0b9a3; --accent-glow: rgba(192, 185, 163, 0.22); }
body[data-active-module="jobradaros"]    { --accent: #b6a986; --accent-glow: rgba(182, 169, 134, 0.22); }
body[data-active-module="mediaos"]       { --accent: #9eafb6; --accent-glow: rgba(158, 175, 182, 0.22); }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.55;
  letter-spacing: 0;
  font-synthesis: none;
  font-feature-settings: "kern" 1, "ss01" 1, "cv11" 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }

.studio-shell {
  width: min(1080px, calc(100% - 48px));
  margin: 0 auto;
}

/* -------------------- Header -------------------- */
.studio-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  min-height: 56px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 9, 10, 0.86);
  backdrop-filter: blur(20px);
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
}

.brand-mark {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border: 1px solid var(--line);
  background: transparent;
}

.brand-mark img {
  display: block;
  width: 18px;
  height: 18px;
  object-fit: contain;
  opacity: 0.92;
}

.brand-lockup strong,
.brand-lockup small { display: block; }

.brand-lockup strong {
  color: var(--paper);
  font-family: var(--font-display);
  font-size: 0.94rem;
  font-weight: 500;
  letter-spacing: 0.005em;
}

.brand-lockup small {
  color: var(--dim);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}

.studio-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 2px;
}

.studio-nav a {
  display: inline-flex;
  min-height: 36px;
  align-items: center;
  padding: 6px 10px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  transition: color 220ms var(--ease);
}

.studio-nav a:hover,
.studio-nav a:focus-visible {
  color: var(--paper);
  outline: none;
}

main { padding: 76px 0 56px; }

/* -------------------- Typography -------------------- */
h1, h2, h3, p { margin-top: 0; }

h1 {
  max-width: 20ch;
  margin-bottom: 22px;
  color: var(--paper);
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6.8vw, 5.2rem);
  font-weight: 600;
  line-height: 0.98;
  letter-spacing: -0.022em;
  text-transform: none;
}

h2 {
  max-width: 32ch;
  margin-bottom: 14px;
  color: var(--paper);
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.8vw, 2.2rem);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.02em;
}

h3 {
  margin-bottom: 6px;
  color: var(--paper);
  font-size: 0.96rem;
  font-weight: 500;
}

.system-line,
.eyebrow {
  margin: 0 0 22px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  text-transform: none;
}

.hero-section {
  display: flex;
  flex-direction: column;
  padding: 8px 0 28px;
}

.hero-copy {
  max-width: 58ch;
  margin: 0;
  color: var(--muted);
  font-size: clamp(0.98rem, 1.4vw, 1.1rem);
  line-height: 1.6;
}

.hero-actions,
.preview-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: 36px;
}

/* -------------------- Text actions -------------------- */
.text-action,
.held-state {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 4px 0;
  border: 0;
  background: transparent;
  color: var(--paper);
  font-size: 0.92rem;
  font-weight: 500;
}

.text-action { cursor: pointer; }

.text-action::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 1px;
  background: currentColor;
  opacity: 0.32;
  transform: scaleX(0.18);
  transform-origin: left center;
  transition: transform 220ms var(--ease), opacity 220ms var(--ease);
}

.text-action:hover::after,
.text-action:focus-visible::after { opacity: 1; transform: scaleX(1); }

.text-action:focus-visible,
.module-entry:focus-visible {
  outline: 1px solid var(--line-strong);
  outline-offset: 6px;
}

.text-action.primary { color: var(--accent); }
.text-action.primary::after { opacity: 0.6; transform: scaleX(1); background: var(--accent); }

.held-state { color: var(--dim); cursor: not-allowed; }

/* -------------------- Operating loop spine -------------------- */
.loop-spine {
  position: relative;
  margin: 24px 0 38px;
  padding: 18px 0 16px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.loop-stations {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 0;
  list-style: none;
  padding: 0;
  margin: 0;
  position: relative;
  z-index: 2;
}

.loop-stations li {
  display: grid;
  align-content: end;
  justify-items: center;
  gap: 2px;
  padding: 0 6px;
  text-align: center;
  position: relative;
}

