:root {
  --bg: #f6f5ef;
  --ink: #18211f;
  --muted: #5f6865;
  --panel: #ffffff;
  --panel-soft: #edf2ee;
  --line: #d7ddd8;
  --brand: #146b58;
  --brand-dark: #0e4f41;
  --amber: #e7a92f;
  --blue: #315f9f;
  --rose: #b84d62;
  --code-bg: #101716;
  --code-text: #dff8ec;
  --shadow: 0 24px 60px rgba(20, 33, 28, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
}

a {
  color: inherit;
}

.container {
  width: min(1160px, 92vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(246, 245, 239, 0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0.9rem 0;
}

.brand,
.nav-links {
  display: flex;
  align-items: center;
}

.brand {
  gap: 0.65rem;
  font-weight: 800;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  font-size: 0.78rem;
}

.nav-links {
  gap: 1.25rem;
  color: var(--muted);
  font-size: 0.94rem;
}

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

.nav-cta {
  padding: 0.48rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: #fff;
}

.hero {
  padding: 5.4rem 0 4.6rem;
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
  gap: 3rem;
  align-items: center;
}

.hero-copy {
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--brand);
  font-size: 0.77rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 13ch;
  margin: 0;
  font-size: 5.05rem;
  line-height: 1;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: 2.8rem;
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  margin: 0 0 0.55rem;
  font-size: 1.03rem;
  line-height: 1.25;
}

.lead {
  max-width: 64ch;
  margin: 1.35rem 0 0;
  color: var(--muted);
  font-size: 1.22rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.7rem;
}

.btn {
  display: inline-flex;
  min-height: 2.8rem;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-weight: 800;
  text-decoration: none;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
}

.btn-secondary {
  background: #fff;
  border: 1px solid var(--line);
  color: var(--ink);
}

.terminal-visual,
.code-card,
.signal-panel pre {
  border: 1px solid #22332d;
  border-radius: 8px;
  background: var(--code-bg);
  color: var(--code-text);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.terminal-toolbar {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background: #0c1211;
}

.terminal-toolbar span {
  width: 0.68rem;
  height: 0.68rem;
  border-radius: 50%;
  background: var(--rose);
}

.terminal-toolbar span:nth-child(2) {
  background: var(--amber);
}

.terminal-toolbar span:nth-child(3) {
  background: #5ec08d;
}

.terminal-toolbar strong {
  margin-left: 0.55rem;
  color: #bdd6cb;
  font-size: 0.82rem;
}

.terminal-body {
  display: grid;
  gap: 1rem;
  padding: 1.1rem;
}

.terminal-title {
  margin: 0;
  color: #fff;
  font-weight: 800;
}

.diff-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.6rem;
}

.diff-summary span,
.diff-entry {
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.diff-summary span {
  padding: 0.65rem;
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
}

.diff-entry {
  padding: 0.9rem;
}

.diff-entry strong {
  display: block;
  color: #fff;
}

.diff-entry p,
.diff-entry small {
  margin: 0.25rem 0 0;
  color: #a9c2b7;
}

.muted-entry {
  border-left: 4px solid var(--amber);
}

pre {
  margin: 0;
  padding: 1rem;
  overflow-x: auto;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88rem;
  line-height: 1.55;
}

.intro-band {
  padding: 3.5rem 0;
  background: var(--ink);
  color: #fff;
}

.intro-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 2.5rem;
  align-items: start;
}

.intro-grid h2 {
  font-size: 2.35rem;
}

.intro-grid p {
  margin: 0;
  color: #c7d3cd;
  font-size: 1.08rem;
}

.section {
  padding: 5rem 0;
}

.section-alt {
  background: #fff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-heading {
  max-width: 800px;
  margin-bottom: 2rem;
}

.section-heading p,
.section p {
  color: var(--muted);
}

.steps,
.three-panel,
.capability-structure-grid,
.graph-grid,
.example-grid,
.split {
  display: grid;
  gap: 1rem;
}

.steps {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.steps article,
.signal-panel,
.risk-list {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 1.15rem;
}

.steps span {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  margin-bottom: 1.2rem;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  font-weight: 800;
}

.steps p,
.signal-panel p {
  margin: 0;
}

.split,
.capability-structure-grid,
.graph-grid,
.example-grid {
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  align-items: start;
}

.risk-list {
  border-left: 4px solid var(--amber);
}

ul {
  margin: 0;
  padding-left: 1.2rem;
}

li {
  margin: 0.45rem 0;
}

.three-panel {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.signal-panel {
  display: grid;
  gap: 1rem;
  border-top: 4px solid var(--brand);
}

