:root {
  --bg: #09090b;
  --bg-card: #18181b;
  --border: #27272a;
  --text: #fafafa;
  --muted: #a1a1aa;
  --accent: #22c55e;
  --accent-dim: #16a34a;
  --max-w: 72rem;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(9,9,11,0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max-w); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.75rem 1rem; gap: 1rem;
}
.nav-logo { font-weight: 700; color: var(--text); text-decoration: none; font-size: 1.1rem; }
.nav-links { display: none; list-style: none; gap: 0.25rem; }
@media (min-width: 768px) { .nav-links { display: flex; } }
.nav-links a {
  color: var(--muted); padding: 0.5rem 0.75rem; border-radius: 0.5rem;
  font-size: 0.875rem; text-decoration: none;
}
.nav-links a:hover, .nav-links a.active { color: var(--accent); background: var(--bg-card); text-decoration: none; }
.nav-mobile { display: flex; gap: 0.5rem; overflow-x: auto; padding: 0 1rem 0.5rem; }
@media (min-width: 768px) { .nav-mobile { display: none; } }
.nav-mobile a {
  white-space: nowrap; font-size: 0.75rem; color: var(--muted);
  border: 1px solid var(--border); padding: 0.25rem 0.75rem; border-radius: 999px;
  text-decoration: none;
}
.btn {
  display: inline-block; background: var(--accent); color: #000;
  font-weight: 600; padding: 0.5rem 1rem; border-radius: 0.5rem;
  text-decoration: none; border: none; cursor: pointer; font-size: 0.875rem;
}
.btn:hover { background: var(--accent-dim); color: #fff; text-decoration: none; }
.btn-outline { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
main { flex: 1; padding: 2rem 0; }
.page-narrow { max-width: 48rem; margin: 0 auto; padding: 0 1rem; }
.page-wide { max-width: var(--max-w); margin: 0 auto; padding: 0 1rem; }
h1 { font-size: 2rem; font-weight: 800; margin-bottom: 0.75rem; line-height: 1.2; }
@media (min-width: 768px) { h1 { font-size: 2.5rem; } }
h2 { font-size: 1.5rem; font-weight: 700; margin: 2rem 0 1rem; color: var(--text); }
p { color: var(--muted); margin-bottom: 1rem; }
ul, ol { color: var(--muted); margin-bottom: 1rem; padding-left: 1.5rem; }
li { margin-bottom: 0.5rem; }
.breadcrumb { font-size: 0.875rem; color: var(--muted); margin-bottom: 1.5rem; }
.breadcrumb a { color: var(--muted); }
.last-updated { font-size: 0.875rem; color: #71717a; margin-bottom: 1.5rem; }
.quick-answer {
  border-left: 4px solid var(--accent); background: rgba(34,197,94,0.1);
  padding: 1.25rem; border-radius: 0 0.75rem 0.75rem 0; margin-bottom: 2rem;
}
.quick-answer-label { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; color: var(--accent); margin-bottom: 0.25rem; }
.quick-answer p { color: #e4e4e7; margin: 0; font-size: 1.05rem; }
.hero { text-align: center; padding: 2rem 0 3rem; }
.hero-badge { font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: var(--accent); margin-bottom: 0.75rem; }
.hero-btns { display: flex; flex-wrap: wrap; gap: 0.75rem; justify-content: center; margin-top: 1.5rem; }
.stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-bottom: 2rem; }
@media (min-width: 768px) { .stats { grid-template-columns: repeat(4, 1fr); } }
.stat { background: var(--bg-card); border: 1px solid var(--border); border-radius: 0.75rem; padding: 1rem; text-align: center; }
.stat-label { font-size: 0.7rem; text-transform: uppercase; color: #71717a; }
.stat-value { font-size: 1.25rem; font-weight: 700; color: var(--accent); margin-top: 0.25rem; }
.card-grid { display: grid; gap: 1rem; grid-template-columns: 1fr; margin-bottom: 2rem; }
@media (min-width: 640px) { .card-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .card-grid { grid-template-columns: repeat(3, 1fr); } }
.card {
  background: rgba(24,24,27,0.5); border: 1px solid var(--border);
  border-radius: 0.75rem; padding: 1.25rem; text-decoration: none; color: inherit;
}
.card:hover { border-color: rgba(34,197,94,0.5); text-decoration: none; }
.card-icon { font-size: 1.5rem; }
.card h3 { color: var(--text); margin: 0.75rem 0 0.5rem; font-size: 1.1rem; }
.card p { font-size: 0.875rem; margin: 0; }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 0.75rem; margin-bottom: 1.5rem; }
table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
thead { background: var(--bg-card); }
th { padding: 0.75rem 1rem; text-align: left; color: #d4d4d8; font-weight: 600; }
td { padding: 0.75rem 1rem; border-top: 1px solid var(--border); color: var(--muted); }
td code { font-family: monospace; font-weight: 700; color: var(--accent); }
.badge-active { font-size: 0.65rem; background: rgba(34,197,94,0.2); color: var(--accent); padding: 0.15rem 0.5rem; border-radius: 999px; margin-left: 0.5rem; }
