/* ===== ruos website — technical-docs system ===== */
:root{
  --bg:        #1c1a17;
  --bg-2:      #232019;
  --ink:       #f3efe6;
  --ink-soft:  #cbc5b9;
  --muted:     #978f82;
  --faint:     #6c665b;
  --line:      #34302a;
  --line-2:    #443f37;
  --paper:     #2a261e;
  --accent:    oklch(0.66 0.16 45);
  --accent-d:  oklch(0.80 0.11 50);
  --accent-w:  oklch(0.70 0.16 48 / 0.18);
  --term-bg:   #131218;
  --term-bg-2: #1c1b24;
  --term-line: #2c2a37;
  --term-fg:   #d7d4e0;
  --term-dim:  #837fa0;
  --green:     oklch(0.80 0.14 150);
  --sans: 'IBM Plex Sans', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --maxw: 1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:92px;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--sans);font-size:19px;line-height:1.6;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
p{margin:0}
b,strong{font-weight:600}
.mono{font-family:var(--mono)}
.accent{color:var(--accent-d)}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 40px}

/* ---------- nav ---------- */
.nav{
  position:sticky;top:0;z-index:50;
  background:color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter:blur(12px) saturate(1.2);
  border-bottom:1px solid var(--line);
}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--mono);font-weight:600;font-size:20px;letter-spacing:-.01em}
.brand .dot{width:10px;height:10px;border-radius:50%;background:var(--accent);display:inline-block}
.navlinks{display:flex;gap:30px;font-family:var(--mono);font-size:15px;color:var(--ink-soft);letter-spacing:.02em}
.navlinks a{position:relative;padding:4px 0;transition:color .15s}
.navlinks a:hover{color:var(--accent-d)}
.navlinks a::after{content:"";position:absolute;left:0;right:100%;bottom:-2px;height:1.5px;background:var(--accent);transition:right .2s}
.navlinks a:hover::after{right:0}
.btn{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--mono);font-size:15px;font-weight:500;
  padding:10px 18px;border-radius:9px;border:1px solid var(--ink);
  background:var(--ink);color:var(--bg);transition:transform .12s, background .15s;
}
.btn:hover{transform:translateY(-1px);background:#fff}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line-2)}
.btn.ghost:hover{background:var(--bg-2);border-color:var(--ink-soft)}
.btn svg{width:16px;height:16px}
.nav-cta{display:flex;align-items:center;gap:14px}

/* ---------- shared section bits ---------- */
section{position:relative}
.sec{padding:108px 0}
.sec.tight{padding:84px 0}
.eyebrow{
  font-family:var(--mono);font-size:14px;font-weight:500;
  letter-spacing:.24em;text-transform:uppercase;color:var(--accent-d);
  display:flex;align-items:center;gap:13px;margin-bottom:22px;
}
.eyebrow::before{content:"";width:30px;height:2px;background:var(--accent)}
.sec h2{font-size:clamp(34px,4.4vw,58px);line-height:1.05;font-weight:600;letter-spacing:-.02em;margin:0 0 22px;text-wrap:balance}
.sec .lede{font-size:clamp(19px,2vw,23px);line-height:1.5;color:var(--ink-soft);max-width:60ch}
.divider{height:1px;background:var(--line);max-width:var(--maxw);margin:0 auto}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:96px 0 88px}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;z-index:0;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:46px 46px;
  -webkit-mask-image:radial-gradient(130% 100% at 80% 0%, #000 0%, transparent 60%);
          mask-image:radial-gradient(130% 100% at 80% 0%, #000 0%, transparent 60%);
  opacity:.6;
}
.hero .wrap{position:relative;z-index:1}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:64px;align-items:center}
.hero .logo{
  font-family:var(--mono);font-weight:600;font-size:clamp(64px,9vw,128px);line-height:.9;
  letter-spacing:-.05em;color:var(--ink);margin:0 0 30px;white-space:nowrap;
  display:flex;align-items:flex-end;
}
.hero .logo .path{color:var(--accent-d);font-weight:500;opacity:.78;margin-right:.04em;letter-spacing:-.04em}
.hero .logo .cur{
  display:inline-block;width:.58em;height:.12em;margin-left:.08em;margin-bottom:.06em;
  border-radius:1px;background:var(--accent);
}
.brand .path,.fbrand .path{color:var(--accent-d);opacity:.78;font-weight:500}
.brand .cur,.fbrand .cur{display:inline-block;width:.55em;height:2px;background:var(--accent);margin-left:.06em;vertical-align:0;border-radius:1px}
@media (prefers-reduced-motion:no-preference){
  .hero .logo .cur,.brand .cur,.fbrand .cur{animation:caret-blink 1.15s steps(1,end) infinite}
  @keyframes caret-blink{50%{opacity:0}}
}
.hero h1{font-size:clamp(40px,6vw,80px);line-height:1;font-weight:700;letter-spacing:-.03em;margin:0 0 26px;text-wrap:balance}
.hero .sub{font-size:clamp(19px,2.1vw,24px);line-height:1.5;color:var(--ink-soft);max-width:38ch;margin-bottom:34px}
.hero .sub b{color:var(--ink)}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:34px}
.hero-cta .btn{font-size:16px;padding:13px 22px}
.chips{display:flex;flex-wrap:wrap;gap:9px}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:14px;font-weight:500;
  padding:7px 13px;border:1px solid var(--line-2);border-radius:8px;background:var(--paper);color:var(--ink-soft);
}
.tick{color:var(--green);font-family:var(--mono);font-weight:600}
.tick.dim{color:var(--accent)}

