:root {
  color-scheme: dark;
  --bg: #07100e;
  --bg-raised: #0d1916;
  --panel: #10211c;
  --panel-soft: #132820;
  --line: #294239;
  --line-strong: #44665a;
  --text: #f4f0e6;
  --muted: #a8b9b1;
  --accent: #f5b942;
  --accent-ink: #211704;
  --mint: #9de2bf;
  --danger: #ff8f70;
  --max: 1180px;
  --radius: 10px;
  --shadow: 0 24px 72px rgba(0, 0, 0, 0.28);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(rgba(157, 226, 191, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(157, 226, 191, 0.035) 1px, transparent 1px),
    var(--bg);
  background-size: 32px 32px;
  color: var(--text);
  line-height: 1.65;
}

a {
  color: inherit;
}

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

code,
pre,
.kicker,
.eyebrow,
.brand,
.pill,
.step-number,
.metric strong,
.docs-nav {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 8px 12px;
  background: var(--accent);
  color: var(--accent-ink);
  transform: translateY(-160%);
}

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

.shell {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(68, 102, 90, 0.6);
  background: rgba(7, 16, 14, 0.9);
  backdrop-filter: blur(14px);
}

.nav {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.brand-mark {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border: 1px solid var(--accent);
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--muted);
  font-size: 0.94rem;
}

.nav-links a {
  text-decoration: none;
}

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

.nav-cta {
  padding: 8px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, 0.9fr);
  gap: 72px;
  align-items: center;
  min-height: 720px;
  padding: 86px 0 96px;
}

.eyebrow,
.kicker {
  margin: 0 0 16px;
  color: var(--mint);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.08;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 760px;
  font-size: clamp(3.4rem, 7vw, 6.8rem);
  font-weight: 780;
}

h2 {
  max-width: 820px;
  font-size: clamp(2.15rem, 4vw, 4rem);
}

h3 {
  font-size: 1.25rem;
  letter-spacing: -0.015em;
}

.lede {
  max-width: 670px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.28rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  background: transparent;
  color: var(--text);
  font-weight: 750;
  text-decoration: none;
}

.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--accent-ink);
}

.button:hover {
  transform: translateY(-1px);
  border-color: var(--mint);
}

.hero-note {
  margin-top: 22px;
  color: var(--muted);
  font-size: 0.88rem;
}

.flow-card {
  position: relative;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(13, 25, 22, 0.94);
  box-shadow: var(--shadow);
}

.flow-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 8px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: uppercase;
}

.pill::before {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--mint);
  content: "";
}

.flow-stack {
  display: grid;
  gap: 9px;
}

.flow-step {
  display: grid;
  grid-template-columns: 34px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--panel);
}

.step-number {
  color: var(--accent);
  font-size: 0.76rem;
}

.flow-step strong,
.flow-step span {
  display: block;
}

.flow-step span {
  color: var(--muted);
  font-size: 0.82rem;
}

.flow-arrow {
  color: var(--line-strong);
}

.human-gate {
  border-color: var(--accent);
  background: #241c0d;
}

.human-gate .flow-arrow,
.human-gate .step-number {
  color: var(--accent);
}

.boundary-label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 14px 2px;
  color: var(--danger);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.72rem;
  text-transform: uppercase;
}

.boundary-label::before,
.boundary-label::after {
  height: 1px;
  flex: 1;
  background: repeating-linear-gradient(90deg, var(--danger) 0 6px, transparent 6px 12px);
  content: "";
}

.section {
  padding: 104px 0;
  border-top: 1px solid var(--line);
}

.section-intro {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 56px;
  margin-bottom: 48px;
}

.section-intro p {
  max-width: 650px;
  margin: 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.card {
  min-height: 220px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-raised);
}

.card-icon {
  display: grid;
  width: 40px;
  height: 40px;
  margin-bottom: 34px;
  place-items: center;
  border: 1px solid var(--line-strong);
  color: var(--accent);
  font-family: "SFMono-Regular", Consolas, monospace;
}

.card p {
  margin: 14px 0 0;
  color: var(--muted);
}

.steps {
  display: grid;
  counter-reset: flow;
  border-top: 1px solid var(--line);
}

.process-step {
  display: grid;
  grid-template-columns: 96px 0.7fr 1.3fr;
  gap: 30px;
  align-items: start;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
  counter-increment: flow;
}

