:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface2: #22263a;
  --border: #2d3148;
  --text: #e2e8f0;
  --muted: #6b7280;
  --green: #22c55e;
  --yellow: #eab308;
  --blue: #3b82f6;
  --orange: #f97316;
  --purple: #a855f7;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  font-size: 15px;
  line-height: 1.6;
}

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

code, pre {
  font-family: 'Cascadia Code', 'Fira Code', 'JetBrains Mono', 'Consolas', monospace;
  font-size: 13px;
}

/* ---- Nav ---- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.nav-brand {
  font-weight: 700;
  font-size: 15px;
  color: var(--text);
  letter-spacing: -0.02em;
}
.nav-links {
  display: flex;
  gap: 20px;
  font-size: 13px;
}
.nav-links a { color: var(--muted); }
.nav-links a:hover { color: var(--text); text-decoration: none; }

/* ---- Hero ---- */
.hero {
  max-width: 820px;
  margin: 0 auto;
  padding: 72px 24px 48px;
}
.hero-brand {
  font-size: 42px;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: var(--text);
  margin-bottom: 12px;
}
.hero-tagline {
  font-size: 17px;
  color: var(--muted);
  margin-bottom: 20px;
}
.hero-desc {
  font-size: 16px;
  color: var(--text);
  max-width: 560px;
  margin-bottom: 28px;
  line-height: 1.65;
}
.hero-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.btn {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s;
}
.btn:hover { opacity: 0.85; text-decoration: none; }
.btn-primary { background: var(--blue); color: #fff; }
.btn-secondary { background: var(--surface); color: var(--text); border: 1px solid var(--border); }

/* ---- Tiers ---- */
.tiers-section {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px 60px;
}
.section-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 20px;
}
.tiers-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
@media (max-width: 640px) { .tiers-grid { grid-template-columns: 1fr; } }
.tier-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
}
.tier-card.featured {
  border-color: var(--blue);
  background: color-mix(in srgb, var(--blue) 6%, var(--surface));
}
.tier-price {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 4px;
}
.tier-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}
.tier-features {
  list-style: none;
  font-size: 13px;
  line-height: 1.8;
  color: var(--text);
}
.tier-features li::before {
  content: "·  ";
  color: var(--muted);
}

/* ---- Quickstart ---- */
.quickstart-section {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px 60px;
}
.example-block {
  margin-bottom: 32px;
}
.example-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--orange);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.code-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
  overflow-x: auto;
}
.code-block pre {
  color: var(--text);
  white-space: pre;
}
.code-comment { color: var(--muted); }
.code-string { color: var(--green); }
.code-keyword { color: var(--blue); }

/* ---- Social proof ---- */
.proof-section {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px 60px;
}
.rankings-img {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--border);
}
.proof-caption {
  font-size: 12px;
  color: var(--muted);
  margin-top: 10px;
}

/* ---- Two lanes ---- */
.lanes-section {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px 60px;
}
.lanes-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 640px) { .lanes-grid { grid-template-columns: 1fr; } }
.lane-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
}
.lane-icon {
  font-size: 22px;
  margin-bottom: 10px;
}
.lane-title {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}
.lane-desc {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

/* ---- Footer ---- */
.footer {
  border-top: 1px solid var(--border);
  padding: 28px 24px;
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-links {
  display: flex;
  gap: 20px;
  font-size: 13px;
}
.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--text); text-decoration: none; }
.footer-note {
  font-size: 12px;
  color: var(--muted);
}

/* ---- Divider ---- */
.section-divider {
  max-width: 820px;
  margin: 0 auto 48px;
  padding: 0 24px;
  border: none;
  border-top: 1px solid var(--border);
}

/* ---- Content pages (methodology, api, about) ---- */
.page-container {
  max-width: 760px;
  margin: 0 auto;
  padding: 56px 24px 80px;
}
.page-title {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}
.page-subtitle {
  font-size: 16px;
  color: var(--muted);
  margin-bottom: 40px;
}
.footer-brand {
  font-weight: 700;
  font-size: 14px;
  color: var(--text);
}

/* ---- Prose (shared between article and page bodies) ---- */
.prose {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
}
.prose h1, .prose h2, .prose h3, .prose h4 {
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 2em 0 0.6em;
  line-height: 1.25;
}
.prose h1 { font-size: 26px; margin-top: 0; }
.prose h2 { font-size: 20px; color: var(--text); border-bottom: 1px solid var(--border); padding-bottom: 6px; }
.prose h3 { font-size: 17px; color: var(--text); }
.prose p { margin: 0 0 1.2em; }
.prose ul, .prose ol { margin: 0 0 1.2em 1.4em; }
.prose li { margin-bottom: 0.3em; }
.prose strong { font-weight: 700; color: var(--text); }
.prose em { color: var(--muted); font-style: italic; }
.prose hr { border: none; border-top: 1px solid var(--border); margin: 2.5em 0; }
.prose img {
  width: 100%;
  border-radius: 8px;
  border: 1px solid var(--border);
  margin: 1.5em 0;
  display: block;
}
.prose code {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 13px;
}
.prose pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
  overflow-x: auto;
  margin: 0 0 1.2em;
}
.prose pre code { background: none; border: none; padding: 0; }
.prose blockquote {
  border-left: 3px solid var(--blue);
  margin: 1.2em 0;
  padding: 8px 16px;
  color: var(--muted);
  font-style: italic;
}
.prose a { color: var(--blue); }
.prose a:hover { text-decoration: underline; }
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 1.4em;
  font-size: 14px;
}
.prose thead {
  border-bottom: 2px solid var(--border);
}
.prose th {
  text-align: left;
  padding: 8px 12px;
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}
.prose td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  color: var(--text);
}
.prose tr:last-child td { border-bottom: none; }
.prose tbody tr:hover { background: var(--surface); }

/* ---- Article page ---- */
.article-container {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}
.article-header {
  margin-bottom: 40px;
}
.article-meta-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.tag {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--blue);
  background: color-mix(in srgb, var(--blue) 12%, var(--surface));
  border-radius: 4px;
  padding: 3px 8px;
}
.article-date {
  font-size: 13px;
  color: var(--muted);
}
.article-title {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 12px;
}
.article-summary {
  font-size: 16px;
  color: var(--muted);
  margin-bottom: 12px;
  line-height: 1.6;
}
.article-substack-link {
  font-size: 13px;
  color: var(--muted);
}
.article-footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ---- Articles index ---- */
.articles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.article-card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  color: var(--text);
  transition: border-color 0.15s;
}
.article-card:hover {
  border-color: var(--blue);
  text-decoration: none;
}
.article-card-img img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}
.article-card-body {
  padding: 20px 24px 24px;
}
.article-card-title {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 10px 0 8px;
  line-height: 1.3;
}
.article-card-summary {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
  margin: 0;
}
.muted { color: var(--muted); }
@media (min-width: 640px) {
  .articles-grid { grid-template-columns: repeat(2, 1fr); }
}