/* Tesla Pulse v0 — stark black, stainless, Roadster red sparingly */

:root {
  --bg: #0a0a0a;
  --bg-panel: #111111;
  --bg-elevated: #161616;
  --bg-hover: #1a1a1a;
  --text: #f2f2f2;
  --text-dim: #a8a8a8;
  --steel: #c0c0c0;
  --steel-dark: #8a8a8a;
  --red: #E82127;
  --red-dim: #9a1620;
  --hairline: rgba(192, 192, 192, 0.22);
  --hairline-strong: rgba(192, 192, 192, 0.4);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue Condensed", "Arial Narrow", sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --clip: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  --clip-sm: polygon(0 0, calc(100% - 6px) 0, 100% 6px, 100% 100%, 6px 100%, 0 calc(100% - 6px));
}

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

html {
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.45;
  background-image:
    linear-gradient(180deg, rgba(192,192,192,0.03) 0%, transparent 40%),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 2px,
      rgba(255,255,255,0.008) 2px,
      rgba(255,255,255,0.008) 3px
    );
}

/* Progressive disclosure */
body[data-level="beginner"] .level-operator,
body[data-level="beginner"] .level-expert { display: none !important; }

body[data-level="operator"] .level-expert { display: none !important; }
/* operator sees beginner + operator */

body[data-level="expert"] .level-beginner,
body[data-level="expert"] .level-operator,
body[data-level="expert"] .level-expert { display: block; }
/* expert sees all — blocks use display from their element type */

body[data-level="expert"] span.level-beginner,
body[data-level="expert"] span.level-operator,
body[data-level="expert"] span.level-expert { display: inline; }

body[data-level="operator"] .level-beginner { display: block; }
body[data-level="operator"] span.level-beginner { display: inline; }

/* Layout */
.shell {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.25rem 3rem;
}

/* Header */
.site-header {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: end;
  padding: 1.5rem 0 1.25rem;
  border-bottom: 1px solid var(--hairline-strong);
  margin-bottom: 1.5rem;
  clip-path: none;
  position: relative;
}

.site-header::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 72px;
  height: 2px;
  background: var(--red);
}

.wordmark {
  font-family: var(--font-display);
  font-size: 1.85rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 0;
  color: var(--text);
  line-height: 1;
}

.wordmark span {
  color: var(--steel);
  font-weight: 500;
}

.tagline {
  margin: 0.4rem 0 0;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--steel-dark);
}

.header-meta {
  text-align: right;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--steel-dark);
  line-height: 1.6;
}

.header-meta .updated {
  color: var(--steel);
}

.header-meta .version {
  color: var(--red);
  letter-spacing: 0.08em;
}

/* Level control */
.level-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.75rem;
  padding: 0.65rem 0.85rem;
  background: linear-gradient(135deg, #141414 0%, #0e0e0e 50%, #151515 100%);
  border: 1px solid var(--hairline);
  clip-path: var(--clip-sm);
}

.level-bar label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--steel-dark);
}

.level-toggle {
  display: flex;
  gap: 0;
  border: 1px solid var(--hairline-strong);
}

.level-toggle button {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--steel-dark);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.45rem 0.85rem;
  cursor: pointer;
  border-right: 1px solid var(--hairline);
  transition: background 0.15s, color 0.15s;
}

.level-toggle button:last-child { border-right: none; }

.level-toggle button:hover {
  background: var(--bg-hover);
  color: var(--steel);
}

.level-toggle button.active {
  background: var(--red);
  color: #fff;
}

/* Sections */
.section {
  margin-bottom: 2.25rem;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.85rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--hairline);
}

.section-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel);
}

.section-head .hint {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--steel-dark);
  letter-spacing: 0.04em;
}

/* Sector layout */
.sector-layout {
  display: grid;
  grid-template-columns: minmax(200px, 240px) 1fr;
  gap: 1rem;
  min-height: 320px;
}

@media (max-width: 720px) {
  .sector-layout { grid-template-columns: 1fr; }
  .site-header { grid-template-columns: 1fr; }
  .header-meta { text-align: left; }
}

.sector-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  border: 1px solid var(--hairline);
  background: var(--bg-panel);
  padding: 4px;
  clip-path: var(--clip);
}

.sector-nav button {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--text-dim);
  text-align: left;
  font-family: var(--font);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 0.65rem 0.75rem;
  cursor: pointer;
  clip-path: var(--clip-sm);
  transition: background 0.12s, color 0.12s;
  border-left: 2px solid transparent;
}

