/* self-hosted fonts (Latin subsets from Google Fonts; Outfit is a variable font covering 400–700) */
@font-face{font-family:'Outfit';font-style:normal;font-weight:400 700;font-display:swap;src:url(fonts/outfit.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:'IBM Plex Mono';font-style:normal;font-weight:400;font-display:swap;src:url(fonts/ibm-plex-mono-400.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:'IBM Plex Mono';font-style:normal;font-weight:500;font-display:swap;src:url(fonts/ibm-plex-mono-500.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}
/* Backbrain hero — styles. Tokens on :root; single committed dark look. */
/* Layout: one viewport-high hero on a visible grid (1px rules). Header strip; animation cell = 2 of 3 columns; right column = stats / navigator / live detail cells; settings in a drawer at the bottom edge. Single dark look. */
:root{
  --bg:#070B09;
  --bg-cell:#090F0C;
  --bg-glow:#0C1A12;
  --rule:rgba(143,167,154,.22);
  --fg:#E6F3EB;
  --fg-dim:#8FA79A;
  --accent:#26E77D;
  --accent-ink:#06130B;
  --font-display:"Outfit",ui-sans-serif,system-ui,sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --gutter-l:max(16px,env(safe-area-inset-left,0px));
  --gutter-r:max(16px,env(safe-area-inset-right,0px));
  color-scheme:dark;
}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--font-display);overflow:hidden;
  padding-left:var(--gutter-l);padding-right:var(--gutter-r);padding-block:0;box-sizing:border-box}
*,*::before,*::after{box-sizing:border-box}

/* the grid: gaps show the rule colour through */
.page{height:100%;display:grid;grid-template-rows:auto 1fr auto auto;gap:1px;background:var(--rule);border-left:1px solid var(--rule);border-right:1px solid var(--rule)}
.cell{background:var(--bg-cell);min-width:0;min-height:0;position:relative}
.mono{font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--fg-dim)}

/* header strip */
.top{display:grid;grid-template-columns:auto 1fr auto;gap:1px;background:var(--rule)}
.top>*{background:var(--bg-cell);display:flex;align-items:center;padding:0 20px;min-height:64px}
.logo{gap:12px;text-decoration:none;color:var(--fg)}
.logo svg{width:30px;height:30px;flex:none}
.logo b{font-weight:600;letter-spacing:-.01em;font-size:18px}
.logo span{font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--fg-dim);display:block;margin-top:1px}
/* section navigator lives in the header: five cells in a row, rules showing through the 1px gaps */
.top .cats{padding:0;background:var(--rule);display:grid;grid-template-columns:auto repeat(4,minmax(0,1fr));gap:1px;align-items:stretch}
.cta{font:500 12px/1 var(--font-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--accent-ink);background:var(--accent);text-decoration:none;padding:14px 22px;clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,10px 100%,0 calc(100% - 10px))}
.cta:hover{background:#4EF097}
.top .cta-cell{padding:0 16px}

/* hero row: 2/3 animation, 1/3 info */
.hero{display:grid;grid-template-columns:2fr 1fr;gap:1px;background:var(--rule);min-height:0}
.stage-cell{overflow:hidden;background:var(--bg-cell);background-image:radial-gradient(ellipse 70% 60% at 50% 50%,var(--bg-glow) 0%,var(--bg-cell) 70%)}
#stage{position:absolute;inset:0;width:100%;height:100%;display:block;cursor:crosshair;touch-action:none}
.stage-info{position:absolute;left:0;top:0;padding:22px 80px 40px 24px;max-width:70%;pointer-events:none;transition:opacity .45s ease,transform .45s ease;background:radial-gradient(ellipse at 0 0,rgba(7,11,9,.92) 0%,rgba(7,11,9,.6) 55%,rgba(7,11,9,0) 100%)}
.stage-info.fade{opacity:0;transform:translateY(6px)}
.stage-info .eyebrow{font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--fg-dim);font-variant-numeric:tabular-nums}
h1{margin:4px 0 0;font-size:clamp(26px,3vw,42px);font-weight:600;line-height:1.05;letter-spacing:-.02em;text-wrap:balance}
.sub{margin:8px 0 0;font-size:clamp(14px,1.3vw,17px);color:var(--fg-dim);font-weight:400}
.hint{position:absolute;left:24px;bottom:18px;margin:0;pointer-events:none}
.corner::before,.corner::after{content:"";position:absolute;width:10px;height:10px;border:1px solid var(--fg-dim);opacity:.6;pointer-events:none}
.corner::before{left:10px;top:10px;border-right:0;border-bottom:0}
.corner::after{right:10px;bottom:10px;border-left:0;border-top:0}

