/* separatrix.ai — shared stylesheet.
   Loaded by every page: the site pages built by build.py and the commitment
   pages built by clai's bin/separatrix-publish. One source of truth for the
   look. Asset paths are absolute because the site is served at the domain
   root, so pages at any depth link the same stylesheet. */

@font-face{
  font-family:'Fraunces';
  src:url('/fonts/fraunces-latin.woff2') format('woff2');
  font-weight:100 900;font-style:normal;font-display:swap;
}
@font-face{
  font-family:'Source Serif 4';
  src:url('/fonts/source-serif-4-latin.woff2') format('woff2');
  font-weight:200 900;font-style:normal;font-display:swap;
}
@font-face{
  font-family:'Source Serif 4';
  src:url('/fonts/source-serif-4-italic-latin.woff2') format('woff2');
  font-weight:200 900;font-style:italic;font-display:swap;
}

:root{
  --paper:#faf6ef;
  --paper-2:#f3ead9;
  --card:#fffdf9;
  --card-2:#fdf9f1;
  --ink:#2e2823;
  --ink-soft:#4c4239;
  --mute:#867a6b;
  --line:#e7dcc9;
  --line-soft:#f0e7d8;
  --water:#33718c;     /* the cooperative basin */
  --contour:#b06a41;   /* the adversarial basin */
  --water-bright:#0f8fd0;    /* the S trajectories: saturated versions */
  --contour-bright:#f07f22;
  --shadow:24px -18px 40px -28px rgba(74,52,30,.45);
  --art:multiply;
  --art-op:.5;
  --art-filter:none;

  --display:'Fraunces',Charter,Georgia,serif;
  --body:'Source Serif 4',Charter,'Bitstream Charter',Cambria,Georgia,serif;
  --label:ui-sans-serif,-apple-system,'Segoe UI',Inter,'Helvetica Neue',sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{
    --paper:#17140f;
    --paper-2:#201b14;
    --card:#211c15;
    --card-2:#262019;
    --ink:#ede5d7;
    --ink-soft:#d5cab8;
    --mute:#9c9182;
    --line:#332c23;
    --line-soft:#2a251d;
    --water:#7fb5cd;
    --contour:#dd9a6c;
    --water-bright:#54c3ff;
    --contour-bright:#ffa14e;
    --shadow:24px -18px 40px -28px rgba(0,0,0,.7);
    --art:screen;
    --art-op:.26;
    --art-filter:invert(1) hue-rotate(175deg) saturate(.85);
  }
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--body);
  font-size:1.09rem;line-height:1.72;
  font-optical-sizing:auto;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
  overflow-x:hidden;
}
/* the page's own warm wash, under everything */
body::before{
  content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(120% 80% at 12% -10%, var(--paper-2) 0%, transparent 60%),
    radial-gradient(90% 70% at 105% 8%, color-mix(in oklab, var(--water) 9%, transparent) 0%, transparent 55%),
    radial-gradient(80% 60% at -10% 95%, color-mix(in oklab, var(--contour) 8%, transparent) 0%, transparent 55%);
}
/* the generated watercolour plate, floated at the top of every page */
body::after{
  content:"";position:absolute;top:0;left:0;right:0;height:min(78vh,900px);
  z-index:-1;pointer-events:none;
  background:url('/assets/art/hero.jpg') center top / cover no-repeat;
  mix-blend-mode:var(--art);opacity:var(--art-op);filter:var(--art-filter);
  -webkit-mask-image:linear-gradient(to bottom, rgba(0,0,0,.85) 0%, rgba(0,0,0,.5) 45%, transparent 100%);
  mask-image:linear-gradient(to bottom, rgba(0,0,0,.85) 0%, rgba(0,0,0,.5) 45%, transparent 100%);
}

/* Text-heavy pages keep the wash as an atmosphere, not a competitor. */
body.reading::after{
  height:min(42vh,520px);
  opacity:calc(var(--art-op) * .5);
}

a{color:inherit;text-decoration:underline;text-decoration-thickness:1px;
  text-decoration-color:color-mix(in oklab, var(--water) 45%, transparent);
  text-underline-offset:3px;transition:color .15s,text-decoration-color .15s}
a:hover{color:var(--water);text-decoration-color:var(--water)}
::selection{background:color-mix(in oklab, var(--water) 26%, transparent)}
:focus-visible{outline:2px solid var(--contour);outline-offset:3px;border-radius:4px}

