/* ============================================================
   SALT companion — editorial scientific stylesheet
   Anonymous double-blind release. No identifying info.
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300;0,9..144,400;0,9..144,500;0,9..144,600;1,9..144,400&family=Spline+Sans+Mono:wght@400;500&family=Newsreader:ital,opsz,wght@0,6..72,400;0,6..72,500;1,6..72,400&display=swap');

:root{
  --paper:#f5f0e6;
  --paper-2:#efe8d9;
  --ink:#211d18;
  --ink-soft:#4a443a;
  --ink-faint:#8a8170;
  --line:#d8cfbc;
  --line-strong:#bcb19b;
  --accent:#9c3b2e;       /* oxblood / terracotta */
  --accent-2:#b86a3d;     /* clay */
  --c-open:#3b6ea5;
  --c-instruct:#c47a33;
  --c-reasoning:#4f9d69;
  --c-frontier:#9c3b2e;
  --shadow:0 1px 0 var(--line),0 18px 40px -28px rgba(33,29,24,.45);
  --maxw:1180px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:'Newsreader',Georgia,serif;
  font-size:18px;
  line-height:1.62;
  -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(circle at 18% -5%,rgba(156,59,46,.05),transparent 45%),
    radial-gradient(circle at 95% 8%,rgba(75,103,165,.05),transparent 40%);
  background-attachment:fixed;
}
::selection{background:var(--accent);color:var(--paper)}

/* grain overlay */
body::after{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:1;opacity:.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='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}

/* ---------- top bar ---------- */
.topbar{
  position:sticky;top:0;z-index:50;
  backdrop-filter:blur(8px);
  background:rgba(245,240,230,.82);
  border-bottom:1px solid var(--line);
}
.topbar .inner{
  max-width:var(--maxw);margin:0 auto;padding:.7rem 2rem;
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
}
.brand{font-family:'Fraunces';font-weight:600;font-size:1.05rem;letter-spacing:.01em;display:flex;align-items:center;gap:.55rem}
.brand .glyph{
  width:26px;height:26px;border:1.5px solid var(--ink);border-radius:50%;
  display:grid;place-items:center;font-size:.7rem;font-family:'Spline Sans Mono';
  position:relative;overflow:hidden;
}
.brand .glyph::before{content:"";position:absolute;inset:0;background:
  repeating-linear-gradient(90deg,var(--accent) 0 1.5px,transparent 1.5px 4px);opacity:.55}
nav.menu{display:flex;gap:1.4rem;font-family:'Spline Sans Mono';font-size:.74rem;text-transform:uppercase;letter-spacing:.13em}
nav.menu a{color:var(--ink-soft)}
nav.menu a:hover{color:var(--accent);text-decoration:none}
.anon-pill{
  font-family:'Spline Sans Mono';font-size:.62rem;letter-spacing:.12em;text-transform:uppercase;
  border:1px solid var(--line-strong);border-radius:999px;padding:.28rem .6rem;color:var(--ink-faint);
}
@media(max-width:820px){nav.menu{display:none}}

/* ---------- layout ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 2rem;position:relative;z-index:2}
section{padding:5.5rem 0;border-bottom:1px solid var(--line)}
.eyebrow{font-family:'Spline Sans Mono';font-size:.72rem;letter-spacing:.22em;text-transform:uppercase;color:var(--accent);display:flex;align-items:center;gap:.7rem}
.eyebrow::before{content:"";width:34px;height:1px;background:var(--accent)}
h1,h2,h3{font-family:'Fraunces';font-weight:500;line-height:1.04;letter-spacing:-.012em}
h2{font-size:clamp(1.9rem,4vw,3rem);margin:.8rem 0 1.1rem}
h3{font-size:1.45rem;margin:0 0 .5rem;font-weight:600}
p.lead{font-size:1.22rem;color:var(--ink-soft);max-width:62ch}
.sec-num{font-family:'Fraunces';font-style:italic;font-weight:300;color:var(--line-strong);font-size:.95rem}

