:root{
  --bg:#07090d; --bg2:#0b0f16; --panel:#0e141d; --panel2:#131b27;
  --line:rgba(255,255,255,.09); --txt:#e8edf4; --mut:#9aa7b8;
  --cop:#f59e0b; --cop2:#ff6b1a; --cy:#22d3ee; --grn:#4ade80;
  --r:16px; --font:'Inter',system-ui,sans-serif; --disp:'Space Grotesk',sans-serif; --mono:'JetBrains Mono',monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--txt);font-family:var(--font);line-height:1.6;overflow-x:hidden}
.grain{position:fixed;inset:0;pointer-events:none;opacity:.5;z-index:50;background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1px);background-size:3px 3px;mask-image:linear-gradient(#000,transparent)}
h1,h2,h3,h4{font-family:var(--disp);line-height:1.05;margin:.2em 0 .4em;letter-spacing:-.02em}
h2{font-size:clamp(2rem,5vw,3.4rem)} h1{font-size:clamp(3.4rem,10vw,7.5rem)}
.grad{background:linear-gradient(92deg,var(--cop),var(--cop2) 45%,var(--cy));-webkit-background-clip:text;background-clip:text;color:transparent}
.kicker{font-family:var(--mono);font-size:.75rem;letter-spacing:.22em;color:var(--cop);text-transform:uppercase}
.sub{color:var(--mut);max-width:62ch} code{font-family:var(--mono);background:rgba(255,255,255,.07);padding:.1em .4em;border-radius:6px;font-size:.85em}
.wrap{max-width:1120px;margin:0 auto;padding:5rem 1.25rem 1rem}
section.wrap{scroll-margin-top:70px}

/* nav */
.nav{position:fixed;top:0;left:0;right:0;z-index:40;display:flex;align-items:center;gap:1rem;padding:.7rem 1.2rem;background:rgba(7,9,13,.72);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.brand{font-family:var(--disp);font-weight:700;text-decoration:none;color:var(--txt);letter-spacing:.08em;font-size:.9rem}
.brand-mark{color:var(--cop)}
.nav-links{display:flex;gap:1rem;margin-left:auto}
.nav-links a{color:var(--mut);text-decoration:none;font-size:.85rem}.nav-links a:hover{color:var(--txt)}
.nav-right{display:flex;align-items:center;gap:.8rem}
.live-dot{font-family:var(--mono);font-size:.7rem;color:var(--mut);display:flex;align-items:center;gap:.4rem}
.live-dot i{width:8px;height:8px;border-radius:50%;background:var(--grn);box-shadow:0 0 10px var(--grn);animation:blink 2s infinite}
@keyframes blink{50%{opacity:.4}}

/* buttons */
.btn{display:inline-block;padding:.7rem 1.2rem;border-radius:999px;text-decoration:none;font-weight:600;font-size:.9rem;border:1px solid var(--line);color:var(--txt);background:var(--panel2);transition:.2s;cursor:pointer}
.btn.primary{background:linear-gradient(92deg,var(--cop),var(--cop2));color:#140a00;border:none;box-shadow:0 8px 30px rgba(245,158,11,.35)}
.btn.primary:hover{transform:translateY(-2px);box-shadow:0 12px 36px rgba(245,158,11,.5)}
.btn.ghost{background:transparent}.btn.ghost:hover{border-color:var(--cop)}
.btn.small{padding:.45rem .9rem;font-size:.8rem}
.chip{padding:.45rem 1rem;border-radius:999px;border:1px solid var(--line);background:var(--panel);color:var(--mut);cursor:pointer;font-size:.82rem}
.chip.active,.chip:hover{color:#000;background:var(--cop);border-color:var(--cop)}
.linklike{background:none;border:none;color:var(--cy);cursor:pointer;font-weight:700}

