:root {
    --ink: #0B1220; --ink-2: #111A2B; --ink-3: #182338;
    --cream: #EDE6D6; --cream-2: #CFC6B2; --muted: #8A94A6; --rule: rgba(237,230,214,0.14);
    --cyan: #5FD3E6; --cyan-dim: rgba(95,211,230,0.12);
    --g: #A7B4FF; --c: #D8B4FE; --k: #7EDDEB; --d: #9BE3A6;
    --serif: "Newsreader", Georgia, "Times New Roman", serif;
    --sans: "IBM Plex Sans", -apple-system, "Segoe UI", Roboto, sans-serif;
    --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  }
  * { box-sizing: border-box; margin: 0; }
  html { scroll-behavior: smooth; }
  body { background: var(--ink); color: var(--cream-2); font-family: var(--sans); font-size: 17px; line-height: 1.6; -webkit-font-smoothing: antialiased; }
  a { color: var(--cyan); text-decoration: none; border-bottom: 1px solid rgba(95,211,230,.35); }
  a:hover { border-bottom-color: var(--cyan); }
  .wrap { max-width: 76rem; margin: 0 auto; padding: 0 2rem; }
  h1, h2, h3 { font-family: var(--serif); color: var(--cream); font-weight: 400; letter-spacing: -0.01em; }
  .mark { display: inline-grid; place-items: center; width: 36px; height: 36px; border-radius: 8px; background: var(--cream); color: var(--ink); font-family: var(--serif); font-size: 20px; line-height: 1; }

  header { position: sticky; top: 0; z-index: 10; background: rgba(11,18,32,.86); backdrop-filter: blur(10px); border-bottom: 1px solid var(--rule); }
  nav { display: flex; align-items: center; gap: 2rem; padding: .9rem 0; }
  nav .brand { display: flex; align-items: center; gap: .7rem; color: var(--cream); font-family: var(--serif); font-size: 1.25rem; border: 0; }
  nav ul { list-style: none; display: flex; gap: 1.6rem; margin-left: auto; padding: 0; }
  nav ul a { color: var(--muted); border: 0; font-size: .92rem; }
  nav ul a:hover { color: var(--cream); }
  nav ul a.go { color: var(--ink); background: var(--cream); padding: .5rem .9rem; border-radius: 6px; font-weight: 500; }
  .status { border-bottom: 1px solid var(--rule); font-size: .86rem; color: var(--muted); padding: .55rem 0; }
  .status b { color: var(--cream); font-weight: 500; }
  .status .dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); margin: 0 .5rem 1px 0; }

  /* hero: editorial two-column, no gradient, no diagram */
  .hero { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 4rem; padding: 6rem 0 5rem; align-items: end; border-bottom: 1px solid var(--rule); }
  .hero h1 { font-size: clamp(2.6rem, 5.4vw, 4.4rem); line-height: 1.05; font-weight: 300; max-width: 15ch; }
  .hero h1 em { font-style: italic; font-weight: 400; color: var(--cyan); }
  .hero p { font-size: 1.15rem; max-width: 34rem; margin-top: 1.6rem; color: var(--cream-2); }
  .hero .cta { display: flex; gap: 1.6rem; align-items: center; margin-top: 2.2rem; }
  .btn { display: inline-block; background: var(--cream); color: var(--ink); padding: .8rem 1.3rem; border-radius: 6px; font-weight: 500; border: 0; font-family: var(--sans); font-size: .98rem; }
  .btn:hover { background: #fff; }
  .hero aside { border-left: 1px solid var(--rule); padding-left: 2rem; font-size: .95rem; color: var(--muted); }
  .hero aside .k { font-family: var(--mono); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--cyan); margin-bottom: .8rem; }
  .hero aside p { font-size: .95rem; margin-top: 0; color: var(--muted); }
  .hero aside p + p { margin-top: .8rem; }
  .hero aside b { color: var(--cream); font-weight: 500; }

  section { padding: 5rem 0; border-bottom: 1px solid var(--rule); }
  .sec { display: grid; grid-template-columns: 11rem minmax(0, 1fr); gap: 2rem; }
  .sec .no { font-family: var(--mono); font-size: .74rem; letter-spacing: .14em; text-transform: uppercase; color: var(--cyan); padding-top: .55rem; }
  .sec h2 { font-size: clamp(1.9rem, 3.4vw, 2.7rem); line-height: 1.15; max-width: 22ch; margin-bottom: 1.2rem; }
  .sec .lede { font-size: 1.1rem; max-width: 40rem; color: var(--cream-2); }
  .sec .lede + .lede { margin-top: 1rem; }