/* terminal */
.term{
  background:var(--term-bg);border:1px solid var(--term-line);border-radius:14px;
  font-family:var(--mono);color:var(--term-fg);overflow:hidden;
  box-shadow:0 34px 70px -40px rgba(20,18,30,.55);
}
.term .bar{display:flex;align-items:center;gap:8px;padding:13px 18px;background:var(--term-bg-2);border-bottom:1px solid var(--term-line)}
.term .bar i{width:11px;height:11px;border-radius:50%;background:#3a3850;display:block}
.term .bar i:nth-child(1){background:#e0604d}.term .bar i:nth-child(2){background:#e0a93d}.term .bar i:nth-child(3){background:#57b96b}
.term .bar span{margin-left:9px;color:var(--term-dim);font-size:13px;letter-spacing:.04em}
.term .body{padding:22px 24px;font-size:15.5px;line-height:1.7;white-space:pre-wrap;word-break:break-word}
.term .body .pr{color:var(--green)}
.term .body .di{color:var(--term-dim)}
.term .body .ac{color:#f0a07e}
.term .body .ok{color:var(--green)}
.term .body .bd{color:#3c3a4d}
.cursor{background:var(--green);color:var(--term-bg)}

/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line-2);border-bottom:1px solid var(--line-2)}
.stat{padding:34px 30px;border-right:1px solid var(--line)}
.stat:last-child{border-right:none}
.stat .kpi{font-family:var(--mono);font-weight:600;font-size:clamp(40px,4.6vw,58px);line-height:1;letter-spacing:-.02em}
.stat .kpi small{font-size:.5em;color:var(--accent-d)}
.stat .lbl{font-family:var(--mono);font-size:14px;color:var(--muted);margin-top:10px}

/* ---------- cards / panels ---------- */
.panel{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:30px 32px}
.panel.flat{background:var(--bg-2)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.list{display:flex;flex-direction:column;gap:13px;font-size:18px;line-height:1.4}
.list .row{display:flex;gap:13px;align-items:flex-start}
.list.soft .row{color:var(--ink-soft)}

.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feature{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:28px 30px}
.feature .tag{font-family:var(--mono);font-size:14px;letter-spacing:.08em;color:var(--accent-d);margin-bottom:14px}
.feature h3{font-size:25px;font-weight:600;margin:0 0 10px;letter-spacing:-.01em}
.feature p{font-family:var(--mono);font-size:15px;color:var(--muted);line-height:1.55}
.feature.dark{background:var(--bg-2);border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-w)}
.feature.dark .tag{color:var(--green)}
.feature.dark p{color:var(--ink-soft)}
.feature .ficon{width:46px;height:46px;border-radius:11px;background:var(--bg-2);border:1px solid var(--line);display:grid;place-items:center;margin-bottom:18px}
.feature .ficon svg{width:23px;height:23px;color:var(--accent-d);stroke-width:1.75}
.feature.dark .ficon{background:rgba(255,255,255,.04);border-color:var(--line-2)}
.feature.dark .ficon svg{color:var(--green)}

/* ---------- tech strip (real brand logos · Simple Icons) ---------- */
.techstrip{display:flex;align-items:center;gap:40px;padding:30px 0;flex-wrap:wrap}
.techstrip .tl{font-family:var(--mono);font-size:13px;letter-spacing:.18em;text-transform:uppercase;color:var(--faint);white-space:nowrap}
.techstrip .logos{display:flex;align-items:center;gap:38px;flex-wrap:wrap;flex:1}
.techstrip .logos a{display:inline-flex;align-items:center;gap:11px;text-decoration:none;color:var(--muted);transition:color .18s,opacity .18s;opacity:.72}
.techstrip .logos a:hover{opacity:1;color:var(--ink-soft)}
.techstrip .logos img{width:26px;height:26px;display:block;filter:grayscale(1) brightness(0) invert(.78);transition:filter .18s}
.techstrip .logos a:hover img{filter:none}
.techstrip .logos .nm{font-family:var(--mono);font-size:14px;font-weight:500;letter-spacing:-.01em}
@media(max-width:760px){.techstrip{gap:22px}.techstrip .logos{gap:24px}.techstrip .logos .nm{display:none}}