/* hero */
.hero{position:relative;min-height:100svh;display:flex;align-items:flex-end;overflow:hidden;border-bottom:1px solid var(--line)}
#hero3d{position:absolute;inset:0;width:100%;height:100%}
.hero-inner{position:relative;z-index:2;max-width:1120px;margin:0 auto;padding:7rem 1.25rem 3rem;width:100%}
.hero .kicker .pulse{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--grn);margin-right:.5rem;box-shadow:0 0 12px var(--grn);animation:blink 1.6s infinite}
.lede{max-width:60ch;color:#cbd5e1;font-size:1.08rem}
.hero-cta{display:flex;gap:.8rem;margin:1.4rem 0;flex-wrap:wrap}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;margin-top:1.5rem;max-width:720px}
.hero-stats div{background:rgba(14,20,29,.7);border:1px solid var(--line);border-radius:var(--r);padding:.9rem 1rem;backdrop-filter:blur(8px)}
.hero-stats b{display:block;font-family:var(--disp);font-size:1.9rem;color:var(--cop)}
.hero-stats span{color:var(--mut);font-size:.78rem}
.scroll-cue{position:absolute;bottom:1rem;left:50%;transform:translateX(-50%);z-index:2;font-family:var(--mono);font-size:.7rem;color:var(--mut);letter-spacing:.2em;display:flex;flex-direction:column;align-items:center;gap:.4rem}
.scroll-cue span{width:22px;height:36px;border:1px solid var(--mut);border-radius:12px;position:relative;display:block}
.scroll-cue span::after{content:"";position:absolute;top:6px;left:50%;width:4px;height:8px;margin-left:-2px;border-radius:4px;background:var(--cop);animation:cue 1.6s infinite}
@keyframes cue{50%{transform:translateY(10px);opacity:0}}

/* ticker */
.ticker{border-bottom:1px solid var(--line);background:#0a0d13;overflow:hidden;white-space:nowrap}
.ticker-track{display:inline-block;padding:.6rem 0;animation:tick 40s linear infinite;font-family:var(--mono);font-size:.78rem;color:var(--mut)}
.ticker-track b{color:var(--cop)}
@keyframes tick{to{transform:translateX(-50%)}}

/* cards/grids */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-top:1.5rem}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:1.5rem}
.card{background:linear-gradient(180deg,var(--panel2),var(--panel));border:1px solid var(--line);border-radius:var(--r);padding:1.3rem}
.card h3{margin-top:0}
.meter{height:8px;border-radius:99px;background:rgba(255,255,255,.08);margin:.8rem 0 .3rem;overflow:hidden}
.meter i{display:block;height:100%;width:var(--v);background:linear-gradient(90deg,var(--cop),var(--cy));border-radius:99px}
.card small,.note{color:var(--mut);font-size:.82rem}
.vs{display:grid;grid-template-columns:1.2fr 1fr;gap:1rem;margin-top:1rem}
.vs-col{border:1px solid var(--line);border-radius:var(--r);padding:1.2rem;background:var(--panel)}
.vs-col.good{border-color:rgba(74,222,128,.4)}
.vs-col ul{margin:.5rem 0;padding-left:1.1rem;color:#cbd5e1}

/* timeline */
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:.8rem;margin-top:1.5rem}
.tl{border:1px solid var(--line);border-radius:var(--r);padding:1rem;background:var(--panel);position:relative;overflow:hidden}
.tl::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--cop),var(--cy))}
.tl b{font-family:var(--mono);color:var(--cop);font-size:.8rem}

/* tables */
.filters{display:flex;gap:.5rem;margin:1rem 0;flex-wrap:wrap}
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r)}
table.cats{width:100%;border-collapse:collapse;font-size:.88rem;min-width:760px;background:var(--panel)}
table.cats th,table.cats td{padding:.8rem .9rem;text-align:left;border-bottom:1px solid var(--line)}
table.cats th{font-family:var(--mono);font-size:.7rem;letter-spacing:.12em;color:var(--mut);text-transform:uppercase;background:rgba(255,255,255,.02)}
table.cats tr.hl td{background:rgba(245,158,11,.08)}
.callout{margin-top:1rem;border:1px dashed rgba(245,158,11,.5);border-radius:var(--r);padding:1rem 1.2rem;background:rgba(245,158,11,.06)}

/* anatomy */
.anat{display:grid;grid-template-columns:1fr 1.2fr;gap:1.5rem;align-items:start;margin-top:1.5rem}
.anat-svg{background:radial-gradient(circle at 50% 40%,#16202f,#0a0e14);border:1px solid var(--line);border-radius:20px;padding:1rem;text-align:center}
#crossSvg{width:100%;max-width:340px}
#crossSvg .L{fill:none;stroke-width:14;cursor:pointer;transition:.2s}
#crossSvg .L[data-l=jacket]{stroke:#f59e0b33;stroke-width:22}
#crossSvg .L[data-l=shield]{stroke:#94a3b833}
#crossSvg .L[data-l=foil]{stroke:#22d3ee33}
#crossSvg .L[data-l=spline]{stroke:#47556955}
#crossSvg .pairs circle{fill:#1e293b;stroke:#f59e0b;stroke-width:2;cursor:pointer}
#crossSvg .cores circle{fill:#f59e0b}
#crossSvg .on{filter:drop-shadow(0 0 8px var(--cop))}
.layers{list-style:none;margin:1rem 0 0;padding:0;display:grid;gap:.4rem}
.layers li{display:flex;gap:.8rem;align-items:center;border:1px solid var(--line);border-radius:12px;padding:.55rem .8rem;cursor:pointer}
.layers li.on{border-color:var(--cop);background:rgba(245,158,11,.08)}
.layers b{font-size:.9rem}.layers span{margin-left:auto;color:var(--mut);font-size:.76rem}
.hint{color:var(--mut);font-family:var(--mono);font-size:.72rem}