  /* roster table */
  .roster { width: 100%; border-collapse: collapse; margin-top: 2.2rem; font-size: .96rem; }
  .roster th { text-align: left; font-family: var(--mono); font-size: .7rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); font-weight: 500; padding: 0 1rem .7rem 0; border-bottom: 1px solid var(--rule); }
  .roster td { padding: 1.1rem 1rem 1.1rem 0; border-bottom: 1px solid var(--rule); vertical-align: top; color: var(--cream-2); }
  .roster td.name { font-family: var(--serif); font-size: 1.35rem; color: var(--cream); white-space: nowrap; }
  .roster td.name small { display: block; font-family: var(--mono); font-size: .7rem; letter-spacing: .1em; color: var(--muted); margin-top: .2rem; text-transform: uppercase; }
  .roster tr.you td { background: rgba(237,230,214,.04); }
  .roster tr.you td.name { color: var(--cyan); }
  .roster tr.you td:first-child { border-left: 2px solid var(--cyan); padding-left: 1rem; }
  .roster td.model { font-family: var(--mono); font-size: .8rem; color: var(--muted); white-space: nowrap; }
  .roster td .like { color: var(--muted); font-style: italic; font-family: var(--serif); font-size: 1.02rem; }
  .roster .sw { display: inline-block; width: 9px; height: 9px; border-radius: 2px; margin-right: .5rem; vertical-align: 1px; }

  /* transcript */
  .transcript { margin-top: 2.2rem; border: 1px solid var(--rule); border-radius: 8px; background: var(--ink-2); font-family: var(--mono); font-size: .86rem; line-height: 1.55; overflow-x: auto; }
  .transcript .chan { padding: .6rem 1.1rem; border-bottom: 1px solid var(--rule); color: var(--muted); font-size: .76rem; letter-spacing: .06em; }
  .transcript .chan b { color: var(--cream); font-weight: 500; }
  .transcript ol { list-style: none; padding: .9rem 1.1rem 1rem; display: grid; gap: .55rem; min-width: 34rem; }
  .transcript li { display: grid; grid-template-columns: 4.2rem 6.2rem 1fr; gap: 1rem; align-items: baseline; }
  .transcript .t { color: var(--muted); font-size: .76rem; }
  .transcript .who { font-weight: 500; }
  .transcript .you .who { color: var(--cyan); }
  .transcript .you .msg { color: var(--cream); }
  .transcript .msg { color: var(--cream-2); }
  .transcript .g .who { color: var(--g); } .transcript .c .who { color: var(--c); } .transcript .k .who { color: var(--k); } .transcript .d .who { color: var(--d); }
  .transcript .sys { color: var(--muted); font-style: italic; }
  .transcript .msg code { color: var(--cream); background: rgba(237,230,214,.08); padding: 0 .3em; border-radius: 3px; }
  .caption { font-size: .88rem; color: var(--muted); margin-top: .8rem; max-width: 40rem; }

  /* two-column rules (syllabus policy box) */
  .policy { display: grid; grid-template-columns: 1fr 1fr; margin-top: 2.2rem; border: 1px solid var(--rule); border-radius: 8px; overflow: hidden; }
  .policy > div { padding: 1.6rem 1.8rem; }
  .policy > div + div { border-left: 1px solid var(--rule); }
  .policy h3 { font-family: var(--mono); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; font-weight: 500; margin-bottom: 1rem; }
  .policy .you { background: rgba(95,211,230,.05); } .policy .you h3 { color: var(--cyan); } .policy .them h3 { color: var(--muted); }
  .policy ul { list-style: none; padding: 0; display: grid; gap: .55rem; }
  .policy li { position: relative; padding-left: 1.3rem; font-size: .97rem; }
  .policy .you li { color: var(--cream); } .policy .them li { color: var(--muted); }
  .policy .you li::before { content: "—"; position: absolute; left: 0; color: var(--cyan); }
  .policy .them li::before { content: "×"; position: absolute; left: 0; color: var(--muted); }

