:root {
  color-scheme: light;
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-serif: Georgia, "Times New Roman", ui-serif, serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --ink: #171614;
  --muted: #5a5750;
  --paper: #fbfaf6;
  --line: #d9d4c8;
  --green: #267a4d;
  --cyan: #23707a;
  --amber: #9b681c;
  --red: #a34035;
  --violet: #6c5a9d;
  --charcoal: #201f1b;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-serif);
  line-height: 1.5;
}

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

code {
  font-family: var(--font-mono);
}

.hero {
  position: relative;
  min-height: 92vh;
  overflow: hidden;
  color: #fffaf0;
  background: var(--charcoal);
}

.hero::after {
  position: absolute;
  inset: 0;
  content: "";
  background:
    linear-gradient(90deg, rgba(20, 18, 15, 0.92) 0%, rgba(20, 18, 15, 0.78) 42%, rgba(20, 18, 15, 0.28) 100%),
    linear-gradient(180deg, rgba(20, 18, 15, 0.05) 0%, rgba(20, 18, 15, 0.72) 100%);
  z-index: 1;
}

.hero-media {
  position: absolute;
  inset: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: saturate(0.86) contrast(1.04);
}

.nav {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 22px 0;
}

.brand {
  font-weight: 900;
  letter-spacing: 0;
}

.nav-links {
  display: flex;
  gap: 22px;
  font-size: 0.95rem;
  color: rgba(255, 250, 240, 0.78);
}

.nav-action,
.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-weight: 800;
}

.nav-action {
  border: 1px solid rgba(255, 250, 240, 0.36);
  padding: 0 16px;
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(820px, calc(100% - 40px));
  margin: 0 auto;
  padding: 14vh 0 18vh;
}

.eyebrow,
.section-label {
  margin: 0 0 14px;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  font-family: var(--font-sans);
  font-size: 5.6rem;
  line-height: 0.95;
  letter-spacing: 0;
}

.lead {
  max-width: 680px;
  margin: 26px 0 0;
  color: rgba(255, 250, 240, 0.84);
  font-size: 1.22rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  padding: 0 20px;
}

.button.primary {
  background: #f3b23e;
  color: #1b1710;
}

.button.secondary {
  border: 1px solid rgba(255, 250, 240, 0.42);
  color: #fffaf0;
}

.section,
.band {
  padding: 86px 0;
}

.band {
  background: #efebe1;
}

.section-inner {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.intro-grid,
.install-grid,
.safety-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 56px;
  align-items: start;
}

h2 {
  max-width: 780px;
  margin: 0;
  font-size: 3.8rem;
  line-height: 1;
  letter-spacing: 0;
}

.intro p:last-child,
.install p,
.boundary-list p {
  margin: 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.section-note {
  max-width: 760px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.architecture-figure {
  margin: 36px 0 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  padding: 18px;
  box-shadow: 0 14px 36px rgba(23, 22, 20, 0.06);
}

.architecture-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.text-link-row {
  margin: 22px 0 0;
}

.text-link-row a {
  color: var(--charcoal);
  font-weight: 900;
}

.boundary-list {
  display: grid;
  gap: 18px;
}

.feature-grid,
.prompt-grid,
.confidence-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 36px;
}

.feature-card,
.prompt-grid figure,
.confidence-grid article,
.terminal {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fffdf8;
}

.feature-card {
  min-height: 220px;
  padding: 22px;
  border-top-width: 6px;
}

.feature-card h3,
.steps h3 {
  margin: 0;
  font-size: 1.2rem;
}

.feature-card p,
.steps p,
.prompt-grid pre {
  margin: 12px 0 0;
  color: var(--muted);
}

.accent-green { border-top-color: var(--green); }
.accent-cyan { border-top-color: var(--cyan); }
.accent-amber { border-top-color: var(--amber); }
.accent-red { border-top-color: var(--red); }
.accent-violet { border-top-color: var(--violet); }
.accent-gray { border-top-color: #615e56; }

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin: 36px 0 0;
  padding: 0;
  list-style: none;
}

.steps li {
  border-top: 3px solid var(--charcoal);
  padding-top: 16px;
}

.steps span {
  display: block;
  margin-bottom: 18px;
  color: var(--amber);
  font-weight: 900;
}

.topology-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 34px;
  align-items: stretch;
  margin-top: 36px;
}

.topology-diagram {
  position: relative;
  display: grid;
  min-height: 520px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-template-rows: repeat(3, minmax(120px, 1fr));
  gap: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fffdf8;
  padding: 18px;
}

.node,
.transport-line {
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-radius: 8px;
  padding: 18px;
}

.node {
  border: 1px solid var(--line);
  background: #fbfaf6;
}

.node strong {
  font-size: 1.12rem;
}

.node span,
.transport-line span {
  margin-top: 8px;
  color: var(--muted);
}

.main-node {
  border-top: 6px solid var(--green);
}

.worker-node {
  border-top: 6px solid var(--cyan);
}

.artifact-node {
  grid-column: 1 / 2;
  border-top: 6px solid var(--amber);
}

.monitor-node {
  grid-column: 2 / 3;
  border-top: 6px solid var(--violet);
}

.transport-line {
  grid-column: 1 / 3;
  align-items: center;
  border: 2px dashed #9b681c;
  color: var(--amber);
  font-weight: 900;
  text-align: center;
}

.tutorial-list {
  display: grid;
  gap: 14px;
}

.tutorial-list article {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fffdf8;
  padding: 18px;
}

.tutorial-list span {
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--charcoal);
  color: #fffaf0;
  font-weight: 900;
}

.tutorial-list h3 {
  margin: 0;
}

.tutorial-list p {
  margin: 8px 0 0;
  color: var(--muted);
}

.prompt-grid figure {
  margin: 0;
  padding: 18px;
}

.confidence-grid article {
  min-height: 190px;
  padding: 22px;
}

.confidence-grid h3 {
  margin: 0;
  font-size: 1.2rem;
}

.confidence-grid p {
  margin: 12px 0 0;
  color: var(--muted);
}

.prompt-grid figcaption {
  font-weight: 900;
}

.prompt-grid pre,
.terminal pre {
  white-space: pre-wrap;
  word-break: break-word;
}

.terminal {
  background: #1f211d;
  color: #f5f0e5;
  padding: 22px;
}

.terminal pre {
  margin: 0;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 28px 0;
  background: #fffdf8;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  font-weight: 800;
}

@media (max-width: 900px) {
  .nav {
    align-items: flex-start;
  }

  .nav-links {
    display: none;
  }

  .hero-content {
    padding-top: 10vh;
  }

  .hero h1 {
    font-size: 4rem;
  }

  h2 {
    font-size: 2.45rem;
  }

  .intro-grid,
  .install-grid,
  .safety-grid,
  .topology-layout,
  .feature-grid,
  .prompt-grid,
  .confidence-grid,
  .steps {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .hero h1 {
    font-size: 3.1rem;
  }

  h2 {
    font-size: 2rem;
  }

  .topology-diagram {
    min-height: auto;
    grid-template-columns: 1fr;
    grid-template-rows: none;
  }

  .transport-line,
  .artifact-node,
  .monitor-node {
    grid-column: auto;
  }
}