@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;--ray-in:#ffe2b0;--ray-re:#ff8a1f;--ray-tr:#62d9ef;--stage:#0a1117;--stage-line:#1d2a35;--mat:#62d9ef;--mat-fill:#12303a;--zone:#ff7a66;
  --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;--ray-in:#8a5a12;--ray-re:#e06a00;--ray-tr:#0a84a0;--stage:#f8f6f2;--stage-line:#e4ded5;--mat:#0a84a0;--mat-fill:#d7ecf1;--zone:#b8321f}

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{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:470px}.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:var(--accent-text);stroke-width:4;stroke-linecap:round;transform:rotate(-12deg)}

/* 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:14px 15px 15px;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;overflow:clip;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}

.meter-strip{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));border-bottom:1px solid var(--line);background:var(--bg)}
.readout{padding:12px 18px 13px;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 22px/1.35 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}
.panel{padding:16px 18px 18px;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}
.legend{display:flex;gap:14px;flex-wrap:wrap;font-size:11px;color:var(--muted);padding-top:4px}
.legend i{display:inline-block;width:14px;height:3px;border-radius:2px;margin-right:6px;vertical-align:middle}
.legend i.in{background:var(--ray-in)}.legend i.re{background:var(--ray-re)}.legend i.tr{background:var(--ray-tr)}
.tag{font:10px var(--mono);letter-spacing:.06em;color:var(--muted);border:1px solid var(--line);border-radius:30px;padding:5px 10px}

/* controls */
.group{border:0;margin:0;padding:0;min-width:0;display:grid;gap:12px;align-content:start}
.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{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:5px;flex-wrap:wrap;margin-top:2px}
.chips button{min-height:32px;padding:4px 10px;font:500 11px var(--mono);border-radius:7px}
.chips button:disabled{opacity:1;color:var(--good);border-color:color-mix(in srgb,var(--good) 40%,var(--line));background:transparent;cursor:default}
.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}
.stop-sum{border:1px dashed var(--line);border-radius:10px;padding:11px 13px}
.stop-sum span{display:block;font:9px var(--mono);letter-spacing:.08em;color:var(--accent-text);margin-bottom:5px}
.stop-sum p{font-size:12px;color:var(--muted);line-height:1.6}

/* 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}


.journey{font-size:13px;color:var(--muted);margin:0}.journey b{color:var(--fg);font-weight:600}

