@font-face{font-family:Instrument;src:url('../../assets/fonts/instrument-sans-latin-400-normal.woff2');font-display:swap}
@font-face{font-family:Instrument;src:url('../../assets/fonts/instrument-sans-latin-600-normal.woff2');font-weight:600;font-display:swap}
@font-face{font-family:Anybody;src:url('../../assets/fonts/anybody-var.woff2');font-weight:100 900;font-display:swap}
@font-face{font-family:JetBrains;src:url('../../assets/fonts/jetbrains-mono-latin-400-normal.woff2');font-display:swap}
@font-face{font-family:JetBrains;src:url('../../assets/fonts/jetbrains-mono-latin-500-normal.woff2');font-weight:500;font-display:swap}

:root{--app-accent:#ff8a1f;--accent-text:#ff9d43;--bg:#0b1015;--panel:#111920;--raised:#1d2832;--line:#2b3741;--fg:#ecf0f2;--muted:#a3afb9;--soft:#7d8a95;
  --good:#71d8bd;--warn:#ffc66b;--bad:#ff7a66;--ball:#62d9ef;--pin:#e2b25a;--stage:#0a1117;--stage-line:#1d2a35;
  --font:Instrument,system-ui,sans-serif;--display:Anybody,system-ui,sans-serif;--mono:JetBrains,ui-monospace,monospace}
:root[data-theme=light]{--bg:#f4f2ee;--panel:#fff;--raised:#eeeae4;--line:#d8d3cb;--fg:#1b2933;--muted:#5c6870;--soft:#7a858c;--accent-text:#a64c00;
  --good:#167a62;--warn:#9a6200;--bad:#b8321f;--ball:#0a7f9a;--pin:#a8781c;--stage:#f8f6f2;--stage-line:#e4ded5}

body{font-family:var(--font);font-size:15px;background:radial-gradient(ellipse at 88% 0,#ff8a1f0d,transparent 40%),var(--bg)}
button{transition:background .15s,border-color .15s;touch-action:manipulation}
button.primary{background:var(--app-accent);color:#241204;border-color:var(--app-accent)}button.primary:hover{background:#ffa24b;border-color:#ffa24b}
button[aria-pressed=true]{border-color:var(--app-accent);background:color-mix(in srgb,var(--app-accent) 12%,var(--panel))}
button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,a:focus-visible,canvas:focus-visible{outline:2px solid var(--app-accent);outline-offset:3px}
input[type=range]{accent-color:var(--app-accent);min-height:36px}
output{color:var(--accent-text);font:500 13px var(--mono)}
.eyebrow{font:10px var(--mono);color:var(--accent-text);letter-spacing:.11em;margin-bottom:9px}

/* header + hero */
.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)}
.app-main{max-width:1440px;padding:38px 24px 28px}
.intro{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:0 0 30px}
.intro h1{font:650 clamp(38px,4.8vw,66px)/1.04 var(--display);letter-spacing:-.045em}.intro h1 span{color:var(--accent-text)}
.intro-note{display:flex;align-items:center;gap:22px;max-width:500px}.intro-note p{color:var(--muted);font-size:14px;line-height:1.7}
.intro-glyph{width:92px;height:92px;flex:0 0 92px;fill:none;stroke-linecap:round}
.intro-glyph .g-link{stroke:var(--accent-text);stroke-width:3.2}.intro-glyph .g-pin{fill:var(--pin);stroke:none}

/* question cards */
.section-label{display:flex;justify-content:space-between;gap:12px;font:10px var(--mono);letter-spacing:.11em;color:var(--muted);margin-bottom:10px}
.section-label span:first-child{color:var(--accent-text)}
.question-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:10px;margin-bottom:20px}
.question-grid button{text-align:left;min-width:0;padding:12px 14px 13px;background:var(--panel);border-radius:12px;position:relative;display:flex;flex-direction:column;align-items:flex-start;justify-content:flex-start}
.question-grid button[aria-pressed=true]:after{content:'';position:absolute;inset:auto 15px -1px;height:3px;background:var(--app-accent);border-radius:3px}
.question-grid span{display:block;font:9px var(--mono);color:var(--accent-text);letter-spacing:.06em;margin-bottom:9px}
.question-grid strong{font-size:14.5px;line-height:1.3;display:block}
.question-grid small{display:block;margin-top:6px;font-size:11px;line-height:1.45;color:var(--muted);font-weight:400}

