:root{--ink:#3f444a;--text2:#555b62;--coal:#5b6168;--slate:#646a71;--iron:#8a9097;--ash:#b4b9be;--fog:#e6e8eb;--mist:#eceef0;--paper:#f5f6f7;--chalk:#ffffff;--line:#d5d9dd;--steel:#b9c7d4;--sage:#c3d3c6;--sand:#e2d6bf;--plum:#cdbfce;--r:10px;--w:1180px;--pad:88px;--mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;--sans:"Archivo",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
body{margin:0;font-family:var(--sans);font-size:17px;line-height:1.7;color:var(--ink);background:var(--chalk);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
:focus-visible{outline:2px solid var(--steel);outline-offset:3px;border-radius:4px}
.wrap{max-width:var(--w);margin:0 auto;padding:0 24px}
h1,h2,h3{font-weight:700;line-height:1.15;letter-spacing:-.015em;margin:0 0 .5em}
h1{font-size:clamp(2.5rem,6vw,4.4rem);font-stretch:112%;letter-spacing:-.03em}
h2{font-size:clamp(1.7rem,3.4vw,2.5rem);font-stretch:108%}
h3{font-size:1.2rem}
p{margin:0 0 1em}
code,pre{font-family:var(--mono);font-size:.88em}
:not(pre)>code{background:var(--mist);padding:.1em .35em;border-radius:4px}
pre{background:var(--slate);color:var(--chalk);padding:18px 20px;border-radius:var(--r);overflow-x:auto;line-height:1.55;margin:0 0 1.2em}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;z-index:99;background:var(--chalk);padding:8px 12px}

/* header = editor tab bar */
.hdr{position:sticky;top:0;z-index:50;background:var(--coal);color:var(--chalk);border-bottom:1px solid var(--iron)}
.hdr .wrap{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700;font-stretch:110%;font-size:1.12rem;white-space:nowrap}
.brand svg{width:30px;height:30px;flex:none}
.nav{margin-left:auto;display:flex;align-items:center;gap:2px}
.nav a{text-decoration:none;font-size:.9rem;color:var(--fog);padding:8px 10px;border-radius:6px}
.nav a:hover{color:var(--chalk);background:var(--slate)}
.nav .dl{background:var(--chalk);color:var(--coal);font-weight:600;margin-left:8px}
.nav .dl:hover{background:var(--mist);color:var(--ink)}
.menu-btn{display:none;margin-left:auto;background:none;border:1px solid var(--iron);color:var(--paper);border-radius:6px;padding:6px 10px;font:inherit;cursor:pointer}
@media (max-width:1060px){.menu-btn{display:block}.nav{display:none;position:absolute;top:64px;left:0;right:0;background:var(--coal);flex-direction:column;align-items:stretch;padding:10px 16px 18px;border-bottom:1px solid var(--iron)}.nav.open{display:flex}.nav .dl{margin:8px 0 0;text-align:center}}

/* hero split pane */
.hero{display:grid;grid-template-columns:1fr 1fr;min-height:560px}
.hero .left{background:var(--slate);color:var(--chalk);padding:var(--pad) 56px var(--pad) max(24px,calc((100vw - var(--w))/2 + 24px));position:relative}
.hero .left::before{content:"";position:absolute;inset:0 auto 0 0;width:max(14px,calc((100vw - var(--w))/2 - 8px));background:repeating-linear-gradient(rgba(255,255,255,.08) 0 1px,transparent 1px 27px)}
.hero .left>*{position:relative}
.hero .gutter{font-family:var(--mono);font-size:.85rem;color:var(--fog);margin-bottom:22px}
.hero h1{color:var(--chalk)}
.hero .lead{font-size:1.12rem;color:var(--fog)}
.hero .right{background:var(--mist);display:flex;align-items:center;justify-content:center;padding:var(--pad) max(24px,calc((100vw - var(--w))/2 + 24px)) var(--pad) 56px}
.hero .right img{border-radius:14px;box-shadow:0 24px 50px -28px rgba(63,68,74,.45)}
.btns{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.btn{display:inline-flex;align-items:center;gap:10px;padding:13px 22px;border-radius:8px;font-weight:600;text-decoration:none;border:1px solid transparent;cursor:pointer;font:inherit;font-weight:600}
.btn svg{width:18px;height:18px}
.btn-light{background:var(--chalk);color:var(--coal);border-color:var(--chalk)}.btn-light:hover{background:var(--mist)}
.btn-ghost{border-color:var(--ash);color:var(--chalk)}.btn-ghost:hover{background:var(--coal)}
.btn-dark{background:var(--coal);color:var(--chalk)}.btn-dark:hover{background:var(--slate)}
@media (max-width:900px){.hero{grid-template-columns:1fr}.hero .left,.hero .right{padding:var(--pad) 24px}.hero .left::before{display:none}}

