:root {
  color-scheme: dark;
  --ink: #071013;
  --panel: #0d171b;
  --panel-2: #111f24;
  --line: #24424a;
  --line-strong: #6f8588;
  --text: #f8fbf8;
  --muted: #b9c8ca;
  --soft: #7c9093;
  --cyan: #20d6d1;
  --cyan-soft: #7df8ee;
  --amber: #f2b95d;
  --max: 1160px;
  --radius: 8px;
  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(90deg, rgba(36, 66, 74, 0.24) 1px, transparent 1px),
    linear-gradient(0deg, rgba(36, 66, 74, 0.2) 1px, transparent 1px),
    radial-gradient(circle at 78% 14%, rgba(32, 214, 209, 0.1), transparent 32rem),
    var(--ink);
  background-size:
    84px 84px,
    84px 84px,
    auto,
    auto;
  color: var(--text);
  letter-spacing: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 20;
  transform: translateY(-140%);
  border: 1px solid var(--cyan);
  background: var(--panel);
  color: var(--text);
  padding: 0.7rem 0.9rem;
  border-radius: var(--radius);
}

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
  padding: 1rem 0;
  backdrop-filter: blur(18px);
}

.topbar::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
}

.brand {
  display: inline-flex;
  align-items: center;
  width: clamp(168px, 25vw, 250px);
}

.brand img {
  width: 100%;
  height: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  border: 1px solid rgba(111, 133, 136, 0.32);
  border-radius: 999px;
  background: rgba(7, 16, 19, 0.72);
  padding: 0.35rem;
}

.nav a {
  min-height: 2.35rem;
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0 0.8rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.nav a:hover,
.nav a:focus-visible,
.nav a.active {
  color: var(--ink);
  background: var(--cyan-soft);
  outline: none;
}

.section {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(4rem, 8vw, 7.5rem) 0;
}

.hero {
  min-height: calc(100svh - 5.5rem);
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(340px, 0.78fr);
  align-items: center;
  gap: clamp(2rem, 6vw, 5rem);
  padding-top: clamp(2rem, 5vw, 4.5rem);
}

.eyebrow,
.section-kicker {
  margin: 0 0 1rem;
  color: var(--cyan-soft);
  font-size: 0.78rem;
  font-weight: 750;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 8.5ch;
  margin-bottom: 1.3rem;
  font-size: clamp(4.2rem, 11vw, 9.5rem);
  line-height: 0.86;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(2rem, 5vw, 4.2rem);
  line-height: 0.98;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 0.8rem;
  font-size: 1.28rem;
}

.hero-dek {
  max-width: 66ch;
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.35rem);
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin: 2rem 0;
}

.button {
  min-height: 3rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 0 1.1rem;
  font-weight: 780;
}

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

.button-secondary {
  background: rgba(13, 23, 27, 0.68);
  color: var(--text);
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
  outline: 2px solid rgba(125, 248, 238, 0.42);
  outline-offset: 3px;
}

.signal-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 2.4rem 0 0;
}

.signal-strip div,
.component-card,
.reference-panel,
.faq-list details {
  border: 1px solid rgba(111, 133, 136, 0.3);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(17, 31, 36, 0.92), rgba(9, 19, 22, 0.92));
}

.signal-strip div {
  min-height: 6.5rem;
  padding: 1rem;
}

.signal-strip dt {
  color: var(--cyan-soft);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.signal-strip dd {
  margin: 0.55rem 0 0;
  color: var(--muted);
  line-height: 1.35;
}

.hero-visual {
  display: grid;
  place-items: center;
}

.instrument {
  position: relative;
  width: min(100%, 520px);
  aspect-ratio: 1;
  border: 1px solid rgba(125, 248, 238, 0.24);
  border-radius: 50%;
  background:
    linear-gradient(90deg, transparent 49.5%, rgba(125, 248, 238, 0.18) 50%, transparent 50.5%),
    linear-gradient(0deg, transparent 49.5%, rgba(125, 248, 238, 0.18) 50%, transparent 50.5%),
    radial-gradient(circle, rgba(32, 214, 209, 0.14), transparent 42%);
}

.orbit {
  position: absolute;
  inset: 11%;
  border: 2px solid rgba(185, 200, 202, 0.48);
  border-radius: 50%;
}

.orbit-one {
  border-top-color: var(--cyan);
  transform: rotate(-18deg);
}

.orbit-two {
  inset: 22%;
  border-right-color: var(--amber);
  transform: rotate(38deg);
}

