@font-face{font-family:Instrument;src:url('../../assets/fonts/instrument-sans-latin-400-normal.woff2') format('woff2');font-display:swap}
@font-face{font-family:Instrument;src:url('../../assets/fonts/instrument-sans-latin-600-normal.woff2') format('woff2');font-weight:600;font-display:swap}
@font-face{font-family:Anybody;src:url('../../assets/fonts/anybody-var.woff2') format('woff2');font-weight:100 900;font-display:swap}
@font-face{font-family:JetBrains;src:url('../../assets/fonts/jetbrains-mono-latin-400-normal.woff2') format('woff2');font-display:swap}

:root{--app-accent:#ff8a1f;--accent-text:#ff9d43;--bg:#0b1015;--panel:#111920;--raised:#1d2832;--line:#2b3741;--fg:#ecf0f2;--muted:#a3afb9;--mean:#62d9ef;--good:#5fd39a;--font:Instrument,system-ui,sans-serif;--display:Anybody,system-ui,sans-serif;--mono:JetBrains,ui-monospace,monospace;--stage:#0a0e13}
:root[data-theme=light]{--bg:#f4f2ee;--panel:#fff;--raised:#eeeae4;--line:#d8d3cb;--fg:#1b2933;--muted:#5c6870;--accent-text:#a64c00;--mean:#08798d;--good:#167a4a;--stage:#f7f5f1}
body{font-family:var(--font);font-size:15px}
button{touch-action:manipulation}
button.primary,button.primary[aria-pressed=true]{background:var(--app-accent);color:#241204;border-color:var(--app-accent)}button.primary:hover{background:#ffa24b}
button[aria-pressed=true]{border-color:var(--app-accent);background:color-mix(in srgb,var(--app-accent) 11%,var(--panel))}
button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,canvas:focus-visible,a:focus-visible{outline:2px solid var(--app-accent);outline-offset:3px}
input[type=range]{accent-color:var(--app-accent)}output{color:var(--accent-text)}
:root[data-theme=light] output,:root[data-theme=light] .eyebrow{color:var(--accent-text)}

.app-header{max-width:none;padding:12px max(24px,calc((100vw - 1400px)/2));min-height:70px}
.app-header strong{font-size:12px;letter-spacing:.13em}.app-header strong span{margin-left:12px;color:var(--muted);font:10px var(--mono);letter-spacing:.1em}
.app-header a:before{color:var(--app-accent)}
.app-main{max-width:1440px;padding:38px 24px 28px}
.eyebrow{font:10px var(--mono);color:var(--accent-text);letter-spacing:.11em;margin-bottom:10px}

/* hero */
.intro{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:0 0 32px}
.intro h1{font:650 clamp(36px,4.8vw,65px)/1.05 var(--display);letter-spacing:-.045em}.intro h1 span{color:var(--accent-text)}
.intro-note{display:flex;align-items:center;gap:26px;max-width:470px}.intro-note p{color:var(--muted);font-size:14px;line-height:1.7}
.intro-glyph{display:flex;gap:9px;align-items:flex-end;height:96px;flex:none}
.intro-glyph i{display:block;width:9px;border-radius:9px;background:linear-gradient(to top,var(--app-accent),color-mix(in srgb,var(--app-accent) 55%,#f0f921) 55%,transparent);height:70%;transform:skewX(-12deg)}
.intro-glyph i:nth-child(2){height:100%}.intro-glyph i:nth-child(3){height:58%}

/* question cards */
.presets{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-bottom:20px}
.presets button{text-align:left;min-width:0;padding:15px 17px;background:var(--panel);border-radius:12px;position:relative;font-weight:400}
.presets button[aria-pressed=true]:after{content:'';position:absolute;inset:auto 17px -1px;height:3px;background:var(--app-accent);border-radius:3px}
.presets span{display:block;font:9px var(--mono);color:var(--accent-text);letter-spacing:.06em;margin-bottom:9px}
.presets strong{font-size:17px;display:block;line-height:1.3;font-weight:600}
.presets small{display:block;margin-top:5px;font-size:12px;line-height:1.5;color:var(--muted)}

