@import url("./public-tokens.css");

:root {
  --rs-blue: var(--os-blue);
  --rs-ground: var(--os-ground);
  --rs-ink: var(--os-ink);
  --rs-graphite: #5B6068;
  --rs-muted: #8A8F98;
  --rs-line: #E2E3E0;
  --rs-line-strong: #C9CBC6;
  --rs-panel: #FFFFFF;
  --rs-radius: 10px;
  --rs-radius-sm: 6px;
  --rs-max: 1280px;
  --rs-gap: 24px;
  --rs-font-body: "Inter 5D", var(--os-font-body, Inter, system-ui, sans-serif);
  --rs-font-mono: var(--os-font-mono, ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace);
}

.research-body {
  margin: 0;
  background: var(--rs-ground);
  color: var(--rs-ink);
  font-family: var(--rs-font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.research-body *,
.research-body *::before,
.research-body *::after { box-sizing: border-box; }

.mono { font-family: var(--rs-font-mono); font-feature-settings: "tnum" 1; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--rs-blue); color: #fff; padding: 10px 14px; z-index: 100;
  border-radius: 0 0 var(--rs-radius-sm) 0;
}
.skip-link:focus { left: 0; }

/* Nav */
.site-nav {
  position: sticky; top: 0; z-index: 40;
  background: rgba(244,244,242,0.88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rs-line);
}
.site-nav__inner {
  max-width: var(--rs-max); margin: 0 auto;
  padding: 14px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.wordmark {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--rs-ink); text-decoration: none; font-weight: 600; letter-spacing: -0.01em;
}
.wordmark__mark { color: var(--rs-blue); display: inline-flex; }
.wordmark__sep { color: var(--rs-muted); font-weight: 400; }
.site-nav__links { display: flex; gap: 20px; }
.site-nav__links a {
  color: var(--rs-graphite); text-decoration: none; font-size: 14px;
  padding: 4px 0; border-bottom: 1px solid transparent;
}
.site-nav__links a:hover, .site-nav__links a:focus-visible { color: var(--rs-blue); border-bottom-color: var(--rs-blue); }

/* Layout */
.research-main { max-width: var(--rs-max); margin: 0 auto; padding: 0 24px 96px; }

.eyebrow {
  font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--rs-graphite); margin: 0 0 12px;
}

/* Hero */
.hero { padding: 52px 0 28px; }
.hero__grid {
  display: grid; grid-template-columns: minmax(0, 1fr) 220px;
  gap: 48px; align-items: end;
}
.hero__title {
  font-size: 64px; line-height: 1.02; letter-spacing: -0.03em;
  margin: 0 0 24px; font-weight: 600;
}
.hero__title-line { display: block; }
.hero__title-line--muted { color: var(--rs-graphite); }
.hero__summary { max-width: 560px; font-size: 17px; color: var(--rs-graphite); margin: 0 0 28px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font: inherit; font-size: 14px; font-weight: 500;
  padding: 10px 16px; border-radius: var(--rs-radius-sm);
  border: 1px solid var(--rs-line-strong); background: var(--rs-panel); color: var(--rs-ink);
  cursor: pointer; text-decoration: none; transition: background 120ms ease, border-color 120ms ease;
}
.btn:hover, .btn:focus-visible { border-color: var(--rs-blue); color: var(--rs-blue); }
.btn--primary { background: var(--rs-blue); border-color: var(--rs-blue); color: #fff; }
.btn--primary:hover, .btn--primary:focus-visible { background: var(--rs-panel); border-color: var(--rs-blue); color: var(--rs-blue); }
.btn--ghost { background: transparent; }

.hero__metric {
  border-left: 2px solid var(--rs-blue); padding: 4px 0 4px 16px;
}
.hero__metric-label { font-size: 11px; letter-spacing: 0.14em; color: var(--rs-muted); margin: 0 0 6px; }
.hero__metric-value { font-size: 40px; font-weight: 600; letter-spacing: -0.02em; margin: 0; line-height: 1; }
.hero__metric-note { font-size: 12px; color: var(--rs-muted); margin: 8px 0 0; }

