:root {
  --nna-ink: #102235;
  --nna-navy: #14304a;
  --nna-deep: #0a1d2d;
  --nna-paper: #f6f3ec;
  --nna-white: #ffffff;
  --nna-muted: #526779;
  --nna-line: #cbd4d9;
  --nna-green: #0d6b61;
  --nna-green-dark: #084b45;
  --nna-gold: #c99b49;
  --nna-warn: #fff5dc;
  --nna-radius: 18px;
  --nna-shadow: 0 22px 60px rgba(7, 29, 45, .12);
}

.nna-credential-page-shell main { padding: 0; }
.nna-investigation { overflow: hidden; background: var(--nna-white); color: var(--nna-ink); font-size: 1.05rem; line-height: 1.72; }
.nna-investigation *, .nna-investigation *::before, .nna-investigation *::after { box-sizing: border-box; }
.nna-investigation a { color: var(--nna-green-dark); text-decoration-thickness: 1px; text-underline-offset: .2em; }
.nna-investigation h1, .nna-investigation h2, .nna-investigation h3 { margin-top: 0; color: var(--nna-deep); font-family: Georgia, "Times New Roman", serif; line-height: 1.08; text-wrap: balance; }
.nna-investigation h2 { font-size: clamp(2rem, 4vw, 3.45rem); letter-spacing: -.035em; }
.nna-investigation h3 { font-size: 1.3rem; }
.nna-investigation p { max-width: 72ch; }
.nna-shell { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.nna-kicker, .nna-label, .nna-evidence-tag, .nna-state { margin: 0 0 14px; color: var(--nna-green); font: 800 .76rem/1.25 system-ui, sans-serif; letter-spacing: .12em; text-transform: uppercase; }

.nna-hero { position: relative; padding: 34px 0 88px; background: linear-gradient(135deg, var(--nna-deep), var(--nna-navy) 66%, #1e4b5a); color: #fff; }
.nna-hero::after { position: absolute; right: -12%; bottom: -45%; width: 52%; aspect-ratio: 1; border: 1px solid rgba(255,255,255,.14); border-radius: 50%; content: ""; }
.nna-breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 56px; color: #c7d6de; font: 700 .78rem/1.4 system-ui, sans-serif; letter-spacing: .04em; }
.nna-breadcrumbs a { color: inherit; }
.nna-hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(280px, .65fr); gap: clamp(38px, 7vw, 92px); align-items: end; }
.nna-hero h1, .nna-explainer-hero h1 { max-width: 900px; margin-bottom: 26px; color: #fff; font-size: clamp(3rem, 7.2vw, 6.8rem); letter-spacing: -.055em; }
.nna-hero h1 em, .nna-explainer-hero h1 em { color: #9cddd2; font-style: normal; }
.nna-hero .nna-kicker, .nna-explainer-hero .nna-kicker { color: #9cddd2; }
.nna-deck { margin: 0; color: #e3edf1; font-size: clamp(1.08rem, 2vw, 1.34rem); line-height: 1.55; }
.nna-hero-actions, .nna-share-actions, .nna-footer-actions, .nna-source-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.nna-hero-actions { margin-top: 32px; }
.nna-button { display: inline-flex; min-height: 48px; padding: 12px 20px; border: 1px solid transparent; border-radius: 999px; align-items: center; justify-content: center; font: 800 .9rem/1 system-ui, sans-serif; text-decoration: none !important; cursor: pointer; transition: transform .18s ease, background .18s ease, border-color .18s ease; }
.nna-button:hover { transform: translateY(-2px); }
.nna-button:focus-visible { outline: 3px solid var(--nna-gold); outline-offset: 3px; }
.nna-button-primary { background: #9cddd2; color: #082e2b !important; }
.nna-button-secondary { border-color: rgba(255,255,255,.55); background: transparent; color: #fff !important; }
.nna-byline { margin-top: 25px; color: #b9cbd4; font-size: .9rem; }
.nna-byline a { color: #fff; }
.nna-key-record { padding: 30px; border-top: 4px solid var(--nna-gold); background: var(--nna-paper); color: var(--nna-ink); box-shadow: var(--nna-shadow); }
.nna-key-record blockquote { margin: 0 0 20px; font: 700 1.22rem/1.48 Georgia, serif; }
.nna-key-record .nna-source-note { margin-bottom: 0; color: var(--nna-muted); font-size: .82rem; }

