/* ============================================================
   Towards Effective Theory of LLMs — project page
   Clean academic, single-page scroll (Anthropic-blog feel)
   ============================================================ */

:root{
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*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
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a:hover{text-decoration:underline}
em{font-style:italic}
strong{font-weight:600}
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/* ---------- left nav ---------- */
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/* ---------- hero ---------- */
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.herolede strong{color:var(--ink)}

/* ---------- sections ---------- */
main section{padding:64px 0;border-bottom:1px solid var(--rule)}
main section:last-of-type{border-bottom:none}
#abstract{padding:60px 0}
.section-num{
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p{margin:0 0 20px}
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/* ---------- desiderata cards ---------- */
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/* ---------- schematic ---------- */
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.flow-node small{font-weight:400;color:var(--ink-faint);font-size:12.5px}
.flow-node.frozen{border-color:#d8d3c4;background:#f5f3ec;color:var(--frozen)}
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.schematic figcaption{
  font-family:var(--sans);font-size:14px;color:var(--ink-faint);
  margin-top:16px;
}

/* ---------- callout & figures ---------- */
.callout{
  background:var(--bg-alt);border:1px solid var(--rule);
  border-radius:16px;padding:30px 30px 14px;margin:38px 0 0;
}
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/* wide breakout for big figures / demos */
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}

/* ---------- stats ---------- */
.stats{
  display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:36px 0 8px;
}
@media (max-width:780px){.stats{grid-template-columns:1fr}}
.stat{
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  padding:24px 22px;
}
.stat-num{
  display:block;font-size:34px;font-weight:600;color:var(--accent);
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}
.stat-pm{font-size:18px;color:var(--ink-faint);font-weight:400}
.stat-lab{
  display:block;font-family:var(--sans);font-size:14px;
  color:var(--ink-soft);margin-top:8px;line-height:1.45;
}
.stat-lab small{color:var(--ink-faint);font-size:12.5px}

/* ---------- interactive demo ---------- */
.demo{
  margin-top:34px;margin-bottom:8px;
  border:1px solid var(--rule);border-radius:16px;
  background:#fff;overflow:hidden;
}
.demo-bar{
  display:flex;align-items:center;justify-content:space-between;
  gap:14px;padding:10px 16px;background:var(--bg-alt);
  border-bottom:1px solid var(--rule);flex-wrap:wrap;
}
.pills{display:flex;gap:8px;flex-wrap:wrap}
.pill{
  font-family:var(--sans);font-size:13.5px;font-weight:600;
  padding:7px 15px;border-radius:999px;cursor:pointer;
  border:1px solid var(--rule);background:#fff;color:var(--ink-soft);
  transition:all .13s ease;
}
.pill:hover{border-color:var(--ink-faint)}
.pill.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.fs-link{
  font-family:var(--sans);font-size:13px;font-weight:600;
  color:var(--ink-soft);white-space:nowrap;
}
/* mental-state demo bar: "Choose sample" dropdown on the left,
   fullscreen link on the right (compact). */
.demo-pick{display:inline-flex;align-items:center;gap:10px;}
.demo-pick-lab{font-family:var(--sans);font-size:11px;font-weight:700;
  color:var(--ink-soft);letter-spacing:.06em;text-transform:uppercase;}
.demo-pick-sel{font-family:var(--sans);font-size:13.5px;font-weight:600;
  padding:7px 12px;border-radius:8px;border:1px solid var(--rule);
  background:#fff;color:var(--ink);cursor:pointer;min-width:220px;}
.toggle{
  display:flex;gap:0;padding:14px 16px 0;
}
.tg{
  font-family:var(--sans);font-size:14px;font-weight:600;
  padding:9px 20px;cursor:pointer;border:1px solid var(--rule);
  background:#fff;color:var(--ink-soft);
}
.tg:first-child{border-radius:8px 0 0 8px}
.tg:last-child{border-radius:0 8px 8px 0;border-left:none}
.tg.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.frame-holder{
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}
.frame-holder iframe{
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.frame-ph{
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  color:var(--ink-faint);font-family:var(--sans);font-size:13px;
}
.loadbtn{
  font-family:var(--sans);font-size:15px;font-weight:600;
  padding:13px 26px;border-radius:999px;cursor:pointer;
  border:1px solid var(--accent);background:#fff;color:var(--accent);
  transition:all .14s ease;
}
.loadbtn:hover{background:var(--accent);color:#fff}
.demo-cap{padding:16px 20px 20px;margin:0;max-width:none;text-align:left}

/* ---------- bibtex ---------- */
.bib{
  background:var(--ink);color:#f3f1ea;border-radius:12px;
  padding:22px 24px;overflow-x:auto;font-family:var(--mono);
  font-size:13.5px;line-height:1.6;
}
.bib code{font-family:inherit}

/* ---------- footer ---------- */
footer{padding:46px 0 64px;background:var(--bg-alt)}
footer p{margin:0 0 6px;font-family:var(--sans);font-size:14px;color:var(--ink-soft)}
footer .muted{color:var(--ink-faint);font-size:13px}