/* ---------- hero ---------- */
.hero{padding:6.5rem 0 5rem;border-bottom:1px solid var(--line);position:relative}
.hero h1{font-size:clamp(2.8rem,7.2vw,6.2rem);font-weight:400;max-width:16ch}
.hero h1 em{font-style:italic;color:var(--accent);font-weight:300}
.hero .kicker{margin-bottom:1.6rem}
.hero .sub{font-size:1.3rem;color:var(--ink-soft);max-width:60ch;margin-top:1.6rem}
.hero .qbox{
  margin-top:2.6rem;border-left:3px solid var(--accent);padding:.4rem 0 .4rem 1.4rem;
  font-style:italic;font-size:1.35rem;color:var(--ink);max-width:54ch;font-family:'Fraunces';font-weight:300;
}
.statband{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:3.4rem;border:1px solid var(--line-strong)}
.statband .stat{padding:1.4rem 1.2rem;border-right:1px solid var(--line);background:var(--paper-2)}
.statband .stat:last-child{border-right:none}
.statband .num{font-family:'Fraunces';font-size:2.5rem;font-weight:400;line-height:1;color:var(--accent)}
.statband .lab{font-family:'Spline Sans Mono';font-size:.66rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-faint);margin-top:.5rem}
@media(max-width:720px){.statband{grid-template-columns:repeat(2,1fr)}.statband .stat:nth-child(2){border-right:none}}

/* ---------- generic cards / grid ---------- */
.grid2{display:grid;grid-template-columns:1.1fr .9fr;gap:3rem;align-items:start}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem}
@media(max-width:880px){.grid2,.grid3{grid-template-columns:1fr}}
.card{background:var(--paper-2);border:1px solid var(--line);padding:1.6rem;box-shadow:var(--shadow)}
.card h3{font-size:1.15rem}
.card .meta{font-family:'Spline Sans Mono';font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-faint)}

/* protocol chips */
.protochips{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1.4rem}
.chip{font-family:'Spline Sans Mono';font-size:.7rem;letter-spacing:.06em;padding:.4rem .7rem;border:1px solid var(--line-strong);border-radius:4px;color:var(--ink-soft);background:var(--paper)}
.chip b{color:var(--accent)}

/* ---------- finding callouts ---------- */
.finding{display:grid;grid-template-columns:auto 1fr;gap:1.4rem;padding:1.5rem 0;border-top:1px solid var(--line)}
.finding:last-child{border-bottom:1px solid var(--line)}
.finding .tag{font-family:'Spline Sans Mono';font-size:.78rem;color:var(--accent);font-weight:500;white-space:nowrap;padding-top:.2rem}
.finding p{color:var(--ink-soft);font-size:1.02rem}
.finding strong{color:var(--ink)}
.flag{display:inline-block;font-family:'Spline Sans Mono';font-size:.6rem;letter-spacing:.1em;text-transform:uppercase;background:var(--accent);color:var(--paper);padding:.15rem .45rem;border-radius:3px;margin-left:.4rem;vertical-align:middle}

/* ---------- charts ---------- */
.chart-shell{background:var(--paper-2);border:1px solid var(--line);box-shadow:var(--shadow);padding:1.4rem 1.4rem 1rem}
.chart-shell h3{font-size:1.1rem;margin-bottom:.2rem}
.chart-shell .cap{font-size:.92rem;color:var(--ink-faint);margin-bottom:1rem;max-width:70ch}
.chart-canvas{position:relative;width:100%}
.controls{display:flex;flex-wrap:wrap;gap:.6rem;margin:.6rem 0 1rem;align-items:center}
.controls .lbl{font-family:'Spline Sans Mono';font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-faint);margin-right:.3rem}
.toggle{font-family:'Spline Sans Mono';font-size:.72rem;border:1px solid var(--line-strong);background:var(--paper);color:var(--ink-soft);padding:.34rem .7rem;border-radius:4px;cursor:pointer;transition:.15s}
.toggle:hover{border-color:var(--ink)}
.toggle.on{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.toggle.cat-open.on{background:var(--c-open);border-color:var(--c-open)}
.toggle.cat-instruct.on{background:var(--c-instruct);border-color:var(--c-instruct)}
.toggle.cat-reasoning.on{background:var(--c-reasoning);border-color:var(--c-reasoning)}
.toggle.cat-frontier.on{background:var(--c-frontier);border-color:var(--c-frontier)}
select.sel{font-family:'Spline Sans Mono';font-size:.74rem;padding:.34rem .6rem;border:1px solid var(--line-strong);background:var(--paper);color:var(--ink);border-radius:4px}

