:root{--ink:#122238;--muted:#52647b;--accent:#194cce;--canvas:#f1f5fb;--paper:#fff;--line:#d6e0ef;--soft:#e9effc;--radius:20px}
.experience-note,.post-demo{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:22px;margin:22px 0}.experience-note p{margin:8px 0 0!important;font-size:14px}.post-demo{min-width:0;overflow:hidden}.post-demo blockquote{margin:0 0 20px;padding:0 0 0 16px;border-left:3px solid var(--accent);font-size:15px}.post-demo .twitter-tweet-rendered{margin-inline:auto!important;max-width:100%!important}.post-demo .demo-status{font-size:13px;margin:12px 0 0}.source-link a{font-weight:650}.technology-flow{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;list-style:none;padding:0;margin:24px 0}.technology-flow li{border:1px solid var(--line);border-radius:12px;background:var(--soft);padding:16px}.technology-flow strong,.technology-flow span{display:block}.technology-flow strong{font-size:15px}.technology-flow span{font-size:13px;color:var(--muted);margin-top:6px}.tech-cards{display:grid;gap:12px;margin:24px 0}.tech-cards>div{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:20px}.tech-cards h3{font-size:18px;line-height:1.4;margin:0 0 8px}.tech-cards p{font-size:15px;margin:0!important}.reading code{font-size:.88em;overflow-wrap:anywhere;background:var(--soft);padding:2px 4px;border-radius:4px}.reading a{overflow-wrap:anywhere}
.post-demo .button[hidden]{display:none}
@media(max-width:520px){.technology-flow{grid-template-columns:1fr}.technology-flow li{padding:12px 16px}.experience-note,.post-demo{padding:18px}}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--canvas);color:var(--ink);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.65;font-size:16px}a{color:var(--accent);text-underline-offset:4px}a:hover{color:#10359c}a:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:5px;border-radius:4px}.shell{max-width:1200px;margin:auto;padding:0 32px}.site-header{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:28px 0}.site-name{color:var(--ink);font-weight:800;font-size:19px;line-height:1.3;text-decoration:none}.site-name span{display:block;font-size:12px;font-weight:500;color:var(--muted);margin-top:5px}.header-link{font-size:14px;font-weight:650;padding:12px 0}.hero{display:grid;grid-template-columns:1.25fr 1fr;gap:48px;align-items:center;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:52px 44px}.eyebrow,.section-label{font-size:12px;letter-spacing:.12em;font-weight:750;color:var(--accent);margin:0 0 16px}h1{font-size:clamp(34px,4.2vw,54px);line-height:1.12;letter-spacing:-.035em;margin:0 0 24px;font-weight:800}h1 span{color:var(--accent)}.lead{font-size:18px;color:var(--muted);margin:0 0 24px;max-width:52ch}.actions{display:flex;flex-wrap:wrap;gap:12px}.button{display:inline-flex;align-items:center;justify-content:center;gap:12px;min-height:48px;padding:12px 18px;font-weight:650;border-radius:10px;text-decoration:none;font-size:14px;transition:background .18s,color .18s}.primary{background:var(--accent);color:#fff}.primary:hover{background:#10359c;color:#fff}.secondary{background:var(--soft);color:var(--accent)}.secondary:hover{background:#dbe6fc}.fine-print{font-size:12px;line-height:1.6;color:var(--muted);margin:14px 0 0;max-width:50ch}.world-flow{background:var(--canvas);border:1px solid var(--line);border-radius:16px;padding:28px}.world-flow ol{list-style:none;margin:0;padding:0}.world-flow li{display:flex;gap:18px;padding:18px 0;border-bottom:1px solid var(--line)}.world-flow li:last-child{border-bottom:0}.step-number{color:var(--accent);font-size:12px;font-weight:750;padding-top:4px}.world-flow strong{font-size:18px}.world-flow li p{font-size:14px;line-height:1.6;color:var(--muted);margin:5px 0 0}.flow-note{color:var(--accent);font-size:12px;font-weight:650;margin:20px 0 0}.contents{display:flex;flex-wrap:wrap;gap:8px 22px;padding:20px 4px;border-bottom:1px solid var(--line)}.contents a{font-size:14px;font-weight:650;display:inline-block;padding:10px 0;text-decoration:none}.contents a:hover{text-decoration:underline}.guide-layout{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:56px;padding:44px 16px}.reading{min-width:0;max-width:740px}.reading section{margin:0 0 44px;scroll-margin-top:28px}.section-label{margin-bottom:8px}.reading h2{font-size:27px;line-height:1.25;letter-spacing:-.02em;margin:0 0 18px}.reading p{color:var(--muted);margin:0 0 16px}.reading strong,.reading b{color:var(--ink)}.instructions{padding-left:23px}.instructions li{padding-left:8px;margin-bottom:20px}.instructions li::marker{color:var(--accent);font-weight:750}.instructions p{margin:5px 0 0}.control-list{background:var(--paper);border:1px solid var(--line);border-radius:14px;overflow:hidden;margin:22px 0}.control-list>div{display:grid;grid-template-columns:170px 1fr;gap:18px;padding:14px 20px;border-bottom:1px solid