@font-face{font-family:'Geist';font-style:normal;font-weight:400 700;font-display:swap;src:url(/assets/fonts/geist-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF}
@font-face{font-family:'Geist';font-style:normal;font-weight:400 700;font-display:swap;src:url(/assets/fonts/geist-latin.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
@font-face{font-family:'Geist Mono';font-style:normal;font-weight:400 500;font-display:swap;src:url(/assets/fonts/geist-mono-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF}
@font-face{font-family:'Geist Mono';font-style:normal;font-weight:400 500;font-display:swap;src:url(/assets/fonts/geist-mono-latin.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
/* ARX Infinity — arx-global.us
   Type: Geist + Geist Mono (SIL OFL 1.1, self-hosted). Colors from ARX hardware: status-LED green, graphite, arm white.
   Signature: one cut corner, taken from the diagonal strokes in the ARX logo. */
:root{
  --paper:#f7f7f4; --white:#ffffff; --ink:#16181b; --ink2:#2b2e33; --mute:#62666d; --line:#e2e2dd; --line2:#d2d2cc;
  --led:#2fcb6b; --led-dk:#27b85f;
  --sans:"Geist",system-ui,-apple-system,"Segoe UI",sans-serif; --mono:"Geist Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --cut:14px; --gut:clamp(16px,3.5vw,40px); --max:1280px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{background:var(--paper);color:var(--ink);font:400 16px/1.55 var(--sans);-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
:focus-visible{outline:2px solid var(--led);outline-offset:2px}
.wrap{max-width:var(--max);margin:0 auto;padding-left:var(--gut);padding-right:var(--gut)}
.mono{font:400 12.5px/1.5 var(--mono);color:var(--mute);letter-spacing:.01em}
.cut{clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,0 100%)}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--led);box-shadow:0 0 0 3px rgba(47,203,107,.18);vertical-align:middle}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:#fff;padding:8px 12px;z-index:100}
.skip:focus{left:8px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;height:46px;padding:0 20px;font:500 15px/1 var(--sans);transition:background .2s,color .2s;white-space:nowrap;cursor:pointer;border:0;--cut:10px;clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,0 100%)}
.btn-ink{background:var(--ink);color:#fff}
.btn-ink:hover{background:#000}
.btn-led{background:var(--led);color:var(--ink)}
.btn-led:hover{background:var(--led-dk)}
.btn-line{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--ink);clip-path:none}
.btn-line:hover{background:var(--ink);color:#fff}
.tlink{font-weight:500;border-bottom:1px solid var(--line2);padding-bottom:2px}
.tlink:hover{border-color:var(--ink)}
.btn-row{display:flex;align-items:center;gap:14px 22px;flex-wrap:wrap}

/* nav */
.nav{position:sticky;top:0;z-index:40;background:rgba(247,247,244,.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:64px;gap:24px}
.logo img{height:19px;width:auto}
.links{display:flex;gap:26px;font-size:15px;color:var(--ink2)}
.links a{position:relative;padding:4px 0}
.links a:hover{color:var(--ink)}
.links a[aria-current="page"]{color:var(--ink);font-weight:500}
.links a[aria-current="page"]::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--led)}
.nav-r{display:flex;align-items:center;gap:10px}
.nav .btn{height:40px;font-size:14px}
.menu-btn{display:none;height:40px;padding:0 14px;background:transparent;border:1px solid var(--line2);font:500 14px var(--sans);color:var(--ink);cursor:pointer}
.mnav{display:none;border-top:1px solid var(--line);background:var(--paper)}
.mnav a{display:block;padding:14px var(--gut);border-bottom:1px solid var(--line);font-size:17px;font-weight:500}
.mnav.open{display:block}