.sector-nav button:hover {
  background: var(--bg-hover);
  color: var(--text);
}

.sector-nav button.active {
  background: var(--bg-elevated);
  color: var(--text);
  border-left-color: var(--red);
}

.sector-detail {
  border: 1px solid var(--hairline);
  background:
    linear-gradient(145deg, rgba(192,192,192,0.04) 0%, transparent 45%),
    var(--bg-panel);
  padding: 1.15rem 1.25rem 1.35rem;
  clip-path: var(--clip);
  position: relative;
}

.sector-detail h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.sector-detail .blurb {
  margin: 0 0 1rem;
  color: var(--steel);
  font-size: 0.9rem;
}

.detail-block {
  margin-bottom: 0.9rem;
}

.detail-block .label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 0.25rem;
}

.detail-block p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.88rem;
}

.detail-tabs {
  display: flex;
  gap: 0;
  margin: 1rem 0 0.75rem;
  border: 1px solid var(--hairline);
  width: fit-content;
}

.detail-tabs button {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--steel-dark);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.4rem 0.7rem;
  cursor: pointer;
  border-right: 1px solid var(--hairline);
}

.detail-tabs button:last-child { border-right: none; }

.detail-tabs button.active {
  background: var(--bg-elevated);
  color: var(--steel);
}

.disclosure-pane {
  font-size: 0.88rem;
  color: var(--text-dim);
  min-height: 3.5rem;
}

.disclosure-pane[hidden] { display: none; }

/* Moat cards */
.moat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0.75rem;
}

.moat-card {
  border: 1px solid var(--hairline);
  background: var(--bg-panel);
  padding: 1rem 1.05rem 1.1rem;
  clip-path: var(--clip-sm);
  position: relative;
}

.moat-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, transparent 50%, rgba(192,192,192,0.08) 50%);
  pointer-events: none;
}

.moat-card h3 {
  margin: 0 0 0.55rem;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.strength-bars {
  display: flex;
  gap: 3px;
  margin-bottom: 0.75rem;
}

.strength-bars i {
  display: block;
  width: 18px;
  height: 6px;
  background: #2a2a2a;
  border: 1px solid var(--hairline);
}

.strength-bars i.on {
  background: linear-gradient(90deg, var(--red-dim), var(--red));
  border-color: var(--red);
}

.strength-bars i.on.steel {
  background: linear-gradient(90deg, #6a6a6a, var(--steel));
  border-color: var(--steel-dark);
}

.moat-card .why {
  margin: 0 0 0.75rem;
  font-size: 0.84rem;
  color: var(--text-dim);
}

.moat-card .erosion-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--steel-dark);
  margin-bottom: 0.3rem;
}

.moat-card ul {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.78rem;
  color: var(--steel-dark);
}

.moat-card li { margin-bottom: 0.2rem; }

/* Collab */
.collab-wrap {
  border: 1px solid var(--hairline);
  background: var(--bg-panel);
  padding: 1.25rem;
  clip-path: var(--clip);
}

.collab-graph {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.collab-center {
  display: flex;
  justify-content: center;
}

.collab-node {
  border: 1px solid var(--hairline-strong);
  background: linear-gradient(160deg, #1a1a1a, #101010);
  padding: 0.75rem 1rem;
  clip-path: var(--clip-sm);
  max-width: 420px;
  width: 100%;
}

.collab-node.center {
  border-color: var(--red);
  box-shadow: inset 0 0 0 1px rgba(227, 25, 55, 0.25);
}

.collab-node .name {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 0.85rem;
  margin-bottom: 0.25rem;
}

.collab-node.center .name { color: var(--red); }

.collab-node .role {
  font-size: 0.78rem;
  color: var(--steel);
  margin-bottom: 0.35rem;
}

.collab-node .context {
  font-size: 0.76rem;
  color: var(--steel-dark);
}

.collab-spokes {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.65rem;
}

.spoke {
  position: relative;
  padding-top: 0.5rem;
}

.spoke::before {
  content: attr(data-edge);
  display: block;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 0.35rem;
  text-align: center;
}

.spoke .line {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--steel-dark), transparent);
  margin-bottom: 0.5rem;
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 1.25rem;
  border-left: 1px solid var(--hairline-strong);
  margin-left: 0.35rem;
}

.timeline-item {
  position: relative;
  padding: 0 0 1.35rem 1rem;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -1.25rem;
  top: 0.35rem;
  width: 7px;
  height: 7px;
  background: var(--steel-dark);
  border: 1px solid var(--steel);
  transform: translateX(-50%) rotate(45deg);
}

