/* Authesta marketing site. One stylesheet, no framework, system fonts (no third-party requests). */

:root {
  --navy: #061a40;
  --navy-2: #0b2554;
  --ink: #1b2940;
  --muted: #55657d;
  --line: #d8e0eb;
  --line-strong: #b9c5d6;
  --wash: #f3f6fa;
  --white: #ffffff;
  --blue: #0a5cff;
  --blue-ink: #0047cc;
  --blue-soft: #e8f0ff;

  --allow: #0b6e45;
  --allow-bg: #e7f5ee;
  --require: #8a4b00;
  --require-bg: #fdf1df;
  --deny: #b42318;
  --deny-bg: #fdecea;

  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI Variable Text', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --mono: ui-monospace, 'SF Mono', SFMono-Regular, 'Cascadia Mono', Menlo, Consolas, 'Liberation Mono', monospace;

  --wrap: 1180px;
  --gutter: 24px;
  --radius: 6px;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

h1,
h2,
h3 {
  color: var(--navy);
  margin: 0 0 0.5em;
  font-weight: 650;
  letter-spacing: -0.022em;
  line-height: 1.12;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.3rem, 4.2vw, 3.3rem);
  letter-spacing: -0.032em;
  line-height: 1.04;
}

h2 {
  font-size: clamp(1.75rem, 3vw, 2.4rem);
}

h3 {
  font-size: 1.2rem;
  letter-spacing: -0.012em;
}

p {
  margin: 0 0 1em;
  max-width: 64ch;
}

a {
  color: var(--blue-ink);
}

code {
  font-family: var(--mono);
  font-size: 0.86em;
  color: var(--navy);
}

:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 2px;
  border-radius: 3px;
}

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  background: var(--navy);
  color: #fff;
  padding: 10px 14px;
  border-radius: var(--radius);
  z-index: 100;
}
.skip-link:focus {
  top: 12px;
}

.muted {
  color: var(--muted);
}
.small {
  font-size: 0.92rem;
}

/* ------------------------------------------------------------------ header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: saturate(180%) blur(8px);
}

.header-row {
  display: flex;
  align-items: center;
  gap: 40px;
  height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  flex-shrink: 0;
}
.brand-mark {
  width: 38px;
  height: 30px;
}
.brand-word {
  width: 132px;
  height: 13px;
}

.primary-nav ul,
.mobile-panel ul,
.footer-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.primary-nav ul {
  display: flex;
  gap: 28px;
}

.primary-nav a {
  color: var(--ink);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
}
.primary-nav a:hover {
  color: var(--navy);
  border-bottom-color: var(--line-strong);
}
.primary-nav a[aria-current='page'] {
  color: var(--navy);
  border-bottom-color: var(--blue);
}

.header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 22px;
}

.link-quiet {
  color: var(--ink);
  font-weight: 500;
  font-size: 15px;
  text-decoration: none;
}
.link-quiet:hover {
  color: var(--blue-ink);
  text-decoration: underline;
}

.mobile-nav {
  display: none;
  margin-left: auto;
}
.mobile-nav summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  color: var(--navy);
}
.mobile-nav summary::-webkit-details-marker {
  display: none;
}
.burger,
.burger::before,
.burger::after {
  display: block;
  width: 16px;
  height: 2px;
  background: var(--navy);
  border-radius: 1px;
}
.burger {
  position: relative;
}
.burger::before,
.burger::after {
  content: '';
  position: absolute;
  left: 0;
}
.burger::before {
  top: -5px;
}
.burger::after {
  top: 5px;
}
.mobile-nav[open] .burger {
  background: transparent;
}
.mobile-nav[open] .burger::before {
  top: 0;
  transform: rotate(45deg);
}
.mobile-nav[open] .burger::after {
  top: 0;
  transform: rotate(-45deg);
}
.mobile-panel {
  position: absolute;
  left: 0;
  right: 0;
  top: 68px;
  background: #fff;
  border-bottom: 1px solid var(--line);
  padding: 8px var(--gutter) 24px;
  box-shadow: 0 12px 24px rgba(6, 26, 64, 0.08);
}
.mobile-panel li a {
  display: block;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  color: var(--navy);
  font-weight: 500;
  text-decoration: none;
}
.mobile-panel li a[aria-current='page'] {
  color: var(--blue-ink);
}
.mobile-actions {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

/* ----------------------------------------------------------------- buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
  white-space: nowrap;
}
.btn-sm {
  min-height: 38px;
  padding: 0 16px;
  font-size: 15px;
}
.btn-primary {
  background: var(--blue);
  color: #fff;
}
.btn-primary:hover {
  background: var(--blue-ink);
}
.btn-secondary {
  background: #fff;
  color: var(--navy);
  border-color: var(--line-strong);
}
.btn-secondary:hover {
  border-color: var(--navy);
}

.text-link {
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}
.text-link:hover {
  color: var(--navy);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 18px;
  margin-top: 30px;
}

/* --------------------------------------------------------- decision labels */

.decision,
.verdict {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1;
  padding: 6px 8px;
  border-radius: 3px;
  border: 1px solid;
  white-space: nowrap;
}
.d-allow {
  color: var(--allow);
  background: var(--allow-bg);
  border-color: rgba(11, 110, 69, 0.28);
}
.d-require {
  color: var(--require);
  background: var(--require-bg);
  border-color: rgba(138, 75, 0, 0.28);
}
.d-deny {
  color: var(--deny);
  background: var(--deny-bg);
  border-color: rgba(180, 35, 24, 0.28);
}
.verdict {
  background: #fff;
  font-size: 11.5px;
  padding: 5px 7px;
}
.v-match {
  color: var(--allow);
  border-color: rgba(11, 110, 69, 0.35);
}
.v-deviation {
  color: var(--deny);
  border-color: rgba(180, 35, 24, 0.35);
}
.v-nv {
  color: var(--muted);
  border-color: var(--line-strong);
}

/* -------------------------------------------------------------------- hero */

.hero {
  padding: 84px 0 92px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #fff 0%, #fff 55%, var(--wash) 100%);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 64px;
  align-items: center;
}
.h1-line {
  display: block;
  text-wrap: balance;
}
.kicker {
  color: var(--blue-ink);
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 18px;
}
.lede {
  font-size: 1.2rem;
  line-height: 1.55;
  color: var(--ink);
  margin-top: 22px;
  max-width: 34em;
}

/* The decision ledger: the one bold element on the homepage. */
.ledger {
  margin: 0;
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  box-shadow: 0 1px 0 rgba(6, 26, 64, 0.04), 0 24px 48px -28px rgba(6, 26, 64, 0.35);
  overflow: hidden;
}
.ledger-head {
  display: flex;
  justify-content: space-between;
  padding: 12px 22px;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  background: var(--wash);
  border-bottom: 1px solid var(--line);
}
.ledger-rows {
  list-style: none;
  margin: 0;
  padding: 0;
}
.ledger-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
}
.ledger-row:last-child {
  border-bottom: 0;
}
.ledger-action {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}
.ledger-action code {
  font-size: 14px;
  font-weight: 600;
  overflow-wrap: anywhere;
}
.ledger-detail {
  font-size: 14px;
  color: var(--muted);
}
.ledger-outcome {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  text-align: right;
}
.ledger-note {
  font-size: 13px;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.ledger figcaption {
  padding: 11px 22px;
  font-size: 13px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: var(--wash);
}

@media (prefers-reduced-motion: no-preference) {
  .ledger-outcome .decision {
    animation: stamp 420ms cubic-bezier(0.2, 0.7, 0.2, 1) both;
  }
  .ledger-outcome .ledger-note {
    animation: fade 400ms ease-out both;
  }
  .ledger-row:nth-child(1) .decision { animation-delay: 350ms; }
  .ledger-row:nth-child(1) .ledger-note { animation-delay: 650ms; }
  .ledger-row:nth-child(2) .decision { animation-delay: 750ms; }
  .ledger-row:nth-child(2) .ledger-note { animation-delay: 1050ms; }
  .ledger-row:nth-child(3) .decision { animation-delay: 1150ms; }
  .ledger-row:nth-child(3) .ledger-note { animation-delay: 1450ms; }
  .ledger-row:nth-child(4) .decision { animation-delay: 1550ms; }
  .ledger-row:nth-child(4) .ledger-note { animation-delay: 1850ms; }
}
@keyframes stamp {
  from {
    opacity: 0;
    transform: scale(1.18);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}
@keyframes fade {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* ---------------------------------------------------------------- sections */

