/* =========================================================================
   ExoStack website — design system
   Type: Space Grotesk (display) · Inter (text) · JetBrains Mono (code), self-hosted
   Colour: navy ink + teal brand; component colours match the paper's figures
   ========================================================================= */
@font-face{font-family:"Inter";font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/inter-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"Inter";font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/inter-latin-500-normal.woff2) format("woff2")}
@font-face{font-family:"Inter";font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/inter-latin-600-normal.woff2) format("woff2")}
@font-face{font-family:"Inter";font-style:italic;font-weight:400;font-display:swap;src:url(../fonts/inter-latin-400-italic.woff2) format("woff2")}
@font-face{font-family:"Space Grotesk";font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/space-grotesk-latin-500-normal.woff2) format("woff2")}
@font-face{font-family:"Space Grotesk";font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/space-grotesk-latin-700-normal.woff2) format("woff2")}
@font-face{font-family:"JetBrains Mono";font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/jetbrains-mono-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"JetBrains Mono";font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/jetbrains-mono-latin-700-normal.woff2) format("woff2")}

:root{
  --font-text:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --font-display:"Space Grotesk","Inter",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --bg:#ffffff; --bg-soft:#f5f7fa; --bg-elev:#ffffff; --ink:#0b1220; --text:#283447; --muted:#5d6b7e; --line:#e3e8ef;
  --brand:#0e8a7e; --brand-strong:#0a6c63; --brand-soft:#e6f6f4; --brand-2:#4f46e5; --accent:#f59e0b;
  --code-bg:#f6f8fb; --code-ink:#1d2939; --mark:#fde68a; --mark-ink:#7c2d12;
  --c-esa:#0f766e; --c-core:#4338ca; --c-res:#b45309; --c-pase:#15803d; --c-hil:#9d174d;
  --shadow:0 1px 2px rgba(16,24,40,.05),0 8px 24px rgba(16,24,40,.06);
  --shadow-lg:0 2px 4px rgba(16,24,40,.06),0 18px 48px rgba(16,24,40,.12);
  --radius:14px; --header-h:64px; --maxw:1200px;
}
html[data-theme="dark"]{
  --bg:#0a0f1c; --bg-soft:#0e1525; --bg-elev:#111a2c; --ink:#f1f5f9; --text:#cbd5e1; --muted:#8b9ab0; --line:#1e2a40;
  --brand:#2dd4bf; --brand-strong:#5eead4; --brand-soft:#0f2f30; --brand-2:#818cf8; --code-bg:#0f1729; --code-ink:#dbe4f0;
  --mark:#78350f; --mark-ink:#fde68a; --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.35); --shadow-lg:0 18px 48px rgba(0,0,0,.5);
}
*{box-sizing:border-box}
html{scroll-padding-top:calc(var(--header-h) + 16px)}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 var(--font-text);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{max-width:100%;height:auto}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-strong);text-decoration:underline;text-underline-offset:3px}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--ink);line-height:1.2;letter-spacing:-.01em;font-weight:700}
code{font-family:var(--font-mono);font-size:.86em;background:var(--code-bg);border:1px solid var(--line);border-radius:6px;padding:.08em .38em;color:var(--code-ink)}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.ph{color:#dc2626;font-weight:600}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;height:var(--header-h);background:color-mix(in srgb,var(--bg) 82%,transparent);
  backdrop-filter:saturate(1.6) blur(14px);-webkit-backdrop-filter:saturate(1.6) blur(14px);border-bottom:1px solid var(--line)}
.site-header.on-dark{background:rgba(7,13,26,.72);border-bottom-color:rgba(255,255,255,.08)}
.site-header .inner{height:100%;display:flex;align-items:center;gap:28px;max-width:1440px;margin:0 auto;padding:0 24px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:700;font-size:20px;color:var(--ink);letter-spacing:-.02em}
.brand:hover{text-decoration:none;color:var(--ink)}
.brand img{width:30px;height:30px}
.brand .stack{color:var(--brand)}
.on-dark .brand{color:#fff}.on-dark .brand .stack{color:#5eead4}
.nav{display:flex;gap:4px;margin-left:8px}
.nav a{color:var(--muted);font-weight:500;font-size:15px;padding:8px 12px;border-radius:8px}
.nav a:hover{color:var(--ink);background:var(--bg-soft);text-decoration:none}
.nav a.active{color:var(--ink)}
.on-dark .nav a{color:#aab6c8}.on-dark .nav a:hover,.on-dark .nav a.active{color:#fff;background:rgba(255,255,255,.07)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:8px}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:38px;min-width:38px;padding:0 10px;border-radius:10px;
  border:1px solid var(--line);background:var(--bg-elev);color:var(--text);cursor:pointer;font:500 14px var(--font-text)}
.icon-btn:hover{border-color:var(--brand);color:var(--ink);text-decoration:none}
.on-dark .icon-btn{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.14);color:#e2e8f0}
.search-btn{min-width:200px;justify-content:flex-start;color:var(--muted)}
.search-btn kbd{margin-left:auto;font:500 11px var(--font-mono);border:1px solid var(--line);border-radius:5px;padding:1px 6px;color:var(--muted)}
.on-dark .search-btn{color:#aab6c8}.on-dark .search-btn kbd{border-color:rgba(255,255,255,.18);color:#aab6c8}
.menu-btn{display:none}
.icon-btn svg{width:18px;height:18px}
.theme-btn .sun{display:none} html[data-theme="dark"] .theme-btn .sun{display:block} html[data-theme="dark"] .theme-btn .moon{display:none}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;height:46px;padding:0 20px;border-radius:12px;font:600 15px var(--font-text);border:1px solid transparent;cursor:pointer;transition:transform .15s,box-shadow .15s,background .15s}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn svg{width:18px;height:18px}
.btn-primary{background:linear-gradient(135deg,#14b8a6,#0e8a7e);color:#fff;box-shadow:0 8px 24px rgba(20,184,166,.28)}
.btn-primary:hover{color:#fff;box-shadow:0 12px 30px rgba(20,184,166,.38)}
.btn-ghost{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.18);color:#fff}
.btn-ghost:hover{color:#fff;background:rgba(255,255,255,.12)}
.btn-outline{border-color:var(--line);color:var(--ink);background:var(--bg-elev)}
.btn-outline:hover{border-color:var(--brand);color:var(--ink)}