.timeline-item:last-child { padding-bottom: 0; }

.timeline-item .date {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--red);
  letter-spacing: 0.06em;
  margin-bottom: 0.2rem;
}

.timeline-item h3 {
  margin: 0 0 0.35rem;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.timeline-item .summary {
  margin: 0 0 0.45rem;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.timeline-item .thought {
  margin: 0;
  font-size: 0.8rem;
  color: var(--steel-dark);
  border-left: 2px solid var(--hairline);
  padding-left: 0.65rem;
}

.timeline-item .thought::before {
  content: "THOUGHT · ";
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  color: var(--steel-dark);
}

/* Footer */
.site-footer {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--hairline);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--steel-dark);
  letter-spacing: 0.06em;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.status-pill {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  border: 1px solid var(--hairline);
  color: var(--steel);
}

.status-pill.warn {
  border-color: var(--red-dim);
  color: var(--red);
}

/* Empty / loading */
.muted {
  color: var(--steel-dark);
  font-size: 0.85rem;
}

/* Sticky in-page nav */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 0;
  margin: -0.25rem 0 1.25rem;
  padding: 0.55rem 0.35rem;
  background: rgba(10, 10, 10, 0.92);
  border-bottom: 1px solid var(--hairline);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.site-nav a {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--steel-dark);
  padding: 0.4rem 0.7rem;
  border: 1px solid transparent;
  clip-path: var(--clip-sm);
  transition: color 0.12s, border-color 0.12s, background 0.12s;
}

.site-nav a:hover {
  color: var(--steel);
  background: var(--bg-hover);
  border-color: var(--hairline);
}

.site-nav a:focus-visible {
  outline: none;
  color: var(--text);
  border-color: var(--red);
}

.section-blurb {
  margin: 0 0 0.85rem;
  font-size: 0.88rem;
  color: var(--steel);
}

/* NFA strip — unmistakable */
.nfa-strip {
  display: grid;
  gap: 0.35rem;
  margin-bottom: 1rem;
  padding: 0.85rem 1rem;
  background:
    repeating-linear-gradient(
      -45deg,
      rgba(227, 25, 55, 0.12),
      rgba(227, 25, 55, 0.12) 8px,
      rgba(227, 25, 55, 0.04) 8px,
      rgba(227, 25, 55, 0.04) 16px
    ),
    var(--bg-elevated);
  border: 2px solid var(--red);
  clip-path: var(--clip-sm);
  box-shadow: inset 0 0 0 1px rgba(227, 25, 55, 0.35);
}

.nfa-strip .nfa-label {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--red);
}

.nfa-strip .nfa-text {
  margin: 0;
  font-size: 0.82rem;
  color: var(--text);
  line-height: 1.4;
}

/* Investors panels */
.investor-layout {
  display: grid;
  grid-template-columns: minmax(180px, 220px) 1fr;
  gap: 1rem;
  min-height: 240px;
}

@media (max-width: 720px) {
  .investor-layout { grid-template-columns: 1fr; }
}

.investor-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  border: 1px solid var(--hairline);
  background: var(--bg-panel);
  padding: 4px;
  clip-path: var(--clip);
}

.investor-nav button {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--text-dim);
  text-align: left;
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 0.6rem 0.7rem;
  cursor: pointer;
  clip-path: var(--clip-sm);
  transition: background 0.12s, color 0.12s;
  border-left: 2px solid transparent;
}

.investor-nav button:hover {
  background: var(--bg-hover);
  color: var(--text);
}

.investor-nav button.active {
  background: var(--bg-elevated);
  color: var(--text);
  border-left-color: var(--red);
}

.investor-panel {
  border: 1px solid var(--hairline);
  background:
    linear-gradient(145deg, rgba(192,192,192,0.04) 0%, transparent 45%),
    var(--bg-panel);
  padding: 1.15rem 1.25rem 1.35rem;
  clip-path: var(--clip);
}

.investor-panel h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.investor-panel .blurb {
  margin: 0 0 1rem;
  color: var(--steel);
  font-size: 0.9rem;
}

/* Verified Voltage */
.vv-rules {
  margin-bottom: 1rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--hairline-strong);
  background: var(--bg-panel);
  clip-path: var(--clip-sm);
}

.vv-rules-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 0.45rem;
}

.vv-rules ul {
  margin: 0;
  padding-left: 1.15rem;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.vv-rules li { margin-bottom: 0.3rem; }

