:root{
  --bg:#071018;--bg2:#0B1825;--card:#12263A;--card2:#173049;
  --line:#2A4766;--line2:#3B6288;
  --text:#F1F6FA;--body:#CBD8E5;--mute:#9DB0C4;
  --accent:#35E0A1;--accent-d:#04140D;--amber:#FFB547;--sky:#5CB8FF;
  --font:"Manrope",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --r:14px
}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:400 1.0625rem/1.7 var(--font);overflow-x:hidden}
img,svg{max-width:100%}a{color:inherit}
.wrap{max-width:1120px;margin:0 auto;padding:0 1.25rem}
.skip{position:absolute;left:-999px;top:0;background:var(--accent);color:var(--accent-d);padding:.6rem 1rem;z-index:20}.skip:focus{left:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:3px}
.mute{color:var(--mute)}.small{font-size:.9rem}
.hd{position:sticky;top:0;z-index:10;background:rgba(7,16,24,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.hd-in{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:64px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:.6rem;text-decoration:none;font:700 1.3rem var(--font);letter-spacing:-.01em}
nav{display:flex;gap:1.6rem;flex-wrap:wrap}
nav a{text-decoration:none;color:var(--mute);font-size:.98rem;font-weight:500;padding:.3rem 0;border-bottom:2px solid transparent}
nav a:hover,nav a[aria-current]{color:var(--text);border-bottom-color:var(--accent)}
.menu{display:none;background:var(--card);border:1px solid var(--line2);color:var(--text);font:inherit;padding:.4rem .9rem;border-radius:8px;cursor:pointer}
.js .menu{display:block}.js nav{display:none;width:100%;flex-direction:column;gap:.2rem;padding-bottom:1rem}.js nav.open{display:flex}
@media(min-width:760px){.js .menu{display:none}.js nav{display:flex;width:auto;flex-direction:row;gap:1.6rem;padding:0}}
h1,h2,h3{font-family:var(--font);margin:0}
h2{font-weight:700;font-size:clamp(1.7rem,3.6vw,2.6rem);line-height:1.2;letter-spacing:-.02em;max-width:26ch;margin-bottom:1.4rem}
h3{font-weight:600;font-size:1.2rem;line-height:1.3;margin-bottom:.5rem;color:var(--text)}
p{margin:0 0 1.1rem}.body{max-width:66ch;color:var(--body)}
.sec{padding:clamp(3.5rem,8vw,6rem) 0;border-top:1px solid var(--line)}
.sec.alt{background:var(--bg2)}.sec.tight{padding:2.5rem 0}
.hero{padding:clamp(3rem,8vw,6rem) 0 clamp(2.5rem,6vw,4.5rem);background:radial-gradient(900px 420px at 88% -10%,rgba(53,224,161,.13),transparent 65%)}
.hero h1{display:flex;flex-direction:column;gap:.5rem;margin-bottom:1.6rem}
.wm{font-size:clamp(3.2rem,12vw,7.5rem);font-weight:800;letter-spacing:-.04em;line-height:1}
.tag{font-size:clamp(1.2rem,3vw,2rem);font-weight:500;color:var(--accent);line-height:1.25;letter-spacing:-.01em}
.lede{font:500 clamp(1.2rem,2.4vw,1.65rem)/1.4 var(--font);letter-spacing:-.01em;max-width:36ch;margin-bottom:1.2rem}
.phead{padding:clamp(3rem,7vw,5.5rem) 0 clamp(2rem,4vw,3rem);background:radial-gradient(700px 320px at 90% -20%,rgba(53,224,161,.1),transparent 65%)}
.phead h1{font-size:clamp(2.6rem,7vw,4.8rem);font-weight:800;letter-spacing:-.035em;line-height:1.05;margin-bottom:1.4rem}
.cta-row{display:flex;gap:.8rem;flex-wrap:wrap;margin:1.8rem 0 0}
.btn{display:inline-block;text-decoration:none;padding:.8rem 1.5rem;border:1px solid var(--line2);border-radius:10px;font-weight:600;background:var(--card);transition:border-color .2s,background .2s}
.btn:hover{border-color:var(--accent);background:var(--card2)}
.btn-p{background:var(--accent);border-color:var(--accent);color:var(--accent-d)}.btn-p:hover{background:#5CEBB8;border-color:#5CEBB8}
.lnk{color:var(--accent);font-weight:600;text-underline-offset:4px}