.loop-stations li::before {
  content: "";
  display: block;
  width: 7px;
  height: 7px;
  margin-bottom: 8px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--bg);
  transition: background 360ms var(--ease), border-color 360ms var(--ease), box-shadow 360ms var(--ease), transform 360ms var(--ease);
}

.loop-stations li.is-lit::before {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
  transform: scale(1.02);
}

.loop-stations li.is-current::before {
  box-shadow: 0 0 0 3px var(--accent-glow), 0 0 14px rgba(240, 234, 220, 0.08);
}

.loop-num {
  color: var(--dim);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1.1;
  transition: color 360ms var(--ease);
}

.loop-stations li.is-lit .loop-num { color: var(--accent); }

.loop-name {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  line-height: 1.2;
  transition: color 360ms var(--ease);
}

.loop-stations li.is-lit .loop-name { color: var(--paper); }
.loop-stations li.is-current .loop-num,
.loop-stations li.is-current .loop-name { color: var(--accent); }

.loop-rail {
  position: absolute;
  top: 21px;
  left: calc(100% / 14);
  right: calc(100% / 14);
  height: 1px;
  margin: 0;
  background: var(--line-strong);
  pointer-events: none;
  z-index: 1;
}

.loop-rail-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 1px;
  width: var(--loop-progress, 0%);
  background: var(--accent);
  transition: width 360ms var(--ease), background 360ms var(--ease);
}

.loop-head {
  position: absolute;
  top: 50%;
  left: var(--loop-progress, 0%);
  transform: translate(-50%, -50%) scale(0.96);
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
  transition: left 360ms var(--ease), transform 360ms var(--ease), background 360ms var(--ease), box-shadow 360ms var(--ease);
  opacity: 0.92;
}

.loop-spine.is-complete .loop-head {
  transform: translate(-50%, -50%) scale(1.06);
}

/* -------------------- Modules section -------------------- */
/* -------------------- Honesty notice + what + featured -------------------- */
.notice {
  margin: 28px 0 0;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--gold);
  background: rgba(184, 154, 100, 0.04);
}

.notice p {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.55;
}

.notice strong {
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  margin-right: 8px;
  text-transform: uppercase;
}

.what-section {
  padding: 56px 0 4px;
}

.what-section h2 { margin-bottom: 10px; }

.what-section p {
  max-width: 64ch;
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.6;
}

.featured-section {
  padding: 64px 0 16px;
}

.featured-list {
  display: grid;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.featured-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  gap: 22px;
  align-items: baseline;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.featured-rank {
  color: var(--dim);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.featured-item h3 {
  margin: 0 0 6px;
  color: var(--paper);
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.2vw, 1.7rem);
  font-weight: 500;
  letter-spacing: -0.012em;
}

.featured-item h3 a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 220ms var(--ease), color 220ms var(--ease);
}

.featured-item h3 a:hover,
.featured-item h3 a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
  outline: none;
}

.featured-item p {
  max-width: 64ch;
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.55;
}

.featured-status {
  align-self: start;
  margin-top: 4px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

/* -------------------- Module groups -------------------- */
.module-group + .module-group {
  margin-top: 32px;
}

.group-label {
  margin: 0 0 6px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: none;
}

.module-group[data-group="held"] .module-entry {
  cursor: pointer;
  opacity: 0.78;
}

.module-group[data-group="held"] .module-entry:hover,
.module-group[data-group="held"] .module-entry.is-active {
  opacity: 1;
}

.modules-section {
  padding-top: 36px;
}

.section-heading {
  max-width: 56ch;
  margin: 0 0 28px;
}

.section-heading h2 { margin-bottom: 10px; }

.section-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.modules-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.5fr);
  gap: 56px;
  align-items: start;
}

/* Module list — varied rhythm, no boxed grid */
.module-list {
  display: grid;
  border-top: 1px solid var(--line);
}

.module-entry {
  display: grid;
  grid-template-columns: 28px 64px minmax(160px, 0.7fr) minmax(0, 1.3fr);
  gap: 22px;
  align-items: baseline;
  min-height: 84px;
  padding: 22px 0;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  transition: background 280ms var(--ease), border-color 280ms var(--ease);
}