/* Stage */
.stage { padding: 24px 0; }
.stage__head { margin-bottom: 20px; }
.stage__title { font-size: 28px; letter-spacing: -0.02em; margin: 0 0 6px; font-weight: 600; }
.stage__hint { font-size: 13px; color: var(--rs-muted); margin: 0; min-height: 18px; }

.depth-dial {
  display: inline-flex; gap: 0; margin: 0 0 16px;
  border: 1px solid var(--rs-line-strong); border-radius: var(--rs-radius-sm);
  overflow: hidden; background: var(--rs-panel);
}
.depth-btn {
  display: inline-flex; flex-direction: column; align-items: flex-start; gap: 2px;
  padding: 8px 14px; border: 0; border-right: 1px solid var(--rs-line);
  background: transparent; color: var(--rs-graphite); cursor: pointer; font: inherit;
  min-width: 0;
}
.depth-btn:last-child { border-right: 0; }
.depth-btn__angle { font-size: 11px; color: var(--rs-muted); }
.depth-btn__label { font-size: 13px; font-weight: 500; }
.depth-btn[aria-checked="true"] { background: var(--rs-blue); color: #fff; }
.depth-btn[aria-checked="true"] .depth-btn__angle { color: rgba(255,255,255,0.75); }
.depth-btn:focus-visible { outline: 2px solid var(--rs-blue); outline-offset: -2px; }

.graph-stage { position: relative; }
.graph-stage__frame {
  border: 1px solid var(--rs-line); border-radius: var(--rs-radius);
  background: var(--rs-panel); overflow: hidden;
  min-height: 420px;
}
.graph-host { width: 100%; min-height: 420px; position: relative; }
.graph-host canvas { display: block; width: 100%; height: 100%; }
.graph-stage__annotation {
  font-size: 11px; color: var(--rs-muted); margin: 8px 0 0;
}
.graph-stage__annotation--right { position: absolute; right: 0; bottom: -22px; }

/* Papers */
.papers { padding: 64px 0 24px; }
.papers__head { margin-bottom: 24px; }
.papers__title { font-size: 28px; letter-spacing: -0.02em; margin: 0; font-weight: 600; }
.papers__layout {
  display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 32px;
}
.index-rail__list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.index-item {
  display: block; width: 100%; text-align: left; font: inherit;
  padding: 10px 12px; border: 1px solid transparent; border-radius: var(--rs-radius-sm);
  background: transparent; color: var(--rs-graphite); cursor: pointer;
}
.index-item:hover, .index-item:focus-visible { background: var(--rs-panel); border-color: var(--rs-line); color: var(--rs-ink); }
.index-item[aria-current="true"] { background: var(--rs-panel); border-color: var(--rs-blue); color: var(--rs-ink); }
.index-item__num { font-size: 11px; color: var(--rs-muted); display: block; }
.index-item__title { font-size: 14px; font-weight: 500; }

.paper-panel { min-width: 0; }
.paper-panel__label { font-size: 12px; color: var(--rs-blue); letter-spacing: 0.08em; margin: 0 0 8px; }
.paper-panel__title { font-size: 24px; letter-spacing: -0.02em; margin: 0 0 12px; font-weight: 600; }
.paper-panel__summary { color: var(--rs-graphite); margin: 0 0 12px; max-width: 640px; }
.paper-panel__metric { font-size: 14px; margin: 0 0 20px; }
.paper-panel__metric-key { color: var(--rs-muted); font-size: 12px; margin-right: 6px; }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--rs-line); margin-bottom: 20px; }
.tab {
  font: inherit; font-size: 14px; padding: 8px 14px; border: 0; background: transparent;
  color: var(--rs-graphite); cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -1px;
}
.tab[aria-selected="true"] { color: var(--rs-blue); border-bottom-color: var(--rs-blue); font-weight: 500; }
.tab:focus-visible { outline: 2px solid var(--rs-blue); outline-offset: -2px; }

.tab-panel { min-width: 0; }
.provenance { background: var(--rs-panel); border: 1px solid var(--rs-line); border-radius: var(--rs-radius-sm); padding: 16px; margin-bottom: 16px; }
.provenance__row { margin: 0 0 8px; font-size: 14px; color: var(--rs-graphite); }
.provenance__row:last-child { margin-bottom: 0; }
.provenance__key { color: var(--rs-muted); font-size: 12px; margin-right: 8px; }
.paper-links { display: flex; flex-wrap: wrap; gap: 12px; }
.paper-links a { color: var(--rs-blue); text-decoration: none; font-size: 14px; }
.paper-links a:hover, .paper-links a:focus-visible { text-decoration: underline; }