/* right column: three bands of cells */
.info{display:grid;grid-template-rows:auto 1fr;gap:1px;background:var(--rule);min-height:0}
.stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--rule)}
.stat{padding:18px 18px 16px;display:flex;flex-direction:column;gap:6px}
.stat b{font-size:clamp(22px,2.1vw,30px);font-weight:600;letter-spacing:-.02em;line-height:1;font-variant-numeric:tabular-nums}
.stat b em{font-style:normal;color:var(--accent)}
.cat{display:flex;align-items:center;gap:10px;text-align:left;font-family:var(--font-display);color:var(--fg);
  background:var(--bg-cell);border:0;padding:0 18px;min-height:64px;cursor:pointer;position:relative;overflow:hidden;transition:background .25s;white-space:nowrap}
.cat:first-child{padding-right:36px}
.cat .n{font-family:var(--font-mono);font-size:11px;align-self:center;color:var(--fg-dim);letter-spacing:.1em;font-variant-numeric:tabular-nums}
.cat .t{font-size:15px;font-weight:600;letter-spacing:-.01em}
.cat .s{display:none}
.cat::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--accent);transform:scaleX(var(--p,0));transform-origin:left;transition:transform .2s linear}
.cat::before{content:"↗";position:absolute;right:10px;top:8px;font-family:var(--font-mono);font-size:12px;color:var(--fg-dim);transition:color .2s,transform .2s}
.cat:hover{background:#0b1d13}
.cat:hover .t,.cat.active .t{color:var(--accent)}
.cat:hover::before,.cat.active::before{color:var(--accent);transform:translate(2px,-2px)}
.cat.active{background:#0d2417}
.cat:focus-visible,.btn:focus-visible,input:focus-visible,summary:focus-visible,.nav a:focus-visible,.cta:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* live detail of the active section */
.detail{padding:20px 20px 18px;overflow:auto;min-height:0;scrollbar-width:thin;display:flex;flex-direction:column;gap:14px}
.detail-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px}
.detail-head .mono{white-space:nowrap}
.detail h2{margin:0;font-size:20px;font-weight:600;letter-spacing:-.01em}
.detail-intro{margin:-2px 0 0;font-family:var(--font-display);font-size:14px;line-height:1.5;color:var(--fg);max-width:60ch}
.detail h2 small{display:block;font-size:12px;font-weight:400;color:var(--fg-dim);margin-top:4px}
.topics{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.topics li{display:grid;grid-template-columns:auto 1fr;gap:10px;align-items:start;padding-top:10px;border-top:1px solid var(--rule)}
.topics .k{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--accent);padding-top:2px;white-space:nowrap}
.topics .v{font-family:var(--font-mono);font-size:12px;line-height:1.55;color:var(--fg);min-width:0;overflow-wrap:anywhere}
.topics .v span+span::before{content:" · ";color:var(--fg-dim)}
.topics li.group{display:block;padding-top:14px;border-top:0;font-family:var(--font-display);font-size:14px;font-weight:600;color:var(--fg)}
.topics li.group+li{border-top-color:transparent;padding-top:4px}
/* customers: a cell grid like the navigator — the rule colour shows through the 1px gaps */
.topics.clients{gap:1px;background:var(--rule);border:0;border-top:1px solid var(--rule);margin:0 -20px -18px}   /* bleeds to the cell edges: no box inside the box */
.topics li.client{grid-template-columns:120px 1fr;gap:1px;align-items:stretch;padding:0;border:0;background:var(--rule)}
.topics li.client>*{background:var(--bg-cell);padding:14px 16px;min-width:0;position:relative}
.topics li.client .mark{display:flex;align-items:center;justify-content:center;min-height:56px}
.topics li.client img{height:22px;width:auto;max-width:88px;opacity:.85}
.topics li.client svg{width:100%;height:auto;color:var(--fg);opacity:.85}
.of-amazon-agi-labs{fill:currentColor;font-family:angie-sans,Arial,Helvetica,sans-serif;font-size:24px;font-weight:400;letter-spacing:-0.64px}
.topics li.client .wordmark{font-family:var(--font-display);font-weight:700;font-size:15px;letter-spacing:-.01em;color:var(--fg);opacity:.85}
.topics li.client .v{display:flex;flex-direction:column;justify-content:center;gap:5px;margin:0;padding:18px 22px;list-style:none}
.topics li.client .v li{display:block;border:0;margin:0;padding:0 0 0 1.2em;text-indent:-1.2em;font-family:var(--font-mono);font-size:12px;line-height:1.4}
.topics li.client .v li::before{content:"— ";color:var(--accent)}
/* card grid (stage layout "grid"): two columns of cells, rules showing through, bleeding to the cell edges */
.topics.grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:var(--rule);border:0;border-top:1px solid var(--rule);margin:0 -20px -18px}
.topics.grid li.card{display:flex;flex-direction:column;gap:12px;background:var(--bg-cell);padding:18px 20px 20px;border:0;position:relative;min-width:0}
.topics.grid li.card .k{padding-top:0}
.topics.grid li.card .n{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--fg-dim);font-variant-numeric:tabular-nums;margin-bottom:-4px}
.topics.grid li.card ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:5px}
.topics.grid li.card ul li{display:block;border:0;margin:0;padding:0 0 0 1.2em;text-indent:-1.2em;font-family:var(--font-mono);font-size:12px;line-height:1.4;overflow-wrap:anywhere}
.topics.grid li.card ul li::before{content:"— ";color:var(--accent)}
.topics.grid li.cta-card{justify-content:center;align-items:flex-start;gap:14px}
.topics.grid li.cta-card .cta{display:inline-block}
/* experience box under the client grid: text, then the other companies' logos */
.topics li.experience{display:flex;flex-direction:column;gap:12px;background:var(--bg-cell);padding:20px 22px 22px;border:0;position:relative}
.topics li.experience p{margin:0;font-family:var(--font-display);font-size:14px;line-height:1.5;color:var(--fg)}
.topics li.experience .logos{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px 20px;align-items:center;justify-items:center;padding-top:6px}
.topics li.experience .logos img{max-height:22px;max-width:100%;width:auto;height:auto;opacity:.7}
.topics li.experience .wordmark{font-family:var(--font-display);font-weight:700;font-size:14px;letter-spacing:-.01em;color:var(--fg);opacity:.7}
.topics li.intro{display:block;border-top:0;padding-top:0;font-family:var(--font-display);font-size:14px;line-height:1.5;color:var(--fg)}