/* home hero */
.hero{padding-top:clamp(40px,6vw,80px);padding-bottom:clamp(40px,5vw,64px)}
.hero h1{font:600 clamp(44px,6.6vw,92px)/.98 var(--sans);letter-spacing:-.04em;max-width:14ch;margin:18px 0 clamp(28px,4vw,48px)}
.hero-grid{display:grid;grid-template-columns:5fr 7fr;gap:clamp(28px,4vw,56px);align-items:start}
.hero-grid>*{min-width:0}
.lead{font-size:clamp(17px,1.4vw,19px);color:var(--ink2);max-width:520px}
.hero .btn-row{margin:28px 0 32px}
.facts{border-top:1px solid var(--line)}
.facts div{display:flex;justify-content:space-between;gap:16px;padding:11px 0;border-bottom:1px solid var(--line);font-size:15px}
.facts span:first-child{font:400 12.5px var(--mono);color:var(--mute);padding-top:2px;white-space:nowrap}
.facts span:last-child{text-align:right}

.buy{background:var(--white);border:1px solid var(--line)}
.buy-img{background:#0b0b0c;aspect-ratio:16/9;overflow:hidden;display:block}
.buy-img img{width:100%;height:100%;object-fit:cover;object-position:45% 60%}
.buy-body{display:grid;grid-template-columns:1.3fr 1fr;gap:24px;padding:22px 24px 24px}
.buy h2{font:600 22px/1.2 var(--sans);letter-spacing:-.015em;margin-bottom:12px}
.buy h2 a:hover{text-decoration:underline;text-underline-offset:3px}
.buy dl{display:grid;grid-template-columns:auto 1fr;gap:6px 16px;font-size:14px}
.buy dt{font:400 12.5px var(--mono);color:var(--mute);padding-top:1px}
.buy .px{border-left:1px solid var(--line);padding-left:24px;display:flex;flex-direction:column;justify-content:space-between;gap:14px}
.price{display:block;font:600 40px/1 var(--sans);letter-spacing:-.03em}

/* release log */
.log{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--white)}
.log-in{display:grid;grid-template-columns:160px 1fr;align-items:stretch}
.log-label{padding:22px 0;border-right:1px solid var(--line);display:flex;flex-direction:column;justify-content:center;gap:4px}
.log-label b{font:600 15px var(--sans)}
.log-track{display:grid;grid-template-columns:repeat(8,minmax(120px,1fr));overflow-x:auto;scrollbar-width:none}
.log-track::-webkit-scrollbar{display:none}
.log-track a{padding:18px 16px 20px;position:relative;display:flex;flex-direction:column;gap:2px}
.log-track a::before{content:"";position:absolute;left:0;right:0;top:30px;height:1px;background:var(--line2)}
.log-track a i{position:relative;width:9px;height:9px;border-radius:50%;background:var(--white);border:1.5px solid var(--ink);margin:8px 0 12px}
.log-track a.new i{background:var(--led);border-color:var(--led)}
.log-track a b{font:600 17px var(--sans);letter-spacing:-.01em}
.log-track a:hover b{text-decoration:underline;text-underline-offset:3px}

section{padding-top:clamp(64px,8vw,104px)}
.sh{display:flex;justify-content:space-between;align-items:flex-end;gap:16px 24px;margin-bottom:26px;flex-wrap:wrap}
.sh h2{font:600 clamp(32px,3.8vw,48px)/1.05 var(--sans);letter-spacing:-.035em}
.sh p{color:var(--mute);max-width:440px;font-size:15px}

/* datasheet */
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chips button{font:400 13px var(--mono);border:1px solid var(--line2);background:transparent;padding:7px 12px;cursor:pointer;color:var(--ink2)}
.chips button.on{background:var(--ink);border-color:var(--ink);color:#fff}
.sheet{border-top:1.5px solid var(--ink)}
.row,.shead{display:grid;grid-template-columns:150px 1.5fr 1fr 2fr 70px 110px;gap:20px;align-items:center}
.row{padding:14px 0;border-bottom:1px solid var(--line);transition:background .2s}
.row:hover{background:var(--white)}
.row.flash{background:rgba(47,203,107,.12)}
.row .th{aspect-ratio:16/10;overflow:hidden;background:#111;--cut:10px;display:block}
.row .th img{width:100%;height:100%;object-fit:cover}
.row h3{font:600 20px/1.15 var(--sans);letter-spacing:-.015em}
.row h3 a:hover{text-decoration:underline;text-underline-offset:3px}
.row p{font-size:14px;color:var(--mute);margin-top:2px}
.row .ty,.row .sp{font:400 13px/1.5 var(--mono);color:var(--ink2)}
.row .yr{font:400 13px var(--mono);color:var(--mute)}
.row .ac{justify-self:end;font-weight:600;font-size:15px;white-space:nowrap}
.row .ac:hover{text-decoration:underline;text-underline-offset:3px}
.row .ac.pr{font-size:17px}
.shead{padding:10px 0;border-bottom:1px solid var(--line)}
.shead span:last-child{text-align:right}