.process-step::before {
  color: var(--accent);
  content: "0" counter(flow);
  font-family: "SFMono-Regular", Consolas, monospace;
}

.process-step p {
  margin: 0;
  color: var(--muted);
}

.code-panel {
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: #050a08;
  box-shadow: var(--shadow);
}

.code-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 11px 15px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.78rem;
}

pre {
  overflow-x: auto;
  margin: 0;
  padding: 22px;
  color: var(--mint);
  font-size: 0.86rem;
  line-height: 1.7;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.metric {
  min-height: 140px;
  padding: 22px;
  background: var(--bg-raised);
}

.metric strong {
  display: block;
  color: var(--accent);
  font-size: 1.7rem;
}

.metric span {
  color: var(--muted);
  font-size: 0.9rem;
}

.callout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  padding: 42px;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  background: #171509;
}

.callout p {
  margin: 18px 0 0;
  color: var(--muted);
}

.site-footer {
  padding: 42px 0 54px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.86rem;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  gap: 24px;
}

/* Documentation pages */
.docs-hero {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--line);
}

.docs-hero h1 {
  max-width: 900px;
  font-size: clamp(2.8rem, 6vw, 5.2rem);
}

.docs-layout {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: 56px;
  align-items: start;
  padding: 56px 0 100px;
}

.docs-nav {
  position: sticky;
  top: 100px;
  display: grid;
  gap: 6px;
  font-size: 0.82rem;
}

.docs-nav a {
  padding: 8px 10px;
  border-left: 2px solid transparent;
  color: var(--muted);
  text-decoration: none;
}

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

.docs-content {
  min-width: 0;
}

.docs-content > section {
  padding: 0 0 58px;
  scroll-margin-top: 96px;
}

.docs-content h2 {
  margin-bottom: 20px;
  font-size: clamp(1.8rem, 3vw, 2.8rem);
}

.docs-content h3 {
  margin: 34px 0 12px;
}

.docs-content p,
.docs-content li {
  color: var(--muted);
}

.docs-content strong {
  color: var(--text);
}

.docs-content table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.docs-content th,
.docs-content td {
  padding: 12px 14px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.docs-content th {
  background: var(--panel);
  color: var(--text);
}

.diagram {
  overflow: auto;
  margin: 26px 0 18px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #07100e;
}

.diagram img {
  display: block;
  width: 1280px;
  max-width: none;
  margin: 0 auto;
}

.diagram.compact img {
  width: 1080px;
}

.diagram.timing img {
  width: 1800px;
  max-width: none;
}

.diagram-link {
  display: inline-block;
  margin: 0 0 10px;
  color: var(--mint);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.78rem;
}

.notice {
  margin: 22px 0;
  padding: 16px 18px;
  border-left: 3px solid var(--accent);
  background: #171509;
  color: var(--muted);
}

.notice strong {
  color: var(--accent);
}

.tool-list {
  display: grid;
  gap: 10px;
  padding: 0;
  list-style: none;
}

.tool-list li {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--bg-raised);
}

@media (max-width: 900px) {
  .hero,
  .section-intro,
  .callout {
    grid-template-columns: 1fr;
  }

  .hero {
    gap: 54px;
    min-height: auto;
  }

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

  .metrics {
    grid-template-columns: repeat(2, 1fr);
  }

  .docs-layout {
    grid-template-columns: 1fr;
  }

  .docs-nav {
    position: static;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .shell {
    width: min(calc(100% - 24px), var(--max));
  }

  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
  }

  .nav-links {
    display: grid;
    width: 100%;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 4px 14px;
    overflow: visible;
    padding-bottom: 2px;
  }

  .nav-links a {
    padding: 4px 0;
  }

  .nav-links .nav-cta {
    display: none;
  }

  .hero {
    padding: 62px 0 72px;
  }

  h1 {
    font-size: clamp(3rem, 15vw, 4.7rem);
  }

  .section {
    padding: 76px 0;
  }

  .process-step {
    grid-template-columns: 50px 1fr;
  }

  .process-step p {
    grid-column: 2;
  }

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

  .callout {
    padding: 26px;
  }

  .footer-row {
    flex-direction: column;
  }

  .docs-nav {
    grid-template-columns: 1fr;
  }

  .diagram {
    margin-inline: -12px;
    border-right: 0;
    border-left: 0;
    border-radius: 0;
  }
}

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

  .button:hover {
    transform: none;
  }
}