  /* principles list (numbered, hanging) */
  .principles { list-style: none; padding: 0; margin-top: 2rem; display: grid; gap: 1.6rem; max-width: 44rem; }
  .principles li { display: grid; grid-template-columns: 3.2rem 1fr; gap: 1rem; }
  .principles .n { font-family: var(--serif); font-size: 1.9rem; line-height: 1; color: var(--cyan); font-weight: 300; }
  .principles h3 { font-size: 1.35rem; margin-bottom: .35rem; }
  .principles p { color: var(--cream-2); font-size: .98rem; }

  /* four takes */
  .takes { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; margin-top: 2rem; }
  .take { border-left: 2px solid var(--muted); padding: .2rem 0 .2rem 1.2rem; }
  .take .who { font-family: var(--mono); font-size: .74rem; letter-spacing: .1em; text-transform: uppercase; margin-bottom: .35rem; }
  .take p { font-family: var(--serif); font-size: 1.12rem; color: var(--cream); line-height: 1.45; }
  .take.g { border-color: var(--g); } .take.g .who { color: var(--g); }
  .take.c { border-color: var(--c); } .take.c .who { color: var(--c); }
  .take.k { border-color: var(--k); } .take.k .who { color: var(--k); }
  .take.d { border-color: var(--d); } .take.d .who { color: var(--d); }

  .verdicts { display: flex; flex-wrap: wrap; gap: .5rem .6rem; margin-top: 1.4rem; }
  .verdicts code { font-family: var(--mono); font-size: .86rem; color: var(--cream); border: 1px solid var(--rule); border-radius: 4px; padding: .35rem .7rem; }
  .verdicts code b { color: var(--cyan); font-weight: 500; }

  .who-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; margin-top: 2rem; }
  .who-grid h3 { font-size: 1.3rem; margin-bottom: .4rem; }
  .who-grid p { color: var(--muted); font-size: .96rem; }
  .note { border: 1px solid var(--rule); border-radius: 8px; padding: 1.6rem 1.8rem; margin-top: 2.2rem; max-width: 44rem; }
  .note .k { font-family: var(--mono); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: var(--cyan); margin-bottom: .6rem; }
  .note p { color: var(--cream-2); font-size: .98rem; }
  .note .cta { margin-top: 1.2rem; display: flex; gap: 1.4rem; align-items: center; }

  footer { padding: 3rem 0 3.5rem; color: var(--muted); font-size: .9rem; }
  footer .row { display: flex; flex-wrap: wrap; gap: 1rem 2.5rem; align-items: baseline; }
  footer a { color: var(--muted); border-bottom-color: var(--rule); } footer a:hover { color: var(--cream); }

  @media (max-width: 900px) {
    .hero { grid-template-columns: 1fr; gap: 2.4rem; padding: 4rem 0 3.5rem; }
    .hero aside { border-left: 0; padding-left: 0; border-top: 1px solid var(--rule); padding-top: 1.6rem; }
    .sec { grid-template-columns: 1fr; gap: .8rem; }
    .who-grid, .takes, .policy { grid-template-columns: 1fr; }
    .policy > div + div { border-left: 0; border-top: 1px solid var(--rule); }
    nav { flex-wrap: wrap; gap: .6rem 1rem; padding: .7rem 0; }
    nav .brand { white-space: nowrap; font-size: 1.15rem; }
    nav ul { width: 100%; margin-left: 0; gap: 1.1rem; align-items: center; flex-wrap: wrap; }
    nav ul a { font-size: .86rem; } nav ul li:last-child { margin-left: auto; } nav ul a.go { padding: .4rem .7rem; font-size: .84rem; }
    nav ul a.on::after { bottom: -.35rem; }
    .roster td.model { white-space: normal; }
  }
.study{border:1px solid rgba(237,230,214,.15);padding:1.2rem 1.4rem;margin:1rem 0;border-radius:6px}.study .tier{font-family:var(--mono);font-size:.8rem;color:var(--cyan);text-transform:uppercase}.study .metrics{display:flex;gap:1.4rem;flex-wrap:wrap;margin:.6rem 0}.study .m b{display:block;font-size:1.4rem}.study .m small{color:rgba(237,230,214,.6)}.study .panel{font-size:.9rem;color:rgba(237,230,214,.7)}

