:root{
  --ink:#070a0f;
  --ink-2:#0b1016;
  --panel:#0e141d;
  --panel-2:#121a25;
  --text:#e9eef5;
  --muted:#8a97a8;
  --faint:#5c6878;
  --lime:#c8ff4d;
  --lime-dim:#9bcf2f;
  --cyan:#5ce8e0;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.05);
  --display:"Bricolage Grotesque",sans-serif;
  --body:"Hanken Grotesk",sans-serif;
  --mono:"JetBrains Mono",ui-monospace,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--body);background:var(--ink);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}

/* ---- atmospheric background ---- */
.bg{position:fixed;inset:0;z-index:-2;pointer-events:none;background:var(--ink)}
.bg::before{content:"";position:absolute;inset:0;opacity:.5;
  background-image:radial-gradient(rgba(255,255,255,.10) 1px,transparent 1px);background-size:34px 34px;
  -webkit-mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 30%,transparent 80%);
  mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 30%,transparent 80%)}
.blob{position:fixed;z-index:-1;border-radius:50%;filter:blur(90px);opacity:.32;pointer-events:none}
.blob.a{width:560px;height:560px;background:radial-gradient(circle,#3a5d10,transparent 70%);top:-180px;left:-120px;animation:drift1 22s ease-in-out infinite}
.blob.b{width:480px;height:480px;background:radial-gradient(circle,#0c5450,transparent 70%);top:240px;right:-160px;animation:drift2 26s ease-in-out infinite}
.grain{position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.05;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
@keyframes drift1{50%{transform:translate(80px,60px) scale(1.15)}}
@keyframes drift2{50%{transform:translate(-70px,-50px) scale(1.1)}}

.wrap{max-width:1120px;margin:0 auto;padding:0 28px}

/* ---- nav ---- */
nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);background:linear-gradient(var(--ink),rgba(7,10,15,.55));border-bottom:1px solid var(--line-2)}
nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-family:var(--mono);font-weight:700;letter-spacing:-.5px;font-size:1.02rem;display:flex;align-items:center;gap:9px;color:var(--text);text-decoration:none}
.brand .mark{color:var(--lime);transform:translateY(1px)}
.navlinks{display:flex;gap:30px;align-items:center}
.navlinks a{color:var(--muted);text-decoration:none;font-size:.88rem;font-weight:500;transition:color .2s}
.navlinks a:hover,.navlinks a.active{color:var(--text)}
.gh{border:1px solid var(--line);padding:7px 15px;border-radius:8px;color:var(--text)!important;font-family:var(--mono);font-size:.78rem;transition:.2s}
.gh:hover{border-color:var(--lime);box-shadow:0 0 0 1px var(--lime),0 0 24px -8px var(--lime)}
@media(max-width:760px){.navlinks a:not(.gh){display:none}}

/* ---- hero ---- */
header{position:relative;padding:96px 0 70px}
.eyebrow{font-family:var(--mono);font-size:.74rem;letter-spacing:.28em;text-transform:uppercase;color:var(--lime-dim);display:flex;align-items:center;gap:10px;margin-bottom:26px}
.eyebrow::before{content:"";width:30px;height:1px;background:var(--lime-dim)}
h1{font-family:var(--mono);font-weight:700;font-size:clamp(2.7rem,8vw,5.6rem);line-height:.98;letter-spacing:-.04em}
h1.smaller{font-size:clamp(2.2rem,6vw,4rem)}
h1 .dim{color:var(--faint)}
h1 .hl{color:var(--lime)}
.lede{font-size:clamp(1.05rem,2.2vw,1.3rem);color:var(--muted);max-width:600px;margin:26px 0 36px;font-weight:400}
.lede b{color:var(--text);font-weight:600}
.cta{display:flex;gap:14px;flex-wrap:wrap}
.btn{font-family:var(--mono);font-size:.86rem;font-weight:500;text-decoration:none;padding:13px 22px;border-radius:10px;transition:.22s;display:inline-flex;align-items:center;gap:9px}
.btn.primary{background:var(--lime);color:#0a0d06;font-weight:700}
.btn.primary:hover{transform:translateY(-2px);box-shadow:0 14px 40px -12px var(--lime)}
.btn.ghost{border:1px solid var(--line);color:var(--text)}
.btn.ghost:hover{border-color:var(--cyan);color:#fff}

