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*{box-sizing:border-box}html{color-scheme:dark;scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 system-ui,-apple-system,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}button,input{font:inherit}button,a,input{touch-action:manipulation}a{color:inherit}img{display:block;max-width:100%;height:auto}button{color:inherit;cursor:pointer}[hidden]{display:none!important}h1,h2,h3,p,figure{margin:0}p+p{margin-top:16px}h1,h2,h3{font-weight:650;letter-spacing:-.035em;line-height:1.15}h2{font-size:clamp(30px,3.4vw,44px)}h3{font-size:21px}strong,b{font-weight:650}:focus-visible{outline:3px solid var(--accent);outline-offset:4px}::selection{background:#4da3ff44}code{font:13px/1.6 ui-monospace,Consolas,monospace;background:#222b37;padding:3px 6px;border-radius:5px;overflow-wrap:anywhere}pre{overflow:auto;background:#0b0e13;border:1px solid var(--line);border-radius:10px;padding:18px}pre code{background:none;padding:0;white-space:pre}ul,ol{padding-left:24px}li+li{margin-top:10px}section,details,.anchor-alias{scroll-margin-top:100px}.wrap{width:min(100%,var(--wrap));margin:auto;padding:0 32px}.skip-link{position:fixed;left:20px;top:-80px;z-index:300;background:var(--accent);color:#081321;padding:12px}.skip-link:focus{top:12px}
.site-head{position:sticky;top:0;z-index:50;background:#0e1117f5;border-bottom:1px solid #242d39;backdrop-filter:blur(14px)}.site-head .wrap{display:flex;align-items:center;gap:20px;min-height:78px}.head-mark{display:block;flex-shrink:0}.head-mark img{width:44px;height:44px;object-fit:contain}.head-tag{font-size:12px;color:var(--dim);letter-spacing:.06em}.head-nav{margin-left:auto;display:flex;align-items:center;gap:24px}.head-nav>a{text-decoration:none;font-size:13px;font-weight:600;color:var(--dim)}.head-nav>a[aria-current=page]{color:var(--text)}.head-nav .btn{color:#071422}.btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:9px;padding:12px 20px;text-decoration:none;font-weight:600;font-size:14px;line-height:1.4;transition:background .15s}.btn-primary{background:var(--accent);border-color:var(--accent);color:#071422}.btn-primary:hover{background:#76b8ff}.btn-secondary{background:#19212c;color:var(--text)}.btn-secondary:hover{background:#263140}.actions{display:flex;gap:12px;flex-wrap:wrap}.eyebrow{font-size:11px;letter-spacing:.15em;text-transform:uppercase;font-weight:650;color:var(--accent);margin-bottom:18px}.accent-text{color:#72b6ff}.quiet,.caption-note{color:var(--faint);font-size:13px}.text-link{display:inline-block;color:#8fc7ff;font-weight:550;text-decoration:none;margin-top:18px;font-size:14px}.text-link:hover{text-decoration:underline}
.pitch-page main>section{padding:90px 0}.pitch-page main>.hero{padding:88px 0 72px;background:radial-gradient(ellipse at 80% 20%,#1b2e4c70,transparent 55%)}.hero-grid{display:grid;grid-template-columns:1fr 1.08fr;gap:50px;align-items:center}.hero h1{font-size:clamp(40px,4.8vw,65px);line-height:1.03;letter-spacing:-.05em}.hero-lead{font-size:17px;color:var(--dim);margin:25px 0 24px;max-width:48ch;line-height:1.65}.hero-facts{display:flex;gap:24px;flex-wrap:wrap;margin-bottom:28px;font-size:12px;color:var(--dim)}.hero-facts b{display:block;color:var(--text);font-size:25px;line-height:1.2;margin-bottom:3px}.hero .quiet{margin-top:20px}.hero-media{position:relative;padding:14px 25px 50px 0}.hero-media>.shot-figure{box-shadow:0 20px 60px #0006}.hero-media>.shot-figure figcaption{margin-left:5px}.hero-phone{position:absolute;width:24%;right:-7px;bottom:0}.hero-phone figcaption{display:none}.hero-phone .shot-open{border-radius:18px;border:6px solid #0a0d12;box-shadow:0 16px 40px #0008}.section-alt{background:var(--bg-2);border-top:1px solid #202936;border-bottom:1px solid #202936}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:40px;margin-bottom:28px}.section-heading>p{max-width:42ch;color:var(--dim);font-size:15px}.surface-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:36px}.surface-grid article{display:flex;flex-direction:column;min-width:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px}.mini-label{font-size:11px;text-transform:uppercase;letter-spacing:.12em;color:var(--faint);margin-bottom:8px}.surface-grid h3{margin-bottom:22px}.surface-grid .shot-figure{margin-bottom:20px}.surface-grid .phone-figure{width:125px;align-self:center}.surface-grid p{font-size:14px;color:var(--dim);margin-top:auto}.shot-figure{min-width:0}.shot-open{display:block;width:100%;padding:0;background:#0a0d12;border:1px solid #39414e;border-radius:10px;overflow:hidden;position:relative}.shot-open::after{content:"↗";position:absolute;right:9px;top:9px;width:24px;height:24px;display:grid;place-items:center;border-radius:6px;background:#0e1117dd;color:#fff;opacity:0;transition:opacity .15s}.shot-open:hover::after,.shot-open:focus-visible::after{opacity:1}.shot-open img{width:100%}figcaption{font-size:11px;color:var(--faint);margin-top:10px;line-height:1.5}.phone-figure{max-width:250px;margin-inline:auto}.phone-figure .shot-open{border-radius:15px}.split{display:grid;grid-template-columns:1fr 1.12fr;gap:64px;align-items:center}.split h2{margin-bottom:24px}.split p{color:var(--dim);font-size:15px}.split .app-figure{min-width:0}.ticks{list-style:none;padding:0;margin:22px 0 0}.ticks li{position:relative;padding-left:23px;color:var(--dim);font-size:14px}.ticks li::before{content:"✓";position:absolute;left:0;color:var(--accent)}
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.lb,.gm{position:fixed;inset:0;z-index:110;background:#06080df2;display:flex;align-items:center;justify-content:center;padding:30px}.lb{flex-direction:column;gap:16px;z-index:120}.lb>img{max-width:94vw;max-height:85vh;width:auto;object-fit:contain;border-radius:7px}.lb>p{color:var(--dim);font-size:12px;text-align:center}.lb-x,.dialog-close{position:absolute;right:20px;top:16px;width:38px;height:38px;border:1px solid #526073;background:#253144;color:#fff;border-radius:8px;font-size:25px;line-height:1}.gm-panel{position:relative;width:min(100%,1120px);max-height:92vh;overflow:auto;background:var(--bg-2);border:1px solid var(--line);border-radius:16px}.gm-head{position:relative;padding:34px 74px 24px 34px;border-bottom:1px solid var(--line)}.gm-head h2{font-size:35px;margin-bottom:15px}.gm-head>p:last-child{font-size:15px;max-width:70ch;color:var(--dim)}.gm-body{padding:30px 34px 34px}.gm-gallery{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:23px;align-items:start}.gm-gallery .phone-figure{width:160px;grid-row:span 2}.gm-gallery .wall-figure{align-self:center}.gm-cols{display:grid;grid-template-columns:1.2fr 1fr;gap:50px;margin-top:30px}.gm-cols h3{font-size:18px;margin-bottom:15px}.gm-cols dl{display:grid;grid-template-columns:100px 1fr;gap:12px;margin:0;font-size:13px}.gm-cols dt{color:var(--faint)}.gm-cols dd{margin:0}.gm-cols .ticks{margin:0}
.docs-layout{display:grid;grid-template-columns:245px minmax(0,1fr);gap:56px;padding-top:50px;padding-bottom:70px}.docs-sidebar{position:sticky;top:112px;align-self:start;max-height:calc(100vh - 132px);display:flex;flex-direction:column;min-width:0}.docs-sidebar>label{font-size:11px;color:var(--dim);font-weight:600;letter-spacing:.05em;margin-bottom:9px}.docs-search{position:relative}.docs-search input{width:100%;font-size:12px;color:var(--text);padding:12px 30px 12px 12px;background:#181f29;border:1px solid #3b495b;border-radius:8px}.docs-search button{position:absolute;right:6px;top:6px;width:27px;height:27px;border:0;background:#283344;border-radius:5px;font-size:19px}.search-status{font-size:10px;color:var(--accent);min-height:18px;margin:8px 