.proof { min-width: 0; }
.proof-card { background: var(--rs-panel); border: 1px solid var(--rs-line); border-radius: var(--rs-radius-sm); padding: 18px; margin-bottom: 16px; }
.proof-card h4 { margin: 0 0 12px; font-size: 15px; font-weight: 600; }
.proof-row { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; margin-bottom: 12px; }
.proof-row label { font-size: 13px; color: var(--rs-graphite); display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.proof-row input[type="range"] { width: 180px; max-width: 100%; accent-color: var(--rs-blue); }
.proof-row input[type="number"] { width: 110px; padding: 6px 8px; border: 1px solid var(--rs-line-strong); border-radius: var(--rs-radius-sm); font: inherit; font-family: var(--rs-font-mono); }
.proof-out { font-family: var(--rs-font-mono); font-size: 14px; color: var(--rs-ink); }
.proof-note { font-size: 12px; color: var(--rs-muted); margin: 8px 0 0; }
.hex-grid { display: grid; grid-template-columns: repeat(8, minmax(0, 1fr)); gap: 4px; margin-top: 12px; }
.hex-cell { font-family: var(--rs-font-mono); font-size: 12px; text-align: center; padding: 6px 0; background: var(--rs-ground); border: 1px solid var(--rs-line); border-radius: 4px; }
.proof-toggle { display: inline-flex; gap: 8px; align-items: center; font-size: 13px; color: var(--rs-graphite); }

.manuscript-wrap { min-width: 0; }
.manuscript-frame { width: 100%; min-width: 0; border: 1px solid var(--rs-line); border-radius: var(--rs-radius-sm); background: var(--rs-panel); }
.manuscript-fallback { font-size: 13px; margin: 8px 0 0; }
.manuscript-fallback a { color: var(--rs-blue); }

/* Arena */
.arena { padding: 64px 0 24px; }
.arena__head { margin-bottom: 24px; }
.arena__title { font-size: 28px; letter-spacing: -0.02em; margin: 0 0 10px; font-weight: 600; }
.arena__desc { color: var(--rs-graphite); max-width: 680px; margin: 0; }
.arena__host { min-width: 0; }
.methodology { margin-top: 16px; font-size: 14px; color: var(--rs-graphite); }
.methodology summary { cursor: pointer; color: var(--rs-blue); }

/* Enterprise */
.enterprise { padding: 64px 0 24px; }
.enterprise__head { margin-bottom: 24px; }
.enterprise__title { font-size: 28px; letter-spacing: -0.02em; margin: 0 0 8px; font-weight: 600; }
.enterprise__lead { font-size: 15px; color: var(--rs-blue); font-weight: 500; margin: 0; }
.enterprise__grid { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 32px; }
.enterprise__equation { background: var(--rs-panel); border: 1px solid var(--rs-line); border-radius: var(--rs-radius); padding: 20px; min-width: 0; }
.eq { font-size: 13px; color: var(--rs-graphite); margin: 0 0 16px; overflow-wrap: anywhere; }
.eq-values { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 12px; margin: 0 0 16px; }
.eq-values div { min-width: 0; }
.eq-values dt { font-size: 11px; color: var(--rs-muted); margin-bottom: 2px; }
.eq-values dd { margin: 0; font-size: 16px; font-weight: 500; }
.eq-note { font-size: 13px; color: var(--rs-graphite); margin: 0; }
.assumptions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; align-content: start; }
.assumption { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.assumption label { font-size: 12px; color: var(--rs-graphite); }
.assumption input { padding: 8px 10px; border: 1px solid var(--rs-line-strong); border-radius: var(--rs-radius-sm); font: inherit; font-family: var(--rs-font-mono); font-size: 14px; min-width: 0; }
.assumption input:focus-visible { outline: 2px solid var(--rs-blue); outline-offset: 1px; border-color: var(--rs-blue); }
.enterprise__footnote { font-size: 12px; color: var(--rs-muted); margin: 20px 0 0; max-width: 720px; }

