/* AgentRecon — landing site
 * Plain CSS, no framework. Brand tokens hard-coded from
 * agentrecon-rs/brand/palette.json + type.json.
 * Designed to ship as static files with zero build step.
 */

:root {
  /* Brand — primary slate blue */
  --primary-50:  #f5f7fb;
  --primary-100: #e6ecf5;
  --primary-400: #6e87b8;
  --primary-500: #4c669a;
  --primary-600: #3a5080;
  --primary-700: #2a3c62;
  --primary-900: #141c33;

  /* Brand — warm neutral */
  --neutral-0:   #ffffff;
  --neutral-50:  #faf9f7;
  --neutral-100: #f2efea;
  --neutral-200: #e4e0d8;
  --neutral-300: #ccc6ba;
  --neutral-400: #a39c8f;
  --neutral-500: #807968;
  --neutral-700: #443f35;
  --neutral-900: #1a1814;
  --neutral-950: #0d0c0a;

  /* Brand — semantic */
  --success-500: #51a07a;
  --warning-500: #c59b55;
  --danger-500:  #b85245;

  /* Layout */
  --max-w: 64rem;
  --pad-x: clamp(1.25rem, 4vw, 2rem);
  --radius: 0.5rem;

  /* Theme — light default */
  color-scheme: light dark;
  --bg: var(--neutral-0);
  --surface: var(--neutral-50);
  --border: var(--neutral-200);
  --fg: var(--neutral-900);
  --fg-muted: var(--neutral-500);
  --cta-bg: var(--primary-500);
  --cta-bg-hover: var(--primary-600);
  --cta-fg: var(--neutral-0);
  --link: var(--primary-600);
  --code-bg: var(--neutral-100);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: var(--neutral-950);
    --surface: var(--neutral-900);
    --border: var(--neutral-700);
    --fg: var(--neutral-100);
    --fg-muted: var(--neutral-400);
    --cta-bg: var(--primary-400);
    --cta-bg-hover: var(--primary-500);
    --cta-fg: var(--neutral-0);
    --link: var(--primary-400);
    --code-bg: #1a1f2e;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui,
               "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

code, pre, kbd, samp {
  font-family: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.92em;
}

a {
  color: var(--link);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}
a:hover { text-decoration-thickness: 2px; }

/* Layout shell */
.shell {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

/* Header */
header {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
}
header .shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.wordmark {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  color: var(--fg);
  text-decoration: none;
}
.wordmark svg { display: block; }
.wordmark:hover { text-decoration: none; }

.nav-links {
  display: flex;
  gap: 1.5rem;
  font-size: 0.92rem;
}
.nav-links a {
  color: var(--fg-muted);
  text-decoration: none;
}
.nav-links a:hover { color: var(--fg); }

/* Hero */
.hero {
  padding: 4.5rem 0 3.5rem;
}
.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary-600);
  background: var(--primary-50);
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
}
@media (prefers-color-scheme: dark) {
  .eyebrow {
    color: var(--primary-100);
    background: rgba(76, 102, 154, 0.15);
  }
}
h1 {
  font-size: clamp(2.25rem, 5.5vw, 3.75rem);
  line-height: 1.1;
  letter-spacing: -0.025em;
  font-weight: 700;
  margin: 0 0 0.85rem;
  color: var(--fg);
}
.strapline {
  font-size: clamp(1.25rem, 2.4vw, 1.5rem);
  line-height: 1.35;
  font-weight: 600;
  color: var(--primary-600);
  margin: 0 0 1.5rem;
  letter-spacing: -0.01em;
}
@media (prefers-color-scheme: dark) {
  .strapline { color: var(--primary-400); }
}
.lede {
  font-size: clamp(1.1rem, 2vw, 1.25rem);
  line-height: 1.55;
  max-width: 38rem;
  margin: 0 0 2rem;
  color: var(--fg-muted);
}
.lede strong { color: var(--fg); font-weight: 600; }

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2.25rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 120ms, border-color 120ms;
}
.btn-primary {
  background: var(--cta-bg);
  color: var(--cta-fg);
}
.btn-primary:hover {
  background: var(--cta-bg-hover);
  text-decoration: none;
}
.btn-secondary {
  background: transparent;
  color: var(--fg);
  border-color: var(--border);
}
.btn-secondary:hover {
  background: var(--surface);
  text-decoration: none;
}

.cta-fineprint {
  font-size: 0.85rem;
  color: var(--fg-muted);
  margin: 1.25rem 0 0;
  max-width: 36rem;
  line-height: 1.55;
}
.cta-fineprint a { color: var(--fg-muted); }
.cta-fineprint a:hover { color: var(--fg); }

/* Sections */
section.block {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
}
h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
  font-weight: 700;
  margin: 0 0 1.5rem;
}
h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 1.75rem 0 0.5rem;
}

/* Install snippets */
.install-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
.snippet {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  font-family: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.88rem;
  line-height: 1.5;
  overflow-x: auto;
  white-space: pre;
  position: relative;
}
.snippet .label {
  display: block;
  font-family: -apple-system, sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 0.4rem;
}

/* Feature list */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1.5rem 2rem;
  margin: 1.5rem 0 0;
}
.feature-grid > div {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.feature-grid strong {
  font-weight: 600;
  color: var(--fg);
}
.feature-grid span {
  color: var(--fg-muted);
  font-size: 0.95rem;
}

/* Tiers preview */
.tiers {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}
.tier {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  background: var(--surface);
}
.tier.featured {
  border-color: var(--primary-500);
  border-width: 2px;
  padding: calc(1.5rem - 1px);
}
.tier-name {
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}
.tier-status {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  display: inline-block;
  margin-left: 0.4rem;
  vertical-align: middle;
}
.tier-status.now {
  background: var(--success-500);
  color: var(--neutral-0);
}
.tier-status.soon {
  background: var(--neutral-200);
  color: var(--neutral-700);
}
.tier p {
  color: var(--fg-muted);
  font-size: 0.95rem;
  margin: 0.5rem 0 0;
}

/* Prose (for /eula, etc.) */
.prose {
  max-width: 42rem;
  margin: 0 auto;
  padding: 3rem 0;
}
.prose h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); margin-bottom: 0.5rem; }
.prose h2 { margin-top: 2.5rem; }
.prose h3 { margin-top: 2rem; }
.prose p, .prose li { line-height: 1.7; }
.prose code {
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 0.25rem;
}
.prose hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}
.muted-note {
  color: var(--fg-muted);
  font-size: 0.92rem;
  margin-top: 0.5rem;
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 3rem 0 2.5rem;
  margin-top: 4rem;
  color: var(--fg-muted);
  font-size: 0.9rem;
}
footer a {
  color: var(--fg-muted);
  text-decoration: none;
}
footer a:hover {
  color: var(--fg);
  text-decoration: underline;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 2.5rem;
}
@media (max-width: 720px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem 1.5rem;
  }
}
@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  color: var(--fg);
  font-size: 1rem;
}
.footer-tagline {
  color: var(--fg-muted);
  font-size: 0.9rem;
}
.footer-muted {
  color: var(--fg-muted);
  font-size: 0.82rem;
  margin-top: 0.5rem;
}
.footer-heading {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg);
  margin-bottom: 0.35rem;
}