.copy-btn { background: var(--accent); color: #000; border: none; padding: 0.35rem 0.75rem; border-radius: 0.5rem; font-size: 0.8rem; font-weight: 600; cursor: pointer; }
.copy-btn.copied { background: #166534; color: #fff; }
.faq { margin-top: 2rem; }
.faq-item { border: 1px solid var(--border); border-radius: 0.75rem; margin-bottom: 0.75rem; overflow: hidden; }
.faq-q { width: 100%; text-align: left; background: rgba(24,24,27,0.5); border: none; color: var(--text); padding: 1rem 1.25rem; font-weight: 600; cursor: pointer; font-size: 1rem; }
.faq-a { padding: 0 1.25rem 1rem; color: var(--muted); display: none; }
.faq-item.open .faq-a { display: block; }
.related { margin-top: 2rem; border: 1px solid var(--border); border-radius: 0.75rem; padding: 1.5rem; background: rgba(24,24,27,0.3); }
.related-grid { display: grid; gap: 0.75rem; grid-template-columns: 1fr; }
@media (min-width: 640px) { .related-grid { grid-template-columns: 1fr 1fr; } }
.related-link { border: 1px solid var(--border); border-radius: 0.5rem; padding: 1rem; text-decoration: none; display: block; }
.related-link:hover { border-color: var(--accent); text-decoration: none; }
.related-link strong { color: var(--accent); display: block; }
.related-link span { font-size: 0.875rem; color: var(--muted); }
.tier-block { border-radius: 0.75rem; padding: 1.5rem; margin-bottom: 1.5rem; border: 1px solid; }
.tier-ss { border-color: rgba(250,204,21,0.3); background: rgba(250,204,21,0.05); }
.tier-s { border-color: rgba(192,132,252,0.3); background: rgba(192,132,252,0.05); }
.tier-a { border-color: rgba(96,165,250,0.3); background: rgba(96,165,250,0.05); }
.tier-b { border-color: var(--border); background: rgba(24,24,27,0.5); }
.starter-block { border: 1px solid var(--border); border-radius: 0.75rem; padding: 1.5rem; margin-bottom: 1.5rem; background: rgba(24,24,27,0.4); }
.footer { border-top: 1px solid var(--border); background: var(--bg); padding: 2rem 0 1rem; margin-top: auto; }
.footer-grid { max-width: var(--max-w); margin: 0 auto; padding: 0 1rem; display: grid; gap: 2rem; grid-template-columns: 1fr; }
@media (min-width: 768px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr; } }
.footer h4 { margin-bottom: 0.75rem; font-size: 1rem; }
.footer a { display: block; color: var(--muted); font-size: 0.875rem; margin-bottom: 0.5rem; text-decoration: none; }
.footer a:hover { color: var(--accent); }
.footer-bottom { text-align: center; padding: 1rem; font-size: 0.75rem; color: #52525b; border-top: 1px solid var(--border); margin-top: 2rem; }
.steps { list-style: none; padding: 0; }
.steps li { display: flex; gap: 1rem; margin-bottom: 1rem; }
.step-num {
  width: 2rem; height: 2rem; border-radius: 999px; background: var(--accent);
  color: #000; font-weight: 700; display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; font-size: 0.875rem;
}

/* Rich content */
.callout {
  border: 1px solid var(--border); border-radius: 0.75rem;
  padding: 1.25rem; margin-bottom: 1.5rem; background: rgba(24,24,27,0.5);
}
.callout-tip { border-left: 4px solid var(--accent); }
.callout-warn { border-left: 4px solid #f59e0b; }
.content-block { margin-bottom: 2.5rem; }
.content-block h2 { margin-top: 0; }
.toc { background: var(--bg-card); border: 1px solid var(--border); border-radius: 0.75rem; padding: 1.25rem; margin-bottom: 2rem; }
.toc ol { margin: 0.5rem 0 0; }
.toc a { color: var(--muted); }
.toc a:hover { color: var(--accent); }
.two-col { display: grid; gap: 1.5rem; }
@media (min-width: 768px) { .two-col { grid-template-columns: 1fr 1fr; } }
.type-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 0.75rem; margin-bottom: 1.5rem; }
.type-cell { border: 1px solid var(--border); border-radius: 0.5rem; padding: 0.75rem; text-align: center; font-size: 0.875rem; }
.type-strong { color: #4ade80; }
.type-weak { color: #f87171; }
.tag { display: inline-block; font-size: 0.7rem; padding: 0.15rem 0.5rem; border-radius: 999px; background: var(--bg-card); border: 1px solid var(--border); margin-right: 0.25rem; }
.priority-high { color: #4ade80; font-weight: 600; }
.priority-med { color: #fbbf24; }
.loop-grid { display: grid; gap: 1rem; grid-template-columns: 1fr; }
@media (min-width: 640px) { .loop-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .loop-grid { grid-template-columns: repeat(3, 1fr); } }
.loop-card { border: 1px solid var(--border); border-radius: 0.75rem; padding: 1.25rem; background: rgba(24,24,27,0.4); }
.loop-card h3 { color: var(--accent); margin: 0 0 0.5rem; font-size: 1rem; }
.loop-card p { font-size: 0.875rem; margin: 0; }