0}.docs-toc{overflow:auto;scrollbar-width:thin;scrollbar-color:#48556a transparent}.docs-toc>summary{font-size:12px;font-weight:650;padding:9px 0;cursor:pointer;color:var(--dim)}.docs-nav{display:flex;flex-direction:column;gap:3px;padding-bottom:10px}.docs-nav a{font-size:11px;color:var(--faint);padding:7px 10px;text-decoration:none;border-left:2px solid #273240;line-height:1.45}.docs-nav a:hover,.docs-nav a:focus-visible{background:#1d2b3e;color:#b8d9ff;border-left-color:var(--accent)}.docs-intro{padding-bottom:38px;border-bottom:1px solid var(--line);margin-bottom:38px}.docs-intro h1{font-size:clamp(34px,4vw,50px);margin-bottom:20px}.docs-lede{font-size:16px;color:var(--dim);max-width:72ch}.task-links{display:flex;gap:9px;flex-wrap:wrap;margin-top:24px}.task-links a{border:1px solid #36455a;border-radius:7px;background:#182333;color:#c3daf4;padding:7px 12px;font-size:11px;text-decoration:none}.doc-section{position:relative;padding:0 0 42px;margin-bottom:40px;border-bottom:1px solid var(--line);overflow-wrap:anywhere}.doc-section h2{font-size:27px;margin-bottom:23px}.doc-section h3{font-size:18px;margin:25px 0 14px}.doc-section p,.doc-section li{font-size:14px;color:var(--dim)}.doc-section strong{color:var(--text)}.doc-section .shot-figure{margin-top:27px}.doc-section .shot-open img{width:100%}.procedure{padding-left:24px;margin:0 0 22px}.procedure li{padding-left:8px}.procedure li+li{margin-top:17px}.procedure li::marker{color:var(--accent);font-weight:650}.docs-callout{padding:19px 22px;border:1px solid #38506d;border-radius:10px;background:#18273a;font-size:13px!important;color:#c0d2e7!important;margin-top:22px}.definitions{display:grid;grid-template-columns:145px minmax(0,1fr);gap:16px 23px;margin:22px 0}.definitions dt{font-size:13px;font-weight:600;color:var(--text)}.definitions dd{margin:0;font-size:13px;color:var(--dim)}.doc-cards,.checklist{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:25px 0}.doc-cards article,.checklist article{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:19px}.doc-cards h3,.checklist h3{margin:0 0 12px;font-size:16px}.doc-cards p,.checklist li{font-size:12px}.checklist ul{padding-left:16px;margin:0}.flow-line{display:flex;gap:8px;flex-wrap:wrap;margin:22px 0}.flow-line span{border:1px solid #38506d;border-radius:6px;background:#1b2b3f;color:#bfd8f4;font-size:12px;padding:8px 13px}.docs-body table{width:100%;border-collapse:collapse;table-layout:fixed;margin:25px 0;font-size:12px;line-height:1.6}.docs-body th{text-align:left;font-weight:600;color:var(--text);padding:12px 10px;border-bottom:1px solid #586577;background:#1a2432}.docs-body td{padding:14px 10px;color:var(--dim);border-bottom:1px solid var(--line);vertical-align:top;overflow-wrap:anywhere}.docs-body table tr:nth-child(even){background:#141c27}.docs-body th:first-child,.docs-body td:first-child{width:25%;color:var(--text)}.docs-body td code{font-size:11px}.game-guide,.troubleshooting details{border:1px solid var(--line);border-radius:9px;background:var(--surface);margin-top:10px}.game-guide summary,.troubleshooting summary{display:list-item;cursor:pointer;padding:17px 20px;font-size:14px;font-weight:600}.game-guide summary::marker,.troubleshooting summary::marker{color:var(--accent)}.guide-type{float:right;font-size:10px;font-weight:400;color:var(--faint);margin-left:12px;line-height:2}.game-guide-body{padding:0 23px 23px}.game-guide-body h3{font-size:15px;margin-top:23px}.game-guide-body ol{margin-top:10px}.guide-note{border-top:1px solid var(--line);padding-top:15px;margin-top:20px;color:#b6c9e0!important;font-size:12px!important}.troubleshooting details>p,.troubleshooting details>ol{margin:0;padding:0 23px 21px;font-size:13px}.troubleshooting details>ol{padding-left:41px}.anchor-alias{position:absolute;top:0;left:0}