/* footer: legal line, imprint link, and a blank cell that reveals the settings drawer after three clicks */
.foot{display:grid;grid-template-columns:auto 1fr auto;gap:1px;background:var(--rule)}
.foot-cell{background:var(--bg-cell);min-height:44px;display:flex;align-items:center;padding:0 16px;text-decoration:none;border:0;margin:0}
.foot-link:hover{color:var(--accent)}
.foot-blank{padding:0;cursor:default;-webkit-tap-highlight-color:transparent}
.foot-blank:focus-visible{outline:none}
.drawer[hidden]{display:none}

/* legal page (imprint.html): one reading cell on the same grid */
.legal{padding:28px 24px 36px}
.legal>*{max-width:72ch}
.legal h1{margin:0 0 4px;font-size:24px;font-weight:600;letter-spacing:-.01em}
.legal .mono{display:block;margin-bottom:22px}
.legal h2{margin:22px 0 6px;font-size:14px;font-weight:600;color:var(--fg)}
.legal p{margin:0 0 6px;font-family:var(--font-mono);font-size:12.5px;line-height:1.6;color:var(--fg)}
.legal a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}
.legal a:hover{text-decoration:underline}
.legal .dim{color:var(--fg-dim)}
.foot.simple{grid-template-columns:1fr auto}

