:root {
  --bg-cream: #F5F1E8;
  --type-ink: #1A1A1A;
  --accent-cobalt: #1E3AE5;
  --bg-inverse: #0A0A0A;
  --type-inverse: #F5F1E8;

  --font-serif: "Source Serif 4", Georgia, serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --spacing-section: 5rem;
  --max-width-prose: 720px;
}

/* Base Reset & Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-cream);
  color: var(--type-ink);
  font-family: var(--font-serif);
  font-size: 1.125rem; /* 18px */
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  
  /* Removed noise grain overlay due to rendering bugs in some browsers */
}

@media (min-width: 768px) {
  body {
    font-size: 1.25rem; /* 20px */
  }
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

p {
  margin-bottom: 1.5rem;
}

a {
  color: var(--accent-cobalt);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Layout Utilities */
.container {
  max-width: var(--max-width-prose);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: var(--spacing-section) 0;
}

.full-bleed {
  width: 100%;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

@media (min-width: 900px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

@media (min-width: 900px) {
  .grid-3 {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

/* Typography Utilities */
.font-mono {
  font-family: var(--font-mono);
}

.text-cobalt {
  color: var(--accent-cobalt);
}

.text-center {
  text-align: center;
}

.text-small {
  font-size: 0.875rem; /* 14px */
}

.text-opacity-70 {
  opacity: 0.7;
}

.text-opacity-80 {
  opacity: 0.8;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: opacity 0.2s;
}

.btn:hover {
  opacity: 0.9;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--accent-cobalt);
  color: var(--bg-cream);
}

.btn-inverse {
  background-color: var(--bg-cream);
  color: var(--accent-cobalt);
}

/* Placeholders */
.placeholder {
  border: 1px dashed var(--accent-cobalt);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--type-ink);
}

/* Sections */

/* 1. Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 4rem 0;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4rem;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

@media (min-width: 900px) {
  .hero-content {
    grid-template-columns: 1fr 1.25fr;
    gap: 3rem;
    max-width: 1320px;
  }
}

.hero-title {
  font-size: clamp(3rem, 5.5vw, 5.5rem);
  line-height: 0.95;
  margin-bottom: 1.75rem;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: 3rem;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.hero-link {
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.hero-visual .placeholder {
  aspect-ratio: 4 / 3;
}

/* Mission Control screenshot in the hero. The SVG is naturally ~1400×820;
 * we let it scale to the column width with a soft drop-shadow so the dark
 * dashboard reads as a window floating above the cream page. */
.hero-mission-control img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 4px;
  box-shadow:
    0 1px 2px rgba(26, 26, 26, 0.08),
    0 20px 60px rgba(26, 26, 26, 0.18);
}
.hero-visual-caption {
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(26, 26, 26, 0.55);
  letter-spacing: 0.04em;
  text-align: center;
}

/* Full-bleed visual band — used by the hierarchy-vs-swarm SVG and the
 * orchestrator-loop GIF. The image is constrained but the band runs
 * edge-to-edge to give the visual weight without busting the prose column. */
.hierarchy-visual,
.run-gif {
  margin: 3rem auto;
  text-align: center;
}
.hierarchy-visual img,
.run-gif img {
  display: block;
  margin: 0 auto;
  max-width: min(1100px, 92vw);
  width: 100%;
  height: auto;
  border-radius: 4px;
  box-shadow:
    0 1px 2px rgba(26, 26, 26, 0.06),
    0 12px 36px rgba(26, 26, 26, 0.12);
}
.run-caption {
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-align: center;
  color: rgba(26, 26, 26, 0.6);
  letter-spacing: 0.03em;
}

/* Inline-code chip — for commands referenced in prose, e.g. `drone-graph serve`. */
.inline-code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: 1px 7px;
  border-radius: 3px;
  background: rgba(30, 58, 229, 0.08);
  color: var(--accent-cobalt);
  white-space: nowrap;
}

