/* Cairn Labs — product site styles (dark) */
:root {
  --bg: #14181d;
  --bg-soft: #1a2027;
  --card: #1d242c;
  --line: #2c353f;
  --ink: #e8ecef;
  --muted: #9aa7b2;
  --dim: #6b7884;
  --accent: #2dd4bf;
  --accent-dark: #14b8a6;
  --accent-ink: #0b3d38;
  --amber: #fbbf24;
  --red: #f87171;
  --green: #4ade80;
  --radius: 10px;
  --max: 1080px;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  font-size: 16.5px;
}

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ---------- Header ---------- */
header {
  border-bottom: 1px solid var(--line);
  background: rgba(20,24,29,0.92);
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(8px);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px; max-width: var(--max); margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand-name { font-weight: 700; font-size: 1.05rem; letter-spacing: -0.01em; }
.brand-name span { color: var(--accent); }
.brand .labs-tag {
  font-family: var(--mono); font-size: 0.7rem; color: var(--accent);
  border: 1px solid var(--accent-dark); border-radius: 4px; padding: 1px 6px; margin-left: 2px;
}

nav ul { display: flex; gap: 24px; list-style: none; align-items: center; }
nav a { text-decoration: none; color: var(--muted); font-size: 0.95rem; font-weight: 500; }
nav a:hover, nav a.active { color: var(--accent); }
nav a.btn { color: var(--accent-ink); }
.menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 6px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; background: var(--accent); color: var(--accent-ink);
  padding: 11px 22px; border-radius: 8px; text-decoration: none;
  font-weight: 700; font-size: 0.95rem; border: 1px solid var(--accent);
  transition: background 0.15s ease;
}
.btn:hover { background: var(--accent-dark); border-color: var(--accent-dark); }
.btn.ghost { background: transparent; color: var(--accent); }
.btn.ghost:hover { background: rgba(45,212,191,0.08); }
.btn.big { padding: 14px 28px; font-size: 1rem; }

/* ---------- Hero ---------- */
.hero { padding: 80px 0 64px; }
.hero .kicker {
  font-family: var(--mono); color: var(--accent); font-size: 0.82rem;
  letter-spacing: 0.04em; margin-bottom: 16px;
}
.hero h1 {
  font-size: clamp(1.9rem, 4.5vw, 2.9rem); line-height: 1.15;
  letter-spacing: -0.02em; max-width: 800px; margin-bottom: 20px;
}
.hero p.lede { font-size: 1.15rem; color: var(--muted); max-width: 660px; margin-bottom: 30px; }
.hero .actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero .note { margin-top: 16px; font-size: 0.88rem; color: var(--dim); font-family: var(--mono); }

/* ---------- Sections ---------- */
section { padding: 56px 0; }
section.soft { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 700px; margin-bottom: 36px; }
.section-head h2 { font-size: 1.7rem; letter-spacing: -0.01em; margin-bottom: 10px; }
.section-head p { color: var(--muted); }

.grid { display: grid; gap: 20px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px;
}
.card h3 { font-size: 1.12rem; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 0.95rem; }
.card .mono { font-family: var(--mono); font-size: 0.8rem; color: var(--accent); margin-bottom: 12px; }

/* stat blocks */
.stat { text-align: left; }
.stat .v { font-size: 2rem; font-weight: 750; letter-spacing: -0.02em; color: var(--accent); font-variant-numeric: tabular-nums; }
.stat .l { color: var(--muted); font-size: 0.88rem; margin-top: 2px; }

/* pipeline steps */
.step-num {
  width: 30px; height: 30px; border-radius: 6px;
  background: rgba(45,212,191,0.12); color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; margin-bottom: 12px; font-family: var(--mono); font-size: 0.9rem;
}