/* physics */
.phys{display:grid;grid-template-columns:1.3fr 1fr;gap:1.5rem;margin-top:1.5rem;align-items:start}
#noiseCanvas,#lightCanvas{width:100%;border:1px solid var(--line);border-radius:var(--r);background:#05080d}
.phys-ctl{display:flex;align-items:center;gap:1rem;margin-top:.6rem;color:var(--mut);font-size:.85rem}
.phys-txt ul{color:#cbd5e1}

/* shielding */
.shield-grid,.conn-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:.6rem;margin:1.2rem 0}
.shield-grid button,.conn-grid button{background:var(--panel2);border:1px solid var(--line);color:var(--txt);border-radius:14px;padding:.9rem .4rem;font-family:var(--mono);font-weight:700;cursor:pointer;font-size:1rem}
.shield-grid button small,.conn-grid button small{display:block;font-weight:400;color:var(--mut);font-size:.7rem;margin-top:.2rem}
.shield-grid button.on,.conn-grid button.on{border-color:var(--cy);box-shadow:0 0 0 1px var(--cy),0 8px 30px rgba(34,211,238,.25)}
.warn{margin-top:1rem;border:1px solid rgba(255,107,26,.4);background:rgba(255,107,26,.07);padding:1rem 1.2rem;border-radius:var(--r)}

/* tags */
.tagrow{display:flex;gap:.4rem;flex-wrap:wrap;margin-top:.6rem}
.tag{font-family:var(--mono);font-size:.7rem;background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.3);color:var(--cy);padding:.25rem .6rem;border-radius:99px}

/* plug 3d */
.plug3d{border:1px solid var(--line);border-radius:20px;overflow:hidden;background:radial-gradient(circle at 50% 20%,#141d2c,#05080d);margin-top:1.2rem}
#plug3d{width:100%;height:420px;display:block}
.pinbar{display:flex;gap:.4rem;padding:.9rem;flex-wrap:wrap;justify-content:center;border-top:1px solid var(--line)}
.pinbar button{width:52px;height:52px;border-radius:12px;border:1px solid var(--line);background:#0b1119;color:var(--txt);cursor:pointer;font-family:var(--mono);font-weight:700}
.pinbar button.on{border-color:var(--cop);box-shadow:0 0 14px rgba(245,158,11,.6)}
.factline{font-family:var(--mono);font-size:.85rem;color:var(--cy);margin-top:.7rem}

/* wiring */
.wire-ctl{display:flex;gap:1rem;margin:1.2rem 0;flex-wrap:wrap}
.seg{display:flex;background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:4px;gap:4px}
.seg button{border:none;background:transparent;color:var(--mut);padding:.5rem 1rem;border-radius:999px;cursor:pointer;font-weight:600}
.seg button.on{background:var(--cop);color:#000}
.wire-grid{display:grid;grid-template-columns:1fr auto 1fr;gap:1rem;align-items:stretch}
.wire-end{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:1rem}
.wire-end ol{list-style:none;margin:0;padding:0;display:grid;gap:.3rem}
.wire-end li{display:flex;align-items:center;gap:.6rem;font-family:var(--mono);font-size:.78rem;background:rgba(255,255,255,.03);border-radius:10px;padding:.4rem .6rem;border:1px solid transparent}
.wire-end li i{width:46px;height:14px;border-radius:7px;display:inline-block;border:1px solid rgba(255,255,255,.3)}
.wire-mid{align-self:center;color:var(--mut);font-family:var(--mono);font-size:.8rem;text-align:center;max-width:150px}

