:root {
  color-scheme: dark;
  --limina-ground: #150D09;
  --limina-ground-edge: #241410;
  --limina-terracotta: #DD9962;
  --limina-amber: #CE9060;
  --limina-glow: #C97B43;
  --limina-ink-hi: #EDE0CE;
  --limina-ink-mid: #C0A48D;
  --limina-ink-muted: #9C8873;
  --limina-rule: rgba(221, 153, 98, 0.28);
  --limina-rule-faint: rgba(221, 153, 98, 0.14);
  --limina-panel: #1C110B;
  --limina-panel-deep: #180E08;
  --limina-ember-hi: #F2C795; /* sacred line only */
  --font-serif: "Playfair Display", Georgia, serif;
  --font-sans: "Lato", -apple-system, BlinkMacSystemFont, sans-serif;
}

html { scroll-behavior: smooth; }

html, body {
  margin: 0;
  padding: 0;
  background:
    radial-gradient(ellipse 1100px 640px at 50% -12%, var(--limina-ground-edge), transparent 62%),
    radial-gradient(ellipse 900px 500px at 85% 105%, rgba(36, 20, 16, 0.75), transparent 60%),
    var(--limina-ground);
  color: var(--limina-ink-mid);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 22px;
}

a { color: var(--limina-terracotta); text-underline-offset: 3px; }
a:focus-visible {
  outline: 2px solid var(--limina-terracotta);
  outline-offset: 3px;
  border-radius: 2px;
}

.crumb {
  padding-top: 30px;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
}
.crumb a { color: var(--limina-ink-muted); text-decoration: none; }
.crumb a:hover { color: var(--limina-terracotta); }
.crumb .sep { color: rgba(156, 136, 115, 0.5); margin: 0 0.35rem; }

/* ---------- Hero ---------- */
.hero {
  padding: 58px 0 10px;
  position: relative;
}
.kicker {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--limina-amber);
  margin: 0 0 1.5rem;
}
.kicker::before {
  content: "";
  width: 34px;
  height: 1px;
  background: var(--limina-glow);
  flex-shrink: 0;
}
.hero h1 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(2.9rem, 8vw, 4.6rem);
  line-height: 1.06;
  color: var(--limina-ink-hi);
  margin: 0 0 1.1rem;
  letter-spacing: 0.005em;
  text-wrap: balance;
}
.hook {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1.25rem, 3.2vw, 1.6rem);
  line-height: 1.45;
  color: var(--limina-amber);
  margin: 0 0 1.6rem;
  max-width: 36ch;
  text-wrap: balance;
}
.lede {
  max-width: 60ch;
  font-size: 1.1rem;
  margin: 0 0 2.1rem;
  color: var(--limina-ink-mid);
}
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 1.7rem;
}
.btn {
  display: inline-block;
  padding: 0.8rem 1.8rem;
  border-radius: 999px;
  text-decoration: none;
  font-family: var(--font-serif);
  font-size: 1.04rem;
  letter-spacing: 0.01em;
  transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}
.btn--primary {
  color: #1A0F08;
  background: linear-gradient(180deg, #E5A874, var(--limina-terracotta) 55%, #C9854E);
  border: 1px solid rgba(242, 199, 149, 0.55);
  font-weight: 500;
  box-shadow: 0 8px 26px rgba(201, 123, 67, 0.28), inset 0 1px 0 rgba(255, 248, 238, 0.35);
}
.btn--primary:hover {
  background: linear-gradient(180deg, #F0BC8C, #E5A163 55%, #D28F56);
  transform: translateY(-1px);
  box-shadow: 0 12px 32px rgba(201, 123, 67, 0.36), inset 0 1px 0 rgba(255, 248, 238, 0.4);
}
.btn--ghost {
  color: var(--limina-terracotta);
  border: 1px solid var(--limina-glow);
  background: rgba(221, 153, 98, 0.04);
}
.btn--ghost:hover { background: rgba(221, 153, 98, 0.1); border-color: var(--limina-terracotta); }

