/* agentvcs — project site.
   Same design system as the Evolving Agents Labs site (evolvingagentslabs.github.io):
   identical tokens, typography and components, so the project page and the org page
   read as one publication. Hand-written; no preprocessor. */
:root{
  --paper:#F5F5F2; --ground:#FFFFFF;
  --ink:#15171B; --ink-2:#4A4F58; --ink-3:#767C86;
  --rule:#DEDEDA; --rule-strong:#C4C4BF;
  --accent:#3E52A3; --signal:#8A5C10; --alert:#9B3B2F;
  --serif:"Newsreader",Georgia,"Times New Roman",serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --pad:clamp(1.25rem,5vw,3rem);
}
@media (prefers-color-scheme:dark){
  :root{
    --paper:#0F1114; --ground:#15181C;
    --ink:#E8E8E4; --ink-2:#A8ADB6; --ink-3:#767C86;
    --rule:#262A30; --rule-strong:#363B43;
    --accent:#8B9BE0; --signal:#D9A441; --alert:#D98A7B;
  }
}
:root[data-theme="dark"]{
  --paper:#0F1114; --ground:#15181C;
  --ink:#E8E8E4; --ink-2:#A8ADB6; --ink-3:#767C86;
  --rule:#262A30; --rule-strong:#363B43;
  --accent:#8B9BE0; --signal:#D9A441; --alert:#D98A7B;
}
:root[data-theme="light"]{
  --paper:#F5F5F2; --ground:#FFFFFF;
  --ink:#15171B; --ink-2:#4A4F58; --ink-3:#767C86;
  --rule:#DEDEDA; --rule-strong:#C4C4BF;
  --accent:#3E52A3; --signal:#8A5C10; --alert:#9B3B2F;
}

*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--sans);font-size:16px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px;}
a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:2px;}
.wrap{max-width:min(52rem,100%);margin:0 auto;padding-inline:var(--pad);}

/* masthead — the org's, with the project wordmark */
header{border-bottom:1px solid var(--rule);background:var(--paper);}
header .wrap{
  display:flex;align-items:baseline;justify-content:space-between;
  gap:1.5rem;flex-wrap:wrap;padding-block:1.75rem 1.5rem;
}
.logo,.logo a{
  font-family:var(--mono);font-size:.8125rem;font-weight:500;
  letter-spacing:.08em;text-transform:uppercase;text-decoration:none;color:var(--ink);
}
.logo .p{color:var(--accent);}
nav{display:flex;gap:1.5rem;flex-wrap:wrap;
  font-family:var(--mono);font-size:.75rem;letter-spacing:.04em;}
nav a{color:var(--ink-2);text-decoration:none;transition:color .15s;}
nav a:hover{color:var(--accent);}

/* structure */
section{padding-block:clamp(2.5rem,6vw,3.75rem);border-bottom:1px solid var(--rule);}
.hero{padding-block:clamp(2rem,5vw,3rem) clamp(2.5rem,6vw,4rem);}
h1{
  font-family:var(--serif);font-weight:300;
  font-size:clamp(2rem,5.4vw,3.5rem);line-height:1.12;
  letter-spacing:-.018em;margin:0 0 1.5rem;max-width:22ch;text-wrap:balance;
}
h2{
  font-family:var(--mono);font-size:.6875rem;font-weight:400;
  letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);
  margin:0 0 1rem;
}
h3{
  font-family:var(--serif);font-weight:400;
  font-size:clamp(1.375rem,2.6vw,1.75rem);line-height:1.25;letter-spacing:-.012em;
  margin:0 0 1rem;text-wrap:balance;color:var(--ink);
}
p{margin:0 0 1.15rem;color:var(--ink-2);max-width:70ch;}
.lead{
  font-family:var(--serif);font-weight:300;
  font-size:clamp(1.1875rem,2.4vw,1.5rem);line-height:1.4;
  color:var(--ink);max-width:60ch;
}
.sub{color:var(--ink-3);}
b,strong{color:var(--ink);font-weight:600;}
em{color:var(--ink);}
ul{margin:0 0 1.15rem;padding-left:1.25rem;color:var(--ink-2);max-width:70ch;}
li{margin-bottom:.5rem;}
.num{font-family:var(--mono);font-size:.75rem;letter-spacing:.1em;color:var(--ink-3);}

/* buttons — the org's .cta */
.cta{display:flex;gap:.75rem;flex-wrap:wrap;margin-top:1.75rem;}
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  font-family:var(--mono);font-size:.8125rem;
  padding:.6rem 1rem;border:1px solid var(--rule-strong);border-radius:3px;
  text-decoration:none;color:var(--ink);background:var(--ground);
  transition:border-color .18s,color .18s;
}
.btn:hover{border-color:var(--accent);color:var(--accent);}
.btn.primary{border-color:var(--accent);color:var(--accent);}