.signal-panel:nth-child(2) {
  border-top-color: var(--amber);
}

.signal-panel:nth-child(3) {
  border-top-color: var(--blue);
}

.signal-panel h2 {
  font-size: 2rem;
}

.signal-panel pre {
  box-shadow: none;
}

.graph-section {
  background: var(--panel-soft);
}

.graph-visual {
  --graph-node-width: 10.8rem;
  position: relative;
  min-height: 430px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  overflow: hidden;
}

.node {
  position: absolute;
  z-index: 2;
  display: grid;
  place-items: center;
  width: var(--graph-node-width);
  min-height: 4.2rem;
  padding: 0.8rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font-weight: 800;
  text-align: center;
  box-shadow: 0 14px 34px rgba(20, 33, 28, 0.09);
}

.foundation {
  left: 5%;
  top: 10.7rem;
  border-top: 4px solid var(--brand);
}

.center {
  left: 50%;
  top: 10.7rem;
  transform: translateX(-50%);
  border-top: 4px solid var(--amber);
}

.upper {
  right: 5%;
  top: 3.5rem;
  border-top: 4px solid var(--rose);
}

.middle {
  right: 5%;
  top: 10.7rem;
  border-top: 4px solid var(--blue);
}

.lower {
  right: 5%;
  top: 17.9rem;
  border-top: 4px solid var(--brand);
}

.edge {
  position: absolute;
  z-index: 1;
  height: 2px;
  background: var(--line);
}

.edge-one {
  left: calc(5% + var(--graph-node-width));
  right: calc(50% + (var(--graph-node-width) / 2));
  top: 12.8rem;
}

.edge-two {
  left: calc(50% + (var(--graph-node-width) / 2));
  right: calc(5% + var(--graph-node-width));
  top: 12.8rem;
}

.edge-two::before,
.edge-two::after {
  content: "";
  position: absolute;
  right: 0;
  width: 2px;
  height: 7.2rem;
  background: var(--line);
}

.edge-two::before {
  bottom: 0;
}

.edge-two::after {
  top: 0;
}

.code-card {
  box-shadow: none;
}

.tree-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  box-shadow: 0 14px 34px rgba(20, 33, 28, 0.06);
}

.tree-card code {
  color: var(--brand-dark);
  font-weight: 700;
}

.final-cta {
  padding-bottom: 5.5rem;
}

.cta-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.7fr);
  gap: 1.5rem 2rem;
  align-items: center;
  padding: 2rem;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
}

.cta-panel h2 {
  color: #fff;
}

.cta-panel p {
  color: #c7d3cd;
}

.cta-panel .cta-row {
  grid-column: 1 / -1;
  margin-top: 0;
}

.install-box {
  display: grid;
  gap: 0.65rem;
}

.install-box code {
  display: block;
  padding: 0.8rem;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--code-text);
}

@media (max-width: 980px) {
  .hero-grid,
  .intro-grid,
  .split,
  .capability-structure-grid,
  .graph-grid,
  .example-grid,
  .cta-panel {
    grid-template-columns: 1fr;
  }

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

  h1 {
    max-width: 14ch;
    font-size: 4rem;
  }

  h2 {
    font-size: 2.35rem;
  }

  .intro-grid h2 {
    font-size: 2.1rem;
  }
}

@media (max-width: 720px) {
  .nav-wrap {
    align-items: flex-start;
  }

  .nav-links {
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 0.65rem 0.9rem;
  }

  .hero {
    padding-top: 4rem;
  }

  .steps,
  .three-panel {
    grid-template-columns: 1fr;
  }

  .diff-summary {
    grid-template-columns: 1fr;
  }

  .graph-visual {
    min-height: 620px;
  }

  .node {
    left: 50%;
    right: auto;
    width: min(16rem, calc(100% - 2rem));
    transform: translateX(-50%);
  }

  .foundation {
    top: 2rem;
  }

  .center {
    top: 10rem;
  }

  .upper {
    top: 18rem;
  }

  .middle {
    top: 26rem;
  }

  .lower {
    top: 34rem;
    bottom: auto;
  }

  .edge-one,
  .edge-two,
  .edge-two::before,
  .edge-two::after {
    display: none;
  }
}

@media (max-width: 520px) {
  .container {
    width: min(100% - 1.5rem, 1160px);
  }

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

  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2rem;
  }

  .lead {
    font-size: 1.08rem;
  }

  .section {
    padding: 3.7rem 0;
  }

  .terminal-visual,
  .cta-panel {
    border-radius: 8px;
  }

  .cta-panel {
    padding: 1.25rem;
  }
}