/* workbench */
.bench{border:1px solid var(--line);border-radius:17px;overflow:hidden;background:var(--panel);scroll-margin-top:12px}
.bench-toolbar{padding:12px 18px;display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.tabs{padding:4px;border:1px solid var(--line);border-radius:11px;background:var(--bg);flex-wrap:nowrap}
.tabs button{background:transparent;border-color:transparent;white-space:nowrap}
.tabs button[aria-pressed=true]{background:var(--app-accent);color:#251406;font-weight:600}
.bench-actions{display:flex;gap:8px;flex-wrap:wrap}.bench-actions button{font-size:12px}
.bench-actions button[aria-pressed=true]:before{content:'';display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--app-accent);margin-right:8px;vertical-align:1px}
.bench-actions button[aria-pressed=false]:before{content:'';display:inline-block;width:7px;height:7px;border-radius:50%;border:1px solid var(--muted);margin-right:8px;vertical-align:0;box-sizing:border-box}
.bench-body{display:grid;grid-template-columns:minmax(0,1fr) 320px}
.stage{min-width:0;border-right:1px solid var(--line)}
.plot-head{display:flex;justify-content:space-between;gap:18px;align-items:flex-end;padding:22px 24px 6px}
.plot-head h2{font:600 22px var(--font);letter-spacing:-.03em}.plot-head .eyebrow{display:block;margin-bottom:7px}
.plot-hint{font-size:12px;color:var(--muted);max-width:330px;text-align:right;line-height:1.5}
.canvas-wrap{position:relative;height:520px;background:var(--panel)}
#field{width:100%;height:100%;display:block;touch-action:none;cursor:crosshair;border-radius:4px}
#field.probing{cursor:help;touch-action:pan-y}
.probe-chip{position:absolute;left:0;top:0;pointer-events:none;background:color-mix(in srgb,var(--bg) 88%,transparent);border:1px solid var(--line);border-radius:9px;padding:6px 10px;opacity:0;transition:opacity .12s;white-space:nowrap}
.probe-chip.show{opacity:1}.probe-chip span{display:block;font:9px var(--mono);color:var(--muted);letter-spacing:.08em}.probe-chip strong{display:block;font:15px var(--mono);color:var(--fg)}

.transport{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:15px 20px;border-top:1px solid var(--line);background:color-mix(in srgb,var(--bg) 40%,var(--panel))}
.transport-buttons{display:flex;gap:7px;flex-wrap:wrap}.transport-buttons button{font-size:12px}.transport-buttons .primary{min-width:88px}
.time-controls{display:flex;align-items:center;gap:16px}.time-controls label{display:flex;align-items:center;gap:8px;font-size:11px}
.time-controls select{width:auto;min-width:80px}.clock{min-width:98px;text-align:right}.clock small{display:block;font:8px var(--mono);color:var(--muted);margin-bottom:5px;letter-spacing:.1em}.clock output{font:15px var(--mono);font-variant-numeric:tabular-nums}

.readings{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid var(--line)}
.readings>div{padding:16px 22px;border-right:1px solid var(--line);min-width:0}.readings>div:last-child{border:0}
.readings span,.readings small{display:block;color:var(--muted);font-size:11px}.readings strong{display:block;font:25px var(--mono);letter-spacing:-.05em;margin:4px 0 2px;font-variant-numeric:tabular-nums;font-weight:400}
.readings .accent-reading strong{color:var(--accent-text)}

/* control rail */
.rail{min-width:0;display:flex;flex-direction:column}
.rail-group{padding:18px 22px;border-bottom:1px solid var(--line)}.rail-group:last-child{border-bottom:0}
.rail-group .eyebrow{margin-bottom:10px}
.range-row{display:flex;justify-content:space-between;align-items:center;gap:10px}.range-row label{color:var(--fg);font-size:13px}.range-row output{font-size:13px}
.range-labels{display:flex;justify-content:space-between;font:9px var(--mono);color:var(--muted);margin-top:-6px}
.fine{font-size:11px;color:var(--muted);line-height:1.55;margin-top:6px}
.switch-row{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:4px}.switch-row .eyebrow{margin:0}
.switch{display:inline-flex;align-items:center;gap:10px;cursor:pointer;color:var(--fg);font-size:12px;min-height:44px;position:relative}
.switch input{position:absolute;opacity:0;width:44px;height:26px;right:0;margin:0;cursor:pointer}
.switch span{display:inline-flex;align-items:center;gap:10px}
.switch span:after{content:'';width:42px;height:24px;border-radius:24px;background:var(--raised);border:1px solid var(--line);box-sizing:border-box;background-image:radial-gradient(circle at 11px 50%,var(--muted) 7px,transparent 7.5px);transition:background-position .15s}
.switch input:checked+span:after{background-color:color-mix(in srgb,var(--app-accent) 30%,var(--raised));border-color:var(--app-accent);background-image:radial-gradient(circle at 29px 50%,var(--app-accent) 7px,transparent 7.5px)}
.switch input:focus-visible+span:after{outline:2px solid var(--app-accent);outline-offset:3px}
input[type=range]:disabled{opacity:.4;cursor:not-allowed}
.brush-row{display:flex;align-items:center;gap:12px}.swatch{width:26px;height:26px;border-radius:50%;flex:none;border:2px solid var(--line);box-shadow:inset 0 0 0 2px var(--panel)}
.chips{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px}.chips button{flex:1 1 auto;font-size:12px;padding:8px 10px;font-weight:600}
.status{padding:10px 22px;margin:0;min-height:42px;color:var(--accent-text);font-size:12px;border-top:1px solid var(--line);background:var(--bg)}

