@font-face{font-family:Fraunces Variable;font-style:italic;font-display:swap;font-weight:100 900;src:url(/_astro/fraunces-vietnamese-wght-italic.BicUS2cM.woff2)format("woff2-variations");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Fraunces Variable;font-style:italic;font-display:swap;font-weight:100 900;src:url(/_astro/fraunces-latin-ext-wght-italic.BfTTTDIL.woff2)format("woff2-variations");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Fraunces Variable;font-style:italic;font-display:swap;font-weight:100 900;src:url(/_astro/fraunces-latin-wght-italic.Py8at3oI.woff2)format("woff2-variations");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}:root{--bg:#0d0c10;--bg-raise:#17151c;--bg-sunk:#09080b;--line:#2e2b35;--ink:#f4efe6;--ink-soft:#c2bcb1;--ink-mute:#9a948a;--accent:#ff6b81;--accent-ink:#1a0a0e;--accent-text:#ff8fa0;--code-bg:#131118;--gutter:16px;--max:72rem;--radius:14px;color-scheme:light dark}@media (prefers-color-scheme:light){:root{--bg:#f7f2e9;--bg-raise:#fffdf8;--bg-sunk:#ede6d9;--line:#d9d0c1;--ink:#1b1820;--ink-soft:#46424c;--ink-mute:#6a6570;--accent:#b8213f;--accent-ink:#fff8f6;--accent-text:#a41c38;--code-bg:#efe8da}}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}body{background:var(--bg);color:var(--ink);font:400 1.0625rem/1.6 var(--f-text);-webkit-font-smoothing:antialiased;margin:0}img{max-width:100%;height:auto;display:block}a{color:var(--accent-text);text-underline-offset:.2em;text-decoration-thickness:1px}a:hover{text-decoration-thickness:2px}:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:4px}.skip{background:var(--accent);color:var(--accent-ink);z-index:50;padding:10px 16px;position:absolute;top:0;left:-999px}.skip:focus{left:0}.wrap{width:100%;max-width:var(--max);padding-inline:var(--gutter);margin-inline:auto}@media (width>=720px){:root{--gutter:32px}}.top{z-index:5;position:relative}.top__row{justify-content:space-between;align-items:center;gap:16px;padding-block:18px;display:flex}.brand{min-height:44px;color:var(--ink);align-items:center;gap:10px;text-decoration:none;display:inline-flex}.brand__mark{color:var(--accent)}.brand__name{font-family:var(--f-display);letter-spacing:-.01em;font-size:1.45rem;font-weight:600}.nav{gap:4px;margin:0;padding:0;list-style:none;display:flex}.nav a{min-height:44px;color:var(--ink-soft);border-radius:8px;padding:10px 12px;font-weight:500;text-decoration:none;display:inline-block}.nav a:hover,.nav a[aria-current]{color:var(--ink)}.nav a[aria-current]{box-shadow:inset 0 -2px 0 var(--accent);border-radius:0}.btn{border:1.5px solid var(--line);min-height:48px;color:var(--ink);background:0 0;border-radius:999px;align-items:center;gap:8px;padding:12px 22px;font-weight:600;text-decoration:none;display:inline-flex}.btn:hover{border-color:var(--ink-soft)}.btn--solid{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}.btn--solid:hover{filter:brightness(1.08);border-color:var(--accent)}code,kbd,pre{font-family:var(--f-mono)}:not(pre)>code{background:var(--code-bg);border:1px solid var(--line);border-radius:5px;padding:.1em .38em;font-size:.88em}pre{background:var(--code-bg);border:1px solid var(--line);border-radius:var(--radius);margin:0;padding:18px 20px;font-size:.875rem;line-height:1.65;overflow-x:auto}pre