.nna-opening, .nna-evidence-section, .nna-duty-section, .nna-api-section, .nna-pattern-section, .nna-sources-section { padding: clamp(70px, 10vw, 128px) 0; }
.nna-reading-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(260px, .6fr); gap: clamp(38px, 8vw, 110px); align-items: start; }
.nna-prose > p:first-of-type:not(.nna-kicker) { font-size: 1.18rem; }
.nna-definition, .nna-question-list, .nna-technical-card { padding: 28px; border: 1px solid var(--nna-line); border-radius: var(--nna-radius); background: #fff; box-shadow: 0 16px 42px rgba(13, 40, 58, .08); }
.nna-thesis { max-width: none !important; padding: 24px 28px; border-left: 5px solid var(--nna-green); background: #eaf5f2; color: var(--nna-green-dark); font: 700 clamp(1.15rem, 2vw, 1.4rem)/1.5 Georgia, serif; }

.nna-flow-section { padding: clamp(70px, 9vw, 116px) 0; background: var(--nna-paper); }
.nna-section-heading { max-width: 820px; margin-bottom: 48px; }
.nna-section-heading > p:last-child { color: var(--nna-muted); font-size: 1.12rem; }
.nna-flow { display: grid; grid-template-columns: repeat(6, 1fr); gap: 2px; margin: 0; padding: 0; list-style: none; }
.nna-flow li { position: relative; min-height: 230px; padding: 24px 20px; background: #fff; }
.nna-flow li::after { position: absolute; top: 50%; right: -10px; z-index: 2; width: 18px; height: 18px; border-top: 2px solid var(--nna-green); border-right: 2px solid var(--nna-green); background: #fff; content: ""; transform: rotate(45deg); }
.nna-flow li:last-child::after { display: none; }
.nna-flow-number { display: block; margin-bottom: 40px; color: var(--nna-green); font: 900 1.6rem/1 system-ui, sans-serif; }
.nna-flow strong, .nna-flow small { display: block; }
.nna-flow small { margin-top: 12px; color: var(--nna-muted); font-size: .88rem; line-height: 1.55; }
.nna-flow-decision { background: var(--nna-green-dark) !important; color: #fff; }
.nna-flow-decision .nna-flow-number, .nna-flow-decision small { color: #bfe8e1; }
.nna-flow-boundary, .nna-boundary-note, .nna-callout { margin-top: 28px; padding: 20px 24px; border: 1px solid #e2c982; background: var(--nna-warn); }

.nna-evidence-pair, .nna-contrast, .nna-state-records, .nna-proof-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.nna-evidence-pair article, .nna-state-records article, .nna-proof-grid article { padding: 30px; border: 1px solid var(--nna-line); background: #fff; }
.nna-funnel-section, .nna-fcra-section, .nna-subscriber-section, .nna-history-section, .nna-proof-section { padding: clamp(70px, 10vw, 128px) 0; background: #f0f4f5; }
.nna-funnel { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--nna-line); border-bottom: 1px solid var(--nna-line); }
.nna-funnel article { padding: 30px 24px; border-right: 1px solid var(--nna-line); background: #fff; }
.nna-funnel article:last-child { border-right: 0; }
.nna-funnel article > span { color: var(--nna-green); font: 800 .72rem system-ui, sans-serif; letter-spacing: .11em; text-transform: uppercase; }
.nna-funnel-summary { display: flex; gap: 34px; margin-top: 28px; color: var(--nna-muted); }
.nna-loop-section { padding: clamp(70px, 10vw, 120px) 0; background: var(--nna-deep); color: #dce8ed; }
.nna-loop-section h2 { color: #fff; }
.nna-loop-grid { display: grid; grid-template-columns: .75fr 1.25fr; gap: 70px; align-items: center; }
.nna-loop { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 0; padding: 0; list-style: none; }
.nna-loop li { display: grid; min-height: 112px; padding: 18px; border: 1px solid #365264; place-items: center; text-align: center; }
.nna-loop-return { border-color: #72c7b9 !important; background: #123d3a; color: #bfe8e1; }
.nna-contrast article { padding: 32px; }
.nna-contrast article:first-child { background: var(--nna-deep); color: #fff; }
.nna-contrast article:first-child .nna-label { color: #9cddd2; }
.nna-contrast article:last-child { border: 1px solid var(--nna-line); }
.nna-contrast ul, .nna-proof-grid ul { padding-left: 1.2rem; }
.nna-contrast li, .nna-proof-grid li { margin-bottom: 10px; }
.nna-state-records { margin-top: 30px; }