/* ---------- desktop apps row ---------- */
.appsrow{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-top:46px}
.apptile{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:22px 20px;display:flex;flex-direction:column;gap:12px;transition:border-color .18s,transform .18s}
.apptile:hover{border-color:var(--line-2);transform:translateY(-2px)}
.apptile .ai{width:42px;height:42px;border-radius:10px;background:var(--bg-2);border:1px solid var(--line);display:grid;place-items:center}
.apptile .ai svg{width:21px;height:21px;color:var(--accent-d);stroke-width:1.75}
.apptile .an{font-size:18px;font-weight:600;letter-spacing:-.01em}
.apptile .ad{font-family:var(--mono);font-size:13px;color:var(--muted);line-height:1.45}
@media(max-width:860px){.appsrow{grid-template-columns:repeat(2,1fr)}}

/* split layout */
.split{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.split.lead-left{grid-template-columns:1.05fr .95fr}

/* boot pipeline */
.pipe{display:flex;align-items:stretch;gap:0;flex-wrap:wrap}
.pipe .node{flex:1;min-width:180px;text-align:center}
.pipe .node .nlbl{font-family:var(--mono);font-size:13px;letter-spacing:.12em;color:var(--accent-d);margin-bottom:12px}
.pipe .box{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:20px 18px}
.pipe .box.hl{border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-w)}
.pipe .box .bt{font-family:var(--mono);font-size:20px;font-weight:600}
.pipe .box .bs{font-family:var(--mono);font-size:13px;color:var(--muted);margin-top:5px}
.pipe .arrow{flex:0 0 56px;display:flex;align-items:center;justify-content:center;color:var(--accent);font-family:var(--mono);font-size:24px}
.phase{margin-top:34px;background:var(--bg-2);border:1px solid var(--line);border-radius:14px;padding:26px 30px}
.phase .h{font-family:var(--mono);font-size:14px;letter-spacing:.12em;color:var(--accent-d);margin-bottom:18px}
.phase .seq{display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-family:var(--mono);font-size:15px}
.phase .seq .accent{font-size:18px}

/* architecture stack */
.stack-rows{display:flex;flex-direction:column;gap:14px}
.arow{display:grid;grid-template-columns:118px 1fr;gap:22px;align-items:center}
.arow .alabel{font-family:var(--mono);font-size:12.5px;font-weight:500;letter-spacing:.16em;text-transform:uppercase;color:var(--accent-d);text-align:right;align-self:center;position:relative}
.arow .alabel .ln{display:block;font-size:11px;color:var(--faint);letter-spacing:.08em;margin-top:5px;text-transform:none}
.srow{display:grid;grid-template-columns:1fr 1fr;gap:13px}
.scell{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:18px 22px}
.scell .st{font-family:var(--mono);font-size:18px;font-weight:600}
.scell .ss{font-family:var(--mono);font-size:14px;color:var(--muted);margin-top:5px}
.sandbox{position:relative;border:1.5px dashed var(--accent);border-radius:14px;padding:18px;background:var(--accent-w)}
.sandbox .blab{position:absolute;top:-11px;left:22px;background:var(--bg);padding:0 10px;font-family:var(--mono);font-size:13px;color:var(--accent-d);letter-spacing:.08em}
.sandbox .abi{text-align:center;font-family:var(--mono);font-size:14.5px;color:var(--ink-soft);margin-top:13px}
.kernrow{background:var(--bg-2);border:1px solid var(--line);border-radius:12px;padding:16px 18px;display:flex;flex-wrap:wrap;gap:9px}
.hwrow{background:#110f0c;border:1px solid var(--line);border-radius:12px;padding:16px 22px;display:flex;flex-wrap:wrap;gap:14px 18px;justify-content:space-between;font-family:var(--mono);font-size:15px;color:var(--ink-soft)}
.hwrow span{display:inline-flex;align-items:center;gap:9px}
.hwrow span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);opacity:.65;flex:none}

