:root {
      color-scheme: light dark;
      --ink: #192d27;
      --muted: #52665d;
      --paper: #f7f8f2;
      --surface: #eef1e9;
      --line: #cbd5cb;
      --green: #245d49;
      --green-dark: #123d30;
      --green-soft: #dce9df;
      --gold: #a57527;
      --gold-soft: #f0e7d1;
      --white: #fffef9;
      --max: 78rem;
      --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
      --sans: "Avenir Next", Avenir, "Segoe UI", sans-serif;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body { margin: 0; background: var(--paper); color: var(--ink); font: 400 1rem/1.65 var(--sans); }
    a { color: inherit; }
    a:focus-visible, summary:focus-visible { outline: 3px solid var(--gold); outline-offset: 4px; }
    .skip { position: absolute; z-index: 5; top: -5rem; left: 1rem; padding: .75rem 1rem; background: var(--ink); color: var(--white); }
    .skip:focus { top: 1rem; }
    .wrap { width: min(100% - 3rem, var(--max)); margin-inline: auto; }
    .topbar { border-bottom: 1px solid var(--line); }
    .nav { min-height: 5.25rem; display: flex; justify-content: space-between; align-items: center; gap: 2rem; }
    .brand { display: inline-flex; align-items: center; gap: .65rem; color: var(--green-dark); font: 700 1.4rem/1 var(--serif); letter-spacing: -.04em; text-decoration: none; }
    .brand-mark { display: block; width: 2rem; height: 2rem; }
    .nav-links { display: flex; align-items: center; gap: clamp(1rem, 2.5vw, 2rem); font-size: .84rem; font-weight: 650; }
    .nav-links a { text-decoration: none; }
    .nav-links a:not(.sign-in):hover, .text-link:hover { color: var(--green); text-decoration: underline; text-underline-offset: .25em; }
    .sign-in { display: inline-flex; min-height: 44px; align-items: center; padding: .55rem 1rem; border: 1px solid var(--green); color: var(--green-dark); }
    .sign-in:hover { background: var(--green-dark); color: var(--white); }
    .hero { position: relative; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(18rem, .75fr); align-items: center; gap: clamp(3rem, 8vw, 8rem); padding-block: clamp(5rem, 11vw, 9rem) clamp(4.5rem, 8vw, 7rem); }
    .eyebrow { margin: 0 0 1rem; color: var(--green); font-size: .73rem; font-weight: 750; letter-spacing: .16em; text-transform: uppercase; }
    h1, h2, h3, p { margin-top: 0; }
    h1 { max-width: 10ch; margin-bottom: 1.5rem; font: 500 clamp(3.4rem, 8.4vw, 7.7rem)/.91 var(--serif); letter-spacing: -.075em; }
    .hero-copy { max-width: 42rem; color: var(--muted); font-size: clamp(1.08rem, 1.7vw, 1.3rem); }
    .hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.5rem; margin-top: 2rem; }
    .button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; padding: .75rem 1.15rem; background: var(--green-dark); color: var(--white); font-size: .9rem; font-weight: 700; text-decoration: none; }
    .button:hover { background: var(--green); }
    .text-link { font-size: .9rem; font-weight: 650; text-underline-offset: .25em; }
    .scope-note { max-width: 40rem; margin: 1.5rem 0 0; padding-left: 1rem; border-left: 2px solid var(--gold); color: var(--muted); font-size: .82rem; }
    .learning-map { position: relative; padding: 1.6rem 1.65rem 1.8rem; background: var(--green-dark); color: #edf3eb; }
    .learning-map::before { position: absolute; inset: .55rem -.55rem -.55rem .55rem; z-index: -1; border: 1px solid var(--gold); content: ""; }
    .map-label { margin-bottom: 1.25rem; color: #d6bd82; font-size: .7rem; font-weight: 750; letter-spacing: .14em; text-transform: uppercase; }
    .map-step { display: grid; grid-template-columns: 2.1rem 1fr; gap: .8rem; align-items: baseline; padding: .75rem 0; border-top: 1px solid #557265; }
    .map-step span { color: #d6bd82; font: 500 .84rem/1 var(--serif); }
    .map-step strong { font: 500 1.2rem/1.2 var(--serif); }
    .section { padding-block: clamp(4.5rem, 9vw, 8rem); border-top: 1px solid var(--line); }
    .section-head { display: grid; grid-template-columns: minmax(12rem, .55fr) minmax(0, 1fr); gap: clamp(2rem, 7vw, 7rem); align-items: end; margin-bottom: 3rem; }
    .section-head h2 { max-width: 17ch; margin: 0; font: 500 clamp(2.45rem, 5vw, 4.8rem)/.98 var(--serif); letter-spacing: -.06em; }
    .section-head p { max-width: 38rem; margin: 0; color: var(--muted); font-size: 1.03rem; }
    .audiences { display: grid; grid-template-columns: 1.15fr .95fr .9fr; gap: 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .audience { padding: 1.6rem clamp(1rem, 2.5vw, 2rem) 1.8rem 0; }
    .audience + .audience { padding-left: clamp(1rem, 2.5vw, 2rem); border-left: 1px solid var(--line); }
    .audience .index { color: var(--gold); font: 500 .9rem/1 var(--serif); }
    .audience h3 { margin: 1.2rem 0 .65rem; font: 500 1.55rem/1.1 var(--serif); }
    .audience p { margin: 0; color: var(--muted); font-size: .92rem; }
    .scope-band { background: var(--surface); }
    .scope-band .section { border-top: 0; }
    .stage-key { display: flex; flex-wrap: wrap; gap: .65rem 1.2rem; margin-top: 1.5rem; color: var(--muted); font-size: .78rem; }
    .stage-key span { display: inline-flex; align-items: center; gap: .45rem; }