/* sections */
.sec{padding:var(--pad) 0}
.sec.dark{background:var(--slate);color:var(--chalk)}
.sec.deep{background:var(--coal);color:var(--chalk)}
.sec.light{background:var(--chalk)}
.sec.pale{background:var(--mist)}
.sec-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.25fr);gap:48px;align-items:end;margin-bottom:44px}
.sec-head p{margin:0;color:inherit;opacity:.88}
.sec p{max-width:none}
@media (max-width:820px){:root{--pad:64px}.sec-head{grid-template-columns:1fr;gap:12px}}
.prose{max-width:none}
.cols2{display:grid;grid-template-columns:1fr 1fr;gap:40px}
@media (max-width:820px){.cols2{grid-template-columns:1fr}}

/* download */
.download{background:var(--coal);color:var(--chalk)}
.dl-row{display:grid;grid-template-columns:auto 1fr auto;gap:36px;align-items:center}
.dl-file{font-family:var(--mono);font-size:.95rem;color:var(--fog)}
.dl-meta{display:flex;flex-wrap:wrap;gap:8px 26px;color:var(--fog);font-size:.92rem}
.dl-meta b{color:var(--chalk);font-weight:600}
.pkg{width:64px;height:64px}
@media (max-width:820px){.dl-row{grid-template-columns:1fr;gap:18px}}

/* features: ruled list, not cards */
.feat{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--iron)}
.feat div{padding:26px 26px 26px 0;border-bottom:1px solid var(--iron)}
.feat div:not(:nth-child(3n+1)){padding-left:26px;border-left:1px solid var(--iron)}
.feat p{color:var(--fog);margin:0;font-size:.97rem}
.feat .k{font-family:var(--mono);font-size:.8rem;color:var(--sand);display:block;margin-bottom:10px}
@media (max-width:900px){.feat{grid-template-columns:1fr}.feat div,.feat div:not(:nth-child(3n+1)){padding:22px 0;border-left:0}}

/* workflow steps */
.steps{list-style:none;padding:0;margin:0;counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.steps li{counter-increment:s;padding:0 24px 0 0;position:relative}
.steps li::before{content:counter(s);display:grid;place-items:center;width:44px;height:44px;border-radius:50%;background:var(--slate);color:var(--chalk);font-weight:700;margin-bottom:18px;position:relative;z-index:1}
.steps li::after{content:"";position:absolute;top:22px;left:44px;right:0;height:1px;background:var(--ash)}
.steps li:last-child::after{display:none}
.steps p{font-size:.97rem;color:var(--text2);margin:0 0 .6em}
@media (max-width:820px){.steps{grid-template-columns:1fr;gap:28px}.steps li::after{display:none}}

/* tables */
.tbl{overflow-x:auto;border-radius:var(--r)}
table{width:100%;border-collapse:collapse;font-size:.96rem;min-width:620px}
th,td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--line);vertical-align:top}
thead th{background:var(--slate);color:var(--chalk);font-weight:600}
tbody tr:nth-child(even){background:var(--paper)}
.dark table td,.deep table td{border-color:var(--iron)}
.dark thead th{background:var(--chalk);color:var(--coal)}
.dark tbody tr:nth-child(even){background:rgba(255,255,255,.08)}
.chip{display:inline-block;font-family:var(--mono);font-size:.78rem;padding:2px 8px;border-radius:4px;background:var(--mist);color:var(--ink);border:1px solid var(--line)}
.chip.ok{background:var(--sage);color:var(--ink)}

/* use cases */
.uses{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.uses div{background:var(--chalk);padding:28px}
.uses p{margin:0 0 .6em;color:var(--text2)}.uses p:last-child{margin:0}
@media (max-width:720px){.uses{grid-template-columns:1fr}}