/* ---------- landing: hero ---------- */
.hero{position:relative;overflow:hidden;background:#070d1a;color:#c9d4e3;margin-top:calc(-1 * var(--header-h));padding:calc(var(--header-h) + 72px) 0 88px}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(148,163,184,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(148,163,184,.07) 1px,transparent 1px);background-size:44px 44px;mask-image:radial-gradient(ellipse 80% 70% at 50% 30%,#000 40%,transparent 100%)}
.hero::after{content:"";position:absolute;width:900px;height:900px;left:-200px;top:-420px;background:radial-gradient(circle,rgba(20,184,166,.28),transparent 60%);filter:blur(10px)}
.hero .glow2{position:absolute;width:800px;height:800px;right:-260px;top:-160px;background:radial-gradient(circle,rgba(99,102,241,.24),transparent 62%)}
.hero .container{position:relative;z-index:1;display:grid;grid-template-columns:1.02fr 1fr;gap:56px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font:600 13px var(--font-text);letter-spacing:.08em;text-transform:uppercase;color:var(--brand)}
.hero .eyebrow{color:#5eead4;background:rgba(45,212,191,.1);border:1px solid rgba(45,212,191,.28);border-radius:999px;padding:6px 14px}
.hero h1{color:#fff;font-size:clamp(38px,4.7vw,58px);line-height:1.02;margin:22px 0 18px;letter-spacing:-.03em}
.hero h1 .grad{background:linear-gradient(100deg,#5eead4 0%,#818cf8 70%);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{font-size:19px;line-height:1.6;color:#aebbcd;max-width:560px;margin:0 0 30px}
.hero .ctas{display:flex;flex-wrap:wrap;gap:12px}
.hero .meta{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:30px;font-size:13.5px;color:#8897ac}
.hero .meta span{display:inline-flex;align-items:center;gap:7px}
.hero .meta i{width:7px;height:7px;border-radius:50%;background:#2dd4bf;display:inline-block}
.window{background:#0d1526;border:1px solid rgba(255,255,255,.1);border-radius:16px;box-shadow:0 30px 80px rgba(0,0,0,.55),0 0 0 1px rgba(255,255,255,.03) inset;overflow:hidden}
.window .bar{display:flex;align-items:center;gap:7px;padding:11px 14px;border-bottom:1px solid rgba(255,255,255,.07);background:rgba(255,255,255,.03)}
.window .bar i{width:11px;height:11px;border-radius:50%;background:#334155;display:inline-block}
.window .bar i:nth-child(1){background:#f87171}.window .bar i:nth-child(2){background:#fbbf24}.window .bar i:nth-child(3){background:#34d399}
.window .bar span{margin-left:10px;font:500 12px var(--font-mono);color:#8897ac}
.window img{display:block;width:100%}
.hero-media{position:relative}
.float-chip{position:absolute;background:rgba(13,21,38,.86);border:1px solid rgba(255,255,255,.12);backdrop-filter:blur(8px);border-radius:12px;padding:10px 14px;font:500 13px var(--font-text);color:#dbe4f0;box-shadow:0 12px 30px rgba(0,0,0,.4)}
.float-chip b{display:block;font:700 18px var(--font-display);color:#fff}
.float-chip.a{left:-26px;bottom:44px}.float-chip.b{right:-18px;top:62px}

/* ---------- landing: stats ---------- */
.stats{background:var(--bg);border-bottom:1px solid var(--line)}
.stats .container{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:30px 24px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat b{display:block;font:700 34px/1.1 var(--font-display);color:var(--ink);letter-spacing:-.02em}
.stat span{color:var(--muted);font-size:14.5px}

