:root {
    --navy: #143060;
    --navy-deep: #0C2046;
    --green: #36B34B;
    --green-text: #1D7A32;
    --yellow: #EDE928;
    --paper: #FFFFFF;
    --mist: #EEF2F7;
    --ink: #13213A;
    --muted: #4A5873;
    --line: #D5DDE8;
    --serif: "IBM Plex Serif", Georgia, "Times New Roman", serif;
    --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    --wrap: 1100px;
  }
  *, *::before, *::after { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--sans);
    font-size: 1.0625rem;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }
  img { max-width: 100%; display: block; }
  a { color: var(--navy); text-underline-offset: 3px; }
  a:focus-visible, button:focus-visible { outline: 3px solid var(--green); outline-offset: 3px; border-radius: 2px; }
  .wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
  h1, h2, h3 { font-family: var(--serif); font-weight: 500; line-height: 1.2; margin: 0; }
  h2 { font-size: clamp(1.75rem, 3.2vw, 2.4rem); color: var(--navy); max-width: 22ch; }
  h3 { font-size: 1.25rem; }
  p { margin: 0 0 1em; }
  .lead { font-size: 1.2rem; color: var(--muted); max-width: 62ch; }
  .prose { max-width: 66ch; }

  /* Header */
  header.site {
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    position: sticky; top: 0; z-index: 10;
  }
  header.site .wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; height: 72px; }
  .brand img { height: 40px; width: auto; }
  nav ul { list-style: none; display: flex; gap: 28px; margin: 0; padding: 0; }
  nav a { text-decoration: none; color: var(--ink); font-size: 0.95rem; font-weight: 500; }
  nav a:hover { color: var(--green-text); }
  .news-link { border: 1px solid var(--navy); border-radius: 999px; padding: 6px 16px; }
  .news-link:hover, .news-link[aria-current="page"] { background: var(--navy); color: #fff !important; }
  @media (max-width: 820px) { nav li.sec { display: none; } }

  /* News page */
  .page-head { background: var(--navy); color: #fff; padding: 64px 0 72px; }
  .page-head h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); font-weight: 400; }
  .page-head p { margin: 18px 0 0; font-size: 1.15rem; color: #D6DFEE; max-width: 56ch; }
  .post { max-width: 760px; }
  .post { padding: 40px 0; border-bottom: 1px solid var(--line); }
  .post:first-child { padding-top: 0; }
  .post-meta { display: flex; gap: 14px; align-items: center; font-size: 0.95rem; color: var(--muted); margin-bottom: 10px; }
  .tag { font-size: 0.85rem; padding: 2px 12px; border-radius: 999px; border: 1px solid currentColor; }
  .tag.event { color: var(--green-text); }
  .tag.publication { color: var(--navy); }
  .tag.announcement { color: #7A5A00; }
  .post h2 { font-size: 1.6rem; max-width: none; margin-bottom: 12px; }
  .post p { max-width: 66ch; }
  .post .more { font-weight: 500; }
  .empty-note { color: var(--muted); margin-top: 40px; }
  .post figure { margin: 24px 0 0; }
  .post figure img { width: 100%; height: auto; }
  .post figcaption { margin-top: 10px; font-size: 0.9rem; color: var(--muted); }

  /* Hero */
  .hero { background: var(--navy); color: #fff; padding: 88px 0 96px; position: relative; overflow: hidden; }
  .hero h1 { font-size: clamp(2.4rem, 6vw, 4.4rem); font-weight: 400; max-width: 16ch; letter-spacing: -0.01em; }
  .hero .sub { margin-top: 28px; font-size: 1.2rem; max-width: 52ch; color: #D6DFEE; }
  .hero .meta { margin-top: 40px; font-size: 0.95rem; color: #AFC0DA; }
  .hero .meta strong { color: #fff; font-weight: 500; }
  .hero-layers { position: absolute; right: -60px; bottom: -40px; width: 420px; opacity: 0.16; pointer-events: none; }
  @media (max-width: 900px) { .hero-layers { display: none; } }

  section { padding: 96px 0; }
  section.alt { background: var(--mist); }
  .section-head { display: grid; gap: 20px; margin-bottom: 48px; }
  .two-col .section-head { margin-bottom: 28px; }

  /* Challenge */
  .two-col { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 64px; align-items: start; }
  @media (max-width: 860px) { .two-col { grid-template-columns: 1fr; gap: 40px; } }
  .actors { border-left: 3px solid var(--green); padding-left: 24px; }
  .actors h3 { font-size: 1.05rem; font-family: var(--sans); font-weight: 600; margin-bottom: 12px; color: var(--navy); }
  .actors ul { margin: 0; padding: 0; list-style: none; }
  .actors li { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .actors li:last-child { border-bottom: 0; }
  .actors b { font-weight: 600; }