@media(max-width:1100px){.hero-grid{gap:30px}.split{gap:34px}.surface-grid{gap:15px}.games-grid{gap:17px}.game-copy{padding:18px}.docs-layout{gap:32px;grid-template-columns:218px minmax(0,1fr)}.doc-cards,.checklist{grid-template-columns:1fr}.doc-cards article p{font-size:13px}}
@media(max-width:1040px){.docs-layout{grid-template-columns:minmax(0,1fr)}.docs-sidebar{position:static;max-height:none}.docs-toc{max-height:300px;border:1px solid var(--line);border-radius:8px;padding:0 13px}.docs-toc summary{padding:13px 0}.docs-nav{display:grid;grid-template-columns:1fr 1fr}.hero h1{font-size:49px}.surface-grid{grid-template-columns:1fr}.surface-grid article{display:grid;grid-template-columns:1fr 1fr;column-gap:25px}.surface-grid .mini-label,.surface-grid h3{grid-column:1}.surface-grid .shot-figure{grid-column:2;grid-row:1/5;margin:0}.surface-grid .phone-figure{width:115px}.surface-grid p{grid-column:1}.split{grid-template-columns:1fr}.split>.shot-figure,.split>div>.shot-figure{max-width:760px}.games-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:760px){.wrap{padding:0 21px}.site-head .wrap{gap:12px;min-height:68px}.head-tag{display:none}.head-mark img{width:37px;height:37px}.head-nav{gap:17px}.head-nav>a{font-size:11px}.head-nav .btn{padding:9px 11px;font-size:10px}.pitch-page main>section{padding:58px 0}.pitch-page main>.hero{padding:52px 0}.hero-grid{grid-template-columns:1fr;gap:35px}.hero h1{font-size:clamp(39px,8vw,56px)}.hero-lead{font-size:15px}.hero-media{max-width:650px;width:100%;padding-right:40px}.hero-phone{right:0;width:23%}.section-heading{display:block}.section-heading>p{margin-top:20px}.story-grid,.delivery-grid{grid-template-columns:1fr}.surface-grid article{display:flex}.surface-grid .shot-figure{margin:15px 0}.surface-grid .phone-figure{width:150px}.surface-grid p{margin-top:14px}.gm,.lb{padding:12px}.gm-head{padding:25px 58px 20px 21px}.gm-head h2{font-size:28px}.gm-body{padding:22px}.gm-cols{grid-template-columns:1fr;gap:26px}.gm-gallery{grid-template-columns:1fr}.gm-gallery .phone-figure{grid-row:auto;width:175px}.gm-panel{max-height:95vh}.dialog-close{right:12px;top:12px;width:33px;height:33px}.docs-layout{padding-top:25px}.docs-intro h1{font-size:36px}.definitions{grid-template-columns:1fr;gap:7px}.definitions dd{margin-bottom:14px}.docs-body table{font-size:11px}.docs-body th,.docs-body td{padding:11px 7px}.docs-body th:first-child,.docs-body td:first-child{width:29%}.docs-body td code{font-size:10px}.game-guide summary{padding:15px}.guide-type{font-size:9px}.game-guide-body{padding:0 18px 18px}.site-foot .wrap>div{flex-wrap:wrap;gap:9px}.lb>img{max-height:80vh}.btn{padding:11px 16px}}
@media(max-width:480px){.games-grid{grid-template-columns:1fr}.hero-facts{gap:19px}.hero-facts span{font-size:10px}.hero-facts b{font-size:22px}.head-nav{gap:12px}.head-nav .btn{display:none}.game-copy{min-height:160px}.docs-nav{grid-template-columns:1fr}.doc-section h2{font-size:24px}.docs-callout{padding:16px}.task-links a{font-size:10px}.docs-body th:first-child,.docs-body td:first-child{width:33%}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
@media print{body{background:white;color:#111}.site-head,.docs-sidebar,.site-foot,.actions,.task-links,.shot-open::after,.lb,.gm{display:none!important}.docs-layout{display:block}.doc-section{break-inside:avoid}.doc-section p,.doc-section li,.definitions dd{color:#333}.game-guide:not([open]) .game-guide-body{display:block}.shot-open{border:1px solid #ccc}.doc-section h2{font-size:23px}a{color:#111}.pitch-page main>section{padding:25px 0}}

/* Long API examples stay inside the document column on small screens. */
.docs-body{min-width:0}
/* The page already reserves the sticky header via scroll-padding. */
section,details,.anchor-alias{scroll-margin-top:0}

