:root {
  --ink: #15213b;
  --muted: #54627a;
  --paper: #fbfcff;
  --panel: #ffffff;
  --line: #dce3ef;
  --navy: #0d2445;
  --blue: #1769e0;
  --cyan: #08a7c6;
  --lime: #b9e34b;
  --soft: #eef5ff;
  --radius: 18px;
  --shadow: 0 18px 50px rgba(19, 40, 78, .09);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.65 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
img, svg { display: block; max-width: 100%; }
a { color: #075bc7; text-underline-offset: .18em; }
a:hover { color: #003c8d; }
.skip-link { position: absolute; left: -9999px; top: .5rem; }
.skip-link:focus { left: .75rem; z-index: 1000; background: white; padding: .7rem 1rem; border-radius: 8px; }
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(251,252,255,.95); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
.nav-wrap { width: min(1180px, calc(100% - 2rem)); margin: auto; min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { color: var(--navy); font-weight: 800; text-decoration: none; letter-spacing: -.02em; }
.brand span { color: var(--blue); }
.nav-links { display: flex; align-items: center; gap: 1.2rem; list-style: none; margin: 0; padding: 0; }
.nav-links a { color: var(--ink); font-size: .9rem; font-weight: 650; text-decoration: none; }
.nav-links a[aria-current="page"] { color: var(--blue); }
.nav-toggle { display: none; border: 1px solid var(--line); background: white; color: var(--ink); border-radius: 10px; padding: .55rem .7rem; font: inherit; }
main { display: block; }
.hero { padding: clamp(4.5rem, 9vw, 8rem) 0 4rem; background: radial-gradient(circle at 85% 5%, rgba(8,167,198,.16), transparent 30%), linear-gradient(150deg, #fff 0%, #f2f7ff 70%); }
.wrap { width: min(1080px, calc(100% - 2rem)); margin-inline: auto; }
.wide { width: min(1180px, calc(100% - 2rem)); margin-inline: auto; }
.eyebrow { margin: 0 0 .7rem; color: #075bc7; font-size: .76rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
h1, h2, h3 { color: var(--navy); line-height: 1.15; letter-spacing: -.025em; }
h1 { max-width: 880px; margin: 0; font-size: clamp(2.5rem, 6vw, 5.15rem); }
h2 { margin-top: 0; font-size: clamp(1.75rem, 3.5vw, 2.65rem); }
h3 { font-size: 1.2rem; }
.lede { max-width: 760px; color: var(--muted); font-size: clamp(1.05rem, 2vw, 1.28rem); }
.actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.6rem; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: .7rem 1.1rem; border: 1px solid var(--blue); border-radius: 999px; background: var(--blue); color: white; font-weight: 750; text-decoration: none; }
.button.secondary { background: white; color: var(--blue); }
.section { padding: clamp(3rem, 7vw, 5.8rem) 0; }
.section.tint { background: var(--soft); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.grid.two { grid-template-columns: repeat(2, 1fr); }
.card { padding: 1.4rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); box-shadow: var(--shadow); }
.card > :first-child { margin-top: 0; }
.card > :last-child { margin-bottom: 0; }
.chain { display: grid; grid-template-columns: repeat(5, 1fr); gap: .6rem; margin: 2rem 0; padding: 0; list-style: none; counter-reset: chain; }
.chain li { min-height: 118px; padding: 1rem; border-radius: 14px; background: var(--navy); color: white; }
.chain strong { display: block; color: var(--lime); }
.figure { margin: 2rem 0 0; padding: 1.2rem; background: white; border: 1px solid var(--line); border-radius: var(--radius); }
.figure figcaption { margin-top: .8rem; color: var(--muted); font-size: .9rem; }
.notice { border-left: 4px solid var(--cyan); background: #ecfbfd; padding: 1rem 1.2rem; border-radius: 0 12px 12px 0; }
.review { color: var(--muted); font-size: .88rem; }
table { width: 100%; border-collapse: collapse; background: white; }
caption { text-align: left; padding: 0 0 1rem; color: var(--muted); }
th, td { padding: .85rem; border: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: #e9f2ff; color: var(--navy); }
.table-wrap { overflow-x: auto; border-radius: 12px; }
.filters { display: flex; flex-wrap: wrap; gap: .5rem; margin: 1.2rem 0; }
.filter-button, .layer-button { border: 1px solid #aec0d8; border-radius: 999px; background: white; color: var(--navy); padding: .55rem .9rem; font: inherit; font-weight: 700; cursor: pointer; }