.core-cube {
  position: absolute;
  inset: 31%;
  display: grid;
  place-items: center;
  clip-path: polygon(50% 0, 88% 22%, 88% 78%, 50% 100%, 12% 78%, 12% 22%);
  background: var(--text);
}

.core-cube span {
  width: 45%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--ink);
  box-shadow: 0 0 0 20px var(--cyan);
}

.node {
  position: absolute;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 5.2rem;
  min-height: 2.3rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(7, 16, 19, 0.86);
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 760;
}

.node-tools {
  left: 50%;
  top: 2%;
  transform: translateX(-50%);
}

.node-memory {
  right: -2%;
  top: 48%;
}

.node-policy {
  left: 50%;
  bottom: 2%;
  transform: translateX(-50%);
}

.node-loop {
  left: -2%;
  top: 48%;
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(220px, 0.75fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.prose {
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.72;
}

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

.section-heading {
  max-width: 780px;
  margin-bottom: 2rem;
}

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

.component-card {
  min-height: 17rem;
  padding: 1.2rem;
}

.card-index {
  display: inline-flex;
  margin-bottom: 2.2rem;
  color: var(--cyan-soft);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.82rem;
}

.component-card p,
.reference-panel p,
.faq-list p,
.footer p {
  color: var(--muted);
  line-height: 1.62;
}

.flow {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid rgba(111, 133, 136, 0.35);
  border-radius: var(--radius);
  overflow: hidden;
}

.flow li {
  position: relative;
  min-height: 12rem;
  padding: 1.1rem;
  background: rgba(13, 23, 27, 0.78);
  border-right: 1px solid rgba(111, 133, 136, 0.28);
}

.flow li:last-child {
  border-right: 0;
}

.flow li::after {
  content: "";
  position: absolute;
  right: -0.55rem;
  top: 50%;
  z-index: 1;
  width: 1rem;
  aspect-ratio: 1;
  border-top: 1px solid var(--cyan);
  border-right: 1px solid var(--cyan);
  background: var(--panel);
  transform: translateY(-50%) rotate(45deg);
}

.flow li:last-child::after {
  display: none;
}

.flow span {
  display: block;
  color: var(--cyan-soft);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.flow strong {
  display: block;
  margin-top: 3rem;
  line-height: 1.35;
}

.reference-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2rem;
  align-items: center;
  padding: clamp(1.2rem, 4vw, 2rem);
}

.reference-panel h2 {
  max-width: 12ch;
}

.faq-list {
  display: grid;
  gap: 0.8rem;
}

.faq-list details {
  padding: 1rem 1.1rem;
}

.faq-list summary {
  cursor: pointer;
  color: var(--text);
  font-weight: 780;
}

.faq-list p {
  margin: 0.85rem 0 0;
}

.footer {
  width: min(var(--max), calc(100% - 2rem));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin: 0 auto;
  padding: 2rem 0 3rem;
  border-top: 1px solid rgba(111, 133, 136, 0.35);
}

.footer div {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 780;
}

.footer img {
  width: 2.2rem;
  height: 2.2rem;
}

.footer p {
  max-width: 58ch;
  margin: 0;
  text-align: right;
}

.footer a {
  color: var(--cyan-soft);
}

@media (max-width: 920px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    width: 100%;
    justify-content: space-between;
    overflow-x: auto;
  }

  .hero,
  .section-grid,
  .reference-panel {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-visual {
    order: -1;
  }

  .instrument {
    width: min(82vw, 430px);
  }

  .component-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .flow li {
    border-right: 1px solid rgba(111, 133, 136, 0.28);
    border-bottom: 1px solid rgba(111, 133, 136, 0.28);
  }

  .flow li::after {
    display: none;
  }

  .footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer p {
    text-align: left;
  }
}

@media (max-width: 620px) {
  .section {
    width: min(100% - 1rem, var(--max));
    padding: 3.5rem 0;
  }

  .topbar {
    width: min(100% - 1rem, var(--max));
  }

  .brand {
    width: 196px;
  }

  .nav a {
    padding: 0 0.72rem;
    font-size: 0.84rem;
  }

  h1 {
    font-size: clamp(3.5rem, 18vw, 5.7rem);
  }

  .hero-dek {
    font-size: 1rem;
  }

  .button {
    width: 100%;
  }

  .signal-strip,
  .component-grid,
  .flow {
    grid-template-columns: 1fr;
  }

  .signal-strip div,
  .component-card,
  .flow li {
    min-height: auto;
  }

  .node {
    min-width: 4.6rem;
    min-height: 2rem;
    font-size: 0.74rem;
  }
}