/* ---------- Pricing ---------- */
.price-card { display: flex; flex-direction: column; }
.price-card .tier { font-family: var(--mono); font-size: 0.78rem; color: var(--accent); margin-bottom: 8px; letter-spacing: 0.04em; }
.price-card .price { font-size: 1.8rem; font-weight: 750; letter-spacing: -0.02em; }
.price-card .per { color: var(--dim); font-size: 0.88rem; margin-bottom: 16px; }
.price-card ul { list-style: none; margin: 0 0 22px; }
.price-card li { padding: 5px 0 5px 24px; position: relative; color: var(--muted); font-size: 0.93rem; }
.price-card li::before {
  content: "→"; position: absolute; left: 0; color: var(--accent); font-family: var(--mono);
}
.price-card .btn { margin-top: auto; text-align: center; }
.price-card.featured { border-color: var(--accent-dark); }

/* ---------- Code / report styling ---------- */
pre.code {
  background: #10141a; border: 1px solid var(--line); border-radius: 8px;
  padding: 18px 20px; font-family: var(--mono); font-size: 0.84rem; line-height: 1.6;
  overflow-x: auto; color: #c9d4dd; margin: 18px 0;
}
pre.code .c { color: var(--dim); }
pre.code .k { color: var(--accent); }
pre.code .s { color: var(--amber); }

.report-excerpt {
  background: #10141a; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; margin: 20px 0;
}
.report-excerpt h4 { font-family: var(--mono); font-size: 0.85rem; color: var(--muted); margin-bottom: 16px; font-weight: 500; }
.tier-row { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.tier-row .tl { font-family: var(--mono); font-size: 0.78rem; width: 150px; flex-shrink: 0; color: var(--muted); }
.tier-row .bar-track { flex: 1; height: 14px; background: #1a2027; border-radius: 7px; overflow: hidden; }
.tier-row .bar-fill { height: 100%; border-radius: 7px; }
.tier-row .pc { font-family: var(--mono); font-size: 0.8rem; width: 56px; text-align: right; color: var(--ink); font-variant-numeric: tabular-nums; }

/* ---------- Callouts ---------- */
.callout {
  border-left: 3px solid var(--accent); background: rgba(45,212,191,0.06);
  padding: 16px 20px; border-radius: 0 8px 8px 0; margin: 24px 0;
  color: var(--muted); font-size: 0.95rem;
}
.callout strong { color: var(--ink); }
.callout.amber { border-color: var(--amber); background: rgba(251,191,36,0.06); }

/* ---------- CTA band ---------- */
.cta-band {
  background: linear-gradient(135deg, rgba(45,212,191,0.12), rgba(45,212,191,0.03));
  border: 1px solid var(--accent-dark);
  border-radius: 14px; padding: 44px; display: flex; align-items: center;
  justify-content: space-between; gap: 30px; flex-wrap: wrap;
}
.cta-band h2 { font-size: 1.5rem; letter-spacing: -0.01em; margin-bottom: 6px; }
.cta-band p { color: var(--muted); max-width: 520px; }

/* ---------- Prose ---------- */
.prose { max-width: 720px; }
.prose h2 { font-size: 1.45rem; margin: 36px 0 12px; letter-spacing: -0.01em; }
.prose h3 { font-size: 1.12rem; margin: 26px 0 8px; }
.prose p { margin-bottom: 14px; color: var(--muted); }
.prose ul { margin: 0 0 14px 22px; color: var(--muted); }
.prose li { margin-bottom: 6px; }
.prose a { color: var(--accent); }

/* ---------- Footer ---------- */
footer { border-top: 1px solid var(--line); padding: 36px 0; margin-top: 32px; }
.foot { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; align-items: center; }
.foot .small { color: var(--dim); font-size: 0.86rem; }
.foot a { color: var(--muted); }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; }
  nav ul {
    display: none; position: absolute; top: 60px; right: 16px;
    background: var(--card); border: 1px solid var(--line); border-radius: 10px;
    flex-direction: column; padding: 16px 22px; gap: 14px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  }
  nav ul.open { display: flex; }
  .menu-toggle { display: block; }
  .hero { padding: 52px 0 44px; }
  .cta-band { padding: 30px; }
  .tier-row .tl { width: 100px; }
}