:root {
    --navy:   #0C2438;
    --navy-2: #113049;
    --accent: #307090;
    --pale:   #CADCFC;
    --panel:  #EFF4F8;
    --ink:    #22313C;
    --muted:  #5C6E7B;
    --rule:   #DCE5EC;
    --white:  #FFFFFF;
    --serif:  Cambria, Georgia, "Times New Roman", serif;
    --sans:   Calibri, "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
    --wrap:   68rem;
  }
  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; scroll-padding-top: 84px; }
  body {
    margin: 0;
    background: var(--white);
    color: var(--ink);
    font-family: var(--sans);
    font-size: 17px;
    line-height: 1.62;
    -webkit-font-smoothing: antialiased;
  }
  .wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 2rem; }
  a { color: var(--accent); }

  /* ---------- header ---------- */
  header.site {
    position: sticky; top: 0; z-index: 20;
    background: var(--navy);
    border-bottom: 1px solid rgba(202,220,252,0.16);
  }
  header.site .wrap {
    display: flex; align-items: center; gap: 1.5rem;
    min-height: 66px;
  }
  .brand { display: flex; align-items: center; gap: 0.7rem; text-decoration: none; margin-right: auto; }
  .brand img { width: 34px; height: 34px; border-radius: 5px; display: block; }
  .brand span {
    font-family: var(--serif); color: var(--white);
    font-size: 1.02rem; letter-spacing: 0.02em; white-space: nowrap;
  }
  nav.site { display: flex; gap: 1.6rem; }
  nav.site a {
    color: var(--pale); text-decoration: none;
    font-size: 0.83rem; letter-spacing: 0.11em; text-transform: uppercase;
    padding: 0.35rem 0; border-bottom: 1px solid transparent;
  }
  nav.site a:hover { color: var(--white); border-bottom-color: var(--accent); }

  /* ---------- hero ---------- */
  .hero {
    background: var(--navy);
    background-image:
      radial-gradient(120% 90% at 78% 8%, rgba(48,112,144,0.30) 0%, rgba(12,36,56,0) 62%);
    color: var(--white);
    padding: 5.5rem 0 4.5rem;
    border-bottom: 3px solid var(--accent);
  }
  .hero .wrap { display: grid; grid-template-columns: 1.25fr 0.85fr; gap: 4rem; align-items: center; }
  .eyebrow {
    font-size: 0.72rem; font-weight: 700; letter-spacing: 0.26em;
    color: var(--pale); text-transform: uppercase; margin: 0 0 1.3rem;
  }
  .hero h1 {
    font-family: var(--serif); font-weight: 700;
    font-size: clamp(2rem, 4.6vw, 3.15rem); line-height: 1.1;
    margin: 0 0 1rem; letter-spacing: -0.005em;
  }
  .hero .tagline {
    font-family: var(--serif); font-style: italic;
    font-size: clamp(1.05rem, 2vw, 1.32rem); color: var(--pale);
    margin: 0 0 2.4rem;
  }
  .actions { display: flex; flex-wrap: wrap; gap: 0.9rem; }
  .btn {
    display: inline-block; text-decoration: none;
    font-size: 0.86rem; letter-spacing: 0.09em; text-transform: uppercase;
    padding: 0.85rem 1.6rem; border: 1px solid var(--accent);
    transition: background 0.15s ease, color 0.15s ease;
  }
  .btn.primary { background: var(--accent); color: var(--white); }
  .btn.primary:hover { background: #3D87AA; border-color: #3D87AA; }
  .btn.ghost { color: var(--pale); border-color: rgba(202,220,252,0.42); }
  .btn.ghost:hover { color: var(--white); border-color: var(--pale); }
  .hero figure { margin: 0; }
  .hero figure img { width: 100%; height: auto; display: block; border-radius: 4px; }

  /* ---------- figures strip ---------- */
  .strip { background: var(--panel); border-bottom: 1px solid var(--rule); }
  .strip .wrap {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 2rem; padding-top: 2.4rem; padding-bottom: 2.4rem;
  }
  .fig .n {
    font-family: var(--serif); font-size: 1.5rem; color: var(--navy);
    line-height: 1.1; display: block; margin-bottom: 0.35rem;
  }
  .fig p { margin: 0; font-size: 0.9rem; color: var(--muted); line-height: 1.45; }

