@font-face{font-family:Lab;src:local('Arial');font-weight:100 900;font-display:swap}
:root{font-family:Lab,'Segoe UI',Arial,sans-serif;color:#252725;background:#e8e7e2;font-synthesis:none;--ink:#252725;--muted:#83847d;--line:#cbccc4;--orange:#e9582a;--paper:#e8e7e2}
*{box-sizing:border-box}body{margin:0;min-width:360px;height:100svh;min-height:680px;overflow:hidden}button,input,select{font:inherit}button{cursor:pointer}button:disabled{cursor:wait;opacity:.5}button,select,a,input{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible,canvas:focus-visible{outline:2px solid var(--orange);outline-offset:5px}button{color:inherit}button svg{display:block}a{color:inherit;text-decoration:none}button,select{touch-action:manipulation}#scene{position:absolute;left:270px;top:77px;width:calc(100% - 270px);height:calc(100% - 126px);outline:none;touch-action:none;cursor:grab}#scene.grabbing{cursor:grabbing}.topbar{height:78px;margin:0 40px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);position:relative;z-index:2}.brand{display:flex;align-items:center;gap:10px;font-size:24px;letter-spacing:-1.1px;font-weight:800}.brand-mark{display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:var(--orange);color:var(--paper);font-size:31px;font-weight:500;line-height:1;padding-bottom:5px}.brand-dot{font-size:9px;vertical-align:super;letter-spacing:0;padding-left:3px}.masthead{font-size:9px;font-weight:600;letter-spacing:1.6px;color:#767970;margin-left:50px}.masthead span{margin:0 14px;color:#a5a79c}.live-status{display:flex;align-items:center;gap:8px;font-family:Consolas,monospace;font-size:10px;letter-spacing:.4px;min-width:162px;justify-content:flex-end}.status-dot{width:6px;height:6px;background:#adac9f;border-radius:50%}.status-dot.ready{background:#6f8d63;box-shadow:0 0 0 3px #7b936313}.status-separator{height:12px;width:1px;background:var(--line);margin:0 8px}#fps{font-size:13px;font-weight:700;min-width:18px}.fps-unit{font-size:8px;color:#87897f}.sidebar{position:absolute;z-index:2;left:42px;top:139px;width:243px}.eyebrow{font-size:8px;font-weight:700;letter-spacing:1.35px;display:flex;gap:9px;align-items:center}.small-rule{height:1px;width:19px;background:var(--orange)}h1{font-size:54px;line-height:1.02;letter-spacing:-2.7px;font-weight:400;margin:24px 0 20px}h1 em{font-style:normal;color:var(--orange)}.intro{font-size:12px;line-height:1.8;color:#777a71;margin:0 0 29px}.primary-button{background:var(--orange);color:#fff;border:0;border-radius:4px;display:flex;align-items:center;justify-content:center;gap:11px;padding:16px 12px;width:100%;box-shadow:0 4px 10px #b8481f14;transition:background .2s,transform .2s}.primary-button:hover{background:#d24a21;transform:translateY(-1px)}.primary-button svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:1.4}.primary-button span{font-size:11px;font-weight:600}.primary-button kbd{font:7px Consolas,monospace;letter-spacing:.5px;border:1px solid #ffffff50;border-radius:3px;padding:3px 4px;margin-left:auto;color:#ffdfce}.secondary-actions{display:flex;justify-content:space-between;margin:13px 0 26px}.secondary-actions button{border:0;background:none;padding:6px 0;font-size:10px;color:#61655c}.secondary-actions button:hover{color:var(--orange)}.secondary-actions button span{font-size:16px;vertical-align:-1px;margin-right:5px}.settings{border-top:1px