/* ---- packet tunnel motif ---- */
.tunnel{position:relative;margin-top:64px;height:170px;border-radius:16px;overflow:hidden;border:1px solid var(--line);background:linear-gradient(180deg,var(--ink-2),#070b11);box-shadow:inset 0 0 80px -30px var(--cyan)}
.tunnel .label{position:absolute;font-family:var(--mono);font-size:.66rem;letter-spacing:.2em;text-transform:uppercase;color:var(--faint);top:12px}
.tunnel .label.l{left:16px}
.tunnel .label.r{right:16px;color:var(--lime-dim)}
.lane{position:absolute;left:0;right:0;height:1px;background:var(--line)}
.pkt{position:absolute;width:26px;height:6px;border-radius:3px;background:linear-gradient(90deg,transparent,var(--lime));box-shadow:0 0 14px 1px var(--lime);will-change:transform,opacity;animation:flow linear infinite}
.pkt.cy{background:linear-gradient(90deg,transparent,var(--cyan));box-shadow:0 0 14px 1px var(--cyan)}
@keyframes flow{0%{transform:translateX(-40px);opacity:0}8%{opacity:1}92%{opacity:1}100%{transform:translateX(1180px);opacity:0}}
.tunnel .ring{position:absolute;top:50%;right:54px;transform:translateY(-50%);width:120px;height:120px;border-radius:50%;border:1px dashed rgba(200,255,77,.3);display:grid;place-items:center}
.tunnel .ring::after{content:"";width:64px;height:64px;border-radius:50%;border:1px solid rgba(92,232,224,.35);box-shadow:0 0 40px -6px var(--cyan)}

/* ---- section scaffolding ---- */
section{padding:74px 0;position:relative}
.seclabel{font-family:var(--mono);font-size:.74rem;letter-spacing:.26em;text-transform:uppercase;color:var(--lime-dim);display:flex;align-items:center;gap:10px;margin-bottom:18px}
.seclabel::before{content:"//";color:var(--faint)}
h2{font-family:var(--display);font-weight:800;font-size:clamp(1.8rem,4.2vw,2.8rem);letter-spacing:-.02em;line-height:1.05}
h3.blk{font-family:var(--display);font-weight:700;font-size:1.4rem;letter-spacing:-.01em;margin:40px 0 14px}
.sub{color:var(--muted);max-width:640px;margin-top:16px;font-size:1.02rem}
p.flow-p{color:var(--muted);max-width:660px;margin-top:14px}
p.flow-p b{color:var(--text)}

/* ---- cards ---- */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:42px}
@media(max-width:840px){.grid3{grid-template-columns:1fr}}
.card{border:1px solid var(--line);border-radius:14px;padding:26px;background:linear-gradient(180deg,var(--panel),rgba(11,16,22,.4));position:relative;transition:transform .3s,border-color .3s,box-shadow .3s;overflow:hidden}
.card::before{content:"";position:absolute;inset:0 0 auto 0;height:2px;background:var(--accent,var(--lime));opacity:.7}
.card:hover{transform:translateY(-5px);border-color:color-mix(in srgb,var(--accent,var(--lime)) 55%,transparent);box-shadow:0 24px 60px -28px var(--accent,var(--lime))}
.card .tag{font-family:var(--mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--accent,var(--lime));margin-bottom:14px;display:inline-block}
.card h3{font-family:var(--mono);font-size:1.28rem;font-weight:700;letter-spacing:-.02em;margin-bottom:10px}
.card p{color:var(--muted);font-size:.95rem}
.card ul{list-style:none;margin-top:16px;display:flex;flex-direction:column;gap:7px}
.card li{font-size:.86rem;color:var(--muted);display:flex;gap:9px;align-items:flex-start}
.card li .i{font-family:var(--mono);font-size:.8rem;line-height:1.5}
.card li.pro .i{color:var(--lime)}
.card li.con .i{color:#ff7a6b}
.chip{display:inline-block;font-family:var(--mono);font-size:.7rem;padding:3px 9px;border-radius:999px;border:1px solid var(--line);color:var(--faint);margin-top:18px}

/* ---- steps timeline ---- */
.steps{margin-top:48px;position:relative}
.step{display:grid;grid-template-columns:78px 1fr;gap:8px;padding-bottom:40px;position:relative}
.step:not(:last-child)::before{content:"";position:absolute;left:26px;top:54px;bottom:-6px;width:1px;background:linear-gradient(var(--lime),var(--line) 60%)}
.num{font-family:var(--mono);font-weight:700;font-size:1.5rem;color:var(--lime);width:52px;height:52px;border-radius:12px;border:1px solid var(--line);display:grid;place-items:center;background:var(--ink-2)}
.step .body h3{font-family:var(--display);font-weight:700;font-size:1.22rem;margin-bottom:6px;letter-spacing:-.01em}
.step .body p{color:var(--muted);font-size:.96rem;margin-bottom:16px;max-width:600px}
.step .body p code,.inlinecode{font-family:var(--mono);font-size:.84em;background:var(--panel-2);padding:2px 6px;border-radius:5px;color:var(--cyan);border:1px solid var(--line-2)}

/* ---- code panels ---- */
.code{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#080c12;box-shadow:0 18px 50px -30px #000;margin-top:8px}
.code .top{display:flex;align-items:center;justify-content:space-between;padding:9px 14px;border-bottom:1px solid var(--line-2);background:rgba(255,255,255,.02)}
.code .fname{font-family:var(--mono);font-size:.74rem;color:var(--muted);display:flex;align-items:center;gap:8px}
.code .fname::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--lime);box-shadow:0 0 8px var(--lime)}
.code .copy{font-family:var(--mono);font-size:.7rem;color:var(--faint);background:none;border:1px solid var(--line);border-radius:6px;padding:4px 10px;cursor:pointer;transition:.2s}
.code .copy:hover{color:var(--lime);border-color:var(--lime)}
.code pre{padding:18px 18px;overflow-x:auto;font-family:var(--mono);font-size:.83rem;line-height:1.7;color:#d7dee8}
.code .c{color:var(--lime-dim);font-style:italic;opacity:.85}
.code .s{color:#9fe9c8}
.code .k{color:var(--cyan)}
.code .f{color:#e8d27a}