/* Larger code block — used in the OS band to show the one-line install command
 * as a concrete proof point. Sits on the cobalt band, so we invert the chip. */
.code-block {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 1rem;
  padding: 12px 22px;
  border-radius: 4px;
  background: rgba(245, 241, 232, 0.12);
  color: var(--bg-cream);
  border: 1px solid rgba(245, 241, 232, 0.25);
  letter-spacing: 0.02em;
}
.code-block .prompt {
  color: rgba(245, 241, 232, 0.55);
  margin-right: 8px;
  user-select: none;
}

/* Terminal-window frame around the orchestrator GIF. Subtle titlebar with
 * three dots and a label, drop shadow underneath the GIF. */
.terminal-frame {
  margin: 0;
  border-radius: 6px;
  overflow: hidden;
  box-shadow:
    0 1px 2px rgba(26, 26, 26, 0.08),
    0 14px 44px rgba(26, 26, 26, 0.18);
  background: #070a0f;
}

/* See-it-run three-stage narrative grid. */
.run-grid {
  margin: 2.5rem auto;
  max-width: min(1320px, 94vw);
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}
@media (min-width: 900px) {
  .run-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
}
.run-panel {
  display: flex;
  flex-direction: column;
}
/* All three panels share the same aspect ratio so they line up cleanly.
 * The terminal frame is a flex column with a fixed titlebar; the GIF inside
 * fills the remaining height with object-fit so its native 2:1 aspect crops
 * cleanly to match the SVGs at 11:7. */
.run-panel-svg,
.run-panel .terminal-frame {
  display: block;
  width: 100%;
  aspect-ratio: 11 / 7;
  border-radius: 6px;
  box-shadow:
    0 1px 2px rgba(26, 26, 26, 0.08),
    0 14px 44px rgba(26, 26, 26, 0.18);
}
.run-panel .terminal-frame {
  display: flex;
  flex-direction: column;
}
.run-panel .terminal-frame .terminal-titlebar {
  flex-shrink: 0;
}
.run-panel .terminal-frame img {
  flex: 1;
  width: 100%;
  height: auto;
  min-height: 0;
  object-fit: cover;
  object-position: top center;
  display: block;
}
.run-panel-caption {
  margin-top: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-align: center;
  color: rgba(26, 26, 26, 0.65);
  letter-spacing: 0.04em;
}
.run-panel-caption .run-num {
  color: var(--accent-cobalt);
  margin-right: 0.35em;
  font-weight: 500;
}

/* Read-deeper list: three doc/PDF links rendered as quiet card rows. */
.deeper-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
  max-width: 640px;
}
.deeper-list a {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 14px 18px;
  border: 1px solid rgba(26, 26, 26, 0.12);
  border-radius: 4px;
  color: var(--type-ink);
  text-decoration: none;
  transition: border-color 120ms ease, background-color 120ms ease;
}
.deeper-list a:hover {
  border-color: var(--accent-cobalt);
  background: rgba(30, 58, 229, 0.04);
  text-decoration: none;
}
.deeper-list .deeper-title {
  font-size: 1rem;
  font-weight: 500;
}
.deeper-list .deeper-meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: rgba(26, 26, 26, 0.55);
  letter-spacing: 0.02em;
}
.terminal-titlebar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  background: #11151f;
  border-bottom: 1px solid #1f2532;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(154, 164, 184, 0.85);
  letter-spacing: 0.04em;
}
.terminal-titlebar .dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: rgba(154, 164, 184, 0.35);
}
.terminal-titlebar .dot:nth-child(1) { background: #e26b43; }
.terminal-titlebar .dot:nth-child(2) { background: #f5b53c; }
.terminal-titlebar .dot:nth-child(3) { background: #7fe5d0; }
.terminal-titlebar .terminal-title {
  margin-left: 10px;
  flex: 1;
  text-align: center;
}
.terminal-frame img {
  display: block;
  width: 100%;
  height: auto;
}