  /* ---------- sections ---------- */
  section { padding: 5rem 0; }
  section + section { border-top: 1px solid var(--rule); }
  .kicker {
    font-size: 0.72rem; font-weight: 700; letter-spacing: 0.24em;
    text-transform: uppercase; color: var(--accent); margin: 0 0 0.9rem;
  }
  h2 {
    font-family: var(--serif); font-weight: 700; color: var(--navy);
    font-size: clamp(1.5rem, 3vw, 2.05rem); line-height: 1.2;
    margin: 0 0 1.6rem; letter-spacing: -0.005em;
  }
  .split { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 4.5rem; align-items: start; }
  .split .head { position: sticky; top: 96px; }
  .split h2 { margin-bottom: 0; }
  .lede { max-width: 46rem; }
  .lede p { margin: 0 0 1.15rem; font-size: 1.06rem; }
  .lede p:last-child { margin-bottom: 0; }
  .lede b { color: var(--navy); font-weight: 600; }

  .mission {
    margin: 2.6rem 0 0; padding: 1.5rem 2rem;
    background: var(--panel); border-left: 4px solid var(--accent);
    font-family: var(--serif); font-style: italic;
    font-size: 1.16rem; line-height: 1.5; color: var(--navy);
    max-width: 46rem;
  }
  .mission b { font-style: normal; font-weight: 700; }

  /* ---------- pillar cards ---------- */
  .cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
  .card {
    background: var(--panel); border-radius: 3px;
    padding: 2rem 1.9rem; border-top: 3px solid var(--accent);
  }
  .card h3 {
    font-family: var(--serif); font-size: 1.18rem; color: var(--navy);
    margin: 0 0 0.35rem; font-weight: 700;
  }
  .card .when {
    font-size: 0.72rem; letter-spacing: 0.18em; text-transform: uppercase;
    color: var(--accent); margin: 0 0 1rem;
  }
  .card p.txt { margin: 0; font-size: 0.97rem; line-height: 1.6; }
  .card.navy { background: var(--navy); border-top-color: var(--pale); }
  .card.navy h3 { color: var(--white); }
  .card.navy .when { color: var(--pale); }
  .card.navy p.txt { color: #D9E6F5; }

  /* ---------- contact ---------- */
  .contact { background: var(--navy); color: var(--white); padding: 4.5rem 0; border-top: 3px solid var(--accent); }
  .contact h2 { color: var(--white); }
  .contact .kicker { color: var(--pale); }
  .contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3.5rem; align-items: start; }
  .contact p.say { color: #D9E6F5; font-size: 1.04rem; margin: 0; max-width: 30rem; }
  .clist { list-style: none; margin: 0; padding: 0; }
  .clist li { padding: 0.85rem 0; border-bottom: 1px solid rgba(202,220,252,0.18); display: flex; gap: 1.2rem; align-items: baseline; }
  .clist li:first-child { border-top: 1px solid rgba(202,220,252,0.18); }
  .clist .lbl { font-size: 0.72rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--pale); min-width: 6.5rem; }
  .clist a { color: var(--white); text-decoration: none; border-bottom: 1px solid rgba(202,220,252,0.45); word-break: break-word; }
  .clist a:hover { border-bottom-color: var(--white); }
  .clist .val { color: var(--white); }

  footer.site {
    background: #08192A; color: var(--pale);
    padding: 1.7rem 0; font-size: 0.85rem;
  }
  footer.site .wrap { display: flex; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; }
  footer.site b { color: var(--white); font-weight: 600; }

  /* ---------- responsive ---------- */
  @media (max-width: 1000px) {
    .hero .wrap { grid-template-columns: 1fr; gap: 3rem; }
    .hero figure { max-width: 24rem; }
    .strip .wrap { grid-template-columns: repeat(2, 1fr); gap: 1.8rem; }
    .cards { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
    .split { grid-template-columns: 1fr; gap: 2rem; }
    .split .head { position: static; }
  }
  @media (max-width: 780px) {
    nav.site { display: none; }
    .wrap { padding: 0 1.4rem; }
    .hero { padding: 3.8rem 0 3.2rem; }
    section { padding: 3.5rem 0; }
    .mission { padding: 1.2rem 1.4rem; font-size: 1.06rem; }
    .clist li { flex-direction: column; gap: 0.2rem; }
  }

/* ---------- research page ---------- */
.page-hero { background: var(--navy); color: var(--white); padding: 4.2rem 0 3.4rem; border-bottom: 3px solid var(--accent);
  background-image: radial-gradient(110% 90% at 82% 0%, rgba(48,112,144,0.28) 0%, rgba(12,36,56,0) 60%); }
.page-hero h1 { font-family: var(--serif); font-weight: 700; font-size: clamp(1.9rem, 4vw, 2.9rem);
  line-height: 1.12; margin: 0 0 0.9rem; }
.page-hero .sub { color: var(--pale); font-size: 1.05rem; margin: 0; max-width: 44rem; }
.page-hero .meta { color: rgba(202,220,252,0.72); font-size: 0.88rem; margin: 1.4rem 0 0; }
.epigraph { margin: 2.6rem 0 0; padding: 1.4rem 1.8rem; border-left: 3px solid var(--accent);
  background: rgba(202,220,252,0.07); font-family: var(--serif); font-style: italic;
  font-size: 1.06rem; line-height: 1.5; color: var(--pale); max-width: 46rem; }