/* diagram */
.diagram{margin:clamp(2.5rem,6vw,4rem) 0 0;padding:clamp(.8rem,2vw,1.6rem);border:1px solid var(--line2);border-radius:var(--r);background:var(--bg2)}
.diagram figcaption{color:var(--mute);font-size:.88rem;margin-top:.8rem}
.flow{display:block;width:100%;height:auto}.flow-v{display:none;max-width:420px;margin:0 auto}
@media(max-width:699px){.flow-h{display:none}.flow-v{display:block}}
.flow .base{fill:none;stroke:var(--line);stroke-width:1.5}
.flow .fl{fill:none;stroke-width:2;stroke-dasharray:3 9;stroke-linecap:round;animation:dash 1.6s linear infinite}
.flow .in{stroke:var(--amber)}.flow .out{stroke:var(--accent)}
@keyframes dash{to{stroke-dashoffset:-24}}
.flow .nd{fill:var(--card);stroke:var(--line2)}.flow .core{fill:#0E2B2C;stroke:var(--accent);stroke-width:2}
.flow text{text-anchor:middle;dominant-baseline:central;fill:var(--text);font-family:var(--font);font-weight:500}
.flow .nt{font-size:15px}.flow-v .nt{font-size:13px}
.flow .ct{font-weight:700;fill:var(--accent)}.flow .cs{fill:var(--body);font-weight:400}

/* chain (flow of boxes with centred arrows) */
.chain{display:flex;flex-direction:column;align-items:stretch;gap:0;max-width:640px;margin:1.8rem 0 2rem;text-align:center}
.chain>div:not(.arrow){border:1px solid var(--line2);padding:1rem 1.3rem;border-radius:12px;background:var(--card);color:var(--text)}
.chain .arrow{position:relative;height:38px;font-size:0;line-height:0;color:transparent;overflow:hidden}
.chain .arrow:before{content:"";position:absolute;left:50%;top:6px;height:18px;width:2px;margin-left:-1px;background:var(--accent)}
.chain .arrow:after{content:"";position:absolute;left:50%;top:15px;width:10px;height:10px;margin-left:-5px;border-right:2px solid var(--accent);border-bottom:2px solid var(--accent);transform:rotate(45deg)}
.chain .hot{border-color:var(--amber)!important;color:var(--amber)!important;background:rgba(255,181,71,.09)!important;font-weight:600}
.chain.row{flex-direction:row;flex-wrap:wrap;justify-content:center;align-items:center;max-width:none;gap:0}
.chain.row>div:not(.arrow){flex:0 1 auto}
.chain.row .arrow{width:38px;height:20px}
.chain.row .arrow:before{left:6px;top:50%;margin:-1px 0 0;width:18px;height:2px}
.chain.row .arrow:after{left:15px;top:50%;margin:-5px 0 0;transform:rotate(-45deg)}
@media(max-width:899px){
  .chain.row{flex-direction:column;align-items:stretch;max-width:640px;justify-content:flex-start}
  .chain.row .arrow{width:auto;height:38px}
  .chain.row .arrow:before{left:50%;top:6px;margin:0 0 0 -1px;width:2px;height:18px}
  .chain.row .arrow:after{left:50%;top:15px;margin:0 0 0 -5px;transform:rotate(45deg)}
}

blockquote{margin:2rem 0 0;padding:1.4rem 1.6rem;border:1px solid var(--line2);border-left:4px solid var(--accent);border-radius:var(--r);background:var(--card);font:600 clamp(1.25rem,2.6vw,1.8rem)/1.35 var(--font);letter-spacing:-.01em;max-width:34ch}