.vv-empty {
  border: 1px dashed var(--hairline-strong);
  padding: 1.25rem 1rem;
  clip-path: var(--clip-sm);
  background: rgba(255,255,255,0.015);
}

.quote-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0.75rem;
}

.quote-card {
  border: 1px solid var(--hairline);
  background: var(--bg-panel);
  padding: 1rem 1.05rem 1.1rem;
  clip-path: var(--clip-sm);
  position: relative;
}

.quote-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, transparent 50%, rgba(192,192,192,0.08) 50%);
  pointer-events: none;
}

.quote-card blockquote {
  margin: 0 0 0.75rem;
  padding: 0;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
  line-height: 1.4;
  border: none;
}

.quote-card blockquote::before {
  content: "“";
  color: var(--red);
  margin-right: 0.15rem;
}

.quote-meta {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  margin-bottom: 0.65rem;
}

.quote-attr {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--steel);
}

.quote-context {
  font-size: 0.78rem;
  color: var(--steel-dark);
}

.quote-source {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
}

.quote-source a {
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid var(--hairline);
}

.quote-source a:hover {
  color: var(--text);
  border-bottom-color: var(--red);
}

.vv-badge {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--steel);
  border: 1px solid var(--hairline-strong);
  padding: 0.12rem 0.4rem;
}


/* === Signal Diagrams / Hero (Pulse assets) === */
.hero-strip {
  position: relative;
  margin: -0.5rem 0 1.25rem;
  border: 1px solid var(--hairline);
  clip-path: var(--clip);
  overflow: hidden;
  background: #0a0a0a;
  min-height: 140px;
  max-height: 220px;
}

.hero-strip .hero-img {
  display: block;
  width: 100%;
  height: 180px;
  object-fit: cover;
  object-position: center;
}

.hero-strip .hero-veil {
  pointer-events: none;
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(10,10,10,0.55) 0%, transparent 40%, rgba(10,10,10,0.35) 100%),
    linear-gradient(180deg, transparent 50%, rgba(10,10,10,0.55) 100%);
}

.hero-strip::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 64px;
  height: 2px;
  background: var(--red);
}

.explainer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.explainer-card {
  display: grid;
  grid-template-columns: minmax(220px, 38%) 1fr;
  gap: 0;
  border: 1px solid var(--hairline);
  background: var(--bg-panel);
  clip-path: var(--clip);
  overflow: hidden;
}

@media (max-width: 820px) {
  .explainer-card { grid-template-columns: 1fr; }
  .hero-strip .hero-img { height: 140px; }
}

.explainer-visual {
  position: relative;
  background: #050505;
  border-right: 1px solid var(--hairline);
  min-height: 200px;
}

@media (max-width: 820px) {
  .explainer-visual { border-right: none; border-bottom: 1px solid var(--hairline); }
}

.explainer-visual img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 200px;
  max-height: 280px;
  object-fit: cover;
  object-position: center;
}

.explainer-body {
  padding: 1rem 1.1rem 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  min-width: 0;
}

.explainer-body h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text);
}

.explainer-sectors {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.explainer-sectors span {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--steel-dark);
  border: 1px solid var(--hairline);
  padding: 0.15rem 0.4rem;
}

.explainer-blurb {
  margin: 0;
  font-size: 0.86rem;
  color: var(--text-dim);
  line-height: 1.45;
}

.explainer-blurb.level-expert { color: var(--steel); }

/* cyber-terminal code */
.code-terminal {
  margin: 0.15rem 0 0;
  border: 1px solid var(--hairline-strong);
  background: #070707;
  clip-path: var(--clip-sm);
  overflow: hidden;
}

.code-terminal .code-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.35rem 0.65rem;
  border-bottom: 1px solid var(--hairline);
  background: linear-gradient(90deg, rgba(232,33,39,0.12), transparent 55%);
}

.code-terminal .code-bar span {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--steel-dark);
}

.code-terminal pre {
  margin: 0;
  padding: 0;
  overflow-x: auto;
  background: transparent;
}

.code-terminal code {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.55;
  color: #d4d4d4;
  padding: 0.75rem 0.85rem 0.85rem 0;
  white-space: pre;
  tab-size: 2;
}

.code-lines {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0;
}

.code-linenums {
  user-select: none;
  padding: 0.75rem 0.55rem 0.85rem 0.65rem;
  border-right: 2px solid var(--red);
  background: #0b0b0b;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.55;
  color: #5a5a5a;
  text-align: right;
}