/* cards below */
.insight-grid{display:grid;grid-template-columns:1.25fr 1fr;gap:16px;margin-top:18px}
.learning-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:16px;margin-top:16px}
.instrument{min-width:0;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:23px}
.instrument h2{font:600 21px/1.25 var(--font);letter-spacing:-.035em;margin-bottom:12px}
.instrument p:not(.eyebrow){font-size:13px;line-height:1.7;color:var(--muted)}
.instrument .fine{font-size:11px!important;line-height:1.6}
.explain-card #explainText{min-height:5.1em;color:var(--fg);opacity:.86}
.chart-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}.chart-head h3{font-size:12px;font-weight:600}
.legend i.spread{background:var(--app-accent)}.legend i.mean{background:var(--mean)}
#chart{display:block;width:100%;height:170px;margin-top:8px}
.ledger{margin:16px 0 10px}.ledger>div{display:flex;justify-content:space-between;gap:12px;padding:10px 0;border-top:1px solid var(--line);align-items:baseline}
.ledger dt{color:var(--muted);font-size:12px}.ledger dd{margin:0;font:13px var(--mono);text-align:right;font-variant-numeric:tabular-nums}
.ledger .ledger-total{border-top:1px dashed var(--muted)}.ledger .ledger-total dt{color:var(--fg)}
.ledger .ledger-error dd{color:var(--good)}.ledger .ledger-error dt{color:var(--fg)}
.challenge-list{list-style:none;padding:0;margin:6px 0 0;counter-reset:ch}
.challenge-list li{display:grid;grid-template-columns:auto minmax(0,1fr) auto;grid-template-areas:'n text badge' 'n text btn';gap:4px 14px;padding:15px 0;border-top:1px solid var(--line);align-items:center;counter-increment:ch}
.challenge-list li:before{content:'0' counter(ch);grid-area:n;font:11px var(--mono);color:var(--accent-text);align-self:start;padding-top:3px}
.challenge-list li>div{grid-area:text}.challenge-list strong{font-size:15px;display:block}.challenge-list p{margin-top:3px}
.challenge-list button{grid-area:btn;font-size:12px;justify-self:end}
.challenge-list .badge{grid-area:badge;justify-self:end;color:var(--muted)}
.challenge-list li.active strong{color:var(--accent-text)}
.badge[data-state=live]{color:var(--accent-text);border-color:var(--app-accent)}.badge[data-state=done]{color:var(--good);border-color:var(--good)}.badge[data-state=fail]{color:var(--danger);border-color:var(--danger)}
#challengeStatus{margin-top:10px;padding-top:12px;border-top:1px solid var(--line);color:var(--accent-text)}
.formula{font:15px/2 var(--mono)!important;color:var(--accent-text)!important;margin-bottom:12px}
.model-card details{border-top:1px solid var(--line);margin-top:14px}.model-card details+details{margin-top:0}
.model-card summary{padding-block:14px;cursor:pointer;min-height:44px;font-size:13px;font-weight:600;display:flex;align-items:center}
.model-card summary::-webkit-details-marker{display:none}.model-card summary:before{content:'+';font:16px var(--mono);color:var(--accent-text);width:22px}
.model-card details[open] summary:before{content:'−'}
.model-card details p{margin-bottom:12px}.model-card code{font:12px var(--mono);color:var(--accent-text)}
.model-card a{color:var(--fg)}
.app-footer{font-size:11px;margin-top:28px}
.noscript{max-width:1440px;margin:0 auto 30px;padding:0 24px;color:var(--muted)}