/* Footer */
.site-foot { border-top: 1px solid var(--rs-line); padding: 24px; text-align: center; font-size: 13px; color: var(--rs-muted); }
.site-foot a { color: var(--rs-blue); text-decoration: none; }
.site-foot a:hover { text-decoration: underline; }

.app-error { max-width: var(--rs-max); margin: 16px auto; padding: 14px 18px; background: var(--rs-panel); border: 1px solid var(--rs-blue); color: var(--rs-ink); border-radius: var(--rs-radius-sm); font-size: 14px; }

/* Responsive */
@media (max-width: 900px) {
  .hero__grid { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .hero__title { font-size: 48px; }
  .papers__layout { grid-template-columns: minmax(0, 1fr); }
  .enterprise__grid { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 640px) {
  .research-main { padding: 0 16px 64px; }
  .site-nav__inner { padding: 12px 16px; }
  .hero { padding: 40px 0 24px; }
  .hero__title { font-size: 40px; }
  .hero__metric-value { font-size: 32px; }
  .depth-dial { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); width: 100%; }
  .depth-btn { border-right: 1px solid var(--rs-line); border-bottom: 1px solid var(--rs-line); }
  .depth-btn:nth-child(2n) { border-right: 0; }
  .depth-btn:nth-child(n+3) { border-bottom: 0; }
  .assumptions { grid-template-columns: minmax(0, 1fr); }
  .hex-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .proof-row input[type="range"] { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* The paper stage is a focusable document object; controls stay in the reader plane. */
section[id]{scroll-margin-top:80px} .graph-stage__annotation--right{position:static;text-align:right;margin-top:-18px} @media(max-width:640px){.graph-stage__annotation--right{margin-top:4px;text-align:left}}

@media(max-width:640px){.graph-stage__frame,.graph-host{min-height:400px}.site-nav__links{gap:14px}.wordmark__text{font-size:14px}.stage__title,.papers__title,.arena__title,.enterprise__title{line-height:1.25}.index-rail__list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px}.index-item{height:100%;padding:10px}.index-rail__list>li:first-child{grid-column:1/-1}.index-item__title{font-size:13px}.papers__layout{gap:24px}}

.paper-panel>.paper-links{margin-bottom:20px}.depth-btn:disabled{opacity:.4;cursor:default}


/* Honest public run counters — never demo/fake */
.fleet{margin:0 0 48px;padding:0 24px}
.fleet__inner{max-width:1100px;margin:0 auto;padding:22px 24px;border:1px solid var(--os-rule,rgba(20,19,18,.12));border-radius:14px;background:var(--os-paper,#fff)}
.fleet__head{margin:0 0 16px}
.fleet__title{font-size:20px;letter-spacing:-.02em;margin:4px 0 8px;font-weight:600}
.fleet__note{font-size:13px;color:var(--os-muted,#8A8F98);margin:0;max-width:62ch}
.fleet__grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:0}
.fleet__item{margin:0;padding:14px 16px;border-radius:10px;background:var(--os-ground,#F6F5F3)}
.fleet__item dt{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--os-muted,#8A8F98);margin:0 0 6px}
.fleet__item dd{font-size:28px;font-weight:600;letter-spacing:-.02em;margin:0;font-variant-numeric:tabular-nums;font-family:var(--os-font-mono,ui-monospace,monospace)}
@media(max-width:640px){.fleet{padding:0 16px;margin-bottom:32px}.fleet__grid{grid-template-columns:1fr}.fleet__item dd{font-size:24px}}

