:root {
  --navy: #001c64;
  --blue: #003087;
  --bright: #0070e0;
  --sky: #d9efff;
  --ink: #071634;
  --muted: #53627a;
  --line: #d9e5f3;
  --paper: #ffffff;
  --wash: #eef5ff;
  --green: #047857;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--wash);
  color: var(--ink);
  font-family: Inter, Arial, sans-serif;
  font-weight: 600;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  align-items: center;
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 20px;
  grid-template-columns: auto minmax(0, 1fr) auto;
  min-height: 78px;
  padding: 0 42px;
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand,
.account,
.nav-links {
  align-items: center;
  display: flex;
}

.brand {
  color: var(--ink);
  font-weight: 900;
  gap: 10px;
}

.brand-mark {
  align-items: center;
  background: var(--blue);
  border-radius: 999px;
  color: white;
  display: inline-flex;
  font-size: 0.72rem;
  height: 32px;
  justify-content: center;
  width: 32px;
}

.nav-links {
  background: #f4f9ff;
  border: 1px solid var(--line);
  border-radius: 999px;
  gap: 4px;
  justify-self: center;
  padding: 5px;
}

.nav-links a {
  border-radius: 999px;
  color: #30425f;
  font-size: 0.84rem;
  font-weight: 900;
  padding: 9px 13px;
}

.nav-links a:hover {
  background: white;
  color: var(--blue);
}

.account {
  color: #45546d;
  font-size: 0.84rem;
  gap: 14px;
  justify-content: flex-end;
}

.button {
  align-items: center;
  background: var(--blue);
  border: 1px solid var(--blue);
  border-radius: 999px;
  color: white;
  display: inline-flex;
  font-size: 0.95rem;
  font-weight: 900;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  transition: transform 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.button:hover {
  background: #00246d;
  box-shadow: 0 14px 28px rgba(0, 48, 135, 0.18);
  transform: translateY(-1px);
}

.button-secondary {
  background: white;
  color: var(--blue);
}

.button-small {
  font-size: 0.82rem;
  min-height: 38px;
  padding: 0 16px;
}

.hero,
.split-section,
.ecosystem-section,
.roadmap-section,
.page-hero,
.layers-section,
.rule-section,
.cartridge-section,
.template-section,
.validator-section,
.source-section,
.adapter-section,
.api-section,
.statement-band {
  margin: 28px auto 0;
  max-width: 1180px;
  padding: 0 24px;
}

.hero {
  align-items: stretch;
  display: grid;
  gap: 22px;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.7fr);
}

.hero-content,
.hero-proof,
.split-section,
.ecosystem-section,
.roadmap-section,
.page-hero,
.layers-section,
.rule-section,
.cartridge-section,
.template-section,
.validator-section,
.source-section,
.adapter-section,
.api-section {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 24px 60px rgba(0, 48, 135, 0.08);
}

.hero-content {
  padding: clamp(42px, 6vw, 78px);
}

.hero-proof {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 34px;
}

.eyebrow {
  color: var(--bright);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  margin: 0 0 12px;
  text-transform: uppercase;
}

.eyebrow.light {
  color: #bfe5ff;
}

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

h1 {
  color: var(--blue);
  font-size: clamp(3.4rem, 8vw, 7.2rem);
  letter-spacing: 0;
  line-height: 0.9;
  margin-bottom: 24px;
  max-width: 900px;
}

h2 {
  color: var(--blue);
  font-size: clamp(2rem, 4vw, 4rem);
  letter-spacing: 0;
  line-height: 1;
  margin-bottom: 18px;
}

h3 {
  color: var(--blue);
  font-size: 1.08rem;
  line-height: 1.2;
  margin-bottom: 8px;
}

p {
  color: var(--muted);
  line-height: 1.65;
}

.hero-lede {
  font-size: 1.22rem;
  max-width: 760px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.proof-label,
.equation-label {
  color: var(--bright);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.74rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-proof ol {
  counter-reset: proof;
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
}

.hero-proof li {
  align-items: center;
  border-top: 1px solid var(--line);
  color: var(--blue);
  display: flex;
  font-size: 1.05rem;
  font-weight: 900;
  gap: 12px;
  padding: 16px 0;
}

.hero-proof li::before {
  align-items: center;
  background: var(--sky);
  border-radius: 999px;
  color: var(--blue);
  content: counter(proof);
  counter-increment: proof;
  display: inline-flex;
  flex: 0 0 30px;
  height: 30px;
  justify-content: center;
}

.statement-band {
  background: var(--blue);
  border-radius: 8px;
  box-shadow: 0 24px 60px rgba(0, 48, 135, 0.14);
  padding: clamp(34px, 5vw, 62px);
}

.statement-band h2,
.statement-band p {
  color: white;
}

.statement-band p {
  color: #d9e9ff;
  max-width: 860px;
}

.split-section,
.ecosystem-section,
.roadmap-section,
.page-hero,
.layers-section,
.rule-section,
.cartridge-section,
.template-section,
.validator-section,
.source-section,
.adapter-section,
.api-section {
  padding: clamp(32px, 5vw, 58px);
}

.split-section {
  align-items: center;
  display: grid;
  gap: 34px;
  grid-template-columns: minmax(0, 1fr) minmax(330px, 0.9fr);
}

.compact-stack {
  display: grid;
  gap: 10px;
}

.compact-stack a {
  align-items: center;
  background: #f8fbff;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 12px;
  grid-template-columns: 50px minmax(0, 1fr);
  padding: 14px;
}