/* steps */
.steps{display:grid;gap:.6rem;margin-top:1.2rem}
.step{display:flex;gap:1rem;align-items:flex-start;border:1px solid var(--line);border-radius:var(--r);padding:1rem;background:var(--panel);opacity:.55;transition:.25s}
.step.on{opacity:1;border-color:var(--cop);background:linear-gradient(180deg,rgba(245,158,11,.12),var(--panel))}
.step.done{opacity:.85;border-color:rgba(74,222,128,.4)}
.step b{display:grid;place-items:center;width:34px;height:34px;flex:none;border-radius:50%;background:var(--panel2);border:1px solid var(--line);font-family:var(--mono)}
.step.on b{background:var(--cop);color:#000;border-color:var(--cop)}
.step h4{margin:0 0 .2rem}.step p{margin:0;color:var(--mut);font-size:.9rem}
.step-nav{display:flex;gap:.6rem;margin:1rem 0}
.checklist #toolList{display:grid;grid-template-columns:1fr 1fr;gap:.4rem}
.tool{display:flex;gap:.5rem;align-items:center;font-size:.88rem;background:rgba(255,255,255,.03);padding:.5rem .7rem;border-radius:10px;cursor:pointer;user-select:none}
.tool.done{text-decoration:line-through;color:var(--mut)}

/* testing */
.testgrid{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:1.2rem}
.faults{display:flex;gap:.4rem;flex-wrap:wrap;margin:.6rem 0}
.faults button{padding:.45rem .8rem;border-radius:10px;border:1px solid var(--line);background:var(--panel2);color:var(--txt);cursor:pointer;font-size:.8rem}
.faults button.on{border-color:var(--grn)}
.tester{background:#05080d;border:1px solid var(--line);border-radius:14px;padding:1rem;margin-top:.6rem}
.t-screen{font-family:var(--mono);background:#0a1a12;color:var(--grn);border-radius:8px;padding:.7rem;min-height:44px;font-size:.85rem}
.t-leds{display:grid;grid-template-columns:repeat(8,1fr);gap:.4rem;margin-top:.7rem}
.t-leds i{height:26px;border-radius:6px;background:#1a2330;display:block}
.t-leds i.ok{background:var(--grn);box-shadow:0 0 10px var(--grn)}
.t-leds i.bad{background:#ef4444;box-shadow:0 0 10px #ef4444}
.tiers li{margin-bottom:.5rem;color:#cbd5e1}
.faults-list{color:#cbd5e1;font-size:.9rem}

/* forms */
.form label{display:grid;gap:.3rem;font-size:.82rem;color:var(--mut);flex:1}
.form input,.form select{background:#0a0f16;border:1px solid var(--line);color:var(--txt);border-radius:10px;padding:.6rem .8rem;font-size:.9rem;width:100%}
.frow{display:flex;gap:1rem;margin-bottom:1rem;flex-wrap:wrap}
.chk{align-items:center;grid-template-columns:auto;justify-items:start}
.hidden{display:none!important}
#wizOut h3{margin-top:0}
.calc-out{margin-top:1rem;font-family:var(--mono);font-size:.88rem}
.bigfact{font-size:1.05rem;color:#fde68a}
.poe-out{display:grid;gap:.3rem;margin-top:.8rem;font-family:var(--mono);font-size:.85rem}

/* quiz */
#quizBox .q{padding:.8rem 0;border-bottom:1px solid var(--line)}
#quizBox .q h4{margin:.2rem 0 .6rem}
#quizBox .opt{display:block;width:100%;text-align:left;margin:.3rem 0;padding:.6rem .9rem;border-radius:10px;border:1px solid var(--line);background:var(--panel2);color:var(--txt);cursor:pointer}
#quizBox .opt:hover{border-color:var(--cop)}
#quizBox .opt.picked{border-color:var(--cy);background:rgba(34,211,238,.1)}

/* faq */
.faq details{border:1px solid var(--line);border-radius:12px;padding:.9rem 1rem;margin-bottom:.5rem;background:var(--panel)}
.faq summary{cursor:pointer;font-weight:600;font-family:var(--disp)}
.faq p{color:var(--mut)}

/* footer */
footer{border-top:1px solid var(--line);margin-top:4rem;background:#05070b}
.foot{display:flex;gap:2rem;justify-content:space-between;padding-bottom:0!important}
.foot p{color:var(--mut);font-size:.88rem;max-width:52ch}
.foot-links{display:flex;gap:1rem;align-items:flex-start}
.foot-links a{color:var(--cy);font-size:.85rem}
.fine{text-align:center;color:var(--mut);font-family:var(--mono);font-size:.72rem;padding:1.5rem}

/* reveal */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s,transform .7s}
.reveal.in{opacity:1;transform:none}

@media(max-width:900px){
  .grid3,.grid2,.vs,.anat,.phys,.testgrid,.timeline{grid-template-columns:1fr}
  .nav-links{display:none}
  .wire-grid{grid-template-columns:1fr}
  .wire-mid{max-width:none}
  .shield-grid,.conn-grid{grid-template-columns:repeat(2,1fr)}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
}