solid var(--line);padding-top:22px}.setting-label{display:flex;justify-content:space-between;font-size:10px;align-items:baseline}.setting-label>span:last-child{font-family:Consolas,monospace;font-size:10px}.setting-label small{color:#85887e;font-size:9px}.settings input[type=range]{width:100%;accent-color:var(--orange);appearance:none;height:3px;background:linear-gradient(to right,var(--orange) 49%,#c5c7bd 49%);margin:20px 0 12px;cursor:pointer}.settings input[type=range]::-webkit-slider-thumb{appearance:none;width:10px;height:10px;background:var(--paper);border:2px solid var(--orange);border-radius:50%;box-shadow:0 0 0 3px var(--paper)}.settings input[type=range]::-moz-range-thumb{width:7px;height:7px;background:var(--paper);border:2px solid var(--orange);border-radius:50%}.range-labels{display:flex;justify-content:space-between;font-family:Consolas,monospace;font-size:7px;letter-spacing:.6px;color:#919387}.time-label{margin-top:24px}.segments{display:flex;border:1px solid #c9cbc1;border-radius:4px;padding:3px;margin-top:12px;gap:3px}.segments button{width:33.333%;border:0;background:none;font-family:Consolas,monospace;color:#85897f;font-size:10px;padding:7px;border-radius:2px;transition:background .2s}.segments button.active{color:#efeee6;background:#363c34}.setting-row{display:flex;align-items:center;justify-content:space-between;font-size:10px;margin-top:19px}.setting-row select{border:0;background:transparent;color:#686e62;font-size:10px;cursor:pointer;max-width:88px}.setting-row input[type=checkbox]{appearance:none;width:25px;height:14px;border-radius:8px;background:#c5c9be;cursor:pointer;margin:0;position:relative;transition:background .2s}.setting-row input[type=checkbox]:after{content:'';position:absolute;width:10px;height:10px;left:2px;top:2px;border-radius:50%;background:#f3f2ec;transition:transform .2s}.setting-row input:checked{background:var(--orange)}.setting-row input:checked:after{transform:translateX(11px)}.sidebar-note{display:flex;gap:11px;margin-top:37px;align-items:center;color:#989b8f;font-size:7px;letter-spacing:1.1px;line-height:1.8}.tiny-cross{font-size:23px;font-weight:300}.scene-meta{position:absolute;right:43px;top:113px;display:flex;flex-direction:column;gap:8px;pointer-events:none}.meta-label{color:#8b8f82;font-size:7px;font-weight:600;letter-spacing:1.4px}.scene-meta strong{font-size:11px;font-weight:600;letter-spacing:.3px}.scene-meta strong span{color:#92958b;margin-left:4px}.meta-description{font-size:8px;color:#8a8f81}.scene-tools{position:absolute;right:41px;top:203px;display:flex;gap:7px}.icon-button{border:1px solid #bdc3b6;background:#e8e7e28c;backdrop-filter:blur(8px);width:29px;height:29px;border-radius:50%;display:grid;place-items:center;font:12px Georgia,serif;color:#727b68}.icon-button:hover{background:#f3f2ec}.icon-button svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:1.2}.scene-caption{position:absolute;left:343px;top:114px;display:flex;align-items:center;gap:9px;font:8px Consolas,monospace;color:#77816c;letter-spacing:.4px;pointer-events:none}.crosshair{color:var(--orange);font-size:19px;line-height:1}.caption-line{width:32px;height:1px;background:#bec5b4}.grab-hint{position:absolute;bottom:197px;left:calc(50% + 100px);transform:translateX(-50%);display:flex;align-items:center;gap:9px;white-space:nowrap;font-size:7px;letter-spacing:1.1px;font-weight:600;color:#818a76;pointer-events:none;transition:opacity .35s}.grab-hint svg{width:15px;height:17px;stroke:currentColor;fill:none;stroke-width:1.1}.experiments{position:absolute;bottom:83px;left:calc(50% + 115px);transform:translateX(-50%);display:flex;width:min(660px,calc(100% - 390px));border-radius:6px;background:#f4f3ecb8;backdrop-filter:blur(16px);box-shadow:0 12px 35px #373f2810;border:1px solid #ffffff95;padding:6px;gap:4px}.experiment{min-width:0;position:relative;flex:1;display:flex;align-items:center;gap:11px;padding:20px 13px;border:1px solid transparent;border-radius:4px;background:transparent;text-align:left;transition:background .2s,border-color .2s}.experiment:hover{background:#ffffff66}.experiment.active{border-color:#d2d5c8;background:#fafaf2c9;box-shadow:0 2px 7px #505c3910}.experiment-number{position:absolute;left:10px;top:7px;font:7px Consolas,monospace;color:#9a9e8e}.experiment>svg{flex:0 0 34px;width:34px;height:29px;stroke:#8c9680;stroke-width:1.3;fill:none}.experiment.active>svg{stroke:var(--orange)}.experiment strong{display:block;font-weight:600;font-size:11px;white-space:nowrap}.experiment small{display:block;font-size:6px;letter-spacing:.7px;color:#8e9581;margin-top:7px;white-space:nowrap}.experiment-dot{width:4px;height:4px;position:absolute;right:10px;top:10px;border-radius:50%;background:#b9bfad}.experiment.active .experiment-dot{background:var(--orange)}.footer{position:absolute;bottom:0;height:49px;left:40px;right:40px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;color:#8d9183;font-size:7px;letter-spacing:1px;font-family:Consolas,monospace}.footer-divider{margin:0 7px;color:#b0b6a2}.footer>div{display:flex;gap:25px;margin-left:35px}.footer>div>span{display:flex;align-items:center;gap:7px}.mouse-icon{width:9px;height:13px;display:inline-block;border:1px solid #9ba28e;border-radius:5px;position:relative}.mouse-icon:after{content:'';height:3px;width:1px;background:#9ba28e;position:absolute;top:2px;left:3px}.scroll-icon{font-size:16px}.footer-right>span{font-size:13px;margin-left:10px}.loading{position:absolute;left:calc(50% + 110px);top:45%;transform:translate(-50%,-50%);display:flex;align-items:center;gap:12px;font-size:12px;color:#758069}.loading-spinner{width:19px;height:19px;border:2px solid #bdc6b1;border-top-color:var(--orange);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}[hidden]{display:none!important}.error-panel{position:absolute;z-index:5;left:calc(50% + 100px);top:44%;transform:translate(-50%,-50%);background:#f6f5efeb;backdrop-filter:blur(15px);border:1px solid #cecec3;border-radius:10px;padding:35px;max-width:430px;width:80%;box-shadow:0 15px 50px #373c2515}.error-symbol{color:var(--orange);font-size:32px}.error-panel h2{font-size:22px;font-weight:400;letter-spacing:-.6px}.error-panel p{font-size:12px;line-height:1.8;color:#777d6d}.error-panel button{background:var(--ink);color:white;border:0;border-radius:3px;padding:10px 15px;font-size:11px}.toast{position:absolute;bottom:188px;left:calc(50% + 110px);transform:translate(-50%,8px);background:#31372eea;color:#f2f4e9;border-radius:4px;padding:10px 16px;font-size:10px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s}.toast.visible{opacity:1;transform:translate(-50%,0)}dialog{background:#f3f2eb;border:1px solid #d6d7cd;color:var(--ink);border-radius:8px;width:min(440px,90vw);padding:36px;box-shadow:0 25px 80px #18231330}dialog::backdrop{background:#3d433e35;backdrop-filter:blur(5px)}dialog h2{font-size:27px;letter-spacing:-1px;font-weight:400;margin:18px 0 28px}dialog dl{display:grid;grid-template-columns:145px 1fr;gap:17px;font-size:11px}dialog dt{font-weight:600}dialog dd{margin:0;color:#777f6c;font-size:10px}kbd{font-family:Consolas,monospace;font-size:9px}dialog kbd{padding:3px 5px;background:#e1e3d7;border-radius:2px}dialog p{font-size:10px;line-height:1.7;color:#888f7b;margin-top:28px;border-top:1px solid var(--line);padding-top:18px}.close-help{position:absolute;right:16px;top:12px;border:0;background:none;font-size:25px;color:#929987}
@media(min-height:900px){.sidebar{top:165px}.intro{margin-bottom:35px}.settings{padding-top:27px}.time-label{margin-top:30px}.sidebar-note{margin-top:43px}.experiments{bottom:105px}.grab-hint{bottom:225px}}
@media(max-height:790px) and (min-width:761px){.sidebar{top:111px}h1{font-size:47px;margin:19px 0 15px}.intro{margin-bottom:22px}.secondary-actions{margin:9px 0 17px}.settings{padding-top:16px}.time-label{margin-top:17px}.setting-row{margin-top:13px}.sidebar-note{margin-top:20px}.experiments{bottom:72px}.grab-hint{bottom:176px}.scene-caption{top:112px}}
@media(max-width:1100px){.masthead{display:none}.topbar{margin:0 25px}.sidebar{left:27px;width:220px}.scene-meta{right:27px}.scene-tools{right:27px}.scene-caption{left:283px}.experiments{width:calc(100% - 300px);left:calc(50% + 128px)}.experiment{padding:22px 10px;gap:7px}.experiment>svg{flex-basis:27px;width:27px}.experiment strong{font-size:10px}.experiment small{font-size:5px;letter-spacing:.2px}.footer{left:25px;right:25px}.footer-right{display:none}#scene{left:235px;width:calc(100% - 235px)}.grab-hint{left:calc(50% + 117px)}}
@media(max-width:760px){body{min-height:740px;overflow:auto}.topbar{height:65px;margin:0 20px}.brand{font-size:20px}.brand-mark{width:28px;height:28px;font-size:28px}.live-status{font-size:8px;min-width:140px}.sidebar{top:87px;left:22px;width:calc(100% - 44px);display:grid;grid-template-columns:1fr 175px;column-gap:20px;pointer-events:none}.sidebar>*{pointer-events:auto}.eyebrow{font-size:6px;grid-column:1}h1{font-size:34px;letter-spacing:-1.6px;margin:13px 0 0;grid-column:1}.intro{display:none}.primary-button{grid-column:2;grid-row:2;align-self:center;height:42px;gap:8px;padding:10px}.primary-button span{font-size:10px}.primary-button kbd{display:none}.secondary-actions{grid-column:2;grid-row:3;margin:0}.secondary-actions button{font-size:9px}.settings{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;gap:0 30px;position:absolute;top:calc(100svh - 299px);width:100%;padding-top:14px}.setting-label{font-size:9px}.settings>input[type=range]{grid-column:1;grid-row:2;margin:15px 0 10px}.range-labels{grid-column:1;grid-row:3;font-size:6px}.time-label{grid-column:2;grid-row:1;margin:0}.segments{grid-column:2;grid-row:2/4;margin-top:7px}.segments button{padding:6px}.setting-row{margin-top:12px;font-size:9px}.sidebar-note{display:none}#scene{left:0;top:160px;width:100%;height:calc(100svh - 380px);min-height:320px}.scene-meta{top:226px;left:22px;right:auto;gap:5px}.meta-label{font-size:6px}.scene-meta strong{font-size:9px}.meta-description{display:none}.scene-tools{top:225px;right:21px}.scene-caption{top:auto;bottom:268px;left:23px;font-size:7px}.grab-hint{display:none}.experiments{position:absolute;bottom:65px;left:20px;transform:none;width:calc(100% - 40px);padding:4px;gap:1px}.experiment{padding:19px 8px 15px;gap:6px}.experiment>svg{flex-basis:22px;width:22px}.experiment strong{font-size:9px}.experiment small{font-size:5px;letter-spacing:0;margin-top:5px}.experiment-number{font-size:6px;top:5px;left:7px}.experiment-dot{right:6px;top:7px}.footer{left:20px;right:20px;height:43px;font-size:6px;letter-spacing:.3px}.footer>div{gap:10px;margin:0}.footer>div>span{gap:4px}.footer>div>span:last-child{display:none}.loading,.error-panel{left:50%;top:43%}.toast{left:50%;bottom:270px;white-space:nowrap}.error-panel{padding:25px}.scene-meta,.scene-tools,.scene-caption,.experiments,.footer{z-index:2}}
@media(min-width:761px){#scene{mask-image:linear-gradient(to right,transparent,#000 80px)}}
body{position:relative}
@media(max-height:679px){body{overflow-y:auto}}
@media(max-width:760px){body{--app-height:max(100svh,740px)}.settings{top:calc(var(--app-height) - 341px)}#scene{height:calc(var(--app-height) - 380px)}}
@media(min-width:1101px){.experiment small{font-size:7px;letter-spacing:.45px}}
@media(max-width:760px){#scene{mask-image:linear-gradient(to bottom,transparent,#000 28px,#000 calc(100% - 55px),transparent)}.experiment small{display:none}.experiment strong{font-size:10px;white-space:normal;line-height:1.35}.experiment{min-height:64px}.secondary-actions button{min-height:36px}.segments button{min-height:28px}}
@media(max-height:790px) and (min-width:761px){.sidebar-note{display:none}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}.loading-spinner{animation-duration:2s}}

/* Legible annotations keep the experiment in focus at both viewport sizes. */
.intro{max-width:240px;color:#666b62}.meta-label{font-size:9px;color:#606b5b;letter-spacing:1.2px}.meta-description{font-size:10px;color:#64705e}.scene-caption{font-size:10px;color:#53604b}.scene-meta strong{font-size:12px}.experiment strong{font-size:12px}.experiment small{font-size:8px;color:#66705e}.scene-meta{padding:10px 12px;background:rgba(238,239,231,.72);border:1px solid rgba(255,255,255,.35);border-radius:4px;backdrop-filter:blur(8px)}
@media(max-width:760px){.scene-meta{top:222px;left:20px;padding:7px 9px;gap:4px}.meta-label{font-size:8px}.scene-meta strong{font-size:10px}.scene-caption{font-size:9px}.experiment strong{font-size:11px}.scene-tools{top:225px}.scene-meta .meta-description{display:none}}

.scene-caption{background:rgba(238,239,231,.8);padding:8px 10px;border-radius:3px;backdrop-filter:blur(8px)}

@media(max-width:760px){.secondary-actions{padding:0 5px;border-radius:3px;background:rgba(238,239,231,.92)}.secondary-actions button{color:#4f5949}}

@media(max-width:760px){.secondary-actions{transform:translateY(-12px)}}

/* Small experiment labels stay readable over the pale laboratory floor. */
.experiment-number{color:#606a55}.experiment>svg{stroke:#66745b}
@media(max-width:760px){.experiment strong{font-size:12px;color:#30392b}.experiment-number{font-size:8px}.experiment{gap:5px;padding-left:7px;padding-right:7px}}

/* Hallmark: editorial laboratory controls; existing paper/orange palette.
   Structure: quiet header, primary action rail, experiment dock, footer status. */
:root{--font-body:Lab,'Segoe UI',Arial,sans-serif;--font-mono:Consolas,monospace;--surface:#f4f3ed;--surface-hover:#faf9f4;--surface-active:#dedfd5;--muted-strong:#687064;--control-border:#bec3b5;--panel-shadow:#2632221a;--overlay:#26322238;--on-accent:#fff;--action-accent:#cb4018;--action-hover:#b73914;--status-rest:#6c825d;--focus-ring:#9f3518;--transparent:transparent;--app-height:max(100svh,680px);font-family:var(--font-body)}
html,body{min-width:0;overflow-x:clip}body{position:relative;height:var(--app-height);min-height:680px;overflow-y:auto}
button,a,input,select{touch-action:manipulation}button{transition:background .16s,color .16s,border-color .16s}button:active:not(:disabled){transform:translateY(1px)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--focus-ring);outline-offset:4px}
.topbar{height:80px;margin:0 40px}.masthead{margin:0;font-size:9px;color:var(--muted-strong)}
.options-button{display:flex;align-items:center;justify-content:center;gap:9px;min-height:42px;padding:0 15px;border:1px solid var(--control-border);border-radius:6px;background:var(--transparent);font-size:12px;font-weight:600;white-space:nowrap}.options-button svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:1.5}.options-button:hover,.options-button[aria-expanded=true]{background:var(--surface)}
#scene{left:280px;top:80px;width:calc(100% - 280px);height:calc(var(--app-height) - 140px);min-height:0;mask-image:linear-gradient(to right,var(--transparent),var(--ink) 70px)}
.sidebar{position:absolute;left:40px;top:clamp(120px,18svh,174px);width:260px;display:block;pointer-events:auto}.eyebrow{font-size:8px;color:var(--muted-strong);letter-spacing:1.2px}h1{font-size:54px;line-height:1.02;letter-spacing:-2.6px;margin:22px 0 18px;min-width:0;overflow-wrap:anywhere}h1 em{font-style:normal}.intro{font-size:12px;line-height:1.75;color:var(--muted-strong);margin:0 0 26px;max-width:246px}
.control-stack{display:block}.primary-button{background:var(--action-accent);color:var(--on-accent);min-height:52px;border-radius:6px;padding:15px 16px;justify-content:flex-start;box-shadow:none;gap:11px}.primary-button span{font-size:13px}.primary-button kbd{font-size:8px}.primary-button:hover{background:var(--action-hover);transform:none}.secondary-actions{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:8px;margin:9px 0 24px;padding:0;background:none;transform:none}.secondary-actions button{min-height:42px;padding:0 8px;border:1px solid var(--control-border);border-radius:5px;background:var(--transparent);color:var(--ink);font-size:12px;white-space:nowrap}.secondary-actions button:hover{background:var(--surface);color:var(--ink)}.secondary-actions button span{margin-right:4px;font-size:18px}
.settings{position:static;display:block;width:auto;padding-top:20px;border-top:1px solid var(--line)}.setting-label{font-size:12px}.setting-label>span:last-child{font-size:12px}.settings input[type=range]{--gravity-fill:49.05%;display:block;width:100%;height:4px;margin:23px 0 16px;background:linear-gradient(to right,var(--orange) var(--gravity-fill),var(--control-border) var(--gravity-fill));touch-action:pan-y}.settings input[type=range]::-webkit-slider-thumb{width:16px;height:16px;border-width:3px}.settings input[type=range]::-moz-range-thumb{width:12px;height:12px;border-width:3px}.range-labels{font-size:8px;color:var(--muted-strong)}
.experiments{bottom:85px;left:calc(50% + 140px);width:min(630px,calc(100% - 380px));padding:5px;gap:4px;background:var(--surface);border:1px solid var(--control-border);border-radius:8px;box-shadow:0 5px 24px var(--panel-shadow);backdrop-filter:none}.experiment{padding:23px 14px 17px;gap:10px;min-height:76px}.experiment.active{background:var(--surface-hover);border-color:var(--control-border);box-shadow:none}.experiment:hover{background:var(--surface-hover)}.experiment strong{font-size:12px;color:var(--ink)}.experiment small{font-size:8px;color:var(--muted-strong)}.experiment-number{font-size:8px;color:var(--muted-strong)}.experiment>svg{stroke:var(--muted-strong)}
.grab-hint{font-size:9px;bottom:185px;left:calc(50% + 140px);color:var(--muted-strong)}
.footer{left:40px;right:40px;bottom:0;height:60px;display:flex;justify-content:space-between;align-items:center;font-size:10px;letter-spacing:.5px;z-index:2}.footer-credit{display:flex;align-items:center;gap:8px}.footer-credit a{font-family:var(--font-body);font-size:12px;color:var(--muted-strong);letter-spacing:0;text-decoration:none;padding:10px 0}.footer-credit a:hover{text-decoration:underline;text-underline-offset:4px}.footer-engine{color:var(--muted-strong);font-size:9px}.footer .scene-caption{position:static;display:flex;align-items:center;gap:9px;padding:0;margin:0;transform:none;background:none;border:0;border-radius:0;font:10px var(--font-mono);color:var(--muted-strong);white-space:nowrap}.caption-line{width:24px;background:var(--control-border)}.state-dot{width:5px;height:5px;border-radius:50%;background:var(--status-rest)}.scene-caption[data-state=live] .state-dot{background:var(--orange)}
.options-dialog{position:fixed;left:auto;right:24px;top:88px;bottom:auto;margin:0;width:min(420px,calc(100% - 32px));max-height:calc(100svh - 112px);overflow-y:auto;border:1px solid var(--control-border);border-radius:12px;padding:26px;color:var(--ink);background:var(--surface);box-shadow:0 16px 64px var(--panel-shadow)}.options-dialog::backdrop{background:var(--overlay);backdrop-filter:blur(2px)}.options-heading{display:flex;justify-content:space-between;align-items:center;gap:12px}.options-heading h2{font-size:25px;line-height:1.15;letter-spacing:-.8px;margin:9px 0 0}.close-options{flex-shrink:0;width:44px;height:44px;border:1px solid var(--control-border);border-radius:50%;background:var(--transparent);font-size:24px}.close-options:hover{background:var(--surface-active)}.option-section{margin-top:24px;padding-top:22px;border-top:1px solid var(--line)}.options-dialog .setting-label{font-size:13px}.options-dialog output{font:12px var(--font-mono);color:var(--muted-strong)}.options-dialog .segments{display:flex;position:static;margin-top:13px;padding:4px;border-color:var(--control-border)}.options-dialog .segments button{min-height:40px;font-size:12px}.options-dialog .setting-row{margin-top:0;min-height:58px;font-size:13px}.options-dialog .setting-row input{width:36px;height:22px}.options-dialog .setting-row input:after{width:16px;height:16px;top:3px;left:3px}.options-dialog .setting-row input:checked:after{transform:translateX(14px)}.options-dialog select{font-size:13px;max-width:none;min-height:44px;padding:8px;color:var(--ink)}.option-label{font:9px var(--font-mono);letter-spacing:1px;color:var(--muted-strong)}.option-actions{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:8px;margin-top:12px}.option-actions button,.help-button{min-height:44px;border:1px solid var(--control-border);border-radius:5px;font-size:12px;background:var(--transparent);white-space:nowrap}.option-actions button:hover,.help-button:hover,.option-actions button[aria-pressed=true]{background:var(--surface-active)}.help-button{display:flex;justify-content:space-between;align-items:center;width:100%;margin-top:10px;padding:0 12px}.options-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;border-top:1px solid var(--line);margin-top:24px;padding-top:20px;font:9px var(--font-mono);color:var(--muted-strong)}.options-foot .live-status{min-width:0;font-size:9px;gap:6px}.options-foot .status-separator{margin:0 3px}.loading,.error-panel{left:calc(50% + 140px);top:42%}.toast{left:calc(50% + 140px);bottom:180px}
@media(max-width:900px){
  :root{--app-height:max(100svh,640px)}body{display:grid;grid-template-rows:64px 84px minmax(190px,1fr) auto 72px 50px;min-height:640px}.topbar{grid-row:1;height:64px;margin:0 20px}.brand{font-size:21px}.brand-mark{width:29px;height:29px;font-size:29px}.masthead{display:none}.options-button{min-height:40px;font-size:12px;padding:0 12px}
  .sidebar{position:static;display:contents}.sidebar>.eyebrow{display:none}.sidebar h1{position:static;grid-row:2;align-self:center;width:auto;max-width:100%;margin:8px 20px;font-size:32px;line-height:1.04;letter-spacing:-1.5px;pointer-events:none}.sidebar h1 br{display:none}.intro{display:none}
  #scene{position:relative;grid-row:3;left:auto;top:auto;width:100%;height:100%;min-height:190px;mask-image:linear-gradient(to bottom,var(--transparent),var(--ink) 20px,var(--ink) calc(100% - 25px),var(--transparent))}
  .control-stack{position:static;grid-row:4;margin:12px 20px 10px;width:auto;display:block;z-index:2}.primary-button{min-height:46px;height:46px;justify-content:center}.primary-button kbd{display:none}.secondary-actions{grid-template-columns:minmax(0,1fr) minmax(0,1fr);margin:8px 0 14px;gap:8px}.secondary-actions button{min-height:40px}.settings{display:block;position:static;padding-top:13px;width:100%}.setting-label{font-size:11px}.settings input[type=range]{height:28px;margin:6px 0 0;background-size:100% 4px;background-repeat:no-repeat;background-position:center}.range-labels{font-size:7px}.setting-label small{font-size:10px}
  .experiments{position:relative;grid-row:5;left:auto;right:auto;bottom:auto;transform:none;width:auto;margin:0 20px 8px;padding:4px;gap:3px;border-radius:7px}.experiment{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;min-height:54px;padding:8px 3px}.experiment>svg,.experiment small,.experiment-dot{display:none}.experiment-number{position:static;font-size:8px}.experiment strong{font-size:12px;white-space:nowrap;line-height:1.2}.grab-hint{display:none}
  .footer{position:relative;grid-row:6;left:auto;right:auto;bottom:auto;margin:0 20px;height:50px;gap:8px}.footer-engine{display:none}.footer-credit a{font-size:11px}.footer .scene-caption{font-size:9px;gap:7px}.footer .caption-line{display:none}.footer #sim-time{display:inline}
  .options-dialog{left:0;right:0;top:auto;bottom:0;margin:0;width:100%;max-width:100%;max-height:90svh;padding:24px 22px max(24px,env(safe-area-inset-bottom));border-radius:18px 18px 0 0}.options-heading h2{font-size:26px}.loading,.error-panel{left:50%;top:38%}.toast{left:50%;bottom:340px;max-width:calc(100% - 32px);white-space:normal;text-align:center}
}
@media(max-width:360px){.topbar{margin:0 16px}.control-stack,.experiments,.footer{margin-left:16px;margin-right:16px}.sidebar h1{margin-left:16px;margin-right:16px}.experiment strong{font-size:11px}.options-dialog{padding-left:18px;padding-right:18px}.footer .scene-caption{font-size:8px}}
@media(max-width:900px) and (max-height:540px) and (orientation:landscape){
  :root{--app-height:max(100svh,390px)}body{min-height:390px;grid-template-columns:260px minmax(0,1fr);grid-template-rows:56px 56px minmax(170px,1fr) 64px 44px}.topbar{grid-column:1/-1;height:56px}.sidebar h1{grid-row:2;grid-column:1;margin:4px 16px;font-size:25px}.control-stack{grid-row:3;grid-column:1;margin:4px 16px}.primary-button{min-height:40px;height:40px}.secondary-actions{margin:6px 0 10px;gap:6px}.secondary-actions button{min-height:34px;font-size:11px}.settings{padding-top:10px}.settings input[type=range]{height:28px;margin:4px 0 0}.range-labels{display:none}#scene{grid-row:2/4;grid-column:2;min-height:0}.experiments{grid-row:4;grid-column:1/-1;margin:0 16px 6px}.experiment{min-height:48px}.footer{grid-row:5;grid-column:1/-1;height:44px;margin:0 16px}
}
@media(prefers-reduced-motion:reduce){button{transition:none}}