.code-linenums span {
  display: block;
}


/* --- Pulse reliability / section polish --- */
.hero-strip img { width:100%; max-height:260px; object-fit:cover; display:block; background:#0a0a0b; }
.explainer-visual img { width:100%; display:block; background:#000; min-height:140px; object-fit:cover; border:1px solid #2a2a30; border-radius:4px; }
.explainer-card { align-items:stretch; }
.vv-empty, .empty-state { border:1px dashed #3a3a42; padding:1rem 1.1rem; color:#9a9aa0; border-radius:6px; background:#101012; }
.vv-empty strong { color:#E82127; display:block; margin-bottom:0.35rem; letter-spacing:0.08em; text-transform:uppercase; font-size:0.72rem; }
.code-terminal { margin-top:0.75rem; }
.site-nav a[href="#explainers"] { color:#f0f0f2; }

/* =====================================================================
   Sector tree centerpiece (schemaVersion 2)
   ===================================================================== */

.shell {
  max-width: 1440px;
}

.hero-strip-compact {
  margin-bottom: 0.75rem;
}
.hero-strip-compact img {
  max-height: 140px !important;
}

.section-hero {
  margin-bottom: 2.75rem;
}
.section-hero .section-head h2 {
  font-size: 1.15rem;
  color: var(--text);
  letter-spacing: 0.18em;
}
.section-hero .section-head .hint {
  color: var(--steel);
}

.sector-layout-hero {
  grid-template-columns: minmax(260px, 320px) 1fr;
  gap: 1.15rem;
  min-height: 560px;
}

@media (max-width: 900px) {
  .sector-layout-hero {
    grid-template-columns: 1fr;
    min-height: 0;
  }
}

.sector-tree-panel {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--hairline-strong);
  background:
    linear-gradient(180deg, rgba(232, 33, 39, 0.06) 0%, transparent 28%),
    var(--bg-panel);
  clip-path: var(--clip);
  overflow: hidden;
  min-height: 520px;
}

.sector-tree-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--hairline);
}
.sector-tree-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel);
}

.sector-tree {
  flex: 1;
  overflow: auto;
  padding: 0.4rem 0.35rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.tree-row {
  display: flex;
  align-items: stretch;
  gap: 2px;
  padding-left: calc(var(--depth, 0) * 0.85rem);
  border-left: 2px solid transparent;
}
.tree-row.active {
  border-left-color: var(--red);
}
.tree-row.active .tree-select {
  background: var(--bg-elevated);
  color: var(--text);
}

.tree-twist {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--steel-dark);
  width: 1.4rem;
  min-width: 1.4rem;
  cursor: pointer;
  font-size: 0.7rem;
  padding: 0;
}
.tree-twist.spacer {
  cursor: default;
  opacity: 0.35;
}
.tree-twist.open { color: var(--red); }

.tree-select {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex: 1;
  text-align: left;
  font-family: var(--font);
  font-size: 0.84rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 0.55rem 0.55rem;
  cursor: pointer;
  clip-path: var(--clip-sm);
  transition: background 0.12s, color 0.12s;
}
.tree-select:hover {
  background: var(--bg-hover);
  color: var(--text);
}
.tree-ico {
  width: 1.25rem;
  text-align: center;
  opacity: 0.9;
  font-size: 0.85rem;
}
.tree-name { flex: 1; }

.sector-detail {
  min-height: 520px;
  display: flex;
  flex-direction: column;
  padding: 1.25rem 1.35rem 1.5rem;
  border-color: var(--hairline-strong);
  background:
    linear-gradient(145deg, rgba(192,192,192,0.06) 0%, transparent 42%),
    linear-gradient(180deg, rgba(232,33,39,0.04) 0%, transparent 30%),
    var(--bg-panel);
}

.sector-detail-head {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
  margin-bottom: 0.75rem;
}
.sector-detail-ico {
  width: 2.4rem;
  height: 2.4rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--hairline-strong);
  background: #0c0c0c;
  clip-path: var(--clip-sm);
  font-size: 1.15rem;
  color: var(--steel);
}
.sector-detail-titles h3 {
  margin: 0 0 0.3rem;
  font-size: 1.45rem;
}
.sector-detail-titles .blurb {
  margin: 0;
}

.depth-chip {
  display: flex;
  gap: 0.65rem;
  align-items: baseline;
  margin-bottom: 0.85rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--hairline);
  background: rgba(0,0,0,0.35);
  clip-path: var(--clip-sm);
}
.depth-chip-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--red);
  flex-shrink: 0;
}
.depth-chip-text {
  font-size: 0.84rem;
  color: var(--text-dim);
}