/* setup picker */
.picker{background:var(--white);border:1px solid var(--line);--cut:22px}
.seg{display:grid;grid-template-columns:repeat(3,1fr);border-bottom:1px solid var(--line)}
.seg button{all:unset;cursor:pointer;padding:18px 22px;border-right:1px solid var(--line);display:flex;flex-direction:column;gap:2px}
.seg button:last-child{border-right:0}
.seg button:focus-visible{outline:2px solid var(--led);outline-offset:-2px}
.seg button b{font:600 17px var(--sans);letter-spacing:-.01em}
.seg button.on{background:var(--ink);color:#fff}
.seg button.on .mono{color:#9fa3aa}
.pane{display:grid;grid-template-columns:1.1fr 1fr}
.pane[hidden]{display:none}
.pane .ph{background:#111;min-height:340px;position:relative;overflow:hidden}
.pane .ph img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.pane .tx{padding:clamp(22px,3vw,40px)}
.pane h3{font:600 26px/1.15 var(--sans);letter-spacing:-.02em;margin-bottom:18px}
.pane h4,.lbl{font:400 12.5px var(--mono);color:var(--mute);margin:18px 0 8px}
.ul{list-style:none;display:grid;gap:6px;font-size:15px}
.ul li{padding-left:16px;position:relative}
.ul li::before{content:"";position:absolute;left:0;top:.6em;width:6px;height:6px;background:var(--ink)}
.ul.g li::before{background:var(--led)}
.pane .btn{margin-top:26px}

/* research */
.res{display:grid;grid-template-columns:1fr 1.6fr;gap:clamp(28px,5vw,72px)}
.big{font:600 clamp(80px,10vw,140px)/.9 var(--sans);letter-spacing:-.05em}
.ledger{columns:2;column-gap:32px;border-top:1.5px solid var(--ink)}
.ledger a{display:flex;justify-content:space-between;gap:12px;padding:11px 0;border-bottom:1px solid var(--line);break-inside:avoid;font-size:15px}
.ledger a span:first-child{font-weight:500}
.ledger a:hover span:first-child{text-decoration:underline;text-underline-offset:3px}
.rtable{width:100%;border-collapse:collapse;border-top:1.5px solid var(--ink)}
.rtable th{font:400 12.5px var(--mono);color:var(--mute);text-align:left;padding:10px 12px 10px 0;border-bottom:1px solid var(--line);font-weight:400}
.rtable td{padding:13px 12px 13px 0;border-bottom:1px solid var(--line);vertical-align:baseline}
.rtable td.n{font:600 18px/1.3 var(--sans);letter-spacing:-.01em}
.rtable td.n a:hover{text-decoration:underline;text-underline-offset:3px}
.rtable td.m{font:400 13px var(--mono);color:var(--mute);white-space:nowrap}
.yr-h{font:600 22px var(--sans);letter-spacing:-.02em;margin:40px 0 10px}