/* guide cards */
.posts{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.post{background:var(--chalk);color:var(--ink);border-radius:12px;overflow:hidden;display:flex;flex-direction:column;border:1px solid var(--line)}
.post img{aspect-ratio:1200/630;object-fit:cover;width:100%}
.post .body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1}
.post h3 a{text-decoration:none}.post h3 a:hover{text-decoration:underline}
.post p{color:var(--text2);font-size:.95rem;flex:1}
.post .more{font-weight:600;color:var(--coal);text-decoration:none;border-bottom:1px solid var(--iron);align-self:flex-start;padding-bottom:2px}
.post .more:hover{border-color:var(--coal)}
.post .meta{font-size:.82rem;color:var(--iron);margin-bottom:8px}
@media (max-width:960px){.posts{grid-template-columns:1fr 1fr}}@media (max-width:640px){.posts{grid-template-columns:1fr}}
.center{text-align:center;margin-top:44px}

/* setup */
.setup{display:grid;grid-template-columns:repeat(2,1fr);gap:28px 40px}
.setup h3{display:flex;gap:10px;align-items:center}
@media (max-width:820px){.setup{grid-template-columns:1fr}}

/* faq */
.faq{max-width:none}
.faq details{border-bottom:1px solid var(--ash)}
.faq details:first-child{border-top:1px solid var(--ash)}
.faq summary{list-style:none;cursor:pointer;padding:20px 44px 20px 0;font-weight:600;font-size:1.07rem;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:8px;top:50%;width:12px;height:12px;border-right:2px solid var(--iron);border-bottom:2px solid var(--iron);transform:translateY(-70%) rotate(45deg);transition:transform .2s}
.faq details[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.faq .a{padding:0 0 20px;color:var(--text2)}
.faq .a p:last-child{margin:0}

/* page header for inner pages */
.phead{background:var(--slate);color:var(--chalk);padding:var(--pad) 0}
.phead h1{font-size:clamp(2rem,4.6vw,3.2rem);color:var(--chalk)}
.phead p{color:var(--fog);margin:0 0 .6em}
.crumbs{font-size:.88rem;color:var(--fog);margin-bottom:18px}
.crumbs a{color:var(--fog)}
.article{padding:var(--pad) 0}
.article .wrap{max-width:var(--w)}
.article figure{margin:0 0 36px}
.article h2{font-size:1.6rem;margin-top:1.6em}
.article ul,.article ol{padding-left:1.3em}
.article li{margin-bottom:.4em}
.note{background:var(--mist);border-left:4px solid var(--slate);padding:16px 20px;border-radius:0 8px 8px 0;margin:0 0 1.2em}
.next{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:48px}
.next a{display:block;padding:18px 20px;border:1px solid var(--line);border-radius:10px;text-decoration:none;background:var(--paper)}
.next a:hover{border-color:var(--iron)}
.next small{display:block;color:var(--iron)}
@media (max-width:640px){.next{grid-template-columns:1fr}}
.legal{padding:var(--pad) 0}.legal .wrap{max-width:var(--w)}.legal h2{font-size:1.4rem;margin-top:1.6em}

/* footer */
.ftr{background:var(--coal);color:var(--fog);padding:var(--pad) 0 0;font-size:.95rem}
.ftr-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.ftr .brand{color:var(--chalk);margin-bottom:14px}
.ftr h4{color:var(--chalk);font-size:1rem;margin:4px 0 14px}
.ftr ul{list-style:none;margin:0;padding:0}
.ftr li{margin-bottom:9px}
.ftr a{text-decoration:none}.ftr a:hover{color:var(--chalk);text-decoration:underline}
.ftr-bot{border-top:1px solid var(--iron);margin-top:48px;padding:22px 0;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:.86rem;color:var(--fog)}
@media (max-width:860px){.ftr-grid{grid-template-columns:1fr 1fr}}@media (max-width:520px){.ftr-grid{grid-template-columns:1fr}}