.sector-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 0 0 0.9rem;
  border: 1px solid var(--hairline-strong);
  width: 100%;
  background: #0c0c0c;
}
.sector-tabs button {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--steel-dark);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.55rem 0.7rem;
  cursor: pointer;
  border-right: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  flex: 1 1 auto;
  text-align: center;
  transition: background 0.12s, color 0.12s;
}
.sector-tabs button:hover {
  background: var(--bg-hover);
  color: var(--steel);
}
.sector-tabs button.active {
  background: var(--red);
  color: #fff;
  border-color: var(--red-dim);
}

.sector-tab-body {
  flex: 1;
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.5;
}
.sector-tab-body > p { margin: 0 0 0.85rem; }
.tab-empty { font-style: italic; opacity: 0.8; }

.how-steps {
  margin: 0.5rem 0 0;
  padding-left: 1.15rem;
  color: var(--text-dim);
}
.how-steps li { margin-bottom: 0.45rem; }
.how-steps strong { color: var(--steel); }

.ref-card-list {
  display: grid;
  gap: 0.55rem;
}
.ref-card {
  border: 1px solid var(--hairline);
  background: rgba(0,0,0,0.28);
  padding: 0.7rem 0.8rem;
  clip-path: var(--clip-sm);
}
.ref-card h4 {
  margin: 0 0 0.3rem;
  font-size: 0.88rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--steel);
}
.ref-card p { margin: 0 0 0.35rem; font-size: 0.84rem; }

.fact-card {
  border-left: 2px solid var(--red);
  padding: 0.35rem 0 0.55rem 0.75rem;
  margin-bottom: 0.65rem;
}
.fact-card h4 {
  margin: 0 0 0.25rem;
  font-size: 0.9rem;
  color: var(--text);
}

.nfa-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: baseline;
  margin-bottom: 0.75rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--red-dim);
  background: rgba(232, 33, 39, 0.08);
  clip-path: var(--clip-sm);
  font-size: 0.8rem;
  color: var(--text-dim);
}
.nfa-inline strong {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  color: var(--red);
}

.ghost-btn {
  appearance: none;
  border: 1px solid var(--hairline-strong);
  background: transparent;
  color: var(--steel);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.35rem 0.6rem;
  cursor: pointer;
  clip-path: var(--clip-sm);
}
.ghost-btn:hover {
  border-color: var(--red);
  color: #fff;
  background: rgba(232, 33, 39, 0.15);
}
.slide-trigger { margin: 0.35rem 0.35rem 0.35rem 0; }

.table-triggers { margin-top: 0.75rem; }

.pulse-link-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-top: 0.5rem;
}
.pulse-link {
  color: var(--steel);
  text-decoration: none;
  font-size: 0.84rem;
  border-bottom: 1px solid transparent;
}
.pulse-link:hover {
  color: #fff;
  border-bottom-color: var(--red);
}

.related-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--hairline);
}
.related-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--steel-dark);
  margin-right: 0.25rem;
}
.chip-link {
  appearance: none;
  border: 1px solid var(--hairline);
  background: #0c0c0c;
  color: var(--steel);
  font-size: 0.75rem;
  padding: 0.28rem 0.55rem;
  cursor: pointer;
  clip-path: var(--clip-sm);
}
.chip-link:hover {
  border-color: var(--red);
  color: #fff;
}

.media-row {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.6rem;
  margin-top: 0.85rem;
}
.media-fig {
  margin: 0;
  border: 1px solid var(--hairline);
  background: #000;
}
.media-fig img { width: 100%; display: block; }
.media-fig figcaption {
  padding: 0.35rem 0.45rem;
  font-size: 0.7rem;
  color: var(--steel-dark);
}

.mini-timeline { display: grid; gap: 0.65rem; }
.mini-tl-item {
  border-left: 2px solid var(--steel-dark);
  padding-left: 0.7rem;
}
.mini-tl-date {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--red);
  letter-spacing: 0.06em;
}
.mini-tl-item h4 {
  margin: 0.15rem 0 0.25rem;
  font-size: 0.88rem;
  color: var(--text);
}

.pulse-table-wrap { overflow: auto; }
.pulse-table-title {
  margin: 0 0 0.5rem;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--steel);
}
.pulse-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}
.pulse-table th,
.pulse-table td {
  border: 1px solid var(--hairline);
  padding: 0.45rem 0.55rem;
  text-align: left;
  vertical-align: top;
}
.pulse-table th {
  background: #0c0c0c;
  color: var(--steel);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.pulse-table td { color: var(--text-dim); }

