/* ────────────────────────────────────────────────────────────
   n1lab marketing — shared chrome.
   Loaded after colors_and_type.css on every page except index.html
   (which inlines its own copy of these styles).
   Every page is dark-mode only on the marketing site.
─────────────────────────────────────────────────────────────── */

html, body { background: var(--bg-primary); }
body {
  font: var(--text-body-lg);
  color: var(--text-primary);
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Page rails */
.rail { max-width: 1080px; margin: 0 auto; padding: 0 32px; }
.rail--wide { max-width: 1240px; }
.rail--narrow { max-width: 760px; }

/* Hairline rules */
.hr { border: 0; border-top: 1px solid var(--border-subtle); margin: 0; }
.hr--soft { border-top-color: #1a2127; }

/* Section meta labels */
.meta {
  font: 500 11px/1 var(--font-sans);
  color: var(--text-tertiary);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.meta--data {
  font: 500 11px/1 var(--font-mono);
  color: var(--text-tertiary);
  letter-spacing: 0.06em;
}
.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ─── Nav ─────────────────────────────────────────────────── */
nav.top {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11,13,15,0.78);
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--border-subtle);
}
nav.top .row {
  display: flex; align-items: center; justify-content: space-between;
  height: 56px;
}
nav.top a {
  color: var(--text-secondary);
  text-decoration: none;
  font: 500 13px/1 var(--font-sans);
  letter-spacing: -0.005em;
}
nav.top a:hover { color: var(--text-primary); }
nav.top a.active { color: var(--text-primary); }
nav.top .links { display: flex; gap: 28px; align-items: center; }
nav.top .links .cta {
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  height: 32px; padding: 0 14px;
  border-radius: 8px;
  display: inline-flex; align-items: center; gap: 6px;
}
nav.top .links .cta:hover { border-color: var(--border-strong); }

/* Wordmark */
.wordmark {
  display: inline-flex; flex-direction: column; align-items: flex-start; gap: 4px;
  line-height: 1;
  text-decoration: none;
}
.wordmark .name {
  font: 700 18px/1 var(--font-sans);
  letter-spacing: -0.02em;
  color: var(--text-primary);
}
.wordmark .rule {
  width: 38px; height: 1.5px;
  background: var(--accent-primary);
  position: relative;
}
.wordmark .rule::after {
  content: ""; position: absolute;
  left: 11px; top: -2px; width: 1.5px; height: 5.5px;
  background: var(--accent-primary);
}

/* ─── Buttons ─────────────────────────────────────────────── */
.btn-primary {
  height: 44px; padding: 0 22px;
  border-radius: 14px;
  background: var(--text-primary);
  color: var(--bg-primary);
  border: 1px solid var(--text-primary);
  font: 600 15px/1 var(--font-sans);
  letter-spacing: -0.005em;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex; align-items: center; gap: 8px;
  transition: background 120ms var(--ease-standard);
}
.btn-primary:hover { background: #e5e8ed; border-color: #e5e8ed; }
.btn-ghost {
  height: 44px; padding: 0 18px;
  border-radius: 14px;
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  font: 500 15px/1 var(--font-sans);
  cursor: pointer;
  display: inline-flex; align-items: center; gap: 8px;
  text-decoration: none;
}
.btn-ghost:hover { border-color: var(--border-strong); }

/* ─── Page header — used by every subpage ─────────────────── */
.page-head {
  padding: 96px 0 64px;
  border-bottom: 1px solid var(--border-subtle);
}
.page-head .row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 64px;
  align-items: end;
}
.page-head h1 {
  font: 700 clamp(40px, 4.4vw, 56px)/1.05 var(--font-sans);
  letter-spacing: -0.025em;
  margin: 0;
  max-width: 760px;
  text-wrap: pretty;
}
.page-head .sub {
  margin-top: 20px;
  max-width: 600px;
  font: 400 17px/1.55 var(--font-sans);
  color: var(--text-secondary);
}

/* Section labels (shared with on-page sections) */
.section-head {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 64px;
  align-items: start;
  margin-bottom: 48px;
}
.section-head h2 {
  font: 700 32px/1.15 var(--font-sans);
  letter-spacing: -0.02em; margin: 0;
  max-width: 640px;
}

/* ─── Footer ──────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border-subtle);
  padding: 64px 0 56px;
  margin-top: 96px;
}
footer .grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
}
footer h4 {
  font: 500 11px/1 var(--font-sans);
  color: var(--text-tertiary);
  letter-spacing: 0.12em; text-transform: uppercase;
  margin: 0 0 14px;
}
footer ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
footer a {
  color: var(--text-secondary);
  text-decoration: none;
  font: 400 14px/1.4 var(--font-sans);
}
footer a:hover { color: var(--text-primary); }
footer .bottom {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 48px; padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-tertiary);
  font: 400 12px/1 var(--font-mono);
  letter-spacing: 0.04em;
}
footer .colophon { font-variant-numeric: tabular-nums; }
footer .foot-mark {
  margin-bottom: 16px;
}
footer .foot-blurb {
  font: 400 13px/1.55 var(--font-sans);
  color: var(--text-tertiary);
  margin: 16px 0 0;
  max-width: 280px;
}

/* Inline links inside prose */
.prose a {
  color: var(--accent-primary);
  text-decoration: none;
  border-bottom: 1px solid rgba(108,141,255,0.3);
}
.prose a:hover { border-bottom-color: var(--accent-primary); }

/* Responsive */
@media (max-width: 880px) {
  .page-head .row,
  .section-head {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .page-head { padding: 64px 0 40px; }
  footer .grid { grid-template-columns: 1fr 1fr; }
  footer .bottom { flex-direction: column; gap: 8px; align-items: flex-start; }
}
@media (max-width: 520px) {
  .rail { padding: 0 20px; }
  footer .grid { grid-template-columns: 1fr; gap: 32px; }
}