.section {
  padding: 96px 0;
}
.section-tight {
  padding: 72px 0;
}
.section-wash {
  background: var(--wash);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.section-title {
  margin-bottom: 40px;
  max-width: 24ch;
}
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  margin-bottom: 40px;
}
.section-head .section-title {
  margin-bottom: 0;
}

.band {
  padding: 96px 0;
}
.rule-top {
  border-top: 1px solid var(--line);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 72px;
  align-items: center;
}
.split-wide {
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
}

/* Problem: checkpoint diagram */
.checkpoint {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  max-width: 440px;
  margin-left: auto;
  width: 100%;
}
.cp-node {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 16px 20px;
  font-weight: 600;
  color: var(--navy);
  background: #fff;
  text-align: center;
}
.cp-authesta {
  border: 2px solid var(--navy);
  padding: 18px 20px 20px;
}
.cp-name {
  display: block;
  font-size: 18px;
  margin-bottom: 12px;
}
.cp-checks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}
.cp-checks li {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--blue-ink);
  background: var(--blue-soft);
  border-radius: 3px;
  padding: 4px 9px;
}
.cp-arrow {
  height: 34px;
  width: 2px;
  background: var(--line-strong);
  margin: 0 auto;
  position: relative;
}
.cp-arrow::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: -5px;
  border: 6px solid transparent;
  border-top-color: var(--line-strong);
  border-bottom: 0;
}

/* Decision columns */
.decision-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
}
.dcol {
  padding: 30px 32px 6px 0;
  border-top: 4px solid;
  margin-top: -1px;
}
.dcol + .dcol {
  padding-left: 32px;
  border-left: 1px solid var(--line);
}
.dcol-allow {
  border-top-color: var(--allow);
}
.dcol-require {
  border-top-color: #c27a13;
}
.dcol-deny {
  border-top-color: var(--deny);
}
.dcol-text {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--navy);
  line-height: 1.3;
  margin: 18px 0 14px;
}
.dcol-example {
  font-size: 1rem;
}
.dcol-example .muted {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 2px;
}

/* Procurement scale */
.scale {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px 28px 24px;
}
.scale-bands {
  margin-top: 0;
  display: grid;
  grid-template-columns: 2fr 5fr 3fr;
  height: 34px;
  border-radius: 4px;
  overflow: hidden;
}
.sb {
  display: flex;
  align-items: center;
  padding: 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  white-space: nowrap;
  overflow: hidden;
}
.sb-allow {
  background: var(--allow-bg);
  color: var(--allow);
}
.sb-require {
  background: var(--require-bg);
  color: var(--require);
}
.sb-deny {
  background: var(--deny-bg);
  color: var(--deny);
}
.scale-pins {
  position: relative;
  z-index: 1;
  height: 30px;
}
.pin {
  position: absolute;
  bottom: 0;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--navy);
  white-space: nowrap;
  padding-bottom: 10px;
}
.pin::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -34px;
  width: 2px;
  height: 40px;
  margin-left: -1px;
  background: var(--navy);
}
.pin-1 {
  left: 14%;
}
.pin-2 {
  left: 60%;
}
.pin-3 {
  left: 79%;
}
.scale-bands {
  position: relative;
}
.scale-axis {
  position: relative;
  height: 26px;
  border-top: 1px solid var(--line-strong);
  margin-top: 8px;
}
.tick {
  position: absolute;
  top: 6px;
  font-size: 12.5px;
  color: var(--muted);
  transform: translateX(-50%);
  white-space: nowrap;
}
.t0 {
  left: 0;
  transform: none;
}
.t1 {
  left: 20%;
}
.t2 {
  left: 70%;
}
.scale-points {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.pt {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.pt-amount {
  font-family: var(--mono);
  font-weight: 600;
  color: var(--navy);
  font-size: 15px;
}
.scale-prohibited {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px dashed var(--line-strong);
}
.scale-prohibited code {
  font-weight: 600;
}
.scale-prohibited .muted {
  font-size: 14px;
}