    .stage-key i, .stage { display: inline-block; width: .55rem; height: .55rem; flex: 0 0 auto; background: var(--green); }
    .stage-key .advanced-dot, .stage.advanced { background: var(--gold); }
    .stage-key .future-dot, .stage.future { background: #6f817a; }
    .capability-list { border-top: 1px solid #bac7bd; }
    .capability { border-bottom: 1px solid #bac7bd; }
    .capability summary { display: grid; grid-template-columns: 3.4rem minmax(0, 1fr) auto 1.2rem; gap: 1rem; align-items: center; padding: 1.2rem .25rem; cursor: pointer; list-style: none; }
    .capability summary::-webkit-details-marker { display: none; }
    .capability summary::after { color: var(--green); content: "+"; font-size: 1.5rem; font-weight: 300; text-align: center; }
    .capability[open] summary::after { content: "−"; }
    .capability summary:hover .cap-title { color: var(--green); }
    .cap-num { color: var(--gold); font: 500 1rem/1 var(--serif); }
    .cap-title { font: 500 clamp(1.25rem, 2.3vw, 1.8rem)/1.15 var(--serif); letter-spacing: -.025em; }
    .cap-summary { color: var(--muted); font-size: .78rem; text-align: right; }
    .cap-content { display: grid; grid-template-columns: minmax(10rem, .7fr) minmax(0, 1.3fr); gap: 2rem; padding: .4rem 3rem 1.8rem 4.4rem; }
    .cap-content > p { max-width: 23rem; margin: 0; color: var(--muted); font-size: .9rem; }
    .features { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 1.5rem; margin: 0; padding: 0; list-style: none; }
    .features li { display: grid; grid-template-columns: .65rem 1fr; gap: .65rem; align-items: start; padding: .5rem 0; border-top: 1px solid #d1dad2; font-size: .85rem; line-height: 1.45; }
    .features .stage { margin-top: .4rem; }
    .feature-label { display: block; margin-top: .2rem; color: var(--muted); font-size: .7rem; }
    .roles { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(2rem, 7vw, 7rem); align-items: start; }
    .roles h2 { max-width: 12ch; margin: 0; font: 500 clamp(2.5rem, 5vw, 4.5rem)/.98 var(--serif); letter-spacing: -.06em; }
    .role-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
    .role-list li { display: grid; grid-template-columns: 11rem 1fr; gap: 1rem; padding: .85rem 0; border-bottom: 1px solid var(--line); }
    .role-list strong { font: 600 .9rem/1.5 var(--sans); }
    .role-list span { color: var(--muted); font-size: .88rem; }
    .closing { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 2rem; align-items: end; padding: clamp(2rem, 5vw, 4.5rem); background: var(--gold-soft); }
    .closing h2 { max-width: 16ch; margin: .45rem 0 .85rem; font: 500 clamp(2.4rem, 5vw, 4.4rem)/.98 var(--serif); letter-spacing: -.06em; }
    .closing p { max-width: 41rem; margin: 0; color: #4f594c; font-size: .95rem; }
    footer { display: flex; justify-content: space-between; gap: 1rem; padding-block: 1.5rem 2.5rem; color: var(--muted); font-size: .78rem; }
    footer p { margin: 0; }
    @media (max-width: 800px) {
      .hero { grid-template-columns: 1fr; gap: 3rem; }
      .learning-map { width: min(100% - .6rem, 34rem); }
      .section-head { grid-template-columns: 1fr; gap: 1rem; }
      .audiences { grid-template-columns: 1fr; }
      .audience, .audience + .audience { padding: 1.3rem 0; border-left: 0; }
      .audience + .audience { border-top: 1px solid var(--line); }
      .cap-content { grid-template-columns: 1fr; gap: 1rem; padding-left: 4.4rem; }
      .roles { grid-template-columns: 1fr; }
    }
    @media (max-width: 560px) {
      .wrap { width: min(100% - 2rem, var(--max)); }
      .nav { min-height: 4.5rem; }
      .nav-links { gap: .7rem; }
      .nav-links a:not(.sign-in) { display: none; }
      .sign-in { min-height: 42px; padding-inline: .75rem; font-size: .8rem; }
      .hero { padding-block: 4.5rem 4rem; }
      h1 { font-size: clamp(3.1rem, 17vw, 5rem); }
      .capability summary { grid-template-columns: 2rem minmax(0, 1fr) 1rem; gap: .6rem; }
      .cap-summary { display: none; }
      .cap-content { padding-left: 2.6rem; padding-right: 0; }
      .features { grid-template-columns: 1fr; }
      .role-list li { grid-template-columns: 1fr; gap: .2rem; }
      .closing { grid-template-columns: 1fr; align-items: start; padding: 1.5rem; }
      footer { flex-direction: column; }
    }
    @media (prefers-color-scheme: dark) {
      :root { --ink: #e5ede6; --muted: #b7c7bb; --paper: #17251f; --surface: #1d3027; --line: #405349; --green: #93c5a8; --green-dark: #dcebe0; --green-soft: #263b30; --gold: #d8b46b; --gold-soft: #3b3423; --white: #15221c; }
      .brand { color: var(--green); }
      .sign-in { color: var(--green); }
      .sign-in:hover { background: var(--green); color: #14231c; }
      .button { background: #c4e0ce; color: #16392c; }
      .button:hover { background: #e2efdf; }
      .learning-map { background: #244334; }
      .map-step { border-color: #617c6b; }
      .capability-list, .capability, .features li { border-color: #405349; }
      .cap-content > p, .feature-label { color: #b7c7bb; }
      .closing p { color: #d2d3c5; }
    }
    @media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }