:root {
  --font-display: "Avenir Next Condensed", "Arial Narrow", sans-serif;
  --font-body: "Avenir Next", "Segoe UI", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, monospace;
  --bg: #f1f7f7;
  --surface: #fbfdfd;
  --surface-strong: #dce8e9;
  --fg: #172b31;
  --muted: #52686e;
  --border: #758e93;
  --brand: #194f61;
  --brand-deep: #123b48;
  --accent: #eab52a;
  --accent-fg: #2c260b;
  --success: #18725b;
  --warning: #9d6500;
  --error: #a93428;
  --max: 72rem;
  --reading: 46rem;
  --shadow-line: 0 1px 0 rgba(23, 43, 49, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--fg);
  background:
    linear-gradient(rgba(25, 79, 97, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(25, 79, 97, 0.045) 1px, transparent 1px),
    var(--bg);
  background-size: 32px 32px;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
}

a {
  color: var(--brand);
  text-underline-offset: 0.2em;
  text-decoration-thickness: 0.08em;
}

a:hover {
  color: var(--brand-deep);
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

main:focus {
  outline: none;
}

img,
svg {
  display: block;
  max-width: 100%;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 0.9rem;
  color: var(--accent-fg);
  background: var(--accent);
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  background: rgba(251, 253, 253, 0.96);
  border-bottom: 1px solid var(--border);
}

.embed-header {
  display: flex;
  width: min(960px, calc(100% - 32px));
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin: 0 auto;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}
.embed-header p { max-width: 28rem; margin: 0; color: var(--muted); text-align: right; }
.embed-brand { display: flex; align-items: center; gap: 10px; color: var(--brand); font-weight: 800; }
.embed-brand img { width: 40px; height: 40px; }
.embed-content { max-width: 760px; margin: 0 auto; }
.embed-content section { scroll-margin-top: 20px; }

.header-inner,
.page-shell,
.site-footer-inner {
  width: min(calc(100% - 2rem), var(--max));
  margin-inline: auto;
}

.header-inner {
  min-height: 4.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--fg);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.brand img {
  width: 2.25rem;
  height: 2.25rem;
}

.site-nav ul,
.footer-nav,
.plain-list,
.meta-list,
.continuity-rail {
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav ul {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
}

.site-nav a {
  display: inline-block;
  padding: 0.55rem 0;
  color: var(--fg);
  font-size: 0.9rem;
  font-weight: 650;
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

.site-nav a[aria-current="page"],
.site-nav a:hover {
  border-color: var(--accent);
}

.page-shell {
  padding-block: 4.5rem 5rem;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(19rem, 0.82fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
  min-height: 32rem;
}

.eyebrow,
.kicker,
.status-label,
.rail-step,
.receipt-label,
.table-caption {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.eyebrow,
.kicker {
  color: var(--brand);
}

.hero h1,
.page-intro h1 {
  margin: 0.45rem 0 1.25rem;
  max-width: 12ch;
  font-family: var(--font-display);
  font-size: clamp(3.25rem, 9vw, 6.6rem);
  line-height: 0.9;
  letter-spacing: -0.035em;
}

.page-intro h1 {
  max-width: 17ch;
  font-size: clamp(2.8rem, 7vw, 5.2rem);
}

.lede {
  max-width: 42rem;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.3rem);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.button {
  min-height: 2.8rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1rem;
  border: 1px solid var(--brand);
  border-radius: 0.35rem;
  color: var(--surface);
  background: var(--brand);
  font: inherit;
  font-weight: 750;
  text-decoration: none;
  box-shadow: var(--shadow-line);
}

.button:hover {
  color: #fff;
  background: var(--brand-deep);
}

.button-accent {
  border-color: #c38e0c;
  color: var(--accent-fg);
  background: var(--accent);
}

.button-accent:hover {
  color: var(--accent-fg);
  background: #dca51c;
}

.button-quiet {
  color: var(--brand);
  background: transparent;
}

.button-quiet:hover {
  color: var(--surface);
}

.receipt-preview {
  position: relative;
  padding: 1.5rem;
  color: #edf7f5;
  background: var(--brand-deep);
  border: 1px solid #0d2d36;
  box-shadow: 0.75rem 0.75rem 0 var(--accent);
}

.receipt-preview::before {
  content: "";
  position: absolute;
  inset: 0.65rem;
  border: 1px solid rgba(241, 247, 247, 0.2);
  pointer-events: none;
}

.receipt-preview > * {
  position: relative;
}

.receipt-preview h2 {
  margin: 0.25rem 0 1rem;
  font-family: var(--font-display);
  font-size: 2.2rem;
  line-height: 1;
}

.verified {
  color: #84e5c6;
}

.receipt-lines {
  display: grid;
  gap: 0;
  margin-top: 1.3rem;
  border-top: 1px solid rgba(241, 247, 247, 0.28);
}

.receipt-line {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 1rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid rgba(241, 247, 247, 0.18);
  font-size: 0.9rem;
}

.receipt-line dt {
  color: #b5cbce;
}

.receipt-line dd {
  margin: 0;
  font-weight: 650;
}

.continuity {
  margin-block: 5rem;
  padding-block: 1.5rem;
  border-block: 1px solid var(--border);
  background: rgba(251, 253, 253, 0.72);
}

.continuity-rail {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  counter-reset: stage;
}