/* ---------------------------------------------------------------- nav ---- */
.nav{
  position:sticky;top:0;z-index:50;
  padding:clamp(.5rem,1.6vw,1rem) clamp(.6rem,3vw,1.4rem) 0;
}
.nav-inner{
  max-width:64rem;margin:0 auto;
  display:flex;align-items:center;gap:.7rem 1rem;flex-wrap:wrap;
  padding:.5rem .6rem .5rem .55rem;
  background:color-mix(in oklab, var(--card) 78%, transparent);
  border:1px solid var(--line);
  border-radius:999px;
  box-shadow:0 1px 2px rgba(74,52,30,.04), 0 14px 34px -26px rgba(74,52,30,.5);
  backdrop-filter:blur(14px) saturate(1.15);
  -webkit-backdrop-filter:blur(14px) saturate(1.15);
}
.brand{
  font-family:var(--display);font-weight:600;font-size:1.05rem;
  letter-spacing:.005em;text-decoration:none;color:var(--ink);
  padding:0 .1rem 0 .2rem;white-space:nowrap;
}
.brand:hover{color:var(--ink)}

/* The mark, live: at rest it is the logo; poke it and it redraws itself out of
   the saddle into both basins, which is the motion the curve actually describes. */
.tile{
  flex:0 0 auto;position:relative;
  width:34px;height:51px;padding:0;
  border:none;background:none;cursor:pointer;
  display:grid;place-items:center;
  border-radius:12px;
  transition:transform .2s,background .2s;
}
.tile:hover{background:color-mix(in oklab, var(--water) 8%, transparent);transform:translateY(-1px)}
.tile{text-decoration:none}
.tile svg{display:block;width:100%;height:100%;overflow:visible}

.nav-links{
  margin-left:auto;display:flex;align-items:center;gap:.15rem;flex-wrap:wrap;
  font-family:var(--label);font-size:.79rem;letter-spacing:.015em;
}
.nav-links a{
  text-decoration:none;color:var(--mute);
  padding:.34rem .62rem;border-radius:999px;
  transition:color .15s,background .15s;
}
.nav-links a:hover{color:var(--ink);background:color-mix(in oklab, var(--water) 9%, transparent)}
.nav-links a.on{color:var(--ink);background:color-mix(in oklab, var(--contour) 12%, transparent)}
/* the commitment link gets a little pop: outlined, warm, still quiet */
.nav-links a.cta{
  color:var(--ink);margin-left:.35rem;
  border:1px solid color-mix(in oklab, var(--contour) 50%, transparent);
  background:color-mix(in oklab, var(--contour) 9%, transparent);
}
.nav-links a.cta:hover{
  color:var(--ink);
  border-color:var(--contour);
  background:color-mix(in oklab, var(--contour) 16%, transparent);
}
.nav-links a.cta.on{background:color-mix(in oklab, var(--contour) 20%, transparent)}
.expand{
  flex:0 0 auto;display:grid;place-items:center;
  width:32px;height:32px;margin-left:.15rem;
  border:1px solid var(--line);border-radius:999px;background:none;
  color:var(--mute);cursor:pointer;transition:color .15s,border-color .15s,background .15s;
}
.expand:hover{color:var(--water);border-color:var(--water);
  background:color-mix(in oklab, var(--water) 8%, transparent)}
@media (max-width:640px){
  .nav-inner{border-radius:22px}
  .tile{width:28px;height:42px}
  .nav-links{width:100%;margin-left:0;order:3;justify-content:center;
    border-top:1px solid var(--line-soft);padding-top:.4rem}
}

/* ------------------------------------------------------------- layout ---- */
.wrap{max-width:64rem;margin:0 auto;padding:clamp(1.6rem,5vw,3.4rem) clamp(1.1rem,4vw,2rem) 4rem}
.prose{max-width:38rem}
.prose.wide{max-width:44rem}