/* ---------- steering playground ---------- */
/* wide breakout — the steering widget is much wider than the prose column */
.pg{margin:34px 0 8px;border:1px solid var(--rule);border-radius:16px;
  background:#fff;overflow:hidden;
  max-width:1280px;
  margin-left:calc((var(--maxw) - 1280px)/2);
  margin-right:calc((var(--maxw) - 1280px)/2)}
@media (max-width:1340px){
  .pg{max-width:100%;margin-left:0;margin-right:0}
}
/* three panes: trace (left) | 3D viewer (mid) | controls (right of viewer).
   Fixed row height so the long trace SCROLLS in its pane and the 3D canvas
   stays a sane size (it was ballooning to follow the trace height). */
.pg-main{display:flex;height:660px}
.pg-left{flex:1;min-width:420px;display:flex;flex-direction:column;
  border-right:1px solid var(--rule);overflow:hidden}
.pg-mid{flex:0 0 420px;display:flex;flex-direction:column;overflow:hidden;
  border-right:1px solid var(--rule);background:#fff}
.pg-side{flex:0 0 240px;display:flex;flex-direction:column;
  overflow:auto;background:var(--bg-alt)}
@media (max-width:1080px){
  .pg-main{flex-direction:column;height:auto}
  .pg-left,.pg-mid,.pg-side{flex:1 1 auto;border-right:none;
    border-bottom:1px solid var(--rule)}
  .pg-left{height:460px}
  .pg-mid{height:420px}
  .pg-side{height:auto}
}
.pg-controls{padding:16px 16px;display:flex;flex-direction:column;gap:13px}
.pg-row{display:flex;align-items:flex-start;gap:8px;flex-wrap:wrap;
  flex-direction:column}
.pg-lab{font-family:var(--sans);font-size:11px;font-weight:700;
  color:var(--ink-soft);letter-spacing:.06em;text-transform:uppercase}
.pg-select{font-family:var(--sans);font-size:12.5px;font-weight:600;
  padding:6px 8px;border-radius:8px;border:1px solid var(--rule);
  background:#fff;color:var(--ink);width:100%;cursor:pointer}
/* Steering top bar: collapse the stacked "Prompt / select" layout into the
   compact mental-state "CHOOSE SAMPLE  [select]" row (label beside select,
   select sized to content). */
.pg-topbar .pg-row{flex-direction:row;align-items:center;gap:10px;
  flex-wrap:nowrap;padding:0;border:none;background:transparent}
.pg-topbar .pg-select{width:auto;min-width:220px;font-size:13.5px;
  padding:7px 12px}
.pg-ov{font-family:var(--sans);font-size:11.5px;color:var(--ink-soft);
  display:flex;align-items:center;gap:5px;cursor:pointer;
  padding:0 16px 14px}
/* compact square buttons (Target / Duration / Projection) */
.pg-sqgrid{display:flex;gap:5px;flex-wrap:wrap}
.pg-sq{font-family:var(--mono);font-size:12px;font-weight:700;
  min-width:38px;padding:7px 8px;border-radius:7px;cursor:pointer;
  border:1px solid var(--rule);background:#fff;color:var(--ink-soft);
  transition:all .12s ease;text-align:center}
.pg-sq:hover{border-color:var(--ink);transform:translateY(-1px)}
.pg-sq.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.pg-sq.toward.active{background:#1f7a3d;border-color:#1f7a3d}
.pg-sq.avoid.active{background:var(--accent);border-color:var(--accent)}
/* three vertical sliders, side by side, inside the narrow control strip */
.pg-vsliders{display:flex;gap:8px;justify-content:space-between;
  padding:4px 2px 2px}
.pg-vs{display:flex;flex-direction:column;align-items:center;gap:7px;flex:1}
.pg-vlab{font-family:var(--sans);font-size:10px;font-weight:700;
  letter-spacing:.03em;text-transform:uppercase;color:var(--ink-soft);
  white-space:nowrap}
.pg-vrange{-webkit-appearance:slider-vertical;appearance:slider-vertical;
  writing-mode:vertical-lr;direction:rtl;width:20px;height:210px;
  accent-color:var(--accent);cursor:pointer}
.pg-vval{font-family:var(--mono);font-size:10.5px;font-weight:700;
  color:var(--accent);text-align:center;white-space:nowrap}
/* hover tooltip */
.pg-tip{position:fixed;z-index:1000;max-width:300px;pointer-events:none;
  background:#1d1c1a;color:#f3f1ea;font-family:var(--sans);font-size:12px;
  line-height:1.45;padding:9px 12px;border-radius:8px;
  box-shadow:0 6px 20px rgba(0,0,0,.22)}
.pg-tip b{color:#fff}
.pg-tip span{color:#c9c6bd}
.pg-ctx{color:var(--ink-faint);background:#f4f2ec;border-radius:2px}
.pg-div{display:block;margin:8px 0 6px;font-family:var(--sans);font-size:11px;