/* The event brief and real Arena/EWC comparisons are shared with the proposal. */
.pitch-page main>.company-brief{padding:52px 0 58px}
.brief-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;margin-top:28px}
.brief-grid article{border-top:2px solid #4da3ff70;padding-top:18px}
.brief-grid h3{font-size:17px;letter-spacing:-.02em;margin-bottom:12px}
.brief-grid p,.brief-foot,.section-lede{color:var(--dim);font-size:14px}
.brief-foot{border-top:1px solid var(--line);padding-top:22px;margin-top:28px}
.brief-foot a{color:#90c6ff;text-decoration:none;white-space:nowrap}
.brief-foot strong{color:var(--text)}
.design-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin-top:32px}
.design-card{min-width:0;border:1px solid var(--line);border-radius:14px;background:var(--surface);padding:25px}
.design-badge{display:inline-block;border:1px solid #47749a;background:#21374c;color:#b4d7ff;padding:3px 9px;border-radius:5px;font-size:10px;margin-bottom:13px}
.design-badge-ewc{border-color:#81623e;background:#3e2d22;color:#efc893}
.design-heading h3{font-size:25px;margin-bottom:12px}
.design-heading p{font-size:13px;line-height:1.6;color:var(--dim);min-height:42px}
.design-screen-pair{display:grid;grid-template-columns:minmax(0,1fr) 106px;gap:16px;align-items:center;margin-top:24px}
.design-screen-pair .phone-figure{width:100%;max-width:none}
.design-screen-pair figcaption{font-size:10px}
.onboarding-grid{display:grid;grid-template-columns:1fr 1fr;gap:75px;align-items:center}
.onboarding-grid h2{margin-bottom:24px}
.onboarding-grid>div>p:not(.eyebrow){font-size:15px;color:var(--dim)}
.onboarding-phones{display:flex;justify-content:center;gap:30px;align-items:start}
.onboarding-phones .phone-figure{width:170px;margin:0}
.scope-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;margin-top:30px}
.scope-grid article{min-width:0;padding:24px;background:var(--surface);border:1px solid var(--line);border-radius:12px}
.scope-grid h3{font-size:19px;margin-bottom:14px}
.scope-grid p{font-size:14px;color:var(--dim)}
.section-lede{margin-top:24px;max-width:80ch}

/* A fixed SVG geometry avoids the font baseline shifting the close mark. */
.lb-x,.dialog-close{display:grid;place-items:center;width:44px;height:44px;padding:0;border:1px solid #455266;border-radius:50%;background:#1b2432;color:#dbe6f5;line-height:1;transition:background .15s,border-color .15s}
.lb-x svg,.dialog-close svg{display:block;width:20px;height:20px;pointer-events:none}
.lb-x:hover,.dialog-close:hover{background:#2b3a50;border-color:#7696bd;color:#fff}
.gm-panel{display:flex;flex-direction:column;overflow:hidden;max-height:calc(100dvh - 60px)}
.gm-head{flex-shrink:0;padding-right:86px}
.gm-body{min-height:0;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin}

@media(max-width:1040px){
 .brief-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
 .design-card{padding:20px}.design-screen-pair{grid-template-columns:minmax(0,1fr) 86px;gap:12px}
 .onboarding-grid{gap:35px}.onboarding-phones{gap:18px}.onboarding-phones .phone-figure{width:140px}
}
@media(max-width:760px){
 .design-grid,.onboarding-grid,.scope-grid{grid-template-columns:minmax(0,1fr)}
 .design-screen-pair{grid-template-columns:minmax(0,1fr) 100px;gap:16px}
 .onboarding-phones{gap:22px}.onboarding-phones .phone-figure{width:145px}
 .gm-panel{max-height:calc(100dvh - 24px)}
 .dialog-close{right:14px;top:14px;width:44px;height:44px}
 .gm-head{padding-right:77px}.lb-x{right:16px;top:16px}
}
@media(max-width:480px){
 .brief-grid{grid-template-columns:minmax(0,1fr);gap:22px}
 .design-card{padding:18px}.design-screen-pair{grid-template-columns:minmax(0,1fr) 83px;gap:12px}
 .design-heading p{min-height:0}.onboarding-phones{gap:18px}.onboarding-phones .phone-figure{width:130px}
 .brief-foot a{white-space:normal}
}