/* bottom drawer: settings */
.drawer{position:relative;background:var(--bg-cell);display:grid;grid-template-rows:auto 0fr;transition:grid-template-rows .35s ease}
.drawer.open{grid-template-rows:auto minmax(0,42vh)}
.drawer-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:0 16px;min-height:44px;flex-wrap:wrap}
.drawer-bar .left,.drawer-bar .right{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.btn{font:500 11px/1 var(--font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--fg);background:transparent;border:1px solid var(--rule);border-radius:999px;padding:9px 14px;min-height:32px;cursor:pointer;transition:background .2s,border-color .2s,color .2s}
.btn:hover{border-color:var(--accent);color:var(--accent)}
.btn.on{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.btn.on:hover{color:var(--accent-ink)}
.seg{display:inline-flex;border:1px solid var(--rule);border-radius:999px;overflow:hidden}
.seg .btn{border:0;border-radius:0}
.seg .btn+.btn{border-left:1px solid var(--rule)}
.drawer-body{overflow:auto;min-height:0;border-top:1px solid var(--rule);scrollbar-width:thin}
.drawer:not(.open) .drawer-body{border-top:0}
.settings{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:1px;background:var(--rule);font-family:var(--font-mono);font-size:11px;margin:0}
details{background:var(--bg-cell);padding-bottom:6px}
summary{cursor:pointer;padding:10px 14px;letter-spacing:.1em;text-transform:uppercase;color:var(--fg-dim);list-style:none;display:flex;justify-content:space-between}
summary::after{content:"+";color:var(--fg-dim)}
details[open] summary::after{content:"–"}
summary:hover{color:var(--fg)}
.row{display:grid;grid-template-columns:1fr auto;gap:2px 8px;padding:5px 14px 7px;align-items:center}
.row label{color:var(--fg);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.row output{color:var(--accent);font-variant-numeric:tabular-nums;text-align:right}
.row input[type=range]{grid-column:1/3;width:100%;margin:0;accent-color:var(--accent);height:18px;cursor:pointer}
.row.check{grid-template-columns:auto 1fr;padding-block:6px}
.row.check input{accent-color:var(--accent);width:16px;height:16px;margin:0}
.json{display:block;width:100%;margin:0;padding:10px 14px;font:11px/1.4 var(--font-mono);color:var(--fg-dim);background:var(--bg-cell);border:0;border-top:1px solid var(--rule);resize:vertical;min-height:100px}
.json[hidden]{display:none}

@media (max-width:900px){
  .stats{display:none}
  h1{font-size:24px}
  body{padding-left:0;padding-right:0}   /* grid runs edge to edge on phones */
  .page{border-left:0;border-right:0}
  .top>*{padding:0 12px;min-height:56px}
  .top .cta-cell{padding:0 10px}
  .cta{padding:12px 14px}
  .stage-info{padding:14px 40px 28px 14px;max-width:85%}
  .cat{padding:12px 12px 14px;min-height:72px}
  .cat:first-child{min-height:60px}
  .cat .t{font-size:16px}
  .detail{padding:14px 12px 12px}
  .topics .k{font-size:10px}
  .topics .v{font-size:11.5px}
  .topics.clients,.topics.grid{margin:0 -12px -12px}
  .topics.grid li.card{padding:14px 12px 16px}
  .topics li.client{grid-template-columns:90px 1fr}
  .topics li.client>*{padding:10px 12px}
  .topics li.experience{padding:14px 12px 16px}
  .topics li.experience .logos{grid-template-columns:repeat(3,minmax(0,1fr))}
  .topics li.client img{max-width:70px}
  .drawer-bar{padding:0 10px}
  body{overflow:auto}
  .page{height:auto;min-height:100%}
  .top{grid-template-columns:1fr auto;position:sticky;top:0;z-index:20;box-shadow:0 1px 0 var(--rule)}   /* sticky header; the shadow keeps the rule under it while scrolled */
  .top .cats{grid-column:1/-1;order:1;grid-template-columns:repeat(5,minmax(0,1fr))}
  .cat{padding:0 8px;min-height:48px;gap:6px;flex-direction:column;align-items:flex-start;justify-content:center;white-space:normal}
  .cat .t{font-size:12px}
  .cat::before{display:none}
  .hero{grid-template-columns:1fr;grid-template-rows:auto 1fr}   /* leftover height goes to the detail row, so nothing shifts when its content renders */
  .stage-cell{aspect-ratio:auto;height:50vh;height:50svh;max-height:none}   /* half the screen on phones */
  .stage-info{max-width:80%}
  .hint{display:none}
  .stats .stat b{font-size:24px}
  .drawer.open{grid-template-rows:auto minmax(0,60vh)}
}
@media (prefers-reduced-motion:reduce){ .stage-info,.cat,.drawer{transition:none} }