/* order */
.order{display:grid;grid-template-columns:1fr 1.3fr;gap:clamp(28px,5vw,64px);background:var(--ink);color:#fff;padding:clamp(24px,4vw,56px);--cut:22px}
.order h2{font:600 clamp(32px,3.6vw,46px)/1.05 var(--sans);letter-spacing:-.035em}
.get{list-style:none;margin-top:26px;border-top:1px solid #2f3237}
.get li{padding:12px 0;border-bottom:1px solid #2f3237;display:grid;grid-template-columns:28px 1fr;font-size:15px;color:#d5d7da}
.get li span{font:400 12.5px var(--mono);color:var(--led);padding-top:2px}
.order .mail{margin-top:24px;font-size:15px;color:#a6a9ae}
.order .mail a{color:#fff;border-bottom:1px solid var(--led)}
.qf{display:grid;grid-template-columns:1fr 1fr;gap:16px 18px;align-content:start}
.qf label{display:grid;gap:6px;font:400 12.5px var(--mono);color:#a6a9ae}
.qf label.full,.qf .full{grid-column:1/-1}
.qf input,.qf select,.qf textarea{font:400 16px var(--sans);color:#fff;background:#202327;border:1px solid #33363b;padding:11px 12px;outline:none;width:100%;border-radius:0}
.qf input:focus,.qf select:focus,.qf textarea:focus{border-color:var(--led)}
.qf select option{color:#000}
.qf textarea{min-height:92px;resize:vertical}
.qf .btn{height:50px}
.qf .hint{font:400 12.5px/1.5 var(--mono);color:#8b8f95}
.resell{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;padding:22px 0;border-bottom:1px solid var(--line);font-size:15px}

/* inner pages */
.phead{padding-top:clamp(36px,5vw,64px)}
.phead::after{content:"";display:block;border-bottom:1px solid var(--line);margin-top:clamp(28px,4vw,48px)}
.crumb{font:400 12.5px var(--mono);color:var(--mute);margin-bottom:18px}
.crumb a:hover{color:var(--ink)}
.phead h1{font:600 clamp(40px,5.4vw,72px)/1 var(--sans);letter-spacing:-.04em;max-width:18ch}
.phead .lead{margin-top:18px;max-width:640px}

.prod{display:grid;grid-template-columns:7fr 5fr;gap:clamp(24px,4vw,56px);align-items:start;padding-top:clamp(28px,4vw,48px)}
.prod>*{min-width:0}
.prod .ph{background:#0b0b0c;aspect-ratio:16/10;overflow:hidden;--cut:22px}
.prod .ph img{width:100%;height:100%;object-fit:cover}
.panel{background:var(--white);border:1px solid var(--line);padding:clamp(20px,2.6vw,32px)}
.panel h1{font:600 clamp(34px,4vw,52px)/1.02 var(--sans);letter-spacing:-.04em;margin:8px 0 14px}
.panel .lead{font-size:17px}
.panel .pxrow{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;margin:22px 0 18px;padding-top:18px;border-top:1px solid var(--line)}
.panel .btn-row{margin-top:6px}

.kv{width:100%;border-collapse:collapse;font-size:15px;border-top:1.5px solid var(--ink)}
.kv th{font:400 12.5px var(--mono);color:var(--mute);text-align:left;font-weight:400;width:38%;padding:13px 16px 13px 0;border-bottom:1px solid var(--line);vertical-align:top}
.kv td{padding:12px 0;border-bottom:1px solid var(--line)}
.split{display:grid;grid-template-columns:1fr 1.4fr;gap:clamp(28px,5vw,72px)}
.split h2{font:600 clamp(28px,3vw,40px)/1.08 var(--sans);letter-spacing:-.03em}
.split .sub{color:var(--mute);margin-top:12px;font-size:15px;max-width:400px}
.steps{list-style:none;display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.steps.s4{grid-template-columns:repeat(4,1fr)}
.steps li{background:var(--white);border:1px solid var(--line);padding:20px;--cut:14px}
.steps li b{display:block;font:500 13px var(--mono);color:var(--led-dk);margin-bottom:10px}
.steps li span{font-size:16px}
.code{display:inline-block;font:400 14px var(--mono);background:var(--ink);color:#e9eaec;padding:10px 14px;margin-top:12px}
.links-list a{display:flex;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px solid var(--line);font-weight:500}
.links-list a:first-child{border-top:1.5px solid var(--ink)}
.links-list a span:last-child{font:400 13px var(--mono);color:var(--mute);font-weight:400}
.links-list a:hover span:first-child{text-decoration:underline;text-underline-offset:3px}