/* bench */
.bench{border:1px solid var(--line);border-radius:17px;overflow:hidden;background:var(--panel);scroll-margin-top:12px;box-shadow:0 18px 60px #00000022}
.bench:focus{outline:none}
.bench-toolbar{padding:12px 16px;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);display:flex;gap:4px}
.tabs button{border:0;background:transparent;min-height:38px;font-size:12px;padding:6px 14px}
.tabs button[aria-pressed=true]{background:var(--app-accent);color:#241204}
.tabs button[aria-pressed=false]{color:var(--muted)}
.bench-actions{display:flex;gap:8px;flex-wrap:wrap}.bench-actions button{min-height:42px;font-size:12px}
#play{min-width:104px}

.meter-strip{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));border-bottom:1px solid var(--line);background:var(--bg)}
.readout{padding:10px 16px 11px;border-right:1px solid var(--line);min-width:0;position:relative}.readout:last-child{border-right:0}
.readout span{display:block;font:9px var(--mono);letter-spacing:.1em;color:var(--muted)}
.readout strong{display:block;font:500 20px/1.3 var(--mono);margin-top:3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.readout strong small{font:11px var(--mono);color:var(--muted)}
.readout em{display:block;font-style:normal;font-size:11px;color:var(--muted);line-height:1.4;margin-top:1px}
.readout[data-tone]:before{content:'';position:absolute;top:15px;right:14px;width:7px;height:7px;border-radius:50%;background:var(--good);box-shadow:0 0 10px currentColor;color:var(--good)}
.readout[data-tone=warn]:before{background:var(--warn);color:var(--warn)}.readout[data-tone=bad]:before{background:var(--bad);color:var(--bad)}
.readout[data-tone=bad] strong{color:var(--bad)}

.visual-switch{display:none!important}
.bench-body{display:grid;grid-template-columns:272px minmax(0,1.15fr) minmax(0,1fr);grid-template-areas:"rail stage map" "rail stage charts";grid-template-rows:auto 1fr;border-bottom:1px solid var(--line)}
.bench-body.no3d{grid-template-columns:272px minmax(0,1fr);grid-template-areas:"rail stage" "rail map" "rail charts"}
.bench-body.no3d .stage-panel{border-right:0}
.bench-body.no3d .stage-panel .panel-head{display:none}
.panel{padding:14px 16px 16px;min-width:0}
.stage-panel{grid-area:stage;border-right:1px solid var(--line)}
.map-panel{grid-area:map;padding-bottom:4px}
.charts-panel{grid-area:charts;padding:6px 16px 16px;min-width:0}
.rail{grid-area:rail;border-right:1px solid var(--line);background:var(--bg);min-width:0}
.panel-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:12px;flex-wrap:wrap}
.panel-head h2{font:620 24px/1.1 var(--display);letter-spacing:-.03em}
.panel-head .tabs button{min-height:34px;padding:4px 12px}
.legend{display:flex;gap:14px;flex-wrap:wrap;font-size:11px;color:var(--muted)}
.legend i{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:6px;vertical-align:-1px}
.legend .lg-pin{background:var(--pin)}.legend .lg-ball{background:color-mix(in srgb,var(--ball) 40%,transparent);border:1px solid var(--ball)}
.legend .lg-wind{width:16px;height:2px;border-radius:2px;background:var(--ball);vertical-align:3px}

/* 3D stage */
.stage3d{position:relative;height:clamp(380px,calc(100vh - 430px),600px);border-radius:12px;overflow:hidden;border:1px solid var(--stage-line);
  background:radial-gradient(ellipse at 50% 30%,#2a3540 0%,#151c23 55%,#0b1015 100%);touch-action:none}
:root[data-theme=light] .stage3d{background:radial-gradient(ellipse at 50% 30%,#ffffff 0%,#efebe4 60%,#e2dcd2 100%)}
.stage3d.failed{height:auto;background:var(--stage)}
.stage3d.failed .stage-legend,.stage3d.failed .view-reset{display:none}
.bench-body.no3d .map-wrap{max-width:760px}
.c3-host{position:absolute;inset:0}
.c3-canvas{display:block;outline:none;cursor:default}
.c3-canvas.grabbing{cursor:grabbing!important}.c3-canvas.cutting{cursor:crosshair}
.c3-canvas:focus-visible{outline:2px solid var(--app-accent);outline-offset:-3px}
.c3-trail{position:absolute;inset:0;pointer-events:none;width:100%;height:100%}
.c3-status{position:absolute;left:12px;bottom:10px;z-index:2;font:500 11px var(--mono);letter-spacing:.03em;padding:6px 11px;border-radius:20px;background:color-mix(in srgb,var(--panel) 88%,transparent);border:1px solid var(--app-accent);color:var(--accent-text);opacity:0;transition:opacity .25s;pointer-events:none;max-width:calc(100% - 24px)}
.c3-status.on{opacity:1}
.c3-hint{position:absolute;right:12px;bottom:10px;font:10px var(--mono);color:var(--muted);pointer-events:none;text-align:right;max-width:calc(100% - 24px)}
.c3-fallback{padding:16px;color:var(--muted);font-size:13px;line-height:1.6}
.stage-legend{position:absolute;left:12px;top:12px;pointer-events:none;font-size:10.5px;gap:10px;padding:4px 9px;border-radius:20px;background:color-mix(in srgb,var(--panel) 70%,transparent)}
.view-reset{position:absolute;right:10px;top:10px;min-height:34px;font-size:11px;padding:5px 11px;background:color-mix(in srgb,var(--panel) 85%,transparent)}
.c3-status.on~.c3-hint{opacity:0}.c3-hint{transition:opacity .2s}

/* constraint map */
.map-wrap{background:var(--stage);border:1px solid var(--stage-line);border-radius:12px;overflow:hidden}
#map{display:block;width:100%;aspect-ratio:4.75/4;touch-action:none}
#map.cutting{cursor:crosshair}
.ramp{display:flex;align-items:center;gap:8px;font:9.5px var(--mono);color:var(--soft);margin-top:9px}
.ramp i{flex:1;height:6px;border-radius:4px;background:linear-gradient(90deg,#4db3fa,#8cd1f2 45%,#c7cccc)}
.ramp i.hot{background:linear-gradient(90deg,#c7cccc,#ffdb6b 18%,#ff8f24 45%,#ed3833)}
:root[data-theme=light] .ramp i{background:linear-gradient(90deg,#4db3fa,#8cd1f2 45%,#6b7580)}
:root[data-theme=light] .ramp i.hot{background:linear-gradient(90deg,#6b7580,#ffdb6b 18%,#ff8f24 45%,#ed3833)}
.panel-note{font-size:11.5px;color:var(--muted);margin-top:8px;line-height:1.6}
.charts{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:10px}
.chart{margin:0;padding:9px 11px 6px;border:1px solid var(--line);border-radius:11px;background:var(--bg);min-width:0}
.chart figcaption{display:flex;justify-content:space-between;gap:8px;font:9px var(--mono);letter-spacing:.08em;color:var(--muted);flex-wrap:wrap}
.chart figcaption span:first-child{color:var(--fg)}
.chart canvas{display:block;width:100%;height:104px;margin-top:4px}
.chart-legend i{display:inline-block;width:12px;height:3px;border-radius:2px;margin:0 4px 0 8px;vertical-align:2px}
.chart-legend i.max{background:var(--accent-text)}.chart-legend i.mean{background:var(--ball)}

.status-line{min-height:0;margin:0;padding:0 18px;font-size:12px;color:var(--muted)}
.status-line:empty{display:none}
.status-line:not(:empty){padding:9px 18px;border-bottom:1px solid var(--line);background:var(--bg)}

/* controls */
.rail .group{border:0;border-bottom:1px solid var(--line);margin:0;padding:13px 16px 15px;min-width:0;display:grid;gap:10px;align-content:start}
.rail .group:last-child{border-bottom:0}
.group legend{float:left;width:100%;font:10px var(--mono);letter-spacing:.11em;text-transform:uppercase;color:var(--muted);padding:0;margin-bottom:2px}
.group legend span{color:var(--accent-text);margin-right:6px}
.control{min-width:0}
.control-head{display:flex;justify-content:space-between;align-items:baseline;gap:10px}
.control-head label,.control-head .label{color:var(--fg);font-size:13px;font-weight:600}
.control select{min-height:40px;font-size:14px;margin-top:4px;padding:7px 10px}
.chips{display:flex;gap:6px;flex-wrap:wrap;margin-top:6px}
.chips button{min-height:36px;padding:5px 12px;font-size:12px;border-radius:8px}
.chips button[aria-pressed=true]:before{content:'●';color:var(--pin);margin-right:6px;font-size:10px}
.chips button[aria-pressed=false]:before{content:'○';color:var(--soft);margin-right:6px;font-size:10px}
.scale{display:flex;justify-content:space-between;font:9px var(--mono);color:var(--soft);margin-top:-2px}
.hint{font-size:11.5px;color:var(--muted);margin-top:5px;line-height:1.5}

/* learn */
.learn{display:grid;grid-template-columns:1.15fr 1fr;gap:16px;margin-top:18px}
.learn-panel{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:20px 22px;min-width:0}
.learn-panel h2{font:620 26px/1.1 var(--display);letter-spacing:-.03em;margin-bottom:12px}
.happening p{font-size:14px;line-height:1.7;color:var(--muted);padding:9px 0;border-top:1px solid var(--line);display:grid;grid-template-columns:84px minmax(0,1fr);gap:12px}
.happening p:first-child{border-top:0}
.happening p .k{font:9px/2.3 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--accent-text)}
.happening b{color:var(--fg);font-weight:600}
.challenges{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.challenges li{border:1px solid var(--line);border-radius:11px;padding:12px 14px;background:var(--bg);transition:border-color .2s}
.challenges li.now{border-color:var(--good)}
.ch-head{display:flex;align-items:center;gap:10px}
.ch-mark{width:18px;height:18px;flex:0 0 18px;border-radius:50%;border:1.5px solid var(--soft);display:grid;place-items:center}
.done .ch-mark{background:var(--good);border-color:var(--good)}
.done .ch-mark:after{content:'';width:8px;height:4px;border:2px solid var(--bg);border-top:0;border-right:0;transform:rotate(-45deg) translate(1px,-1px)}
.challenges strong{font-size:14px}
.challenges p{font-size:12.5px;color:var(--muted);margin:5px 0 0 28px;line-height:1.55}
.challenges .ch-progress{font:11px var(--mono);color:var(--soft)}.now .ch-progress{color:var(--good)}
.challenges details{margin:6px 0 0 28px}.challenges summary{font-size:12px;cursor:pointer;color:var(--accent-text);min-height:28px;display:inline-flex;align-items:center}
.challenges details p{margin-left:0}

/* notes */
.notes{margin-top:16px;display:grid;gap:8px}
.notes details{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:0 20px}
.notes summary{cursor:pointer;min-height:52px;display:flex;align-items:center;font-weight:600;font-size:14px;list-style:none}
.notes summary::-webkit-details-marker{display:none}
.notes summary:after{content:'+';margin-left:auto;font:18px var(--mono);color:var(--accent-text)}
.notes details[open] summary:after{content:'−'}
.notes-body{padding:0 0 18px;max-width:900px}
.notes-body p,.notes-body li{font-size:13.5px;color:var(--muted);line-height:1.75;margin-bottom:10px}
.notes-body ul{padding-left:18px;margin:0}
.notes-body code{font:12.5px var(--mono);color:var(--accent-text)}
.notes-body b{color:var(--fg)}
.notes-body a{color:var(--fg)}
.noscript{padding:20px;color:var(--muted)}
.app-footer{margin-top:26px}

@media(max-width:1280px){
  .question-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .question-grid small{display:none}
  .meter-strip{grid-template-columns:repeat(3,minmax(0,1fr))}
  .readout:nth-child(3){border-right:0}.readout:nth-child(-n+3){border-bottom:1px solid var(--line)}
  .bench-body{grid-template-columns:250px minmax(0,1.1fr) minmax(0,1fr)}
}
@media(max-width:1100px){
  .bench-body{grid-template-columns:250px minmax(0,1fr);grid-template-areas:"rail stage" "rail map" "charts charts"}
  .stage-panel{border-right:0;border-bottom:1px solid var(--line)}
  .map-wrap{max-width:620px}
  .learn{grid-template-columns:minmax(0,1fr)}
}
@media(max-width:760px){
  .app-header{padding-inline:16px;min-height:62px}
  .app-header strong span{display:none}
  .app-main{padding:26px 14px 24px}
  .intro{flex-direction:column;align-items:flex-start;gap:16px;padding-bottom:22px}
  .intro-glyph{width:56px;height:56px;flex-basis:56px}
  .intro-note{gap:14px}.intro-note p{font-size:13px}
  .question-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:8px}
  .question-grid button{padding:12px}.question-grid strong{font-size:13.5px}
  .section-label span:last-child{display:none}
  .bench{overflow:visible}
  .bench-toolbar{padding:10px 12px;gap:8px}
  .bench-toolbar>.tabs{width:100%}.bench-toolbar>.tabs button{flex:1}
  .bench-actions{width:100%;display:grid;grid-template-columns:1fr 1fr;gap:6px}.bench-actions button{min-height:40px;padding:6px 8px}
  #play{grid-column:1/-1}
  .meter-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
  .readout{padding:9px 12px;border-bottom:1px solid var(--line)}
  .readout:nth-child(3){border-right:1px solid var(--line)}
  .readout:nth-child(2n){border-right:0}.readout:nth-child(n+5){border-bottom:0}
  .readout strong{font-size:17px}.readout em{font-size:10.5px}
  .bench-body,.bench-body.no3d{display:block}
  .visual-switch{display:flex!important;margin:10px 12px}.visual-switch button{flex:1}
  .bench-body[data-view=map] .stage-panel,.bench-body:not([data-view=map]) .map-panel{display:none}
  /* the view stays pinned to the top while the settings scroll underneath it */
  .stage-panel,.map-panel{position:sticky;top:0;z-index:6;background:var(--panel);padding:8px 10px 10px;border:0;box-shadow:0 10px 18px -12px #0009}
  .panel-head{margin-bottom:8px;align-items:center}
  .panel-head .eyebrow,.panel-head h2{display:none}
  .panel-head .tabs{width:100%}.panel-head .tabs button{flex:1}
  .stage3d{height:min(300px,40vh)}.c3-hint{display:none}
  .stage-legend{font-size:9.5px}
  #map{aspect-ratio:4.75/4.3;max-height:40vh}
  .map-panel .panel-note,.map-panel .ramp{display:none}
  .rail{border-right:0;border-top:1px solid var(--line)}
  .rail .group{padding:14px 14px 16px}
  .charts-panel{padding:12px}
  .charts{grid-template-columns:minmax(0,1fr)}
  .learn-panel{padding:17px 15px}
  .happening p{grid-template-columns:minmax(0,1fr);gap:2px;font-size:13.5px}
  .challenges p,.challenges details{margin-left:0}
  .notes details{padding:0 15px}
}
@media(max-width:420px){
  .question-grid small{display:none}.question-grid strong{font-size:13px}.question-grid span{margin-bottom:6px}
}
@media(prefers-reduced-motion:reduce){.c3-status{transition:none}}