code{font-size:inherit;background:0 0;border:0;padding:0}.hero{isolation:isolate;padding:40px 0 0;position:relative;overflow:hidden}.hero__arcs{z-index:-1;width:100%;height:100%;color:var(--accent);opacity:.2;pointer-events:none;position:absolute;inset:auto 0 -2px}.hero h1{font-family:var(--f-display);letter-spacing:-.025em;text-wrap:balance;max-width:14ch;margin:0 0 24px;font-size:clamp(2.5rem,7.4vw,5.6rem);font-weight:560;line-height:1.02}.hero__lede{color:var(--ink-soft);max-width:40rem;margin:0 0 32px;font-size:clamp(1.1rem,2.2vw,1.35rem);line-height:1.5}.hero__cta{flex-wrap:wrap;gap:12px;margin-bottom:8px;display:flex}.hero__meta{font:.8125rem/1.5 var(--f-mono);color:var(--ink-mute);margin:18px 0 0}.stage{max-width:64rem;margin:48px auto 0;position:relative}.stage:before{content:"";background:radial-gradient(60% 70% at 50% 40%, color-mix(in srgb, var(--accent) 38%, transparent), transparent 70%);filter:blur(30px);z-index:-1;position:absolute;inset:8% 6% -6%}.stage__frame{border:1px solid var(--line);background:#000;border-bottom:0;border-radius:18px 18px 0 0;overflow:hidden;box-shadow:0 -10px 60px #00000059}.stage__frame img{width:100%}.stage__cap{color:#d9d4ca;font:.78rem/1.4 var(--f-mono);background:linear-gradient(#0000,#000000c7);padding:60px 16px 14px;position:absolute;bottom:0;left:0;right:0}.stage__cap a{color:#ffb3bf}.sec{border-top:1px solid var(--line);padding:clamp(56px,9vw,112px) 0}.sec--sunk{background:var(--bg-sunk)}.sec__head{gap:12px;max-width:46rem;margin-bottom:40px;display:grid}.sec__head h2{font-family:var(--f-display);letter-spacing:-.02em;text-wrap:balance;margin:0;font-size:clamp(1.9rem,4.4vw,3.1rem);font-weight:560;line-height:1.08}.sec__head p{color:var(--ink-soft);margin:0;font-size:1.125rem}.cols{gap:20px;display:grid}@media (width>=820px){.cols--3{grid-template-columns:repeat(3,1fr)}.cols--2{grid-template-columns:repeat(2,1fr)}.cols--4{grid-template-columns:repeat(4,1fr)}}@media (width>=560px) and (width<=819px){.cols--4{grid-template-columns:repeat(2,1fr)}}.card{background:var(--bg-raise);border:1px solid var(--line);border-radius:var(--radius);flex-direction:column;gap:12px;min-width:0;padding:24px;display:flex}.card h3{font-family:var(--f-display);letter-spacing:-.01em;margin:0;font-size:1.4rem;font-weight:600;line-height:1.2}.card p{color:var(--ink-soft);margin:0}.card .tag{font:600 .8125rem/1 var(--f-text);border:1px solid var(--line);color:var(--ink-mute);border-radius:999px;align-self:flex-start;padding:6px 10px}.card .tag--live{color:var(--accent-text);border-color:color-mix(in srgb, var(--accent) 55%, var(--line))}.card pre{margin-top:auto}.ways{gap:28px;display:grid}@media (width>=900px){.ways{grid-template-columns:repeat(3,1fr)}}.way{border-top:2px solid var(--accent);min-width:0;padding-top:20px;position:relative}.way h3{font-family:var(--f-display);margin:0 0 8px;font-size:1.45rem;font-weight:600}.way p{color:var(--ink-soft);margin:0 0 14px}.ladder{grid-template-columns:repeat(4,1fr);align-items:end;gap:8px;margin:0 0 32px;padding:0;list-style:none;display:grid}.rung{background:var(--bg-raise);border:1px solid var(--line);border-radius:12px 12px 0 0;flex-direction:column;justify-content:flex-start;gap:8px;min-width:0;padding:16px 