/* ---------- landing: sections ---------- */
.section{padding:104px 0}
.section.soft{background:var(--bg-soft)}
.section-head{max-width:760px;margin:0 0 52px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head h2{font-size:clamp(30px,3.6vw,44px);margin:14px 0 14px;letter-spacing:-.025em}
.section-head p{font-size:18.5px;color:var(--muted);margin:0}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.card{background:var(--bg-elev);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s,border-color .2s;position:relative}
a.card{display:block;color:inherit}
a.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);text-decoration:none;border-color:color-mix(in srgb,var(--brand) 40%,var(--line))}
.card h3,.card h4.ch{font-size:20px;margin:16px 0 8px}
.doc-cards .card h4.ch{font-size:18px;margin:10px 0 6px}
.card p{margin:0;color:var(--muted);font-size:15.5px}
.card .more{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-weight:600;font-size:14.5px;color:var(--brand)}
.comp{border-top:4px solid var(--c)}
.comp .tag{display:inline-block;font:600 12px var(--font-mono);color:var(--c);background:color-mix(in srgb,var(--c) 10%,transparent);border:1px solid color-mix(in srgb,var(--c) 30%,transparent);border-radius:6px;padding:2px 8px}
.ico{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;background:color-mix(in srgb,var(--c,var(--brand)) 12%,transparent);color:var(--c,var(--brand))}
.ico svg{width:24px;height:24px}

/* pipeline */
.pipeline{display:grid;grid-template-columns:repeat(6,1fr);gap:14px;position:relative;margin-top:8px}
.pipeline::before{content:"";position:absolute;left:6%;right:6%;top:34px;height:2px;background:linear-gradient(90deg,var(--c-esa),var(--c-core),var(--c-pase),var(--c-hil))}
.step{position:relative;text-align:center;padding:0 6px}
.step .dot{width:68px;height:68px;margin:0 auto 14px;border-radius:18px;background:var(--bg-elev);border:1px solid var(--line);box-shadow:var(--shadow);display:grid;place-items:center;color:var(--c);position:relative;z-index:1}
.step .dot svg{width:28px;height:28px}
.step h4{font-size:16.5px;margin:0 0 4px}
.step p{font-size:13.8px;color:var(--muted);margin:0;line-height:1.5}
.step code{font-size:11.5px}

/* figure block */
.figure-card{background:var(--bg-elev);border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:var(--shadow)}
.figure-card img{display:block;border-radius:10px;background:#fff}
.figure-card figcaption,.fig-cap{font-size:14px;color:var(--muted);margin-top:12px;line-height:1.55}

/* split feature rows */
.split{display:grid;grid-template-columns:1fr 1.08fr;gap:64px;align-items:center}
.split + .split{margin-top:110px}
.split.rev{grid-template-columns:1.08fr 1fr}
.split.rev .split-text{order:2}
.split-text h3{font-size:clamp(26px,2.8vw,34px);margin:12px 0 14px;letter-spacing:-.02em}
.split-text p{font-size:17px;color:var(--muted)}
.checks{list-style:none;padding:0;margin:20px 0 26px}
.checks li{position:relative;padding-left:30px;margin:10px 0;font-size:16px}
.checks li::before{content:"";position:absolute;left:0;top:4px;width:20px;height:20px;border-radius:6px;background:var(--brand-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M5 10.5l3 3 7-7' fill='none' stroke='%230e8a7e' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/16px no-repeat}
.btn-row{display:flex;flex-wrap:wrap;gap:10px}
.term{background:#0b1220;border:1px solid #1e293b;border-radius:16px;overflow:hidden;box-shadow:var(--shadow-lg)}
.term .bar{display:flex;align-items:center;gap:7px;padding:11px 14px;background:#0f172a;border-bottom:1px solid #1e293b}
.term .bar i{width:11px;height:11px;border-radius:50%;display:inline-block;background:#334155}
.term .bar span{margin-left:10px;font:500 12.5px var(--font-mono);color:#94a3b8}
.term pre{margin:0;padding:20px 22px;font:13.5px/1.7 var(--font-mono);color:#dbe4f0;overflow-x:auto}
.term .c{color:#64748b}.term .k{color:#f472b6}.term .s{color:#5eead4}.term .n{color:#fbbf24}.term .p{color:#94a3b8}

/* hardware showcase */
.hw{overflow:hidden;padding:0}
.hw img{display:block;width:100%;aspect-ratio:1/1;object-fit:cover;background:#0b1220}
.hw .body{padding:22px 24px 24px}
.hw .pill{display:inline-block;font:600 12px var(--font-text);letter-spacing:.04em;text-transform:uppercase;color:var(--c-hil);background:color-mix(in srgb,var(--c-hil) 10%,transparent);border-radius:999px;padding:3px 10px}