/* gui mock */
.gui{position:relative;background:#23222c;border:1px solid #34323f;border-radius:16px;padding:13px;box-shadow:0 30px 70px -38px rgba(20,18,30,.6);aspect-ratio:16/11}
.gui .scr{position:relative;width:100%;height:100%;background:linear-gradient(135deg,#2c2a36,#211f29);border-radius:9px;overflow:hidden}
.win{position:absolute;background:#f3f1ea;border-radius:8px;box-shadow:0 16px 30px -12px rgba(0,0,0,.5);overflow:hidden}
.win .tb{display:flex;align-items:center;gap:6px;background:#e0ddd4;padding:8px 11px}
.win .tb i{width:8px;height:8px;border-radius:50%}
.win .tb i:nth-child(1){background:#e0604d}.win .tb i:nth-child(2){background:#e0a93d}.win .tb i:nth-child(3){background:#57b96b}
.win .tb span{font-family:var(--mono);font-size:11px;color:#8a857a;margin-left:5px}
.bar-line{height:8px;border-radius:3px;background:#d7d3c8;margin-bottom:8px}
.dock{position:absolute;left:50%;bottom:9px;transform:translateX(-50%);display:flex;gap:7px;background:rgba(20,18,26,.6);backdrop-filter:blur(4px);padding:6px 9px;border-radius:10px}
.dock i{width:18px;height:18px;border-radius:5px;display:block}

/* tools */
.tools{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.toolcard{background:var(--bg-2);border:1px solid var(--line);border-radius:14px;padding:26px 28px}
.toolcard .tag{font-family:var(--mono);font-size:14px;letter-spacing:.1em;color:var(--accent-d);margin-bottom:14px}
.toolcard .cmds{font-family:var(--mono);font-size:17px;line-height:1.85;color:var(--ink-soft);word-spacing:5px}

/* status */
.steps{display:grid;grid-template-columns:1fr 1fr;gap:11px 48px}
.step{display:flex;gap:14px;align-items:baseline;font-size:18px}
.step .n{font-family:var(--mono);color:var(--faint);width:58px;flex:none;white-space:nowrap}

/* security */
.ceil{border-color:var(--accent)}
.kbd{font-family:var(--mono);font-size:.92em;background:var(--bg-2);border:1px solid var(--line);border-radius:5px;padding:1px 6px}

/* get started / dark band */
.band{background:#1c1a17;color:#f1ede4;position:relative;overflow:hidden}
.band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:46px 46px;-webkit-mask-image:radial-gradient(120% 100% at 20% 0%,#000,transparent 65%);mask-image:radial-gradient(120% 100% at 20% 0%,#000,transparent 65%);
}
.band .wrap{position:relative;z-index:1}
.band .eyebrow{color:#f0a07e}
.band h2{color:#fff}
.band .lede{color:#cfcabf}
.band .chip{background:#252320;border-color:#36332d;color:#e7e2d8}

/* footer */
.footer{border-top:1px solid var(--line);padding:48px 0 56px}
.footer .wrap{display:flex;justify-content:space-between;align-items:flex-start;gap:40px;flex-wrap:wrap}
.footer .fbrand{font-family:var(--mono);font-weight:600;font-size:19px;display:flex;align-items:center;gap:10px}
.footer .fmeta{font-family:var(--mono);font-size:14px;color:var(--muted);margin-top:12px;max-width:46ch;line-height:1.6}
.footer .fcols{display:flex;gap:64px;font-family:var(--mono);font-size:15px}
.footer .fcol{display:flex;flex-direction:column;gap:12px}
.footer .fcol .ch{color:var(--faint);font-size:13px;letter-spacing:.1em;text-transform:uppercase;margin-bottom:2px}
.footer .fcol a{color:var(--ink-soft);transition:color .15s}
.footer .fcol a:hover{color:var(--accent-d)}

/* ---------- scroll reveal — CSS-only, always-visible fallback ---------- */
.reveal{opacity:1}
@media (prefers-reduced-motion:no-preference){
  @supports (animation-timeline: view()){
    .reveal{animation:reveal-in linear both;animation-timeline:view();animation-range:entry 4% entry 36%}
    @keyframes reveal-in{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}
  }
}

/* ---------- responsive ---------- */
@media (max-width:1020px){
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .split,.split.lead-left{grid-template-columns:1fr;gap:36px}
  .grid3{grid-template-columns:1fr 1fr}
  .navlinks{display:none}
}
@media (max-width:760px){
  body{font-size:17px}
  .wrap{padding:0 22px}
  .sec{padding:72px 0}
  .stats{grid-template-columns:1fr 1fr}
  .stat:nth-child(2){border-right:none}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
  .two,.tools,.steps,.srow{grid-template-columns:1fr}
  .arow{grid-template-columns:1fr;gap:10px}
  .arow .alabel{text-align:left}
  .grid3{grid-template-columns:1fr}
  .pipe .arrow{flex-basis:100%;transform:rotate(90deg);height:34px}
  .hwrow{justify-content:flex-start;gap:14px}
  .footer .fcols{gap:36px}
  .nav-cta .btn.ghost{display:none}
}