.module-entry:hover {
  background: rgba(230, 223, 208, 0.018);
}

.module-entry.is-active {
  border-bottom-color: var(--line-strong);
}

.module-entry.is-active .module-title { color: var(--accent); }
.module-entry:hover .module-purpose { color: var(--ink); }

.module-rank {
  color: var(--dim);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.module-status,
.preview-status {
  color: var(--dim);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: none;
}

.status-live .module-status,
.preview-status.status-live      { color: var(--accent); }
.status-case-study .module-status,
.preview-status.status-case-study { color: var(--gold); }
.status-snapshot .module-status,
.preview-status.status-snapshot  { color: var(--gold); }
.status-concept .module-status,
.preview-status.status-concept   { color: var(--gold); }
.status-held .module-status,
.preview-status.status-held      { color: var(--dim); }
.status-standby .module-status,
.status-archive .module-status,
.preview-status.status-standby,
.preview-status.status-archive   { color: var(--dim); }
.status-review .module-status,
.status-sealed .module-status,
.preview-status.status-review,
.preview-status.status-sealed    { color: var(--gold); }

.module-title {
  color: var(--paper);
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.3vw, 1.95rem);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.012em;
  transition: color 280ms var(--ease);
}

.module-purpose {
  max-width: 44ch;
  color: var(--muted);
  font-size: 0.94rem;
  transition: color 280ms var(--ease);
}

.module-category {
  display: block;
  margin-bottom: 4px;
  color: var(--dim);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
}

.module-implementation {
  display: flex;
  flex-wrap: wrap;
  grid-column: 4 / -1;
  gap: 4px 14px;
  margin-top: -12px;
  color: var(--dim);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0;
}

/* -------------------- Preview panel -------------------- */
.preview-panel {
  position: relative;
  min-width: 0;
}

.preview-sticky {
  position: sticky;
  top: 80px;
  padding: 0;
  border: 0;
  background: transparent;
}

.preview-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 28px;
}

.preview-head h2 {
  margin: 0 0 4px;
  font-size: clamp(1.35rem, 2.1vw, 1.85rem);
  letter-spacing: -0.015em;
}

#preview-subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.preview-status {
  display: inline-flex;
  align-items: center;
  padding-top: 8px;
  white-space: nowrap;
}

.implementation-mini {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 18px;
  margin: -8px 0 24px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.implementation-mini > div {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 5px 0;
}

.implementation-mini dt {
  margin: 0;
  color: var(--dim);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0;
}

.implementation-mini dd {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.35;
}

/* Evidence trail */
.evidence-trail {
  display: grid;
  gap: 0;
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--line);
}

.evidence-trail li {
  display: grid;
  grid-template-columns: 36px minmax(86px, auto) minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  opacity: 0.32;
  transform: translateY(2px);
  transition: opacity 360ms var(--ease), transform 360ms var(--ease);
}

.evidence-trail li.is-lit {
  opacity: 1;
  transform: translateY(0);
}

.evidence-trail .trail-num {
  color: var(--dim);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.evidence-trail li.is-lit .trail-num { color: var(--accent); }

.evidence-trail strong {
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.86rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.evidence-trail em {
  color: var(--muted);
  font-family: var(--font-ui);
  font-style: normal;
  font-size: 0.94rem;
  line-height: 1.55;
}

.evidence-trail li[data-stage="6"].is-lit strong {
  color: var(--accent);
}

/* Governance mini under trail */
.governance-mini {
  display: grid;
  gap: 0;
  margin: 28px 0 0;
}

.governance-mini > div {
  display: grid;
  grid-template-columns: 100px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.governance-mini > div:last-child { border-bottom: 0; }

.governance-mini dt {
  margin: 0;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.governance-mini dd {
  margin: 0;
  color: var(--ink);
  font-size: 0.92rem;
}

/* -------------------- Governance section -------------------- */
.governance-section {
  padding: 80px 0 24px;
  border-top: 1px solid var(--line);
}

