:root {
  --bg: #000000;
  --surface: #111111;
  --panel: #1a1a1a;
  --text: #ffffff;
  --muted: #cccccc;
  --dim: #777777;
  --line: #333333;
  --accent: #ff7a00;
  --up: #ff7a00;
  --down: #666666;
  --mono: 'SF Mono', 'Consolas', 'Menlo', 'Courier New', monospace;
}

:root.light-theme {
  --bg: #fafafa;
  --surface: #ffffff;
  --panel: #f0f0f0;
  --text: #111111;
  --muted: #444444;
  --dim: #888888;
  --line: #e2e2e2;
  --accent: #e06000;
  --up: #e06000;
  --down: #999999;
}

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

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 15px;
  min-height: 100vh;
}

/* ── Layout ── */

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

.wrap-narrow {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Topbar ── */

.topbar {
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
}

.topbar .inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand-mark {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--text);
  text-decoration: none;
  text-transform: uppercase;
}

.brand-mark img {
  height: 24px;
  width: auto;
  vertical-align: middle;
  margin-right: 10px;
}

html.light-theme .brand-mark img {
  /* No filter needed as the logo is already orange on transparent background */
}

.brand-mark span.sep {
  color: var(--line);
  margin: 0 8px;
}

.brand-mark span.sub {
  color: var(--muted);
  font-weight: 400;
}

.topnav {
  display: flex;
  gap: 28px;
  align-items: center;
}

.topnav a {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text);
  text-decoration: none;
  transition: color 0.15s;
}

.topnav a:hover, .topnav a.active {
  color: var(--accent);
}

/* ── Page sections ── */

.page-section {
  padding: 64px 0;
  border-bottom: 1px solid var(--line);
}

.page-section:last-child {
  border-bottom: none;
}

/* ── Typography ── */

.kicker {
  font-family: var(--mono);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

h1 {
  font-size: 32px;
  font-weight: 400;
  line-height: 1.25;
  margin: 0 0 24px;
  color: var(--text);
  letter-spacing: -.01em;
}

h2 {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -.01em;
  margin: 0 0 12px;
  color: var(--text);
}

.lead {
  color: var(--muted);
  font-size: 16px;
  max-width: 560px;
  margin: 0 0 36px;
  line-height: 1.7;
}

p {
  color: var(--muted);
  margin: 0 0 16px;
}

p:last-child { margin-bottom: 0; }

/* ── Inline link ── */

a.text-link {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(200, 223, 245, 0.35);
}

a.text-link:hover {
  text-decoration-color: var(--accent);
}

/* ── Action link ── */

.action-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line);
  padding: 10px 18px;
  border-radius: 2px;
  transition: border-color 0.15s, color 0.15s;
}

.action-link:hover {
  border-color: var(--muted);
  color: var(--text);
}

.action-link.primary {
  border-color: rgba(255, 122, 0, 0.35);
  color: var(--accent);
}

.action-link.primary:hover {
  border-color: var(--accent);
}

.action-link.inverse {
  background: #ffffff;
  color: #000000;
  border-color: #ffffff;
}

.action-link.inverse:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #000000;
}

/* ── Rule ── */

.rule {
  border: none;
  border-top: 1px solid var(--line);
  margin: 0;
}

/* ── Observation Index cards ── */

.surface-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 40px;
}

.surface-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 20px 24px;
  background: var(--surface);
  text-decoration: none;
  transition: background 0.12s;
}

.surface-row:hover {
  background: var(--panel);
}

.surface-row.dormant {
  opacity: 0.45;
  pointer-events: none;
  cursor: default;
}

.surface-num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--dim);
  flex-shrink: 0;
  width: 80px;
}

.surface-label {
  flex: 1;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text);
}

.surface-row.dormant .surface-label {
  color: var(--dim);
}

.surface-status {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .14em;
  text-transform: uppercase;
  flex-shrink: 0;
}

.status-active { color: var(--up); }
.status-dormant { color: var(--dim); }

.surface-arrow {
  font-size: 14px;
  color: var(--dim);
  flex-shrink: 0;
}

/* ── Signal Panel (Reinsurance Page) ── */

.obs-header {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--dim);
  border-bottom: 1px solid var(--line);
  padding-bottom: 16px;
  margin-bottom: 32px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
}

.obs-header .dist-tag {
  color: var(--dim);
  font-size: 10px;
}

.panel-block {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 24px 28px;
  margin-bottom: 16px;
}

.panel-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 20px;
}

.signal-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 10px;
}

.signal-row:last-child { margin-bottom: 0; }

.sig-name {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  width: 240px;
  flex-shrink: 0;
}

