/* ============================================================
   2BP — Two-Body Problem · shared identity system
   ============================================================ */
:root{
  --ground:#0A0B12;
  --ground-2:#0E1019;
  --ground-3:#11131f;
  --ink-line:rgba(255,255,255,0.06);
  --warm:#E89B4C;        /* the alive body — amber/copper */
  --warm-glow:#F4B873;
  --cool:#5FA8A2;        /* the pushing-back body — cold teal */
  --cool-glow:#84C7C0;
  --bary:#EDE4CF;        /* the barycentre — residue, neither colour */
  --text:#E7E3D8;
  --text-dim:#9A968B;
  --text-faint:#5C5A52;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--ground);
  color:var(--text);
  font-family:'Fraunces',Georgia,serif;
  font-weight:300;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
::selection{background:rgba(232,155,76,0.25);color:#fff}

/* instrument grid + grain */
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:1;
  background-image:linear-gradient(var(--ink-line) 1px,transparent 1px),
                   linear-gradient(90deg,var(--ink-line) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse 90% 80% at 50% 30%,#000 20%,transparent 100%);
  -webkit-mask-image:radial-gradient(ellipse 90% 80% at 50% 30%,#000 20%,transparent 100%);
}
body::after{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:2;opacity:0.035;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.mono{font-family:'IBM Plex Mono',monospace;font-weight:400}
.wrap{max-width:1040px;margin:0 auto;padding:0 32px;position:relative;z-index:3}
.wrap.narrow{max-width:820px}

/* ---- top bar ---- */
.topbar{position:fixed;top:0;left:0;right:0;z-index:40;
  display:flex;justify-content:space-between;align-items:center;
  padding:18px 32px;
  background:linear-gradient(180deg,rgba(10,11,18,0.86),rgba(10,11,18,0));
  backdrop-filter:blur(2px);-webkit-backdrop-filter:blur(2px);}
.topbar .mk{font-family:'IBM Plex Mono',monospace;font-weight:600;font-size:18px;
  letter-spacing:0.04em;color:var(--text);text-decoration:none;display:inline-flex;align-items:center;gap:12px}
.topbar .mk .b{color:var(--warm)}
.topbar .mk .p{color:var(--cool)}
.topbar .mk .back{font-weight:400;font-size:11px;letter-spacing:0.18em;text-transform:uppercase;color:var(--text-faint)}
.topbar nav{display:flex;gap:22px}
.topbar nav a{font-family:'IBM Plex Mono',monospace;font-size:11px;font-weight:400;
  letter-spacing:0.18em;text-transform:uppercase;color:var(--text-faint);
  text-decoration:none;transition:color .25s}
.topbar nav a:hover{color:var(--warm)}
.topbar nav a.on{color:var(--text)}
@media(max-width:680px){.topbar nav{display:none}}

/* ---- telemetry labels ---- */
.tag{font-family:'IBM Plex Mono',monospace;font-size:11px;font-weight:400;
  letter-spacing:0.22em;text-transform:uppercase;color:var(--text-faint);}
.tag .dot{display:inline-block;width:5px;height:5px;border-radius:50%;
  background:var(--warm);margin-right:9px;vertical-align:middle;
  box-shadow:0 0 8px var(--warm-glow);}

/* ---- reveal ---- */
.rv{opacity:0;transform:translateY(22px);transition:opacity .9s cubic-bezier(.2,.7,.2,1),transform .9s cubic-bezier(.2,.7,.2,1)}
.rv.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}
  .system{animation:none!important}.bary{animation:none!important}}

/* ============================================================
   ORBIT MARK
   ============================================================ */
.stage{width:360px;height:360px;position:relative;margin-bottom:8px}
@media(max-width:520px){.stage{width:266px;height:266px}}
.orbit{position:absolute;inset:0;border:1px solid rgba(237,228,207,0.12);border-radius:50%}
.orbit.r2{inset:66px;border-color:rgba(237,228,207,0.07)}
.system{position:absolute;inset:0;animation:spin 20s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.bary{position:absolute;left:calc(50% - 16px);top:calc(50% - 16px);
  width:32px;height:32px;border-radius:50%;
  background:radial-gradient(circle,var(--bary) 0%,rgba(237,228,207,0.25) 40%,transparent 70%);
  transform:translate(-22px,0);animation:barypulse 6s ease-in-out infinite}
@keyframes barypulse{0%,100%{opacity:0.5}50%{opacity:1}}
.bary::after{content:"";position:absolute;left:50%;top:50%;width:4px;height:4px;
  border-radius:50%;background:var(--bary);transform:translate(-50%,-50%);box-shadow:0 0 14px var(--bary)}
.body{position:absolute;border-radius:50%;top:50%}
.body.warm{width:48px;height:48px;left:50%;margin-top:-24px;margin-left:36px;
  background:radial-gradient(circle at 35% 30%,var(--warm-glow),var(--warm) 55%,#9a5a23 100%);
  box-shadow:0 0 40px -2px var(--warm-glow),0 0 90px -10px var(--warm)}
.body.cool{width:30px;height:30px;right:50%;margin-top:-15px;margin-right:124px;
  background:radial-gradient(circle at 35% 30%,var(--cool-glow),var(--cool) 55%,#2c5b57 100%);
  box-shadow:0 0 32px -2px var(--cool-glow),0 0 68px -12px var(--cool)}

/* ============================================================
   HERO
   ============================================================ */
.hero{min-height:100vh;display:flex;flex-direction:column;justify-content:center;
  align-items:center;text-align:center;padding:120px 32px 90px;position:relative}
.lockup{font-family:'IBM Plex Mono',monospace;font-weight:500;
  font-size:clamp(54px,12vw,116px);letter-spacing:0.02em;line-height:1;color:var(--text);margin-top:10px}
.lockup .b{color:var(--warm)}
.lockup .p{color:var(--cool)}
.fullname{font-family:'Fraunces',serif;font-weight:400;font-style:italic;
  font-size:clamp(19px,3.8vw,28px);color:var(--text-dim);margin-top:18px;letter-spacing:0.01em}
.tagline{font-family:'IBM Plex Mono',monospace;font-size:12px;letter-spacing:0.26em;
  text-transform:uppercase;color:var(--text-faint);margin-top:28px}
.herosig{font-family:'Fraunces',serif;font-style:italic;font-size:15px;color:var(--text-dim);margin-top:16px}
.herosig b{font-style:normal;font-weight:400;color:var(--text)}
.herosig a{text-decoration:none;border-bottom:1px solid var(--ink-line);transition:border-color .25s}
.herosig a:hover{border-color:var(--warm)}
.herosig a:hover b{color:var(--warm)}
.heroplain{max-width:600px;margin:20px auto 0;font-family:'Fraunces',serif;font-size:17px;
  line-height:1.55;color:var(--text-dim)}
.heroplain b{color:var(--text);font-weight:400}
@media(max-width:640px){.heroplain{font-size:15px}}

/* latest instance teaser band */
.latest-wrap{display:flex;justify-content:center;padding:0 28px 56px;margin-top:-18px}
.latest-strip{display:flex;align-items:center;gap:16px;max-width:720px;width:100%;
  padding:14px 22px;border:1px solid var(--ink-line);border-radius:8px;
  background:rgba(237,228,207,0.02);text-decoration:none;
  font-family:'IBM Plex Mono',monospace;transition:border-color .25s,background .25s;flex-wrap:wrap}
.latest-strip:hover{border-color:var(--warm);background:rgba(232,155,76,0.045)}
.latest-strip .ls-k{font-size:10px;letter-spacing:0.2em;color:var(--text-faint);text-transform:uppercase}
.latest-strip .ls-n{font-size:13px;color:var(--warm);font-weight:600}
.latest-strip .ls-t{font-size:13.5px;color:var(--text-dim);font-family:'Fraunces',serif;font-style:italic}
.latest-strip .ls-go{font-size:11px;letter-spacing:0.15em;color:var(--text-faint);
  text-transform:uppercase;margin-left:auto;transition:color .25s}
.latest-strip:hover .ls-go{color:var(--warm-glow)}
@media(max-width:640px){.latest-strip .ls-go{margin-left:0}}

/* plain-language name gloss */
.namegloss{font-family:'Fraunces',serif;font-style:italic;font-size:15.5px;line-height:1.55;
  color:var(--text-dim);margin:16px 0 4px;padding-left:18px;border-left:2px solid var(--ink-line);max-width:680px}
.scrollcue{position:absolute;bottom:34px;left:50%;transform:translateX(-50%);
  font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:0.3em;
  text-transform:uppercase;color:var(--text-faint);opacity:.7;animation:bob 2.6s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateX(-50%) translateY(0);opacity:.5}50%{transform:translateX(-50%) translateY(6px);opacity:.9}}

/* ============================================================
   SECTIONS / TYPE
   ============================================================ */
section{padding:104px 0;border-top:1px solid var(--ink-line);position:relative}
.lede{font-size:clamp(25px,4.1vw,40px);font-weight:300;line-height:1.3;max-width:780px;margin:22px 0 0;color:var(--text)}
.lede em{font-style:italic;color:var(--warm)}
.body-copy{font-size:17.5px;line-height:1.66;color:var(--text-dim);max-width:640px;margin-top:26px}
.body-copy strong{color:var(--text);font-weight:500}
.body-copy + .body-copy{margin-top:18px}
.twocol{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;margin-top:50px}
@media(max-width:760px){.twocol{grid-template-columns:1fr;gap:38px}}
.diagram{aspect-ratio:1;width:100%;max-width:380px;margin:0 auto;position:relative}

/* wager pullquote */
.wager{max-width:820px;margin-top:30px;font-family:'Fraunces',serif;font-style:italic;
  font-weight:300;font-size:clamp(22px,3.2vw,30px);line-height:1.4;color:var(--text)}
.wager b{font-style:normal;font-weight:500;color:var(--warm-glow)}
.wager-lead{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:0.24em;
  text-transform:uppercase;color:var(--text-faint);margin-top:36px;display:flex;align-items:center;gap:14px}
.wager-lead::after{content:"";flex:0 0 34px;height:1px;background:var(--ink-line)}
.wager-lead + .wager{margin-top:14px}
.wager.stanza .line{display:block}
.wager.stanza .line + .line{margin-top:10px}
.wager.stanza .neg{font-size:0.78em;line-height:1.45;color:var(--text-dim)}

/* three claims */
.claims{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:52px}
@media(max-width:820px){.claims{grid-template-columns:1fr}}
.claim{border:1px solid var(--ink-line);border-radius:6px;padding:30px 26px 32px;
  background:linear-gradient(165deg,var(--ground-2),var(--ground));position:relative;overflow:hidden}
.claim .ci{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:0.2em;color:var(--text-faint)}
.claim h3{font-family:'Fraunces',serif;font-weight:400;font-size:21px;margin-top:16px;color:var(--text);line-height:1.25}
.claim p{font-size:15px;line-height:1.6;color:var(--text-dim);margin-top:13px}
.claim .edge{position:absolute;left:0;top:0;bottom:0;width:2px}
.claim.c1 .edge{background:linear-gradient(var(--warm),transparent)}
.claim.c2 .edge{background:linear-gradient(var(--cool),transparent)}
.claim.c3 .edge{background:linear-gradient(var(--bary),transparent)}

/* four beats / constants */
.beats-form{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:50px}
@media(max-width:820px){.beats-form{grid-template-columns:repeat(2,1fr)}}
@media(max-width:460px){.beats-form{grid-template-columns:1fr}}
.bf{border:1px solid var(--ink-line);border-radius:5px;padding:24px 20px;background:var(--ground-2)}
.bf .n{font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--warm);letter-spacing:0.18em}
.bf h4{font-family:'Fraunces',serif;font-weight:400;font-size:18px;margin-top:14px;color:var(--text)}
.bf p{font-size:14px;line-height:1.55;color:var(--text-dim);margin-top:9px}

/* spine / invariants */
.spine{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:48px}
@media(max-width:680px){.spine{grid-template-columns:1fr}}
.inv{border:1px solid var(--ink-line);border-radius:6px;padding:26px 26px 28px;background:var(--ground-2);
  display:flex;gap:20px;align-items:flex-start}
.inv .gl{flex-shrink:0;width:12px;height:12px;border-radius:50%;margin-top:6px;
  background:var(--warm);box-shadow:0 0 16px var(--warm-glow)}
.inv:nth-child(2) .gl{background:var(--cool);box-shadow:0 0 16px var(--cool-glow)}
.inv:nth-child(3) .gl{background:var(--warm);box-shadow:0 0 16px var(--warm-glow)}
.inv:nth-child(4) .gl{background:var(--bary);box-shadow:0 0 16px var(--bary)}
.inv h4{font-family:'Fraunces',serif;font-weight:400;font-size:20px;color:var(--text)}
.inv h4 span{font-style:italic;color:var(--text-faint);font-size:15px;margin-left:6px}
.inv p{font-size:14.5px;line-height:1.58;color:var(--text-dim);margin-top:10px}

/* ============================================================
   INSTANCE CARDS / TILES
   ============================================================ */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:50px}
@media(max-width:820px){.cards{grid-template-columns:1fr}}
.card{border:1px solid var(--ink-line);border-radius:7px;
  background:linear-gradient(160deg,var(--ground-2),var(--ground));
  padding:28px 26px 30px;position:relative;overflow:hidden;transition:border-color .3s,transform .3s;display:block}
.card:hover{border-color:rgba(232,155,76,0.3);transform:translateY(-3px)}
a.card{text-decoration:none;color:inherit}
.card .num{font-family:'IBM Plex Mono',monospace;font-weight:600;font-size:50px;color:var(--text);line-height:1}
.card .num .pt{color:var(--warm)}
.card .status{position:absolute;top:30px;right:26px;font-family:'IBM Plex Mono',monospace;
  font-size:9.5px;letter-spacing:0.18em;text-transform:uppercase;color:var(--text-faint);
  border:1px solid var(--ink-line);border-radius:20px;padding:5px 11px}
.card .status.live{color:var(--warm);border-color:rgba(232,155,76,0.35)}
.card .title{font-family:'Fraunces',serif;font-style:italic;font-weight:300;font-size:17px;
  color:var(--text-dim);margin-top:16px;line-height:1.35}
.card .beats{margin-top:24px;display:flex;flex-direction:column;gap:14px}
.beat .k{font-family:'IBM Plex Mono',monospace;font-size:9.5px;letter-spacing:0.2em;
  text-transform:uppercase;color:var(--text-faint)}
.beat .v{font-family:'Fraunces',serif;font-size:16px;color:var(--text);margin-top:4px;font-weight:300;line-height:1.35}
.beat .v.self{font-style:italic;color:var(--cool-glow)}
.card .spark{position:absolute;right:-30px;top:-30px;width:96px;height:96px;border-radius:50%;
  background:radial-gradient(circle,var(--warm) 0%,transparent 70%);opacity:0.14;pointer-events:none}
.card .read{margin-top:24px;font-family:'IBM Plex Mono',monospace;font-size:10.5px;
  letter-spacing:0.18em;text-transform:uppercase;color:var(--warm);
  display:inline-flex;gap:9px;align-items:center;transition:gap .25s,color .25s}
a.card:hover .read{color:var(--warm-glow);gap:14px}
.archive-note{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:0.14em;
  color:var(--text-faint);margin-top:30px;text-align:center;text-transform:uppercase}

/* gateway button row */
.gateway{display:flex;justify-content:center;margin-top:46px}
.btn{font-family:'IBM Plex Mono',monospace;font-size:12px;letter-spacing:0.16em;text-transform:uppercase;
  text-decoration:none;padding:16px 30px;border-radius:5px;transition:all .25s;display:inline-flex;gap:10px;align-items:center}
.btn.solid{background:var(--warm);color:#1a1206;font-weight:500}
.btn.solid:hover{background:var(--warm-glow);box-shadow:0 0 34px -6px var(--warm)}
.btn.ghost{border:1px solid var(--ink-line);color:var(--text-dim)}
.btn.ghost:hover{border-color:var(--cool);color:var(--cool-glow)}

/* ============================================================
   INVITATION
   ============================================================ */
.invite{margin-top:48px;border:1px solid var(--ink-line);border-radius:8px;overflow:hidden;
  background:radial-gradient(ellipse 70% 130% at 80% 40%,rgba(232,155,76,0.10),transparent 60%),
             radial-gradient(ellipse 60% 120% at 12% 80%,rgba(95,168,162,0.08),transparent 60%),var(--ground-2);
  padding:56px 50px}
@media(max-width:680px){.invite{padding:40px 28px}}
.invite h3{font-family:'Fraunces',serif;font-weight:300;font-size:clamp(22px,3.4vw,30px);
  line-height:1.32;color:var(--text);max-width:640px}
.invite h3 em{font-style:italic;color:var(--warm)}
.invite p{font-size:16px;line-height:1.62;color:var(--text-dim);max-width:600px;margin-top:20px}
.cta-row{display:flex;gap:16px;flex-wrap:wrap;margin-top:34px}
.cta{font-family:'IBM Plex Mono',monospace;font-size:12px;letter-spacing:0.16em;text-transform:uppercase;
  text-decoration:none;padding:15px 26px;border-radius:5px;transition:all .25s}
.cta.solid{background:var(--warm);color:#1a1206;font-weight:500}
.cta.solid:hover{background:var(--warm-glow);box-shadow:0 0 30px -6px var(--warm)}
.cta.ghost{border:1px solid var(--ink-line);color:var(--text-dim)}
.cta.ghost:hover{border-color:var(--cool);color:var(--cool-glow)}

/* ============================================================
   LIBRARY PAGE
   ============================================================ */
.libhead{padding:160px 0 60px;text-align:center}
.libhead .lockup{font-size:clamp(40px,8vw,72px)}
.libhead .sub{font-family:'Fraunces',serif;font-style:italic;font-size:clamp(18px,3vw,24px);
  color:var(--text-dim);margin-top:18px;max-width:620px;margin-left:auto;margin-right:auto;line-height:1.4}
.libgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;padding:30px 0 40px}
@media(max-width:820px){.libgrid{grid-template-columns:1fr}}
.libnote{text-align:center;padding:0 0 120px}

/* ============================================================
   INSTANCE DETAIL PAGE
   ============================================================ */
.ihero{padding:160px 0 70px;position:relative}
.ihero .idx{font-family:'IBM Plex Mono',monospace;font-weight:600;font-size:clamp(64px,16vw,140px);
  color:var(--text);line-height:.9}
.ihero .idx .pt{color:var(--warm)}
.ihero .istatus{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:0.2em;text-transform:uppercase;
  color:var(--warm);border:1px solid rgba(232,155,76,0.35);border-radius:20px;padding:6px 14px;display:inline-block;margin-bottom:24px}
.ihero .istatus.soft{color:var(--text-faint);border-color:var(--ink-line)}
.ihero h1{font-family:'Fraunces',serif;font-weight:300;font-size:clamp(30px,5vw,52px);
  line-height:1.16;color:var(--text);margin-top:26px;max-width:860px}
.ihero h1 em{font-style:italic;color:var(--warm)}
.ihero .meta{font-family:'IBM Plex Mono',monospace;font-size:12.5px;letter-spacing:0.12em;
  color:var(--text-dim);margin-top:28px;display:flex;gap:22px;flex-wrap:wrap}
.ihero .meta .warm{color:var(--warm)}
.ihero .meta .cool{color:var(--cool-glow);font-style:normal}

.isection{padding:70px 0;border-top:1px solid var(--ink-line)}
.isection .tag{margin-bottom:30px;display:block}
.isection h2{font-family:'Fraunces',serif;font-weight:300;font-size:clamp(22px,3.4vw,30px);color:var(--text);max-width:720px;line-height:1.3}

/* constants grid (detail) */
.constants{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:680px){.constants{grid-template-columns:1fr}}
.const{border:1px solid var(--ink-line);border-radius:6px;padding:28px 28px 30px;background:var(--ground-2);position:relative;overflow:hidden}
.const .k{font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:0.2em;text-transform:uppercase;color:var(--text-faint)}
.const .v{font-family:'Fraunces',serif;font-weight:300;font-size:21px;color:var(--text);margin-top:14px;line-height:1.34}
.const .v.self{font-style:italic;color:var(--cool-glow)}
.const .edge{position:absolute;left:0;top:0;bottom:0;width:2px;background:linear-gradient(var(--warm),transparent)}
.const:nth-child(2) .edge{background:linear-gradient(var(--cool),transparent)}
.const:nth-child(3) .edge{background:linear-gradient(var(--warm-glow),transparent)}
.const:nth-child(4) .edge{background:linear-gradient(var(--bary),transparent)}

/* video / discussion placeholder */
.media{margin-top:6px;border:1px solid var(--ink-line);border-radius:10px;overflow:hidden;
  aspect-ratio:16/9;position:relative;
  background:radial-gradient(ellipse 60% 80% at 50% 45%,rgba(232,155,76,0.08),transparent 70%),var(--ground-2);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px}
.media .play{width:74px;height:74px;border-radius:50%;border:1px solid rgba(237,228,207,0.25);
  display:flex;align-items:center;justify-content:center;position:relative}
.media .play::after{content:"";border-style:solid;border-width:11px 0 11px 18px;
  border-color:transparent transparent transparent var(--warm);margin-left:5px;filter:drop-shadow(0 0 10px var(--warm))}
.media .ph-label{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:0.24em;text-transform:uppercase;color:var(--text-faint)}
.media iframe{width:100%;height:100%;border:0;position:absolute;inset:0}

/* reticle (the artefact) */
.reticle{border:1px solid var(--ink-line);border-radius:10px;overflow:hidden;
  background:radial-gradient(ellipse 70% 120% at 82% 40%,rgba(232,155,76,0.10),transparent 60%),var(--ground-2);
  padding:40px 40px 42px;display:flex;justify-content:space-between;align-items:center;gap:34px}
@media(max-width:680px){.reticle{flex-direction:column;align-items:flex-start;padding:32px 26px}}
.reticle .rk{font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:0.2em;text-transform:uppercase;color:var(--text-faint)}
.reticle .rt{font-family:'Fraunces',serif;font-style:italic;font-weight:300;font-size:23px;color:var(--text);margin-top:12px;line-height:1.32;max-width:560px}
.reticle .rmeta{font-family:'IBM Plex Mono',monospace;font-size:11.5px;letter-spacing:0.1em;color:var(--text-dim);margin-top:16px}
.reticle .others{margin-top:20px;font-size:14.5px;color:var(--text-dim);line-height:1.5;max-width:560px}
.reticle .others b{color:var(--text);font-weight:500}

/* references */
.refs{list-style:none;margin-top:6px;border-top:1px solid var(--ink-line)}
.refs li{padding:18px 2px;border-bottom:1px solid var(--ink-line);display:flex;gap:22px;align-items:baseline}
.refs li .rn{font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--warm);flex-shrink:0;width:34px}
.refs li .rd{font-size:15.5px;line-height:1.5;color:var(--text-dim)}
.refs li .rd a{color:var(--text);text-decoration:none;border-bottom:1px solid var(--ink-line)}
.refs li .rd a:hover{color:var(--warm)}
.refs li .rd .src{font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--text-faint);letter-spacing:0.08em;display:block;margin-top:4px}

/* prev/next nav */
.instnav{display:flex;justify-content:space-between;gap:18px;padding:60px 0 0}
.instnav a{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:0.16em;text-transform:uppercase;
  color:var(--text-dim);text-decoration:none;transition:color .25s}
.instnav a:hover{color:var(--warm)}
.instnav a.disabled{color:var(--text-faint);opacity:.4;pointer-events:none}

/* ============================================================
   FOOTER
   ============================================================ */
footer{padding:80px 0 100px;border-top:1px solid var(--ink-line);text-align:center}
footer .mk{font-family:'IBM Plex Mono',monospace;font-weight:600;font-size:30px;color:var(--text)}
footer .mk .b{color:var(--warm)}
footer .mk .p{color:var(--cool)}
footer .note{font-family:'Fraunces',serif;font-style:italic;color:var(--text-dim);font-size:16.5px;
  max-width:620px;margin:24px auto 0;line-height:1.6}
footer .meta{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:0.18em;
  text-transform:uppercase;color:var(--text-faint);margin-top:40px}
footer .meta a{color:var(--text-faint);text-decoration:none;border-bottom:1px solid var(--ink-line)}
footer .meta a:hover{color:var(--warm)}