.governance-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 28px minmax(0, 1fr) 28px minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  margin: 28px 0 24px;
  max-width: 720px;
}

.gov-step {
  display: grid;
  align-content: start;
  gap: 4px;
  padding: 18px 0;
  border-top: 1px solid var(--line-strong);
}

.gov-step .gov-num {
  color: var(--dim);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.gov-step strong {
  color: var(--paper);
  font-family: var(--font-display);
  font-size: 1.18rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.gov-step em {
  color: var(--muted);
  font-style: normal;
  font-size: 0.88rem;
}

.gov-step.is-canon { border-top-color: var(--accent); }
.gov-step.is-canon strong { color: var(--accent); }

.gov-arrow {
  display: block;
  width: 100%;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--line-strong), transparent);
}

.governance-copy {
  max-width: 64ch;
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

/* -------------------- Boundary + footer -------------------- */
.boundary-section {
  margin-top: 40px;
  padding: 24px 0 0;
  border-top: 1px solid var(--line);
}

.boundary-section p {
  max-width: 60ch;
  margin: 0;
  color: var(--muted);
  font-size: 0.96rem;
}

.studio-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 22px;
  margin: 64px 0 24px;
  padding: 16px 0 0;
  border-top: 1px solid var(--line);
}

.studio-footer span {
  color: var(--dim);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 400;
  letter-spacing: 0.02em;
}

/* -------------------- Motion: settle on enter -------------------- */
.hero-section,
.loop-spine,
.modules-section,
.governance-section,
.boundary-section {
  animation: settle 420ms var(--ease) both;
}

.loop-spine        { animation-delay: 80ms; }
.modules-section   { animation-delay: 140ms; }
.governance-section{ animation-delay: 200ms; }
.boundary-section  { animation-delay: 260ms; }

@keyframes settle {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .evidence-trail li { opacity: 1; transform: none; }
}

/* -------------------- Responsive -------------------- */
@media (max-width: 960px) {
  .modules-layout {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .preview-sticky { position: static; }

  .module-entry {
    grid-template-columns: 28px 56px 1fr;
    gap: 16px;
  }

  .module-entry .module-purpose {
    grid-column: 2 / -1;
    max-width: none;
  }

  .module-entry .module-implementation {
    grid-column: 2 / -1;
    margin-top: -6px;
  }
}

@media (max-width: 720px) {
  .studio-shell { width: min(100% - 28px, 1080px); }
  main { padding: 36px 0 36px; }

  .studio-header {
    position: static;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 14px 0;
    min-height: auto;
  }

  .studio-nav { justify-content: flex-start; width: 100%; }

  .hero-section { padding: 6px 0 14px; }

  .loop-spine {
    margin: 24px 0 36px;
    padding: 8px 0 0;
    border-top: 0;
    border-bottom: 0;
  }

  /* Vertical loop on mobile — compact inspection rail */
  .loop-stations {
    grid-template-columns: 1fr;
    gap: 9px;
    position: relative;
    padding-left: 0;
  }

  .loop-stations li {
    display: grid;
    grid-template-columns: 24px minmax(0, 1fr);
    gap: 1px 12px;
    align-items: center;
    justify-items: stretch;
    text-align: left;
  }

  .loop-stations li::before {
    grid-column: 1;
    grid-row: 1 / span 2;
    align-self: center;
    width: 8px;
    height: 8px;
    margin: 0;
    justify-self: center;
  }

  .loop-stations .loop-num,
  .loop-stations .loop-name {
    text-align: left;
  }

  .loop-stations .loop-num {
    grid-column: 2;
    margin: 0;
  }

  .loop-stations .loop-name {
    grid-column: 2;
    font-size: 0.88rem;
  }

  /* Rail becomes vertical */
  .loop-rail {
    top: 0;
    bottom: 0;
    left: 11px;
    right: auto;
    width: 1px;
    height: auto;
    background: var(--line-strong);
  }