/* quick start band */
.band{background:linear-gradient(135deg,#071224 0%,#0b1d33 55%,#102a3a 100%);color:#c9d4e3;border-radius:24px;padding:56px;display:grid;grid-template-columns:.8fr 1.4fr;gap:48px;align-items:center;position:relative;overflow:hidden}
.band::after{content:"";position:absolute;right:-120px;bottom:-200px;width:520px;height:520px;background:radial-gradient(circle,rgba(45,212,191,.22),transparent 65%)}
.band h2{color:#fff;font-size:36px;margin:12px 0 12px}
.band .term pre{font-size:12.8px}
.band p{color:#9fb0c6}
.band .eyebrow{color:#5eead4}

/* cite + team */
.cite-box{position:relative}
.team{display:flex;flex-wrap:wrap;gap:12px 28px;justify-content:center;margin:18px 0 6px}
.team span{font:600 17px var(--font-display);color:var(--ink)}
.team small{color:var(--muted);font:500 13px var(--font-text)}
.contact-row{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:22px}

/* ---------- footer ---------- */
.site-footer{background:#060b16;color:#94a3b8;padding:64px 0 28px;margin-top:0}
.site-footer .cols{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:32px}
.site-footer h5{font:600 13px var(--font-text);letter-spacing:.08em;text-transform:uppercase;color:#e2e8f0;margin:6px 0 14px}
.site-footer a{color:#94a3b8;display:block;margin:7px 0;font-size:14.5px}
.site-footer a:hover{color:#fff}
.site-footer .brand,.site-footer a.brand{color:#fff;display:flex;font-size:20px;margin:0}
.site-footer .about{font-size:14.5px;line-height:1.6;margin-top:14px;max-width:340px}
.site-footer .legal{border-top:1px solid #172033;margin-top:44px;padding-top:22px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13.5px}

/* ---------- documentation layout ---------- */
.docs{display:grid;grid-template-columns:268px minmax(0,1fr) 232px;max-width:1440px;margin:0 auto;gap:0}
.sidebar{position:sticky;top:var(--header-h);align-self:start;height:calc(100vh - var(--header-h));overflow-y:auto;padding:28px 18px 40px 24px;border-right:1px solid var(--line)}
.sidebar h6{font:600 12px var(--font-text);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:22px 0 8px 10px}
.sidebar h6:first-child{margin-top:0}
.sidebar a{display:block;padding:7px 10px;border-radius:8px;color:var(--text);font-size:14.8px;font-weight:500}
.sidebar a:hover{background:var(--bg-soft);text-decoration:none;color:var(--ink)}
.sidebar a.active{background:var(--brand-soft);color:var(--brand-strong);font-weight:600}
.content{padding:40px 56px 80px;min-width:0}
.article{max-width:820px}
.crumbs{font-size:13.5px;color:var(--muted);margin-bottom:14px}
.crumbs a{color:var(--muted)}
.article h1{font-size:42px;margin:0 0 12px;letter-spacing:-.03em}
.article .page-lead{font-size:18.5px;color:var(--muted);margin:0 0 30px;line-height:1.6}
.article h2{font-size:27px;margin:52px 0 14px;padding-top:6px;letter-spacing:-.02em}
.article h3{font-size:20.5px;margin:34px 0 10px}
.article p{margin:12px 0}
.article ul,.article ol{padding-left:24px}
.article li{margin:6px 0}
.article .anchor{opacity:0;margin-left:8px;font-weight:500;color:var(--muted);text-decoration:none}
.article h2:hover .anchor,.article h3:hover .anchor{opacity:1}
.toc{position:sticky;top:var(--header-h);align-self:start;padding:36px 20px 40px 8px;max-height:calc(100vh - var(--header-h));overflow-y:auto}
.toc h6{font:600 12px var(--font-text);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 10px}
.toc a{display:block;font-size:13.5px;color:var(--muted);padding:4px 0 4px 12px;border-left:2px solid var(--line);line-height:1.4}
.toc a.l3{padding-left:24px;font-size:13px}
.toc a:hover{color:var(--ink);text-decoration:none}
.toc a.active{color:var(--brand-strong);border-left-color:var(--brand);font-weight:600}
.pager{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:64px;padding-top:28px;border-top:1px solid var(--line)}
.pager a{border:1px solid var(--line);border-radius:12px;padding:14px 18px;color:var(--ink);font-weight:600}
.pager a small{display:block;color:var(--muted);font-weight:500;font-size:12.5px;margin-bottom:2px}
.pager a:hover{border-color:var(--brand);text-decoration:none}
.pager .next{text-align:right;grid-column:2}