.filter-button[aria-pressed="true"], .layer-button[aria-pressed="true"] { background: var(--navy); color: white; border-color: var(--navy); }
.control-card[hidden], .layer-panel[hidden] { display: none; }
.control-meta { color: var(--muted); font-size: .85rem; text-transform: uppercase; letter-spacing: .08em; }
.architecture-shell { display: grid; grid-template-columns: minmax(180px, .6fr) 2fr; gap: 1rem; }
.layer-controls { display: flex; flex-direction: column; gap: .6rem; }
.layer-button { border-radius: 12px; text-align: left; }
.layer-panel { min-height: 260px; }
.scorecard { display: grid; gap: 1rem; }
.score-item { border: 0; margin: 0; padding: 1rem; background: white; border-radius: 12px; }
.score-item legend { font-weight: 800; color: var(--navy); }
.choice-row { display: flex; flex-wrap: wrap; gap: 1rem; }
.result { min-height: 130px; border: 2px solid var(--cyan); border-radius: var(--radius); padding: 1.2rem; background: #ecfbfd; }
details { border-top: 1px solid var(--line); padding: 1rem 0; }
summary { cursor: pointer; font-weight: 750; color: var(--navy); }
.site-footer { padding: 2.5rem 0; background: var(--navy); color: #dce8f8; }
.site-footer a { color: white; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }
.footer-nav { display: flex; flex-wrap: wrap; gap: .8rem 1.1rem; }
.kicker { color: var(--muted); max-width: 720px; }
code { background: #eaf0f8; padding: .1em .3em; border-radius: 4px; }
@media (max-width: 820px) {
  .nav-toggle { display: inline-block; }
  .nav-links { display: none; position: absolute; inset: 68px 0 auto; padding: 1rem; background: white; border-bottom: 1px solid var(--line); flex-direction: column; align-items: stretch; }
  .nav-links.open { display: flex; }
  .grid, .grid.two, .chain, .footer-grid { grid-template-columns: 1fr; }
  .architecture-shell { grid-template-columns: 1fr; }
  .layer-controls { flex-direction: row; overflow-x: auto; }
  .layer-button { white-space: nowrap; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* Commercial landing components */
.container { width: min(1180px, calc(100% - 2rem)); margin-inline: auto; }
.nav { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.brand small { display: block; color: var(--muted); font-size: .65rem; letter-spacing: .08em; }
.nav-cta { padding: .6rem 1rem; border-radius: 999px; background: var(--blue); color: white !important; }
.menu-button { display: none; width: 44px; height: 44px; padding: .55rem; border: 1px solid var(--line); border-radius: 10px; background: white; }
.menu-button span:not(.sr-only) { display: block; height: 2px; margin: 5px 0; background: var(--navy); }
.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: clamp(2.5rem, 7vw, 6rem); }
.hero-copy h1 { max-width: 13ch; }
.hero-lead { max-width: 62ch; color: var(--muted); font-size: clamp(1.05rem, 2vw, 1.25rem); }
.hero-figure, .split figure, .wide-figure { margin: 0; padding: .9rem; border: 1px solid var(--line); border-radius: var(--radius); background: white; box-shadow: var(--shadow); }
.hero-figure figcaption, figure figcaption { margin-top: .7rem; color: var(--muted); font-size: .82rem; }
.boundary { margin: 1.4rem 0; padding: 1rem 1.15rem; border-left: 4px solid var(--cyan); border-radius: 0 12px 12px 0; background: rgba(255,255,255,.8); }
.boundary p { margin: .25rem 0 0; color: var(--muted); }
.button-row { display: flex; flex-wrap: wrap; gap: .8rem; }
.button-primary { background: var(--blue); color: white; }
.button-secondary { background: white; color: var(--blue); }
.button-light { background: white; color: var(--navy); }
.text-link { color: white; font-weight: 750; }
.quick-facts { padding: 3.2rem 0; background: var(--navy); color: white; }
.quick-facts h2 { color: white; }
.fact-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin: 2rem 0 0; background: #2e4566; }
.fact-grid div { padding: 1.25rem; background: var(--navy); }
.fact-grid dt { color: var(--lime); font-weight: 800; }
.fact-grid dd { margin: .35rem 0 0; color: #cfdbeb; font-size: .9rem; }
.topic-nav { border-bottom: 1px solid var(--line); background: white; }
.topic-scroll { display: flex; align-items: center; gap: .7rem; overflow-x: auto; padding-block: .8rem; }
.topic-scroll span, .topic-scroll a { flex: 0 0 auto; }