/* ---- platform / ledger tables ---- */
.tablewrap{margin-top:42px;border:1px solid var(--line);border-radius:14px;overflow:hidden}
table{width:100%;border-collapse:collapse;font-size:.92rem}
th,td{text-align:left;padding:15px 18px;border-bottom:1px solid var(--line-2);vertical-align:top}
thead th{font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--faint);background:rgba(255,255,255,.02)}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:rgba(200,255,77,.03)}
td .plat{font-family:var(--mono);font-weight:600;color:var(--text)}
.yes{color:var(--lime);font-family:var(--mono)}
.no{color:#ff7a6b;font-family:var(--mono)}
.caveat{color:#f5c451;font-family:var(--mono)}
.note{color:var(--muted);font-size:.86rem}
td.us{color:var(--lime);font-family:var(--mono);font-size:.82rem}
td.kr{color:var(--cyan);font-family:var(--mono);font-size:.82rem}

/* ---- callout ---- */
.callout{margin-top:30px;border:1px solid color-mix(in srgb,var(--cyan) 30%,transparent);border-radius:12px;padding:20px 22px;background:linear-gradient(180deg,rgba(92,232,224,.06),transparent);display:flex;gap:14px}
.callout.lime{border-color:color-mix(in srgb,var(--lime) 30%,transparent);background:linear-gradient(180deg,rgba(200,255,77,.06),transparent)}
.callout .ic{font-family:var(--mono);color:var(--cyan);font-weight:700}
.callout.lime .ic{color:var(--lime)}
.callout p{color:var(--muted);font-size:.93rem}
.callout b{color:var(--text)}

/* ---- big framing quote ---- */
.bigq{margin-top:36px;border-left:2px solid var(--lime);padding:6px 0 6px 24px;max-width:720px}
.bigq p{font-family:var(--display);font-weight:600;font-size:clamp(1.2rem,2.6vw,1.6rem);line-height:1.35;color:var(--text);letter-spacing:-.01em}
.bigq cite{display:block;margin-top:12px;font-style:normal;font-family:var(--mono);font-size:.78rem;color:var(--faint)}

/* ---- flow diagram (deep dive) ---- */
.flow{margin:48px 0 8px;position:relative;display:flex;flex-direction:column;gap:14px}
.zoneband{font-family:var(--mono);font-size:.7rem;letter-spacing:.2em;text-transform:uppercase;display:flex;align-items:center;gap:10px;margin-top:6px}
.zoneband.userspace{color:var(--lime)}
.zoneband.kernel{color:var(--cyan)}
.zoneband::after{content:"";flex:1;height:1px;background:linear-gradient(90deg,currentColor,transparent);opacity:.4}
.fnode{display:grid;grid-template-columns:46px 1fr;gap:16px;align-items:start;border:1px solid var(--line);border-left:2px solid var(--zc,var(--lime));border-radius:12px;padding:16px 18px;background:linear-gradient(180deg,var(--panel),rgba(11,16,22,.3))}
.fnode.k{--zc:var(--cyan)}
.fnode .fn{font-family:var(--mono);font-weight:700;color:var(--zc,var(--lime));font-size:1.05rem;width:38px;height:38px;border-radius:9px;border:1px solid var(--line);display:grid;place-items:center;background:var(--ink-2)}
.fnode .ft{font-family:var(--mono);font-weight:600;font-size:.95rem;color:var(--text);margin-bottom:4px}
.fnode .fd{color:var(--muted);font-size:.9rem}
.fnode .fd code{font-family:var(--mono);font-size:.85em;color:var(--cyan)}
.fcross{display:flex;align-items:center;gap:12px;padding:4px 0 4px 10px;font-family:var(--mono);font-size:.78rem;color:var(--faint);letter-spacing:.04em}
.fcross .bar{flex:none;width:24px;border-top:1px dashed var(--faint);height:1px}
.fcross b{color:var(--text);font-weight:600}

/* ---- footer ---- */
footer{border-top:1px solid var(--line-2);padding:50px 0 70px;margin-top:40px}
footer .wrap{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:flex-end}
footer .big{font-family:var(--mono);font-weight:700;font-size:1.1rem}
footer p{color:var(--faint);font-size:.84rem;max-width:460px;margin-top:10px}
footer a{color:var(--lime-dim);text-decoration:none}

/* ---- reveal ---- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
.d1{transition-delay:.08s}.d2{transition-delay:.16s}.d3{transition-delay:.24s}.d4{transition-delay:.32s}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}.pkt,.blob{animation:none}}