.status-line {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0;
  align-items: center;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--limina-ink-muted);
  margin: 0 0 2.4rem;
}
.status-line b { color: var(--limina-amber); font-weight: 700; }
.status-line .dot {
  margin: 0 0.75rem;
  width: 3px; height: 3px;
  border-radius: 50%;
  background: var(--limina-glow);
  flex-shrink: 0;
}

/* ---------- Board figure ---------- */
.board-figure {
  margin: 14px 0 0;
  padding: 0;
  border: 1px solid var(--limina-rule);
  border-radius: 20px;
  overflow: hidden;
  background: var(--limina-panel-deep);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.55), inset 0 1px 0 rgba(237, 224, 206, 0.06);
}
.board-figure svg { width: 100%; height: auto; display: block; }
.board-figure figcaption {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 1.2rem;
  padding: 0.8rem 1.4rem 0.9rem;
  border-top: 1px solid var(--limina-rule-faint);
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--limina-ink-muted);
  text-align: left;
}
.board-play {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-serif);
  font-size: 0.92rem;
  letter-spacing: 0.01em;
  text-transform: none;
  color: var(--limina-terracotta);
  background: rgba(221, 153, 98, 0.05);
  border: 1px solid var(--limina-glow);
  border-radius: 999px;
  padding: 0.45rem 1.1rem;
  cursor: pointer;
}
.board-play:hover { background: rgba(221, 153, 98, 0.12); border-color: var(--limina-terracotta); }
.board-play svg { width: 0.65rem; height: 0.65rem; display: block; }
.board-play[hidden] { display: none; }
@media (prefers-reduced-motion: reduce) {
  .board-play { display: none; }
}

/* ---------- Sections ---------- */
section.doc { padding: 72px 0 0; }
.section-kicker {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--limina-ink-muted);
  margin: 0 0 1rem;
}
.section-kicker::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--limina-rule);
  flex-shrink: 0;
}
section.doc > h2 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.7rem, 4.4vw, 2.3rem);
  line-height: 1.2;
  color: var(--limina-ink-hi);
  margin: 0 0 1.6rem;
  text-wrap: balance;
}
.section-intro { max-width: 62ch; margin: -0.5rem 0 1.8rem; font-size: 1rem; }

/* ---------- Evidence ledger ---------- */
.ledger { display: flex; flex-direction: column; gap: 0; border: 1px solid var(--limina-rule); border-radius: 18px; overflow: hidden; background: var(--limina-panel); }
.ledger-group { padding: 1.65rem 1.8rem 1.7rem; }
.ledger-group + .ledger-group { border-top: 1px solid var(--limina-rule-faint); }
.ledger-group h3 {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin: 0 0 0.85rem;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}
.ledger-group h3 .tier {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem; height: 1.5rem;
  border-radius: 50%;
  border: 1px solid var(--limina-rule);
  font-size: 0.68rem;
  letter-spacing: 0;
  flex-shrink: 0;
}
.ledger-group--known h3 { color: var(--limina-ink-hi); }
.ledger-group--known h3 .tier { background: rgba(237, 224, 206, 0.1); }
.ledger-group--inferred h3 { color: var(--limina-amber); }
.ledger-group--modern h3 { color: var(--limina-ink-muted); }
.ledger-group ul { margin: 0; padding-left: 1.25rem; }
.ledger-group li { margin-bottom: 0.45rem; font-size: 0.98rem; }
.ledger-group li::marker { color: var(--limina-glow); }
.ledger-group li:last-child { margin-bottom: 0; }
.ledger-note { font-size: 0.86rem; color: var(--limina-ink-muted); margin: 0.7rem 0 0; }

.claim {
  margin: 30px 0 0;
  padding: 1.7rem 1.9rem;
  border: 1px solid var(--limina-rule);
  border-left: 3px solid var(--limina-glow);
  background:
    radial-gradient(ellipse 60% 100px at 0% 50%, rgba(201, 123, 67, 0.1), transparent 70%),
    var(--limina-panel);
  border-radius: 0 16px 16px 0;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.12rem;
  line-height: 1.65;
  color: var(--limina-ink-hi);
}