.eyebrow{
  font-family:var(--label);font-size:.7rem;font-weight:500;
  letter-spacing:.16em;text-transform:uppercase;color:var(--mute);
  display:block;margin-bottom:.7rem;
}
h1{
  font-family:var(--display);font-weight:600;
  font-size:clamp(2.3rem,6.5vw,4.1rem);line-height:1.05;
  letter-spacing:-.015em;margin-bottom:.6rem;
}
h1.hero{font-size:clamp(3rem,11vw,6.6rem);letter-spacing:-.03em}
h2{
  font-family:var(--display);font-weight:600;
  font-size:clamp(1.35rem,3vw,1.75rem);line-height:1.2;
  letter-spacing:-.012em;margin:0 0 .8rem;
}
h3{
  font-family:var(--display);font-weight:600;font-size:1.12rem;
  letter-spacing:-.005em;margin:0 0 .5rem;
}
p{margin-bottom:1.05rem}
p:last-child{margin-bottom:0}
.lede{
  font-size:clamp(1.18rem,2.4vw,1.42rem);line-height:1.52;
  color:var(--ink-soft);max-width:34rem;
}
.defn{font-style:italic;color:var(--mute);font-size:1rem;line-height:1.55;max-width:31rem}
.aside{color:var(--mute);font-size:.98rem}
em{font-style:italic}
strong{font-weight:600}
blockquote{
  border-left:2px solid color-mix(in oklab, var(--contour) 45%, transparent);
  padding-left:1.1rem;margin:0 0 1rem;color:var(--mute);font-style:italic;
}
ul,ol{margin:0 0 1.05rem 1.3rem}
li{margin-bottom:.5rem}
hr{border:none;border-top:1px solid var(--line);margin:2.6rem 0}
code{
  font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.84em;
  background:var(--card-2);border:1px solid var(--line-soft);
  padding:.1em .38em;border-radius:5px;overflow-wrap:anywhere;
}

section{margin-top:clamp(2.6rem,6vw,4rem)}
section:first-child{margin-top:0}

/* the front-page hero: copy and the live plate side by side on desktop,
   stacked (copy first) on mobile */
.hero-row{display:grid;gap:clamp(1.4rem,3.5vw,2.6rem);align-items:center}
@media (min-width:56rem){
  .hero-row{grid-template-columns:minmax(0,1fr) minmax(0,25rem)}
  .hero-row .plate{margin-top:0}
  .hero-row .plate svg{height:min(62vh,560px)}
}

/* ------------------------------------------------------------- cards ----- */
.card{
  background:color-mix(in oklab, var(--card) 88%, transparent);
  border:1px solid var(--line);
  border-radius:20px;
  padding:clamp(1.3rem,3.2vw,2.1rem);
  box-shadow:0 1px 2px rgba(74,52,30,.03), 0 18px 40px -32px rgba(74,52,30,.5);
  backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);
}
.card + .card{margin-top:1.1rem}
.cards{display:grid;gap:1.1rem;margin-top:1.6rem}
@media (min-width:56rem){.cards.two{grid-template-columns:1fr 1fr}}

/* a soft status pill: established / the bet / open / commitment */
.pill{
  display:inline-flex;align-items:center;gap:.42rem;
  font-family:var(--label);font-size:.68rem;font-weight:500;
  letter-spacing:.09em;text-transform:uppercase;color:var(--mute);
  background:var(--card-2);border:1px solid var(--line-soft);
  border-radius:999px;padding:.24rem .68rem;white-space:nowrap;
}
.pill::before{
  content:"";width:7px;height:7px;border-radius:999px;
  background:var(--mute);flex:0 0 auto;
}
.pill.established::before{background:var(--water)}
.pill.bet::before{background:var(--contour);box-shadow:0 0 0 3px color-mix(in oklab,var(--contour) 18%,transparent)}
.pill.open::before{background:transparent;border:1.5px dashed var(--mute)}
.pill.commitment::before{background:var(--ink);box-shadow:0 0 0 2px var(--card),0 0 0 3.5px var(--ink)}
.pills{display:flex;flex-wrap:wrap;gap:.45rem;margin-bottom:1.1rem}

.head{display:flex;align-items:baseline;gap:.8rem;flex-wrap:wrap;margin-bottom:1rem}
.head h2,.head h3{margin-bottom:0}

/* numbered open questions */
ol.qs{list-style:none;counter-reset:q;margin:.4rem 0 0}
ol.qs li{
  counter-increment:q;position:relative;
  padding:0 0 1.15rem 2.7rem;margin-bottom:1.15rem;
  border-bottom:1px solid var(--line-soft);
}
ol.qs li:last-child{border-bottom:none;padding-bottom:0;margin-bottom:0}
ol.qs li::before{
  content:counter(q);position:absolute;left:0;top:.1rem;
  width:1.7rem;height:1.7rem;display:grid;place-items:center;
  font-family:var(--label);font-size:.74rem;font-weight:600;
  color:var(--contour);background:color-mix(in oklab,var(--contour) 10%,transparent);
  border-radius:999px;
}

/* the approach list on /what/: bold claim, short specifics */
ul.core li{margin-bottom:1.3rem}
ul.core li::marker{color:var(--contour)}