  .loop-rail-fill {
    width: 1px;
    height: var(--loop-progress, 0%);
  }

  .loop-head {
    top: var(--loop-progress, 0%);
    left: 0;
    transform: translate(-50%, -50%) scale(0.96);
  }

  .modules-section { padding-top: 12px; }
  .section-heading { margin-bottom: 18px; }

  .module-entry {
    grid-template-columns: 24px auto 1fr;
    gap: 12px;
    min-height: auto;
    padding: 18px 0;
  }

  .module-entry .module-status {
    text-align: right;
  }

  .module-entry .module-title {
    grid-column: 1 / -1;
    margin-top: 4px;
    font-size: 1.2rem;
  }

  .module-entry .module-purpose {
    grid-column: 1 / -1;
    margin: 0;
    font-size: 0.9rem;
  }

  .module-entry .module-implementation {
    grid-column: 1 / -1;
    margin-top: 0;
  }

  .module-entry .module-rank { font-size: 0.7rem; }

  .evidence-trail li {
    grid-template-columns: 30px 1fr;
    grid-auto-rows: auto;
    gap: 4px 10px;
    padding: 12px 0;
  }

  .evidence-trail strong { grid-column: 2; }
  .evidence-trail em     { grid-column: 1 / -1; padding-left: 40px; }

  .governance-mini > div {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .implementation-mini {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .implementation-mini > div {
    grid-template-columns: 86px minmax(0, 1fr);
  }

  .governance-section { padding-top: 48px; }

  .governance-flow {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .gov-arrow {
    height: 14px;
    width: 1px;
    margin: 0 auto;
    background: linear-gradient(to bottom, transparent, var(--line-strong), transparent);
  }

  .hero-actions,
  .preview-actions { gap: 18px; margin-top: 24px; }

  .notice { padding: 14px 14px; }
  .notice strong { display: block; margin: 0 0 4px; }

  .what-section { padding: 36px 0 0; }
  .featured-section { padding: 40px 0 8px; }

  .featured-item {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 4px 14px;
    padding: 18px 0;
  }
  .featured-item h3 { font-size: 1.2rem; }
  .featured-item p { font-size: 0.9rem; }
  .featured-status {
    grid-column: 1 / -1;
    margin-top: 6px;
    padding-left: 50px;
  }

  .module-group + .module-group { margin-top: 24px; }
}

@media (max-width: 420px) {
  h1 { font-size: clamp(1.75rem, 9vw, 2.4rem); }
  .notice p { font-size: 0.9rem; }
}

/* -------------------- Reading-mode overlay -------------------- */
.mode-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(7, 9, 10, 0.86);
  backdrop-filter: blur(8px);
  opacity: 0;
  transition: opacity 220ms var(--ease);
}

.mode-overlay[hidden] { display: none; }
.mode-overlay.is-open { opacity: 1; }

.mode-sheet {
  width: min(460px, 100%);
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  padding: 30px 28px 22px;
  border: 1px solid var(--line-strong);
  background: var(--bg);
  color: var(--ink);
  box-shadow: 0 32px 90px rgba(0, 0, 0, 0.4);
}

.mode-sheet .mode-eyebrow {
  margin: 0 0 12px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.mode-sheet h2 {
  max-width: none;
  margin: 0 0 8px;
  color: var(--paper);
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.2vw, 1.85rem);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.012em;
}

.mode-intro {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.mode-list {
  display: grid;
  gap: 8px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
}

.mode-choice {
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 14px;
  align-items: start;
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  transition: border-color 180ms var(--ease), background 180ms var(--ease);
}

.mode-choice:hover,
.mode-choice:focus-visible {
  border-color: var(--accent);
  background: rgba(159, 185, 163, 0.06);
  outline: none;
}

.mode-choice .mode-num {
  color: var(--dim);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding-top: 2px;
}

.mode-choice .mode-body {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.mode-choice strong {
  color: var(--paper);
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: -0.005em;
}

.mode-choice em {
  color: var(--muted);
  font-style: normal;
  font-size: 0.88rem;
  line-height: 1.45;
}

.mode-dismiss {
  display: inline-flex;
  align-items: center;
  padding: 6px 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  cursor: pointer;
}