/* The two audiences share one experiment and one result. Primary Stage + Tool Rail. */
[data-audience=human] .developer-only,[data-audience=developer] .human-only{display:none!important}
.research-body{--rs-graphite:var(--os-muted);--rs-muted:var(--os-muted);--rs-line:var(--os-rule)}
.audience-switch{display:flex;gap:3px;padding:3px;border:1px solid var(--os-rule);border-radius:var(--os-radius-pill);background:var(--os-ground)}
.audience-switch button{min-height:40px;border:0;border-radius:var(--os-radius-pill);padding:8px 15px;font:500 13px var(--os-font-body);color:var(--os-muted);background:transparent;cursor:pointer}
.audience-switch button[aria-pressed=true]{background:var(--os-ink);color:var(--os-ground)}
.audience-switch button:focus-visible{outline:2px solid var(--os-blue);outline-offset:2px}
#arena{padding-top:40px}
#arena .arena__title{font-size:clamp(42px,5.3vw,72px);line-height:1.02;letter-spacing:-.05em;max-width:820px;margin-bottom:22px}
#arena .arena__title span{color:var(--os-blue)}
.arena__desc{font-size:17px;line-height:1.65;max-width:680px}
.experiment-brief{display:flex;justify-content:space-between;align-items:baseline;gap:24px;margin:28px 0 16px;border-top:1px solid var(--os-rule);padding-top:20px;font-size:13px}
.experiment-brief span{font-weight:600}.experiment-brief b{font:12px var(--os-font-mono);color:var(--os-blue);margin-right:12px}.experiment-brief p{max-width:500px;margin:0;color:var(--os-muted)}
.lab-section{padding:64px 0 32px;border-top:1px solid var(--os-rule);margin-top:28px}
.lab-heading{max-width:730px}.lab-heading h2{font-size:clamp(30px,4vw,48px);font-weight:550;letter-spacing:-.035em;line-height:1.12;margin:0 0 18px}.lab-heading>p:not(.eyebrow){color:var(--os-muted);font-size:16px;line-height:1.65;margin:0 0 20px}
.lab-caveat{max-width:760px;color:var(--os-muted);font-size:13px;line-height:1.7;margin-top:20px}
.explanation-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px;margin:32px 0 0}.explanation-grid article{border-top:1px solid var(--os-rule);padding-top:20px}.explanation-number{font-size:11px;color:var(--os-muted)}.explanation-grid h3{font-size:21px;letter-spacing:-.025em;line-height:1.25;font-weight:550;margin:16px 0 10px}.explanation-grid p{font-size:14px;line-height:1.7;color:var(--os-muted);margin:0}
.research-invitation{display:flex;justify-content:space-between;gap:20px;align-items:center;border-top:1px solid var(--os-rule);padding-top:24px}.reading-link{font-size:14px;color:var(--os-muted);margin:0}.reading-link a{color:var(--os-blue)}
[data-audience=human] .research-detail-section{padding:16px 0}
.research-main .fleet{padding:24px 0;margin:32px 0}.research-main .fleet__grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.graph-stage__annotation{line-height:1.5}.graph-stage__frame .rg-legend{bottom:6px}
@media(max-width:640px){
.site-nav__inner{padding:10px 16px;gap:10px;flex-wrap:wrap}.wordmark__text{font-size:13px}.audience-switch{margin-left:auto}.audience-switch button{font-size:12px;padding:7px 10px;min-height:38px}
.research-main{padding:0 16px 56px}#arena{padding-top:28px}#arena .arena__title{font-size:42px;margin-bottom:16px}.arena__desc{font-size:15px;line-height:1.55}.arena__head{margin-bottom:20px}.experiment-brief{display:block;margin-top:22px;padding-top:16px}.experiment-brief p{margin-top:8px;font-size:12px}
.lab-section{padding:40px 0 24px;margin-top:16px}.lab-heading>p:not(.eyebrow){font-size:14px}.explanation-grid{grid-template-columns:1fr;gap:24px}.explanation-grid h3{margin-top:10px}.research-invitation{display:block}.research-invitation .btn{margin-top:4px}.research-main .fleet__inner{padding:18px 12px}.research-main .fleet__grid{gap:8px}.research-main .fleet__item{padding:12px 8px}.research-main .fleet__item dt{font-size:10px}.research-main .fleet__item dd{font-size:24px}
}
@media(max-width:360px){.site-nav__inner{justify-content:center}.audience-switch{margin:0}.wordmark{width:100%;justify-content:center}}

@media(min-width:900px){#arena .arena__head{display:grid;grid-template-columns:1fr 1fr;column-gap:48px;align-items:end}#arena .arena__head .eyebrow{grid-column:1/-1}#arena .arena__title{margin:0}#arena .arena__desc{font-size:16px;padding-bottom:4px}.arena__host .arena-canvas{width:min(100%,340px);margin:auto}.arena__host .arena-chamber{padding:16px 20px}.experiment-brief{margin-top:24px}}