.bar-track {
  flex: 1;
  max-width: 200px;
  height: 6px;
  background: var(--line);
  border-radius: 1px;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  background: var(--muted);
  border-radius: 1px;
}

.bar-fill.stressed {
  background: var(--accent);
  opacity: 0.7;
}

.bar-fill.low {
  background: var(--dim);
  opacity: 0.8;
}

.sig-dir {
  font-family: var(--mono);
  font-size: 12px;
  width: 16px;
  flex-shrink: 0;
}

.sig-dir.up { color: var(--accent); }
.sig-dir.down { color: var(--dim); }

.state-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.state-label.degraded { color: var(--muted); }

.implication-block {
  background: rgba(200, 223, 245, 0.03);
  border: 1px solid var(--line);
  border-left: 2px solid rgba(200, 223, 245, 0.15);
  padding: 20px 24px;
  margin-bottom: 16px;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}

.node-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 20px;
}

@media (max-width: 680px) {
  .node-grid { grid-template-columns: 1fr; }
}

.node-block {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 18px 20px;
}

.node-title {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 14px;
}

.node-title::before {
  content: '→ ';
  color: var(--dim);
}

.node-state {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--dim);
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  line-height: 1.5;
}

.diagnostic-cta {
  border: 1px solid var(--line);
  padding: 28px 32px;
  margin-top: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.diagnostic-cta .cta-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 8px;
}

.diagnostic-cta p {
  margin: 0;
  max-width: 480px;
  font-size: 14px;
  color: var(--muted);
}

/* ── Desk / Contact ── */

.desk-block {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 2;
  color: var(--muted);
}

.desk-block .label {
  font-size: 10px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 4px;
  margin-top: 28px;
}

.desk-block .label:first-child { margin-top: 0; }

.desk-block a {
  color: var(--accent);
  text-decoration: none;
}

.desk-block a:hover { text-decoration: underline; }

.desk-note {
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--dim);
  line-height: 1.7;
}

/* ── Footer ── */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 20px 0;
  margin-top: 80px;
}

.site-footer .inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-footer span {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--dim);
}

.site-footer a {
  color: var(--dim);
  text-decoration: none;
}

.site-footer a:hover { color: var(--muted); }

@media (max-width: 600px) {
  h1 { font-size: 24px; }
  .topnav { display: none; }
  .signal-row { flex-wrap: wrap; }
  .sig-name { width: 100%; }
  .diagnostic-cta { flex-direction: column; }
}

/* ── Diagnostic Form ── */

.form-section {
  padding: 40px 0;
  border-bottom: 1px solid var(--line);
}

.form-section:last-of-type { border-bottom: none; }

.form-section-title {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.form-section-title span {
  color: var(--muted);
  margin-left: 12px;
  letter-spacing: .1em;
}

.check-group {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px 24px;
}

.check-group.three-col {
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 600px) {
  .check-group, .check-group.three-col { grid-template-columns: 1fr; }
}

.check-item {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  padding: 6px 0;
}

.check-item input[type="checkbox"],
.check-item input[type="radio"] {
  appearance: none;
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border: 1px solid var(--dim);
  border-radius: 1px;
  background: transparent;
  flex-shrink: 0;
  cursor: pointer;
  position: relative;
  transition: border-color 0.15s;
}

.check-item input[type="radio"] {
  border-radius: 50%;
}

.check-item input[type="checkbox"]:checked,
.check-item input[type="radio"]:checked {
  border-color: var(--accent);
  background: rgba(200, 223, 245, 0.1);
}

.check-item input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  top: 2px; left: 4px;
  width: 4px; height: 7px;
  border: 1px solid var(--accent);
  border-top: none; border-left: none;
  transform: rotate(45deg);
}

.check-item input[type="radio"]:checked::after {
  content: '';
  position: absolute;
  top: 3px; left: 3px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.check-item label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
  cursor: pointer;
  line-height: 1.4;
}

.check-item:hover label { color: var(--text); }
.check-item:hover input { border-color: var(--muted); }

.check-subgroup {
  margin-bottom: 24px;
}

.check-subgroup-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 10px;
}

.form-text-input {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 12px 14px;
  color: var(--text);
  font-family: var(--mono);
  font-size: 13px;
  outline: none;
  transition: border-color 0.15s;
}

.form-text-input:focus { border-color: var(--muted); }
.form-text-input::placeholder { color: var(--dim); }

textarea.form-text-input {
  resize: vertical;
  min-height: 60px;
}

.radio-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

/* ── Commercial Block (Diagnostic Page) ── */

.commercial-block {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 32px 36px;
  margin: 32px 0;
}

