:root {
  --ledger-paper: #eef3f2;
  --deep-signal: #123038;
  --verified-teal: #0c6b63;
  --verified-dark: #084d48;
  --boundary-copper: #b9672d;
  --quiet-mist: #d7e4e0;
  --stop-red: #9a3e3e;
  --white: #fbfdfc;
  --line: rgba(18, 48, 56, 0.2);
  --shadow: 0 22px 65px rgba(18, 48, 56, 0.12);
  --display: "DIN Alternate", "Avenir Next Condensed", "Arial Narrow", sans-serif;
  --body: "Avenir Next", Avenir, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --utility: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html {
  color: var(--deep-signal);
  background: var(--ledger-paper);
  font-family: var(--body);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    linear-gradient(rgba(18, 48, 56, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(18, 48, 56, 0.025) 1px, transparent 1px),
    var(--ledger-paper);
  background-size: 100% 28px, 28px 100%, auto;
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: var(--verified-dark); text-underline-offset: 0.18em; }
a:hover { color: var(--boundary-copper); }
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--boundary-copper);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  color: var(--white);
  background: var(--deep-signal);
  transform: translateY(-180%);
}
.skip-link:focus { transform: translateY(0); }

.preview-banner {
  padding: 8px 24px;
  color: var(--white);
  background: var(--stop-red);
  font: 700 0.72rem/1.3 var(--utility);
  letter-spacing: 0.06em;
  text-align: center;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1240px, calc(100% - 40px));
  min-height: 86px;
  margin: 0 auto;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 12px;
  color: var(--deep-signal);
  font-family: var(--display);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-decoration: none;
}
.brand > span:last-child { min-width: 0; overflow-wrap: anywhere; }

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: var(--white);
  background: var(--verified-teal);
  font: 800 0.72rem/1 var(--utility);
}

nav { display: flex; gap: clamp(14px, 2.3vw, 34px); }
nav a {
  position: relative;
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: var(--deep-signal);
  font-size: 0.84rem;
  font-weight: 650;
  text-decoration: none;
}
nav a[aria-current="page"]::after {
  position: absolute;
  right: 0;
  bottom: -10px;
  left: 0;
  height: 2px;
  background: var(--boundary-copper);
  content: "";
}

main,
.site-footer {
  width: min(1240px, calc(100% - 40px));
  margin: 0 auto;
}

.page-intro {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.page-intro > p:last-child { margin: 0; font-size: 0.88rem; }

.utility-label,
.proof-kicker {
  margin: 0;
  color: var(--verified-dark);
  font: 700 0.7rem/1.4 var(--utility);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-grid,
.page-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(290px, 0.7fr);
  gap: clamp(44px, 8vw, 110px);
  align-items: start;
  padding: clamp(64px, 9vw, 126px) 0;
}
.hero-copy,
.reading-column,
.boundary-rail { min-width: 0; }

.hero-copy h1,
.reading-column > h1,
.status-card h1 {
  max-width: 900px;
  margin: 18px 0 24px;
  font-family: var(--display);
  font-size: clamp(3.2rem, 7.5vw, 7.6rem);
  font-stretch: condensed;
  font-weight: 800;
  letter-spacing: -0.055em;
  line-height: 0.88;
  text-wrap: balance;
}

.reading-column > h1 { font-size: clamp(3rem, 6vw, 6.2rem); }
.hero-lede,
.lede {
  max-width: 760px;
  margin: 0 0 34px;
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
  line-height: 1.55;
}

.action-row { display: flex; flex-wrap: wrap; gap: 12px; }
.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border: 1px solid var(--deep-signal);
  font-size: 0.84rem;
  font-weight: 750;
  text-decoration: none;
}
.button.primary { color: var(--white); background: var(--deep-signal); }
.button.primary:hover { background: var(--verified-dark); }
.button.quiet { color: var(--deep-signal); background: transparent; }