/* manual components (shared with the PDF user manual) */
.table-wrap{overflow-x:auto;margin:18px 0}
table.t{width:100%;border-collapse:separate;border-spacing:0;font-size:14.5px;border:1px solid var(--line);border-radius:12px;overflow:hidden}
table.t th{background:var(--bg-soft);color:var(--ink);text-align:left;font-weight:600;padding:10px 14px;border-bottom:1px solid var(--line);vertical-align:top}
table.t td{padding:10px 14px;border-bottom:1px solid var(--line);vertical-align:top}
table.t tr:last-child td{border-bottom:0}
table.t code{font-size:.82em}
.cb{margin:20px 0;position:relative}
.codehead{display:inline-block;font:500 12.5px var(--font-mono);color:var(--muted);background:var(--bg-soft);border:1px solid var(--line);border-bottom:0;border-radius:10px 10px 0 0;padding:5px 12px}
pre.code{margin:0;background:var(--code-bg);border:1px solid var(--line);border-radius:0 12px 12px 12px;padding:16px 18px;font:13.6px/1.65 var(--font-mono);color:var(--code-ink);overflow-x:auto;white-space:pre}
.cb:not(:has(.codehead)) pre.code{border-radius:12px}
pre.code .cm{color:#6b7c90;font-style:italic}
html[data-theme="dark"] pre.code .cm{color:#7d8ba1}
pre.code .chg{background:var(--mark);color:var(--mark-ink);border-radius:4px;padding:0 2px;font-weight:700;box-shadow:inset 0 -2px 0 #d97706}
pre.code .chg sup,.mk{display:inline-block;background:#d97706;color:#fff;border-radius:8px;font:700 9.5px var(--font-text);line-height:1;padding:2px 5px;margin-left:2px;vertical-align:super}
pre.code .arrow{color:#c2410c;font-weight:700}
.copy-btn{position:absolute;right:10px;top:10px;height:30px;padding:0 10px;border-radius:8px;border:1px solid var(--line);background:var(--bg-elev);color:var(--muted);font:600 12px var(--font-text);cursor:pointer;opacity:0;transition:opacity .15s}
.cb:hover .copy-btn,.term:hover .copy-btn,.copy-btn:focus{opacity:1}
.cb:has(.codehead) .copy-btn{top:38px}
.copy-btn.done{color:var(--brand);border-color:var(--brand)}
.term .copy-btn{background:#1e293b;border-color:#334155;color:#cbd5e1;top:8px}
table.legend{width:100%;border-collapse:collapse;margin:6px 0 22px;font-size:14.5px}
table.legend td{padding:6px 8px;border-bottom:1px dashed var(--line);vertical-align:top}
table.legend td.k{width:30px;text-align:center}
.box{border-radius:12px;padding:14px 18px 14px 50px;margin:22px 0;position:relative;border:1px solid}
.box .bt{display:block;font:700 12.5px var(--font-text);letter-spacing:.06em;text-transform:uppercase;margin-bottom:4px}
.box::before{content:"";position:absolute;left:16px;top:16px;width:20px;height:20px;background:currentColor;-webkit-mask:var(--i) center/contain no-repeat;mask:var(--i) center/contain no-repeat}
.box ul{margin:4px 0;padding-left:20px}
.box.rule{background:color-mix(in srgb,#dc2626 6%,var(--bg));border-color:color-mix(in srgb,#dc2626 28%,var(--line));color:#b42318;--i:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 2 1 21h22L12 2zm0 6 1 7h-2l1-7zm-1 9h2v2h-2z'/%3E%3C/svg%3E")}
.box.tip{background:color-mix(in srgb,#16a34a 6%,var(--bg));border-color:color-mix(in srgb,#16a34a 28%,var(--line));color:#15803d;--i:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M9 21h6v-1H9v1zm3-19a7 7 0 0 0-4 12.7V17h8v-2.3A7 7 0 0 0 12 2z'/%3E%3C/svg%3E")}
.box.note{background:color-mix(in srgb,#2563eb 6%,var(--bg));border-color:color-mix(in srgb,#2563eb 26%,var(--line));color:#1d4ed8;--i:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 2a10 10 0 1 0 0 20 10 10 0 0 0 0-20zm1 15h-2v-6h2v6zm0-8h-2V7h2v2z'/%3E%3C/svg%3E")}
.box > *:not(.bt){color:var(--text)}
html[data-theme="dark"] .box.rule{color:#fca5a5}html[data-theme="dark"] .box.tip{color:#86efac}html[data-theme="dark"] .box.note{color:#93c5fd}
ol.steps{counter-reset:st;list-style:none;padding-left:0;margin:16px 0}
ol.steps > li{counter-increment:st;position:relative;padding-left:44px;margin:14px 0;min-height:30px}
ol.steps > li::before{content:counter(st);position:absolute;left:0;top:0;width:30px;height:30px;border-radius:50%;background:var(--brand);color:#fff;font:700 14px/30px var(--font-display);text-align:center}
.shot{border:1.5px dashed color-mix(in srgb,var(--muted) 50%,transparent);border-radius:14px;padding:16px 18px;margin:22px 0;background:var(--bg-soft)}
.shot .sid{font:600 13px var(--font-text);color:var(--ink)}
.shot .what{font-size:14px;color:var(--muted);margin-top:4px}
.shot .frame{margin-top:12px;border-radius:10px;display:grid;place-items:center;color:var(--muted);font-size:13px;min-height:90px;
  background:repeating-linear-gradient(45deg,transparent,transparent 10px,color-mix(in srgb,var(--muted) 8%,transparent) 10px,color-mix(in srgb,var(--muted) 8%,transparent) 20px)}
img.fig{display:block;margin:18px auto 6px;border-radius:10px;border:1px solid var(--line);background:#fff}
.cap{font-size:14px;color:var(--muted);margin:6px 0 22px;line-height:1.55}
figure.doc-fig{margin:28px 0}
figure.doc-fig img{display:block;width:100%;border-radius:12px;border:1px solid var(--line);background:#fff}
figure.doc-fig figcaption,figure.tbl figcaption{font-size:14px;color:var(--muted);margin-top:10px;line-height:1.55}
figure.tbl{margin:26px 0}
figure.tbl figcaption{margin:0 0 6px;font-weight:600;color:var(--ink)}
.flow{font:13px/1.6 var(--font-mono);background:var(--code-bg);border:1px solid var(--line);border-radius:12px;padding:14px 18px;white-space:pre;overflow-x:auto}
.kv{font:600 12px var(--font-mono);background:var(--ink);color:var(--bg);padding:1px 7px;border-radius:5px}
.small{font-size:14px;color:var(--muted)}
.doc-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin:24px 0}
.doc-cards .card{padding:20px}
.doc-cards .card h3{margin:10px 0 6px;font-size:18px}
.media-pair{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:22px 0}
.media-pair figure{margin:0}
.media-pair img{width:100%;border-radius:12px;border:1px solid var(--line);aspect-ratio:1/1;object-fit:cover;background:#0b1220}
.media-pair figcaption{font-size:14px;color:var(--muted);margin-top:8px}
.bib{position:relative}