.hwd{display:grid;grid-template-columns:5fr 7fr;gap:clamp(24px,4vw,56px);padding:clamp(36px,5vw,56px) 0;border-bottom:1px solid var(--line);scroll-margin-top:80px;align-items:start}
.hwd>*{min-width:0}
.hwd .ph{background:#111;aspect-ratio:16/10;overflow:hidden}
.hwd .ph img{width:100%;height:100%;object-fit:cover}
.hwd h2{font:600 clamp(28px,3vw,40px)/1.05 var(--sans);letter-spacing:-.03em;margin:6px 0 10px}
.hwd p.d{color:var(--ink2);max-width:560px;margin-bottom:18px}
.hwd .kv{margin-bottom:20px}
.hwd:target{background:linear-gradient(90deg,rgba(47,203,107,.08),transparent 60%)}

.prose{max-width:720px}
.prose h2{font:600 24px/1.2 var(--sans);letter-spacing:-.02em;margin:36px 0 10px}
.prose p,.prose li{color:var(--ink2);margin-bottom:12px}
.prose ul{padding-left:20px}
.prose a{border-bottom:1px solid var(--line2)}
.prose a:hover{border-color:var(--ink)}

.band{background:var(--white);border:1px solid var(--line);padding:clamp(24px,3.5vw,44px);display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;--cut:22px}
.band h2{font:600 clamp(26px,3vw,38px)/1.1 var(--sans);letter-spacing:-.03em}
.band p{color:var(--mute);margin-top:6px}

footer{margin-top:clamp(64px,8vw,104px);border-top:1px solid var(--line);padding:44px 0 32px;font-size:14px;color:var(--mute)}
.f-grid{display:grid;grid-template-columns:2fr repeat(4,1fr);gap:28px}
.f-grid h4{font:400 12.5px var(--mono);color:var(--ink);margin-bottom:10px;font-weight:400}
.f-grid a{display:block;margin-bottom:6px}
.f-grid a:hover{color:var(--ink)}
.f-base{margin-top:36px;padding-top:18px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font:400 12.5px var(--mono)}
.f-base a:hover{color:var(--ink)}

@media (max-width:1020px){
  .links,.nav .btn{display:none}
  .menu-btn{display:inline-flex;align-items:center}
  .hero-grid,.pane,.res,.order,.prod,.split,.hwd{grid-template-columns:1fr}
  .row,.shead{grid-template-columns:110px 1fr auto;gap:6px 14px}
  .row .th{grid-row:span 3}
  .row .ty,.row .yr{display:none}
  .row .sp{grid-column:2/4}
  .row .ac{grid-column:2/4;justify-self:start}
  .shead{display:none}
  .ledger{columns:1}
  .steps{grid-template-columns:1fr}
  .f-grid{grid-template-columns:1fr 1fr}
  .log-in{grid-template-columns:1fr}
  .log-label{border-right:0;border-bottom:1px solid var(--line);padding:14px 0}
  .log-track{-webkit-mask-image:linear-gradient(90deg,#000 80%,transparent);mask-image:linear-gradient(90deg,#000 80%,transparent)}
}
@media (max-width:600px){
  .buy-body{grid-template-columns:1fr}
  .buy .px{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:16px}
  .seg{grid-template-columns:1fr}
  .seg button{border-right:0;border-bottom:1px solid var(--line)}
  .pane .ph{min-height:220px}
  .qf{grid-template-columns:1fr}
  .row{grid-template-columns:96px 1fr}
  .rtable .hide-s{display:none}
  .kv th{width:42%}
}

/* ---------- multi-page additions ---------- */
.narrow{max-width:820px}
.mute{color:var(--mute)}
.upd{margin-top:14px}
.toc{margin-top:18px;font-size:15px;display:flex;flex-wrap:wrap;gap:8px 4px;color:var(--mute)}
.more{margin-top:18px;background:none;border:0;border-bottom:1px solid var(--line2);font:500 15px var(--sans);cursor:pointer;color:var(--ink)}
.big-ul{font-size:16px;gap:10px}
.big-p{font:400 clamp(18px,1.6vw,21px)/1.5 var(--sans);color:var(--ink2);max-width:640px}