.legend { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; margin: 0; padding: 0; list-style: none; }
.legend li { background: var(--panel); padding: 1.1rem 1.2rem; border-radius: 3px; font-size: 0.9rem;
  line-height: 1.5; color: var(--muted); }
.legend li b { display: block; margin-bottom: 0.4rem; }

.status { display: inline-block; font-size: 0.66rem; letter-spacing: 0.13em; text-transform: uppercase;
  padding: 0.2rem 0.55rem; border-radius: 2px; white-space: nowrap; vertical-align: 0.15em; font-weight: 600; }
.status.runnable { background: var(--accent); color: var(--white); }
.status.pilot { background: var(--pale); color: var(--navy); }
.status.theory { background: transparent; color: var(--muted); border: 1px solid var(--rule); }
.status.speculative { background: transparent; color: var(--muted); border: 1px dashed var(--rule); font-style: italic; }
.status.applied { background: var(--navy); color: var(--white); }

.contents { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.9rem 1.4rem; margin: 0; padding: 0; list-style: none; }
.contents a { display: block; text-decoration: none; color: var(--navy); font-size: 0.95rem;
  padding: 0.7rem 0.9rem; background: var(--panel); border-left: 2px solid var(--accent); border-radius: 2px; }
.contents a:hover { background: #E4EDF4; }
.contents .num { color: var(--accent); font-family: var(--serif); margin-right: 0.5rem; }

.field { padding: 3.2rem 0; }
.field + .field { border-top: 1px solid var(--rule); }
.field > .wrap > h2 { display: flex; gap: 0.9rem; align-items: baseline; margin-bottom: 2rem; }
.field h2 .num { color: var(--accent); font-size: 0.62em; letter-spacing: 0.05em; }
.items { display: grid; gap: 2rem; max-width: 52rem; }
.item h3 { font-family: var(--serif); font-size: 1.1rem; color: var(--navy); font-weight: 700;
  margin: 0 0 0.55rem; line-height: 1.35; }
.item h3 .idx { color: var(--accent); font-weight: 400; margin-right: 0.5rem; }
.item h3 .status { margin-left: 0.6rem; }
.item p { margin: 0; font-size: 0.99rem; line-height: 1.62; color: var(--ink); }
.m { font-family: Cambria, Georgia, serif; font-style: italic; color: var(--navy); white-space: nowrap; }

.tablewrap { overflow-x: auto; border: 1px solid var(--rule); border-radius: 3px; }
table.glance { border-collapse: collapse; width: 100%; min-width: 46rem; font-size: 0.9rem; }
table.glance th, table.glance td { text-align: left; vertical-align: top; padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--rule); }
table.glance thead th { background: var(--navy); color: var(--pale); font-family: var(--sans);
  font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase; font-weight: 600; }
table.glance tbody th { font-family: var(--serif); color: var(--navy); font-weight: 700; white-space: nowrap; }
table.glance td { color: var(--muted); }
table.glance tr:last-child th, table.glance tr:last-child td { border-bottom: 0; }
.caption { font-size: 0.88rem; color: var(--muted); margin: 0.9rem 0 0; line-height: 1.55; max-width: 46rem; }

@media (max-width: 1000px) {
  .legend, .contents { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 780px) {
  .legend, .contents { grid-template-columns: 1fr; }
  .page-hero { padding: 3rem 0 2.6rem; }
  .field { padding: 2.6rem 0; }
  .epigraph { padding: 1.1rem 1.3rem; }
  .item h3 .status { margin-left: 0; display: inline-block; margin-top: 0.35rem; }
}

/* ---------- research: anchors, glossary, filter ---------- */
.sub-h { font-family: var(--serif); color: var(--navy); font-size: 1.05rem; font-weight: 700; margin: 3rem 0 0.9rem; }
.note { font-size: 0.97rem; color: var(--muted); max-width: 46rem; margin: 0 0 1.4rem; line-height: 1.6; }

.glossary { margin: 0; padding: 0; border-top: 1px solid var(--rule); max-width: 52rem; }
.glossary dt { font-family: var(--serif); color: var(--navy); font-weight: 700; font-size: 0.98rem;
  margin: 0; padding: 0.85rem 0 0.15rem; }
.glossary dd { margin: 0 0 0.85rem; padding: 0 0 0.85rem; border-bottom: 1px solid var(--rule);
  font-size: 0.95rem; color: var(--muted); line-height: 1.55; }