/* Slide-over */
.slide-over[hidden] { display: none !important; }
.slide-over {
  position: fixed;
  inset: 0;
  z-index: 80;
}
.slide-over-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(2px);
}
.slide-over-panel {
  position: absolute;
  top: 0;
  right: 0;
  height: 100%;
  width: min(520px, 96vw);
  background:
    linear-gradient(180deg, rgba(232,33,39,0.08) 0%, transparent 18%),
    #101010;
  border-left: 1px solid var(--hairline-strong);
  box-shadow: -12px 0 40px rgba(0,0,0,0.55);
  display: flex;
  flex-direction: column;
  animation: slideIn 0.18s ease-out;
}
@keyframes slideIn {
  from { transform: translateX(12px); opacity: 0.6; }
  to { transform: translateX(0); opacity: 1; }
}
.slide-over-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1rem 1.1rem;
  border-bottom: 1px solid var(--hairline);
}
.slide-over-head h3 {
  margin: 0;
  font-size: 0.95rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--steel);
}
.slide-over-body {
  flex: 1;
  overflow: auto;
  padding: 1rem 1.1rem 1.5rem;
}

body.slide-over-open { overflow: hidden; }

/* Ensure voltage red token matches brief */
:root { --red: #e82127; }

/* —— Three.js Sector Tree (additive) —— */
.sector-layout-3d {
  grid-template-columns: minmax(340px, 1.15fr) minmax(320px, 0.95fr);
  min-height: 640px;
}
@media (max-width: 900px) {
  .sector-layout-3d {
    grid-template-columns: 1fr;
    min-height: 0;
  }
}

.sector-tree-panel-3d {
  min-height: 600px;
  background:
    radial-gradient(ellipse 80% 50% at 50% 18%, rgba(232, 33, 39, 0.09) 0%, transparent 55%),
    linear-gradient(180deg, #050505 0%, #0a0a0a 100%);
}

.sector-tree-actions {
  display: flex;
  gap: 0.25rem;
  align-items: center;
}

.sector-tree-3d-wrap {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 520px;
}

.sector-tree-3d,
.st3d-host {
  position: relative;
  flex: 1;
  width: 100%;
  min-height: 500px;
  background: #000;
  overflow: hidden;
  cursor: grab;
  touch-action: none;
}
.sector-tree-3d:active,
.st3d-host:active { cursor: grabbing; }

.st3d-canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

.st3d-labels {
  z-index: 2;
}

.st3d-hint {
  margin: 0;
  padding: 0.45rem 0.75rem 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--steel-dark);
  border-top: 1px solid var(--hairline);
  background: rgba(0,0,0,0.55);
}

.st3d-label {
  font-family: var(--font);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: rgba(192, 192, 192, 0.72);
  padding: 0.18rem 0.45rem;
  border: 1px solid transparent;
  background: rgba(0, 0, 0, 0.55);
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
  transition: color 0.15s, border-color 0.15s, background 0.15s, opacity 0.15s;
  clip-path: polygon(0 0, calc(100% - 5px) 0, 100% 5px, 100% 100%, 5px 100%, 0 calc(100% - 5px));
}
.st3d-label-root {
  font-size: 0.78rem;
  color: rgba(242, 242, 242, 0.88);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-family: var(--font-mono);
  font-size: 0.65rem;
}
.st3d-label-apex {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #f2f2f2;
  border-color: rgba(232, 33, 39, 0.55);
  background: linear-gradient(180deg, rgba(232, 33, 39, 0.22) 0%, rgba(0,0,0,0.75) 100%);
  padding: 0.35rem 0.7rem;
  box-shadow: 0 0 18px rgba(232, 33, 39, 0.25);
}
.st3d-label.is-selected {
  color: #fff;
  border-color: var(--red);
  background: rgba(232, 33, 39, 0.18);
  opacity: 1;
}

.sector-detail.is-apex .sector-detail-ico {
  color: var(--red);
  border-color: rgba(232, 33, 39, 0.5);
  box-shadow: 0 0 12px rgba(232, 33, 39, 0.25);
}