var(--line)}.control-list>div:last-child{border-bottom:0}dt{font-weight:650}dd{margin:0;color:var(--muted)}kbd{display:inline-block;min-width:26px;text-align:center;margin:0 3px 3px 0;padding:0 5px;background:var(--canvas);border:1px solid var(--line);border-bottom-width:2px;border-radius:5px;font-family:inherit;font-size:13px;color:var(--ink)}.tip{border-left:3px solid var(--accent);padding:4px 0 4px 18px;margin:24px 0}.tip p{margin:6px 0 0}details{background:var(--paper);border:1px solid var(--line);border-radius:12px;margin:10px 0}summary{font-weight:650;padding:18px 20px;cursor:pointer;line-height:1.4}details p{padding:0 20px 18px;margin:0!important}details[open] summary{color:var(--accent)}.sources{border-top:1px solid var(--line);padding-top:30px}.sources h2{font-size:20px}.sources p,.sources li{font-size:14px}.sources ul{padding-left:20px}.sources li{margin-bottom:9px}.sidebar{min-width:0}.reference-card{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:24px;position:sticky;top:24px}.reference-card h2{font-size:26px;letter-spacing:-.02em;line-height:1.2;margin:0 0 18px}.reference-card ul{padding-left:18px;color:var(--muted);font-size:14px;line-height:1.6}.reference-card li{margin-bottom:10px}.reference-card .button{width:100%;margin-top:10px}.reference-note{font-size:13px;color:var(--muted);padding:24px 8px}.reference-note strong{color:var(--ink)}footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;font-size:13px;color:var(--muted);padding:24px 0 36px}footer p{margin:0}.sr-only,.skip-link:not(:focus){position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.skip-link:focus{position:fixed;left:16px;top:12px;z-index:5;background:var(--paper);padding:12px;border:2px solid var(--accent)}
@media(max-width:950px){.hero{gap:28px;padding:36px 28px}.guide-layout{grid-template-columns:minmax(0,1fr) 230px;gap:30px;padding-inline:0}.reference-card{padding:20px}.control-list>div{grid-template-columns:130px 1fr}.world-flow{padding:22px}}
@media(max-width:720px){.shell{padding:0 20px}.site-header{padding:22px 0}.hero{grid-template-columns:1fr;gap:28px;padding:30px 24px}.lead{font-size:17px}.world-flow{padding:20px}.world-flow li{padding:12px 0}.contents{gap:2px 20px}.guide-layout{display:block;padding:32px 0 0}.reading h2{font-size:24px}.reading section{margin-bottom:34px}.reference-card{position:static}.sidebar{margin-bottom:24px}footer{flex-direction:column;gap:10px}.reference-note{padding-bottom:0}}
@media(max-width:400px){.shell{padding:0 14px}.hero{padding:26px 20px}.actions .button{width:100%}.control-list>div{grid-template-columns:1fr;gap:5px;padding:14px 16px}.site-name{font-size:17px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button{transition:none}}
.button{font-family:inherit;border:0;cursor:pointer}.button:focus-visible{outline:3px solid var(--accent);outline-offset:4px}.button:disabled{opacity:.5;cursor:default}.game-section{margin:32px 0 8px;scroll-margin-top:20px}.game-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:0 4px 16px}.game-heading h2{font-size:28px;line-height:1.2;margin:0}.game-heading .section-label{margin-bottom:6px}.game-heading>a{font-size:14px;font-weight:650}.game-player{border:1px solid var(--line);border-radius:16px;overflow:hidden;background:var(--paper)}.game-screen{position:relative;aspect-ratio:16/9;background:#0a101a}.game-screen iframe{display:block;width:100%;height:100%;border:0;background:#0a101a}.game-stopped{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#fff;gap:14px;background:#0a101a}.game-stopped[hidden]{display:none}.game-stopped p{font-size:22px;margin:0}.game-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 16px}.game-toolbar p{margin:0;font-size:13px;color:var(--muted);max-width:52ch}.game-actions{display:flex;gap:8px;flex-shrink:0}.game-actions .button{min-height:44px;padding:10px 14px}.game-note{font-size:13px;line-height:1.6;color:var(--muted);margin:12px 4px}.game-player:fullscreen,.game-player.is-expanded{display:flex;flex-direction:column;width:100%;height:100%;border:0;border-radius:0;background:#0a101a}.game-player.is-expanded{position:fixed;inset:0;width:100vw;height:100dvh;z-index:1000}.game-player:fullscreen .game-screen,.game-player.is-expanded .game-screen{flex:1;min-height:0;aspect-ratio:auto}.game-player:fullscreen .game-toolbar,.game-player.is-expanded .game-toolbar{flex-shrink:0;background:var(--paper);padding-bottom:max(12px,env(safe-area-inset-bottom))}
@media(max-width:720px){.game-toolbar{flex-wrap:wrap;padding:12px}.game-actions{width:100%;justify-content:flex-end}.game-screen{aspect-ratio:4/3}.game-heading h2{font-size:24px}.game-heading .section-label{font-size:10px}.game-note{font-size:12px}.game-player:fullscreen .game-toolbar p,.game-player.is-expanded .game-toolbar p{display:none}}
.game-screen{max-height:calc(100dvh - 180px)}.game-actions{flex-wrap:wrap}.game-player:fullscreen .game-screen,.game-player.is-expanded .game-screen{max-height:none}