.compact-stack span,
.layer-id,
.family-grid article > span,
.api-list article > span {
  align-items: center;
  background: var(--blue);
  border-radius: 999px;
  color: white;
  display: inline-flex;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.78rem;
  font-weight: 900;
  height: 36px;
  justify-content: center;
  width: 42px;
}

.compact-stack strong {
  color: var(--blue);
}

.compact-stack small {
  color: var(--muted);
  grid-column: 2;
}

.section-heading {
  margin-bottom: 28px;
  max-width: 820px;
}

.card-grid,
.rule-grid,
.family-grid,
.rejection-grid,
.api-list,
.cartridge-grid {
  display: grid;
  gap: 14px;
}

.card-grid {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card-grid article,
.rule-grid article,
.family-grid article,
.rejection-grid article,
.api-list article,
.cartridge-card {
  background: #f8fbff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
}

.card-grid span,
.card-topline span {
  color: var(--bright);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.78rem;
  font-weight: 900;
}

.roadmap {
  display: grid;
  gap: 12px;
}

.roadmap article,
.layer-list article {
  background: #f8fbff;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(92px, 0.18fr) minmax(0, 1fr) minmax(220px, 0.45fr);
  padding: 20px;
}

.roadmap span,
.roadmap strong {
  color: var(--blue);
  font-weight: 900;
}

.layer-list {
  display: grid;
  gap: 12px;
}

.layer-id {
  height: 44px;
  width: 52px;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.meta-row span {
  background: white;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #31435e;
  font-size: 0.78rem;
  font-weight: 900;
  padding: 7px 10px;
}

.layer-list aside {
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
}

.layer-list aside strong {
  color: var(--blue);
}

.rule-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.rule-grid article {
  color: var(--blue);
  font-size: 1.05rem;
  font-weight: 900;
  line-height: 1.4;
}

.cartridge-grid {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.card-topline {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin-bottom: 16px;
}

.card-topline strong,
.family-grid strong {
  background: #e8f4ff;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--blue);
  font-size: 0.76rem;
  padding: 6px 10px;
  text-transform: uppercase;
}

.coverage-grid {
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 18px 0;
}

.coverage-grid div {
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
  min-height: 82px;
  padding: 12px;
}

.coverage-grid span {
  color: var(--bright);
  display: block;
  font-size: 0.74rem;
  font-weight: 900;
  margin-bottom: 6px;
  text-transform: uppercase;
}

.coverage-grid strong {
  color: var(--blue);
  font-size: 0.88rem;
  line-height: 1.35;
}

.note,
.attempt,
.template-range {
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
}

.family-grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.family-grid article > span {
  margin-bottom: 16px;
}

.rejection-grid {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.process-list {
  background: #f8fbff;
  border: 1px solid var(--line);
  border-radius: 8px;
  margin: 0;
  padding: 24px 24px 24px 44px;
}

.process-list li {
  color: var(--muted);
  line-height: 1.55;
  margin: 10px 0;
}

.formula-card,
.adapter-equation {
  background: linear-gradient(135deg, #f7fbff, #e8f4ff);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px;
}

.formula-card strong,
.adapter-equation strong {
  color: var(--blue);
  display: block;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: clamp(1.3rem, 2.5vw, 2.15rem);
  line-height: 1.25;
  margin: 14px 0;
  overflow-wrap: anywhere;
}

.adapter-equation {
  align-items: center;
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  margin-bottom: 20px;
}

.adapter-equation span {
  color: var(--bright);
  font-size: 2rem;
  font-weight: 900;
}

.api-list {
  grid-template-columns: 1fr;
}

.api-list article {
  align-items: center;
  display: grid;
  gap: 18px;
  grid-template-columns: 72px minmax(0, 0.62fr) minmax(280px, 1fr);
}

.api-list h2 {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: clamp(1.2rem, 2.2vw, 2rem);
  margin-bottom: 0;
  overflow-wrap: anywhere;
}

.api-list p {
  margin-bottom: 0;
}

.site-footer {
  align-items: center;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  margin: 28px auto 0;
  max-width: 1180px;
  padding: 36px 24px 52px;
}

.site-footer p {
  font-size: 0.92rem;
  margin: 6px 0 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links a {
  color: var(--blue);
  font-weight: 900;
}

@media (max-width: 1040px) {
  .site-header {
    grid-template-columns: 1fr;
    padding: 18px 22px;
  }

  .account,
  .brand,
  .nav-links {
    justify-content: center;
  }

  .nav-links {
    border-radius: 8px;
    flex-wrap: wrap;
  }

  .hero,
  .split-section,
  .roadmap article,
  .layer-list article,
  .adapter-equation,
  .api-list article {
    grid-template-columns: 1fr;
  }

  .rule-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .account {
    flex-direction: column;
  }

  .hero,
  .split-section,
  .ecosystem-section,
  .roadmap-section,
  .page-hero,
  .layers-section,
  .rule-section,
  .cartridge-section,
  .template-section,
  .validator-section,
  .source-section,
  .adapter-section,
  .api-section,
  .statement-band {
    margin-top: 14px;
  }

  .coverage-grid {
    grid-template-columns: 1fr;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 18px;
  }
}

/* Public architecture/governance banner (shown to visitors without a session). */
.public-note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 12px 24px;
  margin: 0 auto;
  max-width: 1120px;
  font-size: 0.92rem;
  line-height: 1.4;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
}
.public-note span {
  opacity: 0.85;
}