/* GitHub action list */
.action-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
}
.action-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--line);
}
.action-list li:last-child {
  border-bottom: 0;
}
.action-list code {
  font-size: 15px;
  font-weight: 600;
}
.action-list .target {
  color: var(--muted);
  font-size: 15px;
}
.action-list .decision {
  margin-left: auto;
}

/* Navy flow band */
.section-navy {
  background: var(--navy);
  color: #d5deeb;
}
.section-navy h2 {
  color: #fff;
}
.flow {
  list-style: none;
  counter-reset: flow;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}
.flow li {
  counter-increment: flow;
  padding: 22px 16px 0 0;
  position: relative;
}
.flow li::before {
  content: counter(flow);
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  color: #8fb2ff;
  margin-bottom: 12px;
}
.flow li::after {
  content: '';
  position: absolute;
  top: -4px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #8fb2ff;
}
.flow li:nth-child(5)::after {
  background: #fff;
  width: 9px;
  height: 9px;
  top: -5px;
}
.flow-step {
  display: block;
  color: #fff;
  font-weight: 650;
  font-size: 17px;
  margin-bottom: 8px;
}
.flow-text {
  display: block;
  font-size: 14.5px;
  line-height: 1.5;
}

/* Verification */
.verdicts {
  margin: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-strong);
}
.verdicts > div {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}
.verdicts dt {
  margin: 0;
}
.verdicts dd {
  margin: 0;
}

/* Deployment options */
.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line-strong);
}
.option {
  padding: 32px 40px 8px 0;
}
.option + .option {
  padding-left: 40px;
  border-left: 1px solid var(--line);
}

/* MCP spec */
.spec {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}
.spec > div {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr);
  gap: 16px;
  padding: 18px 24px;
  border-bottom: 1px solid var(--line);
  align-items: center;
}
.spec > div:last-child {
  border-bottom: 0;
}
.spec dt {
  font-weight: 600;
  color: var(--muted);
  font-size: 15px;
}
.spec dd {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
}
.spec-value {
  font-weight: 650;
  color: var(--navy);
}
.spec-note {
  color: var(--muted);
  font-size: 14.5px;
}
.spec code {
  font-size: 14.5px;
  font-weight: 600;
  overflow-wrap: anywhere;
}
.spec-decisions {
  gap: 8px !important;
}

/* Integrations */
.integrations {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
}
.integrations li {
  padding: 22px 24px 22px 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.integrations li + li {
  padding-left: 24px;
  border-left: 1px solid var(--line);
}
.int-name {
  font-weight: 650;
  font-size: 1.2rem;
  color: var(--navy);
}
.int-note {
  color: var(--muted);
  font-size: 15px;
}

/* Feature grid (security highlights) */
.feature-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  column-gap: 40px;
}
.feature-grid li {
  padding: 18px 0 20px;
  border-top: 1px solid var(--line-strong);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.feature-grid strong {
  color: var(--navy);
  font-weight: 650;
}
.feature-grid span {
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.5;
}

/* Autonomy ratio */
.ratio {
  border-left: 3px solid var(--blue);
  padding: 6px 0 6px 32px;
}
.ratio-name {
  font-weight: 650;
  color: var(--navy);
  font-size: 1.15rem;
  margin-bottom: 18px;
}
.ratio-frac {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-bottom: 18px;
}
.ratio-num,
.ratio-den {
  padding: 8px 4px;
  font-size: 1.05rem;
  color: var(--navy);
}
.ratio-num {
  border-bottom: 2px solid var(--navy);
}

/* Pilot facts */
.pilot-facts {
  margin: 0;
  border-top: 1px solid var(--line-strong);
}
.pilot-facts > div {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 16px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}
.pilot-facts dt {
  color: var(--muted);
  font-weight: 600;
  font-size: 15px;
}
.pilot-facts dd {
  margin: 0;
  color: var(--navy);
  font-weight: 600;
}
.pilot-workflows .muted {
  display: block;
  font-size: 14px;
  font-weight: 600;
}