/* 2. The Problem */
.problem-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
}

.pull-quote {
  margin-top: 4rem;
  font-family: var(--font-mono);
  font-size: 1rem;
}

/* 3. The Thesis */
.thesis {
  text-align: center;
}

.thesis-statement {
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  line-height: 1.2;
  margin-bottom: 3rem;
  font-weight: 400;
}

.thesis-caption {
  font-family: var(--font-mono);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto;
  color: rgba(26, 26, 26, 0.7);
}

/* 4. The Swarm (Inverse) */
.inverse-band {
  background-color: var(--bg-inverse);
  color: var(--type-inverse);
}

.inverse-title {
  font-size: clamp(4rem, 8vw, 7rem);
  line-height: 0.95;
  margin-bottom: 3rem;
  letter-spacing: -0.02em;
}

.inverse-quote {
  margin-top: 4rem;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: rgba(245, 241, 232, 0.8);
}

/* 5. Architecture */
.architecture-visual {
  margin: 4rem 0;
  width: 100%;
}

.architecture-visual .placeholder {
  width: 100%;
  max-width: 800px;
  height: 500px;
  margin: 0 auto;
}

/* 6. Collective Mind components */
.cm-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

@media (min-width: 900px) {
  .cm-grid {
    grid-template-columns: repeat(6, 1fr);
  }
  .cm-grid > * {
    grid-column: span 2;
  }
  .cm-grid > *:nth-child(4) {
    grid-column: 2 / span 2;
  }
  .cm-grid > *:nth-child(5) {
    grid-column: 4 / span 2;
  }
}

@media (min-width: 1200px) {
  .cm-grid {
    grid-template-columns: repeat(5, 1fr);
  }
  .cm-grid > *,
  .cm-grid > *:nth-child(4),
  .cm-grid > *:nth-child(5) {
    grid-column: auto;
  }
}

.graph-column {
  display: flex;
  flex-direction: column;
}

.graph-visual {
  margin-bottom: 1.5rem;
}

.graph-visual .placeholder {
  height: 160px;
}

.graph-title {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.graph-caption {
  margin-top: 4rem;
  font-family: var(--font-mono);
  font-size: 1rem;
  text-align: center;
}

/* 7. Worked Example */
.example-list {
  list-style-type: none;
  counter-reset: example-counter;
}

.example-item {
  position: relative;
  padding-left: 3rem;
  margin-bottom: 2rem;
}

.example-item::before {
  counter-increment: example-counter;
  content: counter(example-counter) ".";
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  color: var(--accent-cobalt);
  font-size: 1.25rem;
}

.example-item h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.example-item p {
  margin-bottom: 0;
}

.example-caption {
  margin-top: 4rem;
  font-family: var(--font-mono);
  font-size: 1rem;
}

/* 8. Use Cases & 9. Audiences */
.list-unstyled {
  list-style-type: none;
}

.list-unstyled li {
  margin-bottom: 0.75rem;
  padding-left: 1.5rem;
  position: relative;
}

.list-unstyled li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent-cobalt);
}

/* 10. Open Source Callout */
.os-band {
  background-color: var(--accent-cobalt);
  color: var(--bg-cream);
  text-align: center;
}

.os-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
}

.os-actions {
  margin-top: 3rem;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.os-link {
  color: var(--bg-cream);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

/* 11. Footer */
.footer {
  padding: 4rem 0;
  text-align: center;
  font-family: var(--font-mono);
  color: rgba(26, 26, 26, 0.6);
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--type-ink);
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.footer-links a {
  color: inherit;
}

.footer-tagline {
  font-size: 0.75rem;
  margin-bottom: 1rem;
}

.footer-copyright {
  font-size: 0.75rem;
}

/* Animations */
.fade-in {
  /* Provide a fallback so content is visible if JS fails or observers fail */
  opacity: 1;
}

/* We'll use a class added by JS to hide elements before they scroll into view */
.js-enabled .fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.js-enabled .fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}