/* card grids */
.cols3,.cols2{display:grid;gap:1.2rem;margin:1.8rem 0 2rem}
.cols3>div,.cols2>div{background:var(--card);border:1px solid var(--line2);border-top:3px solid var(--accent);border-radius:var(--r);padding:1.5rem 1.5rem 1.4rem}
.cols3 p,.cols2 p{color:var(--body);margin:0}
@media(min-width:760px){.cols3{grid-template-columns:repeat(3,1fr)}.cols2{grid-template-columns:repeat(2,1fr)}}
.pair{display:grid;gap:1.2rem;margin:2rem 0}
.pair>div{background:var(--card);border:1px solid var(--line2);border-left:4px solid var(--line2);border-radius:var(--r);padding:1.3rem 1.5rem}
.pair>div:first-child{border-left-color:var(--sky)}.pair>div:last-child{border-left-color:var(--accent)}
.q{color:var(--mute);font-size:.95rem;font-weight:500;margin:0 0 .3rem}.big{font:700 clamp(1.4rem,3vw,2rem)/1.2 var(--font);letter-spacing:-.02em;margin:0}
@media(min-width:760px){.pair{grid-template-columns:1fr 1fr}}
.loop{list-style:none;margin:2rem 0 1rem;padding:0;display:grid;gap:1.2rem;counter-reset:s}
.loop li{background:var(--card);border:1px solid var(--line2);border-radius:var(--r);padding:1.4rem 1.5rem;counter-increment:s}
.loop li:before{content:counter(s);display:grid;place-items:center;width:2.1rem;height:2.1rem;margin-bottom:.9rem;border-radius:50%;background:rgba(53,224,161,.14);border:1px solid var(--accent);color:var(--accent);font:700 .9rem var(--font)}
.loop p{color:var(--body);margin:0}
@media(min-width:760px){.loop{grid-template-columns:repeat(3,1fr)}}
.tags{list-style:none;padding:0;margin:1.8rem 0 0;display:flex;flex-wrap:wrap;gap:.7rem}
.tags li{background:var(--card);border:1px solid var(--line2);border-radius:999px;padding:.45rem 1.1rem;font-size:.95rem;font-weight:500;color:var(--text)}
.plain{padding-left:1.1rem;margin:0;color:var(--body)}.plain li{margin-bottom:.5rem}.plain li::marker{color:var(--accent)}

/* hardware-agnostic stack */
.stack{max-width:720px;margin:1.8rem 0 1.2rem;display:grid;gap:.8rem;text-align:center}
.stack>div{border:1px solid var(--line2);border-radius:12px;padding:1rem;background:var(--card)}
.stack-top{border-color:var(--accent)!important;background:#0E2B2C!important;color:var(--accent);font-weight:700;font-size:1.15rem}
.stack-row{display:grid;gap:.8rem;border:0!important;padding:0!important;background:none!important}
.stack-row>div{border:1px solid var(--line2);border-radius:12px;padding:1rem;background:var(--card);font-weight:600}
.stack-row span{display:block;color:var(--mute);font-size:.88rem;font-weight:400}
@media(min-width:600px){.stack-row{grid-template-columns:repeat(3,1fr)}}

/* ladder */
.ladder{list-style:none;margin:2rem 0;padding:0;display:grid;gap:.8rem;max-width:760px;counter-reset:l}
.ladder li{position:relative;counter-increment:l;background:var(--card);border:1px solid var(--line2);border-radius:var(--r);padding:1rem 1.3rem 1rem 4.2rem;font:600 clamp(1.05rem,2.2vw,1.3rem)/1.35 var(--font);letter-spacing:-.01em}
.ladder li:before{content:counter(l);position:absolute;left:1.2rem;top:50%;transform:translateY(-50%);display:grid;place-items:center;width:2rem;height:2rem;border-radius:50%;background:rgba(53,224,161,.14);border:1px solid var(--accent);color:var(--accent);font:700 .85rem var(--font)}
.ladder.big li{padding-top:1.2rem;padding-bottom:1.2rem}
.ladder.big li:before{top:1.25rem;transform:none}
.ladder.big li b{display:block;font-weight:700;font-size:clamp(1.2rem,2.6vw,1.55rem)}
.ladder.big li span{display:block;font:400 1rem/1.6 var(--font);color:var(--body);max-width:60ch;margin-top:.3rem;letter-spacing:0}

.status{max-width:72ch;color:var(--body);margin:0;font-size:.98rem;padding:1.1rem 1.4rem;background:var(--card);border:1px solid var(--line2);border-left:4px solid var(--amber);border-radius:var(--r)}
.mailbox{border:1px solid var(--line2);border-radius:var(--r);padding:1.5rem;max-width:560px;background:var(--card)}
.mailbox p{margin:0}.mailbox a{color:var(--accent);font:600 1.4rem var(--font);text-underline-offset:5px}
.ft{border-top:1px solid var(--line);padding:3rem 0 2.5rem;background:var(--bg2)}
.ft-top{display:flex;justify-content:space-between;gap:2rem;flex-wrap:wrap;margin-bottom:1.6rem}
.ft-name{font:700 1.4rem var(--font);margin:0}
.ft-links{list-style:none;margin:0;padding:0;display:flex;gap:1.4rem;flex-wrap:wrap}
.ft-links a{text-decoration:none;color:var(--mute);font-weight:500}.ft-links a:hover{color:var(--accent)}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}