14px;display:flex}.rung:first-child{min-height:190px}.rung:nth-child(2){min-height:250px}.rung:nth-child(3){min-height:310px}.rung:nth-child(4){background:color-mix(in srgb, var(--accent) 12%, var(--bg-raise));border-color:color-mix(in srgb, var(--accent) 50%, var(--line));min-height:370px}.rung b{font:600 .9rem/1 var(--f-text);color:var(--accent-text)}.rung h3{font-family:var(--f-display);margin:0;font-size:1.15rem;font-weight:600;line-height:1.2}.rung p{color:var(--ink-soft);margin:0;font-size:.9rem;line-height:1.45}@media (width<=719px){.ladder{grid-template-columns:1fr}.rung,.rung:nth-child(n){border-radius:12px;min-height:0}.rung:nth-child(2){margin-left:12px}.rung:nth-child(3){margin-left:24px}.rung:nth-child(4){margin-left:36px}}.faq{gap:0;max-width:46rem;display:grid}.faq details{border-top:1px solid var(--line);padding:4px 0}.faq details:last-child{border-bottom:1px solid var(--line)}.faq summary{cursor:pointer;min-height:48px;padding:16px 28px 16px 0;font-size:1.125rem;font-weight:600;list-style:none;position:relative}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"+";font:400 1.5rem/1 var(--f-mono);color:var(--accent-text);position:absolute;top:14px;right:0}.faq details[open] summary:after{content:"−"}.faq p{color:var(--ink-soft);max-width:40rem;margin:0 0 18px}.closing{text-align:left}.closing h2{font-family:var(--f-display);letter-spacing:-.02em;text-wrap:balance;max-width:18ch;margin:0 0 24px;font-size:clamp(2rem,5.4vw,4rem);font-weight:560;line-height:1.04}.foot{border-top:1px solid var(--line);background:var(--bg-sunk);padding:56px 0 32px}.foot__grid{gap:32px;display:grid}@media (width>=760px){.foot__grid{grid-template-columns:1.4fr 1fr 1fr 1fr}}.foot__brand{font-family:var(--f-display);margin:0 0 8px;font-size:1.6rem;font-weight:600}.foot__note{color:var(--ink-soft);max-width:22rem;margin:0}.foot__h{font:600 .95rem/1 var(--f-text);color:var(--ink);margin:0 0 14px}.foot ul{gap:2px;margin:0;padding:0;list-style:none;display:grid}.foot li a{color:var(--ink-soft);padding:10px 0;text-decoration:none;display:inline-block}.foot li a:hover{color:var(--ink);text-decoration:underline}.foot__legal{border-top:1px solid var(--line);color:var(--ink-mute);margin-top:40px;padding-top:20px;font-size:.875rem}.foot__legal p{margin:0}.spec{gap:32px;padding-block:32px 96px;display:grid}@media (width>=1000px){.spec{grid-template-columns:17rem minmax(0,1fr);gap:56px}}.spec__toc{font-size:.9rem}@media (width>=1000px){.spec__toc{align-self:start;max-height:calc(100vh - 32px);padding-right:8px;position:sticky;top:16px;overflow:auto}}.spec__toc h2{font:600 .95rem/1 var(--f-text);color:var(--ink);margin:0 0 12px}.spec__toc ol{gap:0;margin:0;padding:0;list-style:none;display:grid}.spec__toc ol ol{border-left:1px solid var(--line);margin:2px 0 6px 2px;padding-left:14px}.spec__toc a{color:var(--ink-soft);padding:5px 0;line-height:1.35;text-decoration:none;display:block}.spec__toc a:hover{color:var(--accent-text)}.spec__toc details>summary{cursor:pointer;color:var(--ink);min-height:44px;padding:8px 0;font-weight:600;list-style:none}@media (width>=1000px){.spec__toc details>summary{display:none}}.spec__intro h1{font-family:var(--f-display);letter-spacing:-.02em;margin:0 0 16px;font-size:clamp(2.1rem,5vw,3.4rem);font-weight:560;line-height:1.05}.schemas{gap:8px;margin:28px 0 