  /* two pillars */
  .pillars { display: grid; grid-template-columns: 1fr 1fr; margin-top: 2.2rem; border: 1px solid var(--rule); border-radius: 8px; overflow: hidden; }
  .pillars > div { padding: 1.8rem 2rem; }
  .pillars > div + div { border-left: 1px solid var(--rule); }
  .pillars .k { font-family: var(--mono); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: var(--cyan); margin-bottom: .6rem; }
  .pillars h3 { font-size: 1.5rem; margin-bottom: .6rem; }
  .pillars p { color: var(--cream-2); font-size: .97rem; }
  .pillars ul { list-style: none; padding: 0; margin-top: 1rem; display: grid; gap: .45rem; }
  .pillars li { position: relative; padding-left: 1.3rem; font-size: .95rem; color: var(--cream); }
  .pillars li::before { content: "—"; position: absolute; left: 0; color: var(--cyan); }
  .pillars li small { color: var(--muted); }
  .pillars .more { margin-top: 1.2rem; font-size: .92rem; }
  /* lifecycle strip */
  .life { margin-top: 2.2rem; border: 1px solid var(--rule); border-radius: 8px; background: var(--ink-2); font-family: var(--mono); font-size: .84rem; overflow-x: auto; }
  .life ol { list-style: none; padding: .9rem 1.1rem 1rem; display: grid; gap: .5rem; min-width: 38rem; }
  .life li { display: grid; grid-template-columns: 2.2rem 8.4rem 1fr; gap: 1rem; align-items: baseline; }
  .life .n { color: var(--muted); font-size: .76rem; }
  .life .st { color: var(--cream); font-weight: 500; }
  .life .msg { color: var(--cream-2); }
  .life li.you .st { color: var(--cyan); }
  .life li.you .msg { color: var(--cream); }
  .life li.you .st::before { content: "◆ "; color: var(--cyan); }
  /* the case for automation: four things + spec-as-built */
  .afford { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; margin-top: 2.2rem; }
  .afford > div { border: 1px solid var(--rule); border-radius: 8px; padding: 1.5rem 1.7rem; }
  .afford .k { font-family: var(--mono); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: var(--cyan); margin-bottom: .6rem; }
  .afford h3 { font-size: 1.32rem; margin-bottom: .55rem; line-height: 1.25; }
  .afford p { color: var(--cream-2); font-size: .95rem; }
  .spec { margin-top: 1.4rem; border: 1px solid var(--rule); border-radius: 8px; overflow: hidden; }
  .spec > div { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
  .spec > div + div { border-top: 1px solid var(--rule); }
  .spec .ask { padding: 1.4rem 1.6rem; background: rgba(237,230,214,.03); border-right: 1px solid var(--rule); }
  .spec .ask .k { font-family: var(--mono); font-size: .7rem; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); margin-bottom: .5rem; }
  .spec .ask p { font-family: var(--serif); font-size: 1.15rem; color: var(--cream); line-height: 1.4; }
  .spec .built { padding: 1.4rem 1.6rem; font-size: .95rem; color: var(--cream-2); }
  .spec .built b { color: var(--cream); font-weight: 500; display: block; margin-bottom: .3rem; font-family: var(--serif); font-size: 1.12rem; }
  .spec .head > div { padding: .6rem 1.6rem; font-family: var(--mono); font-size: .7rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); background: transparent; }
  .spec .head .ask { color: var(--muted); }
  .spec .head .built { color: var(--cyan); }
  .three { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 2.4rem; border: 1px solid var(--rule); border-radius: 8px; overflow: hidden; background: var(--ink-2); }
  .three > div { padding: 1.6rem 1.7rem; }
  .three > div + div { border-left: 1px solid var(--rule); }
  .three .k { font-family: var(--mono); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: var(--cyan); margin-bottom: .6rem; }
  .three h3 { font-size: 1.4rem; margin-bottom: .5rem; line-height: 1.2; }
  .three p { color: var(--cream-2); font-size: .94rem; }
  h3.arg { font-size: 1.7rem; margin-top: 3.4rem; line-height: 1.2; max-width: 30ch; }
  h3.arg span { display: block; font-family: var(--mono); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: var(--cyan); margin-bottom: .6rem; }
  .argp { margin-top: .8rem; max-width: 42rem; color: var(--cream-2); font-size: 1.02rem; }
  .argp + .afford { margin-top: 1.6rem; }
  .scope { display: grid; grid-template-columns: 1fr 1fr; margin-top: 1.6rem; border: 1px solid var(--rule); border-radius: 8px; overflow: hidden; }
  .scope > div { padding: 1.5rem 1.7rem; }
  .scope > div + div { border-left: 1px solid var(--rule); }
  .scope .k { font-family: var(--mono); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: var(--cyan); margin-bottom: .8rem; }
  .scope .stays .k { color: var(--muted); }
  .scope ul { list-style: none; padding: 0; display: grid; gap: .6rem; }
  .scope li { position: relative; padding-left: 1.3rem; font-size: .95rem; color: var(--cream-2); }
  .scope li b { color: var(--cream); font-weight: 500; }
  .scope li::before { content: "◆"; position: absolute; left: 0; color: var(--cyan); font-size: .7rem; top: .35rem; }
  .scope .stays li::before { content: "△"; color: var(--muted); }
  .note.tail { max-width: none; background: rgba(95,211,230,.04); }
  .note.tail p { font-family: var(--serif); font-size: 1.15rem; line-height: 1.5; color: var(--cream); }
  @media (max-width: 900px) { .three, .scope { grid-template-columns: 1fr; } .three > div + div, .scope > div + div { border-left: 0; border-top: 1px solid var(--rule); } }
  @media (max-width: 900px) { .afford, .spec > div { grid-template-columns: 1fr; } .spec .ask { border-right: 0; border-bottom: 1px solid var(--rule); } .spec .head { display: none; } }
  @media (max-width: 900px) { .pillars { grid-template-columns: 1fr; } .pillars > div + div { border-left: 0; border-top: 1px solid var(--rule); } }