/* the four working verbs */
.verb{padding-top:1.4rem;margin-top:1.4rem;border-top:1px solid var(--line-soft)}
.verb:first-of-type{border-top:none;padding-top:0;margin-top:0}

/* a call-out that points somewhere else */
.pointer{
  display:flex;align-items:center;gap:1rem;flex-wrap:wrap;
  border:1px solid color-mix(in oklab,var(--water) 30%,var(--line));
  background:color-mix(in oklab,var(--water) 5%,var(--card));
  border-radius:16px;padding:1rem 1.3rem;margin:1.4rem 0 0;
}
.pointer p{margin:0;font-size:.99rem;color:var(--ink-soft)}
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  font-family:var(--label);font-size:.82rem;font-weight:500;letter-spacing:.01em;
  text-decoration:none;color:var(--card);background:var(--ink);
  border:1px solid var(--ink);border-radius:999px;padding:.5rem 1.05rem;
  cursor:pointer;transition:opacity .15s,transform .15s;white-space:nowrap;
}
.btn:hover{color:var(--card);opacity:.86;transform:translateY(-1px)}
.btn.ghost{background:none;color:var(--ink);border-color:var(--line)}
.btn.ghost:hover{color:var(--water);border-color:var(--water);opacity:1}

/* -------------------------------------------------------- the figure ----- */
.plate{
  margin:clamp(1.8rem,4vw,2.8rem) 0 0;
  background:color-mix(in oklab,var(--card) 72%, transparent);
  border:1px solid var(--line);border-radius:22px;
  padding:clamp(.9rem,2.4vw,1.5rem);
  box-shadow:0 1px 2px rgba(74,52,30,.03), 0 22px 50px -38px rgba(74,52,30,.55);
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
}
/* The plate is portrait-shaped now, so bound it by height and centre it —
   at full page width it would be over a thousand pixels tall. */
.plate svg{
  display:block;margin:0 auto;cursor:crosshair;border-radius:14px;
  width:auto;max-width:100%;height:min(74vh,660px);
}
@media (max-width:640px){.plate svg{width:100%;height:auto}}
.fig-tick{font-family:var(--label);font-size:12px;fill:var(--mute)}
.tick{stroke:var(--mute);stroke-width:1;opacity:.6}
.fig-feature{
  font-family:var(--label);font-weight:600;font-size:13px;letter-spacing:.34em;
  fill:var(--ink);paint-order:stroke;stroke:var(--card);stroke-width:4.5px;stroke-linejoin:round;
}
.fig-name{
  font-family:var(--body);font-style:italic;font-size:17px;
  paint-order:stroke;stroke:var(--card);stroke-width:5px;stroke-linejoin:round;
}
.fig-name.water{fill:var(--water)}
.fig-name.contour{fill:var(--contour)}
.fig-small{font-family:var(--label);font-size:12.5px;fill:var(--mute);
  paint-order:stroke;stroke:var(--card);stroke-width:4px;stroke-linejoin:round}
figcaption{
  margin-top:1rem;font-size:.94rem;line-height:1.6;color:var(--mute);max-width:52rem;
}
figcaption b{color:var(--ink-soft);font-weight:600}
.fig-actions{margin-top:1rem;display:flex;gap:.6rem;align-items:center;flex-wrap:wrap}
.drawing{transition:stroke-dashoffset 1.4s cubic-bezier(.45,0,.3,1)}
.user-traj{opacity:.92;transition:opacity 1.6s ease}
.user-traj.fading{opacity:0}

/* ------------------------------------------------------ expand overlay --- */
.overlay{
  position:fixed;inset:0;z-index:100;display:none;
  padding:clamp(.6rem,3vw,2rem);
  background:color-mix(in oklab,var(--paper) 72%, transparent);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  overflow:auto;
}
.overlay[open],.overlay.on{display:grid;place-items:center}
.overlay .plate{max-width:64rem;width:100%;margin:auto;
  background:var(--card);box-shadow:0 40px 90px -50px rgba(74,52,30,.8)}
.overlay-close{
  position:absolute;top:clamp(.8rem,3vw,1.6rem);right:clamp(.8rem,3vw,1.6rem);
  width:38px;height:38px;display:grid;place-items:center;
  border:1px solid var(--line);border-radius:999px;background:var(--card);
  color:var(--mute);cursor:pointer;font-size:1.1rem;line-height:1;
}
.overlay-close:hover{color:var(--contour);border-color:var(--contour)}