40px;padding:0;list-style:none;display:grid}.schemas li{border:1px solid var(--line);background:var(--bg-raise);border-radius:10px;flex-wrap:wrap;align-items:baseline;gap:4px 16px;padding:12px 16px;display:flex}.schemas a{font-family:var(--f-mono);overflow-wrap:anywhere;font-size:.9rem}.schemas span{color:var(--ink-soft);font-size:.9rem}.prose{min-width:0;max-width:46rem}.prose h1:first-child{margin-top:0}.prose h2{font-family:var(--f-display);letter-spacing:-.015em;border-top:1px solid var(--line);margin:3rem 0 1rem;padding-top:1.5rem;scroll-margin-top:16px;font-size:1.9rem;font-weight:600;line-height:1.15}.prose h3{font-family:var(--f-display);margin:2.2rem 0 .8rem;scroll-margin-top:16px;font-size:1.45rem;font-weight:600;line-height:1.2}.prose h4{margin:1.8rem 0 .6rem;scroll-margin-top:16px;font-size:1.1rem}.prose p,.prose ul,.prose ol{margin:0 0 1.1rem}.prose li{margin-bottom:.35rem}.prose pre{margin:0 0 1.4rem}.prose .table-wrap{max-width:100%;margin:0 0 1.6rem;overflow-x:auto}.prose table{border-collapse:collapse;font-size:.95rem}.prose th,.prose td{text-align:left;vertical-align:top;border:1px solid var(--line);padding:10px 14px}.prose th{background:var(--bg-raise);white-space:nowrap;font-weight:600}.prose td{min-width:9rem}.prose .anchor{opacity:0;font-family:var(--f-mono);margin-left:.4em;font-size:.8em;text-decoration:none}.prose :is(h2,h3,h4):hover .anchor,.prose .anchor:focus{opacity:1}.prose blockquote{border-left:3px solid var(--accent);color:var(--ink-soft);margin:0 0 1.2rem;padding-left:16px}.nf{padding:clamp(64px,14vw,160px) 0}.nf h1{font-family:var(--f-display);letter-spacing:-.02em;margin:0 0 20px;font-size:clamp(2.4rem,7vw,5rem);font-weight:560;line-height:1.04}.nf p{color:var(--ink-soft);max-width:36rem;margin:0 0 28px;font-size:1.15rem}.schemas__h{font-family:var(--f-display);margin:28px 0 0;font-size:1.4rem}.spec__toc h2{display:none}@media (width>=1000px){.spec__toc h2{display:block}}.cols.plain .card{border:0;border-top:1px solid var(--line);background:0 0;border-radius:0;padding:18px 0 0}.hero__meta{font:.9rem/1.5 var(--f-text)}.stage__cap{font:.85rem/1.4 var(--f-text)}.stage{max-width:none;margin-inline:calc(var(--gutter) * -1)}.stage__frame{border-inline:0;border-radius:0}@media (width>=1100px){.stage{max-width:80rem;margin-inline:auto}.stage__frame{border:1px solid var(--line);border-bottom:0;border-radius:18px 18px 0 0}}@media (width<=719px){.stage__frame img{object-fit:cover;object-position:50% 52%;height:340px}}.spec__toc details>summary{border:1px solid var(--line);background:var(--bg-raise);border-radius:10px;padding:10px 14px}@media (width>=1100px){.hero{padding-top:24px}.hero__grid{grid-template-columns:minmax(0,27rem) minmax(0,1fr);align-items:center;gap:24px;min-height:640px;display:grid}.hero h1{max-width:none;font-size:clamp(3.2rem,4.6vw,4.2rem)}.hero .stage{perspective:1600px;justify-self:start;width:58rem;max-width:none;margin:0 calc(50% - 50vw) 0 0}.hero .stage__frame{transform-origin:0;border:1px solid var(--line);border-radius:18px;transform:rotateY(-9deg)rotate(-.6deg);box-shadow:0 30px 80px #00000080}.hero .stage:before{inset:10% 0 0 10%}.hero .stage__cap{color:var(--ink-mute);background:0 0;padding:14px 0 0;position:static}.hero .stage__cap a{color:var(--accent-text)}}