.item { scroll-margin-top: 92px; }
a.idx { color: var(--accent); font-weight: 400; margin-right: 0.5rem; text-decoration: none;
  border-bottom: 1px solid transparent; }
a.idx:hover { border-bottom-color: var(--accent); }
.item:target { background: var(--panel); border-left: 3px solid var(--accent);
  padding: 1.1rem 1.3rem; margin: -1.1rem -1.3rem -1.1rem -1.6rem; border-radius: 0 3px 3px 0; }

.filterbar { display: flex; flex-wrap: wrap; gap: 0.55rem; align-items: center; margin: 2.6rem 0 0;
  padding-top: 1.6rem; border-top: 1px solid var(--rule); }
.filterbar .flabel { font-size: 0.7rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--muted); margin-right: 0.4rem; }
.filterbar button { font-family: var(--sans); font-size: 0.84rem; color: var(--navy);
  background: var(--white); border: 1px solid var(--rule); border-radius: 2px;
  padding: 0.42rem 0.85rem; cursor: pointer; transition: background 0.12s ease, color 0.12s ease; }
.filterbar button:hover { background: var(--panel); }
.filterbar button[aria-pressed="true"] { background: var(--navy); border-color: var(--navy); color: var(--white); }
.filterbar .fcount { font-size: 0.85rem; color: var(--muted); margin-left: 0.5rem; }

/* ---------- research header blocks ---------- */
.byline { font-size: 0.96rem; color: var(--muted); margin: 0.4rem 0 0 !important; }
.byline a { color: var(--accent); text-decoration: none; border-bottom: 1px solid var(--pale); }
.byline a:hover { border-bottom-color: var(--accent); }

.person { max-width: 52rem; border-top: 1px solid var(--rule); padding-top: 1.5rem; }
.person + .person { margin-top: 2rem; }
.person h3 { font-family: var(--serif); font-size: 1.3rem; color: var(--navy); font-weight: 700; margin: 0 0 0.15rem; }
.person .role { font-size: 0.78rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); margin: 0 0 1rem; }
.person p { margin: 0 0 0.9rem; font-size: 1rem; }
.person .ids { margin: 0; font-size: 0.92rem; }
.person .ids a { color: var(--accent); text-decoration: none; border-bottom: 1px solid var(--rule); }
.person .ids a:hover { border-bottom-color: var(--accent); }

.pubs { list-style: none; margin: 0; padding: 0; max-width: 52rem; }
.pubs li { padding-left: 1.15rem; position: relative; margin-bottom: 1.15rem; line-height: 1.55; }
.pubs li::before { content: "▪"; position: absolute; left: 0; color: var(--accent); }
.pubs .t { display: block; color: var(--navy); font-weight: 600; font-size: 0.98rem; }
.pubs .src { color: var(--muted); font-size: 0.92rem; }
.pubs .src a { color: var(--accent); text-decoration: none; border-bottom: 1px solid var(--rule); }
.pubs .src a:hover { border-bottom-color: var(--accent); }

.downloads { list-style: none; margin: 0; padding: 0; max-width: 52rem; border-top: 1px solid var(--rule); }
.downloads li { display: flex; justify-content: space-between; align-items: baseline; gap: 1.5rem;
  padding: 0.85rem 0; border-bottom: 1px solid var(--rule); }
.downloads a { color: var(--navy); text-decoration: none; font-family: var(--serif); font-size: 1.02rem;
  border-bottom: 1px solid var(--pale); }
.downloads a:hover { color: var(--accent); border-bottom-color: var(--accent); }
.downloads .kind { font-family: var(--sans); font-size: 0.66rem; letter-spacing: 0.13em;
  text-transform: uppercase; color: var(--muted); margin-left: 0.5rem; }
.downloads .size { font-size: 0.82rem; color: var(--muted); white-space: nowrap; }

.statement { max-width: 52rem; background: var(--panel); border-left: 4px solid var(--accent);
  padding: 1.7rem 2rem; border-radius: 0 3px 3px 0; }
.statement p { margin: 0 0 1rem; font-size: 1rem; line-height: 1.62; }
.statement p:last-child { margin-bottom: 0; }
.contact .say p { color: #D9E6F5; font-size: 1rem; margin: 0 0 1rem; }
.contact .say p:last-child { margin-bottom: 0; }

@media (max-width: 780px) {
  .downloads li { flex-direction: column; gap: 0.25rem; }
  .statement { padding: 1.2rem 1.4rem; }
}

.notice { max-width: 52rem; background: var(--panel); border-left: 3px solid var(--accent);
  padding: 0.95rem 1.3rem; margin: 0 0 1.3rem; font-size: 0.97rem; line-height: 1.55; color: var(--navy); }