/* ---------- Guided playthrough ---------- */
.playthrough-note {
  max-width: 62ch;
  margin: -0.5rem 0 2rem;
  font-size: 0.92rem;
  color: var(--limina-ink-muted);
}
.steps { display: flex; flex-direction: column; gap: 14px; }
.step {
  display: grid;
  grid-template-columns: 268px 1fr;
  gap: 1.5rem;
  align-items: center;
  border: 1px solid var(--limina-rule);
  border-radius: 16px;
  background: var(--limina-panel);
  padding: 1.35rem 1.6rem;
}
.step-diagram {
  border: 1px solid var(--limina-rule-faint);
  border-radius: 12px;
  background: var(--limina-panel-deep);
  padding: 0.8rem;
}
.step-diagram svg { width: 100%; height: auto; display: block; }
.step-copy { min-width: 0; }
.step-copy .step-tag {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  margin: 0 0 0.5rem;
}
.step-copy .step-num {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--limina-glow);
}
.step-copy h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.25rem;
  color: var(--limina-ink-hi);
  margin: 0;
}
.step-copy p { margin: 0; font-size: 0.96rem; }
.step-copy .tested {
  display: block;
  margin-top: 0.55rem;
  font-size: 0.82rem;
  color: var(--limina-ink-muted);
  font-variant-numeric: tabular-nums;
}
.step--question { border-left: 3px solid var(--limina-glow); }
@media (max-width: 640px) {
  .step { grid-template-columns: 1fr; }
  .step-diagram { max-width: 300px; margin: 0 auto; }
}

/* ---------- Sources ---------- */
.sources { list-style: none; margin: 0; padding: 0; border: 1px solid var(--limina-rule); border-radius: 18px; overflow: hidden; background: var(--limina-panel); }
.sources li { padding: 1.35rem 1.8rem; }
.sources li + li { border-top: 1px solid var(--limina-rule-faint); }
.sources .src-title {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.08rem;
  color: var(--limina-ink-hi);
}
.sources .src-meta { display: block; font-size: 0.9rem; margin-top: 0.3rem; }
.sources .src-claim { display: block; font-size: 0.88rem; color: var(--limina-ink-muted); margin-top: 0.4rem; }

/* ---------- Engine records ---------- */
.record {
  border: 1px solid var(--limina-rule);
  border-radius: 18px;
  background: var(--limina-panel);
  margin-bottom: 18px;
  overflow: hidden;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.35);
}
.record-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.6rem 1rem;
  padding: 1.5rem 1.8rem 0;
}
.record-id {
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.24em;
  color: var(--limina-glow);
}
.record-head h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.45rem;
  color: var(--limina-ink-hi);
  margin: 0;
  flex-grow: 1;
}
.record-status {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  border: 1px solid var(--limina-rule);
  border-radius: 999px;
  padding: 0.3rem 0.8rem;
  white-space: nowrap;
}
.record-status--live { color: #1A0F08; background: var(--limina-terracotta); border-color: var(--limina-terracotta); }
.record-status--rejected { color: var(--limina-ink-muted); }
.record-status--held { color: var(--limina-amber); }

.record-body {
  display: grid;
  grid-template-columns: 236px 1fr;
  gap: 1.5rem;
  padding: 1.25rem 1.8rem 1.4rem;
  align-items: start;
}
.record-diagram {
  border: 1px solid var(--limina-rule-faint);
  border-radius: 12px;
  background: var(--limina-panel-deep);
  padding: 0.9rem 0.9rem 0.55rem;
}
.record-diagram svg { width: 100%; height: auto; display: block; }
.record-diagram figcaption {
  margin-top: 0.5rem;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--limina-ink-muted);
  text-align: center;
  line-height: 1.5;
}
.record-attempt { margin: 0; font-size: 0.99rem; }
.record-attempt .lbl {
  display: block;
  font-size: 0.73rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--limina-ink-muted);
  margin-bottom: 0.35rem;
}