/* Final CTA */
.final-cta {
  background: var(--navy);
  padding: 104px 0 96px;
  color: #d5deeb;
}
.final-cta h2 {
  color: #fff;
  font-size: clamp(1.9rem, 3.4vw, 2.8rem);
  max-width: 32ch;
}
.btn-on-dark-secondary {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.45);
}
.btn-on-dark-secondary:hover {
  border-color: #fff;
}
.final-tag {
  margin-top: 56px;
  color: #8fb2ff;
  font-weight: 600;
  letter-spacing: 0.01em;
}

/* --------------------------------------------------------- inner pages */

.page-hero {
  padding: 76px 0 64px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #fff 0%, var(--wash) 100%);
}
.page-hero h1 {
  font-size: clamp(2.1rem, 4vw, 3.1rem);
  max-width: 20ch;
}
.page-hero .lede {
  max-width: 40em;
}

.topic {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 64px;
  padding: 56px 0;
  border-bottom: 1px solid var(--line);
}
.topic:last-child {
  border-bottom: 0;
}
.topic h2 {
  font-size: clamp(1.45rem, 2.4vw, 1.85rem);
}
.topic-body > :last-child {
  margin-bottom: 0;
}
.topic ul.plain {
  margin: 0 0 1em;
  padding-left: 1.2em;
}
.topic ul.plain li {
  margin-bottom: 0.4em;
}

.rule-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15.5px;
  margin: 8px 0 0;
}
.rule-table caption {
  text-align: left;
  font-size: 14px;
  color: var(--muted);
  padding-bottom: 10px;
}
.rule-table th,
.rule-table td {
  text-align: left;
  padding: 12px 14px 12px 0;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.rule-table th {
  font-size: 13.5px;
  color: var(--muted);
  font-weight: 600;
  border-bottom-color: var(--line-strong);
}
.rule-table td:last-child,
.rule-table th:last-child {
  padding-right: 0;
}
.table-scroll {
  overflow-x: auto;
}

/* Private Gateway diagram */
.pg-wide {
  padding: 56px 0;
  border-bottom: 1px solid var(--line);
}
.pg-wide h2 {
  font-size: clamp(1.45rem, 2.4vw, 1.85rem);
  margin-bottom: 28px;
}
.pg-fig {
  margin: 0;
}
.pg-diagram {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 56px minmax(0, 1.3fr) 56px minmax(0, 1fr);
  align-items: center;
  margin: 8px 0 0;
}
.pg-env {
  grid-column: 1 / 4;
  grid-row: 1;
}
.pg-box {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 18px;
  background: #fff;
  font-weight: 600;
  color: var(--navy);
  text-align: center;
}
.pg-box small {
  display: block;
  font-weight: 400;
  color: var(--muted);
  font-size: 13.5px;
  margin-top: 4px;
}
.pg-gw {
  border: 2px solid var(--navy);
}
.pg-cloud {
  border-style: dashed;
}
.pg-link {
  height: 2px;
  background: var(--line-strong);
  position: relative;
}
.pg-link::after {
  content: '';
  position: absolute;
  right: -1px;
  top: -5px;
  border: 6px solid transparent;
  border-left-color: var(--line-strong);
  border-right: 0;
}
.pg-link.both::before {
  content: '';
  position: absolute;
  left: -1px;
  top: -5px;
  border: 6px solid transparent;
  border-right-color: var(--line-strong);
  border-left: 0;
}
.pg-frame {
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--wash);
  padding: 34px 20px 20px;
  position: relative;
}
.pg-frame-label {
  position: absolute;
  top: 9px;
  left: 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
}
.pg-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 48px minmax(0, 1.2fr) 48px minmax(0, 1fr);
  align-items: center;
}
.pg-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 72px minmax(0, 240px);
  align-items: center;
}
.pg-caption {
  font-size: 14px;
  color: var(--muted);
  margin-top: 14px;
}

.columns-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 48px;
}
.check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}
.check-list li {
  padding: 14px 0 14px 28px;
  border-bottom: 1px solid var(--line);
  position: relative;
}
.check-list li::before {
  content: '';
  position: absolute;
  left: 2px;
  top: 21px;
  width: 12px;
  height: 7px;
  border-left: 2px solid var(--blue);
  border-bottom: 2px solid var(--blue);
  transform: rotate(-45deg);
}
.check-list li strong {
  color: var(--navy);
}