/* cards */
.grid{display:grid;grid-template-columns:1fr 1fr;gap:1.25rem;}
@media(max-width:44rem){.grid{grid-template-columns:1fr;}}
.card{
  background:var(--ground);border:1px solid var(--rule);border-radius:4px;
  padding:1.5rem;display:flex;flex-direction:column;
}
.card h3{font-size:1.25rem;margin:.5rem 0 .75rem;}
.card p{flex:1;font-size:.9375rem;}
.card .k,.card .tag{
  font-family:var(--mono);font-size:.6875rem;font-weight:500;
  letter-spacing:.06em;text-transform:uppercase;color:var(--ink-3);
}
.card .btn{align-self:flex-start;margin-top:.5rem;}

/* fluid / crystallized state chips — the org's .badge */
.state{
  font-family:var(--mono);font-size:.6875rem;font-weight:500;
  letter-spacing:.06em;text-transform:lowercase;
  padding:.2em .55em;border:1px solid currentColor;border-radius:2px;
  white-space:nowrap;line-height:1.3;align-self:flex-start;
}
.state.fluid{color:var(--accent);}
.state.crystal{color:var(--signal);}

/* terminal transcript — a printed figure on its own ground, like .hero-figure */
.term{
  background:var(--ground);border:1px solid var(--rule);border-radius:4px;
  overflow:hidden;margin:1rem 0 1.15rem;
}
.term .bar{
  display:flex;gap:.45rem;padding:.65rem .9rem;align-items:center;
  border-bottom:1px solid var(--rule);
}
.dot{width:.5rem;height:.5rem;border-radius:50%;background:var(--rule-strong);}
.term .ttl{
  font-family:var(--mono);font-size:.6875rem;letter-spacing:.04em;
  color:var(--ink-3);margin-left:.5rem;
}
.term pre{
  margin:0;padding:1rem;overflow-x:auto;
  font-family:var(--mono);font-size:.8125rem;line-height:1.7;color:var(--ink);
  white-space:pre-wrap;
}

/* transcript ink — the two accents the org already uses, nothing new */
.c{color:var(--ink-3);}          /* comment */
.cmd{color:var(--ink);font-weight:500;}
.ff,.b{color:var(--accent);}     /* fluid */
.cy,.g,.ok{color:var(--signal);} /* crystallized / proven */
.ac,.a{color:var(--signal);}
.rd,.r{color:var(--alert);}
.dim{color:var(--ink-3);}

/* verdict / theory rails */
.verdict{border-left:2px solid var(--rule-strong);padding:.15rem 0 .15rem 1rem;margin:.5rem 0;}
.verdict.bad{border-color:var(--alert);}
.verdict.good{border-color:var(--accent);}
.verdict.warn{border-color:var(--signal);}
.theory,.agent-note{
  border-left:2px solid var(--rule-strong);padding-left:1rem;margin:1rem 0 1.15rem;
  color:var(--ink-3);font-size:.875rem;line-height:1.65;max-width:70ch;
}

/* code + tables */
code{
  font-family:var(--mono);font-size:.875em;
  background:var(--ground);border:1px solid var(--rule);border-radius:3px;padding:.1em .35em;
  color:var(--ink);
}
.tbl-wrap{overflow-x:auto;margin:1rem 0 1.15rem;}
table{width:100%;border-collapse:collapse;font-size:.875rem;}
th,td{text-align:left;padding:.65rem .7rem;border-bottom:1px solid var(--rule);
  vertical-align:top;color:var(--ink-2);}
th{
  font-family:var(--mono);font-size:.6875rem;font-weight:500;
  letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);
  border-bottom:1px solid var(--rule-strong);
}

/* figures — kept on their paper ground in dark mode, as on the org site */
.hero-img{
  display:block;width:100%;height:auto;margin:0 0 2rem;
  border:1px solid var(--rule);border-radius:4px;background:var(--ground);
}
@media (prefers-color-scheme:dark){
  .hero-img{border-color:var(--rule-strong);filter:brightness(.88) saturate(.95);}
}
:root[data-theme="dark"] .hero-img{border-color:var(--rule-strong);filter:brightness(.88) saturate(.95);}
:root[data-theme="light"] .hero-img{filter:none;}

/* footers */
.nav-prev-next{
  display:flex;justify-content:space-between;gap:.75rem;flex-wrap:wrap;
  font-family:var(--mono);font-size:.8125rem;
}
footer{
  border-top:1px solid var(--rule-strong);
  padding-block:2.5rem 3.5rem;
  font-family:var(--mono);font-size:.75rem;color:var(--ink-3);
}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:.75rem;}
footer a{color:var(--ink-2);text-decoration:none;}
footer a:hover{color:var(--accent);}
@media (prefers-reduced-motion:reduce){*{transition:none !important;animation:none !important;}}