:root {
  --ink: #090d14;
  --panel: #101824;
  --line: #253246;
  --text: #f5f7fa;
  --muted: #9cacbf;
  --cyan: #67e8f9;
  --green: #86efac;
  --paper: #eef2f5;
  --paper-ink: #121923;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    "Segoe UI",
    sans-serif;
  line-height: 1.55;
}
a {
  color: inherit;
}
.wrap {
  width: min(1180px, calc(100% - 40px));
  margin-inline: auto;
}
.skip-link {
  position: fixed;
  left: 1rem;
  top: -5rem;
  background: var(--cyan);
  color: var(--ink);
  padding: 0.7rem 1rem;
  z-index: 20;
  font-weight: 700;
}
.skip-link:focus {
  top: 1rem;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 80%, transparent);
  background: color-mix(in srgb, var(--ink) 88%, transparent);
  backdrop-filter: blur(14px);
}
.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border: 1px solid var(--cyan);
  border-radius: 8px;
  color: var(--cyan);
  font-weight: 800;
}
.brand b {
  color: var(--cyan);
}
nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.87rem;
}
nav a:hover,
nav a:focus-visible {
  color: white;
}
.nav-cta {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.55rem 0.85rem;
  color: white !important;
}
.hero {
  min-height: 690px;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: clamp(3rem, 8vw, 7rem);
  padding-block: 7rem;
}
.hero-copy {
  max-width: 660px;
}
.eyebrow {
  margin: 0 0 1rem;
  color: var(--cyan);
  font-family: ui-monospace, "Cascadia Code", monospace;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.hero h1,
.section h2 {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 500;
  letter-spacing: -0.045em;
}
.hero h1 {
  font-size: clamp(3.2rem, 7vw, 6.6rem);
  line-height: 0.92;
  margin: 0;
}
.lede {
  max-width: 650px;
  margin: 2rem 0 0;
  color: #c6d1dd;
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  line-height: 1.7;
}
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2.2rem;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  min-height: 46px;
  padding: 0.7rem 1rem;
  border: 1px solid transparent;
  border-radius: 8px;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 700;
}
.button:focus-visible,
select:focus-visible,
button:focus-visible,
a:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 3px;
}
.primary {
  background: var(--cyan);
  color: var(--ink);
}
.secondary {
  border-color: var(--line);
  background: var(--panel);
  color: var(--text);
}
.trust-note {
  margin: 1.25rem 0 0;
  color: var(--muted);
  font-size: 0.8rem;
}
.decision-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(155deg, #111b29, #0c111a);
  padding: 1.25rem;
  box-shadow: 0 30px 80px #0008;
}
.decision-head,
.decision-foot {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-family: ui-monospace, monospace;
  font-size: 0.7rem;
  color: var(--muted);
}
.decision-head strong {
  color: var(--green);
  letter-spacing: 0.12em;
}
.decision-card ol {
  list-style: none;
  padding: 1rem 0;
  margin: 1rem 0;
  border-block: 1px solid var(--line);
}
.decision-card li {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 0.8rem;
  align-items: center;
  padding: 0.72rem;
}
.decision-card li + li {
  border-top: 1px solid #1a2636;
}
.decision-card li > span {
  color: var(--cyan);
  font-family: ui-monospace, monospace;
  font-size: 0.68rem;
}
.decision-card b,
.decision-card small {
  display: block;
}
.decision-card b {
  font-size: 0.85rem;
}
.decision-card small {
  margin-top: 0.15rem;
  color: var(--muted);
}
.principles {
  background: var(--paper);
  color: var(--paper-ink);
  padding: 4rem 0;
}
.principle-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.principle-grid article {
  padding: 1rem 2rem;
  border-left: 1px solid #cbd4dd;
}
.principle-grid article:first-child {
  border-left: 0;
  padding-left: 0;
}
.principle-grid span {
  font-family: ui-monospace, monospace;
  font-size: 0.7rem;
  color: #557086;
}
.principle-grid h2 {
  margin: 0.6rem 0;
  font-family: Georgia, serif;
  font-size: 1.7rem;
  font-weight: 500;
}
.principle-grid p {
  margin: 0;
  color: #4d5b68;
  font-size: 0.9rem;
}
.section {
  padding-block: 7rem;
}
.section-intro {
