:root {
  --bg: #0a0e1a;
  --bg-card: #111827;
  --bg-code: #1a2035;
  --gold: #f7931a;
  --gold-dim: #c77a15;
  --gold-glow: rgba(247, 147, 26, 0.15);
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --border: #1e293b;
  --radius: 12px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(247, 147, 26, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(247, 147, 26, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

header, main, footer { position: relative; z-index: 1; }

/* Hero */
.hero {
  text-align: center;
  padding: 5rem 1.5rem 3rem;
  max-width: 700px;
  margin: 0 auto;
}

.logo {
  border-radius: 50%;
  box-shadow: 0 0 60px rgba(247, 147, 26, 0.25), 0 0 120px rgba(247, 147, 26, 0.08);
  margin-bottom: 1.5rem;
}

h1 {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--gold), #fbbf24);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tagline {
  font-size: 1.25rem;
  color: var(--text-dim);
  margin-top: 0.25rem;
}

.sub {
  margin-top: 0.75rem;
  color: var(--text-dim);
  font-size: 0.95rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.badges {
  margin-top: 1.5rem;
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

.badges a { text-decoration: none; }
.badges img { height: 22px; }

/* Sections */
main {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

section { margin-top: 4rem; }

h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--gold);
}

/* Install */
.code-block {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.code-label {
  background: var(--border);
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
  color: var(--text-dim);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

pre {
  padding: 1.25rem;
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.7;
}

code {
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  color: var(--gold);
}

pre code { color: var(--text); }

.key-links {
  margin-top: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.key-links p {
  color: var(--text-dim);
  font-size: 0.9rem;
}

.key-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.85rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: border-color 0.2s, background 0.2s;
}

.key-links a:hover {
  border-color: var(--gold);
  background: var(--gold-glow);
}

.rpm, .optional {
  font-size: 0.7rem;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-weight: 600;
}

.rpm {
  background: rgba(247, 147, 26, 0.15);
  color: var(--gold);
}

.optional {
  background: rgba(148, 163, 184, 0.15);
  color: var(--text-dim);
}

/* Tools Grid */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.tool-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.tool-category h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--gold);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.8rem;
}

.tool-category ul {
  list-style: none;
}

.tool-category li {
  padding: 0.35rem 0;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 0.85rem;
  border-bottom: 1px solid rgba(30, 41, 59, 0.5);
}

.tool-category li:last-child { border-bottom: none; }

.tool-category li code {
  font-size: 0.78rem;
  white-space: nowrap;
  flex-shrink: 0;
}

.tool-category li span {
  color: var(--text-dim);
  font-size: 0.78rem;
}

/* Architecture */
.arch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

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

.arch-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.arch-card p {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-top: 0.75rem;
}

.arch-card table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.arch-card td {
  padding: 0.35rem 0;
  border-bottom: 1px solid rgba(30, 41, 59, 0.5);
}

.arch-card tr:last-child td { border-bottom: none; }

.ttl {
  text-align: right;
  color: var(--gold);
  font-weight: 600;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.8rem;
}

/* Flow diagram */
.flow {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.flow-step {
  padding: 0.35rem 0.7rem;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid var(--border);
}

.flow-step.active { background: var(--gold-glow); color: var(--gold); border-color: var(--gold-dim); }
.flow-step.primary { background: rgba(34, 197, 94, 0.1); color: #22c55e; border-color: rgba(34, 197, 94, 0.3); }
.flow-step.secondary { background: rgba(59, 130, 246, 0.1); color: #3b82f6; border-color: rgba(59, 130, 246, 0.3); }
.flow-step.stale { background: rgba(148, 163, 184, 0.1); color: var(--text-dim); }

.flow-arrow {
  color: var(--text-dim);
  font-size: 0.9rem;
}

/* Data Sources */
.source-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.25rem;
}

.source {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-align: center;
}

.source h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.role {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  background: var(--gold-glow);
  color: var(--gold);
  margin-bottom: 0.5rem;
}

.source p {
  color: var(--text-dim);
  font-size: 0.85rem;
}

/* Footer */
footer {
  text-align: center;
  padding: 3rem 1.5rem;
  border-top: 1px solid var(--border);
  max-width: 960px;
  margin: 0 auto;
}

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

.footer-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--gold); }

footer p {
  color: var(--text-dim);
  font-size: 0.8rem;
}

footer p a {
  color: var(--gold);
  text-decoration: none;
}

/* Responsive */
@media (max-width: 640px) {
  h1 { font-size: 2.25rem; }
  .hero { padding-top: 3rem; }
  .tool-grid, .arch-grid, .source-grid {
    grid-template-columns: 1fr;
  }
}