.boundary-rail {
  position: sticky;
  top: 28px;
  padding: 24px;
  border: 1px solid var(--line);
  background: rgba(251, 253, 252, 0.82);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}
.boundary-step {
  position: relative;
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 14px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.boundary-step:last-child { border-bottom: 0; }
.boundary-step::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: -24px;
  width: 4px;
  background: var(--verified-teal);
  content: "";
}
.boundary-never::before { background: var(--stop-red); }
.boundary-step span { font: 700 0.7rem/1.4 var(--utility); text-transform: uppercase; }
.boundary-step strong { font-size: 0.92rem; line-height: 1.45; }

.proof-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.proof-strip article { min-height: 255px; padding: 34px; border-right: 1px solid var(--line); }
.proof-strip article:last-child { border-right: 0; }
.proof-strip h2,
.capability-list h2,
.control-grid h2,
.policy-copy h2,
.policy-block h2 {
  margin: 28px 0 10px;
  font-family: var(--display);
  font-size: 1.55rem;
  line-height: 1.05;
}
.proof-strip p { margin: 0; font-size: 0.94rem; }

.company-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: end;
  margin: 76px 0;
  padding: 36px;
  color: var(--white);
  background: var(--deep-signal);
}
.company-panel > * { min-width: 0; }
.company-panel h2 {
  margin: 8px 0 0;
  overflow-wrap: anywhere;
  font-family: var(--display);
  font-size: 2.4rem;
}
.company-panel p { margin: 0; overflow-wrap: anywhere; }
.company-panel a { color: var(--white); overflow-wrap: anywhere; }

.reading-column { max-width: 870px; }
.reading-column.narrow { max-width: 780px; margin: 0 auto; padding: clamp(70px, 10vw, 140px) 0; }
.capability-list { border-top: 1px solid var(--line); }
.capability-list article { padding: 32px 0; border-bottom: 1px solid var(--line); }
.capability-list h2 { margin-top: 10px; }
code {
  display: inline-block;
  padding: 5px 8px;
  color: var(--verified-dark);
  background: var(--quiet-mist);
  font: 0.78rem/1.3 var(--utility);
}

.process-line {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-bottom: 90px;
  border-top: 3px solid var(--deep-signal);
}
.process-line div { padding: 24px 22px; border-right: 1px solid var(--line); }
.process-line div:last-child { border-right: 0; }
.process-line span { font: 750 0.75rem/1 var(--utility); text-transform: uppercase; }
.process-line p { margin-bottom: 0; font-size: 0.88rem; }

.policy-copy { max-width: 820px; margin: 0 auto; padding: clamp(65px, 9vw, 120px) 0; }
.policy-copy > h1 { font-size: clamp(3rem, 6vw, 5.8rem); }
.policy-copy h2 { margin-top: 48px; }
.policy-meta,
.policy-note {
  padding: 16px 18px;
  border-left: 4px solid var(--boundary-copper);
  background: rgba(215, 228, 224, 0.65);
  font: 0.8rem/1.55 var(--utility);
}
.policy-block { margin: 40px 0; padding: 26px; border: 1px solid var(--line); background: var(--white); }
.policy-block h2 { margin-top: 0; }

.control-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); }
.control-grid article { min-height: 210px; padding: 28px; background: var(--ledger-paper); }
.control-grid h2 { margin-top: 0; }

.contact-ledger { border-top: 1px solid var(--line); }
.contact-ledger div { display: grid; grid-template-columns: 170px 1fr; gap: 24px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.contact-ledger dt { font: 700 0.72rem/1.5 var(--utility); text-transform: uppercase; }
.contact-ledger dd { margin: 0; }

.site-footer {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  padding: 42px 0 54px;
  border-top: 1px solid var(--line);
  font-size: 0.8rem;
}
.site-footer p { margin: 4px 0; }
.site-footer > div:nth-child(2) { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 18px; }
.footer-note { grid-column: 1 / -1; color: rgba(18, 48, 56, 0.72); }