/* cross-section + curve */
.svg-wrap{background:var(--stage);border:1px solid var(--stage-line);border-radius:12px;overflow:hidden}
.section{display:block;width:100%;height:auto;aspect-ratio:760/440}
.curve{display:block;width:100%;height:auto;aspect-ratio:760/250}
.section text,.curve text{font-family:var(--mono)}
.sx-air{fill:transparent}
.sx-mat{fill:color-mix(in srgb,var(--mat) 13%,var(--stage))}
.sx-surface{fill:none;stroke:var(--mat);stroke-width:2;stroke-linejoin:round}
.sx-normal{stroke:var(--soft);stroke-width:1.2;stroke-dasharray:3 5}
.sx-medium{font-size:12px;fill:var(--fg);letter-spacing:.08em;font-weight:500}
.sx-small{font-size:10px;fill:var(--muted);letter-spacing:.05em}
.sx-zone{stroke:none}
.sx-zone-tir{fill:color-mix(in srgb,var(--zone) 14%,transparent)}
.sx-zone-max{fill:color-mix(in srgb,var(--soft) 12%,transparent)}
.sx-zone-label{font-size:10px;letter-spacing:.14em;fill:var(--zone);opacity:.9}
.sx-zone-max~.sx-zone-label{fill:var(--soft)}
.sx-crit{stroke:var(--zone);stroke-width:1.4;stroke-dasharray:6 4}
.sx-crit-label{font-size:11px;fill:var(--zone)}
.sx-fan line{stroke:var(--ray-re);stroke-width:1.2}
.sx-glow{stroke-linecap:round}
.sx-core{stroke-linecap:round;stroke-dasharray:14 8}
.sx-flow{animation:flow 1s linear infinite}
.sx-in{stroke:var(--ray-in);fill:var(--ray-in)}.sx-re{stroke:var(--ray-re);fill:var(--ray-re)}.sx-tr{stroke:var(--ray-tr);fill:var(--ray-tr)}
.sx-glow.sx-in{stroke-width:9;opacity:.12}.sx-core.sx-in{stroke-width:3.2}
.sx-head{stroke:none}
.sx-hit{fill:var(--fg)}
.sx-arc{fill:none;stroke-width:1.3}.sx-arc-in{stroke:var(--ray-in)}.sx-arc-re{stroke:var(--ray-re)}.sx-arc-tr{stroke:var(--ray-tr)}
.sx-angle{font-size:12px;font-weight:500}
.sx-in-t{fill:var(--ray-in)}.sx-re-t{fill:var(--ray-re)}.sx-tr-t{fill:var(--ray-tr)}
.sx-tag{font-size:10.5px;letter-spacing:.06em;font-weight:500}
.sx-tir{font-size:12px;fill:var(--zone)}
.sx-bar-bg{fill:var(--stage-line)}.sx-bar-re{fill:var(--ray-re)}.sx-bar-tr{fill:var(--ray-tr)}
.paused .sx-flow{animation-play-state:paused}
@keyframes flow{to{stroke-dashoffset:-22}}
.panel-note{font-size:11px;color:var(--muted);margin-top:10px;line-height:1.6}
.curve-head{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font:9px var(--mono);letter-spacing:.08em;color:var(--muted);margin:14px 0 6px}
.curve-head span:last-child{color:var(--accent-text)}
.fc-grid{stroke:var(--stage-line);stroke-width:1}
.fc-tick{font-size:10px;fill:var(--soft)}.fc-legend{fill:var(--muted)}
.fc-axis{font-size:9.5px;fill:var(--muted);letter-spacing:.08em}
.fc-beyond{fill:color-mix(in srgb,var(--soft) 9%,transparent)}
.fc-schlick{fill:none;stroke:var(--ray-re);stroke-width:2.6;stroke-linejoin:round}
.fc-exact{fill:none;stroke:var(--muted);stroke-width:1.4;stroke-dasharray:5 4}
.fc-crit{stroke:var(--zone);stroke-width:1.3;stroke-dasharray:5 4}.fc-crit-t{font-size:10.5px;fill:var(--zone)}
.fc-cursor{stroke:var(--fg);stroke-width:1;stroke-dasharray:2 4;opacity:.6}
.fc-dot{fill:var(--ray-re);stroke:var(--stage);stroke-width:2.5}
.fc-dot-t{font-size:12px;font-weight:500;fill:var(--fg)}
.fc-f0{font-size:10.5px;fill:var(--muted)}

/* 3D render */
.tag{font:10px var(--mono);letter-spacing:.06em;color:var(--muted);border:1px solid var(--line);border-radius:30px;padding:5px 10px}
.stage3d{position:relative;flex:1 1 auto;min-height:420px;border-radius:12px;overflow:hidden;border:1px solid var(--stage-line);background:radial-gradient(ellipse at 50% 35%,#26313c 0%,#141b22 55%,#0b1015 100%);touch-action:none}
:root[data-theme=light] .stage3d{background:radial-gradient(ellipse at 50% 35%,#ffffff 0%,#ece8e1 60%,#ddd7ce 100%)}
.stage3d.failed{flex:none;min-height:0;height:auto;background:var(--stage);touch-action:auto}
.r3-host{position:absolute;inset:0}
.r3-canvas{display:block;outline:none;cursor:grab}.r3-canvas:active{cursor:grabbing}
.r3-canvas:focus-visible{outline:2px solid var(--app-accent);outline-offset:-3px}
.view-chip{position:absolute;left:12px;top:12px;max-width:calc(100% - 24px);font:500 11px/1.45 var(--mono);letter-spacing:.02em;padding:6px 11px;border-radius:14px;background:color-mix(in srgb,var(--panel) 86%,transparent);border:1px solid var(--line);color:var(--fg);pointer-events:none;backdrop-filter:blur(4px)}
.view-chip:empty{display:none}
.inside-note{position:absolute;left:12px;bottom:12px;max-width:min(360px,calc(100% - 24px));font-size:12px;line-height:1.5;padding:8px 12px;border-radius:10px;background:color-mix(in srgb,var(--panel) 90%,transparent);border:1px solid var(--zone);color:var(--fg);pointer-events:none}
.r3-hint{position:absolute;right:12px;bottom:10px;font:10px var(--mono);color:var(--muted);pointer-events:none}
.r3-fallback{padding:18px;color:var(--muted);font-size:13px;line-height:1.6}
.stage-tools{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px}
.stage-tools button{min-height:38px;font-size:12px;padding:6px 12px}

/* noise */
.noise-panel{border-bottom:1px solid var(--line)}
.noise-actions{display:flex;gap:6px;flex-wrap:wrap}.noise-actions button{min-height:38px;font-size:12px;padding:6px 12px}
.noise-grid{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:14px}
.noise-chart{background:var(--stage);border:1px solid var(--stage-line);border-radius:12px;padding:8px;min-width:0}
#noiseChart{display:block;width:100%;height:220px}
.noise-patch{display:flex;gap:14px;align-items:center;background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:12px;min-width:0}
#noisePatch{width:128px;height:128px;flex:0 0 128px;border-radius:4px;image-rendering:pixelated}
.noise-patch span{display:block;font:9px var(--mono);letter-spacing:.1em;color:var(--muted)}
.noise-patch strong{display:block;font:500 17px var(--mono);margin:3px 0 4px}
.noise-patch em{display:block;font-style:normal;font-size:11.5px;color:var(--muted);line-height:1.5}
.label{display:block;color:var(--fg);font-size:13px;font-weight:600;margin-bottom:4px}
.seed-row{display:flex;gap:8px;margin-top:4px}.seed-row input{flex:1;min-height:40px;font:500 14px var(--mono)}.seed-row button{min-height:40px;font-size:12px;white-space:nowrap}

@media(prefers-reduced-motion:reduce){.sx-flow{animation:none}}
.intro-glyph{transform:none}.intro-glyph .g-surf{stroke:var(--mat);stroke-width:3}.intro-glyph .g-norm{stroke:var(--soft);stroke-width:2;stroke-dasharray:3 5}.intro-glyph .g-tr{stroke:var(--ray-tr)}

/* compact hero so presets, readouts, stage and controls share one screen */
.app-main{padding-top:22px}
.intro{padding:0 0 16px;gap:24px}
.intro h1{font-size:clamp(28px,2.7vw,38px);line-height:1.08;white-space:nowrap}.intro>div:first-child{min-width:0}.intro-note{max-width:440px}
.intro-note p{font-size:13px;line-height:1.6}.intro-glyph{width:64px;height:64px;flex-basis:64px}
.question-grid{margin-bottom:12px}
@media(min-width:1100px){.question-grid small{display:none}.question-grid button{min-height:0}}
.question-grid button{padding:11px 13px 12px}
.question-grid span{margin-bottom:6px}.question-grid strong{font-size:13.5px}.question-grid small{font-size:10.5px;margin-top:4px}
.readout{padding:9px 16px 10px}.readout strong{font-size:20px;line-height:1.3}

/* stage grid: controls | cross-section + curve | 3D */
.stage-grid.no3d{grid-template-areas:"side section render" "side section curve"}
.no3d .curve-panel{border-right:0}.no3d .render-panel>.panel-note,.no3d .render-panel .tag{display:none}
.stage-grid{display:grid;grid-template-columns:268px minmax(0,1fr) minmax(0,1fr);grid-template-rows:auto 1fr;grid-template-areas:"side section render" "side curve render";border-bottom:1px solid var(--line)}
.side-controls{grid-area:side;border-right:1px solid var(--line);padding:14px 16px 18px;display:grid;gap:18px;align-content:start;background:var(--panel)}
.side-top{display:flex;align-items:center;justify-content:space-between;gap:10px}
.side-top .journey{font-size:12.5px;line-height:1.4}
.side-top button{min-height:34px;font-size:11.5px;padding:4px 11px}
.side-controls .hint{font-size:11px;margin-top:3px}
.side-controls .chips button{padding:3px 7px;min-height:30px;font-size:10.5px}
@media(min-width:1100px){.side-controls .hint{display:none}.side-controls{gap:14px}}
.dir-tabs{margin-top:4px}.dir-tabs button{flex:1;padding:6px 8px;min-height:36px}
.side-controls .group{gap:10px}
.section-panel{grid-area:section;border-right:1px solid var(--line);padding-bottom:6px}
.curve-panel{grid-area:curve;border-right:1px solid var(--line);padding-top:4px}
.curve-panel .curve-head{margin-top:0}
.render-panel{grid-area:render;display:flex;flex-direction:column}
.panel-head{margin-bottom:10px}.panel-head h2{font-size:21px}
.noise-grid{grid-template-columns:minmax(0,1fr) 300px 260px}
.noise-controls{display:grid;gap:14px;align-content:start}
.noise-panel{border-bottom:0}

@media(max-width:1280px){
  .question-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .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)}
  .stage-grid{grid-template-columns:250px minmax(0,1fr) minmax(0,1fr)}
}
@media(max-width:1099px){
  .stage-grid{grid-template-columns:250px minmax(0,1fr);grid-template-areas:"side section" "side curve" "render render"}
  .curve-panel{border-right:0}.section-panel{border-right:0}
  .stage-grid.no3d{grid-template-areas:"side section" "side curve" "render render"}
  .render-panel{border-top:1px solid var(--line)}
  .stage3d{min-height:440px}
  .learn{grid-template-columns:minmax(0,1fr)}
  .noise-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}.noise-chart{grid-column:1/-1}
}
@media(max-width:760px){
  .app-header{padding-inline:16px;min-height:62px}
  .app-header strong span{display:none}
  .app-main{padding:20px 14px 24px}
  .intro{flex-direction:column;align-items:flex-start;gap:12px;padding-bottom:16px}
  .intro h1{font-size:30px;white-space:normal}
  .intro-glyph{width:48px;height:48px;flex-basis:48px}
  .intro-note{gap:12px}.intro-note p{font-size:12.5px}
  .question-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:8px}
  .question-grid button{padding:10px 11px}.question-grid strong{font-size:13px}
  .section-label span:last-child{display:none}
  .meter-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
  .readout{padding:8px 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}
  .panel{padding:12px}
  .panel-head h2{font-size:19px}
  .panel-head .legend{display:none}
  .visual-switch{display:flex!important;margin:10px 12px}.visual-switch button{flex:1;padding-inline:6px}
  /* stage on top and sticky, controls straight underneath */
  .stage-grid{display:flex;flex-direction:column}
  .section-panel,.render-panel{order:1;position:sticky;top:0;z-index:4;background:var(--panel);border-right:0;border-bottom:1px solid var(--line);box-shadow:0 8px 18px #0000002e}
  .section-panel .eyebrow,.render-panel .eyebrow,.render-panel>.panel-note{display:none}
  .section-panel .panel-head,.render-panel .panel-head{margin-bottom:6px}
  .side-controls{order:2;border-right:0;padding:14px 14px 18px}
  .curve-panel{order:3;border-right:0;border-top:1px solid var(--line);padding-top:12px}
  .bench[data-view=section] .render-panel,.bench[data-view=render] .section-panel,.bench[data-view=noise] .stage-grid{display:none}
  .bench:not([data-view=noise]) .noise-panel{display:none}
  .stage3d{min-height:0;height:300px;flex:none}.r3-hint{display:none}
  .view-chip{font-size:10px;padding:5px 9px}
  .stage-tools{margin-top:8px}.stage-tools button{flex:1 1 auto;min-height:34px;font-size:11px;padding:4px 8px}
  .sx-medium{font-size:17px}.sx-small{font-size:14px}.sx-angle{font-size:18px}.sx-tag{font-size:15px}.sx-crit-label,.sx-zone-label{font-size:15px}.sx-tir{font-size:16px}
  .sx-energy{display:none}
  .fc-tick{font-size:15px}.fc-axis{font-size:13px}.fc-dot-t{font-size:18px}.fc-f0,.fc-crit-t{font-size:15px}.fc-legend-g{display:none}
  .noise-grid{grid-template-columns:minmax(0,1fr)}
  #noisePatch{width:104px;height:104px;flex-basis:104px}
  #noiseChart{height:200px}
  .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 span{margin-bottom:5px}
}