  /* nav: current page */
  nav ul a.on { color: var(--cream); position: relative; }
  nav ul a.on::after { content: ""; position: absolute; left: 0; right: 0; bottom: -.55rem; height: 1px; background: var(--cyan); }
  /* pillar page header */
  .pagehead { padding: 5rem 0 3.5rem; border-bottom: 1px solid var(--rule); display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 4rem; align-items: end; }
  .pagehead .k { font-family: var(--mono); font-size: .74rem; letter-spacing: .14em; text-transform: uppercase; color: var(--cyan); margin-bottom: 1rem; }
  .pagehead h1 { font-size: clamp(2.2rem, 4.4vw, 3.6rem); line-height: 1.08; font-weight: 300; max-width: 16ch; }
  .pagehead p { font-size: 1.1rem; max-width: 34rem; margin-top: 1.4rem; color: var(--cream-2); }
  .pagehead aside { border-left: 1px solid var(--rule); padding-left: 2rem; font-size: .95rem; color: var(--muted); }
  .pagehead aside .k { margin-bottom: .8rem; }
  .pagehead aside ul { list-style: none; padding: 0; display: grid; gap: .5rem; }
  .pagehead aside li { position: relative; padding-left: 1.3rem; }
  .pagehead aside li::before { content: "—"; position: absolute; left: 0; color: var(--cyan); }
  .pagehead aside li a { color: var(--cream-2); border-bottom-color: var(--rule); } .pagehead aside li a:hover { color: var(--cream); }
  .pagehead .cta { display: flex; gap: 1.6rem; align-items: center; margin-top: 2rem; }
  /* hub: the two pillars, equal weight */
  .pillars .go { display: inline-block; margin-top: 1.4rem; background: var(--cream); color: var(--ink); padding: .6rem 1rem; border-radius: 6px; font-weight: 500; border: 0; font-size: .95rem; }
  .pillars .go:hover { background: #fff; }
  .pillars > div { display: flex; flex-direction: column; }
  .pillars .more { margin-top: auto; padding-top: 1.2rem; }
  /* cross-link strip at the foot of a pillar page */
  .crossover { margin-top: 2.4rem; border: 1px solid var(--rule); border-radius: 8px; padding: 1.6rem 1.8rem; display: flex; flex-wrap: wrap; gap: 1rem 2rem; align-items: baseline; justify-content: space-between; }
  .crossover h3 { font-size: 1.35rem; }
  .crossover p { color: var(--muted); font-size: .95rem; max-width: 34rem; }
  @media (max-width: 900px) { .pagehead { grid-template-columns: 1fr; gap: 2rem; padding: 3.5rem 0 3rem; } .pagehead aside { border-left: 0; padding-left: 0; border-top: 1px solid var(--rule); padding-top: 1.4rem; } }