/* ---------- search ---------- */
.search-overlay{position:fixed;inset:0;background:rgba(2,6,23,.55);backdrop-filter:blur(4px);z-index:100;display:none;align-items:flex-start;justify-content:center;padding-top:12vh}
.search-overlay.open{display:flex}
.search-panel{width:min(680px,92vw);background:var(--bg-elev);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow-lg);overflow:hidden}
.search-panel input{width:100%;border:0;border-bottom:1px solid var(--line);padding:18px 20px;font:500 17px var(--font-text);background:transparent;color:var(--ink);outline:none}
.search-results{max-height:56vh;overflow-y:auto;padding:8px}
.search-results a{display:block;padding:10px 12px;border-radius:10px;color:var(--text)}
.search-results a:hover,.search-results a.sel{background:var(--brand-soft);text-decoration:none}
.search-results b{display:block;color:var(--ink);font-weight:600}
.search-results small{color:var(--muted)}
.search-results .empty{padding:18px;color:var(--muted)}

/* ---------- responsive ---------- */
@media (max-width:1240px){.docs{grid-template-columns:250px minmax(0,1fr)}.toc{display:none}}
@media (max-width:1024px){
  .hero .container,.split,.split.rev,.band{grid-template-columns:1fr}
  .split.rev .split-text{order:0}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .pipeline{grid-template-columns:repeat(3,1fr);row-gap:30px}.pipeline::before{display:none}
  .stats .container{grid-template-columns:repeat(2,1fr)}.stat:nth-child(2){border-right:0}
  .site-footer .cols{grid-template-columns:1fr 1fr}
  .float-chip{display:none}
}
@media (max-width:860px){
  .nav{display:none}.search-btn{min-width:38px}.header-actions .lbl,.search-btn kbd{display:none}.menu-btn{display:inline-flex}
  .docs{grid-template-columns:1fr}
  .sidebar{position:fixed;left:0;top:var(--header-h);width:290px;background:var(--bg);z-index:40;transform:translateX(-100%);transition:transform .2s;box-shadow:var(--shadow-lg)}
  body.menu-open .sidebar{transform:none}
  body.menu-open .nav{display:flex;position:fixed;top:var(--header-h);left:0;right:0;flex-direction:column;background:var(--bg);padding:12px;border-bottom:1px solid var(--line);z-index:45}
  body.docs-page.menu-open .nav{display:none}
  .content{padding:28px 20px 60px}
  .grid-3,.grid-2,.doc-cards,.media-pair{grid-template-columns:1fr}
  .section{padding:72px 0}
  .band{padding:32px 24px}
}
@media (max-width:560px){.grid-4,.pipeline,.stats .container{grid-template-columns:1fr}.stat{border-right:0;border-bottom:1px solid var(--line)}.hero h1{font-size:40px}.site-footer .cols{grid-template-columns:1fr}}

/* code: show the characters as typed (no programming ligatures) */
code,pre,kbd{font-variant-ligatures:none;font-feature-settings:"liga" 0,"calt" 0}