.nna-question-list ol { margin: 0; padding-left: 1.2rem; }
.nna-question-list li { margin-bottom: 10px; }
.nna-actor-table-wrap { margin-top: 50px; overflow-x: auto; }
.nna-actor-table { width: 100%; min-width: 760px; border-collapse: collapse; background: #fff; font-size: .93rem; }
.nna-actor-table caption { padding: 18px; background: var(--nna-deep); color: #fff; font: 700 1.1rem Georgia, serif; text-align: left; }
.nna-actor-table th, .nna-actor-table td { padding: 18px; border-bottom: 1px solid var(--nna-line); text-align: left; vertical-align: top; }
.nna-actor-table thead th { color: var(--nna-green-dark); font: 800 .76rem system-ui, sans-serif; letter-spacing: .08em; text-transform: uppercase; }
.nna-subscriber-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin: 0 0 28px; padding: 0; border-top: 1px solid var(--nna-line); list-style: none; }
.nna-subscriber-list li { padding: 18px; border-right: 1px solid var(--nna-line); border-bottom: 1px solid var(--nna-line); background: #fff; font-weight: 700; }
.nna-source-row { margin-top: 18px; }
.nna-source-row a { font-weight: 700; }
.nna-technical-card dl, .nna-technical-card dd { margin: 0; }
.nna-technical-card div { padding: 15px 0; border-bottom: 1px solid var(--nna-line); }
.nna-technical-card div:last-child { border: 0; }
.nna-technical-card dt { color: var(--nna-muted); font: 800 .7rem system-ui, sans-serif; letter-spacing: .09em; text-transform: uppercase; }

.nna-timeline { position: relative; margin: 0; padding: 0; list-style: none; }
.nna-timeline::before { position: absolute; top: 0; bottom: 0; left: 77px; width: 1px; background: var(--nna-line); content: ""; }
.nna-timeline li { position: relative; display: grid; grid-template-columns: 120px 1fr; gap: 34px; padding: 0 0 42px; }
.nna-timeline time { position: relative; z-index: 1; width: fit-content; padding: 7px 10px; background: var(--nna-green-dark); color: #fff; font: 800 .78rem system-ui, sans-serif; }
.nna-timeline p { margin-bottom: 0; color: var(--nna-muted); }
.nna-source-index { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--nna-line); }
.nna-source-index article { padding: 22px 18px; border-right: 1px solid var(--nna-line); border-bottom: 1px solid var(--nna-line); }
.nna-source-index span { display: block; margin-bottom: 8px; color: var(--nna-muted); font: 800 .7rem system-ui, sans-serif; letter-spacing: .08em; text-transform: uppercase; }
.nna-article-footer { padding: 72px 0; background: var(--nna-green-dark); color: #dceeea; }
.nna-article-footer .nna-shell { display: grid; grid-template-columns: 1.25fr .75fr; gap: 60px; align-items: center; }
.nna-article-footer h2 { color: #fff; }