  max-width: 720px;
}
.section-intro h2 {
  font-size: clamp(2.5rem, 5vw, 4.7rem);
  line-height: 1;
  margin: 0.3rem 0 1.25rem;
}
.section-intro > p:not(.eyebrow) {
  color: var(--muted);
  font-size: 1.05rem;
}
.architecture {
  display: grid;
  grid-template-columns: 1fr auto 1.6fr auto 1fr;
  align-items: stretch;
  gap: 1rem;
  margin-top: 4rem;
}
.arch-group,
.arch-core {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.4rem;
}
.arch-group {
  display: grid;
  gap: 0.65rem;
  background: var(--panel);
}
.arch-group small,
.arch-core small {
  color: var(--muted);
  font-family: ui-monospace, monospace;
  font-size: 0.65rem;
  letter-spacing: 0.12em;
}
.arch-group span {
  padding: 0.55rem 0.7rem;
  border: 1px solid #2b3a50;
  border-radius: 6px;
  font-size: 0.82rem;
}
.arrow {
  display: grid;
  place-items: center;
  color: var(--cyan);
}
.arch-core {
  background: linear-gradient(145deg, #14303a, #101926);
}
.core-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  margin: 1.2rem 0;
}
.core-row span {
  padding: 0.8rem 0.35rem;
  text-align: center;
  border-radius: 6px;
  background: #0b121c;
  font-size: 0.75rem;
}
.core-evidence {
  border-top: 1px solid #31505b;
  padding-top: 1rem;
  color: var(--cyan);
  font-family: ui-monospace, monospace;
  font-size: 0.74rem;
}
.quickstart {
  background: #0d131c;
}
.quick-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  align-items: center;
}
.section-intro a {
  display: inline-block;
  margin-top: 1rem;
  color: var(--cyan);
}
.terminal {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #070a0f;
  box-shadow: 0 24px 60px #0007;
}
.terminal-bar {
  display: flex;
  gap: 0.4rem;
  align-items: center;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--line);
  background: #111722;
}
.terminal-bar span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #415067;
}
.terminal-bar b {
  margin-left: auto;
  color: var(--muted);
  font:
    500 0.65rem ui-monospace,
    monospace;
}
.terminal pre {
  overflow: auto;
  margin: 0;
  padding: 1.5rem;
  color: #e2e8f0;
  font:
    400 0.85rem/1.8 ui-monospace,
    "Cascadia Code",
    monospace;
}
.terminal i {
  color: #64748b;
  font-style: normal;
}
.status-section {
  padding-block: 5rem;
}
.status {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.5rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 2rem;
  background: var(--panel);
}
.status-light {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 6px #86efac18;
}
.status .eyebrow {
  margin: 0;
}
.status h2 {
  font-size: 1.35rem;
  margin: 0.25rem 0;
}
.status p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}
footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0;
  color: var(--muted);
  font-size: 0.8rem;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}
.footer-inner div {
  display: flex;
  gap: 1.25rem;
}
.footer-inner a:hover {
  color: white;
}
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    padding-block: 5rem;
  }
  .decision-card {
    max-width: 620px;
  }
  .principle-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
  .principle-grid article:nth-child(3) {
    border-left: 0;
    padding-left: 0;
  }
  .architecture {
    grid-template-columns: 1fr;
  }
  .arrow {
    transform: rotate(90deg);
  }
  .quick-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}
@media (max-width: 640px) {
  .wrap {
    width: min(100% - 28px, 1180px);
  }
  .header-inner {
    align-items: flex-start;
    padding-block: 1rem;
  }
  .site-header nav a:not(.nav-cta) {
    display: none;
  }
  .hero {
    min-height: auto;
  }
  .principle-grid {
    grid-template-columns: 1fr;
  }
  .principle-grid article {
    border-left: 0;
    border-top: 1px solid #cbd4dd;
    padding: 1.3rem 0;
  }
  .principle-grid article:first-child {
    border-top: 0;
  }
  .core-row {
    grid-template-columns: 1fr 1fr;
  }
  .status {
    grid-template-columns: auto 1fr;
  }
  .status .button {
    grid-column: 1/-1;
  }
  .footer-inner,
  .footer-inner div {
    flex-direction: column;
  }
  .section {
    padding-block: 5rem;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}