/* scroll to top */
.totop{position:fixed;right:22px;bottom:22px;width:50px;height:50px;border-radius:50%;border:1px solid var(--iron);background:var(--slate);color:var(--chalk);display:grid;place-items:center;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .25s,transform .25s,visibility .25s;z-index:60;box-shadow:0 10px 24px -10px rgba(63,68,74,.5)}
.totop.show{opacity:1;visibility:visible;transform:none}
.totop:hover{background:var(--coal)}
.totop svg{width:22px;height:22px}

.dark :not(pre)>code,.deep :not(pre)>code,.phead :not(pre)>code{background:rgba(255,255,255,.15)}
.article p,.legal p,.article li{color:var(--ink)}
.prose-split p{margin-bottom:.8em}
.smap{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:8px 48px}
.smap h2{margin-top:0;font-size:1.25rem;padding-bottom:10px;border-bottom:1px solid var(--line)}
.smap ul{list-style:none;padding:0;margin:0 0 32px}.smap li{margin-bottom:10px}
.smap a{text-decoration:none;color:var(--ink)}.smap a:hover{text-decoration:underline}

/* ===== responsive: tablet & mobile ===== */
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{overflow-x:hidden}
.nav{max-height:calc(100vh - 64px);overflow-y:auto}
@media (max-width:1060px){.nav a{padding:12px 10px;font-size:1rem}}
@media (min-width:601px) and (max-width:900px){
 .feat{grid-template-columns:repeat(2,1fr)}
 .feat div,.feat div:not(:nth-child(3n+1)){padding:24px 22px 24px 0;border-left:0}
 .feat div:nth-child(2n){padding-left:22px;border-left:1px solid var(--iron)}
 .steps{grid-template-columns:repeat(2,1fr);gap:32px 24px}
 .uses{grid-template-columns:repeat(2,1fr)}
 .hero .right img{max-width:640px;margin:0 auto}
}
@media (max-width:600px){
 body{font-size:16px}
 .wrap{padding:0 18px}
 :root{--pad:56px}
 .hdr .wrap{height:58px}
 .nav{top:58px}
 .brand{font-size:1.02rem}.brand svg{width:28px;height:28px}
 .hero .left,.hero .right{padding:var(--pad) 18px}
 .hero h1{font-size:2.6rem}
 .btns .btn{flex:1 1 100%;justify-content:center}
 .dl-row .btn{width:100%;justify-content:center}
 .pkg{width:52px;height:52px}
 .sec-head{margin-bottom:30px}
 .steps li{padding-right:0}
 .uses div{padding:22px}
 pre{font-size:.8rem;padding:14px 16px}
 .posts{gap:20px}
 .faq summary{font-size:1rem;padding:18px 36px 18px 0}
 .next{grid-template-columns:1fr}
 .totop{right:14px;bottom:14px;width:46px;height:46px}
 .ftr-bot{flex-direction:column;gap:6px}
 /* tables become stacked cards */
 .tbl{overflow:visible}
 .tbl table{min-width:0}
 .tbl thead{display:none}
 .tbl tr{display:block;border:1px solid var(--line);border-radius:10px;margin-bottom:14px;overflow:hidden;background:var(--chalk)}
 .dark .tbl tr{border-color:var(--iron);background:rgba(255,255,255,.06)}
 .tbl td{display:grid;grid-template-columns:118px 1fr;gap:10px;padding:10px 14px}
 .tbl td::before{content:attr(data-label);font-weight:600;opacity:.75}
 .tbl tbody tr:nth-child(even){background:var(--chalk)}
 .dark .tbl tbody tr:nth-child(even){background:rgba(255,255,255,.06)}
 .tbl tr td:last-child{border-bottom:0}
}
@media (max-width:380px){.hero h1{font-size:2.25rem}.tbl td{grid-template-columns:1fr;gap:2px}}
@media (hover:none){.nav a:hover{background:none}}
.setup>*,.cols2>*,.posts>*,.feat>*,.steps>*,.uses>*,.sec-head>*,.ftr-grid>*,.dl-row>*,.hero>*{min-width:0}
@media (max-width:820px){.setup{grid-template-columns:minmax(0,1fr)}}
@media (min-width:601px) and (max-width:960px){
 .posts{grid-template-columns:minmax(0,1fr)}
 .post{flex-direction:row}
 .post>a{flex:0 0 44%;display:block}
 .post img{height:100%;object-fit:cover}
 .post .body{padding:24px 26px}
}