  /* Continuum — the signature element */
  .continuum { margin-top: 8px; }
  .track-wrap { padding: 24px 0 12px; }
  .track {
    position: relative; height: 10px; border-radius: 5px;
    background: linear-gradient(90deg, var(--green) 0%, #2A8C6A 50%, var(--navy) 100%);
  }
  .ends { display: flex; justify-content: space-between; font-family: var(--serif); font-size: 1.1rem; color: var(--navy); margin-bottom: 14px; }
  .ends span:first-child { color: var(--green-text); }
  .node {
    position: absolute; top: 50%; width: 22px; height: 22px; border-radius: 50%;
    background: #fff; border: 4px solid var(--c); transform: translate(-50%, -50%);
  }
  .node.n1 { left: 16.66%; --c: var(--green); }
  .node.n2 { left: 50%; --c: #2A8C6A; }
  .node.n3 { left: 83.33%; --c: var(--navy); }
  .lenses { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 28px; }
  .lens { background: var(--paper); border-top: 4px solid var(--c); padding: 28px 26px 30px; }
  .lens.l1 { --c: var(--green); }
  .lens.l2 { --c: #2A8C6A; }
  .lens.l3 { --c: var(--navy); }
  .lens .disc { font-size: 0.9rem; color: var(--muted); margin-bottom: 6px; }
  .lens h3 { color: var(--navy); margin-bottom: 14px; }
  .lens .gap { font-size: 0.97rem; color: var(--muted); padding-bottom: 14px; margin-bottom: 14px; border-bottom: 1px solid var(--line); }
  .lens .do { font-size: 1rem; margin: 0; }
  .lens .do b { font-weight: 600; color: var(--c); }
  .lens.l1 .do b { color: var(--green-text); }
  .continuum-note { margin-top: 40px; font-family: var(--serif); font-size: 1.3rem; line-height: 1.5; color: var(--navy); max-width: 58ch; }
  @media (max-width: 860px) {
    .track-wrap { display: none; }
    .lenses { grid-template-columns: 1fr; }
    .lens { border-top: 0; border-left: 4px solid var(--c); }
  }

  /* Deliverables */
  .knowledge { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .knowledge div { padding: 28px 28px 28px 0; }
  .knowledge div + div { padding-left: 28px; border-left: 1px solid var(--line); }
  .knowledge h3 { color: var(--navy); margin-bottom: 8px; }
  .knowledge p { margin: 0; color: var(--muted); font-size: 0.98rem; }
  @media (max-width: 860px) {
    .knowledge { grid-template-columns: 1fr; }
    .knowledge div, .knowledge div + div { padding: 22px 0; border-left: 0; }
    .knowledge div + div { border-top: 1px solid var(--line); }
  }
  .outputs { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; margin-top: 56px; }
  @media (max-width: 860px) { .outputs { grid-template-columns: 1fr; gap: 40px; } }
  .outputs h3 { font-family: var(--sans); font-size: 1.05rem; font-weight: 600; color: var(--navy); margin-bottom: 14px; }
  .tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 0; padding: 0; list-style: none; }
  .tags li { border: 1px solid var(--navy); color: var(--navy); padding: 6px 14px; border-radius: 999px; font-size: 0.95rem; }
  .tags.use li { border-color: var(--green-text); color: var(--green-text); }
  .impact { margin-top: 56px; padding-top: 32px; border-top: 1px solid var(--line); }
  .impact h3 { font-family: var(--sans); font-size: 1.05rem; font-weight: 600; color: var(--navy); margin-bottom: 8px; }
  .path { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-top: 10px; font-family: var(--serif); font-size: 1.25rem; color: var(--navy); }
  .path span.arrow { color: var(--green); font-family: var(--sans); }

  /* Manifesto */
  .manifesto { background: var(--navy-deep); color: #fff; }
  .manifesto h2 { color: #fff; max-width: 28ch; }
  .manifesto .lead { color: #C3D0E4; }
  .manifesto ol { list-style: none; counter-reset: p; margin: 40px 0 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 0 56px; }
  .manifesto li { counter-increment: p; padding: 18px 0 18px 52px; border-top: 1px solid rgba(255,255,255,0.18); position: relative; font-size: 1.05rem; }
  .manifesto li::before { content: counter(p, decimal-leading-zero); position: absolute; left: 0; top: 18px; font-family: var(--serif); color: var(--yellow); }
  @media (max-width: 860px) { .manifesto ol { grid-template-columns: 1fr; } }
  .cite { margin-top: 36px; font-size: 0.88rem; color: #9FB1CE; max-width: 90ch; }

  /* Partners */
  .group + .group { margin-top: 44px; }
  .group h3 { font-family: var(--sans); font-size: 1rem; font-weight: 600; color: var(--muted); margin-bottom: 16px; }
  .logos { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 12px; list-style: none; margin: 0; padding: 0; }
  .logos li { background: #fff; border: 1px solid var(--line); height: 104px; display: flex; align-items: center; justify-content: center; padding: 18px 20px; }
  .logos img { max-width: 100%; width: auto; object-fit: contain; }

  /* Footer */
  footer { background: var(--navy); color: #C3D0E4; padding: 56px 0; font-size: 0.95rem; }
  footer .wrap { display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; }
  footer a { color: #fff; }
  footer strong { color: #fff; font-weight: 500; }
  @media (max-width: 760px) { footer .wrap { grid-template-columns: 1fr; } }

  @media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }