/* SPDX-License-Identifier: AGPL-3.0-only */
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@media(min-width:1600px){.manual-shell{max-width:1420px;grid-template-columns:255px minmax(0,900px);gap:95px}}@media(max-width:1000px){.manual-shell{grid-template-columns:200px minmax(0,1fr);gap:32px;padding:0 28px}.top nav{gap:16px}.wordmark span{display:none}.screen-pair{gap:10px}.screen{padding:12px}.screen-pair .screen{padding:8px}.manual-hero{padding-top:50px}}@media(max-width:760px){html{scroll-padding-top:130px}.top{padding:16px 20px;min-height:69px;flex-wrap:wrap;gap:12px}.wordmark{font-size:17px}.top nav{gap:14px;font-size:8px}.print{padding:5px 8px;font-size:8px}.manual-shell{display:block;padding:0 22px}.toc-toggle{display:flex;position:sticky;top:69px;width:calc(100% + 44px);margin-left:-22px;z-index:18}.contents{display:none;position:fixed;top:113px;left:0;width:100%;height:calc(100dvh - 113px);background:#101212;padding:25px;z-index:19;overflow:auto}.nav-open .contents{display:block}.nav-open{overflow:hidden}.contents nav a{font-size:13px;padding:11px}.contents label{font-size:9px}.manual-hero{padding:45px 0 36px}h1{font-size:54px;letter-spacing:-3px}.lead{font-size:21px}.lead span{white-space:normal}.manual-meta{gap:12px;font-size:7px}.chapter{padding:40px 0;scroll-margin-top:130px}.chapter h2{font-size:31px;letter-spacing:-1.2px}.chapter h3{font-size:21px}.chapter p,.chapter li{font-size:14px}.route{font-size:9px}.note{padding:17px 18px;font-size:12px}.screen-pair{grid-template-columns:1fr;gap:0}.screen-pair .screen,.screen{max-width:480px;margin:16px 0}.screen-pair figcaption{font-size:9px}.start-card{padding:23px}.start-card strong{font-size:26px}.roll-grid>div{padding:12px 4px}.roll-grid span{font-size:10px}.kit-list{grid-template-columns:1fr}.engine-cards{grid-template-columns:1fr}.engine-cards article{display:grid;grid-template-columns:1fr 1fr;align-items:center}.engine-cards article img{margin:0}.engine-cards article>div{border-top:0;border-left:1px solid #333;padding:12px}.engine-cards h3{font-size:22px}.engine-cards p{font-size:11px}.quickstart{padding:0 22px}.quickstart h1{font-size:54px}.tutorial-progress{padding:13px}.tutorial-progress button{font-size:8px}.table-wrap{margin:20px 0}th,td{padding:12px}td{font-size:12px}footer{padding:25px 22px;flex-direction:column;gap:15px}.top nav a:first-child{display:none}.attribution{font-size:11px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}@media print{html{color-scheme:light;scroll-padding:0}body{background:white;color:#111;font:10pt/1.5 Arial}.top,.contents,.toc-toggle,.print,.permalink,.back-link,.done,.tutorial-progress,.skip,dialog,footer>a{display:none!important}.manual-shell,.quickstart{display:block;padding:0;max-width:none}.manual-hero{padding:0 0 20px}.manual-meta{color:#555}h1,.quickstart h1{font-size:36pt;color:#111;letter-spacing:-2px}.lead{font-size:16pt}.chapter{padding:25px 0;break-before:auto;border-color:#aaa}.chapter h2{font-size:23pt;color:#111;break-after:avoid}.chapter h3{font-size:15pt;color:#111;break-after:avoid}.chapter p,.chapter li,.chapter b,.chapter strong,.attribution{color:#222}.screen,.screen-pair{break-inside:avoid}.screen{max-width:300px;background:white;border-color:#aaa}.screen-pair .screen{max-width:300px}.screen-pair{display:flex;gap:20px}.screen figcaption{color:#444}.table-wrap{overflow:visible;border-color:#aaa}table{font-size:9pt}thead{background:#eee;display:table-header-group}th,td,td:first-child{color:#111;border-color:#aaa}tr{break-inside:avoid}.note{color:#222;background:#f3f3f3;border-color:#777}.route{color:#111!important;border-color:#777}.start-card{background:#f5f5f5;color:#111}.start-card strong,.start-card>span:last-child,.mono,.eyebrow{color:#333}.roll-grid>div{background:#eee;color:#111}.roll-grid span{color:#111}.engine-cards{grid-template-columns:repeat(2,1fr)}.engine-cards article{break-inside:avoid;background:white}.engine-cards article>div{border-color:#aaa}.engine-cards article h3,.engine-cards article p{color:#111}.origin-links a{color:#111}details:not([open])>div{display:block}footer{font-size:8pt;color:#444;padding:20px 0}.kit-list span{color:#333}a{color:#111}code{color:#111}.chapter li{font-size:10pt}.chapter p{font-size:10pt}figure img{max-width:260px}}
/* Current engine sculptures: lazy, silent, pausable production UI examples. */
[hidden]{display:none!important}.motion-screen{position:relative;line-height:0;width:100%;aspect-ratio:4/3;background:#000;overflow:hidden}.motion-screen canvas{position:absolute;inset:0;width:100%;height:100%;image-rendering:pixelated}.screen .motion-screen img{width:100%;height:auto;margin:0}.motion-toggle,[data-motion-group-toggle]{border:1px solid #555;background:#121414;color:#ddd;padding:9px 12px;font:9px/1.4 var(--mono);letter-spacing:.5px}.motion-toggle{margin-top:14px}.motion-toggle:hover,[data-motion-group-toggle]:hover{border-color:white;color:white}.motion-toolbar{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin:25px 0 10px}.motion-toolbar span{font:8px/1.6 var(--mono);color:#999}.engine-cards article>.motion-screen{border:0;padding:0;max-width:320px;margin:15px auto}.engine-cards article .motion-screen img{margin:0;width:100%;height:auto}.motion-example{max-width:480px}.motion-example figcaption{margin-top:15px}@media(max-width:760px){.engine-cards article>.motion-screen{border:0;padding:0;margin:0}.motion-toolbar span{font-size:7px}}@media print{.motion-screen canvas,.motion-toggle,.motion-toolbar{display:none!important}.motion-screen img{display:block!important}.motion-screen{aspect-ratio:auto}}

.boot-screen{position:relative;aspect-ratio:4/3;background:#000}.boot-screen img,.boot-screen canvas{width:100%;height:100%;image-rendering:pixelated;object-fit:contain}.boot-screen canvas{position:absolute;inset:0}.boot-preview button{background:transparent;color:inherit;border:1px solid #444;font:10px monospace;padding:12px 16px;cursor:pointer}.boot-preview button:focus-visible{outline:2px solid currentColor;outline-offset:4px}@media print{.boot-screen canvas,.boot-preview button{display:none!important}}

footer{flex-wrap:wrap;gap:18px}footer>a{font:9px monospace;letter-spacing:.04em}

@media(min-width:1101px){.contents{top:95px}}@media(min-width:901px) and (max-width:1100px){.contents{top:135px}}

/* First-session navigation: explicit actions, one reading column on every screen. */
.start-links{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0}.start-links a{border:1px solid #777;padding:11px 14px;font:10px/1.5 var(--mono);color:#eee}.start-links a:first-child{background:#eee;color:#111}.workflow-start{border:1px solid #686b6b;padding:26px;margin:24px 0 32px;background:#111313}.workflow-start h2,.workflow-start h3{margin:10px 0 22px;font-size:26px;line-height:1.2;letter-spacing:-.6px}.workflow-start ol{padding-left:22px}.workflow-start li{margin:14px 0}.workflow-steps{list-style:none;counter-reset:route;padding:0!important}.workflow-steps li{counter-increment:route;display:grid;grid-template-columns:100px minmax(0,1fr);gap:12px;border-top:1px solid #333;padding-top:15px}.workflow-steps strong:before{content:counter(route,decimal-leading-zero) ' / ';color:#999}.workflow-steps strong{font:10px/1.6 var(--mono);letter-spacing:.05em}.workflow-steps span{font-size:14px;line-height:1.7}.workflow-alert{border-left:3px solid #eee;padding:10px 0 10px 16px!important;color:#eee!important}.beta-route{border-color:#eee}#track-basics,#track-type,#track-recovery{scroll-margin-top:160px}@media(max-width:760px){.workflow-start{padding:20px 17px}.workflow-steps li{grid-template-columns:1fr;gap:5px}.workflow-start h2,.workflow-start h3{font-size:23px}.start-links a{font-size:9px}}@media print{.workflow-start{background:white;border-color:#777;break-inside:auto}.workflow-start h2,.workflow-start h3,.workflow-alert{color:#111!important}.workflow-steps li{break-inside:avoid}.start-links a{color:#111;background:white!important}.workflow-alert{border-color:#111}}

/* First-session title and early manual invitation. */
.quickstart .manual-hero h1{font-size:clamp(44px,6.4vw,76px);line-height:1.04;letter-spacing:-3.4px}.groove-start-card{margin:28px 0 24px}.groove-start-card strong{font-size:clamp(27px,3vw,37px);line-height:1.12;letter-spacing:-1px}.groove-start-card>span:last-child{max-width:620px;line-height:1.65}@media(max-width:760px){.quickstart .manual-hero h1{font-size:43px;letter-spacing:-2px}.groove-start-card strong{font-size:29px}}@media print{.quickstart .manual-hero h1{font-size:30pt;letter-spacing:-1.5pt}}
@media(max-width:760px){.quickstart .manual-hero h1{font-size:clamp(31px,9vw,42px);letter-spacing:-1.7px}}