.record details { border-top: 1px solid var(--limina-rule-faint); }
.record summary {
  list-style: none;
  cursor: pointer;
  padding: 0.95rem 1.8rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--limina-terracotta);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.record summary::-webkit-details-marker { display: none; }
.record summary::after {
  content: "";
  width: 0.5rem; height: 0.5rem;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  transition: transform 0.2s ease;
}
.record details[open] summary::after { transform: rotate(-135deg) translateY(-2px); }
.record summary:hover { color: var(--limina-ink-hi); background: rgba(221, 153, 98, 0.05); }
.record summary .closed-label { display: inline; }
.record summary .open-label { display: none; }
.record details[open] summary .closed-label { display: none; }
.record details[open] summary .open-label { display: inline; }

.record-detail { padding: 0.3rem 1.8rem 1.6rem; }
.record-detail dl { margin: 0; }
.record-detail dt {
  font-size: 0.73rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--limina-ink-muted);
  margin-top: 1rem;
}
.record-detail dd { margin: 0.2rem 0 0; font-size: 0.97rem; }
.record .figures {
  margin: 1.3rem 0 0;
  padding-top: 1rem;
  border-top: 1px dashed var(--limina-rule-faint);
  font-size: 0.88rem;
  color: var(--limina-ink-muted);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* How it plays, per engine */
.hiw-label {
  font-size: 0.73rem;
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--limina-ink-muted);
  margin: 0 0 0.8rem;
}
.record-hiw { padding: 1.2rem 1.8rem 0.3rem; }
.hiw-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 12px;
}
.hiw-step {
  margin: 0;
  border: 1px solid var(--limina-rule-faint);
  border-radius: 12px;
  background: var(--limina-panel-deep);
  padding: 0.75rem 0.8rem 0.9rem;
}
.hiw-step svg { width: 100%; height: auto; display: block; }
.hiw-step figcaption {
  font-size: 0.83rem;
  line-height: 1.55;
  color: var(--limina-ink-mid);
  margin-top: 0.6rem;
}
.hiw-step figcaption b {
  display: block;
  color: var(--limina-ink-hi);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 0.3rem;
}
.hiw-step .tested {
  display: block;
  margin-top: 0.4rem;
  font-size: 0.76rem;
  color: var(--limina-ink-muted);
  font-variant-numeric: tabular-nums;
}
.record-anim {
  margin: 1rem 0 1rem;
  border: 1px solid var(--limina-rule-faint);
  border-radius: 12px;
  background: var(--limina-panel-deep);
  padding: 0.9rem 0.9rem 0.8rem;
}
.record-anim > svg { width: 100%; max-width: 480px; height: auto; display: block; margin: 0 auto; }
.record-anim-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem 1rem;
  margin-top: 0.7rem;
}
.record-anim-cap {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.92rem;
  color: var(--limina-amber);
  min-height: 1.3em;
  margin: 0;
}
.record-anim--link {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.6rem 1rem;
}
.record-anim--link span { font-size: 0.92rem; color: var(--limina-ink-mid); }
.board-play--small { padding: 0.42rem 1rem; font-size: 0.88rem; }

/* Bridge between the control engine and the capture engines */
.record-bridge {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 1.4rem;
  align-items: center;
  border: 1px solid var(--limina-rule);
  border-left: 3px solid var(--limina-glow);
  border-radius: 16px;
  background:
    radial-gradient(ellipse 60% 100px at 0% 50%, rgba(201, 123, 67, 0.08), transparent 70%),
    var(--limina-panel);
  padding: 1.3rem 1.6rem;
  margin: 6px 0 18px;
}
.record-bridge .bridge-diagram {
  border: 1px solid var(--limina-rule-faint);
  border-radius: 12px;
  background: var(--limina-panel-deep);
  padding: 0.8rem;
}
.record-bridge svg { width: 100%; height: auto; display: block; }
.record-bridge h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.25rem;
  color: var(--limina-ink-hi);
  margin: 0 0 0.45rem;
}
.record-bridge p { margin: 0; font-size: 0.96rem; }
@media (max-width: 640px) {
  .record-bridge { grid-template-columns: 1fr; }
  .record-bridge .bridge-diagram { max-width: 280px; margin: 0 auto; }
}

