:root {
  color-scheme: dark;
  --ground: #080b0e;
  --surface: #0f1419;
  --surface-raised: #141a20;
  --ink: #eef3f6;
  --muted: #a8b3bc;
  --quiet: #75838e;
  --line: #29323a;
  --line-strong: #47545e;
  --signal: #d1a14a;
  --signal-soft: #201a10;
  --verified: #78b89a;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--ground);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    var(--ground);
  background-size: 32px 32px;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration-color: var(--signal);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

a:hover {
  color: #ffffff;
}

a:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 4px;
  border-radius: 2px;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  background: var(--ink);
  color: var(--ground);
  transform: translateY(-160%);
}

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

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(8, 11, 14, 0.94);
}

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

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-decoration: none;
  text-transform: uppercase;
}

.brand-mark {
  display: grid;
  width: 27px;
  height: 27px;
  place-items: center;
  border: 1px solid var(--line-strong);
  color: var(--signal);
  font-size: 13px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
}

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

.shell {
  padding-block: 72px 104px;
}

.eyebrow,
.section-index,
.system-status,
.breadcrumb,
.meta-line,
.stack-list,
.evidence-label {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--signal);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  overflow-wrap: anywhere;
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1 {
  max-width: 920px;
  margin: 0;
  font-size: clamp(2.3rem, 6vw, 5.3rem);
  font-weight: 580;
  letter-spacing: -0.055em;
  line-height: 0.98;
}

.detail h1 {
  max-width: 1000px;
  font-size: clamp(2.15rem, 5.2vw, 4.8rem);
}

.lede {
  max-width: 760px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  line-height: 1.55;
  overflow-wrap: anywhere;
}

.lede strong {
  color: var(--ink);
  font-weight: 600;
}

.system-status {
  display: flex;
  flex-wrap: wrap;
  gap: 9px 18px;
  margin-top: 36px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--quiet);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.system-status strong {
  color: var(--verified);
  font-weight: 600;
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 72px;
  border: 1px solid var(--line);
  background: var(--line);
}

.proof-card {
  position: relative;
  min-height: 410px;
  display: flex;
  flex-direction: column;
  padding: 28px;
  background: var(--surface);
  text-decoration: none;
  transition: background-color 180ms ease;
}

.proof-card:hover {
  background: var(--surface-raised);
}

.proof-card:focus-visible {
  z-index: 2;
}

.card-number {
  color: var(--quiet);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.1em;
}

.proof-card h2 {
  margin: 52px 0 14px;
  font-size: 1.45rem;
  font-weight: 580;
  letter-spacing: -0.025em;
  line-height: 1.18;
}

.proof-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.card-failure {
  margin-top: auto !important;
  padding-top: 28px;
  color: var(--ink) !important;
}

.card-failure span {
  display: block;
  margin-bottom: 7px;
  color: var(--signal);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 32px;
  color: var(--quiet);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.breadcrumb a {
  color: var(--muted);
}

.meta-line {
  margin: 20px 0 0;
  color: var(--quiet);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  overflow-wrap: anywhere;
}

.teardown {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 0 42px;
  max-width: 980px;
  margin-top: 80px;
  border-top: 1px solid var(--line);
}

.teardown-section {
  display: contents;
}

.section-index {
  padding-top: 34px;
  color: var(--quiet);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.section-body {
  min-width: 0;
  padding: 30px 0 38px;
  border-bottom: 1px solid var(--line);
}

.section-body h2 {
  margin: 0 0 18px;
  font-size: clamp(1.35rem, 2.4vw, 1.8rem);
  font-weight: 580;
  letter-spacing: -0.025em;
}

.section-body p {
  max-width: 760px;
  margin: 0 0 16px;
  color: var(--muted);
}

.section-body p:last-child {
  margin-bottom: 0;
}

.architecture {
  overflow-x: auto;
  margin: 0;
  padding: 22px;
  border: 1px solid var(--line);
  background: #090d10;
  color: #cbd4da;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 12px;
  line-height: 1.8;
  white-space: pre;
}

.node-list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
  list-style: none;
}

.node-list li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 16px;
  padding: 15px 18px;
  background: #0a0e12;
  color: var(--muted);
}

.node-list b {
  color: var(--ink);
  font-weight: 580;
}

.node-list span {
  color: var(--signal);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 11px;
}

.failure-box {
  padding: 22px;
  border: 1px solid #59451f;
  border-left: 3px solid var(--signal);
  background: var(--signal-soft);
}

.failure-box p {
  color: var(--ink);
}

.stack-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.stack-list li {
  padding: 6px 9px;
  border: 1px solid var(--line-strong);
  color: var(--muted);
  font-size: 11px;
}

.cta-panel {
  max-width: 980px;
  margin-top: 56px;
  padding: 30px;
  border: 1px solid var(--line-strong);
  background: var(--surface);
}

.cta-panel h2 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 2.3rem);
  font-weight: 580;
  letter-spacing: -0.035em;
  line-height: 1.15;
}

.cta-panel p {
  max-width: 700px;
  margin: 14px 0 24px;
  color: var(--muted);
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 11px 16px;
  border: 1px solid var(--signal);
  background: var(--signal);
  color: #090b0d;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
  transition: background-color 180ms ease, color 180ms ease;
}

.button:hover {
  background: transparent;
  color: var(--ink);
}

.site-footer {
  border-top: 1px solid var(--line);
}

.footer-inner {
  width: min(calc(100% - 40px), var(--max));
  margin-inline: auto;
  padding-block: 28px 40px;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  color: var(--quiet);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

@media (max-width: 860px) {
  .proof-grid {
    grid-template-columns: 1fr;
  }

  .proof-card {
    min-height: 300px;
  }

  .proof-card h2 {
    margin-top: 34px;
  }
}

@media (max-width: 680px) {
  .header-inner,
  .shell,
  .footer-inner {
    width: min(calc(100% - 28px), var(--max));
  }

  .header-inner {
    min-height: 60px;
    gap: 10px;
  }

  .brand {
    gap: 8px;
    font-size: 10px;
    letter-spacing: 0.1em;
  }

  .brand-mark {
    flex: 0 0 auto;
  }

  .site-nav {
    gap: 8px;
    font-size: 9px;
  }

  .site-nav a:not(.nav-cta) {
    display: none;
  }

  .shell {
    padding-block: 48px 76px;
  }

  .teardown {
    display: block;
    margin-top: 56px;
  }

  .teardown-section {
    display: block;
    border-bottom: 1px solid var(--line);
  }

  .section-index {
    padding-top: 28px;
  }

  .section-body {
    padding-top: 8px;
    border: 0;
  }

  .architecture {
    padding: 16px;
    font-size: 10px;
  }

  .node-list li {
    grid-template-columns: 28px 1fr;
    padding-inline: 14px;
  }

  .cta-panel {
    padding: 22px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}