/* legend dots */
.legend{display:flex;flex-wrap:wrap;gap:1rem;margin-top:.8rem;font-family:'Spline Sans Mono';font-size:.72rem;color:var(--ink-soft)}
.legend span{display:flex;align-items:center;gap:.4rem}
.legend i{width:11px;height:11px;border-radius:2px;display:inline-block}

/* figure embed */
figure.embed{background:var(--paper-2);border:1px solid var(--line);box-shadow:var(--shadow);padding:1.2rem}
figure.embed img{width:100%;height:auto;display:block;mix-blend-mode:multiply}
figure.embed figcaption{font-size:.92rem;color:var(--ink-faint);margin-top:.8rem;font-style:italic}

/* table */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);box-shadow:var(--shadow)}
table.data{border-collapse:collapse;width:100%;font-family:'Spline Sans Mono';font-size:.8rem;background:var(--paper-2)}
table.data th,table.data td{padding:.5rem .7rem;text-align:right;border-bottom:1px solid var(--line);white-space:nowrap}
table.data th{position:sticky;top:0;background:var(--paper-2);text-transform:uppercase;letter-spacing:.08em;font-size:.66rem;color:var(--ink-faint);cursor:pointer;user-select:none}
table.data th:hover{color:var(--accent)}
table.data td:first-child,table.data th:first-child{text-align:left;font-family:'Newsreader';font-size:.92rem}
table.data tr:hover td{background:rgba(156,59,46,.05)}
.catdot{display:inline-block;width:9px;height:9px;border-radius:2px;margin-right:.5rem;vertical-align:middle}
.heat{position:relative}
.heat::before{content:"";position:absolute;inset:0;opacity:var(--h,0);background:var(--accent);mix-blend-mode:multiply;pointer-events:none}

/* taxonomy tree (d3) */
#tree-shell svg{width:100%;height:auto;display:block;font-family:'Spline Sans Mono'}
.node circle{fill:var(--paper);stroke:var(--ink-soft);stroke-width:1.4px;cursor:pointer}
.node.leaf circle{fill:var(--accent-2);stroke:var(--accent)}
.node.collapsed circle{fill:var(--ink);stroke:var(--ink)}
.node text{font-size:9.5px;fill:var(--ink);paint-order:stroke;stroke:var(--paper);stroke-width:3px}
.link{fill:none;stroke:var(--line-strong);stroke-width:1px}

/* footer */
footer{padding:3.5rem 0 4.5rem;text-align:center}
footer .small{font-family:'Spline Sans Mono';font-size:.72rem;color:var(--ink-faint);letter-spacing:.05em;line-height:2}
footer .rule{width:60px;height:1px;background:var(--line-strong);margin:0 auto 2rem}

/* reveal on scroll */
.reveal{opacity:1;transform:none;transition:opacity .7s ease,transform .7s ease}
/* JS adds .js-reveal to <html> when IntersectionObserver is available, enabling the hidden initial state */
.js-reveal .reveal{opacity:0;transform:translateY(18px)}
.js-reveal .reveal.in{opacity:1;transform:none}

/* misc */
.note{font-size:.92rem;color:var(--ink-faint);font-style:italic}
.kbd{font-family:'Spline Sans Mono';font-size:.72rem;background:var(--paper);border:1px solid var(--line-strong);border-radius:3px;padding:.05rem .35rem}
.divider-num{font-family:'Fraunces';font-size:clamp(4rem,12vw,9rem);font-weight:300;color:var(--line);line-height:.8;font-style:italic}