@media(max-width:1180px){.bench-body{grid-template-columns:minmax(0,1fr) 290px}.canvas-wrap{height:460px}.plot-hint{display:none}}
@media(max-width:1100px){.intro-glyph{display:none}.intro-note{max-width:360px}}
@media(max-width:960px){.bench-body{grid-template-columns:minmax(0,1fr)}.stage{border-right:0}.rail{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line)}.rail-group{border-right:1px solid var(--line)}.rail-group:nth-child(2n){border-right:0}.rail-group:last-child{grid-column:1/-1;border-right:0}.canvas-wrap{height:auto;aspect-ratio:1.45}.insight-grid,.learning-grid{grid-template-columns:1fr}}
@media(max-width:760px){.app-main{padding:26px 16px}.app-header{padding:12px 18px}.intro{gap:18px;align-items:start;padding-bottom:24px;flex-direction:column}.intro-note{max-width:none}.intro-note p{font-size:13px}.intro h1{font-size:42px}
  .presets{grid-template-columns:1fr 1fr}.presets button{padding:13px}.presets strong{font-size:15px}.presets small{font-size:11px}
  .bench-toolbar{padding:10px 12px}.plot-head{padding:16px 16px 4px}.plot-head h2{font-size:19px}
  .transport{padding:12px;gap:12px;flex-wrap:wrap}.transport-buttons{width:100%}.transport-buttons button{flex:1;padding-inline:9px}.time-controls{width:100%;justify-content:space-between}
  .readings{grid-template-columns:1fr 1fr}.readings>div{padding:13px 16px}.readings>div:nth-child(2){border-right:0}.readings>div:nth-child(-n+2){border-bottom:1px solid var(--line)}.readings strong{font-size:23px}
  .rail{grid-template-columns:1fr}.rail-group{border-right:0!important;padding:16px}.instrument{padding:20px}.status{padding:10px 16px}}
@media(max-width:520px){.app-main{padding:22px 12px}.app-header strong{font-size:10px;letter-spacing:.06em}.app-header strong span{display:none}.intro h1{font-size:35px}.intro-note p br{display:none}
  .presets{gap:8px}.presets button{padding:12px 11px}.presets span{font-size:8px;margin-bottom:7px}.presets strong{font-size:14px}.presets small{display:none}
  .tabs{width:100%;display:flex}.tabs button{flex:1}.bench-actions{width:100%;display:grid;grid-template-columns:repeat(3,1fr);gap:6px}.bench-actions button{font-size:11px;padding:8px 6px}
  .canvas-wrap{aspect-ratio:1.2}.readings small{font-size:10px}
  .challenge-list li{grid-template-columns:auto minmax(0,1fr);grid-template-areas:'n text' 'n badge' 'n btn';}.challenge-list .badge,.challenge-list button{justify-self:start}
  .chart-head{flex-direction:column;align-items:flex-start}.formula{font-size:13px!important}.app-footer{flex-direction:column}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
.skip-link:not(:focus){clip-path:inset(50%);opacity:0;pointer-events:none}

/* ---------- relayout (2026-10): settings rail hugs the map, everything on one screen ---------- */
.bench{overflow:clip}
@media(min-width:1100px){
  .bench-toolbar{padding:8px 16px}
  .plot-head{padding:12px 20px 4px}.plot-head h2{font-size:19px}.plot-head .eyebrow{margin-bottom:4px}
  .canvas-wrap{height:clamp(340px,calc(100vh - 430px),540px)}
  .transport{padding:9px 16px}
  .readings>div{padding:9px 18px 10px}.readings strong{font-size:21px;margin:2px 0 0}
  .rail-group{padding:11px 18px 12px}.rail-group .eyebrow{margin-bottom:6px}
  .rail input[type=range]{min-height:30px;height:30px;display:block;margin:0}
  .rail .range-labels{margin-top:0}
  .rail .fine{margin-top:3px}
  .rail .switch{min-height:34px}
  .rail .chips{margin-top:6px}.rail .chips button{min-height:34px;padding:5px 8px;font-size:11.5px}
  .rail select{min-height:38px;font-size:14px;padding:6px 10px}
  .status{min-height:34px;padding:8px 20px}
}
/* short desktop screens: slimmer question cards in one row */
@media(min-width:1100px) and (max-height:1050px){
  .intro{padding-bottom:22px}
  .presets{grid-template-columns:repeat(6,minmax(0,1fr));gap:8px;margin-bottom:14px}
  .presets button{padding:10px 13px 11px}.presets span{margin-bottom:5px}.presets strong{font-size:13.5px}.presets small{display:none}
}
/* phones: the map stays pinned at the top while the settings scroll under it */
@media(max-width:760px){
  .stage{display:contents}
  .bench-body{display:flex;flex-direction:column}
  .canvas-wrap{position:sticky;top:0;z-index:5;aspect-ratio:1.5;border-bottom:1px solid var(--line);box-shadow:0 8px 14px -8px #0005}
  .rail{border-top:1px solid var(--line)}
}