/* cards */
.cards{display:grid;gap:20px}
.cards.c2{grid-template-columns:repeat(2,1fr)}
.cards.c3{grid-template-columns:repeat(3,1fr)}
.cards.c5{grid-template-columns:repeat(5,1fr)}
.card{display:flex;flex-direction:column;background:var(--white);border:1px solid var(--line);transition:border-color .2s;min-width:0}
.card:hover{border-color:var(--ink)}
.card .ph{aspect-ratio:16/10;overflow:hidden;background:#111}
.card .ph img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.card:hover .ph img{transform:scale(1.03)}
.card .tx{padding:16px 18px 18px;display:flex;flex-direction:column;gap:6px;flex:1}
.card h3{font:600 19px/1.25 var(--sans);letter-spacing:-.015em}
.card p{font-size:14.5px;color:var(--mute);flex:1}
.card .go{font-weight:600;font-size:14.5px;margin-top:6px}
.cards.c5 .card h3{font-size:17px}

/* key facts */
.keyfacts{display:grid;grid-template-columns:repeat(2,1fr);border-top:1.5px solid var(--ink)}
.keyfacts div{padding:14px 16px 14px 0;border-bottom:1px solid var(--line)}
.keyfacts div:nth-child(even){padding-left:16px;border-left:1px solid var(--line)}
.keyfacts dt{font:400 12.5px var(--mono);color:var(--mute);margin-bottom:4px}
.keyfacts dd{font:600 18px/1.3 var(--sans);letter-spacing:-.01em}

/* faq */
.faq{border-top:1.5px solid var(--ink)}
.qa{border-bottom:1px solid var(--line)}
.qa summary{list-style:none;cursor:pointer;padding:16px 36px 16px 0;position:relative}
.qa summary::-webkit-details-marker{display:none}
.qa summary h3{font:600 17px/1.35 var(--sans);letter-spacing:-.01em}
.qa summary::after{content:"+";position:absolute;right:4px;top:12px;font:400 22px var(--mono);color:var(--mute)}
.qa[open] summary::after{content:"–"}
.qa-a{padding:0 0 18px;color:var(--ink2);max-width:680px}
.qa-a p{font-size:15.5px}

/* sources */
.srcs{list-style:none;border-top:1.5px solid var(--ink)}
.srcs li{padding:11px 0;border-bottom:1px solid var(--line);font-size:15px}
.srcs a{border-bottom:1px solid var(--line2)}
.srcs a:hover{border-color:var(--ink)}

/* tables */
.tw{overflow-x:auto;-webkit-overflow-scrolling:touch}
.rtable td .n,.rtable td.n a{font-weight:600}
.rtable td .s{font-size:14.5px;color:var(--ink2);margin-top:2px}
.rtable td .m,.rtable td.m{font:400 12.5px var(--mono);color:var(--mute)}
.rtable td.ev{font-size:14px;max-width:240px}
.rtable a.n:hover{text-decoration:underline;text-underline-offset:3px}
.cmp td{font-size:15px}
.cmp td.n a{font:600 17px var(--sans)}

/* solution pages */
.sol-hero{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,56px);align-items:center}
.sol-hero>*{min-width:0}
.sol-hero .ph{background:#111;aspect-ratio:16/10;overflow:hidden;--cut:22px}
.sol-hero .ph img{width:100%;height:100%;object-fit:cover}
.setups{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.setup{display:grid;grid-template-columns:120px 1fr;gap:14px;align-items:center;background:var(--white);border:1px solid var(--line);padding:12px;--cut:14px}
.setup:hover{border-color:var(--ink)}
.setup .ph{aspect-ratio:16/10;overflow:hidden;background:#111}
.setup .ph img{width:100%;height:100%;object-fit:cover}
.setup b{font:600 17px var(--sans)}
.setup p{font-size:14px;color:var(--mute);margin-top:2px}