/* =========================================================================
   Brand refresh: ExoStack logo + icon set (32-unit grid)
   ========================================================================= */
:root{--c-esa:#176E76;--c-core:#474DA5;--c-res:#99631E;--c-pase:#2B7353;--c-act:#A75F30;--c-hil:#863C68}
/* logo: light/dark variants */
.brand img{width:auto;height:38px}
.brand .logo-d{display:none}
html[data-theme="dark"] .brand .logo-l,.on-dark .brand .logo-l,.site-footer .brand .logo-l{display:none}
html[data-theme="dark"] .brand .logo-d,.on-dark .brand .logo-d,.site-footer .brand .logo-d{display:inline}
/* icons */
.xi{display:block;width:28px;height:28px;color:var(--ic);--icon-knock:var(--bg-elev);flex:none}
html[data-theme="dark"] .xi{color:color-mix(in srgb,var(--ic) 50%,#fff)}
.ico{background:color-mix(in srgb,var(--c,var(--brand)) 11%,var(--bg-elev))}
.ico .xi{width:28px;height:28px;--icon-knock:color-mix(in srgb,var(--c,var(--brand)) 11%,var(--bg-elev))}
/* centred hero with the ExoStack logo */
.hero .container.hero-center{display:flex;flex-direction:column;align-items:center;text-align:center;gap:0}
.hero-logo img{height:clamp(190px,24vw,270px);width:auto;display:block;filter:drop-shadow(0 18px 48px rgba(45,212,191,.16))}
.hero-center .eyebrow{margin-top:26px}
.hero-center h1{font-size:clamp(32px,4.2vw,52px);margin:18px 0 14px;line-height:1.08}
.hero-center .lead{margin:0 auto 30px;max-width:740px}
.hero-center .ctas,.hero-center .meta{justify-content:center}
.hero-center .hero-media{width:min(1000px,100%);margin-top:58px}
.hero-center .float-chip.a{left:-34px;bottom:70px}.hero-center .float-chip.b{right:-34px;top:72px;text-align:left}
/* pipeline icons */
.step .dot .xi{width:30px;height:30px}


/* Supplementary Tables S1, S2 and Fig. S1 (shared sources with the user manual) */
.pt-block{margin:26px 0 22px;overflow-x:auto}
.tcap{font-size:14.5px;color:var(--text);margin:0 0 10px;line-height:1.55}
.tcap b{color:var(--ink)}
table.pt{width:100%;min-width:660px;border-collapse:collapse;table-layout:fixed;font-size:14px;line-height:1.5;border-top:2px solid #0e4f57;border-bottom:2px solid #0e4f57}
table.pt thead th{background:#0e4f57;color:#fff;text-align:left;font-weight:600;padding:10px 12px 8px;border-bottom:3px solid #0e4f57;vertical-align:bottom}
table.pt thead th .pt-code{font-family:var(--font-mono);font-weight:400;color:#b9cdd6;font-size:12px;margin-left:4px}
table.pt tbody th.pt-f{background:var(--bg-soft);text-align:left;font-weight:400;padding:9px 12px;vertical-align:top;border-right:1px solid var(--line);border-top:1px solid var(--line);color:var(--ink)}
table.pt tbody th.pt-f code{background:none;border:0;padding:0;font-weight:700;color:var(--ink)}
table.pt .pt-sub{display:block;color:var(--muted);font-size:12.5px;margin-top:1px}
table.pt td{padding:9px 12px;vertical-align:top;border-top:1px solid var(--line)}
table.pt tbody tr:first-child td,table.pt tbody tr:first-child th{border-top:0}
table.pt td code{font-size:.84em}
table.pt .mut{color:var(--muted)}
table.pt tr.pt-der td{background:var(--bg-soft);color:var(--muted)}
table.pt tr.pt-ex td,table.pt tr.pt-ex th.pt-f{border-top:1.5px solid color-mix(in srgb,var(--muted) 60%,transparent)}
table.pt tr.pt-ex td{background:var(--bg-soft)}
table.pt tr.pt-ex th.pt-f{font-weight:700}
table.pt tr.pt-ex td code{background:none;border:0;padding:0}
.tnote{font-size:13px;color:var(--muted);margin-top:8px;line-height:1.5}
.tnote p{margin:3px 0}
.sfig{margin:26px 0 10px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;overflow-x:auto}
.sfig svg{display:block;width:100%;height:auto;min-width:640px}

