/* NEXUS-UI-ADOPT-003 — offering pages (Intelligence, Academy, Business).
 * Design language captured from the adopted mockup (.artifacts/UI-ADOPT/conversion-spec.md).
 * Brand guard (tests/ui/test_brand_landing.py): only the v11 core hexes —
 * Ink Blue #193962, Soft Off-White #F7F8F5, Vivid Teal #4EE2D0 — plus neutrals.
 * The mockup's deeper hero band (#0B192F) is NOT adopted pending the 006 owner call;
 * dark surfaces use Ink Blue.
 */
/* Tokens come from the shared public layer (landing/tokens.css), which every
 * offering page links before this file. The --nx-* names are kept as aliases so
 * the rules below read unchanged; their VALUES are now canon's, not a second
 * private set. Two of them moved:
 *   --nx-muted  #5b6672 -> canon --bq-text-muted #5f6e85
 *               (both pass AA on the off-white surface: 5.49:1 -> 4.86:1)
 *   --nx-line   #e2e6ea -> canon --bq-border #e2e8f0
 * Canon governs neutrals (DESIGN_SYSTEM.md v1.1.0 §Neutral Colors); the
 * offering pages were carrying near-miss values that would have drifted.
 */
:root {
    --nx-ink: var(--bq-brand-ink-blue);
    --nx-offwhite: var(--bq-brand-soft-off-white);
    --nx-teal: var(--bq-brand-vivid-teal);
    --nx-ivory: var(--bq-brand-soft-off-white);
    --nx-muted: var(--bq-text-muted);
    --nx-line: var(--bq-border);
    --nx-container: var(--bq-container-max);
}

/* ── Section bands & rhythm ─────────────────────────────────────────────── */
.nx-offering main { font-family: Arial, "Helvetica Neue", Helvetica, sans-serif; }
.nx-band { padding: 80px 0; }
.nx-band-dark { background: var(--nx-ink); color: var(--nx-ivory); }
.nx-band-light { background: var(--nx-offwhite); color: var(--nx-ink); }
.nx-band-white { background: var(--bq-surface); color: var(--nx-ink); border-top: 1px solid var(--nx-line); border-bottom: 1px solid var(--nx-line); }
.nx-container { max-width: var(--nx-container); margin: 0 auto; padding-left: 20px; padding-right: 20px; }

/* ── Typography scale (mockup fidelity) ─────────────────────────────────── */
.nx-eyebrow { font-size: 13px; letter-spacing: .06em; text-transform: uppercase; font-weight: 700; color: var(--nx-teal); margin: 0 0 18px; }
.nx-band-light .nx-eyebrow, .nx-band-white .nx-eyebrow { color: var(--nx-ink); }
.nx-h1 { font-size: clamp(40px, 6vw, var(--bq-display-h1)); font-weight: 400; line-height: 1.02; letter-spacing: -0.03em; margin: 0 0 24px; }
.nx-h2 { font-size: clamp(30px, 4vw, var(--bq-display-h2)); font-weight: 400; line-height: 1.05; letter-spacing: -0.02em; margin: 0 0 20px; }
.nx-h3 { font-size: 20px; font-weight: 700; letter-spacing: -0.01em; margin: 0 0 10px; }
.nx-lede { font-size: 18px; line-height: 1.65; max-width: 62ch; margin: 0 0 28px; }
.nx-body-muted { color: var(--nx-muted); }

/* ── Hero ───────────────────────────────────────────────────────────────── */
.nx-hero { padding: 150px 0 90px; }
.nx-hero-figure img, .nx-hero-figure svg { width: 100%; max-width: 460px; height: auto; display: block; margin: 0 auto; }
.nx-statrow { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; background: var(--bq-on-dark-fill); border: 1px solid var(--bq-on-dark-fill); margin-top: 56px; }
.nx-stat { background: transparent; padding: 18px 20px; }
.nx-stat .nx-stat-label { font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--nx-teal); margin: 0 0 6px; }
.nx-stat .nx-stat-value { font-size: 26px; margin: 0; font-weight: 400; }
@media (max-width: 860px) { .nx-statrow { grid-template-columns: repeat(2, 1fr); } }

/* ── Cards ──────────────────────────────────────────────────────────────── */
.nx-card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; }
.nx-card { background: var(--bq-surface); color: var(--nx-ink); border: 1px solid var(--nx-line); border-radius: 14px; padding: 26px; }
.nx-band-dark .nx-card { background: var(--bq-on-dark-fill-faint); color: var(--nx-ivory); border-color: var(--bq-on-dark-border-faint); }
.nx-card .nx-card-label { font-size: 12px; letter-spacing: .07em; text-transform: uppercase; font-weight: 700; color: var(--nx-teal); margin: 0 0 10px; }
.nx-band-light .nx-card .nx-card-label, .nx-band-white .nx-card .nx-card-label { color: var(--nx-ink); }
.nx-card ul { margin: 14px 0 0; padding-left: 18px; }
.nx-chip { display: inline-block; font-size: 11px; letter-spacing: .08em; text-transform: uppercase; font-weight: 700; color: var(--nx-teal); border: 1px solid currentColor; border-radius: 999px; padding: 3px 10px; }