.topic-scroll a { padding: .35rem .7rem; border-radius: 999px; background: var(--soft); text-decoration: none; font-size: .85rem; font-weight: 700; }
.section-soft { background: var(--soft); }
.section-dark { background: var(--navy); color: #dce8f8; }
.section-dark h2, .section-dark h3 { color: white; }
.section-dark .section-label { color: var(--lime); }
.section-label { color: #075bc7; font-size: .76rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.section-intro { max-width: 72ch; margin-bottom: 2rem; color: var(--muted); font-size: 1.05rem; }
.card-grid { display: grid; gap: 1rem; }
.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }
.split { display: grid; grid-template-columns: .95fr 1.05fr; align-items: center; gap: clamp(2.5rem, 7vw, 6rem); }
.split-reverse { grid-template-columns: 1.05fr .95fr; }
.chain-list { display: grid; gap: .8rem; padding: 0; list-style: none; }
.chain-list li { display: grid; grid-template-columns: 10rem 1fr; gap: 1rem; padding-top: .8rem; border-top: 1px solid #365071; }
.chain-list strong { color: white; }
.chain-list span { color: #c4d2e3; }
.stack-list div { padding: .75rem 0; border-top: 1px solid var(--line); }
.stack-list dt { font-weight: 800; }
.stack-list dd { margin: .2rem 0 0; color: var(--muted); }
.wide-figure { max-width: 980px; margin: 2rem auto; }
.warning { margin-top: 2rem; padding: 1.3rem; border: 1px solid #d9e69a; border-radius: var(--radius); background: #fbffe9; }
.warning ul { columns: 2; }
.timeline { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; padding: 0; list-style: none; }
.timeline li { display: grid; grid-template-columns: 2.5rem 1fr; gap: .8rem; padding: 1.2rem; border: 1px solid #365071; border-radius: var(--radius); background: #143157; }
.timeline > li > span { color: var(--lime); font-weight: 900; }
.timeline p { margin: 0; }
.deliverable-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; border: 1px solid var(--line); background: var(--line); }
.deliverable-grid article { padding: 1.3rem; background: white; }
.proof-card a { font-weight: 800; }
.source-note { color: var(--muted); font-size: .85rem; }
.source-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(2.5rem, 7vw, 6rem); }
.source-list { margin: 0; padding: 0; list-style: none; }
.source-list li { border-top: 1px solid var(--line); }
.source-list a { display: block; padding: .75rem 0; font-weight: 700; }
.glossary-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin: 2rem 0 0; padding: 1px; background: #365071; }
.glossary-grid div { padding: 1.2rem; background: var(--navy); }
.glossary-grid dt { color: var(--lime); font-weight: 850; }
.glossary-grid dd { margin: .35rem 0 0; color: #c4d2e3; }
.faq-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: clamp(2.5rem, 7vw, 6rem); }
.faq-list details:last-child { border-bottom: 1px solid var(--line); }
.faq-list p { color: var(--muted); }
.cta-section { padding: 1.5rem 0 5rem; }
.cta-box { display: grid; grid-template-columns: 1.35fr .65fr; align-items: center; gap: 2rem; padding: clamp(2rem, 5vw, 4rem); border-radius: var(--radius); background: linear-gradient(135deg, var(--blue), var(--navy)); color: white; }
.cta-box h2 { color: white; }
.review-section { padding: 2.5rem 0; border-top: 1px solid var(--line); }
.review-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.review-grid dt { color: var(--muted); font-size: .72rem; font-weight: 800; text-transform: uppercase; }
.review-grid dd { margin: .3rem 0 0; }
.footer-grid { display: flex; justify-content: space-between; gap: 2rem; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 1rem; }

@media (max-width: 820px) {
  .menu-button { display: inline-flex; flex-direction: column; justify-content: center; }
  .hero-grid, .split, .split-reverse, .source-grid, .faq-layout, .cta-box { grid-template-columns: 1fr; }
  .fact-grid, .card-grid-3, .deliverable-grid, .timeline, .glossary-grid { grid-template-columns: repeat(2, 1fr); }
  .review-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .fact-grid, .card-grid-2, .card-grid-3, .deliverable-grid, .timeline, .review-grid, .glossary-grid { grid-template-columns: 1fr; }
  .chain-list li { grid-template-columns: 1fr; gap: .2rem; }
  .warning ul { columns: 1; }
  .footer-grid, .site-footer nav { flex-direction: column; }
}