/* hero: GUI flanked by the two validation videos (heights matched; widths follow the videos' aspect ratios) */
.hero-stage{--h:clamp(250px,28vw,400px);display:flex;justify-content:center;align-items:flex-start;gap:22px;margin-top:58px;width:100%}
.hero-stage .side{margin:0;flex:none}
.hero-stage video{display:block;background:#0d1526}
.hero-stage .side video{height:var(--h);width:auto;aspect-ratio:378/692;object-fit:cover;border-radius:14px;border:1px solid rgba(255,255,255,.12);box-shadow:0 24px 60px rgba(0,0,0,.5)}
.hero-stage .side figcaption{margin-top:10px;font-size:13px;color:#8897ac;text-align:center}
.hero-stage .window{flex:none;width:calc((var(--h) - 36px) * 1280 / 704)}
.hero-stage .window video{width:100%;height:auto;aspect-ratio:1280/704}
@media (max-width:900px){.hero-stage{flex-wrap:wrap;gap:16px}.hero-stage .window{order:-1;width:100%}.hero-stage .side{width:calc(50% - 8px)}.hero-stage .side video{width:100%;height:auto}}
/* validated-hardware cards with portrait videos */
.card.hw{display:flex;align-items:stretch;padding:0;overflow:hidden}
.card.hw video{flex:none;width:clamp(130px,16vw,190px);height:auto;aspect-ratio:378/692;object-fit:cover;background:#0b1220;display:block}
.card.hw .body{padding:22px 24px;align-self:center}
.media-pair video{display:block;width:100%;max-width:280px;margin:0 auto;aspect-ratio:378/692;border-radius:12px;background:#0b1220}
.media-pair figcaption{text-align:center}
/* PASE screenshots (shared with the user manual) */
.shotfig{margin:24px auto 18px;max-width:100%}
.shotfig img{display:block;width:100%;height:auto;border:1px solid var(--line);border-radius:10px}
table.shotpair{width:100%;border-collapse:separate;border-spacing:10px 0;margin:0 -10px}
table.shotpair td{vertical-align:top;padding:0}
.shotfig .sub{font-size:13px;color:var(--muted);text-align:center;margin-top:6px}
.shotfig .cap{font-size:14px;color:var(--muted);margin-top:10px}
/* contacts */
.team-line{font-size:17px}
.contact-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:14px 0}
.contact-card{border:1px solid var(--line);border-radius:12px;padding:14px 16px;background:var(--bg-elev);display:flex;flex-direction:column;gap:4px}
@media (max-width:700px){.contact-cards{grid-template-columns:1fr}}

/* Table S3 group rows */
table.pt tr.pt-grp th{background:color-mix(in srgb,#0e4f57 14%,var(--bg-elev));color:var(--ink);text-align:left;font-weight:700;padding:7px 12px;border-top:1px solid var(--line)}
table.pt tr.pt-grp + tr td,table.pt tr.pt-grp + tr th{border-top:0}

table.pt tbody th.pt-f code{overflow-wrap:anywhere;word-break:break-word}

/* ROS 2 interfaces section */
a.msgtype{display:inline-flex;flex-direction:column;gap:2px;text-decoration:none}
a.msgtype code{color:var(--brand);border-color:color-mix(in srgb,var(--brand) 35%,var(--line))}
a.msgtype span{font-size:12px;color:var(--muted)}
a.msgtype:hover code{background:var(--brand-soft)}
.if-facts{display:flex;flex-wrap:wrap;gap:8px 22px;margin:14px 0 18px;padding:12px 16px;border:1px solid var(--line);border-radius:12px;background:var(--bg-soft)}
.if-facts div{display:flex;flex-direction:column;gap:2px}
.if-facts span{font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.if-facts b{font-weight:500;color:var(--ink);font-size:14.5px}
table.if-t td code{overflow-wrap:anywhere}
.if-toc{columns:2;column-gap:28px}
.article h4{font-size:16px;margin:22px 0 6px}
@media (max-width:700px){.if-toc{columns:1}}

/* landing: created by */
.hero-center .created-by{margin:0 0 18px;font-size:14px;letter-spacing:.02em;color:#9fb0c6}
.hero-center .created-by b{font-weight:600;color:#dbe4f0}
.hero-center .created-by a{color:#5eead4}

/* image lightbox */
.zoomable{cursor:zoom-in}
.zoomable:focus-visible{outline:3px solid var(--brand);outline-offset:3px}
.lightbox{position:fixed;inset:0;z-index:200;display:none;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:64px 24px 24px;background:rgba(3,7,18,.9);backdrop-filter:blur(3px)}
.lightbox.open{display:flex}
.lb-stage{max-width:96vw;overflow:auto;display:flex;align-items:flex-start}
.lb-stage .lb-media{display:block;margin:auto;flex:none;width:auto;height:auto;background:#fff;border-radius:8px;cursor:zoom-in;box-shadow:0 24px 70px rgba(0,0,0,.6)}
.lb-stage svg.lb-media{max-height:none}
.lb-stage.zoomed .lb-media{margin:0;cursor:zoom-out}
.lb-cap{max-width:min(980px,94vw);color:#cbd5e1;font-size:14px;line-height:1.55;text-align:center}
.lb-cap code{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.15);color:#e2e8f0}
.lb-close{position:fixed;top:14px;right:18px;width:46px;height:46px;border-radius:50%;border:1px solid rgba(255,255,255,.28);background:rgba(15,23,42,.75);color:#fff;font-size:30px;line-height:1;cursor:pointer;display:grid;place-items:center}
.lb-close:hover,.lb-close:focus-visible{background:rgba(30,41,59,.95);outline:2px solid #5eead4}
body.lb-open{overflow:hidden}