/* ---------- Findings ---------- */
.findings-empty {
  border: 1px dashed var(--limina-rule);
  border-radius: 16px;
  padding: 1.7rem 1.8rem;
  color: var(--limina-ink-muted);
  font-size: 0.99rem;
  background: rgba(28, 17, 11, 0.5);
}

/* ---------- Field edition ---------- */
.edition {
  border: 1px solid var(--limina-rule);
  border-radius: 18px;
  background:
    radial-gradient(ellipse 70% 140px at 50% 118%, rgba(201, 123, 67, 0.16), transparent 70%),
    var(--limina-panel);
  padding: 1.9rem 1.9rem 1.8rem;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.35);
}
.concept-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--limina-amber);
  border: 1px solid var(--limina-rule);
  border-radius: 999px;
  padding: 0.3rem 0.8rem;
  margin-bottom: 1.1rem;
}
.edition > p { margin: 0 0 0.5rem; }
.edition ul { margin: 0.5rem 0 1.7rem; padding-left: 1.25rem; }
.edition li { margin-bottom: 0.35rem; font-size: 0.98rem; }
.edition li::marker { color: var(--limina-glow); }
.price-test { border: 0; margin: 0; padding: 1.3rem 0 0; border-top: 1px solid var(--limina-rule-faint); }
.price-test legend { float: left; width: 100%; font-family: var(--font-serif); font-size: 1.05rem; color: var(--limina-ink-hi); padding: 0; margin-bottom: 1rem; }
.price-options { display: flex; flex-wrap: wrap; gap: 10px; clear: both; }
.price-options button {
  font-family: var(--font-sans);
  font-size: 0.98rem;
  padding: 0.65rem 1.45rem;
  border-radius: 999px;
  border: 1px solid var(--limina-rule);
  background: rgba(221, 153, 98, 0.04);
  color: var(--limina-ink-mid);
}
.price-options button:disabled { opacity: 0.55; cursor: not-allowed; }
.price-note { margin: 1rem 0 0; font-size: 0.85rem; color: var(--limina-ink-muted); }

/* ---------- Related ---------- */
.related-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}
.related-cards .card {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  border: 1px solid var(--limina-rule);
  border-radius: 16px;
  background: var(--limina-panel);
  padding: 1.5rem 1.6rem;
  text-decoration: none;
  color: inherit;
}
.related-cards a.card { transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease; }
.related-cards a.card:hover {
  transform: translateY(-3px);
  border-color: rgba(221, 153, 98, 0.5);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
}
.related-cards .status {
  align-self: flex-start;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--limina-amber);
  border: 1px solid var(--limina-rule);
  border-radius: 999px;
  padding: 0.26rem 0.72rem;
}
.related-cards h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.3rem;
  color: var(--limina-ink-hi);
  margin: 0;
}
.related-cards p { margin: 0; font-size: 0.92rem; }
.related-note { font-size: 0.85rem; color: var(--limina-ink-muted); margin-top: 1rem; }

.colophon {
  border-top: 1px solid var(--limina-rule);
  margin-top: 84px;
  padding: 28px 0 48px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--limina-ink-muted);
}
.colophon a { color: var(--limina-ink-muted); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, a.card, .record summary::after { transition: none; }
  .btn--primary:hover, .related-cards a.card:hover { transform: none; }
}
@media (max-width: 640px) {
  .record-body { grid-template-columns: 1fr; }
  .record-diagram { max-width: 300px; margin: 0 auto; }
}