/* 🆗 Overseer Kit Track N landing — static, no external dependencies */

:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --text: #e7ecf3;
  --muted: #9aa8bc;
  --accent: #3d9a6a;
  --accent-dim: #2a6b4a;
  --border: #2d3a4d;
  --badge-dogfood: #2563eb;
  --badge-reference: #7c3aed;
  --badge-aspirational: #64748b;
  --layer-l0: #60a5fa;
  --layer-l1: #34d399;
  --layer-l2: #fbbf24;
  --layer-l3: #a78bfa;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "Cascadia Code", "SF Mono", monospace;
  --max-width: 52rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

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

a:hover {
  color: #5cb88a;
}

header.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  padding: 0.75rem 1.5rem;
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-header nav {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}

.site-header .brand {
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--text);
  text-decoration: none;
}

.site-header .nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.9375rem;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

section {
  margin-bottom: 3rem;
  scroll-margin-top: 4rem;
}

h1 {
  font-size: 2.25rem;
  line-height: 1.2;
  margin: 0 0 0.75rem;
}

h2 {
  font-size: 1.5rem;
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

h3 {
  font-size: 1.125rem;
  margin: 1.5rem 0 0.5rem;
}

.lead {
  font-size: 1.25rem;
  color: var(--muted);
  margin: 0 0 1.5rem;
}

.sublead {
  color: var(--muted);
  margin: 0 0 1.5rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.btn {
  display: inline-block;
  padding: 0.625rem 1.125rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
  border: 1px solid transparent;
}

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

.btn-primary:hover {
  background: var(--accent-dim);
  color: #fff;
}

.btn-secondary {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.layer-stack {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 1.5rem 0;
}

.layer {
  padding: 1rem 1.25rem;
  border-radius: 8px;
  border-left: 4px solid;
  background: var(--surface);
}

.layer-l3 { border-color: var(--layer-l3); }
.layer-l2 { border-color: var(--layer-l2); }
.layer-l1 { border-color: var(--layer-l1); }
.layer-l0 { border-color: var(--layer-l0); }

.layer strong {
  display: block;
  margin-bottom: 0.25rem;
}

.funnel {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  margin: 1.5rem 0;
  font-weight: 600;
}

.funnel-step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1.25rem;
}

.funnel-arrow {
  color: var(--muted);
  font-size: 1.25rem;
}

pre,
code {
  font-family: var(--mono);
  font-size: 0.875rem;
}

pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
}

ul.compact {
  padding-left: 1.25rem;
  margin: 0.5rem 0 1rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
}

.card h3 {
  margin-top: 0;
}

.badge {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  margin-bottom: 0.5rem;
}

.badge-dogfood {
  background: rgba(37, 99, 235, 0.2);
  color: #93c5fd;
}

.badge-reference {
  background: rgba(124, 58, 237, 0.2);
  color: #c4b5fd;
}

.badge-aspirational {
  background: rgba(100, 116, 139, 0.25);
  color: #cbd5e1;
}

.diagram {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  margin: 1rem 0;
  font-family: var(--mono);
  font-size: 0.8125rem;
  line-height: 1.5;
  white-space: pre;
  overflow-x: auto;
}

footer.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.875rem;
}

footer a {
  margin: 0 0.5rem;
}

.scenario-detail {
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.scenario-detail:last-child {
  border-bottom: none;
}

@media (max-width: 40rem) {
  h1 {
    font-size: 1.75rem;
  }

  .funnel {
    flex-direction: column;
    align-items: stretch;
  }

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