.nna-explainer-hero { padding: 34px 0 82px; background: var(--nna-deep); color: #fff; }
.nna-explainer-hero h1 { max-width: 1080px; font-size: clamp(2.8rem, 6.7vw, 6.2rem); }
.nna-share-actions { margin-top: 30px; }
.nna-copy-status { min-height: 1.4em; color: #bfe8e1; font: 700 .9rem system-ui, sans-serif; }
.nna-explainer-body { padding: 40px 0 70px; }
.nna-explainer-fact { display: grid; grid-template-columns: 100px 1fr; gap: 30px; padding: 42px 0; border-bottom: 1px solid var(--nna-line); }
.nna-explainer-fact > span { color: var(--nna-green); font: 900 clamp(2rem, 5vw, 4rem)/1 system-ui, sans-serif; }
.nna-explainer-fact h2 { margin-bottom: 12px; font-size: clamp(1.55rem, 3vw, 2.5rem); }
.nna-explainer-fact p { margin: 0; color: var(--nna-muted); }
.nna-explainer-quote { padding: 85px 0; background: var(--nna-paper); }
.nna-explainer-quote blockquote { margin: 0 0 22px; }
.nna-explainer-quote blockquote p { max-width: 1000px; margin: 0; color: var(--nna-deep); font: 700 clamp(2.3rem, 6vw, 5.4rem)/1.02 Georgia, serif; letter-spacing: -.045em; }
.nna-explainer-boundary { padding: 72px 0; background: var(--nna-green-dark); color: #dceeea; }
.nna-explainer-boundary .nna-shell { display: grid; grid-template-columns: 1.25fr .75fr; gap: 60px; align-items: center; }
.nna-explainer-boundary h2 { color: #fff; }

@media (max-width: 900px) {
  .nna-hero-grid, .nna-reading-grid, .nna-loop-grid, .nna-article-footer .nna-shell, .nna-explainer-boundary .nna-shell { grid-template-columns: 1fr; }
  .nna-flow { grid-template-columns: repeat(2, 1fr); }
  .nna-flow li::after { display: none; }
  .nna-funnel { grid-template-columns: repeat(2, 1fr); }
  .nna-subscriber-list { grid-template-columns: repeat(2, 1fr); }
  .nna-key-record { max-width: 620px; }
}

@media (max-width: 620px) {
  .nna-shell { width: min(100% - 28px, 1180px); }
  .nna-hero, .nna-explainer-hero { padding-bottom: 60px; }
  .nna-breadcrumbs { margin-bottom: 38px; }
  .nna-hero h1, .nna-explainer-hero h1 { font-size: clamp(2.65rem, 14vw, 4.2rem); }
  .nna-flow, .nna-funnel, .nna-evidence-pair, .nna-contrast, .nna-state-records, .nna-proof-grid, .nna-subscriber-list, .nna-source-index { grid-template-columns: 1fr; }
  .nna-flow li { min-height: 0; }
  .nna-flow-number { margin-bottom: 18px; }
  .nna-funnel article { border-right: 0; border-bottom: 1px solid var(--nna-line); }
  .nna-funnel-summary { flex-direction: column; gap: 4px; }
  .nna-loop { grid-template-columns: repeat(2, 1fr); }
  .nna-timeline::before { left: 0; }
  .nna-timeline li { grid-template-columns: 1fr; gap: 14px; padding-left: 22px; }
  .nna-explainer-fact { grid-template-columns: 1fr; gap: 14px; }
  .nna-button { width: 100%; }
  .nna-share-actions .nna-copy-status { width: 100%; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  .nna-button { transition: none; }
}

@media print {
  .nna-hero, .nna-explainer-hero, .nna-loop-section, .nna-article-footer, .nna-explainer-boundary { background: #fff !important; color: #000 !important; }
  .nna-investigation h1, .nna-investigation h2, .nna-investigation h3, .nna-hero h1, .nna-explainer-hero h1 { color: #000 !important; }
  .nna-button, .nna-share-actions { display: none !important; }
}