  font-weight:700;letter-spacing:.06em;text-transform:uppercase;
  color:var(--ink-faint)}
.pg-desc{font-family:var(--sans);font-size:12px;line-height:1.5;
  color:var(--ink-faint);padding:12px 16px;margin:0;
  border-top:1px solid var(--rule);flex:1;overflow:auto}
/* matches the mental-state interactive trace look */
/* mental-state recipe: container at font-size:0 kills any inter-span html
   whitespace so colored highlights hug the text cleanly; each .pg-tok then
   re-asserts the real font-size + pre-wrap so token-internal spaces still
   render. No word-break — let monospace lines wrap naturally. */
.pg-text{flex:1;overflow:auto;min-height:240px;padding:14px 16px;
  font-family:"Courier New",monospace;font-size:0;line-height:1.8;
  white-space:pre-wrap}
.pg-tok{font-size:13px;border-radius:2px;padding:1px 0;
  white-space:pre-wrap;cursor:pointer}
/* container is font-size:0 (kills HTML whitespace); restore the real size
   on non-token children so the prompt-ctx fallback, the GENERATION
   separator, and the "Loading" message stay readable. .pg-div keeps its
   own 11px (small uppercase tag); the others get 13px. */
.pg-ctx,.pg-msg{font-size:13px}
.pg-tok-gen{cursor:pointer}
.pg-tok.is-current{outline:3px solid #ffe000;outline-offset:1px;
  border-radius:3px}
.pg-tok[data-st="1"]{border-bottom:2px solid #b0122a;
  box-shadow:inset 0 -3px 0 -1px rgba(0,0,0,.35)}
.pg-answer{font-family:var(--sans);font-size:14px;padding:13px 16px;
  border-top:1px solid var(--rule);background:var(--bg-alt);color:var(--ink)}
.pg-answer b{color:var(--accent)}
.pg-msg{font-family:var(--sans);font-size:13px;color:var(--ink-faint);
  padding:24px;text-align:center}
.ret3d-cap{font:12.5px/1.5 var(--sans);color:var(--ink-faint);padding:8px 12px 4px}
.ret3d-cap b{color:var(--ink)}
.ret3d-canvas{flex:1;width:100%;min-height:340px;display:block;background:#fff;
  cursor:grab;touch-action:none}
.ret3d-canvas:active{cursor:grabbing}
.ret3d-hint{font:11px/1.4 var(--mono);color:var(--ink-faint);
  padding:2px 12px 10px;display:flex;gap:14px;flex-wrap:wrap}
.ret3d-hint i{font-style:normal}
/* mental-state-style inline scrub row: label · play · slider · value all
   on ONE line (matches the demos' .ret3d-scrub) */
.ret3d-scrub{display:flex;align-items:center;gap:9px;padding:5px 12px 3px}
.ret3d-scrub-lab{font:9.5px/1 var(--sans);font-weight:700;
  letter-spacing:.05em;text-transform:uppercase;color:var(--ink-soft);
  white-space:nowrap}
.ret3d-scrub input[type=range]{flex:1;min-width:80px;height:15px;
  accent-color:var(--accent);cursor:pointer}
.ret3d-scrub-val{font:10.5px/1 var(--mono);font-weight:700;color:var(--accent);
  white-space:nowrap;text-align:right;min-width:62px}
/* pill toggle (mental-state look): play/pause + projection switch */
.ret3d-tg{font:11px/1 var(--sans);font-weight:600;
  padding:3px 9px;border-radius:999px;border:1px solid #ddd;
  background:#fff;color:#555;cursor:pointer;flex:0 0 auto}
.ret3d-tg:hover{background:var(--bg-alt)}
.ret3d-tg.active{background:var(--ink);color:#fff;border-color:var(--ink)}
/* "global  UMAP / PCA  space" projection toggle */
.ret3d-mode{display:inline-flex;align-items:center;gap:6px;
  font:11px/1.4 var(--mono);color:var(--ink-faint)}
.ret3d-mode-lab{font-style:italic;color:var(--ink-faint)}
/* compact single-row footer (3D view toggle + overlay checkbox), same
   visual feel as the mental-state demos' .ret3d-foot */
.ret3d-bar{display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  padding:6px 12px 8px}
.ret3d-bar .pg-lab{font-family:var(--sans);font-size:10.5px;font-weight:700;
  letter-spacing:.04em;text-transform:uppercase;color:var(--ink-soft);
  margin-right:4px}
.ret3d-bar .pg-row{display:inline-flex;align-items:center;gap:6px;
  margin:0;padding:0}
.ret3d-bar .pg-ov{display:inline-flex;align-items:center;gap:6px;
  padding:0;margin:0;line-height:1;
  font-family:var(--sans);font-size:11.5px;color:var(--ink-soft)}

/* ---------- scroll reveal ---------- */
.reveal{opacity:0;transform:translateY(22px);
  transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
}