/* —— 3D mission tree viewport (classic Three.js) —— */
.sector-layout-3d {
  grid-template-columns: minmax(360px, 1.2fr) minmax(300px, 0.9fr);
  min-height: 640px;
}
@media (max-width: 900px) {
  .sector-layout-3d { grid-template-columns: 1fr; min-height: 0; }
}
.sector-tree-panel-3d {
  display: flex;
  flex-direction: column;
  min-height: 600px;
  background:
    radial-gradient(ellipse 80% 50% at 50% 18%, rgba(232, 33, 39, 0.1) 0%, transparent 55%),
    linear-gradient(180deg, #050505 0%, #0a0a0a 100%);
  border: 1px solid var(--hairline);
  clip-path: var(--clip);
}
.sector-tree-actions { display: flex; gap: 0.25rem; align-items: center; }
.sector-tree-viewport-wrap {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 560px;
}
.sector-tree-viewport,
.st3d-host {
  position: relative;
  flex: 1;
  min-height: 480px;
  height: min(62vh, 640px);
  width: 100%;
  min-height: 560px;
  background: #000;
  overflow: hidden;
  cursor: grab;
  touch-action: none;
}
.sector-tree-viewport:active,
.st3d-host:active { cursor: grabbing; }
.st3d-canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}
.st3d-hint {
  margin: 0;
  padding: 0.45rem 0.75rem 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--steel-dark, #8a8a8a);
  border-top: 1px solid var(--hairline);
  background: rgba(0,0,0,0.55);
}
.st3d-label-layer { z-index: 2; }
.st3d-label {
  position: absolute;
  left: 0; top: 0;
  font-family: var(--font);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: rgba(192, 192, 192, 0.78);
  padding: 0.18rem 0.45rem;
  border: 1px solid transparent;
  background: rgba(0, 0, 0, 0.6);
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
  transition: color 0.15s, border-color 0.15s, background 0.15s, opacity 0.15s;
  clip-path: polygon(0 0, calc(100% - 5px) 0, 100% 5px, 100% 100%, 5px 100%, 0 calc(100% - 5px));
  will-change: transform, opacity;
}
.st3d-label-root {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(242, 242, 242, 0.9);
}
.st3d-label-apex {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #f2f2f2;
  border-color: rgba(232, 33, 39, 0.55);
  background: linear-gradient(180deg, rgba(232, 33, 39, 0.22) 0%, rgba(0,0,0,0.75) 100%);
  padding: 0.35rem 0.7rem;
  box-shadow: 0 0 18px rgba(232, 33, 39, 0.25);
}
.st3d-label.is-selected,
.st3d-label.is-hover {
  color: #fff;
  border-color: var(--red);
  background: rgba(232, 33, 39, 0.18);
  opacity: 1;
}
body.sector-tree-2d-active .sector-tree-viewport-wrap { display: none; }
body.sector-tree-3d-active .sector-tree-fallback[hidden] { display: none !important; }
.sector-detail.is-apex .sector-detail-ico {
  color: var(--red);
  border-color: rgba(232, 33, 39, 0.5);
  box-shadow: 0 0 12px rgba(232, 33, 39, 0.25);
}


/* Mission primer */
.mission-primer{margin:0 0 1.25rem;padding:1.1rem 1.25rem;border:1px solid #2a2a30;border-left:3px solid #e82127;background:linear-gradient(135deg,#0c0c0e 0%,#141418 100%);border-radius:2px;}
.mission-kicker{margin:0 0 .35rem;font-size:.7rem;letter-spacing:.18em;text-transform:uppercase;color:#e82127;}
.mission-title{margin:0 0 .55rem;font-size:1.25rem;font-weight:600;color:#f2f2f2;letter-spacing:.02em;}
.mission-body{margin:0 0 .85rem;color:#a8a8b0;line-height:1.55;max-width:62ch;}
.mission-steps{margin:0;padding:0;list-style:none;display:flex;flex-wrap:wrap;gap:.5rem .9rem;}
.mission-steps li{margin:0;}
.text-btn{background:none;border:1px solid #3a3a42;color:#e8e8ec;padding:.35rem .65rem;border-radius:2px;font:inherit;font-size:.8rem;cursor:pointer;}
.text-btn:hover,.text-btn:focus-visible{border-color:#e82127;color:#fff;}
.vv-empty{padding:1rem;border:1px dashed #333;color:#888;font-size:.9rem;}
.mobile-tree-hint{display:none;font-size:.75rem;color:#888;margin:.4rem 0 0;}
@media (max-width:720px){
  .mobile-tree-hint{display:block;}
  .mission-title{font-size:1.05rem;}
  .sector-tree-viewport{min-height:320px;}
}