.continuity-rail li {
  position: relative;
  min-height: 5.5rem;
  padding: 2.1rem 1rem 0.75rem;
  border-right: 1px solid var(--border);
  counter-increment: stage;
}

.continuity-rail li:last-child {
  border-right: 0;
}

.continuity-rail li::before {
  content: "0" counter(stage);
  position: absolute;
  top: 0;
  left: 1rem;
  color: var(--brand);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 800;
}

.continuity-rail strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.35rem;
}

.continuity-rail span {
  display: block;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.4;
}

.section {
  margin-block: 5rem;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(18rem, 1.28fr);
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.section h2,
.content-prose h2 {
  margin: 0.35rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(2.3rem, 5vw, 3.9rem);
  line-height: 1;
}

.content-prose {
  min-width: 0;
  overflow-wrap: anywhere;
}

.section-heading p {
  max-width: 48rem;
  margin: 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(17rem, 0.85fr);
  gap: 2rem;
}

.ledger,
.callout,
.support-card,
.scope-card {
  background: var(--surface);
  border: 1px solid var(--border);
}

.ledger-row {
  display: grid;
  grid-template-columns: 1.1fr 0.8fr 1fr;
  gap: 1rem;
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--surface-strong);
}

.ledger-row:last-child {
  border-bottom: 0;
}

.ledger-row:first-child {
  color: var(--muted);
  background: var(--surface-strong);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.ledger-decision {
  color: var(--success);
  font-weight: 750;
}

.callout,
.scope-card,
.support-card {
  padding: 1.4rem;
}

.callout {
  border-left: 0.45rem solid var(--accent);
}

.callout h3,
.scope-card h3,
.support-card h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.55rem;
}

.callout p,
.scope-card p,
.support-card p {
  margin: 0;
}

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

.scope-card {
  min-height: 13rem;
}

.scope-card .status-label {
  display: inline-block;
  margin-bottom: 1.5rem;
  color: var(--brand);
}

.scope-card.blocked .status-label {
  color: var(--error);
}

.scope-card.limited .status-label {
  color: var(--warning);
}

.page-intro {
  max-width: 58rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--border);
}

.page-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  margin-top: 1.5rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.content-layout {
  display: grid;
  grid-template-columns: 13rem minmax(0, var(--reading));
  gap: 3rem;
  margin-top: 3rem;
}

.toc {
  align-self: start;
  position: sticky;
  top: 1.5rem;
}

.toc strong {
  display: block;
  margin-bottom: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.toc a {
  display: block;
  padding: 0.35rem 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.content-prose h2 {
  margin-top: 3.6rem;
  padding-top: 0.5rem;
  font-size: 2.3rem;
}

.content-prose h2:first-child {
  margin-top: 0;
}

.content-prose h3 {
  margin-top: 2rem;
  font-family: var(--font-display);
  font-size: 1.45rem;
}

.content-prose p,
.content-prose li {
  max-width: 72ch;
}

.content-prose li + li {
  margin-top: 0.5rem;
}

.content-prose table {
  display: block;
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  margin-block: 1.25rem 2rem;
  background: var(--surface);
  font-size: 0.92rem;
}

.content-prose th,
.content-prose td {
  min-width: 10rem;
  padding: 0.75rem;
  text-align: left;
  vertical-align: top;
  overflow-wrap: normal;
  word-break: normal;
  border: 1px solid var(--border);
}

.content-prose th {
  background: var(--surface-strong);
}

.note,
.warning-note,
.success-note {
  margin-block: 1.5rem;
  padding: 1rem 1.1rem;
  border-left: 0.35rem solid var(--brand);
  background: var(--surface);
}

.warning-note {
  border-color: var(--warning);
}

.success-note {
  border-color: var(--success);
}

code {
  font-family: var(--font-mono);
  font-size: 0.88em;
}

.site-footer {
  color: #dbe9eb;
  background: var(--brand-deep);
  border-top: 0.35rem solid var(--accent);
}

.site-footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  padding-block: 2.2rem;
}

.site-footer p {
  max-width: 50rem;
  margin: 0;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
}

.site-footer a {
  color: #edf7f5;
}

.small {
  color: var(--muted);
  font-size: 0.87rem;
}

@media (max-width: 800px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    padding-block: 0.9rem;
  }

  .hero,
  .section-heading,
  .split,
  .content-layout,
  .site-footer-inner {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .receipt-preview {
    box-shadow: 0.45rem 0.45rem 0 var(--accent);
  }

  .continuity-rail {
    grid-template-columns: 1fr;
  }

  .continuity-rail li {
    min-height: auto;
    padding: 1rem 1rem 1rem 4rem;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .continuity-rail li::before {
    top: 1.1rem;
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .scope-card {
    min-height: auto;
  }

  .toc {
    position: static;
    padding-bottom: 1.2rem;
    border-bottom: 1px solid var(--border);
  }
}

@media (max-width: 500px) {
  .embed-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.5rem;
  }

  .embed-header p {
    text-align: left;
  }

  .page-shell {
    padding-block: 3rem 4rem;
  }

  .hero h1,
  .page-intro h1 {
    font-size: clamp(2.75rem, 17vw, 4.25rem);
  }

  .site-nav ul {
    gap: 0.25rem 0.75rem;
  }

  .ledger-row {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }

  .ledger-row:first-child {
    display: none;
  }

  .receipt-line {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}