.commercial-header {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--dim);
  border-bottom: 1px solid var(--line);
  padding-bottom: 16px;
  margin-bottom: 24px;
}

.commercial-fee {
  font-family: var(--mono);
  font-size: 28px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -.02em;
  margin-bottom: 4px;
}

.commercial-meta {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--dim);
  letter-spacing: .08em;
  margin-bottom: 24px;
}

.commercial-specs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

@media (max-width: 600px) {
  .commercial-specs { grid-template-columns: 1fr; }
}

.spec-item {
  font-family: var(--mono);
  font-size: 11px;
}

.spec-label {
  color: var(--dim);
  font-size: 10px;
  letter-spacing: .14em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.spec-value {
  color: var(--muted);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 28px;
}

/* ── Internal Review Block ── */

.internal-review-block {
  border: 1px solid var(--line);
  border-left: 2px solid rgba(200, 223, 245, 0.12);
  padding: 20px 24px;
  margin-top: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.internal-review-block .irb-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 6px;
}

.internal-review-block p {
  font-size: 13px;
  color: var(--muted);
  margin: 0;
}

/* ── Briefing / Technical Document ── */

.brief-index {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 24px 28px;
  margin: 32px 0;
}

.brief-index-title {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 16px;
}

.brief-index ol {
  margin: 0;
  padding-left: 20px;
  list-style: decimal;
}

.brief-index li {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
  padding: 3px 0;
}

.brief-index li a {
  color: var(--muted);
  text-decoration: none;
}

.brief-index li a:hover { color: var(--accent); }

.brief-section {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}

.brief-section:last-of-type { border-bottom: none; }

.brief-section-num {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 8px;
}

.brief-section h2 {
  font-size: 20px;
  font-weight: 400;
  color: var(--text);
  margin: 0 0 20px;
}

.brief-section p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
  margin-bottom: 14px;
  max-width: 600px;
}

.does-list {
  margin: 16px 0;
  padding: 0;
  list-style: none;
}

.does-list li {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
  padding: 5px 0;
  padding-left: 20px;
  position: relative;
}

.does-list.yes li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--up);
}

.does-list.no li::before {
  content: '×';
  position: absolute;
  left: 0;
  color: var(--dim);
}

.example-synopsis {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 28px 32px;
  margin: 24px 0;
}

.synopsis-header {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.synopsis-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.synopsis-meta-item {
  font-family: var(--mono);
  font-size: 11px;
}

.synopsis-meta-label {
  color: var(--dim);
  font-size: 10px;
  letter-spacing: .14em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.synopsis-meta-value {
  color: var(--muted);
  letter-spacing: .04em;
}

.brief-questions {
  margin: 16px 0;
  padding: 0;
  list-style: none;
}

.brief-questions li {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
  padding: 5px 0;
  padding-left: 16px;
  position: relative;
}

.brief-questions li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--dim);
}

.report-structure {
  margin: 16px 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
  border: 1px solid var(--line);
}

.report-page {
  background: var(--surface);
  padding: 14px 20px;
  display: flex;
  gap: 20px;
  align-items: baseline;
}

.report-page-num {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .1em;
  color: var(--dim);
  flex-shrink: 0;
  width: 60px;
}

.report-page-title {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--text);
  text-transform: uppercase;
}

.report-page-desc {
  font-size: 12px;
  color: var(--dim);
  margin-top: 3px;
}

.engagement-block {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 28px 32px;
  margin-top: 16px;
}

.engagement-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 12px;
}

.engagement-row:last-child { border-bottom: none; }

.engagement-key { color: var(--dim); letter-spacing: .1em; text-transform: uppercase; font-size: 10px; }
.engagement-val { color: var(--muted); }

/* ── Theme Toggle Button ── */

.theme-toggle-btn {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--muted);
  cursor: pointer;
  padding: 5px 12px;
  border-radius: 2px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .08em;
  transition: all 0.15s;
  outline: none;
  margin-left: 8px;
}

.theme-toggle-btn:hover {
  border-color: var(--muted);
  color: var(--text);
  background: rgba(200, 223, 245, 0.05);
}

html:not(.light-theme) .theme-sun { display: inline; }
html:not(.light-theme) .theme-moon { display: none; }

html.light-theme .theme-sun { display: none; }
html.light-theme .theme-moon { display: inline; }

html.light-theme .action-link.inverse {
  background: #111111;
  color: #ffffff;
  border-color: #111111;
}

html.light-theme .action-link.inverse:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}