/* ---------- Prompt-template bank (section 09) ---------- */
.ph-legend{border:1px solid var(--line);border-radius:10px;padding:1rem 1.2rem;background:rgba(255,255,255,.35)}
.ph-title{font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-faint);margin-bottom:.6rem}
.ph-row{display:flex;gap:.8rem;align-items:baseline;padding:.18rem 0;font-size:.9rem;color:var(--ink-soft)}
.ph-row code{font-family:ui-monospace,'SFMono-Regular',Menlo,monospace;color:var(--accent);background:rgba(156,59,46,.07);padding:.1rem .4rem;border-radius:5px;white-space:nowrap;font-size:.84rem}

.pt-family{margin-top:2rem}
.pt-fhead{font-family:'Fraunces',Georgia,serif;font-size:1.45rem;color:var(--ink);display:flex;align-items:baseline;gap:.7rem;flex-wrap:wrap}
.pt-fnum{font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);font-family:system-ui,sans-serif;border:1px solid var(--line-strong);border-radius:999px;padding:.18rem .6rem}
.pt-fblurb{color:var(--ink-soft);margin:.4rem 0 1rem;font-size:.98rem}

.pt-proto{border:1px solid var(--line);border-radius:11px;background:rgba(255,255,255,.4);margin:.7rem 0;overflow:hidden}
.pt-proto>summary{cursor:pointer;list-style:none;padding:.95rem 1.2rem;display:flex;align-items:center;gap:.7rem;font-weight:600;color:var(--ink);user-select:none}
.pt-proto>summary::-webkit-details-marker{display:none}
.pt-proto>summary::after{content:'+';margin-left:auto;font-size:1.2rem;color:var(--ink-faint);font-weight:400}
.pt-proto[open]>summary::after{content:'–'}
.pt-proto[open]>summary{border-bottom:1px solid var(--line)}
.pt-pid{font-family:ui-monospace,monospace;font-size:.8rem;font-weight:700;color:#fff;background:var(--accent);border-radius:6px;padding:.18rem .5rem}
.pt-total{margin-left:auto;font-size:.78rem;color:var(--ink-faint);font-weight:400;white-space:nowrap}
.pt-proto[open]>summary .pt-total{margin-left:0}
.pt-note{color:var(--ink-soft);font-size:.92rem;padding:.9rem 1.2rem 0;margin:0}

.pt-group{padding:.4rem 1.2rem 1rem}
.pt-style{font-size:.8rem;letter-spacing:.04em;text-transform:uppercase;color:var(--ink-faint);margin:1rem 0 .5rem;display:flex;align-items:center;gap:.5rem}
.pt-count{background:var(--line);color:var(--ink-soft);border-radius:999px;padding:.05rem .5rem;font-size:.72rem}
.pt-variant{display:flex;gap:.7rem;margin:.5rem 0}
.pt-idx{flex:0 0 auto;width:1.5rem;height:1.5rem;border-radius:50%;border:1px solid var(--line-strong);display:flex;align-items:center;justify-content:center;font-size:.78rem;color:var(--ink-faint);margin-top:.15rem}
.pt-body{flex:1;min-width:0}
.pt-pre{font-family:ui-monospace,'SFMono-Regular',Menlo,monospace;font-size:.82rem;line-height:1.5;color:var(--ink);background:rgba(33,29,24,.04);border:1px solid var(--line);border-radius:8px;padding:.7rem .85rem;white-space:pre-wrap;word-break:break-word;margin:.2rem 0}
.pt-turn{font-size:.7rem;letter-spacing:.06em;text-transform:uppercase;color:var(--c-reasoning);font-weight:600;margin-top:.4rem}
.pt-foot{display:flex;gap:.6rem;align-items:center;flex-wrap:wrap;margin-top:.3rem}
.pt-tag{font-size:.72rem;color:var(--ink-faint);border:1px dashed var(--line-strong);border-radius:5px;padding:.08rem .45rem}
.pt-rules{font-size:.8rem}
.pt-rules>summary{cursor:pointer;color:var(--ink-faint);font-size:.78rem}