.mode-dismiss:hover,
.mode-dismiss:focus-visible {
  color: var(--paper);
  outline: none;
}

.mode-switch {
  display: inline-flex;
  align-items: center;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--dim);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.02em;
  cursor: pointer;
}

.mode-switch:hover,
.mode-switch:focus-visible {
  color: var(--paper);
  outline: none;
}

.mode-switch .mode-switch-label {
  color: var(--accent);
  margin: 0 2px;
}

/* -------------------- Mode density rules (root gallery) -------------------- */

/* Quick tour (default) — light prune of explanatory sections */
body.mode-quick .what-section { display: none; }
body.mode-quick .modules-section .section-heading > p { display: none; }
body.mode-quick .module-entry .module-implementation { display: none; }
body.mode-quick .governance-mini { display: none; }

/* Show me stuff — aggressive prune of narrative */
body.mode-show .notice,
body.mode-show .what-section,
body.mode-show .loop-spine,
body.mode-show .featured-section .section-heading > p,
body.mode-show .featured-item > div > p,
body.mode-show .modules-section .section-heading > p,
body.mode-show .module-entry .module-purpose,
body.mode-show .module-entry .module-implementation,
body.mode-show .governance-mini,
body.mode-show .evidence-trail,
body.mode-show .boundary-section {
  display: none !important;
}

body.mode-show .hero-section { padding: 8px 0 4px; }
body.mode-show .hero-copy { display: none; }
body.mode-show #studio-title {
  font-size: clamp(1.5rem, 5vw, 2.4rem);
  margin-bottom: 14px;
}

/* Operator — explicitly enable everything (override quick defaults) */
body.mode-operator .what-section { display: block; }
body.mode-operator .modules-section .section-heading > p { display: block; }
body.mode-operator .module-entry .module-implementation { display: block; }
body.mode-operator .governance-mini { display: grid; }

/* -------------------- Mobile compression (<=720px) -------------------- */
@media (max-width: 720px) {
  /* Hero tightening */
  main { padding: 28px 0 28px; }
  .hero-section { padding: 4px 0 10px; }
  .hero-copy { font-size: 0.94rem; line-height: 1.55; }
  .hero-actions { margin-top: 18px; gap: 14px; }

  /* Notice slimmer */
  .notice { margin: 18px 0 0; padding: 12px 14px; }
  .notice p { font-size: 0.88rem; line-height: 1.5; }

  /* What-section slimmer (and hide by default per Quick mode) */
  .what-section { padding: 36px 0 0; }
  .what-section h2 { margin-bottom: 8px; }
  .what-section p { font-size: 0.94rem; }

  /* Featured-section heading paragraph collapses */
  .featured-section { padding: 40px 0 8px; }
  .featured-section .section-heading p { font-size: 0.9rem; }

  /* Module list — leaner cards on mobile */
  .modules-section { padding-top: 16px; }
  .modules-section .section-heading > p { font-size: 0.9rem; }
  .module-entry { padding: 14px 0; min-height: auto; }
  .module-entry .module-purpose { font-size: 0.88rem; }

  /* Loop spine breathing */
  .loop-spine { margin: 22px 0 32px; padding: 14px 0 4px; }

  /* Boundary footnote */
  .boundary-section { margin-top: 28px; padding-top: 18px; }
  .boundary-section p { font-size: 0.88rem; line-height: 1.55; }

  /* Mode overlay tightens at mobile */
  .mode-overlay { padding: 14px; }
  .mode-sheet { padding: 24px 20px 18px; }
  .mode-choice { padding: 12px 14px; gap: 12px; }
  .mode-choice strong { font-size: 1rem; }
  .mode-choice em { font-size: 0.84rem; }

  /* Footer wraps the mode switcher onto its own line */
  .studio-footer { row-gap: 6px; }
  .mode-switch { width: 100%; }
}

@media (max-width: 420px) {
  body.mode-show #studio-title { font-size: clamp(1.4rem, 9vw, 2rem); }
  .mode-sheet h2 { font-size: clamp(1.3rem, 6vw, 1.6rem); }
}