/* articles */
.art{max-width:820px;padding-top:clamp(28px,4vw,48px)}
.art h1{font:600 clamp(32px,4.2vw,52px)/1.05 var(--sans);letter-spacing:-.035em;margin:14px 0 14px}
.art .meta{margin-bottom:24px}
.art-img{aspect-ratio:16/8;overflow:hidden;background:#111;margin-bottom:32px;--cut:22px}
.art-img img{width:100%;height:100%;object-fit:cover}
.art .prose{max-width:none}
.prose p.answer{background:var(--white);border:1px solid var(--line);border-left:3px solid var(--led);padding:16px 18px;color:var(--ink);font-size:16.5px}
.prose h3{font:600 19px/1.3 var(--sans);margin:24px 0 8px}
.prose ol,.prose ul{padding-left:22px;margin-bottom:14px}
.prose li{margin-bottom:6px}
.prose table{width:100%;border-collapse:collapse;margin:8px 0 22px;font-size:14.5px;border-top:1.5px solid var(--ink)}
.prose th{font:400 12.5px var(--mono);color:var(--mute);text-align:left;padding:10px 12px 10px 0;border-bottom:1px solid var(--line);font-weight:400;vertical-align:bottom}
.prose td{padding:10px 12px 10px 0;border-bottom:1px solid var(--line);vertical-align:top}
.prose code{font:400 13.5px var(--mono);background:#ecebe6;padding:1px 5px;overflow-wrap:anywhere}
.prose p,.prose li,.prose td{overflow-wrap:break-word}
.prose pre{background:var(--ink);color:#e9eaec;padding:16px 18px;overflow-x:auto;margin:6px 0 20px}
.prose pre code{background:none;padding:0;color:inherit;font-size:13.5px;line-height:1.6}
.prose strong{font-weight:600}

/* glossary */
.gloss{border-top:1.5px solid var(--ink)}
.term{display:grid;grid-template-columns:240px 1fr;gap:20px;padding:16px 0;border-bottom:1px solid var(--line);scroll-margin-top:80px}
.term:target{background:rgba(47,203,107,.08)}
.term dt{font:600 17px var(--sans)}
.term dd{color:var(--ink2);font-size:15.5px}

@media (max-width:1180px){
  .links{display:none}
  .nav .btn{display:none}
  .menu-btn{display:inline-flex;align-items:center}
  .cards.c5{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:1020px){
  .cards.c3,.cards.c5,.setups{grid-template-columns:1fr 1fr}
  .sol-hero{grid-template-columns:1fr}
  .steps.s4{grid-template-columns:1fr 1fr}
  .term{grid-template-columns:1fr;gap:4px}
}
@media (max-width:600px){
  .cards.c2,.cards.c3,.cards.c5,.setups,.steps.s4{grid-template-columns:1fr}
  .keyfacts{grid-template-columns:1fr}
  .keyfacts div:nth-child(even){padding-left:0;border-left:0}
  .setup{grid-template-columns:96px 1fr}
}

@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* ===== Theme: arx-x.com colours (dark). Colours only — layout, type and shapes unchanged. ===== */
:root{
  --paper:#000000; --white:#0f0f11; --ink:#f5f5f7; --ink2:#c7c7cc; --mute:#98989d;
  --line:rgba(255,255,255,.11); --line2:rgba(255,255,255,.22);
  --led:#2997ff; --led-dk:#2997ff;
}
::selection{background:rgba(41,151,255,.3)}
.dot{box-shadow:0 0 0 3px rgba(41,151,255,.25)}
.skip{color:#000}
.btn-ink{color:#000}
.btn-ink:hover{background:#fff}
.btn-led{background:#0071e3;color:#fff}
.btn-led:hover{background:#0077ed}
.btn-line:hover{color:#000}
.nav{background:rgba(0,0,0,.72)}
.chips button.on{color:#000}
.row.flash{background:rgba(41,151,255,.14)}
.seg button.on{color:#000}
.seg button.on .mono{color:#6a6a70}
.order{background:#111113;color:#f5f5f7;box-shadow:inset 0 0 0 1px var(--line)}
.qf input,.qf select,.qf textarea{background:#1c1c1e;border-color:#2c2c2e}
.code{background:#1c1c1e;color:#e9eaec}
.prose pre{background:#1c1c1e;color:#e9eaec}
.prose code{background:rgba(255,255,255,.1)}
.hwd:target{background:linear-gradient(90deg,rgba(41,151,255,.1),transparent 60%)}
.term:target{background:rgba(41,151,255,.1)}