.status-shell { display: grid; min-height: 100vh; place-items: center; padding: 24px; }
.status-card { width: min(680px, 100%); padding: clamp(34px, 8vw, 72px); border: 1px solid var(--line); background: var(--white); box-shadow: var(--shadow); }
.status-card .brand { margin-bottom: 60px; }
.status-card h1 { font-size: clamp(2.8rem, 7vw, 5.4rem); }
.status-card p { margin-bottom: 30px; font-size: 1.05rem; }

.ad-demo { padding: 56px 0 80px; }
.ad-demo h1 { font: 800 clamp(2.3rem, 5vw, 4.5rem)/1.05 var(--display); letter-spacing: -0.04em; }
.ad-table-scroll { overflow-x: auto; margin: 32px 0; border: 1px solid var(--line); }
.ad-table-scroll:focus-visible, summary:focus-visible { outline: 3px solid var(--boundary-copper); outline-offset: 4px; }
.ad-table { border-collapse: collapse; width: 100%; min-width: 860px; background: var(--white); font-size: 0.86rem; }
.ad-table caption { text-align: left; padding: 16px; background: var(--quiet-mist); font-weight: 700; }
.ad-table th, .ad-table td { text-align: right; padding: 18px 14px; border-bottom: 1px solid var(--line); vertical-align: top; font-variant-numeric: tabular-nums; }
.ad-table th:first-child, .ad-table td:last-child { text-align: left; }
.ad-table td:last-child { min-width: 225px; max-width: 290px; }
.ad-table thead { color: var(--white); background: var(--deep-signal); }
.ad-table tfoot { background: var(--quiet-mist); font-weight: 750; }
.ad-demo summary { cursor: pointer; min-height: 44px; padding: 10px 0; font-weight: 700; }

@media (max-width: 820px) {
  .site-header { align-items: flex-start; padding: 18px 0; }
  nav { max-width: 52%; flex-wrap: wrap; justify-content: flex-end; row-gap: 8px; }
  nav a[aria-current="page"]::after { bottom: -3px; }
  .hero-grid,
  .page-grid { grid-template-columns: 1fr; }
  .boundary-rail { position: relative; top: auto; }
  .proof-strip,
  .process-line { grid-template-columns: 1fr 1fr; }
  .proof-strip article:nth-child(2) { border-right: 0; }
  .company-panel { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .site-header { display: block; }
  nav { max-width: none; justify-content: flex-start; margin-top: 18px; }
  .page-intro { display: block; }
  .page-intro > p:last-child { margin-top: 8px; }
  .hero-copy h1,
  .reading-column > h1 {
    font-size: clamp(2.65rem, 11.8vw, 4.2rem);
    overflow-wrap: anywhere;
  }
  .hero-lede,
  .lede,
  .preview-banner { overflow-wrap: anywhere; }
  .proof-strip,
  .process-line,
  .control-grid,
  .company-panel,
  .site-footer { grid-template-columns: 1fr; }
  .proof-strip article,
  .proof-strip article:nth-child(2),
  .process-line div { border-right: 0; border-bottom: 1px solid var(--line); }
  .contact-ledger div { grid-template-columns: 1fr; gap: 4px; }
  .site-footer a { display: inline-flex; min-height: 44px; align-items: center; }
  .site-footer > div:nth-child(2) { justify-content: flex-start; }
  .footer-note { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}
.demo-controls { display:flex; flex-wrap:wrap; align-items:end; gap:1rem; margin:1.5rem 0; }
.demo-controls label { display:grid; gap:.4rem; }
.demo-controls select { max-width:100%; padding:.7rem; font:inherit; border:1px solid currentColor; background:var(--paper, #eef3f2); color:inherit; }
.demo-controls select:focus-visible, .ad-table input:focus-visible { outline:3px solid #0c6b63; outline-offset:3px; }
.ad-table input[type="checkbox"] { width:1.2rem; height:1.2rem; }