/* -------------------------------------------------------- commitment ----- */
/* the commitment tree keeps its own second-level nav under the site nav */
.subnav{
  display:flex;flex-wrap:wrap;gap:.2rem;margin:0 0 2rem;
  font-family:var(--label);font-size:.79rem;
  border-bottom:1px solid var(--line-soft);padding-bottom:.6rem;
}
.subnav a{
  text-decoration:none;color:var(--mute);padding:.3rem .7rem;border-radius:999px;
}
.subnav a:hover{color:var(--ink);background:color-mix(in oklab,var(--water) 9%,transparent)}
.subnav a.on{color:var(--ink);background:color-mix(in oklab,var(--contour) 12%,transparent)}

.doc h2{
  font-size:1.3rem;margin:2.6rem 0 .9rem;padding-bottom:.4rem;
  border-bottom:1px solid var(--line-soft);
}
.doc h3{margin:1.9rem 0 .6rem}
.doc table{width:100%;border-collapse:collapse;margin:1rem 0 1.5rem;font-size:.95rem}
.doc th{
  font-family:var(--label);font-size:.72rem;font-weight:600;letter-spacing:.09em;
  text-transform:uppercase;color:var(--mute);text-align:left;
  padding:.5rem .7rem;border-bottom:1px solid var(--ink);
}
.doc td{padding:.62rem .7rem;border-bottom:1px solid var(--line-soft);vertical-align:top}
.table-wrap{overflow-x:auto}
.empty{
  border:1px dashed var(--line);border-radius:14px;
  padding:1.4rem 1.6rem;margin:1rem 0 1.5rem;color:var(--mute);font-style:italic;
}
.doc .subtitle{color:var(--mute);font-style:italic;margin:-.2rem 0 2.2rem}
.doc .notice{
  border-left:3px solid color-mix(in oklab,var(--contour) 55%,transparent);
  background:color-mix(in oklab,var(--contour) 5%,transparent);
  border-radius:0 12px 12px 0;padding:.75rem 1.1rem;margin:1.3rem 0;color:var(--mute);
}
.doc .entry{
  background:color-mix(in oklab,var(--card) 82%,transparent);
  border:1px solid var(--line);border-radius:18px;
  padding:1.4rem 1.7rem;margin:1.5rem 0;
  box-shadow:0 1px 2px rgba(74,52,30,.03), 0 18px 40px -34px rgba(74,52,30,.5);
}
.doc .entry h3{
  font-family:var(--display);font-weight:600;font-size:1.06rem;
  letter-spacing:-.005em;text-transform:none;margin-bottom:.7rem;
}
.doc .entry .meta{
  font-family:var(--label);font-size:.78rem;color:var(--mute);
  margin-bottom:1rem;line-height:1.85;
}
.doc .entry .meta code{font-size:.85em;word-break:break-all}
.doc details{margin:1rem 0}
.doc summary{
  cursor:pointer;font-family:var(--label);font-size:.79rem;color:var(--mute);
}
.doc summary:hover{color:var(--water)}
.doc .footer{
  margin-top:3rem;padding-top:1rem;border-top:1px solid var(--line);
  font-family:var(--label);font-size:.78rem;color:var(--mute);line-height:1.9;
}
.doc .footer a{text-decoration:none}
.doc blockquote{
  border-left:3px solid color-mix(in oklab,var(--water) 40%,transparent);
  padding:.2rem 0 .2rem 1.1rem;margin:0 0 1rem;color:var(--ink);font-style:normal;
}
.frozen{
  border:1px solid color-mix(in oklab,var(--contour) 45%,transparent);
  background:color-mix(in oklab,var(--contour) 6%,transparent);
  color:var(--contour);border-radius:14px;
  padding:.9rem 1.2rem;margin:0 0 2rem;
  font-family:var(--label);font-size:.78rem;letter-spacing:.02em;line-height:1.6;
}

/* -------------------------------------------------------------- footer --- */
footer{
  margin-top:clamp(3rem,7vw,5rem);padding-top:1.8rem;
  border-top:1px solid var(--line);
}
footer .links{
  list-style:none;margin:0 0 1.6rem;display:flex;flex-wrap:wrap;gap:.5rem 1.6rem;
  font-family:var(--label);font-size:.86rem;
}
footer .links a{text-decoration:none;color:var(--mute)}
footer .links a:hover{color:var(--water)}
.colophon{color:var(--mute);font-size:.88rem;line-height:1.65;max-width:44rem}
.colophon + .colophon{margin-top:.7rem}

@media print{
  .nav,.fig-actions,.overlay{display:none}
  body::before,body::after{display:none}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .drawing{transition:none}
  *{animation-duration:.001ms!important}
}