/* Use cases */
.case {
  padding: 64px 0;
  border-bottom: 1px solid var(--line);
}
.case:last-child {
  border-bottom: 0;
}
.case-head {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 64px;
  margin-bottom: 28px;
}
.case-table td:nth-child(2) {
  white-space: nowrap;
}

/* Security */
.sec-index {
  columns: 2;
  column-gap: 48px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.sec-index a {
  display: block;
  padding: 7px 0;
  text-decoration: none;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  break-inside: avoid;
}
.sec-index a:hover {
  color: var(--blue-ink);
}
.note-box {
  border-left: 3px solid var(--line-strong);
  padding: 4px 0 4px 22px;
  color: var(--ink);
}

/* Forms */
.form-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 72px;
  align-items: start;
}
.pilot-form {
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 36px;
}
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 20px;
}
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.field-full {
  grid-column: 1 / -1;
}
.field label,
.field legend {
  font-weight: 600;
  font-size: 15px;
  color: var(--navy);
  padding: 0;
}
.field .hint {
  font-size: 13.5px;
  color: var(--muted);
  font-weight: 400;
}
.field input[type='text'],
.field input[type='email'],
.field textarea,
.field select {
  font: inherit;
  font-size: 16px;
  color: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 11px 12px;
  background: #fff;
  width: 100%;
}
.field textarea {
  min-height: 96px;
  resize: vertical;
}
.field input:focus,
.field textarea:focus {
  border-color: var(--blue);
  outline: 2px solid var(--blue);
  outline-offset: 0;
}
.field[data-invalid] input,
.field[data-invalid] textarea {
  border-color: var(--deny);
}
.field-error {
  color: var(--deny);
  font-size: 14px;
  font-weight: 600;
}
fieldset.field {
  border: 0;
  margin: 0;
  padding: 0;
}
.choice-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 4px;
}
.field .choice {
  font-weight: 500;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 15px;
  cursor: pointer;
  background: #fff;
}
.choice input {
  accent-color: var(--blue);
  width: 16px;
  height: 16px;
  margin: 0;
}
.choice:has(input:checked) {
  border-color: var(--blue);
  background: var(--blue-soft);
}
.choice:has(input:focus-visible) {
  outline: 3px solid var(--blue);
  outline-offset: 2px;
}
.hp {
  position: absolute !important;
  left: -10000px !important;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.form-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 24px;
  margin-top: 28px;
}
.form-foot p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}
.form-alert {
  border: 1px solid rgba(180, 35, 24, 0.35);
  background: var(--deny-bg);
  color: var(--deny);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 24px;
  font-weight: 600;
  font-size: 15px;
}
.confirm {
  border-left: 3px solid var(--allow);
  padding-left: 22px;
}

/* Prose pages */
.prose {
  max-width: 720px;
  padding: 56px 0 96px;
}
.prose h2 {
  font-size: 1.4rem;
  margin-top: 1.8em;
}
.prose ul {
  padding-left: 1.2em;
}
.prose li {
  margin-bottom: 0.4em;
}

/* ------------------------------------------------------------------ footer */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 56px 0 0;
  background: #fff;
}
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 48px;
}
.footer-tagline {
  margin: 18px 0 6px;
  font-weight: 650;
  color: var(--navy);
}
.footer-note {
  color: var(--muted);
  font-size: 15px;
}
.footer-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}
.footer-nav a {
  display: inline-block;
  padding: 5px 0;
  color: var(--ink);
  text-decoration: none;
  font-size: 15px;
}
.footer-nav a:hover {
  color: var(--blue-ink);
  text-decoration: underline;
}
.footer-base {
  margin-top: 40px;
  padding-top: 20px;
  padding-bottom: 28px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  color: var(--muted);
}
.footer-base p {
  margin: 0;
}

/* ------------------------------------------------------------- responsive */

@media (max-width: 1180px) {
  .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    row-gap: 40px;
  }
}

@media (max-width: 1080px) {
  .primary-nav ul {
    gap: 20px;
  }
  .header-row {
    gap: 28px;
  }
}