/* ── Hedge / demo caption language ──────────────────────────────────────── */
.nx-hedge { font-size: 12.5px; line-height: 1.55; color: var(--nx-muted); border-left: 3px solid var(--nx-teal); padding: 8px 0 8px 14px; margin: 22px 0 0; }
.nx-band-dark .nx-hedge { color: var(--bq-on-dark-text-muted); }
.nx-hedge-uppercase { text-transform: uppercase; letter-spacing: .04em; font-size: 11.5px; }
.nx-proto-note { text-align: center; font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--nx-muted); padding: 14px 0 22px; background: var(--nx-offwhite); }

/* ── Demo panel (intelligence) ──────────────────────────────────────────── */
.nx-demo { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 40px; }
@media (max-width: 900px) { .nx-demo { grid-template-columns: 1fr; } }
.nx-demo-panel { background: var(--bq-surface); color: var(--nx-ink); border: 1px solid var(--nx-line); border-radius: 14px; padding: 22px 24px; }
.nx-demo-panel h4 { font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--nx-muted); margin: 0 0 14px; }
.nx-demo-panel ol { margin: 0; padding-left: 0; list-style: none; }
.nx-demo-panel li { padding: 9px 0; border-bottom: 1px dashed var(--nx-line); font-size: 14px; line-height: 1.5; }
.nx-demo-panel li:last-child { border-bottom: 0; }
.nx-demo-metric { display: flex; gap: 12px; align-items: baseline; }
.nx-demo-metric b { font-size: 18px; color: var(--nx-ink); white-space: nowrap; }

/* ── Accordions (details/summary) ───────────────────────────────────────── */
details.nx-acc { border: 1px solid var(--nx-line); border-radius: 12px; background: var(--bq-surface); margin: 0 0 12px; }
.nx-band-dark details.nx-acc { background: var(--bq-on-dark-fill-faint); border-color: var(--bq-on-dark-border-faint); }
details.nx-acc > summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 16px 20px; font-weight: 700; }
details.nx-acc > summary::-webkit-details-marker { display: none; }
details.nx-acc > summary::after { content: "+"; font-size: 20px; color: var(--nx-teal); }
details.nx-acc[open] > summary::after { content: "\2212"; }
details.nx-acc .nx-acc-body { padding: 0 20px 18px; font-size: 15px; line-height: 1.6; }

/* ── Curriculum tabs (academy) ──────────────────────────────────────────── */
.nx-tabs { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin-bottom: 40px; }
.nx-tabcard { text-align: left; background: var(--bq-surface); color: var(--nx-ink); border: 1px solid var(--nx-line); border-radius: 14px; padding: 20px; cursor: pointer; font: inherit; }
.nx-tabcard[aria-selected="true"] { border-color: var(--nx-teal); box-shadow: 0 0 0 2px var(--nx-teal); }
.nx-tabcard .nx-tab-num { font-size: 12px; color: var(--nx-muted); letter-spacing: .1em; }
.nx-tabcard h3 { margin: 6px 0 8px; font-size: 18px; }
.nx-tabcard p { margin: 0 0 10px; font-size: 14px; color: var(--nx-muted); }
.nx-tabcard .nx-audience { font-size: 11px; letter-spacing: .06em; text-transform: uppercase; color: var(--nx-muted); }
.nx-panel[hidden] { display: none; }

/* ── Course cards ───────────────────────────────────────────────────────── */
.nx-course { background: var(--bq-on-dark-fill-faint); border: 1px solid var(--bq-on-dark-border-faint); border-radius: 14px; padding: 22px; color: var(--nx-ivory); }
.nx-course .nx-course-code { font-size: 11px; letter-spacing: .12em; color: var(--nx-teal); margin: 0 0 8px; }
.nx-course h3 { font-size: 18px; margin: 0 0 10px; }
.nx-course p { font-size: 14px; line-height: 1.6; margin: 0 0 12px; }
.nx-course .nx-course-status { font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--bq-on-dark-text-faint); border-top: 1px dashed var(--bq-on-dark-border); padding-top: 10px; margin: 0; }

/* ── Sequence / stage list ──────────────────────────────────────────────── */
.nx-stages { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 20px; counter-reset: stage; }
.nx-stage { border-top: 2px solid var(--nx-teal); padding-top: 16px; }
.nx-stage .nx-stage-num { font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--nx-muted); margin: 0 0 6px; }
.nx-band-dark .nx-stage .nx-stage-num { color: var(--nx-teal); }
.nx-stage h3 { font-size: 19px; margin: 0 0 8px; }
.nx-stage p { font-size: 14.5px; line-height: 1.6; margin: 0; }

/* ── Trust chips row ────────────────────────────────────────────────────── */
.nx-trustrow { display: flex; gap: 22px; flex-wrap: wrap; margin: 20px 0 26px; font-size: 14px; }
.nx-trustrow span::before { content: "\2713"; color: var(--nx-teal); margin-right: 8px; font-weight: 700; }