@media (max-width: 980px) {
  .primary-nav,
  .header-actions {
    display: none;
  }
  .mobile-nav {
    display: block;
  }
  .hero-grid,
  .split,
  .split-wide,
  .topic,
  .case-head,
  .form-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 44px;
  }
  .checkpoint {
    margin: 0;
  }
  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 720px) {
  :root {
    --gutter: 16px;
  }
  body {
    font-size: 16px;
  }
  .hero {
    padding: 48px 0 56px;
  }
  .lede {
    font-size: 1.08rem;
  }
  .section,
  .band {
    padding: 64px 0;
  }
  .section-title {
    margin-bottom: 28px;
  }
  .section-head {
    flex-direction: column;
    gap: 10px;
    margin-bottom: 28px;
  }
  .decision-cols,
  .two-col,
  .integrations,
  .feature-grid,
  .columns-2 {
    grid-template-columns: minmax(0, 1fr);
  }
  .dcol,
  .dcol + .dcol {
    padding: 24px 0 8px;
    border-left: 0;
  }
  .dcol + .dcol {
    margin-top: 16px;
  }
  .option,
  .option + .option {
    padding: 28px 0 4px;
    border-left: 0;
  }
  .option + .option {
    border-top: 1px solid var(--line);
  }
  .integrations li,
  .integrations li + li {
    padding: 18px 0;
    border-left: 0;
  }
  .integrations li + li {
    border-top: 1px solid var(--line);
  }
  .flow {
    grid-template-columns: minmax(0, 1fr);
    row-gap: 0;
    border-top: 0;
    border-left: 1px solid rgba(255, 255, 255, 0.18);
    margin-left: 4px;
  }
  .flow li {
    padding: 0 0 26px 26px;
  }
  .flow li::before {
    display: inline;
    margin-right: 10px;
  }
  .flow li::after {
    top: 6px;
    left: -4px;
  }
  .flow li:nth-child(5)::after {
    top: 5px;
    left: -5px;
  }
  .flow-step {
    display: inline;
  }
  .flow-text {
    margin-top: 6px;
  }
  .ledger-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
    padding: 16px;
  }
  .ledger-head span:last-child {
    display: none;
  }
  .ledger-head,
  .ledger figcaption {
    padding-left: 16px;
    padding-right: 16px;
  }
  .ledger-outcome {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    text-align: left;
    gap: 8px 10px;
  }
  .verdicts > div,
  .spec > div,
  .pilot-facts > div {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }
  .spec > div {
    padding: 16px 18px;
  }
  .action-list li {
    flex-wrap: wrap;
    padding: 16px 18px;
    gap: 6px 10px;
  }
  .action-list .decision {
    margin-left: 0;
  }
  .action-list li > code {
    flex-basis: 100%;
  }
  .action-list li > code + .target {
    margin-top: -6px;
    flex-basis: 100%;
  }
  .sb span,
  .scale-pins {
    display: none;
  }
  .scale {
    padding: 20px 16px;
  }
  .t1 {
    left: 22%;
  }
  .pt {
    flex-wrap: wrap;
  }
  .ratio {
    padding-left: 20px;
  }
  .pilot-form {
    padding: 22px 16px;
  }
  .form-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .sec-index {
    columns: 1;
  }
  .topic {
    padding: 44px 0;
    gap: 16px;
  }
  .case {
    padding: 48px 0;
  }
  .case-head {
    gap: 8px;
  }
  .page-hero {
    padding: 48px 0 44px;
  }
  .final-cta {
    padding: 72px 0 64px;
  }
  .footer-nav {
    gap: 8px;
  }
  .pg-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }
  .pg-layout {
    grid-template-columns: minmax(0, 1fr);
  }
  .pg-row .pg-link,
  .pg-layout .pg-link {
    width: 2px;
    height: 28px;
    margin: 0 auto;
  }
  .pg-row .pg-link::after,
  .pg-layout .pg-link::after {
    right: auto;
    top: auto;
    left: -5px;
    bottom: -1px;
    border: 6px solid transparent;
    border-top-color: var(--line-strong);
    border-bottom: 0;
  }
  .pg-layout .pg-link.both::before {
    left: -5px;
    top: -1px;
    border: 6px solid transparent;
    border-bottom-color: var(--line-strong);
    border-top: 0;
  }
}

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